ML18092A336

Vols 1 & 2 to App XII to Salem Generating Station 316(b) Demonstration, Bay Anchovy (Anchoa Mitchilli): Synthesis of Info of Natural History,W/Ref to Occurrence in Delaware River....

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DEADLINE RETURN DATE RECORDS FACILITY BRANCH Appendix XII PS~G Bay Anchovy (Anchoa mltch/111)

The Energy People Volume 1of2 8410~30344 840921 PDR AOOCK 05000354 A PDR

BAY ANCHOVY (ANCHOA MITCHILLI):

A SYNTHESIS OF INFORMATION OF NATURAL HISTORY, WITH REFERENCE TO OCCURRENCE IN THE DELAWARE RIVER AND ESTUARY AND INVOLVEMENT WITH THE SALEM GENERATING STATION SALEM GENERATING STATION 316(b) DEMONSTRATION APPEND! X XI I NPDES Permit No. NJ0005622 NR~ Operating Licensing DPR-70 & DPR-75 NRC Docket Numbers 50-272 & 50-311 Public Service Electric and Gas Company 80 Park Plaza Newark, N.J. 07101 May 1984

• • 1:

• PREFACE The Salem Generating Station 316(b) Demonstration summarizes the results of 15 years of environmental studies conducted by Public Service Electric and Gas Company (PSE&G) and its consultants on the Delaware River Estuary. Early studies responded to Nuclear Regulatory Commission requirements.

Later studies were conducted according to a plan approved by the U.S. Environmental Protection Agency - Region II. The "Salem Generating Station 316(b) Ecological Impact Assessment Plan-of-S~udy" listed nine fish species and two macroinvertebrate species as target species. It directed that in-depth studies be conducted for these species and that species-specific reports be prepared. These reports are Appendices II through XII of the Salem Generating Station 316(b) Demonstration.

Essentially, these appendices are species monographs that follow a standardized Table of Contents to facilitate cross-referencing among species in the Demonstration. Each report addresses the species first, then it describes the occurrence of PvFulations or stocks of that species within the Delaware Estuary. Emphasis is on post-1977 data collected according to the Plan-of-Study. Study data are

• corroborated by, and supplemented with, literature to develop important themes. Finally, aspects of the species involvement with Salem through entrainment and/or impingement are described.

i

CONTENTS Page PREFACE.. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

• i CONTENTS. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

• ii INTRODUCTION ***** . . . ...................................... .

iv 1.0 IDENTITY ******* 1-1 1.1 NOMENCLATURE. 1-1 1.1.1 Valid Name *** 1-1 1.1. 2 Synonymy ***** 1-1 1.2 TAXONOMY ******** 1-1

1. 2 .1 Affinities ** 1-1

1. 2. 2 Taxonomic Status ** 1-4 1.2.3 Subspecies ******* 1-4 1.2.4 Standard Common Names Vernacular Names. 1-4 1.3 MORPHOLOGY *************** 1-4

1. 3 .1 External Morphology ** 1-4

1. 3. 2 Cytomorphology ***.*** 1-5

1. 3. 3 Protein Specificity. 1-5

1. 3 .4 Aging . . . . . . . . . . . . . . . . 1-5 2.0 DISTRIBUTION .******* 2-1 2.1 TOTAL AREA ** 2-1 2.2 DIFFERENTIAL DISTRIBUTION ** 2-1 2.2.1 Preadult ** 2-1 2.2.2 Adults **** 2-4 2.3 DETERMINANTS OF DISTRIBUTION CHANGE ** 2-5 2.4 HYBRIDIZATION .* 2-6 2.4.1 Hybrids **** 2-6 3.0 BIONOMICS AND LIFE HISTORY ** 3-1 3.1 REPRODUCTION ** 3-1 3 .1.1 Sexuality. 3-1 3.1.2 Maturity ** 3-1 3 .1. 3 Mating **** 3-1 3 .1. 4 Fert il izat ion. 3-1 3.1.5 Gonads *** 3-1 3 .1. 6 Spawning. 3-4 3.1.7 Spawn ***** 3-5 3.2 EMBRYONIC PHASE *** 3-6 3.2.1 Development, Duration. 3-6 3.2.2 Environmental Conditions, Hardiness ** 3-6 3.3 LARVAL -PHASE *** ~ * ********** 3-7 3.3.1 Development, Duration ** 3-7 3.3.2 Environmental Conditions, Hardiness. 3-8 3.3.3 Competitors ** 3-9 3.4 JUVENILE PHASE .* 3-9 3.4.1 Development, Du rat ion ** 3-9 3.4.2 Environmental Conditions, Hardiness. 3-10

• 3.4.3 Competitors ii I

Page 3.4.4 Predators. 3-10 3.5 ADULT PHASE .** 3-10 3.5.1 Longevity .* 3-10 3.5.2 Environmental Conditions, Hardiness .** 3-10 3.5.3 Competitors .********..*.. 3-12 3.5.4 Predators *.***..**.****** 3-12 3.6 PARASITES, DISEASES, INJURIES, ABNORMALITIES *. 3-13 3.7 NUTRITION AND GROWTH ** 3-14 3.7.1 Feeding ***** 3-14 3.7.2 Food .**.**..* 3-14 3.7.3 Growth Rate ** 3-15 3.7.4 Metabolism *** 3-17 3.8 BEHAVIOR *****.** 3-18 3.8.1 Migrations and Local Movements. 3-18 3.8.2 Schooling **.***.****** 3-19 3.8.3 Response to Stimuli *** 3-20 4.0 POPULATION *.* 4-1 4.1 STRUCTURE **. 4-1 4.1.1 Sex Ratio. * *..* 4-1 4.1. 2 Age Composition ** 4-2 4.1. 3 Size Composition ** 4-2 4.2 ABUNDANCE AND DENSITY. 4-3 4.2.1 Average Abundance. 4-3 4.2.2 Changes in Abundance .* 4-3 4.2.3 Average Density ..***** 4-4 4.2.4 Changes in Density ..* 4-6 4.3 NATALITY AND REPRODUCTION. 4-6 4.3.1 Reproductiori Rate **** 4-6 4.4 MORTALITY AND MORBIDITY .** 4-7 4.4.1 Mortality Rates ***** 4-7 4.4.2 Factors Causing or Affecting Mortality. 4-8 4.6 THE POPULATION IN THE COMMUNITY AND THE ECOSYSTEM. 4-8 5.0 EXPLOITATION **************************************** 5-1 6.0 ENTRAINMENT **************** 6-1 6.1 DENSITY IN INTAKE WATER. 6-1

6. 2 SURVIVAL ***************** 6-5 7.0 IMPINGEMENT **.******.****** 7-1 7.1 DENSITY IN INTAKE WATER ** 7-1 7.2 AGE CLASS COMPOSITION. 7-2 7.3 COLLECTION EFFICIENCY. 7-3

• 7.4 RECIRCULATION 7.5 LATENT SURVIVAL. 7-3 LITERATURE CITED ** *************************************** 1

• Not discussed: inappropriate and/or no data available.

iii

INTRODUCTION Anchoa mitchilli, commonly known as bay anchovy, inhabits the estuarine and inshore marine waters of the Atlantic and Gulf coasts from Maine to the Yucatan Peninsula, Mexico.

Bay anchovy is a small, schooling species which is probably the most abundant and widespread fish in Middle Atlantic estuaries including the Delaware system. In the Delaware Estuary, bay anchovy is seasonally abundant from the mouth of the bay to rkm 150 near Philadelphia, PA, and individuals have been recorded as far upstream as rkm 212 near Trenton, NJ. It also has been collected in many of the tidal tributaries within the estuary.

After overwintering in deep downbay channels or nearshore ocean water, bay anchovy generally migrate into shoal areas within the Delaware Estuary during spring. The spawning season is protracted, occurring from May through September, and as progeny develop they move into low salinity nursery areas where they remain until fall. In the fall, juveniles and adults reverse the spring migration, returning to overwintering areas.

Bay anchovy is not commercially or recreationally exploited, but is an important link in energy transfer between trophic levels. They consume and convert biomass of small plankters and in turn are fed upon by predators including commercially important species such as weakfish, bluefish and flounder.

In 1979, the U.S. Environmental Protection Agency - Region II (EPA) selected bay anchovy as a target species for the Salem 316(b) Demonstration. This report presents technical information on the species and its use of the Delaware River and Estuary. It also relates information on aspects of involvement with Salem that can be quantified in the Demonstration, to the degree possible, and evaluated.

iv

1-1 SECTION 1. 0 IDENTITY 1.1 NOMENCLATURE 1.1.1 Valid Name Anchoa mitchilli (Valenciennes) 1.1.2 Synonymy Engraulis mitchilli - Cuvier and Valenciennes, 1848:50, New York Stol~phorus mitchilli - Jordan and Gilbert, 1883:248, Galveston Anchovia mitchilli - Fowler*, 1906:110 Delaware R.

Anchovi~lla mitchilli - Jordan and Seale, 1926:405

• Anchoa mitchilli mitchilli - Hildebrand, 1943:87 (cited from Hildebrand, 1963) 1.2 TAXONOMY 1.2.1 Affinities The following systematic arrangement follows Nelson (1976).

Phylum Chordata Subphylum Vertebrata Class Osteichthyes Subclass Actinopterygii Superorder Clupeomorpha Order Clupeiformes Suborder Clupeoidei Family Engraulidae

1-2 Genus Anchoa (Jordan and Evermann, 1927)

The following generic description is from Hildebrand (1943):

"Body usually quite elongate, moderately to strongly compressed, maxillary long, reaching to or more usually beyond joint of lower jaw, frequently nearly or quite to margin of opercle, always more or less pointed; gill rakers not very numerous, seldom more than 30 on lower limb of first arch, not increasing in number with the age and the growth of the fish; vertebrae about 38 to 44, rarely 45 or 46; origin of anal usually somewhere under the base of the dorsal, occasionally behind it; ventral generally inserted well in advance or dorsal, but always nearer dorsal than base of pectoral."

Within the mid-Atlantic region two genera, Anchoa and Engraulis, and three species of the family Engraulidae have been recorded. These include: A. hepsetus, striped anchovy; A. mitchilli, bay anchovy; and E. eurystole, silver anchovy. -Only striped anchovy and bay anchovy have been taken in the lower Delaware River and Bay in collections made during the present study. Until recently, a fourth species, A. duodecim, the New Jersey anchovy, was recognized on the basis of a single specimen originally described by E.

D. Cope in 1869 (Hildebrand, 1963; Robins et al., 1980).

Nelson (1983) has determined that the specimen is Thrissina encrasicholoides, an Inda-Pacific anchovy which does not occur in the New World.

Adult mid-Atlantic engraulids may be differentiated by the placement of the anal fin relative to the dorsal fin and the number of anal fin rays as follows (Jones et al., 1978; Wang and Kernehan, 1979):

I. Origin of anal fin at level of fifth to eighth dorsal ray; 18-23 anal rays.

A. hepsetus striped anchovy II. Origin of anal fin posterior to fifth or sixth dorsal ray; 23-30 anal rays.

A. mitchilli bay anchovy III. Origin of anal fin three-quarters eye diameter behind vertical from last dorsal ray; 15-19 anal rays.

E. eurystole silver anchovy

1-3 Preadult stages of bay anchovy commonly occur throughout the lower Delaware River and Bay while those of striped and silver anchovies are, if present, much more restricted in their local distributions (Wang and Kernehan, 1979).

Comparisons among the preadult stage~ are presented in Table 1-1. While the striped anchovy spawns principally offshore (Colton et ~l., 1979), a few eggs have been collected during the present study in the higher salinity regions of the lower Delaware Bay. If concurrent spawning occurs, the eggs of bay and striped anchovy may be separated on the basis of shape and size (Lippson and Moran, 1974). Silver anchovy spawn primarily in offshore waters along the Mid-Atlantic Bight (Lippson and Moran, 1974~ Berrien et al., 1978: Wang and Kernehan, 1979: Colton et al., 1979): although its eggs may also be identified on the basis of size and shape, it is not expected to occur in Delaware Bay and has not been collected during the present study.

Early larvae < 10 mm TL of the three species are difficult to differentiate. On the basis of relative abundance of eggs (as above) and identifiable older individuals, all engraulid larvae < 10 mm TL were considered to be bay anchovy. During the present study 1979-1982, over 700,000 juvenile and adult bay anchovy were taken, compared to 81 striped anchovy and 0 silver anchovy.

Species A. mitchilli (Valenciennes) (Fig. 1-1)

The following description of the adult is based on Jones et al. (1978) and Hildebrand (1963):

Number of: Dorsal rays 13-17: anal rays 23-30; vertebrae 19+21-22=38-44: gill rakers 15-20+20-26:

scales, ca. 38-44 from upper angle of gill opening to base of caudal fin. Proportions expressed in percent standard length: head length 22.0-28.0, body depth 16.0-27.0.

Body slender, moderately compressed: head depth equal to length without snout and one-fourth of eye.* Maxillary pointed, reaching almost to margin of opercle. Dorsal fin low, its origin almost straight, anal fin origin behind fifth or sixth dorsal ray. Color greenish with bluish reflections above, pale silvery below: narrow silver lateral stripe masked by scales.

1-4 1.2.2 Taxonomic Status This species may be distinguished by its morphological characteristics as described by Jones et al. (1978) and Hildebrand (1963).

1.2.3 Subspecies Two subspecies are described over its range: A. mitchilli mitchilli, a northern subspecies, and A. mitchTlli diaphana, a southern subspecies (Hildebrand, 1963). See Section 1.3.1 for a discussion of populations.

1.2.4 Standard Common Names, Vernacular Names Commonly known as the bay anchovy, A. mitchilli has also been listed as anchovy (Hildebrand and Schroeder, 1928; Perlmutter~ 1939), common anchovy (Greeley, 1939), glass minnow (Springer and Woodburn, 1960), shiner (Perlmutter, 1939) and whitebait (Bigelow and Schroeder, 1953).

1.3 MORPHOLOGY 1.3.1 External Morphology Descriptions of various life stages of A. mitchilli are given in Sections 1.2.1; 3.1.7; 3.2.1; "3:'"3.1 and 3.4.1.

Conversion equations for standard (SL), fork (FL), and total (TL) length are given in Table 1-2.

Hildebrand (1943) believed that distinct subspecies and populations of bay anchovy were present along the Atlantic coast from Massachusetts to Yucatan, Mexico. He based the existence of northern and southern subspecies on regional variation of vertebral counts (Table 1-3), body depth (Table 1-4) and pectoral fin length (Table 1-5). The southern subspecies has a consistently deeper and more strongly compressed body, longer pectoral fin, and narrower silvery lateral band. Both Hubbs and Perlmutter (1942) and Hildebrand (.1943) observed variations in vertebrae counts with latitude. Hildebrand concluded that the bay anchovy may only migrate over a small portion of its range on the premise that the meristic and morphometric differences found

1-5

• would not occur if migrations over its entire range took place. However, recent studies with other species demonstrate high variability in meristic counts and the need to verify these kinds of data with electrophoretic studies (Vrooman et al., 1981). Also, inferences drawn from proportional morphometric measurements may be biased because morphometric ratios are often highly correlated with overall specimen size (Atchley et al., 1976). Whether differences in the bay anchovy population(s) inhabiting the Atlantic coast are genetically or environmentally induced needs to be studied further, as the evidence presented for the existence of two subspecies is not conclusive.

1.3.2 Cytomorphology Gold et al. (1980), in reviewing chromosomal studies, list no such studies for bay anchovy.

1.3.3 Protein Specificity DeLigny (1969) reported no information on protein specificity of bay anchovy, and no record of such studies being conducted since 1969 has been located.

1.3.4 Aging Early attempts to age bay anchovy on the basis of commonly used morphological stuctures such as scales or otoliths were described by Stevenson (1958) as unsuccessful. More recently, success at aging specimens of the closely-related northern anchovy from otoliths has been documented (Collins and Spratt, 1969; Sunada, 1975, etc.). Based on these studies, bay anchovy otolith analysis was conducted during the present study to produce an age-length key (Section 3.7.3) for Delaware Bay specimens. Otoliths were removed from a total of 1,285 specimens collected in April 1983 by trawl and during May through August from the Salem intake screens. Criteria for judging age were based on those established by Collins and Spratt (1969); methods and materials are presented in Appendix I.

Although the arbitrary birthdate of January 1 is frequently used in fisheries work, this report considers May 1 as the I

r

1-6 birthdate as it more accurately approximates the actual age of the bay anchovy. The rationale for this choice is given in Section 3.1.6.

1------

1-7

-* Table 1-1 Description of the preadult stages of bay anchovy, striped anchovy and silver anchovy (adapted from Jones et al., 1978; Wang and Kernehan, 1979).

EGGS Transparent, elliptical; major axis 1.2-1,8 mm, minor axis 0.70-0.94 mm.

Striped anchovy Transparent, spherical or slightly oval; major axis 0,80-1.36 mm, minor axis 0.65-1.26 mm (d .. pen*1ing on salinity).

--- Bay anchovy Transparent, and oblong; major axis 1.02-1.25 mm, minor axis 0.50-0.80 mm.

--- Silver anchovy PRO LARVAE Hatching length ca. 3.6-4.0 mm, largest described 4.5 mm. Duration of stage ca. 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Body long, slender, thread-like; head somewhat decurved. Yolk ma.as elongate, tapering to a point posteriorly. Pins lacking; finfold continuous from first eomite to vent and forward over posterior 1/3 of yolk. Body highly transparent; slightly greenish shade on haad, n~ definite chromatophoree.

--- Striped anchovy Hatching length l.8-2.0 mm; largest described 3.75 mm. Body elongate, flattened, rather slender. Head deflected downward over yolk at hatching, straight at 2.6':'2.8 mm. Yolk pear shaped, taperlng to a point posteriorly. Incipient rays in caudal at 3. 7 mm. Notochord thick, <Jranular; gut a straight tube.

Pigment initially lacking; at 3.7 mm a few chromatophorea ventrally between anus and caudal fln, a few along ventral rnidline below gut.

--- Bay anchovy Hatching length ca. 2.0-3.0 mm TL; at l day, ca. 3.4 mm. Body elongate, head not deflected over yolk 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> after hatching. Yolk mass elongate, tapering to point posteriorly. Dorsal fin originates just behind auditory vesicles. Finfold straight-edged in newly hatched larvae. Preanal finfold extends about halfway across yolk. Incipient rays form in caudal anlagen of pectorals present in l day old specimen.

Notochord reticulate; gut a straight tube at hatching. Pigment present within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, melanophores in series along intestine, posterior to yolk and at base of ventral finfold posterior to vent.

Silver anchovy POST LARVAE Specimens describe*1 5. 0 to young. Body slender at 5.0 mm, slightly <leaper at 10.0 mm. Mouth ohliguu early in stage, gape extending to eye at 5,0 mm, beyond anterior mar.gin of eye at 10,0 mm. Iler.eat, anal, caudal and pectoral fins evident, but lacking rays at 5.0-6.0 mm. Caudal forked at 10.0 nun. Incipient pelvics at 13.0 mm.

--- Striped anchovy Specimens described 2.7 mm to juvenile (20.0 mm). Body long, slender. Mouth terminal, apparently functional at 2. 7 mm. Gut appears convoluted. Dorsal and anal flnbuds present; origin of anal finbud well anterior to insertion of dorsal finbud.

Bay anchovy Specimens described 4.0-22.8 mm. Yolk mass absorbed at 4.0 mm, mouth large, oblique terminal; gape reaching middle of eye. Opercle well differentiated. Incipient rays forming in dorsal, caudal and anal fine. Intestine appears convoluted posteriorly. Preanal finfold extending slightly forward to distal end of pectoral fin and almost below anterior end of doreal finfold.

Silver anchovy JUVENILES Juvenile elongate with moderate lateral compression; abdominal region only slightly compressed. All fins with full complement of rays (D, 13-16; A. 18-23). Ventral fins inserted approximately midway between origins of pectoral and anal fine. Dorsal,and ana1 fins overlap by a few rays. Snout more elongate than bay anchovy young.

--- Striped anchovy Juvenile (15.5 mm and larger.) have large gape and full complement of (ll, 14-16; A. 23-30, usually 28).

Small juvenile more slender in from than adults. Body laterally compressed, abdominal region tapers to a midventral ridge. Origin of anal fins under midpoint of dorsal fin. Snout less elongate than striped anchovy young.

Bay anchovy Description act available.

--- Silver anchovy

Table 1-2 Conversion equations for standard (SL), fork (FL), and total (TL) length of the bay anchovy.

Sample Standard Region Reference Size Equation 2 Size Ran~e Error r Delaware River and Estuary Present Study 11-80 mmTL 101 SL=O. 925TL O. 965 0.006 0.997 (rkm 64-97) 101 TL=l.084SL l.0 36 0.006 0.997 101 FLnl.045SL l.02l 0.005 0.997 101 SLn0,958FL0. 979 0.005 0.997 101 TL=l.038FL l.Ol4 0.003 0.999 0 986 101 FL=0.965Tt

• 0.003 0.999 Folly Beach, SC Anderson et al., 1977 33-77 mm'fL 215 SL=l.4286+o.7954TL 0.015 0.963 215 TL=2.3699+1.1657SL 0.022 0.963 215 FL*3.7405+1.0208SL 0.014 0.980 I-'

215 SL*l.7622+o.9418FL 0.013 0.980 I 215 TL=l.Ollo+l.1243FL 0.020 0.967 CD 215 FL"'4 .1155+o. 8314TL 0.015 0.967 Georgia coastal waters Jorgenson and Miller, 12-84 mmTL 72 SL=0.768+o.812TL 1968 10-71 mmSL 61 TL=0.389+1.078SL 10-71 mmSL 61 FL=0.315+1.214SL 11-76 mmFL 64 SL~0.3So+o.929FL 11-76 mmFL 64 TL=0.701+1.126FL 12-84 mmTL 72 FL=0.566+o.887TL Galveston Bay, TX Matlock et al., 1975 22-52 mmSL 100 TL=0.22391+1.20634SL 0.994

1-9

• Table 1-3 Frequency distribution of the total number of vertebrae in 1247 specimens of Anchoa mitchilli (both subspecies) by states (from Hildebrand, 19 43)

• vertebrae Number States 38 39 40 41 42 43 44 Massachusetts 12 53 20 l Rhode Island l 7 4 Connecticut 7 17 5 New York 13 41 15 2 New Jersey 2 23 41 14 l Delaware 2 18 50 6 Maryland 5 17 44 9 Virginia l 2 37 43 17 North Carolina 3 8 26 58 10 South Carolina 2 26 58 3 Georgia 3 10 6 l Florida (east coast) 1 10 7 l Florida (west coast) 34 68 18 l Mississippi 8 21 4 Louisiana l 21 72 14 Texas 6 30 56 4 Yucatan 52 72 2

Table 1-4 Frequency distribution of-depth of body expressed in percent of standard length in 1672 specimens of Anchoa mitchilli (both subspecies) by states (from' Hildebrand, 194 3)

• Body depth (percent SL) Average length States 17 18 19 20 21 22 23 24 25 26 27 (mm SL)

Massachusetts 7 16 22 12 7 6 l 52.5 Rhode Island 2 2 4 l l 52.5 Connecticut 8 25 15 2 2 l 44.3 New York 4 9 22 19 17 10 3 l 57. 3 New Jersey l 4 20 36 35 17 10 3 l 57.2 Delaware l 4 15 37 35 21 4 55.7 Maryland 2 11 36 32 9 5 52.9 Virginia 2 19 34 41 23 8 5 l 54.3 .......

I North Carolina l 14 32 40 18 7 2 51.6 .......

13 50.6 0 South Carolina l 3 5 7 12 22 20 5 Georgia l l 5 9 3 l 55.0 Florida (east coast) l 3 4 10 6 l 2 2 l 50.7 Florida (west coast) l 3 12 18 43 55 26 12 4 53.4 Mississippi 2 8 7 5 4 l 48.5 Louisiana l 7 18 25 50 55 24 3 50.0 Texas l 11 19 39 48 34 20 8 46.6 Yucatan l 5 10 33 47 42 21 6 48.4

1-11

• Table 1-5 Frequency distribution of pectoral length (percent SL) of 1249 specimens of Anchoa mitchilli by state or region (from Hildebrand, 1943).

Pectoral length (percent SL)

States 12 13 14 15 16 17 18 19 20 Massachusetts 6 26 20 4 2 Rhode Island 5 4 1 Connecticut 4 17 18 8 2 New York 3 12 26 24 6 New Jersey 1 7 21 50 27 9 1 Delaware 1 2 14 35 36 16 3 Maryland 1 7 30 30 11 1 Virginia 5 18 21 10 2 North Carolina 5 18 22 9 2 South Carolina 1 3 9 9 10 5 1 Georgia 5 7 5 1 Florida (east coast) 2 2 4 6 4 1 Florida (west coast) 3 11 38 53 20 4 Mississippi 1 1 2 6 6 2 1 Louisiana 1 8 28 49 27 6 Texas 9 38 60 38 17 4 Yucatan 4 20 51 44 8 l

I-'

I I-'

N Adult bay anchovy, Anchoa mitchilli (Valenciennes), 78 mm TL.

PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316{b) STUDY Figure 1-1

2-1 SECTION 2.0 DISTRIBUTION 2.1 TOTAL AREA The bay anchovy is found along the Atlantic and Gulf coasts, between Maine (although infrequently north of Cape Cod, MA) and the Yucatan Peninsula, Mexico (Fig. 2-1) (Burgess, 1980). It is particularly abundant in estuaries, nearshore coastal waters, and bays (Springer and Woodburn, 1960). Bay anchovy occur in clear and turbid waters and over all types of substrates (Breuer, 1963). In the middle Atlantic region, which includes the Chesapeake and Delaware bays, it is probably the most abundant and widespread fish (Hildebrand and Schroeder, 1928: deSylva et al., 1962: Wang and Kernehan, 1979).

Local Distribution Bay anchovy occur throughout Delaware Bay (se~ Section 4.2) and are seasonally abundant in the lower Delaware River to between Wilmington, DE (rkm 120) and Philadelphia, PA (rkm 150) (see Section 2.2.4) (Fig. 2-2). The species has been taken in many, and probably occurs in all, of the tidal tributaries of the Delaware Bay and lower Delaware River from the Broadkill River (rkm 2), to Reybold Creek (rkm 99)

(Smith, 1971: Walton and Patrick, 1973: Martin, 1974).

Additionally, bay anchovy occur throughout the Chesapeake and Delaware Canal (rkm 95) (Ritchie and Koo, 1973: Taylor et al., 1973: Wang, 1974: Bason et al., 1976: Keirsey et al., 1977) and the adjoining Elk River and Chesapeake Bay (Dovel, 1971).

2.2 DIFFERENTIAL DISTRIBUTION 2.2.1 Preadult Habitat Bay anchovy eggs occur throughout the brackish and saltwater portions of estuaries (Dovel, 1971: Wang and Kernehan, 1979) and in nearshore coastal waters (Swiecicki and Tatham, 1977:

Austin, 1976). During the present study, bay anchovy eggs were collected throughout Delaware Bay and the lower

2-2 Delaware River from rkm 0 to 117. Egg abundance was greatest in higher salinity waters (>20 ppt) of the lower bay (rkm 0-48) and declined upstream as salinity decreased (Section 4.2.3). A similar egg distribution was observed in the Chesapeake Bay by Dovel (1971).

Bay anchovy prolarvae and postlarvae also occur throughout the brackish and saltwater portions of estuaries (Dovel, 1971: Wang and Kernehan, 1979) and in nearshore coastal areas (Breuer, 1963: Jones et al., 1965: Swiecicki and Tatham, 1977: Berrien et al., 1978). Berrien et al. (1978) found that the density in coastal waters of the Mid-Atlantic Bight decreased rapidly with increasing distance off shore (Table 2-1: Fig. 2-3).

Within estuaries larval stages are often more abundant upstream of the region of major egg concentration. In the Delaware Estuary during the present study, prolarvae were generdlly most abundant in the upper bay (rkm 32-80):

postlarvae were typically concentrated in the upper bay-lower river region (rkm 64-117) (Section 4.2.3). Larvae have been collected in the freshwater portion of the Delaware River to near Philadelphia (rkm 142) (Himchak, 1981). Higher upstream densities of larvae relative to eggs has also been observed in Chesapeake Bay (Dovel, 1971) and the Potomac River (Lippson et al., 1979: Polgar et al.,

1979): this reportedly results from net subsurface upstream transport or migration to a low salinity nursery area (Section 3.8.1).

As with eggs and larvae, juvenile bay anchovy are taken throughout brackish and saltwaters of the estuary (Dovel, 1971: Wang and Kernehan, 1979) and in nearshore coastal waters (Swiecicki and Tatham, 1977: Berrien et al., 1978).

They have also been collected in freshwater ca. 64 km (40 miles) above the fresh-saltwater interface (Massman, 1954).

During the present study juvenile distribution patterns varied annually: concentrations could be found in the lower Delaware Bay (rkm 16-32) upstream to the lower Delaware River (rkm 80-117) (Section 4.2.3). In the lower, freshwater portion of the Delaware River juvenile bay anchovy have been taken to near Philadelphia (rkm 142)

(Himchak, 1981). In the Chesapeake Bay, Dovel (1971) reported that juveniles remain in the low salinity nursery areas until fall when they migrate downstream to deeper, more saline regions of the estuary (Section 3.8.1). This distribution has also been observed in the Potomac River by Polgar et al. ( 1979).

2-3

• Vertical Distribution Mansueti and Hardy (1967) reported that bay anchovy eggs are positively buoyant at spawning and become more demersal as development continues. Eggs have been reported as more abundant in surface than in bottom collections in Long Island Sound (Williams, 1968) and ca. 5 km offshore of Little Egg Inlet, NJ (Swiecicki and Tatham, 1977). This stratification, however, has not been observed in all estuaries. Bath et al. (unpubl. manu.) reported bay anchovy eggs more abundant near the bottom in the low salinity (0-6 ppt) region of the Hudson River during both day and night.

Swiecicki and Tatham (1977) reported no difference between surface and bottom egg densities in Great Bay-Mullica River, NJ.

Analysis of paired-design data collected near Artificial Island, Delaware River, during June through August, 1982, in the present study failed to detect a significant difference in egg densities between upper and lower halves of the water column (T = -1.9, p > 0.05; data is presented in Section 6.1). Factorial ~esign analysis of variance with egg density data collected in the same area during July through August, 1974, resulted in significant high order interactions indicating that generalizations concerning depth distribution must be qualified by time of year, time of day, and sample location (Table 2-2).

Wang and Kernehan (1979) reported that prolarvae are epibenthic for ca. 24 hrs after hatching and then become pelagic. As with eggs, however, studies indicate no consistent regional or local pattern of vertical distribution for bay anchovy (pro- and post-) larvae.

Larvae were more abundant in surface than bottom waters of Chesapeake Bay (Dovel, 1971). Conversely, larvae were more abundant in mid- and/or bottom waters in the Mystic River estuary (Pearcy and Richards, 1962), in Long Island Sound (Richards, 1959) and in the Hudson River at Indian Point (Lauer et al., 1974). Bath et al. (unpubl. manu.) reported finding prolarvae more abundant at the bottom but no depth preference by postlarvae in the low salinity (0-6 ppt) region of the Hudson River. Swiecicki and Tatham (1977) reported that in Great Bay and Mullica River, NJ, the vertical distribution pattern varied; however, larvae did tend to aggregate at some particular level in the water column (e.g., surface, mid-depth or bottom). Kernehan et al. (1978) reported that larvae in the C & D Canal exhibited a diel difference in vertical distribution; they were more abundant at the surface during the day and at the bottom during night. Neither Lauer et al. (1974) nor Bath et al *

(unpubl. manu.) reported diel differences in vertical

2-4 distribution occurring in the Hudson River. Analysis of present study data collected during June through August, 1982 indicated no significant difference (T = 1.7; p > 0.05) in densities of larvae between the upper and lower halves of the water column in the Delaware River near Artificial Island (rkm 80). As with eggs, factorial analysis of variance resulted in high-order interactions (Table 2-3) indicating that statements regarding vertical distribution of larvae in this region must be qualified by date, time and location.

Vertical distribution of juvenile bay anchovy apparently is as variable as for egg and larval stages. Kaufman et al.

(1980) reported finding juveniles more abundant in surface than bottom collections. Kernehan et al. (1978) reported that juveniles exhibited a diel difference in vertical distribution in the C & D Canal; they were more abundant in surface waters during day and in mid- or bottom waters at night.

2.2.2 Adults Habitat Bay anchovy are distributed throughout estuarine and coastal waters in habitats including muddy coves (Hildebr~nd and Schroeder, 1928), grassy areas (Hildebrand, 1963; Orth and Heck, 1980), off sandy beaches (Reid, 1954; Kilby, 1955), in the surf zone (Cupka, 1972), over sand and silt bottoms (Gallaway and Strawn, 1974) and near the mouths of rivers (Bigelow and Schroeder, 1953; Kaufman et al., 1980). In coastal waters adults are more abundant nearshore than off shore but have been collected in waters of 27-36 m depth (Hildebrand, 1963).

In the Delaware River Estuary adult bay anchovy are typically found throughout the region (rkm 0-117) (see Section 4.2). In the spring, adults disperse from deeper overwintering areas in, and possibly offshore of, the lower Delaware Bay to shallow areas throughout the estuary to spawn (Hildebrand and Schroeder, 1928; Stevenson, 1958). Individuals have been reported in the upper tidal-freshwater reach of the Delaware River as far as Burlington, NJ (rkm 189) and Trenton, NJ (rkm 212) (Anselmini, 1974; IA, 1979). Adult bay anchovy are seasonally abundant in fresh waters just north of Tinicum Island (rkm 142) (Himchak, 1981), in brackish waters near Edgemoor, DE (rkm 114) (Herrig, 1976), in low salinity tidal tributaries near Artificial Island (Smith, 1971) (Fig. 2-4),

and throughout the Chesapeake and Delaware Canal (rkm 96)

(Shirey et al., 1978). They are also found in contiguous

2-5

• ocean waters near shore and in inlets and bays along the Delaware and New Jersey coastlines (deSylva et al., 1962; Derickson and Priee, 1973; Milstein et al., 1977~ Berrien et al., 1978) (Fig. 2-5). In the fall many adults apparently move down-estuary to overwinter in the lower bay and near-shore ocean waters.

Vertical Distribution In the Delaware River estuary during the present study, bay anchovy were taken by fixed frame net (surface and mid-depth) and 4.9 m otter trawl (bottom and shallow strata) on three vertical profile transects located baywide as follows:

1) across the lower river (rkm 80) between Salem Station and the Appoquinimink River, DE; 2) across the middle bay between Kitts Hummock, DE (ca. rkm 40) and Egg Island Point, NJ (ca. rkm 35) and 3) across the lower bay between Slaughter Beach, DE (ca. rkm 15) and Miami Beach, NJ (ca.

rkm 12). Bimonthly summaries of vertical distribution data collected across the lower-river region during May through November suggest that fish, while found throughout the water column, were somewhat more abundant near surface and mid-depth areas as well as in the shallows (< 3 m depth) near the western shore (Figs. 2-6 through 2-8). In the middle bay most bay anchovy collected during June through October were near bottom in the deeper central channel areas.

During July they were also abundant near bottom toward the western shore (Figs. 2-9 through 2-11). In the lower bay, most were taken in the shallows (< 8 m depth) near shore lines (Fig. 2-12). Surface aggregations of adult bay anchovy have been observed in the upper Chesapeake Bay by Kaufman et al., (1980).

2.3 DETERMINANT~ OF DISTRIBUTION CHANGE U.S. EPA (1983) reported that anoxic conditions which form in the mid-Chesapeake Bay annually between May and October have contributed to the decline of the bay anchovy population in the Maryland portion of the bay. These conditions are created by natural hydrographic conditions and anthropogenic inputs and ~he affected area has increased between 1958 and 1981 resulting in attendent losses of bay anchovy feeding and spawning habitats .

2-6 2.4 HYBRIDIZATION 2.4.1 'Hybrids Neither natural nor artificially-induced hybridization of bay anchovy was reported in the review by Schwartz (1972; 1981).

2-7 Table 2-1 Offshore density of bay anchovy pro- and postlarvae collected June 17-29, 1966 between Martha's Vineyard, MA and Cape.Lookout, NC.

Sampling station distance offshore increases from left to right.

(Data source - Berrien et al., 1978).

Transect extending 3 offshore from: Density (n/lOOm )

Cape Henlopen, DE 197.2 67.3 5.5 0.0 0.0 0.0 o.o Ocean City, MD 0.7 O.Q,,, 0.0 o.o o.o o.o Wachapreague, VA 386.7 103. 8 13. 2 0.0 o.o o.o o.o Cape Henry, VA 49.8 258.3 24.7 11.5 o.o 0.3 0.0 Duck, NC o.o 5.9 2.8 o.o o.o 0.0 0.0 Oregon Jnlet, NC 2.8 4.8 o.o 0.0 0.0 o.o

• (Increasing distance offshore)

Table 2-2 3

Factorial analysis of variance of bay anchovy eggs (n/m ) taken during daylight in surface and bottom collections at four stations ih the Delaware River near Artificial Island between July 9 and August 20, 1974.

Sum of Mean Significance Source of Variation Squares DF Square F of F Main Effects 423559936.0 7 60508560.0 58.5 0.000 Date '115591984.0 2 57795984.0 55.9 0.000 Station 178801648.0 3 59600544.0 57.6 o.ooo Time 585456.2 1 585456.2 0.6 0.456 Depth 128580992.0 1 128580992.0 124.3 0.000 2-Way Interactions 314746368.0 17 18514430.0 17.9 0.000 Date Station 118792688. 0 6 19798768.0 19.1 o.ooo Date Time 2411454.0 2 1205727.0 1.2 0.320 Date Depth 76732080.0 2 38366032.0 37.1 0.000 Station Time 5233373.0 3 1744457.0 1. 7 0.182 N

Station Depth 111563104.0 3 37187696.0 35.9 0.000 I Time Depth 13560.2 1 13560.2 o.o 0.909 CXl 3-Way Interactions 155606016.0 17 9153295.0 8.8 0.000 Date Station Time 29691472.0 6 4948578.0 4.8 0.001 Date *Station Depth 116967376.0 6 19494560.0 18.8 o.ooo Date Time Depth 7542771.0 2 3771385.0 3.6 0.034 Station Time Depth 1404271.0 3 468090.3 0.4 o. 717 4-Way Interactions 31079168.0 6 5179861.0 5.0 0.000 Date Station Time Depth 31079040.0 6 5179840.0 5.0 0.000 Explained 924991488.0 47 19680656.0 19.0 o.ooo Residual 49654784.0 48 1034474.0 Total 974646272.0 95 10259434.0

• Table 2-3 3

Factorial analysis of variance of bay anchovy larvae (n/m ) taken during daylight in surface and bottom collections at four stations in the Delaware River near Artificial Island between July 9 and August 20, 1974.

Sum of Mean Significance Source of Variation Squares DF Square F of F Main Effects 11864459.0 7 1694922.0 46.3 0.000 Date 5277049 .o 2 2638524.0 72.0 0.000 Station 4077241.0 3 1359080.0 37.1 o.ooo Time 1930178.0 1 1930178.0 52.7 0.000 Depth 579989.5 1 579989.5 15.8 0.000 2-Way Interactions 43657472.0 17 2568086.0 70.1 o.ooo Date Station 17166176.0 6 2861029.0 78.1 0.000 Date Time 3685022.0 2 1842511.0 50.3 o.ooo Date Depth 5634354.0 2 2817177 .o 76.9 o.ooo Station Time 5151271.0 3 1717090.0 46.9 0.000 N Station Depth 6956026.0 3 2318675 .* 0 63.3 0.000 I

\.D Time Depth 5064623.0 1 5064623.0 138.3 o.ooo 3-Way Interactions 29712768.0 17 1747809.0 47.7 0.000 Date Station Time 10073888.0 6 1678981.0 45.9 0.000 Date Station Depth 8911992.0 6 1485332.0 40.6 0.000 Date Time Depth 5401124 .o 2 2700562.0 73.8 o.ooo Station Time Depth 5325742.0 3 1775247 .o 48.5 0.000 4-Way Interactions 13415280.0 6 2235880.0 61.1 o.ooo Date Station Time Depth 13415280.0 6 2235880.0 61.1 0.000 Explained 98649984.0 47 2098935.0 57.3 o.ooo Residual 1757408.0 48 36612.7 Total 100407392.0 95 1056919.0

2-10 BAY ANCHOVY 50°N-45°N-40°N-35°N-30°N-

~oN-20°N-o*.

15°N,~

100°W 95°W I

70°W I

65°W I

60°W I

55°W Distribution of bay anchovy along Atlantic PUBLIC SERVICE ELECTRIC AND GAS COMPANY and Gulf coasts. Arrow indicates Delaware SALEM 3l6(b) STUDY Bay.

• 1------------~F~i-g-u~r-e~z--~l------...,--------------1

2-11 PENNSYLVANIA"** .

N 10 20 30 km ISLAND

- .. \:J(+-~ ATLANTIC OCEAN DELAWARE HENLOPEN Indian River Inlet Delaware River Estuary from Cape May PUBLIC SE~VICE ELECTRIC AND CAS COMPA.'n' to Trenton, NJ.

SALEM 316(b) STt.1>Y Figure 2-2

2-12 41° PA 83 m

' \, MD 39° VA log 10 density (n/100 m3) i:-:,:.::-:*j -1.0

~ 0

~

~+

~ 1.0

&t:S~ +2.0 NC km 0 100 75° 73° 71° Continental shelf distribution of bay PUBLIC SERVICE ELECTRIC AND GAS COMPA.."rl anchovy larvae in the Mid-Atlantic Bight.

SALEM 316(b) STUDY (Data source: Berrien et al., 1978).

Figure 2-3

2-13 DELAWARE JERSEY N

km Delaware River system from Smyrna River, PUBLIC SD.VICE !L!CTUC .Alm Cl.S COMPANY DE to Pea Patch Island, DE.

SALEK 316(b) STUDY Figure* l-4

2-14 NOV-APR MAY-OCT

• MA

.\

NY PA VA VA NC NC km 0 100 Seasonal offshore limit of bay anchovy in PUBLIC SERVICE ELECTRIC AND GAS COMPANY the Mid-Atlantic Bight, Dec. 1965-Dec. 1966 SALEM 3l6(b) STUDY Data source: Berrien et al., 1978.

Figure 2-5

Appoquinimink River

• Salem 72 37 51 157 3

30 10 21 31 6

15 8. 14 16 C./) N

~ I w I-'

1- Ul w 9

~

12 May-June, 1980 Number of bay anchovy (8 collections) taken on a vertical profile PUBLIC SERVICE ELECTRIC Al;J) GAS COMPANY transect across the Delaware River (rkm 80) between Salem and the Appoquinimink River, DE, May-June, 1980.

SALEM 316(b) STUDY Figure 2-6

Appoquinimink River 230 102 49 106" 46 3

249 328 179 285 338 6

Number of bay anchovy (6 collections) taken on a vertical profile PUBLIC SERVICE ELECTRIC Ah"D GAS COMPANY transect across the Delaware River (rkm 80) between Salem and the Appoquinimink R~ver, DE, July~August, 1980.

SALEK 316(b) STUDY Figure 2-7

Appoquinimink Salem River 62 53 32 3

22 37 34 66 6

7 7 11 6 C/)

N

~ I w

w I-'

-....)

9

~

12 October-November, 1979 and 1980 15 Number of bay anchovy (7 collections) taken on a vertical profile transect across the Delaware River (rkm 80) between Salem and the PUBLIC SERVICE ELECTRIC A?ill GAS COMPANY Appoquinimink River, DE, October-November, 1979 and 1980 combined.

SALEK ll6(b) STUDY Figure 2-8

New Jersey 36 6 1 0 1 3

3 0 6 15 ci'> N

~ I w .......

,..,_ 9- 00 w

~

12

~

• . June, 1980 15 ..

Number of bay anchovy (4 collections) taken on a vertical profile PUBLIC SERVICE !L!CTRIC Al-1> GAS COMPANY transect across the Delaware Bay between Kitts Hummock, DE (ca. rkm 40) and Egg Island Point, NJ (ca. rkm 35), June 1980.

BAL!H 316(b) STUDY Figure 2-9

• Delaware New Jersey 3

6 c.n

~ N w I 1- 9 I-'

w U)

~

12 July-August, 1980 15 ..

Number of bay anchovy (6 collections) taken on a vertical profile PUBLIC SERVICE ELECTRIC Alill GAS COMl'ANY transect across the Delaware Bay between Kitts Hummock, DE (ca. rkm 40)

SALEK 316(b) STIJDY and Egg Island Point, NJ (ca. rkm 35), July-August, 1980.

- Figure 2'-10

New Jersey 3

3 405 6

I./')

~

w I- 9

.. N N

0 I

w

~

12 15 ..

Number of bay anchovy (2 collections) taken on a vertical profile transect PUBLIC SERVICE ELECTRIC Al'1> GAS COMPANY across the Delaware River between Kitts Hummock, DE (ca. rkm 40) and Egg Island Point, NJ (ca. rkm 35), October, 1980.

SALEM 316(b) STUDY Figure 2-11

• Delaware 0 0 0 13 0 6 0

0 12 V>

IX w 0 I-w

~

18 N I

N I-'

June-August, 1980 24 Numb~r of bay-anchovy (12 collections) taken on a vertical profile PUBLIC S!RVIC! !Ll!CTRIC At.1l GAS COMPANY transect across the Delaware Bay between Slaughter Beach, DE (ca. rkm 15) and Miami Beach, NJ (ca. rkm 12, June-August, 1980.

SALl!H 316(b) STUDY Figure 2-12

3-1 SECTION 3.0 BIONOMICS AND LIFE HISTORY 3.1 REPRODUCTION 3.1.1 Sexuality Bay anchovy are dioecious. However, there are no external accessory sexual organs or distinguishing external sexual characteristics.

3.1.2 Maturity In studies conducted in Texas coastal waters and bays, Gunter (1945) found that the smallest male and female bay anchovy with developing gonads were 37 and 36 mm TL, respectively. In studies in Delaware Bay, Steve~son (1958) found that during May-July all specimens (not reported by sex) larger than 40 mm SL and 55 percent of those 35-39 mm SL were sexually mature (Table 3-1). Results were similar for specimens examined in collections from Oyster Creek and Forked River, NJ (Kurtz, 1978).

3.1.3 Mating Although it appears that the mating behavior of bay anchovy has not been described, it is likely similar to that of engraulids in general. Anchovies are typically school spawners with pairing or polyandry within schools (Breder and Rosen, 1966).

3.1.4 Fertilization Fertilization is external.

3.1.5 Gonads Stevenson (1958) described the developing ovary as a pale yellow to white structure with rounded edges and similar in

3-2 appearance to a "drawn-out bag": he described the testis as a pale yellow to white leaf-life structure which is thin along the edge and thicker in the center. Description of the stages of development of bay anchovy gonads is presented in Table 3-2.

The annual cycle of gonadal maturity was described for specimens taken in Barnegat Bay, NJ by Kurtz (1978). All specimens examined from April through June were in some state of maturity. Specimens with enlarged gonads were first taken in April: numbers increased substantially in May and they were taken through August. Relatively few (38 of 1,670 specimens examined) ripe females were collected. They occurred during June through August, with 84 percent taken in July. Ripe males were collected from May through August and were most abundant in June. Gonads of both sexes examined during September through December were either immature or at rest.

Stevenson (1958) enumerated ovarian eggs (> 0.05 mm in diameter) in 1/25 of the right ovary of 15-specimens (51-75 mm SL) and determined the difference in weight bet\Jeen the left and right ovaries of 17 specimens (54-73 mm SL)'. Assuming that a given increase in ovarian weight reflects a corresponding increase in the number of ovarian eggs, the weight relationship between the two ovaries can be used to estimate the number of eggs in the unenumerated ovary. Using Stevenson's data, the ratio of left to right ovary weight was found to be independent of standard length (Fig. 3-1) since the slope of the regression line was not significantly different (p > 0.05) from zero.

Therefore, the overall mean percent of left to right ovary weight (162.3) was used to calculate the number of eggs in the left ovary. The resulting relationship between standard length and total number of eggs calculated for both ovaries is presented in Figure 3-2. The regression equation for predicting the production of ova (> 0.05 mm in diameter) is:

1 14369 2 F = 307.031SL * (r =0.390: SE=0.246) where:

F = number of ovarian eggs (> 0.05 mm)

SL = standard length in millimeters (mm)

Perschbacher and Schwartz (unpubl. manu.) investigated the relationship between fecundity and standard length (SL) in 202 specimens of bay anchovy from North Carolina. Since they counted only maturing, yolked ova, distinguished by their opacity and size (> 0.5 mm), the estimates represent batch fecundity (F), i.e., the number released during a single spawn. For specimens 45-78 mm SL they described the following linea.r relationship:

F = -5977.89 + 128.21SL (r = 0.87)

3-3 A 59 mm SL bay anchovy, the average size female encountered during their study, was predicted to contain 1,586 eggs.

They noted that a 50 mm SL female would produce approximately 400 ova while Stevenson's (1958) data for a 50 mm SL Delaware Bay individual would suggest over 20,000 ova.

They pointed out that, while their estimates were for mature ova, Stevenson included undeveloped eggs by counting all eggs > 0.05 mm in diameter. It should be noted that Stevenson suggested that only 7 percent of his count was likely spawned. Therefore, batch fecundity estimate for a 50 mm SL fish would be approximately 1,900 eggs, yielding a closer agreement between the two studies~

Perschbacher and Schwartz (unpubl. manu.) noted the spawning frequency of bay anchovy was problematic. They stated that a protracted spawning period would suggest fractional spawning but they could not evidence continuous recruitment in North Carolina. Most spawning activity appeared restricted to May-June. They stated that "until it is shown that yolked oocytes destined to be spawned, are added to the ovary during a spawning season", their estimates "should be interpreted as representing annual fecundity".

Workers studying the Pacific coast northern anchovy, Engraulis mordax, one of the few anchovies whose reproduction has been investigated in detail, have concluded that fractional spawning does occur in that species.

MacGregor (1968) noted that despite spawning over most of the year, there was a definite annual peak in spawning. He noted that nearly all mature females in the population contained well-developed eggs or were recently spent in the early part of the year, yet spawning continued throughout the rest of the year. Allowing that some individuals matured during the season, he concluded that females spawned an average of 2-5 times per year. Brewer (1978) believed that the number of spawnings per year and the number of eggs spawned was variable depending on environmental conditions.

Multiple spawnings were possible as long as temperatures were not restrictive. Hunter and Leong (1981) investigated maturation rates of northern anchovy in both field and laboratory studies. Calculations based on the incidence of 24 hr old postovulatory follicles in field collected individuals indicated that each mature female spawned an average 15 times between February-September and approximately 5 times between October-January. Their laboratory studies indicated that females were capable of maturing a batch of eggs at weekly intervals. Additionally, caloric values indicated that while the caloric equivalent of only two spawning batches are present in a mature ovary at any given time, the caloric cost of an additional ca. 13 spawnings could be supplied by fat reserves

• 3-4 From the occurrence of the protracted spawning period of bay anchovy in Delaware Bay (Sections 3.1.6; 4.2.3), often with multiple peaks, and the evidence for serially maturing batches of ova in northern anchovy, it would seem likely that bay anchovy females, at least in the Delaware Estuary, spawn more than once per season.

3.1.6 Spawning Spawning Times and Location The spawning season varies with latitude; shorter in the northern portion of its range, e.g. June-August for Narragansett Bay, RI, and longer in the southern portion, e.g., lasting throughout moot of the year in Biscayne Bay, FL (Table 3-3). From North Carolina coastal waters northward, peak spawning activity generally occurs between late May and mid-August. During the present study, temporal occurrence of spawning in the lower Delaware R~ver and Bay was defined on the basis of eggs taken in field samples during 1979 through 1982 and expressed as proportion of total eggs per week (Table 3-4; Fig. 3-3). The spawning period was typically protracted, May through Mid-August, with two peaks - usually in late May and mid-July. Spawning primarily occurred at water temperature 13-28°C with peak activity occurring at temperatures greater than 17°C.

Similar protracted spawning periods and peak activity between May and July were reported for Delaware Bay by Stevenson (1958) and Wang and Kernehan (1979), and for the upper Chesapeake Bay by Dovel (1971) (Table 3-3).

Bay anchovy spawn throughout the present study area (rkm 0-117) at salinities 0-32.0 ppt, however, the principle area, as inferred from regional egg distributions (Section 4.2.3),

is between rkm 16 and 48 at salinities greater than ca. 20 ppt. Present study baywide egg viability data (Figs. 3-5 through 3-8) suggest that greatest viability generally occurs in the region (rkm 0-60) encompassing this area.

Diel Spawning Patterns Observations of eggs in plankton collections taken at Beaufort, NC indicated that bay anchovy typically spawn in the early evening from 1800 to 2100 hrs (Kuntz, 1914; Hildebrand and Cable, 1930). Spawning began in the evening but continued throughout the night in Peconic Bays, New York (Ferraro, 1980) and in the ocean and bays near Little Egg

3-5 Inlet, NJ (Milstein et al., 1977). In the Delaware River near Artificial Island (rkm 64-97), it may be inferred from egg viability data that spawning also occurs primarily during late evening or night. During 1974-77 viability of eggs collected at approximately 1800-2400 hrs was consistently greater than those collected during daylight hours (Table 3-5). Since hatching time is approximately 24 hrs and deaths are cumulative, greatest viability should be closest to the spawning time.

Birthdate Designation Bay anchovy eggs were collected during the Present Study as early as the May 5-7 collection period and were common or even abundant in samples taken during mid-May; therefore, a birthdate of May l was chosen (Fig. 3-3).

3.1.7 Spawn Bay anchovy eggs are slightly oval*or elongate to

• occasionally spherical in shape (Kuntz, 1914; Hildebrand, 1963). The eggs contain no oil globules and when viable are highly transparent. The yolk material is segmented into large masses and the perivitelline space is narrow, becoming larger in eggs from estuarine waters (Lippson and Moran, 1974). Wang and Kernehan (1979) indicated that the perivitelline space is wide, 0.4-0.5 mm, relative to the overall diameter of the egg, 0.80-1.19 x 0.76-1.09 mm.

Wheatland (1956) noted that the mean size of bay anchovy eggs in Long Island Sound collections progressively decreased from June through August. She suggested one or more of the following as possible causes of the size decrease: duration of preservation (eggs were measured after all collections were taken), possible correlation of egg shape and structure with environmental factors such as temperature and/or salinity, and the size and/or metabolism of the parent fish. Dovel (1971) found that mean values (n=30) of both the major and the minor axis varied with salinity as follows:

Salinity Major axis (mm) Minor axis (mm)

( ppt) Range Mean Range Mean r 5 0.92-1.33 1.119 0.86-1.26 1.035 10 0. 86-1. 36 1.045 0.83-1.15 0.978 15 0.84-1.12 0.968 0. 65-1. 09 0.896 20 0.86-1.11 0.949 0.84-0.95 0.887 t

l

3-6 3.2 3.2.1 EMBRYONIC PHASE Development, Duration The following description of embryonic development was summarized from Kuntz (1914). Cleavage begins following formation of the blastodisc (2-cell stage). About 5 hr after fertilization, the egg is in an advanced stage of cleavage (Fig. 3-4A, morula). Cleavage continues with great regularity, the embryonic shield begins to form, and the germ ring is distinct (gastrula). The blastoderm continues to grow around the yolk until two-thirds is enclosed (late gastrula). About 10 hr after fertilization the blastopore is nearly closed (Fig. 3-4B, early embryo); soon after closure, Kupffer's vesicle arises and the embryo extends more than two-thirds around the yolk (Fig. 3-4C). Duration of incubation is about 24 hrs at ambient temperatures of 27 to 28°C.

3.2.2 Environmental Conditions, Hardiness Temperature There is little information in the literature on the effects of temperature on bay anchovy eggs. The wide range of

,temperature at which eggs have been collected (12-31°C; Table 3-3) indicates the eurythermal nature of the species and suggests some tolerance of eggs to temperature.

Successful incubation in the laboratory of naturally fertilized eggs was observed in the present study at temperatures from 17.0 to 25.5°C for eggs collected in the Delaware Bay (PSE&G, 1980c), and from 27 to 30°C for eggs collected near the Florida Current (Saksena and Houde, 1972).

Secondary or plume entrainment studies conducted during the present study indicated that 76 to 100 percent of the bay anchovy eggs acclimated to 27.0°C (at salinities of ca. 12 ppt) hatched following exposure to delta T's ranging from 1.5 to 7.0°C for 0.5 to 4.0 hrs (PSE&G, 1978b). No significant difference (p<0.05) in hatching success between experimental treatments and controls was observed.

Salinity Bay anchovy eggs are distributed over a wide salinity range (Table 3-3). During the present study eggs were taken in

3-7

• Delaware Bay and River at salinities of 0-32 ppt. However, Wang and Kernehan (1979) stated egg viability at salinities below 8 ppt was low, possibly because of increased osmotic stress. Although present-study egg viability data suggest considerable temporal and spatial variability, a weak relationship with salinity is apparent. Plots of average egg viability against distance from the bay mouth (Fig. 3-5

.through 3-8) and salinity (Fig. 3-9 through 3-12) indicate highest viability generally at highest salinities, typically at rkm 0-40, and that it decreases in an up-estuary direction.

Successful incubation in the laboratory was reported at salinities between 11-18 ppt with eggs collected in Delaware Bay (PSE&G, 1980c) and between 33.7 and 36.4 ppt with eggs collected near the Florida Current (Saksena and Houde, 1972).

3.3 LARVAL PHASE 3.3.1 Development, Duration Larval development is desc~ibed in detail by Kuntz (1914) and is summarized below. Hatching occurs in the early evening about 24 hr after spawning. At the time of hatching, the prolarvae (yolk-sac) is 1.8-2.0 mm TL and the body is flattened and slender. The finfold is continuous and narrower than body depth. The yolk-sac is elongated and tapers to a point posteriorly; the head is deflected over the yolk-sac (Fig. 3-13A). At 2.6-2.8 mm TL (ca. 12 hr after hatching), the head is no longer deflected over the remaining yolk mass. According to Houde (1974), yolk absorption is rapid during the first 20 hr and decreases thereafter, all yolk being absorbed within 50 hr of hatching (24-32°C). This is considerably longer than the 15-18 hr period (ca. 27°C) required for complete yolk absorption reported by Kuntz (1914). The mouth begins to develop long maxillaries and a long, narrow mandible characteristic of anchovies. The anterior portion of the head does not extend beyond the mouth (~untz, 1914). Eye pigmentation occurs ca.

20-36 hr after hatching (Houde, 1974), and the mouth appears functional at about 2.9 mm TL (ca. 36 hr) (Kuntz, 1914).

Transformation to the postlarval stage occurs when eye pigmentation is complete and the mouth is functional (Fig. 3-13B) The postlarval finfold remains continuous although its relative depth has decreased. At about 5 mm TL, the finfold begins to differentiate into the dorsal and anal fins

• (Kuntz, 1914). Muscular rings develop along the hindgut

3-8 giving the appearance of a convoluted intestine. At 11 mm TL, the dorsal and anal fins are definitely outlined and, in some instances, the adult complement of fin rays is present (Fig. 3-13C) (Jones et al., 1978). The fish remain relatively transparent through this stage although a few pigmented areas occur along the ventral margin of the body in the thoracic region and the base of the anal fin.

Transparency decreases as growth continues but pigmentation remains restricted to the ventral area (Kuntz, 1914).

Larval growth rate for laboratory-reared specimens (24-28°C) ranged between 0.45 and 0.68 mm/day (Houde, 1974: 1977) (see Section 3.7.3). Therefore, larvae ca. 20 mm TL may typically be 26-38 days old.

Transformation to the juvenile stage occurs when the gut is completely contained within the body cavity. This transformation may begin at 15.5 mm SL and is complete by 22.5 mm SL (Jones et al., 1978).

3.3.2 Environmental Conditions, Hardiness Temperature Houde (1974) studied the effects of temperature on bay anchovy larvae from time of hatching until eye pigmentation and time of starvation (Table 3-6). Time from hatching until eye pigmentation represents the period when larvae presumably can gain nourishment only from their yolk-sac reserves and not from exogenous sources. Starvation time is the period between the completion of eye pigmentation and death by starvation: this is the critical period when larvae must search for food and initiate feeding. Houde indicated that the duration of these periods may be determined with the following regression equations:

2

1) Y = 191.48 - 10.85X + 0.1BX (SE = 2.21) where X = temperature Y = hours between hatching and eye pigmentation.

2) Y = 266.689 - 5.870X (SE = 3.504) where X

Y

=

=

temperature hours to starvation after hatching. .Il

3-9

• Additionally, an inverse relationship between temperature and yolk remaining at time of eye pigmentation suggested that at higher temperatures the need for food is more immediate (Houde, 1974).

Temperature tolerance studies evaluating the effects of rapid temperature increase followed by gradual decrease associated with secondary (plume) entrainment were conducted on bay anchovy larvae (2-3 mm TL) during the present study (Meldrim, 1979). During each test, specimens were acclimated to a given temperature from 17.5-25.0°C, tested at a predesigned combination of delta T temperature (2.0-16.50C) and exposure duration (1-240 min), and then observed through 24 hrs to determine percentage mortality. Results of tests with control mortality < 20 percent (Table 3-7; Figs. 3-14 through 3-20) indicate relatively high tolerance (6-17 percent mortality) to temperatures as high as 35°C at exposures of 1-min and 5-min.

3.3.3 Competitors Mihursky et al. (1982) suggested that larval bay anchovy and herring (Alosa spp.) were ecological equivalents but that differences in spawning times and salinity preferences reduced any competition between them.

3.4 JUVENILE PHASE 3.4.1 Development, Duration The snout develops typical adult p~ojection at ca. 20-25 mm (Hildebrand, 1963); the maxillary extends posteriorly, nearly reaching the operculum. The juvenile body is more slender than the adult (Wang and Kernehan, 1979). Juveniles remain relatively transparent until they mature (Fig. 3-13D). Chromatophores occur in series along the ventral surface, some along the posterior two-thirds of the mid-lateral row and scattered on the dorsolateral surface (Jones et al./ 1978)0 The adult appearance is attained at about 30 mm (Lippson and Moran, 1974) while actual transition to adult is attained at sexual maturity (see Section 3.1.2).

3-10 3.4.2 Environmental Conditions and Hardiness Heat shock, cold shock and salinity tolerance data are reported in Section 3.5.2, Environmental Conditions and Hardiness - Adult Phase. Juveniles were tested with adult specimens and results were not presented by lifestage or size range (PSE&G, 1980c).

Chemical Tolerance Bay anchovy juveniles in a small (2-3 ha) marine impoundment in Tampa Bay, FL, were described as "highly sensitive" to Antimycin A, a fish toxicant, by Finucane (1969). He observed signs of distress shortly after exposure to 7 ppb of the chemical and collected nine dead juveniles, ranging from 21-32 mm SL, within 2.5 days after exposure.

3.4.4 Predators Sheridan (1979) reported that juvenile bay anchovy dominated the diet of the sand seatrout (Cynoscion arenarus) in Apalachicola Bay, FL.

3.5 ADULT PHASE 3.5.1 Longevity Length-frequency of fish collected in the Indian River, DE l

indicated that bay anchovy exhibiting a modal length of 80 to 90 mm TL during the summer months had lived 2+ years (EA, 1976). Otoiith analysis during the present study indicated that a few specimens had attained an age of 3+ years (see Section 3.7.3).

3.5.2 Environmental Conditions, Hardiness 1 Suspended Sediments Sherk et al. (1975) reported significant mortality of bay anchovy in static bioassay tests using suspensions of

.J

3-11

• fuller's earth. These natural solids are similar in particle size to those found in estuarine waters during floods or coincident with dredging or spoil disposal activities. Suspended concentrations resulting in 10, 50, and 90 percent mortality after 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> were 2.31, 4.71, and 9.60 g/l, respectively.

Heat Shock Terpin et al. (1977) conducted heat shock studies with adult bay anchovy (48-81 mm TL) acclimated to temperatures of l0-210C, salinities of 27-29 ppt and held at t~mperatures elevated by as much as 17°C for up to 48 hrs. Results indicated 0-40 percent mortality for delta T's of 0-7°C and 60-100 percent mortalities for delta T's of 8-l7°C.

However, the authors reported that the results may be biased because of mortalities in the control and low temperature test groups due to abrasions caused by erratic swimming hehavior.

Heat shock studies were conducted during the present study with juvenile and adult specimens (20-70 mm TL) acclimated to 10-27°C at salinities of 3-12 ppt: specimens were then held at temperatures elevated by 5-20°C for up to 48 hrs (PSE&G, 1978b). The 48 hr median lethal temperature (LT )

50 for fish acclimated at 19.5 or 24°C was about 29°C. As acclimation temperatures approached the upper lethal temperature, ca. 32°C, smaller delta T's were tolerated (Fig. 3-21).

EA (1978) reported 24 and 93 hr incipient lethal temperatures (LT ) of 32.4 and 33°C, respectively, for juvenile bay anchovy 0

acclimated to 24°C and 8 ppt.

Cold Shock Cold shock studies have beBn conducted with juvenile and adult bay anchovy (35-93 mm TL) acclimated to 15-22°C and 26-30 ppt, and then held at temperatures decreased by as much as l5°C for up to 48 hrs, with latent observation

(. periods up to 168 hrs (Wyllie et al., 1976: Terpin et al.,

1977). Results indicated little or no mortality for temperature decreases up to 7.0°C but 60 to 100 percent mortality for temperature decreases of 8-15°C.

r l

3-12 Studies were conducted during the present study with juvenile and adult specimens (20-85 mm TL) acclimated to 5-290C and 4-11 ppt and then held at temperatures decreased by 2 to 19°C for up to 48 hrs (PSE&G, 1978b). The 96 hr LT (lower lethal tolerance limit) for fish acclimated to 50 25°C was 15°C; for fish acclimated to 10°C it was 6°C.

These.and additional studies (Meldrim, 1979) indicated greater tolerance to cold shock at higher acclimation temperatures (Fig. 3-22).

Salinity Tolerance Salinity tolerance studies have been conducted with juvenile and adult bay anchovy (ca. 24-79 mm TL) acclimated to temperatures of 10.0-28.5°C; salinities from 5 to 15 ppt and held at salinities between 0.0 and 4.0 ppt (PSE&G, 1978b; Present Study). Results indicate that many specimens could survive sudden decreases in salinity to 1.0 ppt (Fig. 3-23).

Over time, bay anchovy can acclimate to freshwater. PSE&G (1978b) reported specimens collected from freshwater spillpools in late summer while Ansel~ini (1974) and PSE&G (1979b) reported specimens taken in the freshwater portions of the Delaware River to Trenton, NJ (rkm 212).

• 3.5.3 Competitors Burbidge (1974) described competition for food between juvenile blueback herring (A. aestivalis) and bay anchovy in the James River. McFadden et al. (1978) reported potential competition of bay anchovy with juvenile alewife (A.

pseudoharengus) and white perch (Marone americana)-because of similar diurnal activity and diets. Sheridan (1978) reported that sand seatrout (Cynoscion arenarius) enter the Apalachicola estuary in competition with anchovies for calanoid copepods and mysids; however, at a relatively small size seatrout switch diets and consume their former competitors.

3.5.4 Predators The bay anchovy is extensively utilized by predatory fish and waterfowl (Hildebrand, 1963; Dovel, 1971) and is listed as a key prey species in Long Island Sound (Richards, 1976),

3-13

• the Delaware Estuary (deSylva et al., 1962: Meadows, 1976),

and Chesapeake Bay (Hollis, 1952). Bay anchovy was the most abundant fish by volume in the stomachs of 200-300 mm TL summer flounder (Paralichthys dentatus) taken near Little Egg Inlet, New Jersey (Bieder, 1976). Along with Atlantic silversides (Menidia menidia) they occurred more often than other species in the stomachs of predatory fishes near Beaufort, NC (Hildebrand and Cable, 1930). Within the northeast region of the Gulf of Mexico they were consumed by spotted seatrout (Cynoscion nebulosus) and sand seatrout (C.

arenarus) (Vick, 1964). Frequency of occurrence of bay -

anchovy in stomachs of some other predatory fishes is listed in Table 3-8.

3.6 PARASITES, DISEASES, INJURIES, ABNORMALITIES The most frequently reported parasite of bay anchovy is Lernaeenicus spp., a parasitic copepod. Swiecicki (1974) reported heavy infestations of L. radiatus on bay anchovy during the summer and fall in the Little Egg Inlet, NJ area.

Kurtz (1977: 1978) reported mostly Lernaeenicus spp.

infesting 5.7 and 7.1 percent of specimens collected in Barnegat Bay, NJ. Incidence of parasitism was greatest in the summer and fallo In the present study, 104 percent of 1,262 specimens examined from the Artificial Island area were infested with one or more Lernaeenicus spp. per anchovy. Voorhees and Schwartz (1979) noted L. radiatus infesting specimens in Cape fear River, NC. Other parasites of bay anchovy have been observed during the present study.

Unidentified nematodes were found in the gonads of 0.48 percent of the specimens examined and occurred during the spring and summer in both sexes. Argulus spp., a parasitic brauchuran has also been observed attached to larval and ju~enile bay anchovy taken in entrainment samples at Salem.

Mahoney et al. (1973) reported fin rot disease on specimens collected in the New York Bight and attributed it to dense bacterial populations and environmental stress from domestic and industrial pollution. Kurtz (1977: 1978) reported fin rot disease on 0.04 and 0.03 percent of the specimens examined during 1975-1977 in Barnegat Bay.

In the present study, one specimen of 1,262 bay anchovy examined was found to have a spinal curvature anomaly (Fig.

3-24). Dahlberg (1970) reported that one anchovy among 1,690 collected from a Georgia estuary showed a similar anomaly. Kurtz (1978) found one specimen among 3,297 examined from Barnegat Bay with some form of vertebral

• deformity.

3-14 3.7 3.7.1 NUTRITION AND GROWTH Feeding

• The principal food source of bay anchovy is zooplankton (see Section 3.7.2 for further information on diet); they never switch to the phytoplankton-dominated diet utilized by other engraulids which develop more sophisticated gill rakers and epibranchial organs (Kaufman et al., 1980).

Darnell (1958) reported that young bay anchovy in Lake Ponchartrain, LA strained large quantities of microzooplankton and detritus from the water column while larger specimens exhibited greater selectivity. However, in laboratory studies individual zooplankters were captured by larvae and this behavior was found to be visually aided (Odum and Heald, 1972}. Additionally, Daly (1970) reported that adult bay anchovy demonstrated an ability to locate and capture individual zooplankton rather than strain the water indiscriminately.

The feeding behavior of bay anchovy larvae was described by Detwyler and Houde (1970). Following yolk absorbtion, eye pigmentation and mouth development (see Section 3.3) an s-flex feeding behavior was initiated when prey were within striking range. As the fish grow and gradually transform into juveniles they discontinue this behavior and begin to dart after food (Breder and Krumholz, 1943).

Diel patterns in feeding behavior have not been well defined. Daly (1970) observed clupeoids, including bay anchovy, feeding actively at night in waters along the Southern Florida coastline. However, when predators were active, feeding stopped and small schools formed near the surface. Darnell (1958) reported that while daily feeding patterns in Lake Pontchartrain, LA were not entirely defined, both young and adult fish feed during the middle of the day but the adults appear to begin feeding earlier in the morning.

3.7.2 Food During the present study, copepods (76.8 percent), Bosmina 1 spp. (17.0) and Neomysis americana (1.8) were the most abundant food items identified in the stomachs of adult bay anchovy (Meadows, 1976). Similar findings were reported by Hildebrand and Schroeder (1928) for Chesapeake Bay, and Schwartz et al. (1980) for Cape Fear Estuary. However, Stevenson (1958) reported that crab zoea and megalops I

3-15

• constituted a larger portion of the diet of specimens collected in lower Delaware Bay.

Bay anchovy exhibit a gradual change in diet with growth.

Carr and Adams (1973) found that clam larvae (veligers) and copepods accounted for most of the food consumed by small bay anchovy (15-23 mm SL). During the present study copepods and Bosmina spp. were more common in smaller individuals (37-55 mm TL), while N. americana was found more often in the stomachs of larger individuals (55-98 mm TL)

(Meadows, 1976). Schwartz et al. (1980) reported that as bay anchovy grew larger than 29 mm SL the volume of mysids in stomachs gradually increased, and the volume of copepods decreased. Kinch (1979) found that the percent dry weight of copepods decreased while that of amphipods, crab zoea and nematodes increased in the stomachs of bay anchovy greater than 31-35 mm SL. Darnell (1958) indicated that while diet shifted towards larger macrozooplankters, it was still supplemented by small mollusks, crustaceans and detritus.

Detwyler and Houde (1970) studied food selection of bay anchovy larvae reared in the laboratory. Natural plankton less than 150 µm in width were supplied during the initial rearing phase. Larvae began feeding at 3.0-3.9 mm TL and chose organisms averaging 58 µm ~n width. Most food organisms selected were copepod larvae (nauplii, copepodites) and adults, while barnacle and Artemia nauplii and invertebrate eggs were generally ignored. Size of the organisms selected by growing larvae increased exponentially on successive days. However, the preferred food size was still less than 200 µ m for larvae of 20 mm TL. Regression analysis indicated that average food size (nauplii, copepodites and copepods) may be estimated from the length of larvae by:

(I _ = + 0.1305) 0 95 where X = length of bay anchovy larvae (mm TL)

Y =average width of food (µm) 3.7.3 Growth Rate Larvae In laboratory studies Saksena and Houde (1972) stocked bay anchovy eggs (4/liter) and reared the resulting larvae at three food levels. Daily growth rates were 0.43-0.55, 0.49-

• 0.53 and 0.52-0.56 mm/day at low, medium and high food levels, respectively (Fig. 3-25). Based on these growth

3-16 rates, they developed regression equations which estimated total length as a function of age (days from hatching)

(Table 3-9). Further studies by Houde (1974; 1977) determined that growth rate of laboratory-reared larvae ranged from 0.35-0.68 mm/day (X=0.56 + 0.08 mm/day; + 0.95 C.L. = 0.04) at various food levels and stocking densities (Table 3-10). While growth rates were significantly (p<0.0005) greater at higher food levels (ca. > 1,000 organisms/I), they were not significantly (p>0.05) affected by egg stocking density (Houde, 1977). There was, however, a tendency towards lesser mean lengths at higher stocking densities.

Laboratory studies conducted during the present study indicated that in 16 days bay anchovy grew to 5.5-10.5 mm TL (Table 3-11). Assuming that larvae are 2.0 mm TL at hatching, mean growth rate ranged from 0.21-0.55 mm/day.

Stevenson (1958) estimated a mean larval growth rate of 0.57 mm/day, based on length-frequency distributions of bay anchovy (2-19 mm SL) in the Delaware estuary a11d timing of substantial spawning as indicated from ovarian egg studies.

Juveniles Utilizing length-frequency data, Stevenson (1958) estimated a mean growth rate of 0.3 mm/day (r = 0.98) for bay anchovy juveniles collected in Delaware Bay. Specimens grew faster between late-July and mid-August (ca. 0.43 mm/day) than between mid-August and mid-October (ca. 0.25 mm/day).

Perlmutter (1939) determined a mean growth rate of 0.33 mm/day for young bay anchovy (20-55 mm) during June through September in Long Island Sound. Kqrtz (1977; 1978) and Marcellus (1972) reported mean growth rates of 0.15-0.16 and 0.18 mm/day, respectively for specimens collected from July through October in Barnegat Bay.

Adults During the present study the relationship between age and length was determined by analysis of otoliths obtained from 1,675 bay anchovy taken during river and impingement sampling from April through August 1983 (See Appendix I for program details). After the number of annuli was determined, the approximate age in months, relative to the median egg production date of June 11 for 1982, was estimated. At least 3 age-classes were identified in each

3-17 monthly sample and the oldest specimens, 76-90 mm FL, appeared to be approximately 48-50 months of age (Tables 3-12 through 3-16). Mean length at the end of the first season of growth is approximately 57 mm FL, as indicated by the mean length of age group 0+ fish in April-May, i.e.,

prior to the start of the new growth season. Growth appears considerably less during the second and third years; estimates of mean length attained during April through August ranged from 60.9-70.8 and 62.9-80.5 mm FL, respectively (Fig. 3-26).

A von Bertalanffy growth function was fit to the observed mean length (mm FL) at age data (Fig. 3-27). The function was constrained to pass through the expected hatching size of 2 mm at time zero and the 48 and 50 month old individuals were not included because of the small sample size. The resulting equation was:

Lt = 68 _4 (l-e-2.632(t+0.012))

where L

t = fork length (mm) at time t t = time in years.

Growth in weight relative to length data from the present study, and as reported, but on much larger samples, by workers from other regions is summarized in Table 3-17.

Kurtz (1977; 1978), working in Barnegat Bay, NJ observed a significant difference (p<0.05) in the length-weight relationship between males and females taken in 1975-1976, but not in 1976-1977. Schwartz et al. (1979a; 1979b) detected significant (p<0.05) annual variation in the length-weight relationship of bay anchovy in the Cape Fear Estuary from 1973 to 1976; no difference, however, was found between 1976 and 1977. The low slope of the regression equation in 1975 (2.23 versus 2.75-3.18) indicates that fish of similar length were generally lighter in weight than during the other years (Schwartz et al., 1979a).

3.7.4 Metabolism Tucker (1980) measured respiration of bay anchovy eggs and larvae at 24.0 + 0.3°C. Oxygen consumption increased from about 0.02 to 0~10 µ10 /individual/hr from time of fertilization through the end of the larval yolk-sac stage (76 hr). Respiration increased further to about 0.14-0.15

µ10 /larvae/hr for larvae fed through 200 hr, but dropped 2

rapidly to < 0.05 µ10 /larvae/hr by 150 hr in those not fed.

2

3-18 Tucker also estimated the energy burned catabolically using Brett and Groves' (1979) oxycalorific equivalent of 0.00463 calories/µ10 consumed (Table 3-18). Tucker (1980) compared 2 caloric content of Acartia tonsa nauplii and the individual rotifers (Branchionus plicatilis) with metabolic rate of the unfed larvae. Sixty hours after fertilization at the time of yolk absorption, bay anchovy larvae would require 1.5 nauplii or 14 rotifers to maintain the estimated metabolic rate of 0.26 cal/larva/60 hr (.0106 cal/larva/day).

Additional consumption would be required for extra growth, excretion and increased metabolic activities.

3.8 BEHAVIOR 3.8.1 Migrations and Local Movements Seasonal Movements The seasonal pattern of migration for bay anchovy in Middle Atlantic estuaries has been described by Stevenson (1958),

EA (1976), Kurtz (1978), and Lippson et al. (1979). In the spring individuals which have overwintered in the deep channels of lower estuarine and contiguous coastal ocean areas move toward shore or upstream into shoal areas within the estuary. During the present study of the Delaware Estuary, a similar migration pattern was inferred from changes in density during 1980, the only year in which winter data was collected. Bay anchovy age l+ and older taken in January were typically found in the lower Bay between rkm 0 and 48 (Section 4.2.3). By May they had become more numerous between rkm 48 and 80, suggesting an upstream movement. Seasonal movement patterns within Delaware River and Estuary are summarized in Figure 3-28.

Larvae and juveniles spawned in the lower estuary during spring and summer, repo~tedly move upstream into low .

salinity (typically 0-7 ppt) nursery areas (Dovel, 1971; EA, 1976; Polgar et al., 1979; Wang and Kernehan, 1979; Lippson et al., 1979). During the present baywide study (1979-1982) upstream transport of larvae into lower salinity areas was also inferred from temporal differences in baywide distribution data (Section 4.2.3). However, substantial numbers of larvae remained in higher salinity (ca. > 10 ppt) down-estuary regions. Similar distribution occurred in the Potomac Estuary (Polgar et al., 1979). There was no consistent annual upstream movement pattern in the Delaware Estuary for juvenile (age 0+) specimens; their range typically extended from the lower bay (rkm 16) to the lower river (rkm 117) (Section 4.2.3).

3-19

• In late summer-early fall, adults migrate to deeper waters down-estuary (Stevenson, 1958; EA, 1976; TI, 1976). In the fall, juveniles generally move into deeper channel areas of the nursery area where they may remain over the winter (Stevenson, 1958: Dovel, 1971: Hoese, 1973; Kaufman et al.,

1980). In some estuaries low temperatures may force the juveniles to migrate downstream after the adults have left (TI, 1976: Polgar et al., 1979: Wang and Kernehan, 1979).

In the Delaware Estuary during the present study, a decrease in density of juveniles (age 0+) and adults (age l+ and older) in the fall (Section 4.2.3) may reflect movement of these fishes into deeper downbay channel zones or beyond the boundaries of the study area. In other estuaries adults move to nearshore ocean areas as well as to deep channels in the lower estuary during winter (Dovel, 1971: Hoese, 1973:

EA, 1976: Kurtz, 1978 and Polgar et al., 1979). For example, overwintering adults have been found 10 km off the Georgia coast (S2tzler, 1977).

Onshore-offshore movements within estuaries have been reported *. Stevenson (1958) found that adults from an onshore population composed of juveniles and adults within Delaware Bay had, by mid-summer moved offshore.

Additionally, Kaufman et al. (1980) inferred an apparent seasonal offshore to onshore movement in the upper Chesapeake Bay from the preponderance of age 0+ specimens in the deeper, offshore zone in late summer and the dominance of l+ or older fish in the onshore zone in the spring.

Diel Movements Bay anchovy larvae and postlarvae exhibit a diel migration between the surface and bottom in the Potomac River (Polgar et al., 1979). Richkus (1980) found a similar migration occurring with adult specimens tentatively identified as anchovies during an acoustic survey in the upper Chesapeake Bay near Calvert Cliffs. Conte et al. (1980) reported maximum catches of juveniles offshore during the day and onshore at night in upper Chesapeake Bay. Reis and Dean (1981) suggested that bay anchovy larvae and juveniles in South Carolina estuaries move into small intertidal creeks during daylight hours to escape predators and then disperse into larger creeks at night to feed.

r 3.8.2 Schooling r

In St. Johns River, FL, McLane (1955) observed well defined schools of bay anchovy at the surface and near the bottom in

3-20 deeper waters. In southern Florida, Daly (1970) observed schools of clupeoids, including bay anchovy, being pursued by feeding jacks (Caranx spp.) nearshore during daylight.

However, just before nightfall the schools dispersed and the fish moved offshore where they fed in areas with strong currents; they formed schools at night only when predators threatened.

3.8.3 Response to Stimuli Temperature Wyllie et al. (1976) and Terpin et al. (1977) determined the critical swimming speed (CSS) for bay anchovy at acclimation temperatures between 5 and 25°C (Table 3-19). The CSS was defined after Brett (1964) as:

CSS = V + (T/10 x V) s where v = highest velocity (cm/sec) a fish could swim s

against for a 10.min period T = time in minutes at failed velocity V = velocity increment.

An increase in acclimation temperature generally resulted in an increase in CSS (Fig. 3-29). Multiple linear regression analysis indicated that acclimation temperature explained most of the variation in critical swim speed for specimens between 53 mm and 95 mm TL. Critical swimming speed for bay anchovy may be estimated using the equation:

2 Y = 6.69 + l.46X (r = 0.78) where Y = critical swimming speed (cm/sec)

X =acclimation temperature (°C)

Experimental studies of the effect of acclimation temperature on preferred temperature within a gradient were conducted with adult specimens (36-95 mm TL) at salinities ranging from 25-30 ppt (Wyllie et al., 1976; Terpin et al.,

1977). Preferred temperatures, 21.5-27.5°C, were generally 1 greater than or equal to acclimation temperatures, l0-21°C.

Changes in the acclimation temperature did not significantly change (p>0.05) the preferred temperature. The authors 1 indicated-that final temperature preferendum could not be determined from the data.

3-21

• Similar studies conducted at lower salinities (3-10 ppt) indicated that higher temperatures (14°C) were also preferred when acclimation temperatures were low (5°C)

(PSE&G, 1978b) but at higher acclimation temperatures (24-280C) the preferred temperature (21-28°C) did not exceed the acclimation temperature (EA, 1978; PSE&G, 1978b). Final temperature preferendum (optimum temperature) was estimated to be ca. 27°C (PSE&G, 1978b).

Experimental studies with adult bay anchovy (50-90 mm TL) at salinities ranging from 25-29 ppt indicated that avoidance temperatures, 26.8-32.1°C, were considerably higher than the highest acclimation temperatures, 22.0°C (Wyllie et al.,

1976; Terpin et al., 1977). No avoidance response was elicited from specimens acclimated to l0°C (Wyllie et al.,

1976).

Results of experimental studies with juvenile and adult specimens (22-75 mm TL) at lower salinities, 4-10.5 ppt, indicated that avoidance temperatures were also considerably higher than acclimation temperatures; specimens acclimated to 12°C, the lowest iemperature studied, avoided 21-22°C; those acclimated to 28°C, the highest temperature studied, avoided 35°C (PSE&G, 1978b). Multiple reg~ession analysis indicated that acclimation temperature and salinity were She most important factors affecting avoidance temperature (r =

0.63).

Chlorine Experimental studies of chlorine avoidance were conducted under varying environmental conditions with both juvenile and adult specimens (PSE&G, 1978b). For pH between 7.1 and 7.8, the avoidance concentration (free plus combined chlorine residuals) varied between 0.04 and 0.24 mg/l (mean

= 0.11 mg/l).

Water Clarity r

Using a stepwise multiple regression technique, Livingstone et al. (1976) and Anderson et al. (1977) reported that water r clarity (as measured by Secchi disc visibility) was a significant positive predictor variable in determining the presence of bay anchovy in Apalachicola Bay, FL and the surf zone off Folly Beach, SC, respectively.

r

Table 3-1 Number of sexually immature and mature .bay anchovy from five collections taken in Delaware Bay during 1953 and 1956 (from Stevenson, 19 58).

1953 1956 June 4 June 23 May 27 June 5 July 9 Total Percent Q) Q) Q) Q) Q) Q) Q)

µ µ µ µ µ µ µ

l Q)  ::l Q)  ::l Q)  ::l (IJ  ::l Q)  ::l Q)  ::l Q)

.µ µ .µ µ .µ µ .µ µ .µ µ ..µ µ .µ µ SL cu  ::l cu  ::l cu  ::l cu  ::l cu  ::l cu  ::l cu  ::l

.µ E ..µ .µ .µ .µ in § cu E cu E

cu § cu E

cu E .µ E .µ mm *.-1 E *.-1 E .....E E ..... e: .....E s E

• .-1 s cu E

• .-1 cu E

35-39 9 11 9 11 45 55 40-44 0 5 0 12 0 6 0 23 0 100 0 51 0 100 w 45-49 0 11 0 18 0 15 0 7 I N

N 50-54 0 12 0 10 o. 20 0 30 0 72 0 100 55-59 0 5 0 10 0 25 0 25 0 65 0 100 60-64 0 12 0 20 0 15 0 47 0 100 65-69 0 14 0 15 0 8 0 37 0 100 70-74 0 15 0 15 0 100 Total 9 11 0 33 0 76 0 116 0 85 9 321

3-23 Table 3-2 Developmental stages of bay anchovy gonads (adapted from Kurtz, 1978 and Stevenson, 1958).

Developmental Gonad Stage Description Immature Ovary Small, may be indistinguishable in specimens (30 mm; eggs small.

Testes Small, may be indistinguishable in specimens <30 mm.

Mature Ovary At rest Size increases, pale yellow, granular consistency; most eggs 0.05-0.1 mm.

Enlarged Size increases; pale yellow, numerous 0.2 to 0.4 mm eggs, yellowish by 0.35 mm and twice as long as wide.

Ripe Maximum size, white; eggs transparent, most )0.5 mm, rounder by 0.6 mm, fully ripe eggs )0.85-0.95 mm, pale blue, soft sheres filled with globules of yolk.

Partially spent Size decreases, somewhat flacid; fewer eggs )0.5 mm.

Spent Size decreases, yellow to pale orange; fewer eggs )0.4 mm.

Testes At rest Size increases, white to pale yellow, firm texture, no visible convolutions.

Enlarged Size increases, some convolutions.

Ripe Maximum size, soft, highly convoluted.

Partially spent Size decreases, somewhat flacid, less convoluted.

Spent Size decreases, flacid, few or no convolutions.

r

Table 3-3 Bay anchovy spawning season (adapted from Jones et al., 1978).

Location Reference Spawning Season Temperature( *c) Salinity(ppt)

Buzzards Bay-Cape Cod Canal, MA Collings et al., 1981 May-August 12 > 24 Narragansett Bay, RI Herman, 1963 June-August 17.2-24.4 Long Island Sound Richards, 1959; June-September 13.3-23.5 19.9-27.9 Wheatland, 1956 peak late July-early August Ocean and Waterways near Milstein et al., late Ma}*-mi-1 s .. ptember 16.0-30.0 20-30 Little Egg Inlet, NJ 1977 peak June-July Delaware Bay Stevenson, 1958 May-August peak June Delaware Bay Wang and Kernehan, 1979 May-September 15.0-30.0 > 5.0 peak mid July-mid August 22.0-27.0 10.0-20.0 Delaware Estuary, near Present Study primarily late May-September 14.7-29.5 1.0-10.S Artificial Island peak late May (rkm 64-97)

Delaware Estuary Present Study May-early November ca. 13-21 ca. 0.0-32.0 (rkm 0-117) peak late May-late July ca. 17-28 ca. 0.0-32.0 Chesapeake & Delaware Kernehan et al., 1978 May-July 16-30 1.0-7. 2

• canal Upper Chesapeake Bay Dovel, 1971 late April-late September 9-31 1-22 peak July > 20 13-15 Lower Chesapeake Bay Pearson, 1941; May-August or mid-September > 17 Olney, 1983 North Carolina coastal Hildebrand and late April-early September waters Cable, 1930; Kuntz, 1914 peak July South Carolina estuaries Shealy et al., 1974 June-July Biscayne Bay, FL Houde, 1974 all year, but not common in December-January Mississippi Sound Edwards, 1964 February-August, peak July o. 5-31.4 Western Gulf of Mexico Hoese, 1965 May-November, February ca. 30-37

3-25

• Table 3-4.

Bay anchovy spawning fraction by week (R-factor) and annual egg production for 1979 through 1982.

SEawnin~ Fraction Week Start oaz 1979 1980 1981 1982 Mean 1 1 2 8 3 lS 4 22 s 29 6 36 7 43 8 so 9 S7 10 64 11 71 12 78 13 8S 14 92 lS 99 16 106 17 113 0.000000 O.C'OOOOO 0.000039 0.000000 0.000010 18 120 0.000000 o.ouoooo 0.001363 0.000000 0.000341 19 127 0.000000 0.0184S8 0.003439 0.013478 0.008844 20 134 0.000000 0.0611Sl 0.011012 0.144285 O.OS4112 21 141 0.1S8332 0.093408 0.024000 0.1Sl208 0.106737 22 148 0.131346 0.111750 0.0420S2 0.098136 0.09S821 23 lSS 0.0370SO 0.098323 0.061600 O.OS0861 0.061709 24 162 0 .066212 O.OSS357 0.059499 0.050116 0 .057796 25 169 0.070678 0.063460 0.05392S 0.063312 0.062844 26 176 0.072472 0.010201 o.OS3687 0.087888 0.071062 27 183 0.07S023 0.076900 O.OSS248 0.089029 o.014oso 28 190 0.077484 0.10091S 0.181407. 0.077483 0.109322 29 197 0.084338 0.129747 0.200846 0.060469 0.118849 30 204 0.100721 0.083923 0.1194Sl O.OSS794 0.089972 31 211 0.070916 0.032407 0.07S343 0.036356 O.OS3756 32 218 0.03710S 0.00241S 0.041708 0.011336 0.023141 33 225 0.016673 0.001123 0.012834 0.003372 0.008S01 34 232 o.00129S 0.000210 0.000649 0.003127 0 .001320 3S 239 0.000096 0.000127 0.000964 0.001835 o.ooo7S6 36 246 0.000078 0.000069 0.000717 0.001084 0.000487 37 2S3 0.000062 0.000027 o.00021s 0.000626 0.000233 38 260 0.000048 0.000021 0.000000 0.000178 0.000062 39 267 o.00003S 0.000001 0.000000 0.000023 0;000016 40 274 0.000022 0.000000 0.000000 0.000004 0.000010 41 281 0.000009 0.000000 0.000000 0.000000 0.000002 42 288 0.000001 0.000000 0.000000 0.000000 0.000000 43 29S 0.000002 0.000000 0.000000 0.000000 0.000001 44 302 0.000001 0.000000 0.000000 0.000000 0.000000 4S 309 46 316 47 323 48 330 49 337 so 344 Sl 3Sl S2 3S8 S3 36S Total egg production 6.94S21!.13 1.16431!.14 8.103SE13 8.8989E13

Table 3-5 Annual viability of bay anchovy eggs during night and day in the Delaware River near Artificial Island (rkm 64-97), 1974-1977.

Viability (Percent)

Night Day Mean Source 1974 58.9 14.7 36.8 Maiden et al. , 1976 1975 14.6 6.8 10.7 Maiden et al. , 1977 1976 26.l 10.3 18.2 Maiden and Randle, 1977 1977 46.5 9.2 27.9 PSE&G, 1978a w I

N m

- - -~

Table 3-6 Effect of temperature on the number of hours from hatching until eye pigmentation and total starvation, and per yolk volume remaining at time of eye pigmentation and 24 hrs thereafter (adapted from Houde, 1974).

Percent yolk Hours from Hours from Percent Yolk remains at Temperature hatching until hatching until remains at eye 24 hr after (oC) eye pigmentation total starvation pigmentation time eye pigmentation 22 38.8 137. 5 3.25 24 33.5 125.8 2.52 o.o w

28 27.1 102.3 1.80 o.o I N

32 26.4 78.8 20.50 o.o -...]

3-28 Table 3-7 Bay anchovy larvae thermal tolerance secondary (plume) entrainment data (Present Study).

Percent Exposure Exposure Number Number Dead Control Acclimation Temp Time Entered And Stunned(LOE) Mortality Temp (°C) (°C) (Minutes) (0 hr) at 24-hr (24-hr) 17.5 32.0 LO 14 1 17.5 32.0 LO 14 1 17.5 32.0 5.0 13 1 17.5 32.0 5.0 14 2 17.5 32.0 15.0 12 1 17.5 32.0 15.0 14 2 17.5 32.0 30.0 15 1 17 ,5 32.0 30.0 14 0 17.5 34.0 1.0 15 1 17.5 34.0 l.O 15 1 17.5 34.0 5.0 15 0 17 ,5 34.0 5.0 15 0 17.5 34.0 15.0 21 21 17 ,5 34.0 15.0 18 18 17 ,5 34.0 30.0 15 1 17.5 34.0 30.0 14 3 3.4 (1/29) 20.0 22.0 30.0 8 2 20.0 22.0 60.0 8 3 20.0 22.0 180.0 10 1 20.0 24.5 30.0 11 4 20.0 24.5 60.0 9 1 20.0 24.5 240.0 9 3 20.0 25.5 30.0 9 8 20.0 25.5 60.0 11 5 20.0 25.5 240.0 9 1 20.0 27.5 30.0 11 5 20.0 27.5 60.0 10 3 20.0 27.5 240.0 10 3 13.6 (3/22) 20.5 24.5 15.0 5

(~

9 20.5 24.5 30.0 15 4 20.5 24.5 60.0 15 1 20.5 26.5 15.0 12 3 20.5 26.5 30.0 15 2 ,I 20.5 26.5 60.0 14 3 20.5 28.5 15.0 13 2 20.5 28.5 30.0 14 0 20.5 28.5 60.0 13 5 1 20.5 30.5 15.0 17 0 20.5 30.5 30.0 15 0 20.5 30.5 60.0 16 2 12.9 (4/31) 1

• I I

3-29 Table 3-7 Continued Percent Exposure Exposure Number Number Dead Control Acclimation Temp Time Entered And Stunned(LOE) Mortality Temp (°C) (oC) (Minutes) (0 hr) at 24-hr (24-hr) 22.5 26.5 15.0 15 2 22.5 26.5 30.0 15 0 22.5 26.5 60.0 15 0 22.5 28.0 15 .o 11 0 22.5 28.0 30.0 15 0 22.5 28.0 60.0 12 0 22.5 30.0 15.0 15 0 22.5 30.0 30.0 14 0 22.5 30.0 60.0 15 1 22.5 32.0 15.0 15 2 22.5 32.0 30.0 15 0 22.5 32.0 60.0 15 0 o.o (0/29) 23.0 27.5 15.0 12* 3 23.0 27.5 30.0 11 2 23.0 27.5 60.0 9 1 23.0 29.0 15.0 9 0

• 23.0 23.0 23.0 23.0 23.0 23.0 29.0 29.0 31.0 31.0 31.0 32.5 30.0 60.0 15.0 30.0 60.0 15.0 11 12 14 11 11 7

0 1

0 3

3 1

23.6 32.5 30.0 8 1 23.0 32.5 60.0 9 2 o.o (0/24) 23.0 36.0 1.0 16 0 23.0 36.0 5.0 14 2 23.0 36.0 15.0 15 0 23.0 36.0 30.0 15 15 23.0 37. 0 1.0 14 0 23.0 37.0 5.0 15 4

~ 23.0 37.0 15.0 15 15 23.0 37.5 30.0 15 15 17 .2 (5/29) 23.5 26.5 30.0 9 1 l 23.5 23.5 23.5

26. 5 .

26.5 28.0 60.0 240.0 30.0 10 12 9

1 2

2 23.5 28.0 60.0 10 3 r 23.5 28.0 240.0 8 3 23.5 29.0 30.0 8 2 23.5 29.0 60.0 9 0 I 23.5 29.0 240.0 6 0 23.S 31.5 30.0 6 0 23.5 .31.5 60.0 10 5 3 11.1 (2/18)

I 23.5 31.5 240.0 11 I

3-30 Acclimation Exposure Temp Exposure Time Table 3-7 Continued Number Entered Number Dead And Stunned(LOE)

Percent Control Mortality Temp (°C) (°C) (Minutes) (0 hr) at 24-hr (24-hr) 24.0 34.0 1.0 16 0 24.0 34.0 5.0 15 0 24.0 34.0 15 .o 15 0 24.0 34.0 30.0 15 3 24.0 36.0 1.0 18 2 24.0 36.5 5.0 15 0 24.0 36.5 15.0 15 4 24.0 36.5 30.0 15 1 o.o (0/30) 24.0 36.0 1.0 16 0 24.0 36.0 5.0 14 0 24.0 36.0 15.0 16 7 24.0 36.0 30.0 15 5 24.0 39.0 1.0 14 2 24.0 39.0 5.0 15 10 24.0 39.0 15 .o 15 15 24.0 39.0 30.0 15 15 3.4 (1/29)

• 25.0 27.5 30.0 10 0 25.0 27.5 60.0 11 4 25.0 27.5 240.0 9 3 25.0 29.0 30.0 10 0 25.0 29.0 60.0 10 3 25.0 29.0 240.0 11 4 25.0 32.0 30.0 9 2 25.0 32.0 60.0 9 O*

25.0 32.0 240.0 8 2 4.6 (1/22) 25.0 36.0 1.0 15 2 25.0 36.0 LO 15 3 25.0 36.0 5.0 15 2 25.0 36.0 5.0 15 0 25.0 36.o 15 .o 16 4 25.0 25.0 36.0 36.0 15.0 30.0 16 15 1

5

~

25.0 36.0 30.0 18 6 25.0 25.0 38.0 38.0 1.0 30.0 17 16 2

16 I 25.0 38.5 1.0 16 2 25.0 25.0 25.0 38.5 38.5 38.5 5.0 15 .o 15 .o 15 15 14 9

15 14 25.0 38.5 30.0 14 14 25.0 39.0 5.0 15 12 13.0 (4/30) j

~

.Total Control Mortality 7.2 (21/29

• Species Location Specimens Examined Tabla Frequency of occurrence of b~chovy in the stomachs of some common predatory marine and estuarine fish species.

Length Range of No. of Stomachs

\Ii th Bay Anchovy Percent of Stomachs With Bay Anchovy No. o.f Spec !mens Examined Author Striped Bass Hudson River (rkm 53-74)76-200 3 0.6 514 Gardiner and Hoff, 1982 Little Egg Inlet 6 7.1 85 Hoff, 1976 New Jersey Delaware River 88 28.4 310 Bason, 1971

( rkm 64-97) l Shore z:one-Dela.vare 40-310 2.5 279 deSylvs et al., 1962 River Estuary Chesapealu! Bay 218 12. 6 1,736 Hollis, 1952 Weakfish Delaware Bay 120-300 71 34.l 205 Shuster, 1959 Delaware River 31-190 6.0 116 Meadows, 1976 (rkm 64-97)

Delaware River 6 9.4 64 Thomas, 1971

( rkm 64-97)

Shore zone-De lava re 20-150 4 1.8 220 deSylva et al., 1962 River Estuary Coastal Rivers (SC-FL) (200 2.5 Stickney et al., 1975 w

I Bluefish Delaware River 41-228 22 8.9 246 'Present Study w

I-'

(rkm 64-97)

Shore zone-Delaware 40-310 2.5 279 de Sylva et al., 1962 River Estuary Long Island Sound 14 20.9 67 Richards, 1976 White Perch Delaware River 51-200 10 4.5 222 Meadows, 1976 (rkm 64-97)

Silver Perch Delaware River 1 3. 7 27 Thomas, 1971 (rkm 64-97)

Coastal rivers (SC-FL) <200 2.7 Stickney et al., 1975 Clearnose Skates Delaware Bay *4 1.1 363 Fitz, 1956 Crevalle Jack Shore zone-Delaware 30-160 1 2.5 40 deSylva et al., 1962 River Estuary Northern Sennet Shore .r:one-Del.tware 50-llO 3 3.5 85 ~eSylvs et al., 1962 River Estuary Atlantic Silverslde Shore zooe-Delawre 50-120 4 2.1 193 deSylva et al., 1962 River Estuary Croaker Coastal Rivers (SC-FL) (200 0.5 Stickney et al., 1975 Star Drum Coastal Rivers {SC-FL) (200 1.0 Stickney et al., 1975 1

Eng raul idae

3-32 Table 3-9 Growth equations (Y=estimated total length, X=days after hatching),

and growth rates (+ 95 percent confidence limits) for laboratory-rrared-bay anchovy larvae in food level experiments (adapted from Saksena & Houde, 1972).

Food Level (organisms/!) Equation b + 0.95 CL r 621 Y=l.123+o.546X 0.546+o.138 0.92 692 Y=2.195+0.431X 0.431+0.169 0.93 680 Y=2. 377+0. 465X 0.465+:"0.120 0.93 1330 Y=2.578+0.495X 0. 495+o. 092 0.93 1598 Y=2.433+0.526X 0. 526+"0 .117 0.96 1688 Y=2.202+0.493X 0. 493+o. 077 0.96 2811 Y=2.336+0.546X 0.546+0.051 . 0.98 3080 Y=2.650+0.521X o.521+0.051 0.98 3323 Y=l.87C+0.562X 0.562+"0.026 0.96 1

Mean water temperature was 28°C and mean salinity 35 ppt.

Table 3-10 Growth rates of laboratory-reared larval bay anchovy (adapted from Houde 1974; 1977).

Tests with survival rates of less than 10 percent were not included.

1 Duration of Growth Rate Percent Temperature Salinity Stocking Density Food Level Test (mm/day) Survival (oC) (ppt) (eggs/liter) (organisms/liter) (days) 0.48 21. 7 24 31-35 5.0 1500 7 0.59 26.5 28 31-35 5.0 1500 7 0.35 40.0 26 32-36 0.5 50 16 0.52 11.4 26 32-36 0.5 100 16 0.64 48.6 26 32-36 0.5 1000 16 0.45 20.0 26 32-36 0.5 5000 16 0.63 62.9 26 32-36 0.5 5000 16 0.68 74.3 26 32-36 0.5 5000 16 w 32-36 2.0 1000 16 I 0.62 65.7 26 w 0.54 58.6 26 32-36 2.0 1000 16 w 0.64 56.4 26 32-36 2.0 5000 16 0.62 62.1 26 32-36 2.0 5000 16 0.60 17.9 26 32-36 8.0 1000 16 0.53 33.6 26 32-36 8.0 1000 16 0.61 74.8 26 32-36 8.0 5000 16 0.55 47.7 26 32-36 8.0 5000 16 0.45 55.3 26 32-36 32.0 1000 16 0.50 43.4 26 32-36 32.0 1000 16 0.59 63.4 26 32-36 32.0 5000 16 0.56 67.2 26 32-36 32.0 5000 16 1 Growth rates'were calculated from mean standard lengths (hatching size of 2.0 mm) divided by the test duration (days).

Table 3-11 Summary of growth data for bay anchovy larvae and young during present study (1976-1981).

Days After Hatching Life Stage Length mm TL Temp. Range (°C) Salinity Range (ppt) Comments 0.5 Prolarvae 1.6-3. 5 20-24 11-12 Transformation from 1.0 Pro larvae 1.1-3.8 18-30 9-20 prolarvae to postlarvae 2.0 Prolarvae 2.2-3.7 17-25 12-24 occurs 3-4 days after 3.0 Prolarvae 2.6-3.4 19-22 12.5-21 hatching.

3.0 Postlarvae 2.0-3.6 19-27.5 12.5-21 Transformation from 4.0 Postlarvae 2.0-3.5 18-27 9-20 postlarvae to young 5.0 Postlarvae 2.2-4.3 19.5-25 15-20 occurs at approximately 6.0 Postlarvae 2.6-4.4 19-25 12-22 30-45 days after hatching 7.0 Postlarvae 4.1-6.2 22-25.5 20-21 10.0 Postlarvae 3.2-6.6 :P-26 16-20 w I

13-14 Postlarvae 4.0-6.0 12-21 14-22 w

~

16.0 Postlarvae 5.5-10.5 22.5-30 16 57.0 Young 21.0-40.0 21-28 16-20 65.0 Young 21.0-40.0 21-28 16-20

3-35 Table 3-12 Age-length distr~bution, based on otolith studies, for combined-sex bay anchovy taken in bot;tom trawl collections near Artificial Island in April 1983.

Number of Annuli (Approximate Age in Months)

Length Increment 0 1 2 3 (mm FL) (11) (23) (35) (47) 26-30 31-35 2 36-40 20 41*-45 24 46-50 23 4 51-55 48 11 56-60 115 . 11 61-65 93 8 66-70 3i 10 71-75 4 2 76-80 2 81-85 86-90 2 91-95 Mean 56.6 60.9 80.5 SD 8.0 8.0 8.7 N 356 so 4

3-36 Table 3-13 Age-length distribution, based on oto.lith studies, for combined-sex bay anchovy taken in impingement collections at Salem, May 1983.

Number of Annuli Approximate Age in Months Length Increment 0 1 2 3 (mm FL) (12) (24) (36) (48) 26-30 31-35 3 36-40 21 1 41-45 34 5 46-50 31 1 1 51-55 35 5 56-60 43 5 61-65 56 7 2 66-70 41 13 4 71-75 15 48 13 76-80 7 25 16 81-85 2 11 10 86-90 1 1 91-95 Mean 56.7 70.8 75.5 88 SD 10.9 9.9 6.7 N 288 122 46 1

3-37 Table 3-14 Age-length distribution, based on otolith studies, for combined-sex bay anchovy taken in impingement collections at Salem, June 1983.

Number of Annuli Approximate Age in Months)

Length Increment 0 1 2 3 (mm FL) (13) (25) (37) (49) 26-30 31-35 1 36-40 5 41-45 2 12 46-50 11 2 51-55 1 11 3 56-60 10 7 3 61-65 23 26 5 66-70 20 29 1 71-75 12 33 9 76-80 3 21 8 81-85 2 7 4 86-90 3 91-95 Mean 65~8 64.8 69.3 SD 7.2 12. 4 10 .5 N 73 166 35

3-38 Table 3-15 Age-length distribution, based on otolith studies, for combined-sex bay anchovy taken in impingement collections at *Salem, July 1983.

Number of Annuli (Approximate Age in Months)

Length Increment 0 1 2 3 (mm FL) (14) (26) (38) (50) 26-30 1 31-35 1 36-40 1 41-45 1 7 4 46-50 1 19 8 51-55 4 26 9 56-60 18 6 61-65 4 19 9 66-70 6 38 4 71-75 2 27 12 76-80 2 7 8 1 81-85 2 4 86-90 2 91-95 Mean 60.3 62.3 62.9 78.0 SD 13 .4 10 .3 12 .4 N 22 165 65 1 I

I I

3-39 Table 3-16 Age-length distribution, based on otolith studies, for combined-sex bay anchovy taken in impingement collectiorts at Salem, August 1983.

Number of Annuli (Approximate Age in Months)

Length Increment 0 1 2 3 (mm FL) (3) (15) (27) (39) 26-30 6 31-35 26 36-40 30 41-45 12 2 46-50 4 3 1 51-55 1 11 56-60 17 5 1 61-65 37 10 66-70 48 7 71-75 1 24 7 2 76-80 8 5 5 81-85 2 4 86....;90 1 91-95 1 Mean 37.5 65.5 69.3 74.3 SD 6.5 7.6 9.2 6.9 N 80 153 40 8

Table 3-17 Relationship of length (mm) vs weight (g) for bay anchovy.

Length Length Saaple Correlation Location Reference Measurement Range (mi) Size Coefficient (r) Sex Re lat ionsh 1e New Yo rlt Bight llillr. et al,, 1978 FL 54-89 24 0.85 Hales W=6.41Xl0- 6L3008 (1974-1975)

FL 62-92 20 0.95 Fem.ales W=2.74xl0- 6L3 " 29 FL 26-98 872 0.99 Combined W=l.14xl0- 5L2

• 93 Barnegat Bay, NJ Kurtz, 1977 FL 2146 !lales W=6.3xl0- L3 6

• ?4 (1975-1976) 2870 6 Wm5. 3x10- LJ 'o 9 FL Females Kurtz, 1978 FL 25-89 1318 Hales W=5.2lxl0-6LJ.ll ( 1976-1977)

FL 21-89 1671 Females W=S.22xl0-6 L).lZ FL 21-89 3294 Cowbined W=6.05xl0-6 LJ.0 7 Delaware River Estuary Present Study FL 29-90 100 0.96 Hales W=l.923x10- 6 L3 ' 340 (1974)

FL 24-88 100 0.96 Females W=7.129xl0- 7L3 ' 580 (1974)

FL 31-91 100 0.94 Males W=2.344xl0-6 L3 ' 295 (1975)

FL 30-82 100 0.96 Females W=l.578xl0-6L 3 ~ 386 (1975)

FL 42-84 96 0.87 Males W=l.047xl0- 6L3

• 465 (1976)

FL 23-98 100 0.93 Females W=l.29lxl0- 7L3 ' 951 (1976) w I

FL 32-85 100 0.87 Males W=3. 524x10 -61;. 3

• o97 (1977)

FL 30-87 100 0.88 Females W=l.552xl0-6L 3 "283 (1977) 0 Rehoboth/Ind !an River Derickson and Price. TL Combined W=7.834xl0- 7L3 "426 Bay, DE 1973 Cape F"ar River, NC Schwartz et al., 1979a SL 1S64 Combined W=6. 39xl0-6L 3 "18 (1973)

SL 1387 Combined W=3. 25xl0 -SL 2 ' 75 ( 197 4)

SL 2265 Combined W=2.88xl0-4L 2 ' 23 (1975)

SL 4818 Combined W=l.17x!0- 5L3

• 03 (1976)

SL 1539 Combined W=l.04xl0- 5L3

• 03 ( 1977)

Schwartz et al., 1979b SL 2840 Combined W=l.29xl0- 5L2

• 98 ( 197 8)

Folly Beach, SC Anderson et al., 1977 SL 27.5-59.9 215 0.95 Combined W=9.27x!0- 7L3

• 64 FL 30.9-64.4 215 0.95 Combined W=3.19xl0- 7L3 "82 TL 33.4-77 .o 215 0.94 Combined W=5.02xl0- 7L3 " 61

3-41

• Table 3-18 Cumulative respiration and catabolic ener~y used by bay anchovy eggs and larvae during development at 24°C.

(from Tucker, 1980).

Catabolic Hours After Respiration Energy Fertilization (cumulative µo /larva) (calories) 2 76 (unfed) 5.65 0.026 145 (unfed) 10.26 0.048 145 (fed) 12.91 0.060 206 (fed) 21. 76 0.101 I

I.

I I

Table 3-19 Results of critical swimming speed studies with bay anchovy (adapted from Wyllie et al., 1976 and Terpin et al., 1977).

Acclimation Critical Swimming Speed Dissolved Temperature at Acclimation Temperature 1 Size Salinity Oxygen.

Date (C) (ft/sec) (cm/sec) (BL/sec) (TL mm) Cp12t> ( 1212m l pH 11/11/75 15.0 o.aa 26.a2 2.a5 94.0 27.0 6.a 1.1 11/11/75 15.0 1.06 32.31 3.40 95.0 27. 0 6.a 1.1 11/12/75 15.0 1. 24 37.79 4.55 aJ.O 26.5 6.4 7.9 11/12/75 15.0 o.a5 25.91 2.a2 92.0 26.5 6.4 7.9 11/12/7 5 15.0 1.05 32.00 3.a6 a3.0 26.5 6.4 7.9 12/ 15/7 5 10.0 0.60 la.29 2.23 82.0 25.0 10.S 7.9 12/15/?S 10.0 0.60 la. 29 2.lS 8S.O 2s.o 10.S 7.9 12/1S/7S 10.0 0.78 23. 77 2.ao as.a 2s.o 10.S 7.9 12/lS/7S 10.0 0.70 21. 34 2.S4 a4.0 25.0 10.S 7.9 12/1S/7S 10.0 0.70 21. 34 2.40 89.0 2s.o 10.S 7.9 12/16/?S 10.0 0.62 18.90 2.33 al.O 25.0 9.0 7.9 w 0.40 12.19 1.40 a1.o 24.8 lo.a 7.9 I 1/8/76 5.0 ,p.

l/a/76 s.o 0.6S 19.81 2.S7 77.0 24.a lo.a 7.9 N 1/9/76 5.0 a.so lS.24 La4 83.0 2s.o 11. 2 7.9 1/9/76 s.o 0.40 12.19 1.47 82.0 2s.o 11. 2 7.9 l/lS/76 5.0 a.so 15.24 2.03 7S.O 25.0 10.4 7.9 4/8/76 10.0 0.54 16.46 2.42 68.0 27. 0 9.9 8.1 4/13/76 10.0 0.80 24.38 3.39 72.0 26.S 10.4 8.1 4/22/76 12.0 0.60 18.29 2.61 70.0 27 .o 9.4 a.a 4/22/76 12.0 0.62 18. 90 2. 62 72.0 27. 0 9.4 a.a S/la/76 lS.O 1.16 35.36 4.42 80.0 29.0 8.4 8.1 5/19/76 15.0 1. 03 31. 39 4.76 66.0 29. 0 8.4 8.1 5/19/76 15.0 o.ao 24.38 3.48 70.0 29.0 8.4 a.1 5/19/76 lS.O 0.97 29. S7 3.79 78.0 29.0 8.4 a.!

9/9/76 21.0 l. la 35.97 5.14 70.0 29.0 7.4 7.6 9/9/76 21.0 1.11 33.83 4.63 73.0 29.0 7.4 7.6 9/9/76 21.0 1.10 33.S3 6.33 S3.0 29.0 7.4 7.6 9/10/76 21.0 1. 3a 42.06 5.46 77.0 29. 0 7.4 7.5 12/6/76 25.0 1.17 35.66 4.63 77.0 26.5 9.1 a.a 1

sody lengths

3-43

• 220 BAY ANCHOVY

-E-4 z

r:il u

210 INTERCEPT =

SLOPE -

76.8454 1.36572 Cl::

r:il P-t 200 E-4

r:l d

1-f 190 r:il

~

>i 180 Cl::

~

,. ~

0 E-4

~

0

~

Cl::

170 160

~

d 1-f r:il 150

~

~ 140

~ A A 0

E-4

~

~

~ 1301 ~ "

120 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I ' I I I I I I I I I I I I I I I I I I oo ~ ~ ~ ~ ~ ~ n ~ n oo STANDARD LENGTH (MM)

Relationship between bay anchovy body PUBLIC SERVICE ELECTRIC A.'ID GAS COMPANY length (mmSL) and percentage of left/right SALEM 316(b) STUDY ovary weight.

Figure 3-1

3-44 BAY ANCHOVY

"'o

~ 50.0 INTERCEPT - 307.031 47.5 SLOPE - 1.14369 45.0 A

42.5 A

40.0 37.5 35.0 32.5 30.0 27.5 25.0 I I I I I I I I I I I I I I I I I I I-, I I I I I I I I I I I I I I I I I I I I I I I,*, I I I I I I 50 53 56 59 62 65 68 71 74 77 80 STANDARD LENG TH (MM)

Relationship between bay anchovy body PUBLIC SERVICE ELECTRIC AND GAS COMPANY length (mmSL) and fecundity (eggs > O.OSmm) *.

Data from Stevenson, 1958. -

SALEM 316(b) STUDY Figure 3-2

BAY ANCI-IOVY 0.21

.~ LEGEND

.,* . ~

a 1979 f.,' \ . **c;****i98(f' 0.16

.. ... **A***19a1***

"')('"1982'"

....... "ME.AN

~

.... "*. "'~

w I

~

U1 0.03

~ oo 7 u m ~ ' u re ~ 2 u ~ ~ oo o m oo ~ a w v u 1 a ~ ~ ~ D MAY JUNE JULY AUGUST SEPTEMBER OCTOBER Bay anchovy spawning fraction by week in the Delaware River Estuary PUBLIC SERVICE ELECTRIC AND GAS COMPANY for 1979 through 1982.

SALEM 3l6(b) STUDY F.igure 3-3

3-46 A

B c

PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Bay anchovy eggs. A - morula, B - early embryo, C - late embryo. Diameter = 0.95 mm *(major axis).

Figure 3- 4

.IJ I

--1

• I.I BAY ANCHOVY MAY LEGEND 32 70 o EGG VIABILITY - 1979 o EGG VIABILITY - 1980 lf) A EGG VIABILITY - 1981 E-t x EGG VIABILITY - 1982 28

~ 60 SALINITY - 1979 0 lf)

P-t 24 P:'.l I 50 z

1-1 H

\a.__ ......

20 I D

' []

[]

.\ \ E-t 16 P-t

~"- ..

D x

[] [] ~ P-t 0 \ .......... '\.~ *** ........\ x x x x x x x x x x x w 0 x 0 c ~ ~

I 0

0 0 \\ ~ .* .. 12 E-t 1-1 D D ' *. . '.X

• .. z 20 0 0 0 o* x x 0

\

--- ........ *~*

1-1 H

A A

A

......... ,, []

~*:..--____,.

• ... '\

8 <

lf)

A A x D ',_ -8~ . s-::~ 8 D D [] [] [] D []

A x 10 A A ~ x x ..... .,..:..._ ***-~ .

A AAO...,Moo . '~.0000 00 4 A ~ C A t:..'~ A~ A A A ~ A A A A - - - , , ~-

A -... -..:----.

A ------*********~. - 0 0

0 10 20 M ~ W 00 W 00 00 100 110 120 KILOMETERS FROM OCEAN ENTRANCE Bay anchovy average egg viability and salinity with distance from the PUBLIC SERVICE ELECTRIC AlID GAS COMPANY mouth of the Delaware Estuary during May, 1979-1982.

SALEM 316(b) STUDY Figure 3-5

BAY ANCHOVY JUNE 70 ~ LEGEND 32 lJ EGG VIABILITY - 1979 r/)

• • • .. .'.~ o EGG VIABILITY - 1980

~

~ 60  :.0. . . . . A EGG VIAEI LI TY -

x EGG VIABILITY -

SALINITY - 1979 1981 1982 28

-~**............ -- ...

\

0

~ r/)

.... *. r - -\

24 r:il I 50

• .._ '\

\

• • I I \

\

\

z

~

\ "/

\

\/

I*.

........ ****. \

• • .\

\,

\',

20 I

. \\

"a-. ~*

\..!. ,_..,

.*. \

\\

lJ w

A ~ y* .. I 0 ~*-:_- ......!J lJ x x ~ .j::>.

~ CP lJ '"\."-- ...... x 12 0 0 0

0 lJ 8

x 0

0 lJ R

, "0. ~x Si! \ *.. ........

~ ~ ~ x 0

x x x 1-1 z

1-1

¥ ~

0

6. x c A 0 A A O

\..

0 0 0 0 0 8 <

rf) tl 0 x lJ lJ lJ 6. X ~ 0 X ~ 0

• A\ *a .. Jt<~* *. ~ s t! t! t! t!

10 X ' \ /A'*.-:_:::--:;~ 4 x

A 6.

ts 0 ° --------~ . .,,...--

A x A x A A ~

0""t"TrTTTTTTTTTn"T'nnT'ITTTTTTnCTT1r-rT'TTTT'TTTnn"T"nT'TTTT'TTTn.,..,.,l'TT"rTTT'T'TTn.,..,.,fTT'rTT'T'T'TTn.,..,..,..,.....rTTT'T'T"r"n......-..,.....T"T'TTTT"r"n~~,:.;.;,..:~ 0 0 10 20 30 40 50 60 70 80 90 100 110 120 KILOMETERS FROM OCEAN ENTRANCE Bay anchovy average egg viability and salinity with distance from the PUBLIC SERVICE ELECTRIC AUD GAS COMPANY mouth of Delaware Estuary during June, 1979-1982.

SALEM 316(b) STUDY Figure 3-6

BAY ANCHOVY JUL.Y D LEGEND EGG VIABILITY - 1979 70 0 EGG VIABILITY - 1980 U1

~-- '. ...

A EGG VIABILITY -

x EGG VIABILITY -

SALi NI TY - 19?9 1981 1982 32 f-4 z 60 A ---~1i:mn-i- ::-~~~r- --- 28 1-4

..... sA~INI"rY.:.;.. i'982 .. : ~

0 0 11.. [/)

x x 24 r:il I

50 z I-<

x x x x x x x ....:I zr:ilf-4 '. ~. 20 u

~

w 11..

40 x g 0

"*........... 0 x

x

-- I f--4 16 11..

11..

..._... w 30 8 0 D

" "\ x

\

I

.i::.

~ A 8 0 0 ~ l.O f-4 0 0 0 A 12 f--4 I-< I-<

....:I I-<

20 x 8 z I-<

IIl x ....:I

<r!

I-< x D D fj II.II x ~

D 8 <

[/)

D D 8 0

> x x 10 x x 0 A x x 0 4 0 A x r:il x 0 IA?

A 0 0 0 10 20 30 4-0 50 60 70 80 90 100 110 120 KILOMETERS FROM OCEAN ENTRANCE Bay anchovy average egg viability and salinity with distance from the PUBLIC SERVICE ELECTRIC AlID GAS COMPANY mouth of Delaware Estuary during July, 1979-1982.

SALEM 316(b) STUDY Figure 3-7

BAY ANCHOVY AUGUST 70 .:-:.:-:~:-:~t-.ri. , __ .... 0 LEGEND EGG VIABILITY - 1979 32

(/) 0 EGG VIABILITY - 1980 A EGG VI ABILITY - Hl61 E-i ' x z

1-4 60 EGG VIABILITY -

SALIN! TY - 1979 1962 28

~ ~- ~~tiiUl ~~-is!~-~~-~-

0 P-t (/)

24 r:i:::i I

50 A

0 z 1-4 A H E-i A zr:i:::i 0 0

20 I u 40 ..........._

E-4

~ D 0

.P-t r:i:I 16 P.. D tl 0 P..

w

~~\\ "\.-: - ts. -

30 A 0 0

~- I

~ 0 0 0 D 0 U1 E--i A*.;.A 12 E--i 0 x D D eJ . -.A 1-4 1-4 H . .. . . \

z 1-4 x A A \ 1-4 p::i 20 B A

. H

<1!

1-4 x

x e 0 A D 0

0 0

"* ..\ \* A

\ *.;.,...A- a,

- A A A A A 8 <tl

(/)

> ~

A 0 0

\.~-~*** . ~',~._, ...........

0 10 x x A x D ***o 0 'ci, D D A 0 0 x x

• o o 'e-.o__ 4 0 A x x x x x x r:i:::i ~ x x x x x x 0 0 0 10 20 30 40 50 60 70 80 90 100 110 120 KILOMETERS FROM OCEAN ENTRANCE Bay anchovy average egg viability and salinity with distance from the PUBLIC SERVICE ELECTRIC AUD GAS COMPANY mouth of Delaware Estuary during August, 1979-1982.

SALEM 316(b) STUDY Figure 3-8

BAY ANC110VY - MAY 100 LEGEND D = 1979 0= 1960 A= 1961 90 x = 1962

...- x

~ 80 zw ~

u x 70 x ~ ~ H P::

~

11..

..._ 60 D

x x

• x x D

~

~ 0 A x

~

1-1 50 x A x x

• x ~ ~ ~

~

0 A

w

.....:i 0 0 D x xx 0 x x D I

~ lJ1 1-1

~ 40 x 0 0 0

~ x x ~ x @ D D D I-'

<I! D x A x ~ x A ~ (;;! D B 1-1

> 0 0 § x 0 A x i

x

~ ~ ):\'.

Iii! D

{.!)

30 x ~

x ~  ;~ ~ D D

e BD

~

D 0 x ~ ~ ~ 19 x A fl!

x

~ A ~

x ~

~ 20 X D 0

~ CJ x El A ~ ~ ~ D I

A D 0 0 A

~ ~ A B

8 i A ~

I e ~ ~

A X D ~ A A A x

10 A

A a 0 M i ~

x A

D ~ A A D 0 D D D & ~ 0 x.

0 0 5 10 15 20 25 30 35 SALINITY (PPT)

Bay anchovy egg viability at various salinities in the Delaware PUBLIC SERVICE ELECTRIC AlID GAS COMPANY Estuary during May, 1979-1982.

SALEM 316(b) STUDY Figure 3-9

BAY ANCHOVY - JUNE 100 LEGEND D= 1979 O= 1980 A= 1981 90 x = 1982 A 0 x D x 0

D D

x A x

x 0 0 8 D A A

0 D A 0 0

50 D x D D x w 0 D A I i1 A l11 40 A 0 0 ~ 0 B ~ x ~ 0 N

0 Q

D g ~ ~ § X 8 0 0 ~

30 D 0 O ~ ~ D ~ ~ ~ ~ § Q 8 ~ 9 O A

§ 0 D 0 0 A A ~ ~ 8 20 D :  : ~ O ~ ~ D ~

0 A 0 0 D El A 0 ~ D 10 A 0

D A Q-l---¥----3--.--G'.._,.,.__..--~-Q---'T--.-~'---.c--r--9--Y---T--S---§-1!!1-ill--il'!--C--lbr--il--fli---fl!l--ir-r-,---til---r--r--r----r--.

0 5 10 15 20 25 30 35 SALINITY (PPT)

Bay anchovy egg viability at various salinities in the Delaware PUBLIC SERVICE ELECTRIC AlID GAS COMPANY Estuary during June, 1979-1982.

SALEM 316(b) STUDY Figure 3-10

BAY ANCHOVY JULY 100 LEGEND D D= 1979 0 O= 1980 D D A= 1981 x D 90 X= 1982 x A A 0 D 0 0 0 0

g BO x 0 o A ~ 8 D O z

r:il x D 0 x

~

0 D u 70 A x

A 0 0

~ A 8 D r:il 0 @ A A 0 11-4 60 0 8 D A 0

~ x A A 0 0 D 0 50 x 0 w

. I U1 w

40 D A D A A A

~ 0 D l!C D X 30

~ ~

0 x

§ 0 A x x i ~

20 D B

D A A

x 0

~

0 10 A A D

0-4--A--~~----:;:Ac....-;i;'-l!il-~-m----ITl---~~~~¥-~--~---ill<--ll!l-'lk--Mlr---&-~-ii!----m--t!1-1;a---.-.....--r--r--.---,----.

0 5 10 15 20 25 30 35 SALINITY (PPT)

Bay anchovy egg viability ~t various salinities in the Delaware PUBLIC SERVICE ELECTRIC AND GAS COMPANY Estuary during July, 1979-1982.

SALEM 316(b) STUDY Figure 3-11

BAY ANCHOVY AUGUST 100 LEGEND D= 1979 O= 1980 A= 1981 90 .x = 1982 0 A

........... 80 A

[--4 x ~

z D ~ A

~ A A 0 A u 70 A

~

~ 0 A 0 A A

P-i

...__,. 60 D D D 0 A 0 A

>-i x

[--4 £ll D

~

50 A 0 0 D

~ A w 1-1 0 A A I H x A U1 1-1 x x x x A 0 ~

0 D 0 ril 40 A 0 x 11.1 0 21

< A A x

~ 0 ~

~

1-1 0 A 0 x

> 30 D 0 x ~

D l8l x ~

A x

~

A

{.) D A x D ~ D ti 0 x

A 0 x ire

~

0 A 0 '6

~ 20 D 0 ~

D D 0 H § ~ x x ~ x D D 0

~ ~ x 0 D ~ D 0 0 l!l x

~

10

~

D H

x 0 i 3E

~

D A

D D ~ i x 0 x ~ 0 0

0 5 10 15 20 25 30 35 SALINITY (PPT)

Bay anchovy egg viability at various salinities in the Delaware PUBLIC SERVICE ELECTRIC AUD GAS COMPANY Estuary during August,1979-1982.

SALEM 316(b) STUDY Figure 3-12

1 3-55

• LARVAE A

3.0 mm TL B c

9.0 mm TL JUVENILE r

l D

30mmTL Bay anchovy larvae (A, B, and C) and PUBLIC SERVICE ELECTRIC AND GAS COMPANY juvenile (D).

SALEM 316(b) STUDY Figure 3-13

BAY ANCHOVY LARVAE 1-MIN. EXPOSURE 17.0-7 16.0-14 15.0-7

,.-... 0 u 14.0- 13

~

0 12 13.0-p;:t

(/) 6 12.0-p;:t 11.0-fl

~ 0 u 10.0-z 1-4 9.0-p;:t 8.0-

~ LU p 7.0- I Ul

~ 6.0- °'

~

p;:t 5.0-P-.

a p;:t 4.0-E-i 3.0-2.0-1.0-0.0- I I I l I I I I 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 ACCLIMATION TEMPERATURE (C)

Mortality of bay anchovy larvae at 24 hr resulting from 1-min exposure PUBLIC SERVICE ELECTRIC AlID GAS COMPANY to various delta temperatures ab6ve acclimation. (Secondary SALEM 316(b) STUDY entrainment data; control' survival > 80 percent).

Figure 3-14

BAY ANCHOVY LARVAE 5-MIN. EXPOSURE 17.0-0 16.0-15.0- 67 11

,-.. 27 BO u 14.0- 60 13.0- 14 ril 0 U) 12.0-ril 7 11.0-

~

u 10.0- 0 z

t--1 9.0-ril B.0-

~ w

> 7.0- I

~

U1 6.0- -...]

~

ril 5.0-P-.

~ 4.0-ril E-4 3.0-2.0-1.0-0.0- I I I T I I I I 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 ACCLIMATION TEMPERATURE (C)

Mortality of bay anchovy larvae at 24 hr resulting from 5-min exposure PUBLIC SERVICE ELECTRIC A?ID GAS COMPANY to various delta temperatures above acclimation. (Secondary SALEM 316(b) STUDY entrainment data; control survival> 80 percent).

Figure 3-15

BAY ANCHOVY LARVAE 15-MIN. EXPOSURE 17.0-100 16.0-15.0- 100 12

..- 14.0- 100 u

...._ 100 13.0- 0 f.:il 27

(/) 12.0- 44

<tl 16 f.:il 11.0-

~

u 10.0- 0 0 z

1-1 9.0-13 9 f.:il 8.0- 15 0

~ 0 w I

0 7.0- Ul

~ 6.0- 25 0

0 00

~

f.:il 5.0-25 P-t 56 13

~ 4.0-f.:il E-t 3.0-2.0-1.0-0.0 I I I I I I I I 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 ACCLI MATI ON TEMPERATURE (c)

Mortality of bay anchovy larvae at 24 hr resulting from 15-min PUBLIC SERVICE ELECTRIC AlID GAS COMPANY exposure to various delta temperatures above acclimation. (Secondary SALEM 316(b) STUDY entrainment data; control survival> 80 percent).

Figure 3-16

BAY ANCHOVY LARVAE 30-MIN. EXPOSURE 17.0-14 16.0-15.0- 100 3 100

..- 14.0-u

'-/

100 13.0- 100 100 r.:c:i 7

([) 12.0- 33.

r.:c:i 11.0- 33

~

u 10.0- 0 20 z 0 13 t-i 9.0-r.:c:i 8.0- 0 21 0

~ 45 0 w

~  ?.0- 22 I 25 U1

~ 6.0-69 13 0

0 l.D

~

r.:c:i 5.0-Pot 36 18 22

21 4.0- 0 0 r.:c:i 11 E-t 3.0-0 2.0- 25 1.0-0.0 I I I I I I I I 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 ACCLIMATION TEMPERATURE (c)

Mortality of bay anchovy larvae at 24 hr resulting from 30-min PUBLIC SERVICE ELECTRIC Alfi GAS COMPANY exposure to various delta temperatures above acclimation. (Second:iry SALEM 316(b) STUDY entrainment data; control survival> 80 percent).

Figure 3-17

BAY ANCHOVY LARVAE - 60-MIN. EXPOSURE 17.0-16.0-15.0-u 14.0-13.0-r:il

(/) 12.0-r:il 11.0-

~

u 10.0- 13 z

1-1 9.0-0 22 r:il 8.0- 38 'C:l 50

~ 30 7 w 0 7.0- 0 I 0

~

0\

6.0- 21 6 0

~ 45 0 r:il 5.0-P-i 11 11 30

~ 4.0- 7 0 30 r.il 10 E-t 3.0-36 2.0- 38 1.0-0.0 I I I I I I I I 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 ACCLIMATION TEMPERATURE (C)

Mortality of bay anchovy larvae at 24 hr resulting from 60-min PUBLIC SERVICE ELECTRIC AlID GAS COMPANY exposure to various delta temperatures above acclimation. (Secondary SALEM 316(b) STUDY entrainment data; control survival> 80 percent).

Figure 3-18

• ~ _J

BAY ANCHOVY LARVAE 180--M IN. EXPOSURE 17.0-16.0-15.0-u 14.0-

µ:i

[/)

13.0-12.0-

~

ril 11.0-

~

u 10.0-z 1-4 9.0-ril 8.0-

~

0 7.0-

~ 6.0-

~

ril 5.0-P-t

~ 4.0-ril E-4 3.0-2.0- 10 1.0-0.0 I I I T l I I I 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 ACCLIMATION TEMPERATURE (C)

Mortality of bay anchovy, larvae at 24 hr resulting from 180-min ..

PUBLIC SERVICE ELECTRIC AND GAS COMPANY exposure to various delta temperatures above acclimation. (Secondary SALEM 316(b) STUDY entrainment data; control survival> 80 percent).

Figure 3-19

BAY ANCHOVY LARVAE - 240-MIN. EXPOSURE 17.0-16.0-15.0-u 14.0-13.0-J";i::l

'(/) 12.0-J";i::l 11.0-

~

u 10.0-z 1--1 9.0-J";i::l 8.0- 27

~ 30 w I

p 7.0- O"\

0

~

N 6.0-

~ 11 J";i::l 5.0-P-i 33 38 36

~ 4.0-J";i::l rl E-t 3.0- 33 2.0-1.0-0.0 I I I I T I I I 17.0 18.0 19.0 20,0 I 21,0 22.0 23.0 24.0 25.0 ACCLIMATlON TEMPERATURE (C)

Mortality of bay anchovy larvae at 24 hr resulting from 240-min PUBLIC SERVICE ELECTRIC AUD GAS COMPANY* exposure to various delta temperatures above acclimation. (Secondary SALEM 316(b) STUDY entrainment data; control survival > 80 percent).

Figure 3-20

• BAY ANCHOVY I-IEAT SHOCK 22.0-20.0- 100

.....-. 18.0-0

....._, 100 ri1 16.0-(/)

<: 100 ri1 14-.0- 30

~ 100100 0

z 1-4 12.0- 40 80100 60 ri1 40 97100

~

10.0- 30 10 100 ~§ 100 w

E-t I 100

<: B.0-20 O'\

w

~ 100 90 60 90 ri1 0 11.. 6.0- 4.4

~ 20 20 ri1 4.0-E-t 0 2.0-0.0 I I I I l r I I I I I 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0 30.0 ACCLIMATION TEMPERATURE (C)

\ The 24 hr percentage mortality of juvenile :and adult bay anchovy subjected to sudden temperature increases. Data points selected were PUBLIC SERVICE ELECTRIC AlID GAS COMPANY .

those for which control mortality was < 20 percent.

SALEM 316(b) STUDY n;:ir<> ~011r,..e * 'P~E,1;,r. lcl7Rh.

Fi!!ure 3-21

BAY ANCHOVY COLD SHOCK 20.0-100 100 100 78 11 u

...._,, 100 15.0- 10 50 100 r:il 100

'(/) 50 100 40

<11 100 60 r:il 90 100 50 25 0 78 70

~ 100 48 20 u 37 20 r:il 0 0

~ 75 5 10.0- 5 20 11 10 r:il 200

~

20 0 11 0 9 0 11 w

J 80 0 10 20 30 I

~ 35 80 100 0 11 0

10 (J\

,p.

~ 0 5 r:r.:i 10 P-i 5.0- 50 0 0 0

~

r:il 0 0 E--t 5 10 0 0 8 10 0 0 0.0 I I I I I I 0.0 5.0 10.0 15.0 20.0 25.0 30.0 ACCLIMATION TEMPERATURE (C)

The 24 hr percentage mortality of juvenile and adult bay anchovy PUBLIC SERVICE ELECTRIC AlID GAS COMPANY subjected to sudden temperature dee reases. Data points selected were those for which control mortality was < 20 percent.

SALEM 316(b) STUDY n,,r,, sour..-e: "P!=:E&r! 1Q7Rb* Melrlrim 1q7q_

Figure 3-22

BAY ANCHOVY SALINITY TOLERANCE 15.0-14.0-13.0- 30 0

E-t 12.0-P-t P-t

...__, 11.0-30 10.0- 0

~

rn

~

9.0-

~ 6.0- 100 u 100 100 r:i::i 7.0- BO 27 100 0 16 w I

6.0- 100 13 10 BO

~ 100 90 10 °'

lJl E-t 13 30 40 5.0-z 1-f 1-f 80 7

0 0

4.0-

~

rn 3.0- 60 0

10 2.0- 0 1.0- 60 0.0 I I I I I I I I I I I I I I I 1 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 6.0 9.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 ACCLIMATION SALINITY (PPT)

The 24 hr percentage mortality of juvenile and adult bay anchovy subjected to sudden salinity decreases. Data selected were those for PUBLIC SERVICE ELECTRIC AUD GAS COMPANY which control mortality was < 20 percent. [Results of reflicate tests SALEM 316(b) STUDY were pooled.] Data source: PSE&G, 1978b; Present StudyJ.

Figure 3-23

w I

O'I O'I Bay anchovy, SS mm FL, taken June 23, 1976, with Kyphosis, Lordosis PUBLIC SERVICE ELECTRIC AlID GAS COMPANY and Scoliosis.

SALEM 316(b) STUDY Figure 3-24

-\

• BAY ANCHOVY LARVAE

• I 0.6-b.

b.

0.5- b.

A A

0.4-0.3-w I

O'\

--.J 0.2-0.1-1 1 1 1 1 --.----.--.c--..--.1 O.O-+--.---.---r---..--r_,.--.c--.---.---~---.--.r~.--..--~--r---.~..--..--~--..---.~..--..--~,--.---.~.--..--~

0 500 1000 1500 2000 2500 3000 3500 MEAN NUMBER OF :fOOD ORGANISMS PER LITER The growth rate of bay anchovy larvae at different food concentrations.

PUBLIC SERVICE ELECTRIC AlID GAS COMPANY Data source: Saksena and Houde (1972).

SALEM 316(b) STUDY Figure 3-25

BAY ANCHOVY 100.0-90.0-b.

80.0-b.

~

~ 70.0-

~

...._ /

60.0-lJ::

E--i

(.!)

z r£I 50.0-

....:I w I

40.0- (J\

~ co

~

0 30.0-

~

20.0-10.0-0.0 I I I I I I I I I I I 0 5 10 15 20 25 30 35 40 45 50 55 AGE (MONTHS)

Mean monthly length, +one standard deviation, 95% C.I. of mean and range PUBLIC SERVICE ELECTRIC AND GAS COMPANY of bay anchovy, by age,from lower Delaware River (rkm 64-97).

SALEM 316(b) STUDY Figure 3-26

3-69

• 100.0 BAY ANCHOVY 90.0 80.0  !::.

70.01 A A

,.....,. A

~  !::.

~

~ 60.0  !::.

AA

~

E-t

~

zr:r:i 50.0 i-::1

~

~ 40.0 0

~

30.0 Lco = 68.435 20.0 K= 2.632 t 0 = -0.012 10.0 0.0-1,~......r-O"T"..,-,-,--r~-,-,---r-""r-r-T'"'T"'T"""T""'......,..........,...-.......-.-.......,.-,.......-.~~~~~~---

o 1 2 3 4 AGE (YEARS)

I

' Von Bertalanffy growth function for bay PUBLIC SER.VICE ELECTRIC A.'ID GAS COMPA.'N anchovy, based on present-study otolith SALEM 316(b) STUDY data.

I Figure 3-27 I

SPRING SUMMER FALL-WINTER MOVEMENT MOVEMENT c::::::r. LARVAE ANO JUVENILES <=-! ADULTS AND JUVENILES

....... ADULTS (Late Foll-Early Winter)

SPAWNING AREA DISTRIBUTION DISTRIBUTION

~ ~ LARVAE, JUVENILES hi.:):,) ADULTS AND JUVENILES AND AD.LILTS (Winter)

NJ NJ w

I

-...]

0 OVERWINTERING IN DEEP BAY WATERS OR NEAR-SHORE OCEAN Principal spawning area and seasonal distribution of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY in the Delaware Estuary.

SALEH 316(b) STUDY Figure 3-28

BAY ANCHOVY 50.0 0

r.:i::i U) 4.5,0.

40.0

~

0

..__,. 35.0

~

~ 30.0 r:i::i P-t U) 25.0

a

..... w I

ls:

U) 20.0 --.J f-'

H

<!l 15.0 0

..... A E-c

..... 10.0

~

0 5.0 0.0 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0

• rn.o 20.0 22.0 A CCLI MATI ON TEMPERATURE (C)

Relationship between critical swim speed of bay anchov~ and acclimation PUBLIC SERVICE ELECTRIC AND GAS COMPANY temperature. Regression equation is Y=6.69 + l.46X (r =0.78).

From Terpin et al., 1977.

SALEM 316(b) STUDY Figure 3-29

~

4-1 I

SECTION 4.0 POPULATION 4.1 STRUCTURE 4.1.l Sex Ratio Although observed sex ratios of bay anchovies vary with location, time of year, size and maturity stage, it appears that females generally outnumber males. Stevenson (1958) reported a significantly greater (p<0.05) proportion of female bay anchovy in Delaware Bay during June and July, 1955-56. All of these females were either developing or spent. He noted that, in a single collection containing over 200 females, all near ripe, the number of males and females did not depart significantly from a 1:1 sex ratio.

This suggested to him that as spawning time draws near, the sex ratio becomes approximately equal . . Similar conclusions can be drawn from data obtained during the present study.

In the Artificial Island region females outnumbered males

~rior to spawning in March (1:1.56, n=64, p>D.05), April (1:1.54, n=236, p<0.01), and May (1:1.55, n=265, p<0.01)

(spawning typically begins during late May). As the spawning season progressed, the sex ratio was nearly 1:1 -

June (1:095, n=l48, p>0.05), July (l:0.95, n=287, p>0,05) and August (1:1.08, n=250, p>0.05). Thereafter, females again predominate (Table 4-1). However, data reported by Kurtz (1977; 1978) for Barnegat Bay, NJ suggest no similar equalizing of sex ratios during spawning. Females outnumbered males in all months, significantly so in all months except November.

A predominance of females has also been reported in at least one other anchovy species. Klingbeil (1978) reported that in the northern anchovy, Engraulis mordax, sex ratios when calculated on a seasonal, monthly, or daily basis nearly always favored females. He believed that the mechanisms of meiosis and fertilization were not consistent with production of any sex ratio other than 1:1, therefore, departures from 1:1 must result from some type of sampling bias. He noted that the commercial landings suggested an overall sex ratio of 1:1.6 while results from the C~lifornia Department of Fish and Game sea surveys, with a much greater areal and temporal coverage, was 1:1.03. This, and other data, suggested to him, that there were large scale temporal and spatial differences in sex composition with loose segregation by sex and that the overall sex ratio was likely very near 1:1. This would be consistent with the observations in bay anchovy that sex ratios are nearly 1:1 at spawning times

• I

4~2 4.1.2 Age Composition Age-composition data for estuarine and coastal stocks of bay anchovy are generally lacking except as inferred from length-frequency data. Data suggest that bay anchovy has a short life span of three years or less. Stevenson (1958), Kurtz (1977: 1978) and EA (1976) identified probable age 2+

specimens in collections also containing ages O+ and/or l+

from Delaware Bay, Barnegat Bay, NJ and Indian River, DE, respectively. Gunter (1945) reported that in bays and coastal waters of Texas, two year-classes of bay anchovy were present all year while a third was present seasonally.

Results of otolith analysis of bay anchovy collected during the present study between mid-April and July 1983 indicated the presence of four distinct year classes (see Sections 1.3.4 and 3.7.3 for further information).

4.1.3 Size Composition Size composition of bay anchovy from various locations including Delaware Bay are given by Stev~nsort (1958), Hoese (1973), EA (1976), Brundage et al. (1976), Setzler (1977),

Kurtz (1977: 1978), Schwartz et al. (1979a), Kaufman et al.

(1980) and others. The length-frequency distribution of 314,558 bay anchovy collected in the Delaware River estuary (rkm 0-117) by trawl, seine and gill net during the present study, 1970-1982, is summarized in Figure 4-1. Size composition of bay anchovy varied seasonally. From March through June the population consisted of a single mode with monthly mean size between ca. 58-65 mm FL: specimens ranged primarily between 40-85 mm FL. From July through December the size distribution was bimodal with the smaller mode reflecting recruitment of young-of-year fish.

Spatial differences.in bay anchovy length-frequency distribution may be inferred from present study data.

Comparison of length-frequency distribution from 1970-1978 rkm 64-97 collections (Fig. 4-2) to that derived from 1979-1982 rkm 0-117 (Fig. 4-3) indicates a predominance of larger fish in April, May and June in the baywide collections (rkm 0-117). Since most collections were from the bay, and the number of years involved minimizes year-class strength differences, this size distribution shift suggests that larger fish are in greater abundance downbay (rkm 0-64).

The annual baywide (rkm 0-117) length-frequency distributions for the period 1979-1982 including from 8,970 to 52,066 bay anchovy collecied by fixed-frame and 4.9-m I

I

4-3 trawl are presented in Figures 4-4 through 4-9. Note that generally smaller fish were taken in the water column by fixed frame net than near the bottom by 4.9-m trawl (Figs. 4-6 through 4-9). This distribution may occur because 1) smaller mesh was used in the inner liner of the cod end of the fixed frame net, hence smaller fish were retained, 2) smaller fish may be generally more pelagic than older and larger fish and/or 3) avoidance by larger fish of the fixed frame gear may be greater than of the bottom trawl.

The baywide (rkm 0-117) length-frequency distribution of larvae collected by 0.5-m plankton net during 1979 through 1982, is summarized in Figures 4-10 to 4-17. Continuous production and recruitment to the gear of smaller specimens (ca. 2 to 4 mm TL) is apparent between mid-May and late August. Length-frequency of larger specimens (ca. 8 to 20 mm TL), particularly in September and October, may be biased as a result of gear avoidance. Larger fish are better able to react to visual and hydrostatic cues produced by the gear (see Appendix I, Section 5.3 for a general discussion of sampling bias).

4.2 ABUNDANCE AND DENSITY 4.2.1 Aver~ge Abundance Few studies have estimated the size of bay anchovy populations; most have presented average density by life stage (see Section 4.2.3). However, McFadden et al. (1978) reported on size of populations in the Hudson River Estuary during the period 1974-1976 and gave the following maximum standing crop estimates: number of eggs ranged from 8.3E9 to 6.3El0, number of yolk-sac larvae from 3.0E9 to 5.SE9 and number of juveniles from 4.7E8 to 5.0ElO. Additionally, Polgar et al. (1979) estimated the eggs, larval and juvenile populations in the Potomac River to be 7.3El0, 5.2E8 and l.SE8, respectively. In the present study, the number of eggs produced between rkm 0-117 for 1979, 1980, 1981, and 1982 was 6.9, 11.~, 8.1 and 8.9El3r respectively.

4.2.2 Changes in Abundance Derickson and Price (1973) reported large short-term changes in abundance of fish collected in Rehoboth and Indian River Bays (DE) during 1968 and 1969. Estimates of average biomass of bay anchovy in 1968 and 1969 in Rehoboth Bay were 73 and 0 kg, respectively and in Indian River Bay 212 and 3 kg, respectively.

4-4 Marcellus (1972) reported a biennial fluctuation in relative abundance of seine caught anchovy in Barnegat Bay, NJ during the period 1966 through 1970.

4.2.3 Average Density The average density of bay anchovy, by life stage, for a variety of estuarine and coastal locations between Mystic River, CT and Georgia is summarized in Table 4-2. In the present study, the temporal and spatial distributions of eggs, prolarvae (l.0-3.0 mm TL), postlarvae (3.1-20.0 mm TL), age 0+ (juveniles), and l+ and older specimens taken baywide (rkm 0-117) in the Delaware Estuary were determined.

During 1979-1982, eggs were typically taken in ichthyoplankton collections from May through October, but were most abundant from late May through July (Tables 4-3 through 4-6; Figs. 4-18 through 4-68). Two density peaks were usually evid~nt; one occurring in late spring and the other in summer (Figs. 4-69 through 4-72). Maximum tota~

study area mean density per year ranged ~ram 17,890/lOOm in late May 1979 (Table 4-3) to 25,390/lOOm in July 1981 (Table 4-5). Densities were highest downbay between rkm 0-48, gradually decreased between rkm 48-80, and were lowest between rkm 80-117 in the lower river (Figs. 4-73 through 4-76).

During 1979-1982 bay anchovy prolarvae (1.0-3.0 mm TL) were generally taken in baywide collections from late April through October, but were most abundant from late May through early August (Tables 4-7 through 4-10: Figs. 4-77 through 4-126). Total study area mean density peaked in 3

May, June or July at densities ranging from 131 to 645/lOOm (Tables 4-7 through 4-10; Figs. 4-127 through 4-134).

Although prolarvae were taken throughout the study area (rkm 0-117), regional mean densities were typically highest in the mid- and upper bay, and lower river between rkm 32-97.

Bay anchovy postlarvae (3.1-20.0 mm TL) were generally taken in baywide ichthyoplankton collections between late April and October (1981, 1982) or November (1979, 1980), but were most abundant between late June and early August (Figs. 4-135 through 4-190). The maximum total study area mean density oc3urred in July or August and ranged from 273 to 1,114/lOOm (Tables 4-11 through 4-14: Figs. 4-191 through I

4-5 4-194). As with prolarvae, bay anchovy postlarvae were taken throughout the study area (rkm 0-117) during 1980-1982, but are typically most abundant in the mid-bay to lower river regions through ca. rkm 97 (Figs. 4-195 through 4-198). However, in 1979 highest mean densities occurred in the upper reach (rkm 64-117) of the study area. -

The higher density of eggs in the downbay regions vs the greater density of prolarvae and postlarvae in more northern reaches may be the result of net upstream transport on the non-tidal subsurface flows described by Pape and Garvine (1982) and Weston (1983) for the bay and lower river, respectively (see Appendix I, Section 4.1.3). Greater hatching success in the rkm 48-80 reach or greater survival of larvae, perhaps due to fewer predators, could also account in part, for the observed larval density distributions.

During the present study three types of gear (surface and bottom 4.9-m otter trawl and pelagic fixed-frame net) were used to collect bay anchovy 0+ and older. The rationale for gear type and scheduling for each year (1979 through 1982) is presented in Appendix I, Section 5.4. Additionally, for purposes of determining average density of 0+ as distinct from l+ and older specimens, an estimate of maximum monthly size limits was made based on inspection of the length-frequency data (Fig. 4-1): between May and April monthly limits for 0+ fish were 20, 30, 45, 48, 54, 58, 62, 62, 65, 65, 68, 68 mm FL, respectively. Comparing these values to the mean size at age developed from the growth equation (Section 3.7.3) shows that the estimates are reasonable upper size breaks.

Bay anchovy juveniles (O+ specim~ns) were typically taken in the baywide study area (rkm 0-117) between July and October during 1979-1982 (Figs. 4-199 through 4-283). Highest total study area mean density in su3face collections occu3red in August, ranging from 7.0/lOOm in 1979 to 33.3/lOOm in 1982: maximum mean density in bottom collections occur3ed annually in Augus~ or September, ranging from 6.2/lOOm in 1980 to 10.9/lOOm in 1981 (Tables 4-15 through 4-21: Figs.

4-284 through 4-290.

Bay anchovy 0+ were distributed throughout the total study area (rkm 0-117) during periods of occurrence. However, they were typically less abundant in deeper offshore waters of the mid- to lower bay (ca. rkm 0-48) than in the rest of the study area (Figs. 4-199 to 4-283). No other annually recurring pattern of abundance was apparent during the study period (Figs. 4-291 through 4-297).

I I

4-6 Bay anchovy adults (l+ and older specimens) were taken in all months sampled during 1979-1982; they were most abundant in the study area between May and early August (Figs. 4-298 through 4-413). Highest total study area mean density in surface collections occurre~ annually in mid-May to early 3

June, ranging from 5.0/lOOm in 1981 to 5.4/lOOm in 1982; maximum mean density in bottom collections occur~ed between late-May and early August, ranging from 3.3/lOOm in 1982 to 6.6 in 1979 (Tables 4-22 through 4-28; Figs. 4-414 through 4-420).

As with age O+ bay anchovy, l+ and older specimens were distributed throughout the study area (rkm 0-117) during periods of occurrence. However, densities varied regionally, typically being lower near the mouth of the bay, particularly from rkm 0-16, and higher in the mid- to upper bay and the lower river (Figs. 4-421 through 4-427). In the bay they were generally more abundant in the shallower nearshore waters than offshore (Figs. 4-298 through 4-413).

4.2.4 Changes in Density Catch-per-unit-effort (CPUE) data suggest that the bay anchovy population in the Delaware Estuary experiences considerable annual variation in either absolute or localized abundance or in recruitment from nearby coastal waters. In the lower Delaware River near Artificial Island (rkm 64-97), annual trawl CPUE ranged from 29.2 in 1971 to 102.2 in 1976 (PSE&G, 1979a). Approximately two-fold increases in annual CPUE were observed between 1973 and 1974 and between 1975 and 1976. Additionally, semimonthly means, presented in Figure 4-428, demonstrate the seasonal variation in bay anchovy in the Artificial Island region.

N-0 long-term trend in CPUE was apparent in present-study data, however.

Density of bay anchovy eggs and larvae varied greatly from year-to-year during the present study. For example, during 1976, 1977 and 1978 annual mean density of eggs near Artificia~ Island (rkm 64-97) was approximately 3.4, 13.7 and 0.5/m 3 , respectively; for larvae it was about 1.7, 10.9, and 1.4/m, respectively (PSE&G, 1978a).

4.3 NATALITY AND REPRODUCTION 4.3.1 Reproduction Rate Fecundity estimates for bay anchovy are discussed in Section 3.1.5. Egg production, estimated for the Delaware Bay during the present study, are presented in Section 4.3.3.

4-7 4.4 MORTALITY AND MORBIDITY 4.4.1 Mortality Rates Eggs The daily instantaneous total mortality rate (Za) for bay anchovy eggs in the Delaware River near Artificial Island (rkm 64-97) was calculated using egg viability data (Section 3.1.6) (Present Study). During 1974-1977 survival ranged from 0.1715 to 0.2792. Assuming a 24 hr hatching time, this corresponds to a daily instantaneous total mortality rate (Za) of 1.76317 to 1.27583. This mortality rate is somewhat greater than the Zd of 1.1254 calculated for black sea anchovy (Engraulis encrasicholus) eggs using data from Dekhriik (1963) and Nikolskii (1969) (cited in Dahlberg, 19 79).

Larvae Mortality estimatec. have not been reported for bay anchovy prolarvae. The short duration of this stage (ca. 2 days:

Section 3.3.1) and the longer interval between sampling dates during the present study (4+ days: Appendix I) precluded finding a rate of decline in mean density. A mortality estimate for a related engaulid, the black sea anchovy, prolarval stage, however, can be derived using data from Dekhnik (1963) and Nikolskii (1969) (cited in Dahlberg, 1979): a Zd of 0.6398 is calculated using this data and may be a reasonable estimate for bay anchovy mortality.

The daily instantaneous mortality rate for bay anchovy post-larvae in the lower Delaware River near Artificial Island (rkm 64-97) was calculated by apslying catch curve analysis (Ricker, 1975) to the mean density of postlarvae (3-20 mm.

TL) taken with a 0.5 m plankton net during daylight, 1973-1978 (Present Study). Daily instantaneous total mortality Zd ranged from 0.07277 to 0.09846 with a mean of 0.08483 (Table 4-29).

Adults I The daily instantaneous total mortality rate for bay anchovy adults (l+ and older) in the lower Delaware River near Artificial Island (rkm 64-97) was calculated using year class data from otolith analysis during April-August 1983 J

l

4-8 (Present Study) and applying the Robson-Chapman method (Appendix I). A Za was calculated for each month and ranged from 0.00310 to 0.00571 with a mean of 0.00445 (Table 4-30).

This rate is comparable to the Z0 of the northern anchovy (E. mordax) calculated as 0.00265 using survival data reported by Hanan (1981) (Table 4-31).

4.4.2 Factors Causing or Affecting Mortality Larvae Houde (1977) studied the effects of food concentrations and stocking density on survival of larval bay anchovy. Eggs were stocked at densities ranging from 0.5-32/1 (35-2, 240/test) and the hatch was fed natural plankton in concentrations ranging from ca. 50-5,000/1. Percent survival generally increased with increased food concentration. Food concentrations of ca. 50-60/1, 800-1,200/l and 4,000-5,600/l resulted in survival rates of 0.0-40.0, 17.9-63.7 and 47.7-74.8 percent, respectively. While the effect of stocking density was not statistically significant, there was a tendency for decreased survival at highest stocking rates.

Juvenile and Adult Very little information was available in the literature.

However, reports of several bay anchovy kills in a creek off Bayboro Harbor, FL following passage of a large barge, were noted by Springer and Woodburn (1960). They suggested that hydrogen sulphide released from disturbed muddy bottom sediments was responsible. Renfro (1963) reported bay anchovy among the fish killed in Galveston Ship Channel (TX) by gas bubble "disease" due to gas supersaturation of the water during a phytoplankton bloom.

4.6 THE POPULATION IN THE COMMUNITY AND THE ECOSYSTEM Bay anchovy is an abundant forage fish in the Delaware Estuary. Its small size, early maturation and production of large numbers of offspring categorize it as a "classic r-selected" species (McFadden et al., 1978). According to Horst (1977) populations of this type, living well below I

carrying capacity in a typically fluctuating environment, 1

I

4-9 are opportunistic and efficient reproducers. Additionally, a high intrinsic growth rate should allow bay anchovy to withstand heavy exploitation and adjust quickly to changes in the level of resources in the estuarine environment (McFadden et al., 1978).

Bay anchovy are found in both the planktonic and pelagic communities, and are an important link in energy transfer between trophic levels. They consume and convert biomass of small plankters and in turn are fed upon by predators such as weakfish, bluefish and flounder: early life stages may also be utilized by invertebrates such as jellyfish, ctenophores and carnivorous copepods.

Bay anchovy abundance is likely controlled by interspecif ic competition and predation (McFadden et al., 1978). Blueback herring (Burbidge, 1974), juvenile alewife and white perch (McFadden et al., 1978) and young sand seatrout (Sheridan, 1979) have been reported as competitors or potential competitors of bay anchovy for available zooplankton resources (see Section 3.5.3). Specific rates of increase (and survival) are also strongly influenced by physical factors (Miller, 1969) such as salinity gradients (Weinstein et al., 1980). Interspecific competition fo~ available resources may be lessened by partitioning within the community via trophic relationships and/or temporal successions (Sheridan, 1978: Setzler, 1977: Subrahmanyam and Coultas, 1980).

Pacheco and Grant (1965) reported significant positive associations between bay anchovy and menhaden, Atlantic silversides and tidewater silversides. Wenner et al. (1982) employed cluster analysis to define assemblages of fish and decapod crustacea collected in the North and South Santee rivers, SC during 1975 and 1976. They found that bay anchovy were significantly associated with white catfish, hogchoker, Atlantic croaker, spot, white shrimp, silver perch, weakfish, star drum, brown shrimp, blackcheek tonguefish, blue crab, southern flounder, Atlantic menhaden, and grass shrimp. Holt and Strawn (1983), also using cluster analysis, found bay anchovy larvae and juveniles in association with larval and juvenile Gulf menhaden, Brevoortia patronis, and brachyuran zoeae at water temperatures < 22°C in Trinity and Galveston Bays, TX.

I.

r

(

4-10 Table 4-1 2

Summary of bay anchovy sex ratio data and chi-square (x ) test results for departure from 1:1 ratio (df=l).

Sex Ratio Month/Season N (Male:Female) x2 Barnegat Bay, NJ (data source - Kurtz, 1977; 1978)

January 1 March 842 1 :1.06 0.628 April 766 1:1.16 4.242*

May 999 1:1.39 26.270**

June 1,046 1:1. 70 69.179**

July 1,290 1:1.35 28.280**

August 1,056 1:1.39 28.342**

September 583 1:1.72 40.679**

October 944 1:1.19 6.950**

November 273 1:1.22 2.476 December 105 1:1.56 4.610*

Winter (D-F) 106 l:L52 4.160*

Spring (M-M) 2,707 1:1.11 7.660**

Summer (J-A) 3,392 1: 1.1~6 118.875**

Fall (S-N) 1,800 1: 1.34 38.427**

Lower Delaware River (rkm 64-97); (data source - Present Study)

March 64 1:1.56 2. 641 April 236 1:1.54 10 .174**

May 265 1 :1.55 11.834**

June 148 1:0.95 0.061 July 287 1:0.95 0.125 August 250 1:1.08 0.324 September 223 1:1.21 1.794 October 158 1:1.32 2.791 November 112 1:1.33 2.009 December 37 1:2.36 5.297*

Winter (D-F) 37 1:2.36 5.297*

• Spring (M-M) 565 1:1.55 25.487**

Summer (J-A) 685 1:1.00 o.ooo Fall (S-N) 493 1:1.27 6.824**

• p<0.05

• • p~0.01

• Location Summary of bay anchovy density at various locations.

Period Hean Density Sampling Gear Reference EGGS 3

Hud*on River E*tuary, NY June-August 29176/1000m Ep!benthic sled and/or McFadden et al., 1978 Tucker Trawl 3

Yew Jersey coastal waters June-August 6681/ lOOOm 36 cm. bongo net Sviecicki and Tatham, 1977 Little Egg Inlet Indian Rlver Estuary, DE May-September 446 .9/100 * .3 0.5 11. plankton net F.A, 1976 3

Lower Chesapeake Bay ~y-August 320--1400/10m 18.5 cm bongo net Olney, 1983 3

Lover Chesapeake Bay April-October 7563/1000m 0.5 m plankton net ~artin Marietta, 1980 Potomac Rlver Estuary Period of occurrence 89. 5/ lOOon.3 1.0 m plankton net Polgar et al., 1979 L.All.VAE 3

~ystic River Estuary, CT Jnly-Augus t 0.1/~ surface 0.5 11. plankton net Pearcy and Richards, 1962 0.8/m bottom 3

Hudson.River Estuary, NY June-August 5131/1000m Epibenthic sled and/or McFadden et al., 1978 Tucker Trawl

~ev Jeraey coastal waters Ma~ovember 1084/lOOOm 3 36 cm bongo net Swiec1cki and Tatham, 1977 Little Egg Inlet 3 1976 Indian River Estuary, DE !lay-September 129. 5/100m 0.5 11. plankton net iiA, 3

Lower Chesapeake Bay July-August 1098-2403/100m 18.5 cm bongo net Olney, 1983 3

Lover Ch~sapeake Bay April-October 146/1000m 0.5 11. plankton net Hartin Marietta, 1~80 3

Potomac River Estuary Period of occurrence 18.l/lOOOm 1.0 11. plankton net Polgar et al., 1979 JCJVENILES AND/OR ADULTS 3

Hudson River Estuary, NY Period of 1029.08/lOOOm

• Epibenthic sled and/or McFadden et al., 1978 occurrence Tucker Trawl

~ew Jersey coastal waters Annual 501.8 specimens/coll or 25-ft semi-balloon travl, Milstein et al., 1977 Little Egg Inlet 932.9 g/coll ( 15 min tows)

Indian River Estuary, DE Monthly 0-32.l CPUE 50 x 6 ft beach seine or EA, 1976 10 x 4 ft se!lli-bag seine Indlan River Estuary, DE Honthly 3.7-2367.7 CP11E 16 x 4 ft otter or EA, 1976 semi-balloon trawl 3

Lover Chesapeake Bay April-October 322/lOOOm 0.5 m plankton net Hartin Marietta, 1980 3

Potomac River Estuary Period of occurrence 4.9/1000m Polgar et al., 1979 Cape Fear Estuary, NC- 0.01-1.0 CPUE Seine, rotenoac LMS, 1980

.:aa.rshes and shallow waters llorth River Estuary, NC Annual 0.30 CPUE-ditche* Block seine Marshall, 1976 0.05 CPUE-creek Cooper River tidal April O/surface acre Rote none Turner and Johnson, 1974 tributaries, SC July 36/ surface acre September 4083/surface acre Georgia coastal estuaries Annual (0.1 lb/hour 40-ft standard flat Mahood et al., 1974 shrimp trawl

• MaxL:aum. regional mean CPUE g Catch per unit effort

Table 4-3 Population statistics for bay anchovy eggs prior and subsequent to moving-average process:0.5-m plankton net collections, 1979.

t t Prior to Averaging Subsequent to Averaging Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian * . Range of Density Error of of Error ,,f

• of Density 3 Confidence River 3 R2 Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation (x/!OOm ) Limits Kilometers 1979 Mar. 27-30 87.S 11 0 ** 64-117 Apr. 17-20 108.S 40 0 0 64-117 May 1-4 122.5 39 0 0 64-117 May 22-24 143 51 12,617 .48 2,016 114.10 841 47.60 0.829 1. 789. E+4 l.958E+4;1.634E+4 0-117 May 29- .i:::.

Jun. 1 150.5 51 6,329.88 1,662 187. 50 1,073 121.08 0.591 9.069 E+J 1.123E+4;7.425E+3 0-117 I Jun. 5-7 157 51 1,055.15 150 101.48 94 63.34 0.618 1.174 E+3 1.362E+3;9.983E+2 0-117 I-'

Jun. 12-14 164 5,378.42 134 .'25 424 N 72 851 66.89 0.755 4.218 E+3 5.058E+3;3.453E+3 0-117 Jun. 25-29 178 77 4,377 .20 748 149. 98 322 64.65 0.817 5.048 E+3 5.687E+3;4.461E+3 0-117 Jul. 9-12 191.S 71 5,359.82 707 111.10 346 54.39 0.764 5.428 E+3 6.113E+3;4.806E+3 0-117 Jul. 16-20 199 51 4,403.05 764 123. 99 611 100.06 0.362 5.050 E+3 6.289E+3;3.934E+3 0-117 Jul. 24-27 206:5 47 5,215.30 1,292 169.85 1,042 136 .99 0.364 7.508 E+J 9.605E+3;5.751E+3 0-117 Aug. 6-9 219. 5 49 1,683.87 514 213.47 333 138.36 0.589 2.532 E+3 3.202E+3;1.984E+3 0-117 Aug. 20-24 234 57 11.18 3 217.03 2 144 .37 0.565 6.901 E+o l.114E+l;4.372E+o 0-117 Sep. 10-13 254.5 70 4.10 1 257.59 1 123.48 0.774 3.690 E+o 4.889E+o;2.907E+o 0-117 Oct. 15-17 289 79 0 0 0-117 Oct. 29-Nov. 2 304 46 0.17 0 384.14 0 345.74 0.208 1.940 E-1 3.635E-l;l.577E-l 0-117 t

Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

• • Insufficient sample size to estimate density.

Table 4-4 Population statistics for bay anchovy eggs prior and subsequent to moving-average process:0.5-m plankton net collections, 1980.

t Prior to Averagingt Subsequent to Averaging Number Mean Standard Coefficient Standard Coefficient Mean +95%

Size Confidence River of Density Collection Julian

• Range of Density 3

Error of of Error of R2 3 Date (mm) Samples (x/lOOm 2 Mean Variation Mean Variation (x/lOOm 2 Limits Kilometers Period 1980 64-117 23 2 0 **

Jan. 23 0 64-117 Mar. 17-20 78.5 40 0 40 0 0 64-117 Apr. 15-17 107 Apr. 29- 0 64-117 May 2 121.5 40 0 30.14 10 204.89 6 120.09 0.665 2.127 E+l 3.255E+l;l.498E+l 0-117 May 5-7 127 42 ~

7,075.85 1,199 140. 79 502 58.90 0.828 1.133 E+4 1.232E+4;1.049E+4 0-117 May 19-22 141.5 69 0-117 I 68 11,723.69 1,585 111.45 789 55.52 0.756 1.653 E+4 l.810E+4;1.506E+4 t--'

Jun. 2-6 156 0-117 Jun. 9-12 162.5 70 5,801.41 809 116.67 615 88.68 0.431 6.835 E+3 8.053E+3;5.692E+3 w 7, 721.56 1,167 126.43 770 83.38 0.571 8.155 E+3 9.679E+3;6.720E+3 0-117 Jun. 16-20 170 70 9,061.08 1,186 109.54 627 57.92 o. 724 1.082 E+4 1.206E+4;9.621E+3 0-117 Jul. 7-11 191 70 0-117 70 13,086.83 1,912 122.23 1,143 73.09 0.647 1.919 E+4 2.146E+4;1.705E+4 Jul. 14-18 *198 l.607E+4;1.213E+4 0-117 204.5 69 8,365.72 1,562 155.09 1,029 102.19 0.572 1.404 E+4 Jul. 21-24 3.931 E+2 5.528E+2;2.854E+2 0-117 Aug. 4-7 218.5 70 608.13 126 173.87 81 . 111.03 0.598.

25.89 9 285.72 5 171.38 0.646 2.660 E+l 3.725E+l;2.136E+l 0-117 Aug. 18-23 233.5 68 5,95 3 414.38 2 329.14 0.378 3.682 E+o 8.348E+o;2.475E+o 0-117 Sep. 8-12 254 69 2.16 1 519.53 1 258.82 o.756 2.126 E+o 3.486E+o;l.821E+o 0-117 Sep. 22-29 269.5 66 0-117 70 0 0 Oct. 6-10 282 0-117 Oct. 20-27 297.5 58 0 0 0 0 0-117 Nov. 3-7 310 53 t Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

• • Insufficient sample size to estimate density.

Table 4-5 Population statistics for bay anchovy eggs prior and subsequent to moving-average process:0.5-m plankton net collections, 1981.

Prior to Averaging t Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian

• Range of Density Error of of Error of of Density 3

Confidence River 3 R2 Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation (x/lOOm ) Limits Kilometers 1981 Apr. 27-30 118.5 69 0 0 0-117 Hay 11-14 132.5 70 393.75 117 249.21 60 128.13 o.739 3.519 E+2 4.713E+2;2.871E+2 0-117 Hay 18-22 140 68 1,609.45 337 172.44 173 88.74 0.739 1.413 E+3 l.756E+3;1.157E+3 0-117 May 26-28 147 66 2,496.92 385 125. 33 198 64.52 0.739 2.811 E+3 3.204E+3;2.488E+3 0-117 Jun. 8-11 160.5 70 6,159.91 1,005 136.55 516 70.12 0.740 6.271 E+3 7.293E+3;5.355E+3 0-117 if::>

Jun. 15-18 167.5 68 6,335.85 1,279 166.43 832 108. 32 0.583 5.144 E+3 6.792E+3;3.671E+3 0-117 I Jun. 22-26 175 66 5,482.94 1,150 170.46 863 127. 94 0.445 4.866 E+3 6.576E+3;3.503E+3 0-117 f--'

Jul. 6-10 189 71 5,007.26 854 143.73 576 96.88 0.552 5.154 E+3 6.294E+3;4.105E+3 0-117 if::>

Jul. 13-17 196 70 24,134.81 5,224 181.08 4,301 149.10 0.332 2. 539 E+4 3.391E+4;1.756E+4 0-117 Jul. 20-24 203 70 11,212.40 1,647 122.92 995 74.28 0,640 1.335 E+4 1.532E+4;1.163E+4 0-117 Aug. 3-6 216.5 71 5,211.91 967 156.32 662 106.95 0.539 5.745 E+3 7.055E+3;4.745E+3 0-117 Aug. 17-22 231.5 69 44.01 24 452.74 21 392. 78 0.258 4.239 E+l 8.359E+l;2.925E+l 0-117 Aug. 31-Sep. 3 244.5 70 41.23 37 756.07 33 676.80 0.210 9.910 E+l l.651E+2;8.917E+l 0-117 Sep. 14-18 259 70 0.01 0 836.66 n 69J .10 0.324 2.375 E-2 4.706E-2;2.208E-2 0-117 Sep. 28-30 272 70 0 0 0-117 Oct; 12-15 286.5 70 0 0 0-117 t

Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period

• Table 4-6 Population statistics for bay anchovy eggs prior and subsequent to moving-average process:0.5-m plankton net collections, 1982.

Prior to Averaging t Subeequent to Averaging t

Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian

• Range of Density Error of of Error of of Density 3

Confidence River 3 R2 Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation. (x/lOOm 2 Limits Kilometers 1982 Apr. 26-30 118 69 0 0 0-117 ,j:>.

May 11-14 132.5 70 3,162.23 973 246.07 562 142.28 0.671 3.632 E+3 4.746E+3;2.815E+3 0-117 I

~_,

May 17-21 139 70 16,095.03 3,145 163.47 2,626 136.52 0.313 1.962 E+4 2.482E+4;1.513E+4 0-117 lJ1 May 24-27 145.5 70 11,988.58 1,932 134.86 910 63.50 o.'782 1.437 E+4 l.617E+4;1.276E+4 0-117 Jun. 7-10 159.5 69 3,401.75 413 100.89 281 68.62 0.544 4.016 E+3 4.572E+3;3.492E+3 0-117 Jun. 21-24 173.5 70 7,573.60 1,118 ll3.49 727 80.41 0.582 6.481 E+3 7.922E+3;5.199E+3 0-117 Jun. 28-Jul. 3 181.5 70 8,791.13 1,027 97.74 715 68.05 0.522 9.810 E+3 l.123E+4;8.480E+3 0-117 Jul. 12-15 194.5 70 7,289.54 954 109.46 568 65.19 0.651 7.733 E+3 8.857E+3;6.691E+3 0-117 Jul. 19-23 202 70 5,054.33 782 129.41 457 75.69 0.663 5.518 E+3 6.423E+3;4.665E+3 0-117 Jul. 26-29 208.5 70 5,350.00 984 153.93 539 84.24 0.705 5.895 E+3 6.961E+3;4.994E+3 0-117 Aug. 9-13 223 70 323.76 68 176.70 49 127.03 0.491 3.566 E+2 4.539E+2;2.778E+2 0-117 Aug. 23-27 237 70 339.58 80 197.80 58 142. 66 0.487 3.138 E+2 4.285E+2;2.330E+2 0-117 Aug. 30-Sep. 2 243.5 70 256.32 71 251.90 31 100.62 0.843 1.493 E+2 2.104E+2;1.161E+2 0-117 Sep. 20-24 265 69 3.545 1 227.49 1 146.61 0.591 3.900 E+o 5.139E+o;3.102E+o 0-117 Oct. 4-5 277 .s 70 0.254 0 513.62 0 404.03 0.390 2.220 E-1 4.645E-l;l.807E-l 0-117 Oct. 18-20 292 70 0 0 t Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

Table 4-7 Population statistics for bay anchovy prolarvae prior and subsequent to moving-average process:0.5-ro plankton net collections, 1979.

Prior to Averaging t Subsequent to Averaging t Size Number Mean Standard Coefficient Stand I' rd Coefficient Mean +95%

Collection Julian* Range of Density3 Error of of Error of of Density 3 Confidence River Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation R2 (x/lOOm ) Limits Kilometers 1979 Mar. 27-30 87.5 1.0-3.0 11 0 ** 64-117 Apr. 17-20 108.5 1.0-3.0 40 0 0 64-117 May 1-4 122.5 1.0-3.0 39 0 0 64-117 May 22-24 143 1.0-3.0 51 222.881 48 153.196 29 91.528 0.650 2.317 E+2 2.891E+2;1.822E+2 0-117 May 29-Jun. 1 150.5 1.0-3.0 51 55.224 18 231.331 10 131.689 0.682 8.010 E+l l.010E+2;6.551E+l 0-117 ,j:>.

Jun. 5-7 157 1.0-3.0 51 0.664 0 289.221 0 259.894 0.209 4.202 E-1 9.055E-1;2.783E-l 0-117 I I-'

Jun. 12-14 164 1.0-3.0 72 41.167 15 308.246 10 204 .135 0.568 2.890 E+l 4.851E+l;2.146E+l 0-117 CJ'\

Jun. 25-29 178 1.0-3.0 77 63. 710 16 226.667 11 152.324 0.554 3.672 E+l 5.861E+l;2.871E+l 0-117 Jul. 9-12 191.5 1.0-3.0 71 73.584 21 242.064 13 149.911 0.622 6.352 E+l 8.944E+l;5.548E+l 0-117 Jul. 16-20 199 1.0-3.0 51 160.880 38 166.894 23 103. 766 0.621 8.281 E+l l.298E+2;5.519E+l 0-117 Jul. 24-27 206.5 1.0-3.0 47 165.011 59 246.215 47 195.862 0.381 1.298 E+2 2.247E+2;6.627E+l 0-117 Aug. 6-9 219.5 1.0-3.0 49 121.798 32 181.096 26 149. 284 0.335 1.174 E+2 l.696E+2;7.791E+l 0-117 Aug. 20-24 234 1.0-3.0 57 0.272 0 479.858 0 401.591 0.312 2.271 E-1 5.139E-l;l.740E-l 0-117 Sep. 10-13 254.5 1.0-3.0 70 0.148 0 836.660 0 693.103 0.324 3.217 E-1 4.751E-1;2.154E-l 0-117 Oct. 15-17 289 1.0-3.0 79 0.022 0 888.819 0 596.382 0.556 8.261 E-3 3.766E-2;7.844E-3 0-117 Oct. 29-Nov. 2 304 1.0-3.0 46 0 0 0-117 t

Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.*

• • Insufficient sample size to estimate density.

• Table 4-8 Population statistics for bay anchovy prolarvae prior and subsequent to moving-average process:0.5-m plankton net collections, 1980.

t t Prior to Averaging Subsequent to Averaging Standard Coefficient Standard Coefficient Mean +95%

Size Number Mean Confidence River of Density 3 Collection Julian

• Range of Density3 Error of of Error of Variation R2 (x/lOOm Limits Kilometers Date (mm) Samples (x/lOOm Mean Variation Mean Period 1980 64-117 Jan. 23 23 1.0-3.0 2 0 ** 64-117 0 0 Mar. 17-20 78.5 1.0-3.0 40 64-117 0 0 Apr. 15-17 107 1.0-3.0 40 Apr. 29- 529.813 0.316 3.921 E-1 4.466E-1;3.422E-l 64'-117 121.5 1.0-3.0 40 0.032 0 632.455 0 May 2 0 493.795 0.434 2.003 E-2 5.461E-2;1.783E-2 0-117 May 5-7 127 1.0-3.0 42 0.022 0 648.074 221.574 28 161.522 0.476 1.785 E+2 2.347E+2;1.366E+2 0-117 ~

May 19-22 141.5 1.0-3.0 69 145.961 39 I 217. 736 25 116.229 0.719 1.596 E+2 2.082E+2;1.232E+2 0-117 .....

Jun. 2-6 156 l.0-3.0 68 174.092 46 0-117 47 346. 727 31 228.142 0.573 6.764 E+l l.293E+2;4.333E+l -J Jun. 9-12 162.5 1.0-3.0 70 114.260 0-117 20 197. 662 16 158.357 0.367 7.040 E+l l.028E+2;4.791E+l Jun. 16-20 170 l.0-3.0 70 86.414 0-117 99 175.119 71 124.617 0.501 2.796 E+2 4.196E+2;1.808E+2 Jul. 7-11 191 1.0-3.0 70 474.562 7.557E+2;4.754E+2 0-117 806.761 129 133 .883 76 78.483 0.661 6.058 E+2 Jul. 14-18 198 1.0-3.0 70 7.800E+2;5.206E+2 0-117 547.537 108 163.258 68 103.469 0.604 6.450 E+2 Jul. 21-24 204.5 1.0-3.0 69 l.582E+2;6.470E+l 0-117 47 207.232 35 157.658 0.430 8.807 E+l Aug. 4-7 218.5 1.0-3 .o 70 187.940 3.403 E+o 7.501E+o;2.662E+o 0-117 68 9.410 3 255.051 2 181.355 0.502 Aug. 18-23 233.5 1.0-3.0 1.197 E-1 2.742E-l;l.002E-l 0-117 69 0.253 0 317.403 0 256.347 0.357 Sep. 8-12 254 1.0-3.0 7.806E-2;1.992E-2 0-117 0.038 0 812 .404 0 613.986 0.438 2.137 E-2 Sep. 22-29 269.5 l.0-3.0 66 0-117 0 0 Oct. 6-10 282 1.0-3.0 70 0-117 0 0 Oct. 20-27 297 .5 1.0-3.0 58 0-117 0 0 Nov. 3-7 310 l.0-3.0 53 t Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

• • Insufficient sample size to estimate density.

Table 4-9 Population statistics for bay anchovy prolarvae prior and subsequent to moving-average process:0.5-m plankton net collections, 1981.

Prior to Averaging t Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian

• Range of Density 3 Error of of Error of of Density 3 Confidence River Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variat.ion R2 (x/lOOm ) Limits Kilometers 1981 Apr. 27-30 118.5 1.0-3.0 69 0 0 0-117 May 11-14 132.5 1.0-3.0 70 0 0 0-117 May 18-22 140 1.0-3.0 68 2.334 2 563.258 1 395.494 0.514 1.127 E+o 3.343E+o;9.498E-l 0-117 May 26-28 147 1.0-3.0 66 0.055 0 676.553 0 518.Ci91 0.422 2.573 E-2 9.514E-2;2.231E-2 . 0-117 Jun. 8-11 160.5 1.0-3.0 70 18. 495 7 315.293 5 239.732 0.430 8.606 E+o l.910E+l;5.898E+o 0-117 Jun. 15-18 167 .5 1.0-3.0 68 22.332 8 311.883 5 168.699 0.712 1.647 E+l 2.552E+l;l.381E+l 0-117 Jun. 22-26 17 5 1.0-3.0 66 225.689 80 287.327 50 178.890 0.618 1.311 E+2 2.295E+2;1.022E+2 0-117 Jul. 6-10 189 1.0-3.0 71 82.119 26 265.381 20 204.278 0.416 6.633 E+l l.057E+2;4.896E+l 0-117 .P>

86.414 I Jul. 13-17 196 1.0-3.0 70 20 197.662 16 158.357 0.367 7.040 E+l l.028E+2;4.791E+l 0-117 I-'

Jul. 20-24 203 1.0-3.0 10 110.804 24 181.112 15 112 .812 0.618 1.138 E+2 1.434E+2;8.733E+l 0-117 ())

Aug. 3-6 216. 5 1.0-3.0 71 115.818 32 232.412 24 174.198 0.446 1.269 E+2 1.743E+2;8.873E+l 0-117 Aug. 17-22 231.5 1.0-3.0 69 4.616 2 331.945 l 262.629 0.383 4.443 E+o 7.332E+o;3.359E+o 0-117 Aug. 31-Sep. 3 244.S 1.0-3.0 70 0.298 0 545 .351 0 413.879 0.432 1.274 E-1 4.196E-1;1.028E-l 0-117 Sep. 14-18 259 1.0-3.0 70 0 0 0-117 Sep. 28-30 272 1.0-3.0 70 0.116 0 836;660 0 693.103 0.324 6.980 E-2 2.603E-1;6.490E-2 0-117 Oct. 12-15 286.5 1.0-3.0 70 0 0 0-117 t Averag.ing indicates moving average process (three nearest neighbors).

• Midpoint of collection period *

• Table 4-10 Population statistics for bay anchovy prolarvae prior and subsequent to moving-average process:0.5-m plankton net collections, 1982.

Prior to Averaging t Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian

• Range of Density3 Error of of Error of of Density 3 Confidence River Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation R2 (x/lOOm ) Limits Kilometers 1982 Apr. 26-30 118 1.0-3 .o 69 0 0 0-117 May 11-14 132.5 1.0-3.0 70 0.388 0 505.035 0 354.091 0.516 3.420 E-1 6.823E-1;2.763E-l 0-117 May 17-21 139 1.0-3.0 70 77 .568 24 259.584 15 164.601 0.604 8.286 E+l l.131E+2;6.640E+l 0-117 May 24-27 145.5 1.0-3.0 70 181.524 53 242.910 38 174.314 0.493 1.723 E+2 2.472E+2;1.374E+2 0-117 Jun. 7-10 159.5 1.0-3.0 69 10.842 5 356.302 4 284.874 0.370 9.368 E+o l.673E+l;6.532E+o 0-117 Jun. 21-24 173.5 1.0-3.0 70 201.583 99 412.169 76 314.533 0.426 1.335 E+2 2.836E+2;9.228E+l 0-117 Jun. 28- ~

I Jul. 3 181.5 1.0-3.0 70 100.448 32 265.146 24 196.316 0.460 8.683 E+l l.335E+2;6.742E+l 0-117 I-'

Jul. 12-15 194.5 1.0-3.0 70 121. 519 52 359.797 38 261.600 0.479 9.951 E+l l.747E+2;7.763E+l 0-117 l.O Jul. 19-23 202 1.0-3.0 70 65.967 33 414 .676 23 296.060 0.498 3.928 E+l 8.550E+l;2.136E+l 0-117 Jul. 26-29 208.S 1.0-3.0 70 7.766 3 272.663 2 194.428 0.499 5.958 E+o 9.531E+o;3.798E+o 0-117 Aug. 9-13 223 1.0-3.0 70 8.948 3 322.244 3 257.091 0.373 6.282 E+o l.173E+l;4.398E+o 0-117 Aug. 23-27 237 1.0-3.0 70 8.729 2 180.395 1 133.600 0.459 8.201 E+o l.096E+l;6.002E+o 0-117 Aug. 30-Sep. 2 243.5 1.0-3.0 70 4.640 2 276 .178 1 159.336 0.672 4.624 E+o 6.374E+o;3.286E+o 0-117 Sep. 20-24 265 l.0-3.0 69 1.002 0 233.528 0 173.681 0.455 8.591 E-1 l.274E+o;6.982E-l 0-117 Oct. 4-5 277 .5 1.0-3.0 70 0 0 0-117 Oct. 18-20 292 1.0-3.0 70 0 0 0-117 t Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

Table 4-11 Population statistics for bay anchovy postlarvae prior and subsequent to moving-average process:0.5-m plankton n~t collections, 1979.

Prior to Averaging t Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian

• Range of Density3 Error of of Error of of Density 3 Confidence River Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation R2 (x/lOOm 2 Limits Kilometers 1979 Mar. 27-30 87.5 3.1-20.0 11 0 ** 64-117 Apr. 17-20 108.5 3.1-20.0 40 0 0 64-117 May 1-4 ll2.5 3.1-20.0 39 0 0 64-117 May 22-24 143 3.1-20.0 51 79.9_97 19 168.977 12 103.248 0.634' 7.095 E+l 9.419E+l;5.190E+l 0-117 May 29-Jun. 1 150.5 3.1-20.0 51 50.174 13 l'F.957 9 128.452 0.489 6.277 E+l 8.090E+l;4.915E+l 0-117 Jun. 5-7 157 3.1-20.0 51 32.145 8 182. 382 6 142. 512 0.402 2.503 E+l 3.792E+l;l.841E+l 0-117

~

Jun. 12-14 164 3.1-20.0 72 86. 215 44 437. ma 29 283.624 0.586 4.146 E+l 9.851E+l;2.665E+l 0-117 I Jun. 25-29 178 3.1-20.0 77 90.049 28 274.235 16 159. 514 0.666 4.123 E+l 7.364E+l;3.062E+l 0-117 [\.)

Jul. 9-12 191.5 3.1-20.0 71 139. 216 38 230.912 31 186.972 0.354 1.006 E+2 l.618E+2;7.407E+l 0-117 0 Jul. 16-20 199 3.1-20.0 51 477 .802 138 205.729 76 113. 792 0.100 1.703 E+2 3.232E+2;1.269E+2 0-117 Jul. 24-27 206.5 3.1-20.0 47 308.636 87 192.801 53 117.347 0.638 2. 596 E+2 3.659E+2;1.710E+2 0-117 Aug. 6-9 219.5 3.1-20.0 49 380.859 80 146.901 67 123 .383 0.309 3 .. 379 E+2 4.729E+2;2.136E+2 0-117 Aug. 20-24 234 3.1-20.0 57 25.759 4 130.968 3 97.579 0.455 2.633 E+l 3.292E+l;2.028E+l 0-117 Sep. 10-13 254.5 3.1-20.0 70 2.952 l 203.703 l 164.322 0.359 2.244 E+o 3.392E+o;l.497E+o 0-117 Oct. 15-17 289 3.1-20.0 79 0.508 0 237.807 0 149.691 0.609 2.959 E-1 4.654E-1;2.350E-l 0-117 Oct. 29-Nov. 2 304 3.1-20.0 46 0.138 0 330.202 0 252.474 0.428 1. 766 E-1 2.802E-l;l.414E-l 0-117 t Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

• • Insufficient sample size to estimate density.

Table 4-12 Population statistics for bay anchovy postlarvae prior and subsequent to moving-average process:0.5-m plankton net collections, 1980.

t t Prior to Averaging Subsequent to Averaging Size Number Hean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian Range of Density Error of of Error of of. Density Confidence River 3 R2 3 Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation (x/lOOm ) Limits Kilometers 1980 Jan. 23 23 3.1-20.0 2 0 ** 64-117 Mar. 17-20 78.5 3.1-20.0 40 0 0 64-117 Apr. 15-17 107 3.1-20.0 40 0 0 64-117 Apr. 29-May 2 121. 5 3.1-20.0 40 0.066 0 441.659 0 374.808 0.298 3.994 E-1 4.790E-1;3~254E-l 64-117 May 5-7 127 3.1-20.0 42 0 0 0-117 May 19-22 141.5 3.1-20.0 69 60.692 20 271.625 16 214.355 0.386 6.276 E+l 9.377E+l;4.662E+l 0-117 Jun. 2-6 156 3.1-20.0 68 227.810 58 210. 775 38 137 .853 0.579 1.548 E+2 2.302E+2;1.075E+2 0-117 .i:::.

Jun. 9-12 162.5 3.1-20.0 70 91. 761 24 221.502 17 156.285 0.509 5.524 E+l 8.918E+l;4.162E+l 0-117 I N

Jun. 16-20 170 3.1-20.0 70 73.099 19 219 .161 14 162.207 0.460 4.003 E+l 6.809E+l;2.885E+l 0-117 I-'

Jul. 7-11 191 3,1-20.0 70 511.256 107 17 5. 822 68 110. 713 0.609 2.401 E+2 3.741E+2;1.697E+2 0-117 Jul. 14-18 198 3.1-20.0 70 760.286 123 135 .098 87 95.481 0.508 5.612 E+2 7.330E+2;4.272E+2 0-117 Jul. 21-24 204.5 3.1-20.0 69 868.354 241 230.381 161 154.345 0.558 1.114 E+3 l.434E+3;8.141E+2 0-117 Aug. 4-7 218.5 3.1-20.0 70 292.390 66 189 .350 45 129. 382 0.540 1.741 E+2 2.636E+2;1.155E+2 0-117 Aug. 18-23 233.5 3.1-20.0 68 16.497 5 225.151 3 171.039 0.432 6.726 E+o l.350E+l;4.003E+o 0-117 Sep. 8-12 254 3.1-20.0 69 4.009 1 205.820 1 166.350 0.356 1.916 E+o 3.506E+o;l.350E+o 0-117 Sep. 22-29 269.5 3.1-20.0 66 2.653 1 344.805 \ 1 163.193 o. 779 1.625 E+o 2.680E+o;l.159E+o 0-117 Oct. 6-10 282 3.1-20.0 70 0.435 0 295.555 0 237.737 0.362 3.290 E-1 5.740E-1;2.652E-l 0-117 Oct. 20-27 297.5 3.1-20.0 58 0.931 1 508.952 0 272.132 0.719 9. 763 E-1 l.636E+o;8.494E-l 0-117 Nov. 3-7 310 3.1-20.0 53 0.207 0 265.853 0 231.090 0.259 1.926 E-1 3.227E-1;1.432E-1 0-117 t

Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

• • Insufficient sample size to estimate density.

Table 4-13 Population statistics for bay anchovy postlarvae prior and subsequent to moving-average process:0.5-m plankton net collections, 1981.

• t Prior to Averagingt Subsequent to Averaging 1c Size Number Mean Standard Coefficient Standard Coefficient Mean +9S%

Collection Julian Range of Density Error of of Error of of Density Confidence River 3 R2 3 Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation (x/lOOm ) Limits Kilometers 1981 Apr. 27-30 118 .s 3.1-20.0 69 0 0 0-117 May 11-14 132 .s 3.1-20.0 70 0 0 0-117 May 18-22 140 3.1-20.0 68 0.413 0 614.147 0 486.799 0.381 1.300 E-1 6.12SE-l;l.1S2E-l 0-117 May 26-28 147 3.1-20.0 66 0.039 0 476.928 0 379.6S2 0.376 3.381 E-2 6.98SE-2;2.995E-2 0-117 Jun. 8-11 160.S 3.1-20.0 70 7.S8S 2 242.817 2 179 .831 0.4S9 4.267 E+o 7.49SE+o;3.283E+o 0-117 Jun. lS-18 167 .s 3.1-20.0 68 68.466 22 269.98S 14 163.206 0.640 4.326 E+l 7.009E+l;3.600E+l 0-117 Jun. 22-26 17S 3.1-20.0 66 397.757 108 221.304 69 140. 94J 0.601 2.S04 E+2 3.870E+2;1.883E+2 0-117 Jul. 6-10 3.1-20.0 124.206 30 206.848 22 146.64S a.sos 9.192 E+l l.347E+2;7.319E+l 0-117 ~

189 71 I Jul. 13-17 196 3.1-20.0 70 480.82S 94 163.645 63 109.S02 0.559 3.334 E+2 4.580E+2;2.273E+2 0-117 N Jul. 20-24 203 3.1-20.0 70 482.448 78 136.031 45 78.105 0.675 4.141 E+2 5.033E+2;3.2S8E+2 0-117 N Aug. 3-6 216.S 3.1-20.0 71 235.885 32 114 .568 23 82.270 0.492 2.481 E+2 2.937E+2;2.032E+2 0-117 Aug. 17-22 231.S 3.1-20.0 69 144.450 35 200.836 25 145.588 0.482 1.279 E+2 l.780E+2;8.S65E+l 0-117 Aug. 31-Sep. 3 244.5 3.1-20.0 70 lS.048 3 186.9S4 2 128.974 O.S31 1.181 E+l l.641E+1;7.74SE+o 0-117 Sep. 14-18 2S9 3.1-20.0 70 6.503 2 293.386 1 - 149 .561 0.744 3.274 E+o S.576E-+-0;2.085E+o 0-117 Sep. 28-30 272 3.1-20.0 70 1.756 0 214.240 0 132 .863 0.621 1.044 E+o l.S96E+o;7.384E-l 0-117 Oct. 12-lS 286.S 3.1-20.0 70 1.449 0 201.487 0 162 .S72 0.3S8 9.403 E-1 l.498E+o;S.960E-l 0-117 t

Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

Table 4-14 Population statistics for bay anchovy postlarvae prior and subsequent to moving-average pro'cess:0.5-m plankton net collections, 1982.

Prior to Averaging t Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian* Range of Density 3

Error of of Error of of Density 3

Confidence River Period Date (mm) Samples (x/100111 ) Mean Variation Mean Variation R2 (x/lOOm ) Limits Kilometers 1982 Apr. 26-30 118 3.1-20.0 69 0 0 0-117 May 11-14 132.5 3.1-20.0 70 0 0 0-117 May 17-21 139 3.1-20.0 70 9.736 5 387.027 3 294.601 0.429 9.448 E+o l.624E+l;6.962E+o 0-117 May 24-27 145.5 3.1-20.0 70 201.485 59 243.563 39 163 .206 0.558 1.882 E+2 2.660E+2;1.467E+2 0-117 Jun. 7-10 159.5 3.1-20.0 69 69.851 21 251.277 14 165.962 0.570 5.809 E+l 8.573E+l;4.657E+l 0-117 Jun. 21-24 173.5 3.1-20.0 70 200.292 61 254.536 45 186.909 0.469 1.357 E+2 2.243E+2;9.340E+l 0-117 Jun. 28- ~

Jul. 3 181.5 3.1-20.0 70 345.410 84 202.947 44 107.213 0.725 2. 733 E+2 3.609E+2;2.262E+2 0-117 I N

Jul. 12-15 194.5 3.1-20.0 -70 222.258 70 262.384 43 161.793 0.625 1.702 E+2 2.553E+2;1.379E+2 0-117 w Jul. 19-23 202 3.1-20.0 70 166.075 48 239.823 26 128.696 0.716 1.137 E+2 l.643E+2;7.976E+l 0-117 Jul. 26-29 208.5 3.1-20.0 70 76.208 17 191.122 13 138.903 0.479 5.323 E+l 7.828E+l;3.780E+l 0-117 Aug. 9-13 223 3.1-20.0 70 27.269 6 174.977 3 105.840 0.639 1.968 E+l 2.651E+l;l.457E+l 0-117 Aug. 23-27 237 3.1-20.0 70 24.806 5 160.355 3 100.077 0.616 2.204 E+l 2.792E+l;l.692E+l 0-117 Aug. 30-Sep. 2 243.5 3.1-20.0 70 37.712 7 163.151 4 . 96.248 0.657 2.218 E+l 3.077E+l;l.480E+l 0-117 Sep. 20-24 265 3.1-20.0 69 24.142 7 .227.751 5 163.931 0.490 2.241 E+l 3.184E+l;l.557E+l 0-117 Oct. 4-5 277 .5 3.1-20.0 .JO 3.643 1 189.369 1 135.477 0.496 2.263 E+o 3.431E+D;l.664E+o 0-117 Oct. 18-20 292 3.1-20.0 .70 2.149 1 196.230 0 133 .101 0.547 1.482 E+o 2.159E+D;l.037Ei-O 0-117 t

Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

Table 4-15 Population statistics for bay anchovy O+ prior and subsequent to moving-average process:4.9-m surface trawl collections, 1979.

t t Prior to Averaging Subsequent to Averaging Number Mean Standard Coefficient Standard Coefficient Mean +95%

Size River Density Confidence Collection Julian* Range of Density 3

Error of of Error of of R2 3 Limits Kilometers (mm) Samples (x/lOOm ) Mean Variation Mean Variation (x/lOOm )

Period Date 1979 6.359 E-3 l.021E-2;5.871E-3 0-117 Apr. 10-12 101 0-68 95 0.00335 0.00238 691 0.00194 565 0.33770 2.05275 0.38905 175 0.25739 116 0.56751 1.811 E+o 2.320E+o;l.439E+o 0-117 Apr. 24-25 114.5 0-68 85 ~

0 0 0-117 I May 8-10 U9 0-20 105 0 0 0-117 [\.)

May 22-24 143 0-20 67 0-117 ~

157 0-30 107 0 0 Jun. 5-7 3.414 E-4 2.643E-3;3.261E-4 0-117 171 0-30 100 0.00155 0.00155 1,000 0.00116 752 0.43996 Jun. 18-22 E-1 4.098E-1;2.168E-l 0-117 184.5 0-45 67 0.39423 0.09812 204 0.07436 154 0.43432 2.626 Jul. 2-5 7.449 E-1 l.071E+o;6.253E-l 0-117 199 0-45 98 0.94153 0.23976 252 0.16459 173 0.53361 Jul. 16-20 Jul. 31- 6.465 E+o l.117E+l;4.463E+o 0-117 Aug. 3 213~5 0-48 109 6.24959 2.80039 468 2.38834 399 0.27937 9.32954 2.74307 226 1.93755 160 0.50968 6.962 E+o l.080E+l;5.059E+o 0-117 Aug. 13-17 227 0-48 59 3.11788 0.47357 155 0.32955 108 0.52045 2.839 E+o 3.488E+-0;2.348E+o 0-117 Aug. 27-30 240.5 0-48 104 t Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period

• Table 4-16 Population statistics for bay anchovy O+ prior and subsequent to moving-average process:4.9-m bottom trawl collections, 1979.

Prior to Averagingt Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian

• Range of Density 3 Error of of Error of of Density 3 Confidence River Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation R2 (x/lOOm ) Limits Kilometers 1979 May 15-18 136.5 0-20 84 0 0 0-117 May 29-Jun. 1 150.5 0-25 105 0 0 0-117 .i::.

Jun. 12-14 164 0-30 104 0 0 0-117 I Jun. 25-29 178 0-30 103 0 0 0-117 N Ul Jul. 9-13 192 0-45 106 0.00618 0.00407 677 0.00337 561 0.32030 2.378 E-3 9.017E-3;1.911E-3 0-117 Jul. 24-27 206.5 0-45 95 0.25083 0.14038 545 0.11319 440 0.35669 3.002 E-1 5.243E-1;2.645E-l 0-117 Aug. 6-10 220 0-48 100 5.24402 1.52004 290 0.84086 160 0.69709 9.543 E+-0 l.121E+l;8.725E-t-O 0-117 Aug. 20-24 234 0-48 86 3.82865 0.82939 201 0.41759 101 0.74947 4.715 E+o 5.542E+o;4.117E-t-0 0-1.17 Sep. 4-5 247.5 0-54 35 6.25793 1.41763 134 0.80865 76 0.68418 1.001 E+l l.166E+l;8.587E+o 0-117 Sep. 10-13 254.5 0-54 95 o.79229 *0.24386 300 0.17493 215 0.49090 9 .917 E-1 l.338E+o;8.125E-l 0-117 Sep. 25-27 269 0-54 41 0.92320 0.27924 194 0.18860 131 0.55525 1.110 E+-0 l.491E+-0;8.516E-l 0-117 Oct. 11 284 0-58 28 Q.23714 0.05875 131 0.04203 94 0.50719 2 .210 E-1 3.072E-l;l.468E-l 0-117 Oct. 22-23 295.5 0-58 55 0.22553 0.04870 160 0.02639 87 0.71182 2.238 E-1 2.760E-l;l.821E-l 0-117 Nov. 15 319 0-62 29 0.69634 0.25271 195 0.22551 174 0 .23213 7.229 E-1 l.185E+o;4.244E-l 0-117 Nov. 19-21 324 0-62 43 0.94751 0.28875 200 0.17281 120 0.65035 7.636 E-1 l.112E+o;5.437E-l 0-117 Nov. 27 331 0-62 24 0.65881 0.25548 190 0.16759 125 0.58837 7.028 E-1 l.050E+o;4.801E-l 0-117 Dec. 4-7 339.5 0-62 53 0.33385 0.12760 278 0.10863 237 0.28913 3.326 E-1 5.477E-1;2.328E-l 0-117 t Averaging indicates moving average process (three nearest.neighbors).

• Midpoint of collection period.

Table 4-17 Population statistics for bay anchovy 0+ prior and subsequent to moving-average process:4~9-m hottom trawl collections, 1980.

Prior to Averaging t Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean +9S%

Collection Julian

• Range of Density3 Error of of Error of of Density) Confidence River Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation R2 (x/lOOm ) Limits Kilometers 1980 Jan. 16-18 17 0-6S 31 1.21282 0.67999 312 0.40627 187 0.6S49J 3.178 E-t-0 4.008E-t-0;2.731E-t-O 0-117 Jan. 21-23 22 0-6S 8 0 ** 0-117 Jan. 28-29 28.S 0-6S 23 o. 3S777 0.26182 3Sl 0.206S8 277 0 ..40S72 3.77S E-1 8.060E-1;2.17SE-l ~117 Mar. 10 70 0-68 s 0 ** 64-117 Har. 20 80 0-68 10 0.02779 ** 64-117 Mar. 24-27 8S.5 0-68 26 0.1947S O.OS774 lSl 0.04149 109 O.S0419 2.272 E-1 3.127E-l;l.46SE-l 64-117 Apr. 7-11 100 0-68 SS 0.02164 0.00704 241 0.00428 147 0.63668 1.854 E-2 2.702E-2;1.62SE-2 0-117 Apr. 21-23 113 0-68 107 0.63175 0.16247 266 0.10118 166 0.615&4 4.852 E-1 6.845E-1;3.789E-l 0-117 May S-7 127 0-20 107 0 0 ~117 May 12-lS 134.5 0-20 107 0 0 0-117 .i::.

May 19-22 141.5 0-20 70 0 0 I 0-117 N Jun. 2-6 156 0-30 68 0 0 0-117 (}"\

Jun. 9-12 162.S 0-30 70 0 0 0-117 Jun. 16-20 170 0-30 70 0 0 0-117 Jul. 7-11 191 0-45 70 0.01814 0.01279 S90 0.0106S 491 0.31596 6.453 E-3 2.7SSE-2;4.099E~3 o-'i11 Jul. 14-18 198 0-4S 70 0.08S36 0.04346 426 0.031S8 310 0.479SO 9.508 E-2 l.576E-1;8.316E-2 0-117 Jul. 21-2S 205 0-4S 70 l.OS698 O.S4539 432 0.3793S 300 0.52322 9.142 E-1 l.665E-t-0;7.155E-l 0-117 Aug. 4-7 218.S 0-48 70 3.30363 1.46867 372 1.099Sl 278 0.44766 3.414 E-t-0 5.S91E-t-0;2.6SOE-t-O 0-117 Aug. 11-14 225.5 0-48 70 1.91522 o. 73385 321 0.56139 24S 0.42326 1.417 E-t-0 2.528E-t-0;9.794E-l ~117 Aug. 18-23 233.5 0-48 68 2.57824 0.63100 202 0.45372 145 0.49069 1.494 E-t-0 2.392E-t-0;1.042E-t-0 0-117 Sep. 2-5 247.S 0-S4 70 5.23079 1.23874 198 0.97760 156 0.38621 3.454 E-t-0 5.389E-t-0;2.293E-t-O 0-117 Sep. 8-12 254 0-54 70 7.31343 2.38863 273 1.89981 217 0.37658 6.246 E+o l.001E+l;4.539E-t-0 0-117 Sep. 22-26 268 0-54 47 1.72593 0.57359 228 0.4S760 182 0.37739 1. 729 E-t-0 2.6SlE-t-O;l.266E+o 0-117 Sep. 29 273 0-S4 20 0.96909 0.513S7 237 0.38148 176 0.47730 8.7S4 E-1 l.674E-t-O;S.70SE-l ~117 Oct, 6-9 281.S 0-58 70 1.19685 0.24950 174 0.16608 116 O.S6332 1.122 E+o l.4SlE+o;8.667E-l 0-117 Oct. 20-23 295.S 0-58 so 1.03718 0.26249 179 0.19665 134 0.45017 8.802 E-1 l.275E-t-0;5.783E-l 0-117 Oct. 27 301 0-58 9 0.20420 ** 0-117 Nov. 3-7 310 0-62 SS 0.83942 0.19198 170 0.14307 126 0.45486 5.675 E-1 8.508E-1;3.751E-l 0-117 t

Averaging indicates moving average process (three nearest neighbros).

• Midpoint of collection period.

• • Insufficient sample size to estimate density.

Table 4-18 Population statistics for bay anchovy O+ prior and subsequent to moving-average process:pelagic fixed-frame net collections, 1981.

Prior to Averaging t Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian

• Range of Density 3

Error of of Error of of Density 3

Confidence River Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation R2 (x/lOOm ) Limits Kilometers 1981

!iay 4-8 126 0-20 54 0 0 0-117 May 18-22 140 0-20 54 0 0 0-117 Jun. 1-5 154 0-30 47 0 0 0-117 0 0-117 ~

Jun. 15-19 168 0-30 49 0 I Jun. 22-26 175 0-30 47 0 0 0-117 N Jul. 6-10 189 0-45 47 0.48817 0.21738 305 0.16172 227 0.45859 2.336 E-1 5.591E-l;l.890E-l 0-117 -..J Jul. 13-17 196 0-45 47 5.98075 2.25550 259 1.15289 132 0.74441 1.332 E+o 3.653E+o;8.522E-1 0-117 Jul. 27-30 209.5 0-45 47 22.49359 5. 79764 177 2.97579 91 0.74228 7 .321 E+o 1.331E+l;S.335E+o 0-117 Aug. 3-6 216.5 0-48 47 21.22292 8.34919 270 5. 77140 186 0.53256 1.110 E+l 2.272E+l;7.582E+o 0-117 Aug. 17-22 231. 5 0-48 47 6.81526 1.48164 149 0.92075 93 0.62221 3.363 E+o 5.217Et0;2.609E+o 0-117 Aug. 24-27 237.5 0-48 47 15 .84928 3.95206 171 2. 77286 120 0.51842 9.785 E+o 1.537E+1;6.976E+o 0-117 Aug. 31-Sep. 3 244.5 0-54 45 14.07528 2.98795 142 1.97869 94 0.57142 5.632 E+o 9.619E+o;4.356Et0 0-117 Sep. 14-18 259 0-54 45 8.99987 2.22628 166 1.61106 120 0.48822 4.099 E+o 7.346E+o;3.244E+o 0-117 Sep. 21-25 266 0-54 45 12.22290 2.35726 129 1.33097 73 0.68844 7 .699 E+o 1.038E+l;6.439Et0 0-117 Oct. 5-9 280 0-58 49 4.94270 1.29705 184 0.90575 128 0.52251 2.982 E+D 4.803E+o;2.127E+o 0-117 Oct. 19-22 293.5 0-58 49 17.85672 5.72868 225 3.63159 142 0.60650 9.927 E+D l.723E+1;6.861E+D 0-117 t Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

Table 4-19 Population statistics for bay anchovy o+ prior and subsequent to moving-average process:4.9-m bottom trawl collections, 1981.

Prior to Averagingt Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean Collect: ion Julian* +95%

Range of Density Error of of Error of of Density Period Date 3 Confidence River (nm) Sameles (x/lOOm ) Mean Variation Mean Variation R2 (x/ lOOm 3 ) Limits Kilometers 1981 Hay 4-8 126 0-20 16 0 May 18-22 0 0-117 140 0-20 16 0 0 Jun. 1-5 154 0-30 23 0.00199 0-117 0.00199 480 0.00194 468 0.09091 2 .231 E-3 6.263E-3;1.642E-3 Jun. 15-19 168 0-30 23 0 0-117 Jun. 22-26 0 0-117 175 0-30 23 0 0 Jul. 6-10 189 0-45 23 0.00837 0-117 0.00578 331 0.00288 165 0.76290 7 .440 E-3 l.342E-2;6.439E-3 Jul. 13-17 196 0-45 23 0.01625 0.01492 0-117 440 0.01025 302 0.54995 9.610 E-3 3 .086E-2; 6. 918E-3 0-117 Jul. 27-30 209.5 0-45 39 0.41195 0.22709 344 0.15787 239 0.52947 3.981 E-1 7.176E-1;3.051E-l 0-117 J:::>

Aug. 3-6 216. 5 0-48 23 7.28395 6.28329 414 4.88582 322 0.42284 9.850 Ef-0 1.998E+l;7.458E+o 0-117 I Aug. 17-22 231.5 0-48 23 0.56059 0.30602 262 0.21639 N 185 0.52274 5.610 E-1 l.010Ef-0;3.964E-l 0-117 Aug. 24-27 237.5 0-48 39 0.43705 0.12887 18.4 0.05948 OJ 85 0.79261 4.542 E-1 5.746E-1;3.873E-1 0-.117 Aug. 31-Sep. 3 244.5 0-54 25 0.62003 0.31697 256 0.21488 173 Sep. 14-18 0.55956 9.889 E-1 1.432E+o;7.398E-1 0-117 259 0-54 25 0.31288 0.15180 243 0.13521 216 Sep. 21-25 . 266 0.23968 3.496 E-1 6.287E-l;l.818E-l 0-117 0-54 35 7.82435 4.90148 371 3.13461 237 0.60304 Oct. 5-9 280 1.092 E+l 1.729E+l;9.133E+O 0-117 0-58 28 1.83106 0.68194 197 0.64959 188 0.12623 Oct. 19-22 293.5 1.587 E+o 2.920E+o;7.841E-l 0-117 0-58 31 0.85414 0.25947 169 0.19071 124 0.47781 9.674 E-1 1.357E+o;6.633E-1 0-117 t

Averaging indlcates moving average process (three nearest neighbors).

• Midpoint of collection period.

Table 4-20 Population statistics for bay anchovy O+ prior and subsequent to moving-average process:pelagic fixed-frame net collections, 1982.

Prior to Averaging t Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian* Range of Density3 Error of of Error of of Density Confidence River Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation R2 (x/lOOm3 ) Limits Kilometers 1982 May 3-5 124 0-20 54 0 0 0-117 May 17-21 139 0-20 54 0 0 0-117 Jun. 7-10 159.5 0-30 47 0 0 0-117 Jun. 14-17 166.5 0-30 47 0 0 0-117 of:>.

Jun. 28- I N

Jul. 3 181.5 0'-45 47 0.49262 0.16950 236 0.10846 151 0.59944 3.099 E-1 5.282E-1;2.515E-l 0-117 l.O Jul. 12-15 194.5 0-45 47 4.10544 0.91645 153 0.64674 108 0.51280 1.847 E+o 3.148E+o;l.320E+o 0-117 Jul. 19-23 202 0-45 47 6.82418 2.10328 211 0.96509 97 0.79403 2.435 E+o 4.378E+o;2.029E+o 0-117 Jul. 26-30 209 0-45 47 10.42129 3.13212 206 1.20318 79 0.85564 3.393 E+o 5.815E+o;2.768E+o 0-117 Aug. 2-5 215.5 0-48 47 4.40565 1.61029 251 1.36655 213 0.29547 2 .659 E+D 5.410E+o;l.894E+o 0-117 Aug. 16-19 229.5 0-48 47 14.52573 3.68982 174 2.26638 107 0.63093 7.498 E+o 1.206E+1;5.730E+o 0-117 Aug. 23-27 237 0-48 47 11.69966 2.55477 150 1.48036 87 0.67154 6.223 E+o 9.203E+o;4.859E+o 0-117 Aug. 30-Sep. 2 244.5 0-54 45 24.96102 14.53186 391 11.17846 300 0.42172 3.335 E+l 5.587E+l;2.587E+l 0-117 Sep. 13-16 257 .5 0-54 41 11.34348 3.03689 171 1.66120 94 0.70827 5.389 E+D 8.746E+o;4.425E+o 0-117 Sep. 27-Oct. 1 272 0-54 45 9.77946 3.96410 272 2.96649 203 1.45272 9.232 E+o 1.521E+1;6.396E+o 0-117 Oct. 12-14 286 0-58 49 12.06805 2.47474 144 1.76463 102 0.50214 7 .477 E+o l.103E+l;5.458E+o 0-117 Oct. 27-29 301 0-58 49 2.27560 0. 61751 190 0.33605 103 0.71002 1.320 E+o l.996E+D;l.082E+o 0-117 t Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

Table 4-21 Population statistics for bay anchovy O+ prior and subsequent to moving-average process:4.9-m bottom trawl collections, 1982.

t t Prior to Averaging Subsequent to Averaging Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian

• Range of Density Error of of Error of of Density Confidence River 3 R2 3 Period Date (mm) Samples (x/lOOm 2 Mean Variation Mean Variation (x/lOOm } Limits Kilometers 1982 May 3-5 124 0-20 17 0 0 0-117 May 17-21 139 0-20 16 0 0 0-117 Jun. 7-10 159 .5 0-30 23 0 0 0-1],7 Jun. 14-17 166.5 0-30 23 0 0 0-117 Jun. 28-Jul. 3 181.5 0-45 23 0 0 0-117 Jul. 12-15 194.5 0-45 23 0.03087 0.03087 480 0.02106 327 0.55556 1.411 E-2 5.780E-2;1.151E-2 0-117 Jul. 19-23 20:? 0-45 23 0.00173 0.00173 480 0.00134 372 0.42424 3.339 E-4 3.114E-3;2.638E-4 0-117 *"I Jul. 26-30 209 0-45 23 0.23125 0.12409 257 0.11547 239 0.17346 2.229 E-1 4.623E-l;l.306E-l 0-117 w 215. 5 6.94974 5.50543 380 4.17604 288 0.45078 6 .271 E-+-0 0 Aug. 2-5 0-48 23 l.493E+l;4.541E-+-0 0-117 Aug. 16-19 229.5 0-48 33 0.60609 0.35337 335 0.23617 224 0 .56727 6.366 E-1 l.118E-+-0;4.158E-l 0-117 Aug. 23-27 237 0-48 23 0.52330 0.24308 223 0.23941 219 0.07410 7.092 E-1 l.206E-+-0;3.879E-l 0-117 Aug. 30-Sep. 2 244.5 0-54 25 1.53448 0.60252 196 0.41346 135 0.54873 1.744 E-+-0 2.597Ei-0;1.196E-+-0 0-117 Sep. 13-16 257.5 0-54 23 0.21461 0.07288 163 0.03894 87 o. 72750 2.562 E-1 3.370E-l;l.961E-l 0-117 Sep. 27-Oct. 1 272 0-54 25 0.66806 0.34070 255 0.22326 167 0.58846 9.664 E-1 l.427E+o;7.300E-l 0-117 Oct. 12-14 286 0-58 21 0.09077 0.03677 186 0.03045 154 0.34849 9.296 E-2 1.565E-1;6.226E-2 0-117 Oct. 27-29 301 0-58 21 0.60230 0.20774 158 0.20330 155 0.09018 5.156 E-1 9.397E-l;l.705E-l 0-117 t

Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

Table 4-22 Population statistics for bay anchovy l+ and older prior and subsequent to moving-average process:4.9-m surface trawl collections, 1979.

Prior to Averagingt t Subsequent to Averaging Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian

• Range of Density Error of of Error of of Density Confidence River 3 R2 3 Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation (x/100111 ) Limits Kilometers 1979 Apr. 10-12 101 69-120 95 0.01175 0.00852 707 0.00674 559 0.38115 2.323 E-2 3.657E-2;2.169E-2 0-117 Apr. 24-25 114.5 69-120 85 2. 58954 0.56978 203 0.35400 126 0.61860 2.438 EtO 3.139E+o;l.970E+o 0-117 May 8-10 U9 21-120 105 5.02657 1.08268 221 0.82478 168 0.42525 4.825 EtO 6.450E+o;4.047E+o 0-117 May 22-24 143 21-120 67 7.39269 2.19391 243 1.7747':. 197 0.35551 8.923 EtO l.244E+l;6.876E+o 0-117 ~

Jun. 5-7 157 31-120 107 2.13671 0.53058 257 0.29227 141 0.69943 2.318 E+o 2.894E+o;l.942E+o 0-117 I Jun. 18-22 171 31-120 100 4.52661 1.47339 325 1.12144 248 0.42654 7.239 E+o 9.460Et0;5.972E+o 0-117 w I-'

Jul. 2-5 184.5 46-120 67 2.74862 0.64466 192 0.44399 132 0.53284 2.118 EtO 2.997E+o;l.698E+o 0-117 Jul. 16-20 199 46-120 98 1. 71134 0.42092 243 0.35011 203 0.31531 1.286 E+o l.979E+o;9.820E-l 0-117 Jul. 31-Aug. 3 213.5 49-120 109 1.11119 0.34958 328 0.21466 202 0.62643 7.786 E-1 l.202E+o;5.949E-l 0-117 Aug. 13-17 227 49-120 59 1.26215 0.45512 277 0.36095 220 0. 38184 9.692 E-1 l.684E+o;6.679E-l 0-117 Aug. 27-30 240.5 49-120 104 0.29962 0.07377 251 0.05709 194 0.40678 2.208 E-1 3.333E-l;l.589E-l 0-117 t

Averaging indicates moving average process ( three nearest neighbors).

• Midpoint of collection period.

Table 4-23 Population statistics for bay anchovy l+ and older prior and subsequent to moving-average process:4.9-m bottom trawl collections, 1979.

Prior to Averaging t Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean +9S%

Collection Julian* Range of Density3 Error of of Error l)f of Density Period 3 Confidence River Date (mm) Samples (x/lOOm 2 Mean Variation Mean Variation R2 (x/lOOm ) Limits Kilometers 1979 May lS-18 136.5 21-120 84 3.00749 0.738Sl 22S 0.47281 144. O.S9S04. 3.086 E+o May 29- 4.023Et-0;2.488Et-0 0-117 Jun. 1 lSO. 5 26-120 105 S.59498 1.28642 236 1.286'42 236 0.39279 6.617 E+o Jun. 12-14 8.601E+o;S.082E+o 0-117 164 31-120 104 3 .31169 o. 74616 230 0.367S9 113 0.7S966 4.00S E+o Jun. 2S-29 4.729E+o;3.427Et-O 0-117 J::>.

178 31-120 103 1.93718 0.35897 188 0.2S700 13S 0.4924S 2.274 E+-0 Jul. 9-13 2.780E+o;l.8S6E+o 0-117 I 192 46-120 106 2.20257 0.49798 233 0.26999 126 0.70885 2.652 E+o w Jul. 24-27 3.183E+o;2.253E+o 0-117 206.S46-120 95 3.42465 0.96971 276 0.67103 191 0.5262S 3.306 E+o N Aug. 6-10 4.63SEt-0;2.4SlE+o 0-117 220 49-120 100 4.25982 0.91709 21S O.S5567 130 0.636S8 S.6S9 E+o Aug. 20-24 6.7S9E+o;4.80SE+o 0-117 234 49-120 86 2.00194 O.S6311 261 0.36074 167 O.S9445 2.167 E+o Sep. 4-5 247.S 2.881E+o;l.637Et-0 0-117 SS-120 35 1.36745 0.29604 128 o.24s22 106 0.33407 1.114 E+o l.612Et-0;7.232E-l Sep. 10-13 254.S SS-120 0-117 9S 0.31320 0.08111 252 O.OSS97 174 0.52901 3.106 E-1 4.214E-1;2.S01E-l Sep. 25-27 269 55-120 0-117 41 0.9203S 0.27698 193 0.16564 llS 0.6Sl31 1.040 E+o l.375E+o;8.432E-l Oct. 11 284 59-120 28 0-117 0.27641 0.090Sl 173 0.07037 135 0.41792 2.S88 E-1 4.032E-l;l.439E-l 0-117 Oct. 22-23 295.5 S9-120 SS 0.21937 0.04806 162 0.02673 90 0.69641 2.136 E-1 2.66SE-l;l.228E-l 0-117 Nov. 15 319 63-120 29 0.64S62 0.2S491 213 0.22012 184 0.28097 6.848 E-1 l.136E+o;4.368E-l 0-117 Nov. 19-21 324 63-120 43 0.83475 0.291S7 229 0.19022 149 O.S8449 6. 508 E-1 l.03SEt-0;4.73SE-l 0-117 Nov. 27 331 63-120 24 0.59211 0.25936 21S 0.18282 151 0.52473 6.609 E-1 l.039E+o;4.326E-l 0-117 Dec. 4-7 339.S63-120 53 0.31S40 0.12779 295 0.10712 247 0.31091 3 .189 E-1 S.310E-1;2.294E-l 0-117 t

Averaging indicates moving average process (three nearest.neighbors).

• Midpoint of collection period

• Table 4-24 Population statistics for bay anchovy l+ and older prior and subsequent to moving-average process:4.9-m bottom trawl collections, 1980.

Prior to Averaging t Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian

• Range of Density Error of of Error of of Density Co"ii°fidence River 3

Period Date (mm) Samples (x/lOOm3 ) Mean Variation Mean Variation R2 (x/ lOOm ) Limits Kilometers 1980 Jan. 16-18 17 66-120 31 1.14690 0.68289 332 0.40600 197 0.65831 3 .116 E-t-0 3.945E-t-0;2.726E-t-O 0-117 Jan. 21-23 22 66-120 8 0 ** 0-117 Jan. 28-29 28.5 66-120 23 0.27143 0.26440 467 0.20247 358 0.44025 2. 766 E-1 6.966E-1;2.173E-l 0-117 Mar. 10 70 69-120 5 0 ** 64-117 Mar. 20 BO 69-120 10 0 ** 64-117 Mar. 24-27 85.5 69-120 26 0.01449 0.01449 510 0.01408 496 0.09333 1.037 E-3 3.005E-2;7.978E-4 64-117 Apr. 7-11 100 69-120 55 0.00623 0.00321 382 0.00264 314 0.33758 1.394 E-2 l .917E-2 ;l .160E-2 0-117 Apr. 21-23 113 69-120 107 0.27204 0.06705 255 0.04310 164 0.59074 2.539 E-1 3.388E-1;2.056E-l 0-117 May 5-7 127 21-120 107 0.72497 0.14033 200 0.10416 149 0.45423 6.705 E-1 8.757E-1;5.299E-l 0-117 .j::.

May 12-15 134.5 21-120 107 0.87033 0.17495 208 0.12765 152 0.47266 8.690 E-1 l.120E-t-0;6.982E-l 0-117 I May 19-22 141.5 21-120 70 4.83178 1.46332 253 0.98928 171 0.54957 4.599 E-1-0 6.55BE-t-0;3.678E-+-O 0-117 w Jun. 2-6 156 31-120 68 2.03057 0.64514 262 0.46079 187 0.49745 2. 362 E-t-0 3.275E-l-O;l.681E-t-O 0-117 w Jun. 9-12 162.5 31-120 70 2.88358 0.62492 181 0.50886 148 0.34656 2.759 E-t-0 3.766E-t-0;1.971E-t-O 0-117 Jun. 16-20 170 31-120 70 2.67914 0.67386 210 0.40579 127 0.64263 2.607 E-1-0 3.410E-l-0;2.056E-t-O 0-117 Jul. 7-11 191 46-120 70 3.32237 1.34788 .339 L07201 270 0.37662 2.916 E-1-0 5.039E-l-O;l.766E-t-O 0-117 Jul. 14-18 198 46-120 70 4.37554 1.18850 227 0.65916 126 0.69686 3.813 E-1-0 5.118E-l-0;3.118E-t-O 0-117 Jul. 21-25 205 46-120 70 3.40842 0.76239 187 0.65594 161 0.27047 2.538 E-1-0 3.837E-+-O;l.803E-t-O 0-117 Aug. 4-7 218.5 49-120 70 3.58047 1.32877 310 0.99115 232 0.45167 3.635 E-1-0 5.597E-l-0;2.786E-t-O 0-117 Aug. 11-14 225.5 49-120 70 1.55288 0.46866 253 0.25240 136 o. 71417 1.614 E-1-0 2.114E-l-O;l.370E-t-O 0-117 Aug. 18-23 233.5 49-120 68 1.07531 0.26259 201 0.16289 125 0.62092 7 .163 E-1 l.039E-l-0;5.538E-l 0-117 Sep. 2-5 247.5 55-120 70 1.08614 0.27033 208 0.20366 157 0.44068 7.493 E-1 l.15JE-l-0;5.343E-l 0-117 Sep. 8-12 254 55-120 70 1.15207 0.46721 339 0.35453 257 0.43253 7 .090 E-1 l.411E-l-0;4.097E-l 0-117 Sep. 22-26 268 55-120 47 0.45205 0.15270 232 0.12388 188 0.35614 2.851 E-1 5.345E-l;l.838E-1 0-117 Sep. 29 273 55-120 20 0.48574 0.27809 256 0.15690 144 0.69842 4.089 E-1 7.373E-1;3.251E-l 0-117 Oct. 6-9 281.5 59-120 70 0.30496 0.11196 307 0.07504 206 0.55738 1.568 E-1 3.054E-1;8.534E-2 0-117 Oct. 20-23 295.5 59-120 50 0.21855 0.06754 219 0.05435 176 0.36573 1. 760 E-1 2.852E-l;l.138E-l 0-117 Oct. 27 Nov. 3-7 301 310 59-120 63-120 9

55 0.03929 0.30948 0.09938 238 0.07703 185 0.41034 1.992 E-1 0-117 3.517E-l;l.192E-l 0-117 t Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

• • Insufficient sample size to estimate density.

Table 4-25 Population statistics for bay anchovy l+ and olrler prior and subsequent to moving-average process:pelagic fixed-frame net collections, 1981.

Prior to Averaging t Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian

• Range of Density Error of of Error of of Density Confidence River 3 R2 3 Period Date (mm) Samples (x/100111 ) Mean Variation Mean Variation (x/ lOOm ) Limits Kilometers 1981 "4.ay 4-8 126 21-120 .54 3.92436 1.18027 221 0.75435 141 0.59922 2.471 E+o 3.965E+o;l.933E+o 0-117 Hay 18-22 140 21-120 54 3.02290 1.10685 269 o. 70520 171 0.60173 2.346 E+o 3.743E+o;1.920E+o 0-117 Jun. 1-5 154 31-120 47 7.90324 2.45462 213 1.89123 164 0.41927 4.612 E+o 8.419E+o;3.478E+o 0-117 Jun. 15-19 168 31-120 49 6.25740 2.03258 227 1.53856 172 0.43897 3.489 E+o 6. 583e:+o; 2. 650E+o 0-117 ~

Jun. 22-26 175 31-120 47 7.88225 1.86080 162 1.08734 95 0.66597 4.956 E+o 7.144E+o;3.784E+o 0-117 I Jul. 6-10 189 46-120 47 5.62333 1.46481 179 0.86221 105 0.66106 2.483 E+o 4.219E+o;l.909E+o 0-117 UJ

~

Jul. 13-17 196 46-120 47 4.43674 1.74527 270 1.15256 178 0.57336 1.602 E+o 3.922E+D;l.066E+o 0-117 Jul. 27-30 209.5 46-120 47 5.68707 1.13070 136 0.86689 105 0.42497 2.520 E+o 4.265E+o;l.945E+o 0-117 Aug. 3-6 216.5 49-120 47 3.74906 1.49175 273 1.08238 198 0.48498 1.957 E+o 4.136E+o;l.333E+o 0-117 Aug. 17-22 231.5 49-120 47 1.99565 0.49467 170 0.49467 122 0.49562 1.064 E+o l.779E+o;8.319E-l 0-117 Aug. 24-27 237.5 49-120 47 3.46528 1.06254 210 0.80689 160 0.43586 2.633 E+o 4.258E+o;l.947E+o 0-117 Aug. 31-Sep. 3 244.5 55-120 45 1.85443 0.55051 199 0.38750 140 0.51579 6.962 E-1 l.477E+o;5.353E-l 0-117 Sep. 14-18 259 55-120 45 1. 72213 0.58200 227 0.45827 179 0.39409 5.859 E-1 l.509E+o;3.885E-l 0-117 Sep. 21-25 266 55-120 45 1.78814 0.51721 194 0.38094 143 0.46986 7.709 E-1 l.539E+o;4.807E-l 0-117 Oct. 5-9 280 59-120 49 o. 71066 0.32219 317 0.29878 294 0.15796 3.295 E-1 9.303E-l;l.993E-l 0-117 Oct. 19-22 293.5 59-120 49 1.13228 O.:'nl37 238 0.28767 17ii 0.45156 5.756 E-1 l.154E+o;4.044E-l 0-117 t Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period.

Table 4-26 Population statistics for bay anchovy l+ and older prior and subsequent to moving-average process:4.9-m bottpm trawl collections, 1981.

Prior to Averagingt Subsequent to Averaging t Size Number Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian

• Range of Density3 Error of of Error of of Density3 Confidence River Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation R2 (x/lOOm ) Limits Kilometers 1981 May 4-8 126 21-120 16 0.34526 0.14985 174 0.06523 76 0.82318 1.697 E-1 3.087E-l;l.198E-l 0-117 May 18-22 140 21-120 16 0.95241 0.33086 139 0.29303* 123 0.26787 8.381 E-1 l.463E+o;3.166E-l 0-117 Jun. 1-5 154 31-120 23 1.19114 o.47629 192 0.36192 146 0.44884 1.205 E+o l.956E+o;5.890E-l 0-117 Jun. 15-19 168 31-120 23 3.01514 1.28401 204 1.17998 188 0.19386 2.918 E+o 5.365E+o;l.406E+o 0-117 ~

Jun. 22-26 175 31-120 23 1.50744 0.83240 265 0.77405 246 0.17458 1.643 E+o 3.249E+o;8.732E-l 0-117 I Jul. 6-10 189 46-120 23 1. 72796 0.58667 163 0.48874 136 0.33754 1. 769 E+o 2.782E+o;9.021E-l 0-117 w Ul Jul. 13-17 196 46-120 23 1.53747 0.51980 162 0.40759 127 0.41310 1.421 E+o 2.266E+o;8.078E-l 0-117 Jul. 27-30 209.5 46-120 39 3.80315 1.60265 263 1.43155 235 0.22312 4.307 E+o 7.204E+o;2.421E+o 0-117 Aug. 3-6 216. 5 49-120 23 1.23741 0.64987 252 0.51715 200 0.39554 1.374 E+o 2.447E+o;8.480E-1 0-117 Aug. 17-22 231.5 49-120 23 1 *.41968 o. 72~22 244 0.63532 215 0.26339 1.689 E+o 3.006E+o;9.024E-l 0-117 Aug. 24-27 237.5 49-120 39 0.56744 0.16486 181 0.11929 131 0.49018 6.959 E-1 9.374E-1;5.361E-l 0-117 Aug. 31-Sep. 3 244.5 55-120 25 0.39240 0.11488 146 0.08614 110 0 .46118 3. 772 E-1 5.550E-1;2.384E-l 0-117 Sep. 14-18 259 55-120 25 0.60364 0.28782 238 0.26603 220 0.18127 5.071 E-1 l.056E-1;2.173E-l 0-117 Sep. 21-25 266 55-120 35 0.52358 0.14972 169 0.10291 116 0. 54141 5.031 E-1 7.122E-1;3.784E-l 0-117 Oct. 5-9 280 59-120 28 1.39516 0.49155 186 0.41890 159 0.30064 1.090 E+o l.950E+o;5.239E-l 0-117 Oct. 19-22 293.5 59-120 31 0.95811 0.29452 171 0.24595 143 0.32590 9.161 E-1 l.418E+o;5.362E-l 0-117 t Averaging .lndicates moving average process (three nearest neighbors).

• Midpoint of collection period.

Table 4-27 Population statistics for bay anchovy l+ and older prior and subsequent to moving-average process:pelagic fixed-frame net collections, 1982.

Prior to Averaging t Subsequent to Averaging t Size N'umber Mean Standard Coefficient Standard Coefficient Mean +95%

Collection Julian* Range of Deasity 3

Error of of Error of of Density 3 Confidence River Period Date (mm) Samples (x/lOOm ) Mean Variation Mean Variation R2 (x/ lOOm ) Limits Kilometers 1982 May 3-5 124 21-120 54 9.34268 4.56873 359 3.32691 2Ci2 G.47974 3.773 E+o l.036E+l;2.238E+o 0-117 May 17-21 139 21-120 54 13.83079 3.87885 206 2.55161 13f> 0.57543 5.357 E+o l.041E+l;3.813E+o 0-117 Jun. 7-10 159.5 31-120 47 1.54435 0.58015 258 0.45942 204 0.38652 1.190 E+o 2.115E+o;8.740E-l 0-117 Jun. 14-17 166.5 31-120 47 7 .26160 1.68570 159 1.17815 111 0.52215 3.395 E+o 5.766E+o;2.357E+o 0-117 .(:>.

Jun. 28- I w

Jul. 3 181.5 46-120 47 7 .84079 2.03412 178 1.09839 96 o. 71476 3. 610 E+o 5.821E+o;2.636E+o 0-117 (j)

Jul. 12-15 194.5 46-120 47 3.26736 1,04229 219 0.85755 180 0.33779 1.828 E+o 3.555E+o;l.257E+o 0-117 Jul. 19-23 202 46-120 47 1.97741 0.50705 176 0.35722 124 0.51446 9.241 E-1 l.643E+o;6.580E-l 0-117 Jul. 26-30 209 46-120 47 1.61087 0.34876 148 0.15637 67 0.80333 6.982 E-1 l.013E+o;5.658E-l 0-117 Aug. 2-5 215.5 49-120 47 0.39609 0*.19004 329 0.16347 283 0.27617 2.416 E-1 5.707E-l;l.899E-l 0-117 Aug. 16-19 229.5 49-120 47 3.28757 1.62117 338 0.95286 199 0.66205 1.103 E+o 3.021E+o;7.488E-l 0-117 Aug. 23-27 237 49-120 47 1. 97134 0.57171 199 0.26488 92 0.79001 8.042 E-1 1.337E+o;6.334E-l 0-117 Aug. 30-Sep. 2 244.5 55-120 45 0.93812 0.34596 247 0.24762 177 0.49936 8.463 E-1 l.345E+o;6.248E-l 0-117 Sep. 13-16 257.5 55-120 41 3.36247 0.97842 186 0.32626 62 0.89159 9.896 E-1 l.649E+o;8.467E-1 0-117 Sep. 27-Oct. 1 272 55-120 45 1.39572 0.58448 281 0.48367 232 0.33076 1.391 E+o 2.365E+o;9.606E-l 0-117 Oct. 12-14 286 59-120 49 1.28887 0.46647 253 0.36948 201 0.38570 7.585 E-1 l.502E+o;5.582E-l 0-117 Oct. 27-29 301 59-120 49 0.22207 0.13077 412 0.09619 303 0.47016 2.048 E-1 3.982E-l;l.610E-l 0-117 t Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collection period

• Table 4-28 Population statistics for bay anchovy l+ and older prior and subsequent to moving-average process:4.9-m bottom trawl collections, 1982.

Prior to Averagingt t Subsequent to Averaging Size Number M.e:an Standard Coefficient Standard Coefficient Mean +95%

Collection Julian* Range of Density Error of of Error of of Density3 Confidence River Period Date (mm) Samples (x/lOOm3 ) Mean Variation Mean Variation R2 (x/lOOm ) Limits Kilometers 1982 Hay 3-5 124 21-120 17 2.02132 1.66636 340 1.58232 323 0.15468 2.352 E+o 5. 706E+o; 1. 365,E+o 0-117

!-lay 17-21 139 21-120 16 0.74241 o.40565 219 0.30186 163 0.48318 7.530 E-1 l.396E+o;3.524E-l 0-117 Jun. 7-10 159.5 31-120 23 2.52822 1.29538 246 1.10279 209 0.30819 3.186 E+o 5.473E+o;l.817E+o 0-117 Jun. 14-17 166.5 31-120 23 1.68604 0.73904 210 0.64481 183 0.27335 2.050 E+o 3.388E+o;l.152E-l-O 0-117 ~

I Jun. 28- w Jul. 3 181.5 46-120 23 1.43960 0.42191 141 0.26451 88 0.62481 1.689 E-l-0 2.238E+o;l.191E+o 0-117 ....J Jul. 12-15 194.5 46-120 23 3.05288 0.96150 151 0.62074 98 0.60216 2.998 E+o 4.285E+o;1.952E+o 0-117 Jul. 19-23 202 46-120 23 1.20295 0.35292 141 0.29185 116 0.34722 1.358 E+o 1.964E+o;8.697E-l 0-117 Jul. 26-30 209 46-120 23 1.17887 0.42292 172 0.34325 140 0.37121 1.311 E+o 2.023E+o;8.676E-l 0-117 Aug. 2-5 215.5 49-120 23 3.47694 1.34814 186 1.05649 146 0.41379 3.337 E+o 5.528E+o;l.796E+o 0-117 Aug. 16-19 229.5 49-120 33 1.84761 0.61418 191 0.42692 133 0.53193 1.901 E+o 2.771E+o;l.261E+o 0-117 Aug. 23-27 237 49-120 23 1. 70118 0.87909 248 0.84088 237 0.12663 2.210 E+o 3.594E+o;1.402E+o 0-117 Aug. 30-Sep. 2 244 .s 55-120 25 0.67830 0.20762 153 0.16097 119 0.42394 6.634 E-1 9.957E-1;4.023E-1 0-117 Sep. 13-16 257.5 55-120 23 0.51017 0.20505 193 0.15635 147 0.44499 3.905 E-1 7.147E-l;l.643E-l 0-117 Sep. 27-Oct. 1 272 55-120 25 0.56045 ;J.25442 227 0.21089 188 0.34150 7.927 E-1 l.228E+o;4.808E-1 0-117 Oct. 12-14 286 59-120 21 0.58839 0.2~618 200 0.24138 188 0.15664 6.034 E-1 l.107E+o;2.958E-l 0-117 Oct. 27-29 301 59-120 21 0.81260 0.27130 153 0.19055 107 0.53136 5.730 E-1 9.705E-1;3.840E-l 0-117 t Averaging indicates moving average process (three nearest neighbors).

• Midpoint of collecticn period.

4-38 Table 4-29 Estimated daily instantaneous mortality rates for bay anchovy taken by 0.5-m plankton net, daylight only, during 1973-1978 near Artificial Island.

Instantaneous Daily Mortality(Zd) Standard N (- slope) Error R2 1973 7 0.08622 0.00813 0.957 1974 9 0.09413 0.01214 0.896 1975 7 0.06618 0.00819 0.929 1976 4 0.09846 0.01376 0.962 1977 6 0.09119 0.01545 0.897 1978 6 0.07277 0.01121 0.913 Mean 0.08483 AN COVA Residual SS DF MS 197 ;3 1. 80218 5 0.360437 1974 11. 98910 7 1. 712720 1975 4.87166 5 0.974332 1976 1.45602 2 0.728008 1977 6.97962 4 1.744900 1978 3.44946 4 0.862365 Pooled 30.6674 27 1.13583 Common 38.1803 32 1.19314 Total 93.6390 37 2.53078 Test for equality of slopes; F 5127

= 1.36 NS Test for equality of elevations; F 5132

= 3.16, p~0.05

.II I

I I

Table 4-30 Survival and mortality rates, based on otolith studies, for bay anchovy collected near Artificial Island during 1983.

April May June July August Mean Annual Survival (S) 0.1242 0.3224 0.1489 0.2256 0.2188 Standard*Error o. 015 3 0.0180 0.0233 0.0243 0.0259 Sample Size 410 457 201 231 201 Daily Instantaneous 0.00571 0.00310 0.00522 0.00408 0.00416 0.00445 Total Mortality (Zd)

.i::.

41-95 I Size Range (mm FL) 31-90 31-90 31-85 36-90 w l.D

Table 4-31 Mortality rates of engraulid eggs, larvae and adults.

Instantaneous Days at Surv 1'ral Daily 1

Survival Stage per day Mortality Stage Species (S) (d) (Sd) (Zd) Source 2

Egg Bay anchovy 1 0.17-0.28 1. 763-1.276 Present Study (Anchoa mitchilli)

Black sea anchovy 0.060 2.5 o. 325 1.1254 Dekhnik, 1963; Nikolskii, (Engraulis encrasicholus) 1969; (Not seen; cited.in Dahlberg, 1979)

Egg and Japanese anchovy 0.0009 31 0.799 0.2262 Nakai et al., 1955; (not larval (§_. japonica) seen; cited in Dahlberg, 1979)

Pro larval Black sea anchovy 0.383 1.5 o. 527 o. 6398 Dekhnik, 1963; Nik.olskii, 1969; (not seen; cited in Dahlberg, 1979) 3 Pro- and Northern anchovy 0.001 ca. 29 o. 820 0.1711 Lenarz, 1972; (not seen; postlarval (§_. mordax) cited in Dahlberg, 1979);

Smith, 1981 4

Postlarval Bay anchovy 0.08483 Present Study Juvenile nay anchovy 0.04275 Present Study Adult Eay anchovy 0.00445 Present Study Northern anchovy 0.379 365 o. 621 0.00266 Hanan, 1981 1

zd = lnS/d 2

1974-1977 3

3-16 mm TL larvae 4

average (1973-1978); 3-20 mm TL larvae

4-41 BAY ANCHOVY - 1970-1982 ALL GEARS

~l JAN

~ ~

N= 63 I~

FEB 0

• nJb I ii N = 16

~~

MAR 0

• p=id11 I ~ N= 993

~~

APR o, I ~. N = 12021

~

MAY F5

~

1l N= 44920

~l JUN

~

&l 0 . N = m13 gJ o, I

a. ' I I Ql 20, JUL t

~a 1~

0, r=P~~I N= 52999

~~

Ii!

AUG N= 66822 0 I I

~, SEP 1~ r=i=Cfittr-H l N= 46868

~

~l OCT 0

• r=rdftD I I I f--t-i. N= ~7!!

~~

NOV N= 9016 01 1

~~

DEC r=~

N= 220 i3 0, I I I j I 0 lO .20 30 40 so llO '10 eo ;o lOO .llO 120 FORK LENGTH (MM)

Length-frequency distribution of bay anchov I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY taken by seine, trawl and gill net during present study, 1970-1982.

Figure 4-1 I

l

4-42 BAY ANCHOVY - 1970-1978 ALL GEARS JAN u

0.

INSUFFICIENT SAMPLE SIZE N=4

~~ FEB 20 103 0 ' ' I I nili ' I ' I n I ' I I I N = 16

~~

MAR

~Jfl I [ ~

N= 930 01 I I I I ' I

~~

APR N= 6347 0, P"= I

' I I I ' I I

~~

MAY r=F4~

N = 14597 0,

~ ' I ' I

' I I ' I E=!

~~

JUN

~

0

~ FrrdlJlTh__, N = 11360 I I I I

a. D' ' I ' I

' I al

~~

~

< JUL ti !i N = 14589

~ 0, r I I I

' ' I

§

~i AUG

...fl!

ii 0, ' rnlllb=rrfiltp_. I I I ' I N = llli62 SEP 11 0, ' I I I ' I I N = 15638

~

OCT N = 14326 81 I ,..--- I ' I I I

~~

NOV N = 7599 0, ' I ' I F= I I I ' I I DEC 1l 0 10 I ' Zl I"' rriltrom-.

so 40 50 80 70 80 QO I

lOO I ' I l10 I

120 N= m FORK LENGTH (MM)

.II Length-frequency distribution of bay anchov PUBLIC SERVICE ELECTRIC AND GAS COMPANY taken by seine,trawl and gill net in the Ar ti fie ial Island area ( rkm 64-97) ,

SALEM 316(b) STUDY Figure 4-2

4-43 BAY ANCHOVY - 1979-1982 ALL GEARS

~l JAN I I ' I ~~ ct=-r-rF=J I I I I N = 50 FEB u

0

• INSUFFICIENT SAMPLE SIZE N = 0

~~~l MAR I I I I ditrfTh r=r=i I ' I I I N= 63 APR 1l I I I I I ~ I I I I N = 5674

~~

MAY

~.

15 10 N = 30323 6

§ 0

• I I I I I I I ' I

~

~~

JUN

~

~

N= 35753

~ 01 I I I I I I I I I I ' I

'1.

fl.I

~l

< lUL

~ N = 38410

~ 0, I I I I I I I

§ ft! AUG

=.

1l r=r=rrCth-1 I I f1=h-==r, I I I I I I N= 40160

~~

SEP N = 31220 o, I I I I I I I

~~

OCT n I

• I I I ' I I N = 10391 NOV 1l I I I r I I I I N = 14fl

~~

DEC

3 0,

0 10 I

20 I r=rITb rrf}-[b so 40 tiO eo '10 eo I

QC I

100

' .noI I 12.0 N= 49 FORK LENGTH (MM)

Length-frequency distribution of bay anchov PUBLIC SERVICE ELECTRIC AND GAS COMPA.~

by seine, trawl and gill net in the Delawar Estuary (rkm 0-117), 1979-1982. .

SALEM 316(b) STUDY Figure 4-3

4-44 BAY ANCHOVY - 1979 4.9 M TRAWL l

JAN INsumCIENT SAMPLE SIZE N=O l

FEB INsumCIENT SAMPLE SIZE N= 0

' I

!l MAR INSUFFICIENT S.AYPLE SIZE N= 0 APR

1 ~

N = 4206 i~o, MAY

~

N= 0281 51

!'ii F" C!J E:1

~~

~

JUN

~

0 N= 0464 m  ::i 01 I a..

t.'J

~l

< JUL

~

~

g 0' r=r-fTh ~ N= 6904 fi!i;.,

,~

AUG 0 I -rdIIttb ~, I N = 15669

,~o, SEP rrc(([t]~, N = 3784 11~

~

OCT N= 260 o,

~~

NOV

~i 0 I ~ n bn=, N= 227 i~

DEC

i 0 ' I I r=d1b rdlfr1 eo ao I

eo I I I N = 49 I

0 1D 20 90 40 60 'IO 100 l10 Im FORK LENGTH (MM)

Length-frequency distribution of bay anchov PUBLIC SERVICE ELECTRIC AND GAS COMP.A..-..Y taken by 4.9-m trawl in the Delaware SALEM 316(b) STUDY Estuary, 1979.

Figure 4-4 J

4-45 BAY ANCHOVY - 1980 4.9 M TRAWL

~l J'AN I ' I ll1hrrn Ch--n---, I I N= 59 u

FEB INsumCIENT SAMPLE SIZE N= 0 0

• a;i,

r.s; :MAR 1~

0 I

~,

I ' I ctfrdlli =r=i I I I I APR N= 63 1~ ~

N= 1481

' I ' I ' I I I I

~~

MAY N= 70!7 i=l 0. ' I ' I ' I I I ' I 0

ES

~~

JUN

~

&l

('J N= 6452

~ 0. I I I ' I I I I al ij~

< JUL

~~

0 ll = 6945

&1 p

01 ' I ' I I ' I ' I (y

~SJ i=l AUG

~

r=. N= 6878 0, I I I I I ' I

~i SEP 1~

N = 7109 I .----i I I I I I

~~

OCT N= 2951 0 I I ' I ' I I I 20, NOV r-~

~,

1~

N = 1190 I ' I I I I I I~

DEC INSUFFICIENT SAMPLE SIZE N=O 0, I ' I I I I I I I I I I I eo eo eo no 0 10 20 30

"° 50 'l'O 100 1EO FORK LENGTH (MM)

Length-frequency distribution of bay anchov PUBLIC SERVICE ELECTRIC AND GAS COMPANY taken by 4.9-m trawl in the Delaware Estuary, 1980.

SALEM 316(b) STUDY Figure 4-5

4-46 I

BAY ANCHOVY - 1981 4.9 M TRAWL

.IAN INSUFFICIENT SAMPLE SIZE N=O H

0

!l FEE INSUFFICIENT SAMPLE SIZE N =0 MAR H

0 INSUFFICIENT SAMPLE SIZE N= 0 APR u

0 INSUFFICIENJ' SAMPLE SIZE N=O

~~

MAY

~

0 0, rrrrfrb N= 981 i ~~

~.

JUN

<;) N= 2049 1g:j

~ 0, t:ll

~~

< JUL

<;)

~

Of 0, . r=t=r=t=l- rJICtn-n N= 297'3 i~

li1

=.

AUG N = 2Zi'9 01 i~

i'EP N= 16:33 0*1 1 il ~.

OCT N= 2264 u

NOV INSUFFICIENT SAMPLE SIZE N= 0 0

il DEC lNsumCIENT SAMPLE SIZE N= 0 I I I I I I I I I I I I 0 lO 20 so 40 60 eo '10 l!O QC lOO :l10 l20 FORK LENGTH (MM) ength-frequency distribution of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA..-..Y taken by 4. 9-m trawl in the Delaware SALEM 316(b) STUDY stuary, 1981.

Figure 4-6 l

4-47 BAY ANCHOVY - 1982 4.9 M TRAWL JAN INSUmCIENT SAMPLE SIZE H

0, N = 0 l

FEB INsumCIENT SAMPLE SIZE N=O I I J MAR IN8UmCIEN'l' SAMPLE SlZE N = 0 H

0 '

APR lN8UmClENT SAMPLE SIZE N=O MAY N = 554 JUN N = !708 JUL N = 2126 AUG N = 2748 SEP N = 1033 OCT N = 801 NOV INSUFFICIENT SAMPLE SIZE N=O DEC INSUITI CIENT SAMPLE SIZE N=O so 40 50 ao ?O eo 100 l10 FORK LENGTli (MM) ength-frequency distribution of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA."1! aken by 4.9-m trawl in the Delaware SALEM 316(b) STUDY stuary, 1982.

Figure 4-7

4-48 BAY ANCHOVY - 1981 FIXED FRAME NET JAN H

0, INSUFFICIENT 5AYPLE SIZE N= 0 l

FEB INSUFFICIENT SAMPLE SIZE N=O MAR INSUFFICIENT SAMPLE SIZE H

0 '

N=O il 0 '

INSUFFICIENT SAMPLE SIZE APR N= 0

~~

MAY 0

~

10 5

0, rl~l N= 5358

~~ ~

JUN ra0 N= 8548

&l a.. 01 , I I I

(/)

251

< JUL

~ ~i 51 N= 8370

~ ol I a

~l

i:: AUG

=. N = 11143 251 SEP

~~

0 I l N= 9166 ij~

OCT 0 I rdtb F1==t N= 6930 NOV INSUFFICIENT SAMPLE SIZE H

0 N= 0 DEC INSUFFICIENT SAMPLE SIZE H

0 '

0 :20 '70 N= 0 10 30

"° 50 60 BO QO 100 110 120 FORK LENGTH (MM) 1 PUBLIC SERVICE ELECTRIC AND GAS SALEM 316(b) STUDY COMPA.~

Length-frequency distribu~ion of bay anchovy taken by fixed-frame net in the Delaware River Estuary, 1981.

Figure 4-8

.II 1

4-49 BAY ANCHOVY - 1982 FIXED FRAME NET 1AN INSUFFICIE.!'IT SAYPLE SIZE N= 0 ll l

FEB INSUFFICIENT SAYPLE SIZE N=O

' I MAR H

0

• INSUFFICIENT SAMPLE SIZE N= 0

!l APR INSUFFICIENT SAMPLE SIZE N= 0 0 * ' I I '

~~

MAY

~

N= 6909

zi 0 I I I 0

E:l

~

u

~

i.

ijj 0, I ~

JUN N= 7441 (fl i~ ~

< JUL t N= 9059

~

p 01 g

~l AUG

~

it:

. N= 10230 I I I I I

~l ~'

SEP N= 8272 0

• I I OCT 1l ~

N= 6185 NOV H0 INSUFFICIENT SAMPLE SIZE N= 0

1 INSUFFICIENT SAMPLE SIZE DEC B 0 I

ID I

20 I

30 I

40 I

50 GO I I 70 BO I I llO I

100 I

110 I

l20 N= 0 FORK LENGTH (MM)

Length-frequency distribution of bay PUBLIC SERVICE ELECTRIC AND GAS COMPANY anchovy taken by fixed-frame net in the

• SALEM 316(b) STUDY Delaware River Estuary, 1982.

Figure 4-9

"~

4-50 BAY ANCHOVY LARVAE - 1979

~

UN. 1-15 INSUFFICIENT SAMPLE SIZE N=O JAN. 16-31 INSUFFICIENT SAMPLE SIZE N=O ll FEB. 1-15 INsumCIENT SAMPLE SIZE N=O ll FEB. 16-28 INSUFFICIENT SAMPLE SIZE N' = 0 ll

!L YAR. 1-15 INSUFFICIENT SAMPLE SIZE N' =0 i=1 C!J E!i IL YAR. 16-31 I

11.

I'll INSUFFICIENT SAMPLE SIZE N' = 0

< APR. 1-'-15

>+ INSUFFICIENT SAMPLE SIZE N=O

~ ll I

!~

APR. 16-30 INSUFFICIENT SAMPLE SIZE N=O

!~

YS:l 1-15 INSUFFICIENT SAMPLE SIZE N=O ij 1lAY 16-31

~

N = flrrl

~l JtJN. 1-15 N = 1326

§~a, JUN. 16-30 0,

0 Jb=n 1 2 3 4 5 8 I

?

I a

l 9

I 10 I

11 I I I U!ISU26 I I le I

ti I

1B I I 19* 20 N = 919 TOTAL LENGTH (MY)

Length-frequency distribution of bay PUBLIC SERVICE ELECTRIC AND GAS COMPA..~ anchovy larvae taken by 0.5-m plankton net SALEM 316(b) STIJDY in the Delaware Estuary, January-June, 1979 Figure 4-10 '

4-51 BAY ANCHOVY LARVAE - 1979 i~gl JUL 1-15 N = 1040

~

JUL 16-31 N = 1004

~l AUG. 1-15 N = 1112 AUG. 16-31 N = 676 1l SEP. 1-15 N = 161

~

CJ il

~ SEP. 16-30

~

0 IN5UFFICIENT SAMPLE SIZE N=O

&1 p.. ll Ol

-< OCT. 1-15

>- INSUFFICIENT SAMPLE SIZE N=O I ll

~l l!=1 OCT. 16-31 P::

"" N = 37 NOV. 1-15 INSUFFICIENT SAMPLE SIZE N=O ll l

NOV. 16-30 IN5UmCIENT SAMPLE SIZE N=O

~ INSUFFICIENT SAMPLE SIZE DEC. 1-15 ii N=O I~

DEC. 16--31 INSUFFICIENT SAldPLE SIZE N=O 0, I Q 1 TOTAL LENGTH (MY) ength-frequency distribution of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY larvae taken by 0. 5-m plank tori net in the elaware Estuary, July-December, 1979

• SALEM 3l6(b) STUDY Figure 4-11 I

r

4-52 BAY ANCHOVY LARVAE - 1980 JAN. 1-15 INSUFFICIENT SAMPLE SIZE N=O ll JAN. 16-31 INSDmCIENT SAMPLE SIZE N=O ll u

FEB. 1-15 INSUFFICIENT SAli!PI.E SIZE N=O 0

l FEB. 16-29 INSUFFICIENT SAli!PI.E SIZE N=O MAR. 1-15 INSUFFICIENT SAMPLE SIZE N=O IE<1 0

ll

~

il MAR. 16-31

§ INSUFFICIENT SAli!PI.E SIZE N=O

~ o, t/l

< APR. 1-15 INSUFFICIENT SAMPLE SIZE t; N=O il II':< INSUFFICIENT S.AldPLE SIZE APR. 16-30 N=O ll ll MAY 1-15 INSU:FFICIENT SAMPLE SIZE N=4

~l Jb MAY 16-31 N = 894 I

~l dbu JUN. 1-15 N = 2292 F=r= I

~~BJ JUN. 16-30 0,

0 db,___

1 2 3 4. 5 6 7 8 I

II I

ID I

l1 I

12 I

l3 I

14.

I 15 I

1S I

fl I

16 I

19 I

20 .

N = 1098 TOTAL LENGTH (W)

Length-frequency distribution of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY larvae taken by 0.5-m plankton net in the Delaware Estuary, January-June, 1980.

SALEM 316(b) STUDY Figure 4-12

4-53

• BAY ANCHOVY LARVAE

~~ r-fii--n__, I

- 1980 I I I I I I I I I I I I

.TUL 1-1.5 N = Z"/22.

~~ .TUL 16-31 11 ~

N = 2t79 I I I I I I I I I I I I

~l AUG. 1-1.5 N = 1402 I I I I I I I I I I

~l Ui=t--n AUG. 16-31 N = 506 r r=1 I I I I I I ' I I I I

i SEP. 1-15 l':1 C!J E'.S

~~

u;,

~ I r=t- r==F=F=t=F=t==r I N = !lB SEP. 16-30 fJ ~i

<:,)

&l'1.

ill g1 I n N = 100

< ~::i ocr. 1-1.5

~ ii I I I I n III Dn-dith I N = 25

~~

OCT. 16-31 fie.

01 I I I I I n=r=n n~ N = 32

~l NOV. 1-15 I I I I I I r=n I I I I I I I Dn N=?

l NOV. 16-30 INSUFFICIENT SAMPLE SIZE N=O I I I I I I I I I I I I I I I I I I I I

~i DEC. 1-15 INsufflCIENT SAMPLE SIZE n I I I I I I I I I I I I I I I I I I I I N=O DEC. 16-31 H

0 '

0 1 2 3 4 5 s INSUFFICIENT SAMPLE SIZE

'l a II 10 l1 l2 l3 14. 16 18 11 18 19 20 N=O TOTAL LENGTH (MY)

Length-frequency distribution of bay anchov PUBLIC SERVICE ELECTRIC AND GAS COMPANY larvae taken by 0.5-m plankton net in the SALEM 316(b) STUDY Delaware Estuary, July-December, 1980.

Figure 4-13

4-54 BAY ANCHOVY LARVAE - 1981

!l JA.L"f. 1-15 INSUFFICIENT SAMPLE SIZE N=O

!l

.IAN. 16-31 INSUFFICIENT SAMPLE SIZE N=O il FEB. 1-15 INSUFFICIENT SAMPLE SIZE N = 0 0,

!l FEB. 16-28 INSUFFICIENT SAMPLE SIZE N = 0 l

MAR 1-15 INSUFFICIENT SAMPLE SIZE N=O i=1

~

~

~

MAR 16-31

~ INSUFFICIENT SAMPLE SIZE N = 0

~p.,

O'l il

< APR 1-15 0

INSUFFICIENT SAMPLE SIZE N = 0 z

!3Cl' l

~

APR 16-30 INSUFFICIENT SAMPLE SIZE N=O

!l

MAY 1-15 INSUFFICIENT SAMPLE SIZE N=O il50, Jb YAY 16-31 N = 81 0 '

JUN. 1-15

~~ ft6-i N = ?28

~l ~

JUN. 16-30 N = 1007 0, F r--9 I I I I I I I I I 0 1 2 3 4 5 6 7 a 9 1D u l2 l3 14 15 18 11 18 Ul 20 TOTAL LENGTH {MM:)

Length-frequency distribution of bay anchov~

PUBLIC SERVICE ELECTRIC AND GAS COMPANY larvae taken by 0.5-m plankton net in the SALEM 316(b) STUDY Delaware Estuary, January-June, 1981.

Figure 4-14 I

]

4-55

• BAY ANCHOVY LARVAE - 1981 JUL. 1-15 N = 2166 JUL. 16-31 N = 2147 AUG. 1-15 N = 1672 AUG. 16-31 N = 1395 SEP. 1-15 N = 378 SEP. 16-30 N = 1l2 OCT. 1-15 N = 67 OCT. 16-31 H INSUFFICIENT SAMPLE SIZE o~.~r--r--....~r--r--r---.~or--.----.~..-.....--.-~~....--~~~~~~

N = 0 4~031~3.~..--.--....~..-....---..---.~~-.----.~..-~-.-~~....--~~~~~~

NOV. 1-15

~ INSUFFICIENT SAMPLE SIZE N = 0

!l NOV. 16-30 INSUFFICIENT SAMPLE SIZE N'= 0 DEC. 1-15 IN3UmCIENT SAYPLE SIZE N=O DEC. 16-31 INSUFFICIENT SAMPLE SIZE N=O I I 0 fl 18 TOTAL LENGTH (MM)

' PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Length-frequency distribution of bay anchovy larvae taken by 0.5-m plankton net in the Delaware Estuary, July-December, 1981.

Figure 4-15 I

4-56

~i n

BAY ANCHOVY LARVAE - 1982 INSUFFICIENT SAMPLE SIZE JAN. 1-15 N=O

!~

JAN. 16-31 INSUFFICIENT SAMPLE SIZE N=O ii 0

FEB. 1-15 H

0 INSUFFICIENT SAMPLE SIZE N=O i~

FEB. 16-28 INSUFFICIENT SAMPLE SIZE N=O ii 0

MAR. 1-15 r=l c

u O-r I I ,- T I INSUWICIENT SAMPLE SIZE

---r--r------.-----r I I r r---.---, '

N=O ES MAR. 16-31

~?'

INSUFFICIENT SAMPLE SIZE

l gj 0..

~'::I H T N=O i~

..; APR 1-15

>- INSUFFICIENT SAMPLE SIZE N=O u

~

a i~

fl? APR 16-30

, INSUFFICIENT SAMPLE SIZE N=O 0

lUJ MAY 1-15 N = 16 ij~Jh-,,,,,,,.,,,,,,,,

MAY 16-31 N = 1154<'3 i~g1r=~1111111111 JUN. 1-15 N = 656

~~ ~

JUN. 16-:30 N = 1937 J 0, I I I r-1 r=l I I I I I o 1 2 3 4 s e ' a 9 w u ~ ~ u ~ ~ ~ ~ w ~

TOTAL LENGTH (MM)

1 Lengthrfrequency distribution of bay anchov PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY larvae taken by 0.5-m plankton net in the Delaware Estuary, January-June, 1982. I Figure 4-16 I

1

4-57 BAY ANCHOVY LARVAE - 1982 JUL 1-15 N = 1.:357 r=-1 JUL 16-31 N = 2191 AUG. 1-15 N = 698 AUG. 16-31 N = 1384 SEP. 1-15 N = 300 SEP. 16-30 N = 613

,~

OCT. 1-15 N = 149 0 i OCT. 16-31 N = 104 NOV. 1-15 INSUFFICIENT SAMPLE SIZE N=O l

NOV. 16-30 INSUFFICIENT SAMPLE SIZE N=O

• I DEC. 1-15 INSUFFICIENT SAYPLE SIZE N=O I~

. DEC. 16-31 INSUFFICIENT SAMPLE SIZE N=O Q

• 0 TOTAL LENGTH (MY) ength-frequency distribution of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.'rl arvae taken by 0.5-m plankton net in the SALEM 316(b) STUDY elaware Estuary, July-December, 1982.

Figure 4-17

4-58 BAY ANCHOVY EGGS MAY 22-24, 1979 DELAWARE RIVER ESTUARY, rkm. 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > 0.0 TO 12268.0

~ > 12268.0 TO 24536.0 8 > 24536.0 TO 36804.0 I > 36804.0 TO 49072.0 N

i DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-18

4-59 BAY ANCHOVY EGGS MAY 29 - JUN. 1, 1979 DELAWARE RIVER ESTUARY, rkm. 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 121 > 0.0 TO 9540.5

~ > 9540.5 TO 19081.0 Ul.l > 19081.0 TO 28621.5 II > 26621.5 TO 38162.1 N

i DELAWARE 3 .

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.'lY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-19

4-60 BAY ANCHOVY EGGS JUN. 5-7, 1979 DELAWARE RIVER ESTUARY, rkin 0-117 LEGE.l"\fD DENSITY PER 100 CUBIC METERS D 0.0 0 > 0.0 TO 943.0

~ > 943.0 TO 1886.0 llll > 1886.0 TO 2829.0 I > 2829.0 TO 3772.0 N

I.

i DELAWARE

. 3 ean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA..'N ggs J based on o. 5-m plankton net sampling' SALEM 316(b) STUDY elaware River Estuar

• Figure 4-20

4-61 BAY ANCHOVY EGGS JUN. 12-14, 1979 DELAWARE RIVER ESTUARY, rkrn 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > 0.0 TO 6063.0

~ > 6063.0 TO 12126.0 U!I > 12126.0 TO 18189.0 Ill! > 18189.0 TO 24252.0 N

i DELAWARE

~

[

[

3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, J SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-21 I

4-62 BAY ANCHOVY EGGS JUN. 25-29, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D a.a

!21 > o.a TO 6374.a

~ > 6374.0 TO 12748.a

!!!J > 12748.0 TO 19122.0 I > 19122.0 TO 25496.0 N

t DELAWARE l

3 Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, :I SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-22 1

I

4-63 BAY ANCHOVY EGGS JUL. 9-12, 1979 DELAWARE RIVER ESTUARY, rkni 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > 20.0 TO 6087.5

~ > 6087.5 TO 12155.0 DJ! > 12155.0 TO 18222.5 I 18222.5 TO 24290.0 N

.A I

DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling,

1. SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-23

______ j

4-64

. BAY ANCHOVY EGGS JUL. 16-20, 1979 DELAWARE RIVER ESTUARY, rk:rn 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 12! > 20.0 TO 4738.5 til > 4738.5 TO 9457.0 DI! > 9457.0 TO 14175.5 I > 141755 TO 18894.0 N

DELAWARE 1

3 Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 3l6(b) STUDY Delaware River Estuary.

Figure 4-24 I

4-65 BAY ANCHOVY EGGS JUL. 24-27, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 0 > 170.0 TO 6437.0 t!! > 6437.0 TO 12704.0

!'i!I > 12704.0 TO 18971.0

!Iii 18971.0 TO 25238.0 N

i DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

I Figure 4-25

4-66 BAY ANCHOVY EGGS AUG. 6-9, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 .> 0.0 TO 3451.0

~ > 34510 TO 6902.0 D!! > 6902.0 TO 10353.0 I > 10353.0 TO 13804.0 N

i DELAWARE I

1 PUBLIC SERVICE ELECTRIC AND GAS COMPA.'n' SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-26 3

Mean density (number/lOOm ) of bay anchovy eggs, based on 0.5-m plankton net sampling,

.II 1

4-67 BAY ANCHOVY EGGS AUG. 20-24, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 18.665

~ > 18.665 TO 37.330 11!1 >. 37.330 TO 55.995 I > 55.995 TO 74.660 N

'I D::E:LAWARE l

l

(

3 Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC A.>qn GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 3l6(b) STUDY Delaware River Estuary.

Figure 4-27 I

I

4-68 BAY ANCHOVY EGGS SEP. 10-13, 1979 DELAWARE RIVER ESTUARY, rkin 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 10.845

!j(l > 10.845 TO 21.690

!!!! > 21.690 TO 32.535

!Ill > 32.535 TO 43.380 N

i

• DELAWARE 1

PUBLIC SERVICE ELECTRIC AND GAS COMPA.'n SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-28 3

Mean density (number/lOOm ) of bay anchovy eggs, based on o.s-m plankton net sampling,

.I1

4-69

• BAY ANCHOVY EGGS

-ocT. 29 - NOV. 2, 1979 DELAWARE RIVER ESTUARY. rkin 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 0.235

~ > 0.235 TO 0.470 DD > 0.470 TO 0.705 I > 0.705 TO 0.940 NEW JERSEY

• i N

DELAWARE

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-29

4-70 BAY ANCHOVY EGGS MAY 5-7, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 41.360

~ > 41.360 TO 82.720 D!! > 82.720 TO 124.080 I > 124.080 TO 165.440 N

I DELAWARE

-3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-30

4-71

• BAY ANCHOVY EGGS MAY 19-22, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DE.i'\lSITY PER 100 CUBIC METERS D 0.0 0 > 0.0 TO 9243.0

~ > 9243.0 TO 18486.0 D!I > 18486.0 TO 27729.0 ill > 27729.0 TO 36972.0 N

'I DELAWARE 3

Mean density (m.nnber/100m ) of ba)'.' anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA."IY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-31

4-72 BAY ANCHOVY EGGS JUN. 2-6, 1980 DELAWARE RIVER ESTUARY, rkln 0-1!7 LEGEND DEJ.'JSITY PER 100 CUBIC METERS D 0.0 0 > 0.0 TO 10915.5

~ > 10915.5 TO 21831.0 9 > 21831.0 TO 32746.5 II > 32746.5 TO 43662.0 N

t I

DELAWARE I

3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA...~ eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-32

4-73

• BAY ANCHOVY EGGS JUN. 9-12, 1980 DELAWARE RIVER ESTUARY, rkrn 0-117 LEGEND DEl'lSITY PER 100 CUBIC METERS Q 0.0 0 > 0.0 TO 4314.0

~ > 4314.0 TO

• 8628.0 Di! > 8628.0 TO 12942.0 11 > 12942.0 TO 17256.0 NEW JERSEY N

DELAWARE 3

Mean density (number/100m ) of bay anchovy eggs, based on o.s-m plankton net sampling; PUBLIC SERVICE ELECTRIC AND GAS COMPANY Delaware River Estuary.

SALEM 316(b) STUDY Figure 4-33

4-74 BAY ANCHOVY EGGS JUN. 16-20, 1980 DELAWARE RIVER ESTUARY, rkrn 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.o 121 > 0.0 TO 8294.0

~ > 8294.0 TO 16588.0 Im > 16588.0 TO 24882.0 I > 24882.0 TO 33176.0 i

N DELAWARE I

PUBLIC SERVICE ELECTRIC AND GAS COMPA.."iY SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-34 3

Mean density (number/lOOm ) of bay anchovy eggs, based on 0.5-m plankton net sampling,

.II I

4-75 BAY ANCHOVY EGGS JUL. 7-11, 1980 DELAWARE RIVER ESTUARY, rkin 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > 0.0 TO 7?68.5

~ > 7768.5 TO 15537.0

~ > 15537.0 TO 23305.5 a > 23305.5 TO 31074.0 N

i DELAWARE

' PUBLIC SERVICE ELECTRIC AND GAS COMPA.'r!

. 3 Mean density (number/lOOm ) of bay anchovy eggs, based on 0.5-m plankton net sampling,

'* SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-35

4-76

~----------------~~-

BAY ANCHOVY EGGS JUL. 14-18, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS Q o.o 0 > 0.0 TO 13053.0

~ > 13053.0 TO 26106.0

~ 26106.0 TO 39159.0 I > 39159.0 TO 52212.0 N

'I DELAWARE I

I PUBLIC SERVICE ELECTRIC AND GAS COMPANY Mean density (number/lOOmj) of bay anchovy eggs, based on 0.5-m plankton net sampling, Delaware River Estuary.

I SALEM 316(b) STUDY Figure 4-36 I

I

____ .:::~==-- - - --

---~--

4-77

• BAY ANCHOVY EGGS JUL. 21-24, 1980 DELAWARE RI VER ESTUARY, rkm 0-117 LEGEND DE.i'\fSITY PER 100 CUBIC METERS 0 0.0 121 > 0.0 TO 14006.0

~ > 14006.0 TO 28012.0 ll!l > 28012.0 TO 42018.0 I 42018.0 TO 56024.0 N

i DELAWARE 3

Mean density (ntnnber/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-37

4-78 BAY ANCHOVY EGGS AUG. 4-7, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 0 > a.a TO 730.5

~ > 730.5 TO 1461.0 ll!l > 1461.0 TO 2191.5

!ill > 2191.5 TO 2922.0 i

N DELAWARE I

l PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 3l6(b) STUDY Delaware River Estuary.

Figure 4-38 3

Mean density (number/100m ) of bay anchovy eggs, based on 0.5-m plankton net sampling,

.II I

4-79

• BAY ANCHOVY EGGS AUG. 18-23, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.00 0 > 0.00 TO 5L85

~ > 5L85 TO 103.70 s > 103.70 TO 155.55 II > 155.55 TO 207.40 N

t DELAWARE Mean density (number/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY eggs, based on 0. 5-m plankton net sampling' Delaware River Estuary.

Figure 4-39 I

I

4-80 BAY ANCHOVY EGGS SEP. 8-12, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 14155

~ > 14155 TO 28.310

!ID > 28.310 TO 42.465 I > 42.465 TO 56.623 NEW JERSEY N

i I

DELAWARE I

.II

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-40 I

4-81

• BAY ANCHOVY EGGS SEP. 22-29, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS

[l 0.000 0 > 0.000 TO '10.735

~ > 10.735 TO 21470 s > 2L..fi'O TO 32.205 II > 32.205 TO . 42.940 NEW JERSEY N

t DELAWARE ATLAl'iTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY eggs, based on 0. 5-m plankton net sampling, Delaware River Estuary.

Figure 4-41 I

I

4-82 BAY ANCHOVY EGGS MAY 11-14, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > o.o TO 1029.5

~ > 1029.5 TO 2059.0 Im . > 2059.0 TO 3088.5 11 > 3088.5 TO 4118.0 N

I DELAWARE J

3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, I SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-42

• I I

4-83

• BAY ANCHOVY EGGS MAY 18-22, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND .

DENSITY PER 100 CUBIC METERS 0 o.o 0 > 0.0 TO 2898.0 M > 2898.0 TO 57.96.0 11!1 > 5796.0 TO 8694.0 I > 8694.0 TO 11592.0 N

t DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-43

4-84 BAY ANCHOVY EGGS MAY 26-28, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 121 > 0.0 TO 2662.5

~ > 2662.5 TO 5325.0

!ID > 5325.0 TO 7987.5 I > 7987.5 TO 10650.0 i

N DELAWARE I

PUBLIC SERVICE ELECTRIC AND GAS COMPA.'i"!

SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-44 3

Mean density (number/lOOm ) of bay anchovy eggs, based on 0.5-m plankton net sampling,

.II I

4-85

• BAY ANCHOVY EGGS JUN. 8-11, 1981 DELAWARE RIVER ESTUARY, rkm. 0-lfl LEGEND DENSITY PER 100 CUBIC METERS D 0.0 0 > 0.0 TO 6976.0

~ > 6976.0 TO 13952.0 D!I > 13952.0 TO 20928.0 I > 20928.0 TO 27904.0

• t N

DELAWARE I

I 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 3l6(b) STUDY Delaware River Estuary.

I . Figure 4-45 I

4-86 BAY ANCHOVY EGGS JUN. 15-18, 1981 DELAWARE RIVER ESTUARY, rkm 0-1:17 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 121 > 0.0 TO 8142.5 tilJ > 8142.5 TO 16285.0 Dll > 16285.0 TO 24427.5 I > 24427.5 TO 32570.0 t

N DELAWARE J

PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-46 3

Mean density (number/lOOm ) of bay anchovy eggs, based. on 0.5-m plankton net sampling,

.II I

4-87

• BAY ANCHOVY EGGS

\

JUN. 22-26, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 0 > 0.0 TO 7810.5

~ > 7810.5 TO 15621.0 DD > 15621.0 TO 23431.5 I > 23431.5 TO 31242.0 N

'I DELAWARE

. 3 Mean density (nwnber/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling,

• SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-47

4-88 BAY ANCHOVY EGGS JUL. 6-10, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > 0.0 TO 6025.0

~ > 6025.0 TO 12050.0 11U > 12050.0 TO 18075.0 II > 18075.0 TO 24100.0 i

N DELAWARE 3

Mean density (num.ber/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-48

4-89

• BAY ANCHOVY EGGS JUL. 13-17, 1981

. DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > 0.0 TO 35772.5

~ > 35772.5 TO 71544.9 11!1 > 71544.9 TO 107317.0 I > 107317.0 TO 143089.0

• i N

DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on-0.5-m plankton net sampling, l

• SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-49 l

4-90 BAY ANCHOVY EGGS JUL. 20-24, 1981 DELAWARE RIVER ESTUARY, *rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.o l2l > 0.0 TO

• 12880.0

~ > 12880.0 TO 25760.0

!ID > 25760.0 TO 38640.0 I > 38640.0 TO 51520.0 N

i DELAWARE J

I I

3 Mean density (number/lOOm ) of bay anchovy I

PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-50 I

I

4-91 BAY ANCHOVY EGGS AUG. 3-6, 1981 DELAWARE RI VER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 121 > o.o TO 7807.0

~ > 7807.0 TO 15614.0

!Ill > 15614.0 TO 23421.0 I > 23421.0 TO 31228.0 N

t DELAWARE I

l 3

Mean density (number/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEK 316(b) STUDY eggs' based on 0. 5-m plankton net sampling' Delaware River Estuary.

Figure 4-51 I

I

4-92 BAY ANCHOVY EGGS AUG. 17-22, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 l2l > 0.000 TO 141.075

~ > 141.075 TO 282j5Q Ill > 282j5Q TO 423.225 I > 423.225 TO 564.300 N

i DELAWARE I

1 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY . eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-52 I

I

4-93 BAY ANCHOVY EGGS AUG. 31 - SEP. 3, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 217.480

~ > 2f7.480 TO 434.960 I > 434.980 TO 652.440 I > 652.440 TO 869.920 I

N i

DELAWARE ATLANTIC OCEAN Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-53 I

I

4-94 BAY ANCHOVY EGGS SEP. 14-18, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.085

~ > 0.085 TO 0.!70 1111 > 0.!70 TO 0.255 I > 0.255 TO 0.340 NEW JERSEY N

I DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-54

~---

4-95 I

• BAY ANCHOVY EGGS MAY 11-14, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > 0.0 TO 6329.5

~ > 6329.5 TO 12659.0 D!I > 12659.0 TO 189Ba5 II > 18988.5 TO 2531a2 N

i DELAWARE l

3 Mean density (number/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY eggs, based on 0.5-m plankton net sampling, Delaware River Estuary.

Figure 4-55

[

r

4-96 BAY ANCHOVY EGGS MAY 17-21, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.o

12) > 0.0 TO 25718.0

~ > 25716.0 TO 51432.0 11!1 > 51432.0 TO 77148.0 I > 77148.0 TO 102864.0 N

'I DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 3l6(b) STUDY Delaware River Estuary.

Figure 4-56

4-97 BAY ANCHOVY EGGS MAY 24-27,1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 121 > 0.0. . TO 12614.5

§ > 12614.5 TO 25229.0 au > 25229.0 TO 37843.5 I > 37843.5 TO 50458.0 N

• I I DELAWARE I

t I

. j Mean density (number/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS SALEM 316(b) STUDY COMP.A.~ eggs, based on 0.5-m plankton net sampling, Delaware River Estuary.

Figure 4-57 l

I

4-98 BAY ANCHOVY EGGS JUN. 7-10, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 0 > *o.o TO 2746.0

~ > 2746.0 TO 5492.0 lD > 5492.0 TO 8238.0 I > 8238.0 TO 10984.1 N

i

• DELAWARE 3

Mean density (number/lOOm ) o! bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs' based on 0. 5-m plankton net sampling'

• SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-58

4-99 BAY ANCHOVY EGGS JUN. 21-24, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 0 > 0.0 TO 7762.0

~ > 7762.0 TO 15524.0 Ill > 15524.0 TO 23286.0 II > 23286.0 TO 31048.0 N

i DELAWARE Mean density (m.unber/lOOm ) o.f bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0. 5-m plankton net sampling'

.SALEM 3l6(b) STUDY Delaware River Estuary.

Figure 4-59

4-100 BAY ANCHOVY EGGS JUN. 28 - JUL. *3, 1982 \

DELAWARE RIVER ESTUARY, rkm 0-1f7 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 0 > Q,Q TO .5857.5

§ > 5857.5 TO 11715.0 s > 11715.0 TO fl572.5 I > 17572.5 TO 23430.2 NEW JERSEY

• I I -

I ,

DELAWARE j

Mean density (number/lOOm ) of bay anchovy

• PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on O.S-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-60 I

4-101 BAY ANCHOVY EGGS JUL. 12-15, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D

• o.o 0 > 0.0 TO 7130.0

~ > 7130.0 TO 14260.0 DB > 14260.0 TO 21390.0 I > 21390.0 TO 28520.0

• N

• I DELAWARE

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-61 I

4-102 BAY ANCHOVY EGGS JUL. 19-23, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 0 > 0.0 TO 6919.0

!)g. > 6919.0 TO 13838.0

!ID > 13838.0 TO 20757.0 I > 20757.0 TO 27676.0 N

i DELAWARE l

l 3

Mean density (number/100m ) o.f bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-62

4-103

• BAY ANCHOVY EGGS JUL. 26-29, 1982 DELAWARE RIVER ESTUARY, rk:m. 0-117 LEGEND DENS I TY PER 100 CUBIC METERS 0 0.0 0 > o.o TO 7922.5

~ > 7922.5 TO 15845.0 D!I > 15845.0 TO 23767.5 II > 23767.5 TO 31690.0

• N DELAWARE I

I I

. j Mean density (ntUnber/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY eggs, based on 0.5-m plankton net sampling, Delaware River Estuary.

Figure 4-63 I

I

4-104 BAY ANCHOVY EGGS AUG. 9-13, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 121 > 0.0 TO 421.0 B > 421.0 TO 842.0 D!l > 842.0 TO 1263.0 II > 1263.0 TO 1684.0 N

i

• DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-64

• I I

4-105

• BAY ANCHOVY EGGS AUG. 23-27, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.o 0 > .Q.O TO 501.5

~ > 50L5 TO 1003.0 D!l > 1003.0 TO 1504.5 I > 1504.5 TO 2006.0

.N i

DELAWARE I. PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY 3

Mean density (number/lOOm ) of bay anchovy eggs, based on 0.5-m plankton net sampling, Delaware River Estuary.

I Figure 4-65

4-10'6 BAY ANCHOVY. EGGS AUG. 30 - SEP. 2, 1982 DELAWARE RIVER ESTUARY. rkm 0-117 LEGEND DENSITY .PER 100 CUBIC METERS D o.o l!I > 0.0 TO . 658.0

~ > 658.0 TO 1316.0 I > 1316.0 TO 1974.0 I > 1974.0 TO 2632.0 DELAWARE Mean density (number/lOOmj) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM.316(b) STUDY ~ Delaware River Estuary.

Figure 4-66

4-107

• BAY ANCHOVY EGGS SEP. 20-24, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 8.05 li.i1 > 8.05 TO 16.10 Ill! > 16.10 TO 24.15 I > 24.15 TO 3220 NEW JERSEY N

i DELAWARE J

I

~

Mean density (number/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY eggs, based on 0.5-m plankton net sampling, Delaware River Estuary.

I Figure 4-67 I

4-108 BAY ANCHOVY EGGS OCT. 4-5, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 121 > 0.00 TO 1.00 fiJ > 1.00 TO 2.00 s > 2.00 TO 3.00 e > 3.oo 'l!O 4.00 NZW JERSEY N

i

• 1i I

I; 1 11 11 11 1, l

/flf!ff/!j DELAWARE 1

ffjffjf}

!ff;/j I I ATLANTIC OCEAN 3

Mean density (number/lOOm ) of; bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY eggs, based on 0.5-m plankton net sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-68

(/)

~

BAY ANCHOVY EGGS - 1979

~ 35000 f:x1

~

8 30000 m

u 0 25000 0

~

.J:>.

I 15000 ........

0 l.O 10000 5000 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Mean density and 95% C.I. of bay anchovy eggs taken by 0.5-m plankton PUBLIC SERVICE ELECTRIC AliD GAS COMPANY net in the Delaware River Estuary, 1979.

SALEM 316(b) STUDY Figure 4-69

if)

~

f.:il 35000 BAY ANCHOVY EGGS 1980 E-t f.:il

~

u 1-f 30000 m

=>

u 0

25000 0

..-t

~

' f.:il 20000 p...

~

f.:il ~

m 15000 I

~ .......

=> 0 z

~

10000

>-t E-t 1-f if) 5000 z

f.:il Q

z 0 f.:il JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

~

Mean density and 95% C. I. of bay anchovy eggs taken by 0.5-m plankton PUBLIC SERVICE ELECTRIC Alill GAS COMPANY net in the Delaware River Estuary, 1980.

SALEM 316(b) STUDY Figure 4-70

Cf)

~

BAY ANCHOVY EGGS 1981 r:il 35000 E--t r:il

~

u 1-i 30000 f:Q

i u

0 25000 0

....-f

~

r:il 20000 11-t

~

,j:>.

r:il 15000 I f:Q .......

~ .......

i .......

z

~

10000

~

E--t 1-i Cf) 5000 zr:il Q

z 0 r:il JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

~

Mean density and 95% c.r. of bay anchovy eggs taken by o.s-m plankton PUBLIC SERVICE ELECTRIC Alm GAS COMPANY net in the Delaware River Estuary, 1981.

SALEM 3~6(b) STUDY F:!gure 4-71

Cf)

~

BAY ANCHOVY EGGS - 1982

~ 35000

~

~

~ 30000 80 25000 0

..-1 f!l 20000

~

~

~

~ 15000 I I-'

~ I-'

~

N 10000 5000 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Mean density and 95% C.I. of bay anchovy eggs taken by 0.5-m plankton PUBLIC SERVICE ELECTRIC AlW GAS COMPANY net in the Delaware River Estuary, 1982.

SALEM 316(b) STUDY Figure 4-72

4-113 BAY ANCHOVY EGGS 1979 30000 rkm 113-117 0

30000 rkm 97-113 r.n

~

r:il 0

~

r:il 300001

!! rkm 80-97

- oL C)

I ll C) 30000 A ts A~AA A1 A AA j A A I A A 4 0 rkm 64-80 0

..-f

• ~

r:il 0 P--t 30000

~

. r:il rkm 48-64 Ill

> 0 z 30000 rkm 32-48

~

z r.n r:r:I Q

0 30000 z rkm 16-32 r:il

?J 0 30000 rkm 0-16 Q I JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy eggs, based on 0.5-m plankton net tows, Delaware PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY River Estuary - 1979.

Figure 4-73

4-114 BAY ANCHOVY EGGS - 1980 30000 rkm 113-117 0

30000 rkm 97-113 rn

~

~ 0 E-t

~ 30000

~ rkm 80-97

-u I ll 0

u 0

30000 0 rkm 64-80 0

..-I

~

i::i:.l 0

~

30000

~ rkm 48-64 i::i:.l m

~

0 0 z

30000 rkm 32-48

>i E-t rn z

~

Cl 0

30000 z rkm 16-32

~

~

0 30000 rkm 0-16 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy eggs, PUBLIC SERVICE ELECTRIC AND GAS COMPANY based on 0.5-m plankton net tows, Delaware SALEM 316(b) STUDY River Estuary - 1980.

Figure 4-74

4-115 BAY ANCHOVY EGGS - 1981 30000 rkm 113-117 0-+---""T"---......-----.----h-~.,,,,.,._,~i!r-T-.~~.-.t!,........,q,,~-f'r-&---..------.------.

30000 rkm 97-113 en

~

r:4 0 E-t r:4 30000

~ rkm 80-97 u

m u

0 ir""i!. ~ A  :+ A ~ :6 30000 0 rkm 64-80 0

..-I

~

~ 0 11-t 30000

~ rkm 48-64 r:4

• m

~

0 0 z

...._ 30000 rkm 32-48

-~

E-t en z

~

0 0

30000 z rkm 16-32

~

a 0 30000 rkm 0-16 l

I J.AN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC I.

I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Regional mean density of bay anchovy eggs, based on 0.5-m plankton net tows, Delaware River Estuary - 1981.

Figure 4-75

4-116 BAY ANCHOVY EGGS - 1982 30000 rkm 113-117 0

30000 rkm 97-113 en

~

r='.l 0 E-i r='.l 30000

~ rkm 80-97

-m u

0 u

0 30000 0 rkm 64-80 0

~

Pz:l 0

~

30000

~ rkm 48-64 Pz:l m

=

- 0 z

>i 30000 0

rkm 32-48

-z E-i en r='.l 0

Q 30000 z rkm 16-32 r='.l

21 0 30000 rkm 0-16 I

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC I

PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Regional mean density of bay anchovy eggs, based on 0.5-m plankton net tows, Delaware River Estuary - 1982.

Figure 4-76

.II I

4-117 BAY ANCHOVY PROLARVAE (1-3 MM)

MAY 22-24, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0* > o.o TO 315.0

!i1I > 315.0 TO 630.0 11!1 > 630.0 TO 945.0 I > 945.0 TO 1260.0 N

i DELAWARE 3

Mean density (number/lOOm ) 0£ bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on o.s-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-77 I

118 BAY ANCHOVY PROLARVAE (1-3 MM)

MAY 29 - JUN. 1, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.00 0 > 0.00 TO 118.80

~ > 118.80 TO 237.60 1111 > 237.60 TO 356.40 II > 356.40 TO 475.20 N

i DELAWARE I

3

. Mean density (number/100m ) of bay anchovy I

PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

- Figure 4-78 I

I

4-119 BAY ANCHOVY PROLARVAE (1-3 MM)

JUN. 5-7, 1979 DELAWARE RIVER ESTUARY, rkID. 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 IZI > 0.000 TO 1.485

~ > 1.485 TO 2.970.

Im > 2.970 TO 4,495.

I > 4.455 TO 5.940 NEW JERSEY N

t DELAWARE ATLANTIC r* OCEAN r

I 3

Mean density (number/lOOm ) of bay anchovy I

I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY prolarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

Figure 4-79 I

I

4-120 BAY ANCHOVY PROLARVAE (1-3 MM)

JUN. 12-14, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.00 0 > 0.00 TO Ul.70 t'!I > 111.70 TO 223.40 1111 > 223.40 TO 335.10 I > 335.10 TO 446.84 N

i DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SER.VICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-80

4-121 BAY ANCHOVY PROLARVAE (1-3 MM)

JUN. 25-29, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.00 0 > 0.00 TO 132.90 fi!I > 132.90 TO 265.80 llD > 265.80 TO 398.70 I > 398.70 TO 531.60 i

DELAWARE

(

. 3 l PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY

. Mean density (number/lOOm ) of bay anchovy prolarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

Figure 4-81 I

4-122 BAY ANCHOVY PROLARVAE (1-3 MM)

JUL. 9-12, 1979 DELAWARE RIVER ESTUARY, rkm 0-1!7 LEGEND DENSITY PER 100 CUBIC METERS 0 0.,00 121 > 0.00 TO 134.60 M > 134.60 TO 269.20*

Dll > 269.20 TO 403.80 I > 403.80 TO 538.40 N

t DELAWARE ATLANTIC OCEAN l

PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY .

3 Mean density (number/lOOm ) of bay anchovy prolarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

Figure 4-82

.II I

4-123

• BAY ANCHOVY PROLARVAE (1-3 MM)

JUL. 16-20, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 l2l > 0.00 TO 227.35

~ > 227.35 TO 454.70 au > 454.70 TO 682.05 Ill > 682.05 TO 909.40 N

t DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-83

4-124 BAY ANCHOVY PROLARVAE (1-3 MM)

JUL. 24-27, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC .METERS D 0.00 0 > 0.00 TO 215.30

~ > 215.30 TO 430.60 1111 > 430.60 TO 645.90 I > 645.90 TO 861.20

.N I

DELAWARE 1

3 .

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY prolarvae, based on 0.5-m plankto~_net sampling, Delaware River Estuary.

• I Figure 4-84 I

I

4-125

• BAY ANCHOVY PROLARVAE (1-3 MM)

AUG. 6-9, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS

-0 0.00 0 > 0.00 TO 165.15

~ > 16515 TO 330.30 1111 > 330.30 TO 495.45 I > 495.45 TO 660.60 N

'I t

I r DELAWARE I

[

3 I Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-85 I

I

4-126 BAY ANCHOVY PROLARVAE (1-3 MM)

AUG. 20-24, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.ooo 0 > 0.000 TO 0.605

~ > 0.605 TO 1210

[ID > 1210 TO 1815 I > 1.815 TO 2.420 NEW JERSEY N

4 I

DEL.AWARE 1

3 PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) ST!JDY Mean density (number/100m ) of bay anchovy prolarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

I Figure 4-86 I

1

4-127

• BAY ANCHOVY PROLARVAE (1-3 MM)

SEP. 10-13, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.865

~ > 0.865 TO 1.730 11!1 > 1.730 TO 2.595 I > 2.595 TO 3.463 N.EW JERSEY N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-87

4-128 BAY ANCHOVY PROLARVAE (1-3 MM)

OCT. 15-17, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO OJ45

~ > OJ45 TO 0.290 11!1 :> 0.290 TO 0.435 II > 0.435 TO 0.583 NEW JERSEY N

i DELAWARE ATLANTIC OCEAN 1

' PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Mean density (number/lOOmj) of bay anchovy prolarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

I Figure 4-88 I

1

4-129 BAY ANCHOVY PROLARVAE (1-3 MM)

APR 29 - MAY 2, 1980 DELAWARE RIVER ESTUARY, rkin 0-1!7 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.110

~ > 0.110 TO 0.220 1111 > 0.220 TO 0.330 I > 0.330 TO 0.440 NEW JERSEY

• N

'I NOT SAMPLED DELAWARE

. 3 Mean density (number/lOOm ) of bay. anchovy prolarvae, based on 0.5-m plankton net PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-89 I

4-130 BAY ANCHOVY PROLARVAE (1-3 MM)

MAY 5-7, 1980 DELAWARE RIVER ESTUARY, rknl 0-1!7 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.080

~ > 0.080 TO 0.160

!!II > 0.160 TO 0.240 I > 0.240 TO 0.320 NEW JERSEY N

i DELAWARE ATLA.i"'ITIC OCEAN 1

1 3

Mean density (number/lOOm ) of bay anchovy J

• I PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-90 1

4-131 BAY ANCHOVY PROLARVAE (1-3 MM)

MAY 19-22, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 l2l > 0.00 TO 227.75

~ > 227.75 TO 455.50 ll!I > 455.50 TO 683.25 II > 68325 TO 911.00 N

i DELAWARE

[

I I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Mean density (number/lOOm ) of bay anchovy pro larvae, based on 0. 5-m plankton net sampling, Delaware River Estuary.

Figure 4-91 I

I

4-132 BAY ANCHOVY PROLARVAE (1-3 MM)

JUN. 2-6, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 1aa CUBIC METERS D a.a 0 > a.a TO 388.a fN > 388.0 TO 776.0

~ > 776.0 TO 1164.0 I > 1164.0 TO 1552.a i

N DELAWARE i

I I

3 Mean density (number/lOOm ) of bay anchovy I

• 1 PUBLIC SERVICE ELECTRIC AND GAS COMPA.'iY prolarvae, based on 0.5-m plankton net SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-92 I

4-133

• BAY ANCHOVY PROLARVAE (1-3 MM)

JUN. 9-12, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.o 0 > 0.0 TO 353.0

~ > :353.0 TO 706.0 Im > 706.0 TO 1059.0

!ll > 1059.0 TO 1412.0 N

I I

DELAWARE

[,

j I

I I

3 Mean density (number/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY prolarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

Figure 4-93 I

I

4-134 BAY ANCHOVY PROLARVAE (1-3 MM)

JUN. 16-20, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENS I TY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 101.95

~ > 101.95 TO 203.90 11!1 > 203.90 TO 305.85 I > 305.85 TO 407.80 N

t DELAWARE I

. ~

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY prolarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

I Figure 4-94 I

I

4-135

• BAY ANCHOVY PROLARVAE (1~3 MM)

JUL. 7-11, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 o.o 0 > 0.0 TO 582.5 lil > 582.5 TO 1165.0 00 > 1165.0 TO f747.5 Ill > 00.5 TO 2330.0

• .N I

DELAWARE I

I 3

Mean density (number/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net 1* SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-95 .

I J

4-136 BAY ANCHOVY PROLARVAE (1-3 _MM)

JUL. 14-18,

• 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.o 0 > 0.0 TO 798.0

~ > 798.0 TO 1596.0 11!1 > 1596.0 TO 2394.0 I > 23&4.0 TO 3192.2 N

I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-96 I

4-137

• BAY ANCHOVY PROLARVAE (1-3 MM)

JUL. 21-24, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 1aa CUBIC METERS 0 0.0 121 > a.a TO 855.o

~ > 855.0 TO 1710.0 a!! > 1710.0 TO 2565.0 I > 2565.0 TO 3420.0

• N

'I DEL.AWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.."n'. prolarvae, based on 0.5-m plankton net SALEM 316(b) STtJDY sampling, Delaware River Estuary.

Figure 4-97 I

I

_J

4-138 BAY ANCHOVY PROLARVAE (1-3 MM)

AUG. 4-7, 1980 DELAWARE RIVER ESTUARY, rkni 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > 0.0 TO 353.0

~ > 353.0 TO 706.0 DD > 706.0 TO 1059.0 I > 1059.0 TO 1412.2 i

N I

DELAWARE

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY pro larvae, based on 0. 5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-98

4-139 BAY ANCHOVY PROLARVAE (1-3 MM)

AUG. 18-23, 1980 DELAWARE RIVER ESTUARY, rklll 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 l2l > 0.000 TO 17.505-

~ > 17.505 TO 35.010 DD > 35.010 TO 52.515 I > 5?,.515 TO 70.020 N

I DELAWARE I

I I

3 PUBLIC SERVICE ELECTRIC AND GAS COMPANY Mean density (number/lOOm ) of bay anchovy prolarvae, based on 0.5-m plankton net 1* SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

_Figure 4-99 I

4-140 BAY ANCHOVY PROLARVAE (1-3 MM)

SEP. 8-12, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEJ.'ID DENSITY PER 100 CUBIC METERS D 0.000 l2l > 0.000 TO 0.535

~ > 0.535 TO 1.070 D!I > 1.070 TO 1.605 I > 1.605 TO 2140 NEW JERSEY i

N DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 3l6(b) STUDY samnlin2. Delaware River Estuary.

Figure 4-100

4-141 BAY ANCHOVY PROLARVAE (1-3 MM)

SEP. 22-29, 19.80 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.210

~ > 0.210 TO 0.420 Ill > 0.420 TO. 0.630 I > 0.630 TO 0.840 NEW' JERSEY N

'I DELAWARE ATLA.l~TIC OCEAN Mean density (nmnber/lOOmj) of: ba:y anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) SIIJDY sampling, Delaware River Estuary.

Figure 4-101

4-142 BAY ANCHOVY PROLARVAE (1-3 MM)

MAY 18-22, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 12.190

~ > 12.190 TO 24.380 II > 24.380 TO 36.570 I > 36.570 TO 48.760 N

t DELAWARE I

ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-102

4-143 BAY ANCHOVY PROLARVAE (1-3 MM)

MAY 26-28, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 0.305

~ > 0.305 TO 0.610 an > 0.610 TO 0.915 I > 0.915 TO 1.220 NEW JERSEY N

i DELAWARE ATLANTIC OCEAN 3

Mean de~sity (number/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY pro larvae' based on 0. 5-m plankton net sampling, Delaware River Estuary.

Figure 4-103

4-144 BAY ANCHOVY PROLARVAE (1-3 MM)

JUN. 8-11, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS

[1 0.00 121 > o.oo TO 31.10

~ > 3110 TO 62.20 Ill > 62.20 TO 93.30 I > 93.30 TO 124.40 NEW JERSEY N

'I DELAWARE ATLANTIC OCEAN

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMP.A..~ prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-104

4-145 BAY ANCHOVY PROLARVAE (1-3 MM)

JUN. 15-18, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 66.90

~ > 66.90 TO 133.80 11!1 > 133.80 TO 200.70 I > 200.70 TO 267.60 N

i DELAWARE 3

~ean density (number/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 3l6(b) STUDY prolarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

Figure 4-105 l

l

4-146 BAY ANCHOVY PROLARVAE (1-3 MM)

JUN. 22-26, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS (1 0.0 121 > 0.0 TO 651.5

~ > 651.5 TO 1303.0 all > 1303.0 TO 1954.5 I > 1954.5 TIJ 2606.2 N

DELAWARE 3

Mean density (nmnber/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY prolarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

I Figure 4-106 I

J

4-147 BAY ANCHOVY PROLARVAE (1-3 MM)

JUL. 6-10, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 184.20

~ > 18420 TO 368.40 ll!I > 368.40 TO 552.60 II > 552.60 TO 736.80 N

i DELAWARE Mean density (nlllllber/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0. 5-m plankton net 1*

SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-107 l

4-148 BAY ANCHOVY PROLARVAE (1-3 MM)

JUL. 13-17, 1981 DELAWARE RIVER ESTUARY, rkm 0--117 LEGEND DENSITY PER 100 CUBIC METERS n 0.00 0 > 0.00 TO 101.95 ti} > 101.95 TO 203.90 DD > 203.90 TO 305.85 Ill > 305.85 TO 407.80 N

'I

• DELAWARE 3

Mean density (number/100m ) of bay anchovy I

PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-108 I

I

4-149 BAY ANCHOVY PROLARVAE (1-3 MM)

JUL. 20-24, 1981 DELAWARE RIVER ESTUARY. rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 183.75

~ > 183.75 To 367.50 llll > 367.50 TO 55125 II > 55125 TO 735.03 N

t DELAWARE 3

Mean density (number/100m )*of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on o.s-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

• Figure 4-109

4-150 BAY ANCHOVY PROLARVAE (1-3 MM)

AUG. 3-6, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS Q 0.00 0 > 0.00 TO 172.55

~ > 172.55 TO 345.10 Dll > 345.10 TO 517.65 I > 517.65 TO 690.20 N

i DELAWARE 3

PUBLIC SERVICE ELECTRIC AND GAS COMPANY Mean density (number/100m ) of bay anchovy prolarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

I SALEM 316(b) STUDY Figure 4-110 J

I

4-151

• BAY ANCHOVY PROLARVAE (1-3 MM)

AUG. 17-22, 1981 DELAWARE RIVER ESTUARY, rkni 0~117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 10.280 lit} > 10.280 TO 20.560 II > 20.560 TO 30.840 I > 30.840 TO 41.120 NEW JERSEY N

i

!///!ff;

/111 I;!

I I I

/if/f:Z11 DELAWARE v/fl'fffj ff/f/!11

1111;111

/1!f!f1/f!

1;1 1 1

/jII1 ATLANTIC 1

!;fzl OCEAN I

' 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-.111

4-152 BAY ANCHOVY PROLARVAE (1-3 MM)

AUG. 31 - SEP. 3, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS

[] 0.000 0 > 0.000 TO 1.070

~ > 1.070 TO 2.140 9 > 2.140 TO 3.210 I > 3.210 TO 4.280 NEW JERSEY t

N

. DELAWARE ATLANTIC OCEAN

• J 3

Mean density (nmnber/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 3l6(b) STUDY prolarvae, based on 0.5-m plankton ~et sampling, Delaware River Estuary.

I Figure 4-112 J

I

4-153 BAY ANCHOVY PROLARVAE (1-3 MM)

SEP. 28-30, 1981 DELAWARE RIVER ESTUARY, rkzn 0-117 LEGEND DENSITY PER 100 CUBIC METERS n 0.000 121 > 0.000 TO 0.680

~ > 0.680 TO 1.350 s > 1360 TO 2.040 I > 2.040 TO 2.720 NEW JERSEY N

i DELAWARE

[ _

ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.'i! prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-113

4-154 BAY ANCHOVY PROLARVAE (1-3 MM)

MAY 11-14, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 1.180

~ > 1.180 TO 2.360 11!1 > 2.360 TO 3.540 I > 3.540 TO 4.720 NEW.JERSEY t

N

• xlf *

.fA

. x{;*{;lXl Xxf.xX DELAWARE f; I ff/ff//!

f.zfifzl ATLANTIC OCE.A.i~

111,l I

I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-114 3

Mean density (number/100m ) of bay anchovy prolarvae, based on 0.5-m plankton net

.II J

4-155 BAY ANCHOVY PROLARVAE (1-3 MM)

MAY 17-21, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 173.80 tiil > 173.80 TO 347.60 e > 347.60 TO 521.40 B > 521.40 TO 695.23 N

t DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

SALEM 316(b) STUDY Figure 4-115 t

I

4-156 BAY ANCHOVY PROLARVAE (1-3 MM)

MAY 24-27, 1982 DELAWARE RIVER ESTUARY, rktn 0~117 LEGEND DENSITY PER 100 CUBIC METERS 0 o.o 121 > 0.0 TO 273.5

~ > 273.5 TO 54'1.0 ISi > 547.0 TO 820.5

• > 820.5 TO 1094.0 N

i DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.~ prolarvae, based on 0.5-m plankton net SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-116

4-157

• BAY ANCHOVY PROLARVAE (1-3 MM)

JUN. 7-10, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS

[l 0.00 121 > 0.00 TO 32.10

~ > 32.10 TO 64.20 Ill > 64.20 TO 96.30 Iii > 96.30 TO 128.40 N

t DELAWARE Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY pro larvae' based on 0. 5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-117

(

l

4-158 BAY ANCHOVY PROLARVAE (1-3 MM)

JUN. 21-24, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 o.o 121 > o.o TO 784.5

~ > 784.5 TO 1569.0 l!U > 1569.0 TO 2353.5 I > 2353.5 TO 3138.0 N

i DELAWARE I

l PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY 3

Mean density (number/lOOm ) of bay anchovy prolarvae,_ based on 0.5-m plankton net sampling, Delaware River Estuary.

Figure 4-118

.lI I

4-159

• BAY ANCHOVY PROLARVAE (1-3 MM)

JUN. 28 - JUL. 3, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 o.oo 0 > 0.00 TO 187.50

~ > 187.50 TO 375.00 Dll > 375.00 TO 562.50 ti > 562.50 TO 750.00 N

i DELAWARE I

. 3 Mean density (number/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

F~gure 4-119 I

I

4-160 BAY ANCHOVY PROLARVAE (1-3 MM)

JUL. 12-15, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS Q 0.0 121 > 0.0 TO 451.5

~ > 451.5 TO 903.0 11!1 > 903.0 TO 1354.5 I > 1354.5 TO 1806.0 N

i DELAWARE J

3 Mean density (number/100m ) of bay anchovy J

PUBLIC SERVICE ELECTRIC AND GAS COMPANY _ pro larvae, based on 0. 5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-120 1

1

4-161 BAY ANCHOVY PROLARVAE (1-3, MM)

JUL. 19-23, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS I] 0.00 0 > 0.00 TO 204.80

~ > 204.80 TO 409.60 1111 > 409.60 TO 614.40 I > 614.40 TO 819.20 N

t DELAWARE I

3 Mean density (number/lOOm ) of.bay anchovy PU!LIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-121

4-162 BAY ANCHOVY. PROLARVAE (1-3 MM)

JUL. 26-29, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 17.270 s > 17.270 TO 34.540 llD > 34.540 TO 51.810 II > 51.810 TO 69.080 i

N DELAWARE I

J I

.)

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY pro1arvae,.based on 0.5-m plankton net sampling, Delaware River Estuary.

I Figure 4-122 I

I

4-163 BAY ANCHOVY PROLARVAE (1-3 MM)

AUG. 9-13, 1982 DELAWARE RIVER ESTUARY, rk:m 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 29.05

~ > W.05 TO 5810 1111 > 58.10 TO 8715 l!I > 87.15 TO 116.20 N

t DELAWARE I

l 3 Mean density (number/lOOm ) o:J: bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA."iY prolarvae, based on 0.5-m plankton net J SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-123 l

I I_

4-164 BAY ANCHOVY PROLARVAE (1-3 MM)

AUG. 23-27, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.ooo 0 > 0.000 TO 11.635

~ > 11.635 TO 23.270 11!1 > 23.270 TO 34.905 I > 34.905 TO 46.541 N

DELAWARE

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-124

4-165 BAY ANCHOVY PROLARVAE (1-3 MM)

AUG. 30 - SEP. 2, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO ll.700 ril > 11.700 TO 23.400 U!I > 23.400 TO 35.100 II > 35.100 TO 46.800 NEW JERSEY N

I  !

I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SER.VICE ELECTRIC AND GAS COMPANY pro larvae, based on 0. 5-m plankton net l

SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-125

4-166 BAY ANCHOVY PROLARVAE (1-3 MM)

SEP. 20-24, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO -1.685

~ > 1685 TO 3.370 Im > 3.370 TO 5.055 I > 5.055 TO 6.740 NEW JERSEY A

N I

DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-126 I

I

---~- -~---- ---------------------------

rn

~ BAY ANCHOVY PRO LARVAE 1979 f:i;:l E-4 800 f:i;:l

~ 750 u

1-t 700 l:Q 650 0

u 600 0 550 0

500

~

f:i;:l 450 11..

400 ~

~ I f:i;:l 350 ......

l:Q O'I

...J

~ 300 z

....__, 250

>--< 200 E-4 1-t 150 rn z

f:i;:l 100 r:::i 50 z

f:i;:l JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

~

Mean density and 95% c.r. of bay anchovy prolarvae taken by 0.5-m

, PUBLIC SERVICE ELECTRIC A!ID GAS COMPANY plankton net in the Delaware River Estuary - 1979.

SALEM 316(b) STUDY Figure 4-127

{/)

~ BAY ANCHOVY PROLARVAE - 1980 Pi! BOO E-t Pi!

~ 750 u 700 1-1 p:i 650

~

u 600 0 550 0

500

~

Pi! 450

~

400

~

r:iJ 350 p:i

~ 300 z

250

~ 200 E-t 1-1 150

{/)

zPi! 100 A 50 z 0 r:iJ JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

~

Mean density and 95% C.I. of bay anchovy prolarvae taken by 0.5-m PUBLIC SERVICE ELECTRIC AND GAS COMPANY plankton net in the Delaware River Estuary - 1980.

SALEM 316(b) STUDY Figure 4-128

(/)

~

BAY ANCHOVY PROLARVAE - 1981 r:c.:l

[-I 800 r:c.:l

~ 750 u

1-l 700 i:Q 650

~

u 600 0 550 0

.-I 500

~

r:c.:l 450 P-i 400

~

r:c.:l 350 m

~ 300 z

...._,, 250

>-< 200 f-i 1-l 150

(/)

z r:c.:l 100 0 50 z

-Cl! JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

µ:i

~

Mean density and 95% c. I. of bay anchovy prolarvae taken by 0.5-m PUBLIC SERVICE ELECTRIC AND GAS COMPANY plankton net in the Delaware River Estuary - 1981.

SALEM 316(b) STUDY Figure 4-129

if)

~ BAY ANCHOVY PROLARVAE - 1982 J".J::l E-1 800 J".J::l

a 750 u 700 1-i m 650 0

u 600 0 550 0

T""I 500

~

J".J::l 450 11..

400

~ ~

J".J::l I 350 I-'

m -..J

a 300 0 0

z 250

>-t 200 E-1 1-i 150 if) z 100 J".J::l 0 50 z 0

<!! JAN SEP OCT J".J::l FEB MAR APR MAY JUN JUL AUG NOV DEC

a Mean density and 95% C.I. of bay an~hovy prolarvae taken by 0.5-m PUBLIC SERVICE ELECTRIC AND GAS COMPANY plankton net in the Delaware River Estuary - 1982.

SALEM 316(b) STUDY Figure 4-130

4-171

• 1500 BAY ANCHOVY PRO LARVAE rkm 113-117 1979 0 I 1500 rkm 97-113 en

~

~ 0

~

~ 1500

~ rkm 80-97 u

1-1 m 0-u 1500 0 rkm 64-80 0

....-i

~

~ 0-P-i 1500

~ rkm 48-64

~

m

~

0 0 z

1500

>i rkm 32-48 E-i 1-1 en z

r::::i 0

Q 1500 z rkm 16-32 r::::i

s 0 I I*

rkm 0-16 150:1 I I I I ~b .e.,.e.~,& I h 4 I JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY tows, Delaware River Estuary - 1979.

Figure 4-131

4-172 BAY ANCHOVY PROLARVAE - 1980 1500 rkm 113-117 0-1500 rkm 97-113 en

~

f:il 0 E-t f:il 1500

~ rkm 80-97 u

1--t m 0

!::J u 1500 0 rkm 64-80 0

~

t:=:l 0 P--t 1500

~ rkm 48-64 t:=:l m

~

!::J 0-z 1500

~ rkm 32-48 E-t 1--t en z 0 f:il 0 1500 z rkm 16-32 r:r.:I

~

0 1500 rkm 0-16 JAl"\f FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy

. PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY tows, Delaware River Estuary - 1980.

Figure 4-132

4-173 BAY ANCHOVY PROLARVAE 1981 1500 rkm 113-117 0

1500 rkm 97-113 r:n

~

ril 0 E-i ril 1500

2! rkm 80-97 u

I ll 0 0 u 1500 0 rkm 64-80 0

~

ril 0-P-t 1500

~ rkm 48-64 r=:l Ill

2!

0 0-z

...._ 1500

~ rkm 32-48 E-i r:n z 0-ril

~ 1500 rkm 16-32 z

ril

~

0 1500 rkm 0-16 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY prolarvae, based on 0.5-m plankton net SALEM 316(b) STUDY tows, Delaware River Estuary - 1981

• Figure 4-133 I

I

4-174 BAY ANCHOVY PROLARVAE - 1982 1500 rkm 113-117 0

1500 rkm 97-113 en.

~

f£I 0 E-<

f£I 1500

21 rkm 80-97 u

1-1 m 0

J u 1500 0 rkm 64-80 fL,.

0

~

f£I 0 AAA j

• Ai!< A jA :A 11..

1500

~ rkm 48-64

• f£I m

~

J 0 z

'._/

1500

>i rkm 32-48 E-<

1-1 en.

z f£I 0-0 1500 z rkm 16-32 f£I

~

0 1500 rkm 0-16 0 I JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Regional mean density of bay anchovy prolarvae, based on 0.5-m plankton net tows, Delaware River Estuary - 1982.

Figure 4-134

.II

4-175 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

MAY 22-24, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.00 0 > 0.00 TO 107.70

~ > 107.70 TO 215.40 11!1 > 215.40 TO 323.10 I > 323.10 TO 430.80 N

t DELAWARE I

~ 3 Mean density (number/100m ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY postlarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

Figure 4-135 I

I

4-176 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

MAY 29 - JUN,. 1, 1979 DELAWARE RIVER ESTUARY, rklll 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 60.55

~ > 60.55 TO 1~1.10 DI! > 12UO TO 181.65 I > 181.65 TO 24223 i

N DELAWARE I

PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 3l6(b) STUDY 3

Mean density (number/lOOm ) of bay anchovy postlarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

Figure 4-136

.II I

4-177

• BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUN. 5-7, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERs IJ 0.00 0 > 0.00 TO 31.20 t:lJ > 31.20 TO 62.40 9 > 62.40 TO 93.60 II > 93.60 TO 124.80 NEW JERSEY N

i DELAWARE I

3

' PUBLIC SERVICE ELECTRIC AND GAS COMPANY Mean density (number/100m ) of bay anchovy postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-137 I

I

4-178 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUN. 12-14, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > 0.0 TO 285.5

\~ > 285.5 TO 571.0

!ID > 57l0 TO 856.5 I > 856.5 TO 1142.0 I

N t

• 1 DELAWARE I

ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy I

PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-138 I

I

4-179

• BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUN. 25-29, 1979 DELAWARE RIVER ESTUARY, rkni 0-117 LEGEND DENSITY PER 100 CUBIC METERS Q o.o 0 > 0.0 TO 257.5

~ > 257.5 TO 515.0 Im > 515.0 TO 772.5 I > 772.5 TO 1030.0 N

i DELAWARE 3

Mean density (ntnnber/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0. 5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary

• Figure 4-139

4-180 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUL. 9-12, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS Q 0.0 0 > 0.0 TO 277.0

~ > 277.0 TO 554.0 DI! > 554.0 TO 8310 II > 8310 TO 1108.0 i

N DELAWARE 3

Mean density (number/lOOm ) of; bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary *.

Figure 4-140

4-181 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUL. 16-20, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS

[l 0.0

- 121 > 0.0 TO 683.5

~ > 683.5 TO 1367.0 Oii > 1367.0 TO 2050.5 I > 2050.5 TO 2734.0

• i N

DELAWARE I

I 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net

• SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-141

4-182

...---------------* BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUL. 24-27, 1979 DELAWARE RIVER *ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS

[l 0.0 0 > 10.0 TO 473.5

~ > 473.5 TO 937.0 11!1 > 937.0 TO 1400.5 I > 1400.5 TO 1864.3 i

N DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-142

4-183 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

AUG. 6-9, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 l2l > 0.0 TO 323.5

~ > 323.5 TO 647.0 Ull > 647.0 TO 970.5 II > '970.5 TO 1294.0 N

'I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net

• SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-143

4-184 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

AUG. 20-24, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 22.050

~ > 22.050 TO 44.100 DD > 44.100 TO 66.150 I > 66.150 TO 88.200 NEW JERSEY N

i

• DELAWARE 3

Mean density (number/lOOm ) of bay anchovy I

PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae' based on 0 *.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-144 I

I

4-185 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

SEP. 10-13, 1979 DELAWARE RIVER.ESTUARY, rklll 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.ooo Ill > 0.000 TO 3.470 ril > 3.470 TO 6.940 D!1 > 6.940 TO 10.410 I > 10.410 TO 13.884 NEW JERSEY N

t DELAWARE I

3 Mean density (nwuber/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.'fi' postlarvae, based on 0.5-m plankton net SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-145 I

I

4-186 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

OCT. 15-17, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS a 0.000 0 > 0.000 TO 1.110

~ > 1.110 TO 2.220 DI > 2.220 TO 3.330 I > 3.330 TO 4.443 NEW JERSEY N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STlJDY sampling, Delaware River Estuary.

Figure 4-146 I

I

4-187

• BAY ANCHOVY POSTLARVAE (3.1-20. MM)

OCT. 29 - NOV. 2, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS

[] 0.000 121 > 0.000 TO 0285

~ > 0.285 TO 0.570 al > 0.570 TO 0.855 I > 0.855 TO 1.142 NEW JERSEY N

i DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-147

4-188 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

APR. 29 - MAY 2, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO Q:l.15

~ > 0115 TO 0230 1l!I > 0.230 TO 0.345 m > 0.345 TO 0.460 NEW JERSEY N

t DEL.AWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-148

4-189 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

MAY 19-22, 1980 DELAWARE RIVER ESTUARY, rklll 0-1!7 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 123.55 IN > 123.55 TO 247.10 1111 > 247.10 TO 370.65 I > 370.65 TO 494.20 N

t DELAWARE I 3 Mean density (number/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY postlarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

Figure 4-149 I

I

4-190 BAY ANCHOVY POSTLARVAE (3J-20 MM)

JUN. 2-6, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > 0.0 TO 359.5

~ > 359.5 TO 719.0 ll!l > 719.0 TO 1078.5 I > 1078.5 TO 1438.0 N

t DELAWARE I

1 j

PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Mean density (number/lOOm ) of bay anchovy postlarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

I Figure 4-150 I

I

4-191

• BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUN. 9-12, 1980 DELAWARE RIVER .ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 148.55

~ > 148.55 TO 297.10 DD > 297.10 TO 445.65 II > 445.65 TO . 594.21 NEW JERSEY N

A I

DELAWARE

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-151 I

4-192 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUN. 16-20, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.00 121 > 0.00 TO 152.80

~ > 152.80 TO 305.60 ll!I > 305.60 TO 458.40 I > 458.40 TO 611.20 N

t

• DELAWARE 3

Mean density (nl.llilber/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STlJDY sampling, Delaware River Estuary.

Figure 4-152

4-193

• BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUL. 7-11, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 0 > 0.0 TO 764.5

~ > 764.5 TO 1529.0 D!l > 1529.0 TO 2293.5 11!1 > 2293.5 TO 3058.0 N

A I

DELAWARE I

I 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.'lY postlarvae, based on 0.5-m plankton net I

SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-153 I

4-194 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUL. 14-18, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > 0.0 TO 695.0

~ > 695.0 TO 1390.0 D!I > 1390.0 TO 2085.0 I > 2085.0 TO 2780.0 N

t DELAWARE

. j Mean density (number/lOOm ) of bay anchovy postlarvae, baied on o.s~m plankton net PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-154

4-195

• BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUL. 21-24, 1980 DELAWARE RIVER ESTUARY, rkm 0-1f7 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 0 > 0.0 TO 1522.5

~ > 1522.5 TO 3045.0 s* > 3045.0 TO 4567.5 I > 4567.5 TO 6090.3 N

i DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-155

4-196 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

AUG. 4-7, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENS I TY PER 100 CUBIC METERS 0 0.0 0 > 0.0 TO 424.5

~ > 424.5 TO 849.0 D!I > 849.0 TO 1273.5 I > 1273.5 TO 1698.0 N

t DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-156 1

4-197 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

AUG. 18-23, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 -> o.ooo TO 20.750

~ > 20.750 TO 41.500 DD > 41.500 TO 62.250 I > 62.250 TO 83.000 N

t

. I 3

Mean density (number/100m ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY postlarvae' based on 0. 5-m plankton net sampling, Delaware River Estuary.

Figure 4-157 I

4-198 BAY ANCHOVX POSTLARVAE (3.1-,---20 MM)

SEP. 8-12, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 12J > 0.000 TO 4.835 ril > 4.835 TO 9.670

!Bl > 9.670 TO 14.505 11 > 14.505 TO 19.340 NEW JERSEY N

I DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) o~*bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STIJDY sampling, Delaware River Estuary.

Figure 4-158

4-199

• BAY ANCHOVY POSTLARVAE (3.1-20 MM)

SEP. 22-29, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 8.350 r;il > 8.350 TO 16.70()

Iii > 16.700 TO 25.05.0 D > 25.050 TO 33.400 NEW JERSEY N

i DELAWARE I

' PUBLIC SERVICE ELECTRIC AND GAS COMP.ANY 3

Mean density (number/lOOm ) of bay anchovy

• postlarvae, based on 0.5-m plankton net I

SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-159 I

4-200 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

OCT. 6-10, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.ooo 0 > 0.000 TO 0.900

~ > 0.900 TO 1.800 Ill > 1.800 TO 2.700 11 > 2.700 TO 3.602 NEW JERSEY N

i

• DELAWARE PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Mean density (number/lOOmJ) of bay anchovy postlarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

I Figure 4-160 I

1

4-201

• BAY ANCHOVY "POSTLARVAE (3.1-20 MM)

OCT. 20-27, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 4180

~ > 4180 TO 8.360 au > 8.360 TO 12.540 II > 12.540 TO 16.720 NEW JERSEY

• N A

I DELAWARE A'ILA.NTIC OCEAN I.

3 Mean density (number/100m ) of bay anchovy

[ PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY postlarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

Figure 4-161

[

I

4-202 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

NOV. 3-7, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 0230

~ > 0.230 TO 0.460

!JD > 0.460 TO 0.690 I > 0.690 TO 0.921 NEW JERSEY N

A I

DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-162

4-203 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

MAY 18-22, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENS I TY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 2.340

~ > 2.340 TO 4.680 all > 4.680 TO 7.020 I > 7.020 TO 9.360 NEW JERSEY N

i DELAWARE ATLANTIC OCEAN 3

Mean density (nlllllber/lOOm ) of bay anchovy l **

PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-163 I

4-204 BAY ANCHOVY POSTLARVAE * (3.1-20 MM)

MAY 26-28, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.120

~ > 0.120 TO 0.240 s > 0.240 TO 0.360 I > 0.360 TO 0.480 NEW JERSEY*

N i

DELAWARE ATLANTIC OCEAN I

.l 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-164 1

I

. 4,...205 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUN. 8-11, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 9.925

~ > 9.925 TO 19.850 ll!I > 19.850 TO 29.775 I > 29.775 TO 39.700 NEW JERSEY

• N I

DELAWARE ATLAt~TIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA..'fi postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-165

4-206 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUN. 15-18, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.00 121 > 0.00 TO 126.15

~ > 126.15 TO 252.30 IHI > 252.30 TO 378.45 l!il > 378.45 TO 504.63 NEW JERSEY N

"I DELAWARE ATLAl"'fTI C OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.."n postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-166

4-207

• BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUN. 22-26, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 121 > 0.0 TO 725.5

~ > 725.5 TO 1451.0 Ill! > 14510 TO 2176.5 I > 2176.5 TO 2902.0

• • N i

DELAWARE 3

Mean density (number/100m ) of bay anchovy postlarvae, based on 0.5-m plankton net PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-167

4-208 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUL. 6-10, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO- 182.55

~ > 182.55 TO 365.10 D!I > 365.10 TO 547.65 II > 547.65 TO 730.20 4

N I

DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS CON:PA.~ postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-168

4-209 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUL. 13-17, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUB! C METERS

• o 0.0 IZI > 0.0 TO 645.0 fi1 > 645.0 TO 1290.0 lD > 1290.0 TO 1935.0 I > 1935.0 TO 2580.0 N

A I

DELAWARE 3

Mean density (number/lOOm ) o,f bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.'ll postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-169

4-210 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUL. 20-24, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > 10.0* TO 625.0

~ > 625.0 TO 1240.0

!!!I > 1240.0 TO 1855.0 II > 1855.0 TO 2470.0 N

i DELAWARE I

I

.I 3

Mean density (number/lOOm ) o~ bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY postlarvae, based on 0.5-m plankton net sampling, Delaware River Estuary.

I Figure 4-170

4-211 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

AUG. 3-6, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.00 121 > 20.00 TO 260.75

~ > 260.75 TO 501.50

!ID > 501.50 TO 742.25 II > 742.25 TO 983.01 N

I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC A..'ID GAS COMPA..'rl postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-171

4-212 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

AUG. 17-22, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 24-6.40

~ > 246.40 TO 492.80 IE > 492.80 TO 739.20 R > 739.20 TO 985.60 A

I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0. 5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-172

4-213 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

AUG. 31 - SEP. 3, 1981 DELAWARE RIVER ESTUARY, rkrn. 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 20.165

~ > 20165 TO 40.330 DD > 40.330 TO 60.495 Ill > 60.495 TO 80.660 N

I DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA..'N postlarvae, based on 0.5-m plankton net

• SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-173

4-214 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

SEP. 14-18, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 21.845

~ > 21.845 TO 43.690 lB > 43.690 TO 65.535 I > 65.535 TO 87.380 N

t DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-174 J

4-215

• BAY ANCHOVY POSTLARVAE (3.1-20 MM)

SEP. 28-30, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEl"ID DENSITY PER 100 CUBIC METERS D 0.000 l2l > 0.000 TO 4.175

~ > 4.175 TO 8.350 IF.I > 8.350 TO 12.525 I > 12.525 TO 16.700 N

A I

DELAWARE ATLA.i'iTI C OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND CAS COMPA.'{Y postlarvae, based on 0.5-m plankton net

• SALEM 316(b) STUDY sampling, Delaware RivE:!r Estuary.

Figure 4-175

4-216 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

OCT. 12-15, 1981 DELAWARE RIVER ESTUARY, rk:rn 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 ,

0 > 0.000 TO 1.640

~ > 1.640 TO 3.280 l!!l > 3.280 TO 4.920 I > 4.920 TO 6.560 N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-176

4-217

• BAY ANCHOVY POSTLARVAE (3.1-20 MM)

MAY 17-21, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 35.45

~ > 35.45 TO 70.90

~ > 70.90 TO 106.35 I > 106.35 TO 141.80

• t N

DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net

• SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-177

4-218 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

MAY 24-27, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.0 0 > 0.0 TO 376.5

~ > 378.5 TO 757.0 l!il > 757.0 TO 1135.5 I > 1135.5 TO 1514.0 NKW JERSEY N

i 3

Mean density (number I lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA..'n'. postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-178

4-219

• BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUN. 7-10, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 166.25

~ > 166.25 TO 332.50 IHI > 332.50 TO 498.75 I > 498.75 TO 665.00 N

A I

DELAWARE 3

Mean density (ntnnber/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net

• SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-17 9

4-220 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUN. 21-24, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0

!21 > 0.0 TO 376.0

~ > 376.0 TO 752.0 00 > 752.0 TO 1128.0 II > 1128.0 TO 1504.0 N

i DELAWARE 3

tean density (number/100m ) of bay anchovy ostlarvae, based on 0. 5-m plankton net PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-1'80

4-221

• BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUN. 28 - JUL. 3, 1982 DELAWARE RIVER ESTUARY, rkrn 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 l2l > 0.0 TO 679.0

~ > 679.0 TO 1358.0 .

!!!I > 1358.0 TO 2037.0 Ill > 2037.0 TO 2716.0 N

i DELAWARE Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0. 5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-181

4-222 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUL. 12-15, 1982 DELAWARE RIVER ESTUARY, rkrn 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.0 0 > 0.0 TO 576.0

~ > 576.0 TO 1152.0 IHI > 1152.0 TO 1728.0 I > 1728.0 TO 2304.0 N

i 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-182

4-223 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUL. 19-23, 1982 DELAWARE RIVER ESTUARY, rklll 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.o 0 > 0.0 TO 405.0

~ > 405.0 TO 810.0

~ 810.0 TO 1215.0 I > 1215.0 TO 16?.0.0 N

A I

DELAWARE Mean dens~t; (number/~00m3 ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0. 5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-183

4-224 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

JUL. 26-29, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.00 0 > 0.00 TO 9155-

~ > 91.55 TO 183.10

"!Ill > 183.10 TO 274.65 I > 274.65 TO 366.21 N

t DELAWARE j

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-184

4-225

• BAY ANCHOVY POSTLARVAE (3.1-20 MM)

AUG. 9-13, 1982 DELAWARE RIVER ESTUARY, rkin 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.00 0 > 0.00 TO 52.20

~ > 52.20 TO 104.40 l!D > 104.40 TO 156.60 I > 156.60 TO 208.80

• N t

DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEH 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-185

4-226 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

AUG. 23-27, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.00 121 > 0.00 TO 39.30

~ > 39.30 TO 78.60

!Bl > 78.60 TO 117.90

!!ii > 117.90 TO 157.20 N

A I

DELAWARE 3

Mean density (number/ lOOrn ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STlJDY sampling, Delaware River Estuary.

Figure 4-186

4-227

• " BAY ANCHOVY POSTLARVAE (3.1-20 MM)

AUG. 30 - SEP. 2, 1982 DELAWARE RIVER ESTUARY, rkin 0-117 LEGE.l'iD DE.t~SITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 45.40

~ > 45.40 TO 90.80 IHI > 90.80 TO 136.20 6 > 136.20 TO 181.60

• i N

DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC A?."Il GAS CONPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-18/

4-228 BAY ANCHOVY POSTLARVAE (3.1-20 MM) .

SEP. 20-24, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 46.45

~ > 46.45 TO 92.90 ll<< > 92.90 TO 139.35 I > 139.35 TO 185.80

.N I

DEL.AW.ARE

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY post larvae, based on 0.5-m plankton net

' SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-188

4-229 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

OCT. 4-5, 198.2 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 l2I > 0.000 TO 5.585

~ > 5.585 TO 11.170 00 > 11170 TO 16.755 I > 16.755 TO 22.340 NEW JERSEY

• ~

I DELAWARE ATLA.L\TTI C OCEAN Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA..'iY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-189

4-230 BAY ANCHOVY POSTLARVAE (3.1-20 MM)

OCT. 18-20, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGE.t'IJD DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 2.625

~ > 2.625 TO 5.250 Dll > 5.250 TO 7.875 I > 7.875 TO 10.500 N

• I

• DELAWARE Mean density (number/lOOmJ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COHPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-190

---

~

if)

~ BAY ANCHOVY POSTLARVAE 1979 r:r:l 1500 E-<

r:r:l

~ 1400

() 1300 1-l m 1200

~

()

1100 0

0 1000 rl

~ 900 r:r:l p_, 800

~ 700 r.:il J::.

m BOO N I

~ w

=:i 500 I-'

z

'-,__/

400

~

E-< 300 1-l if) z r:r:l 200 i=:i 100 z 0

<l! JAN FEB MAR APR MAY JUN JUL AUG SEP OCT r.:il NOV DEC

~

Mean density and 95% c. I. of bay anchovy postlarvae taken by O. 5-m PUBLIC SERVICE ELECTRIC AND GAS COMPANY plankton net in the Delaware River Estuary, 1979.

SALEM 316(b) STUDY Figure 4-191

if)

~ BAY ANCHOVY POSTLARVAE 1980 f.:il 1500 E-t f.:il

~ 1400 u

1-l 1300 m 1200 0

u 1100 0

0 . 1000 p:: 900 p;:J P-i 800 p:: 700

.i::.

I p;:J N m 600 w

~ N 0 500 z

400

. E-t 300 1--t if) zp;:J 200 0 100 z 0- T o I o 0 ,o

<I! JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC f.:il

~

Mean density and 95% c. I. of bay anchovy postlarvae taken by O. 5-m PUBLIC SERVICE ELECTRIC AND GAS COMPANY plankton net in the Delaware River Estuary, 1980.

SALEM 316(b) STUDY Figure 4-192

IJ)

~ '*"\:

BAY ANCHOVY POSTLARVAE - 1981

~

E-t 1500

~

21 1400 u 1300 1-1 v

r:rl 1200

~

u 1100 0

0 1000 T-i

~ 900 r:r:l P.-i 800

~ 700

µ:i r:rl 600 .i::.

• I

21 I

~ rv 500 w z

"-.../

w 4.00 E-t 300 1-1 IJ) z r:r:l 200

~ 100 z 0-

~

r:r:l JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

~

Mean density and 95% c. I. of bay anchovy postlarvae taken by O. 5-m PUBLIC SERVICE ELECTRIC AND GAS COMPANY plankton net in the Delaware River Estuary, 1981.

SALEM 316(b) STUDY Figure 4-193

(/)

~ BAY ANCHOVY POSTLARVAE - 1982 p;:j f-l 1500 p;:j

~ 1400 u

~

1300 p::i

J 1200 u 1100 0

0 1000 M

~ 900 l":t'.l

~ 800

,j:::.

~ '700 I p;:j N p::i w 600 ,j:::.

~

J z

500 400 f-l 300

~

(/)

z p;:j 200 i::i 100 z

-ct: JAN FEB p;:j MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

~

Mean density and 95% c. I. of bay anchovy postlarvae taken by O. 5-m PUBLIC SERVICE ELECTRIC AUD GAS COMPANY plankton net in the Delaware River Estuary, 1982.

SALEM 316(b) STUDY Figure 4-194

4-235 BAY ANCHOVY POSTLARVAE - 1979 2000 rkm 113-117 0-2000 rkm 97-113 en

~

~ 0-E-< -

~ 2000

~ rkm 80-97 0

!:Q

> 0 0 2000 0 rkm 64-80 0

~

P::l 0 iii. 2000

• ~

r=:i c::o

~

z

>-i 2000 0

rkm 48-64 rkm 32-48 E-<

en z 0

~

0 2000 z rkm 16-32 r=:i

21 0 2000 rkm 0-16 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY tows, Delaware River Estuary - 1979.

Figure 4-195

4-236 BAY ANCHOVY POSTLARVAE - 1980 200001j rkm 113~117

_._~-r-~-r-1-,A,A-r-1--Ab--A4*A-AA-~~A-A--A-A-,-J~AAb.,__~~IAO.--A,..__,J_A..._b,.._._,JA..._h,.._..,JA..._~~~

2000 rkm 9'7-113 en

~

fil 0 E-<

fil 2000

21 rkm 80-97 u

1-j m

> 0  !>1

6 h 1A u 2000 0 rkm 64-80 0

~

fil 0-

~

2000

• ~ rkm 48-64 i:c:i m

~

0 0

. z

...__., 2000

~ rkm 32-48 E-<

1-j r:n zfil 0-Q 2000 z rkrri 16-32 fil

~

0 2000 rkm 0-16 0 I JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy PUBLIC SERVICE ELECTRIC A..."ID GAS COHPA...'<Y postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY tows, Delaware River Estuary ..:. 1980.

Figure 4-196

4-237 BAY ANCHOVY POSTLARVAE - 1981 2000 rkm 113-117 en

=~1 rkm 97-113

~

r=:I 0 f-l

~ 2000

2! rkm 80-97 u

>-4 iil 0

u 2000 0 , ...,.4 A ei 6 --,

0 rkm 64-80 0

~

r=:I 0 0-i 2000

~ rkm 48-64 r=:I iil 6AA1~

g 0 t. ti 200~ i 81 6 z

~ rkm 32-48 f-l

~

en zr=:I 0 0 2000 rkm 16-32 z

r=:I

~ 0-2000 rkm 0-16 Q I JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COHPANY postlarvae, based on 0.5-m plankton net SALEM 316(b) STUDY tows, Delaware River Estuary - 1981.

Figure 4-197 L

4-238 BAY ANCHOVY POSTLARVAE - 1982 2000 rkm 113-117 0

2000 rkm 97-113 cn

~

r:::i 0 E-i r.:i::i 2000

~ rkm 80-97 u

~

cu

~

u 2000 0 t:.t,.A I!::. AA4 hp  !::.

.Ah4 0 rkm 64-80 0

. rl

~

Ap r:::i 0-  !::.

P-t 2000

~ r km-' 4s....:.54

~

i:q

~

~ At 6~1A 6p

~o~l:

flq fl z

rkm 32-48 E-i

~

en zr:::i e.~6 1::.4 "" ,....'

200~1 At  !::.

0 z rkm 16-32 r:::i

~

0-2000 rkm 0-16 JAN FEB MAR APR .MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COHPA.'IT postlarvae, based on 0.5-rn plankton net SALEM 316(b) STUDY tows, Delaware River Estuary - 1982.

Figure 4-198

4-239 BAY ANCHOVY 0+ (SURFACE)

APR 10-12, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.020

~ > 0.020 TO 0.040

!F.J > 0.040 TO 0.060 I > 0.060 TO 0.080 NEW JERSEY N

A I

DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC A..'ID GAS COHPA..'fi o+, based on 4.9-m surface trawl sampling, SALEM 316(b) S!UDY Delaware River Estuary.

Figure 4-199

4-240 BAY ANCHOVY 0+ (SURFACE)

APR. 24-25, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 3.085

~ > 3.085 TO 6.:i.70

~ > 6.170 TO 9.255 I > 9.255 TO 12.310 N

A l

3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC A.'ID GAS COMPANY o+, based on 4.9-m surface trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

.,__ Figure 4-200

~T<iR'¥mev

-~ 1 4-241 BAY ANCHOVY 0+ (SURFACE)

JUN. 18-22, 1979 DELAWARE RIVER ESTUARY, rkITI 0-117 LEGEND DENS I TY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.015

~ > 0.015 TO 0.030 Dll > 0.030 TO 0.045 l!1 > 0.04-5 TO 0.060 NEW JERSEY N

A l

DELAWARE ATLANTIC OCEAN Mean density (number/lOOmj) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m surface trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-201

4-242 BAY ANCHOVY 0+ (SURFACE)

JUL. 2-5, 1979 DELAWARE RIVER ESTUARY, rkITI 0-117 LEGE..t"\ID DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.505

~ > 0.505 TO 1.010

~ > 1.010 TO 1.515 I > 1.515 TO 2.020 N

i DELAWARE L.

ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m surface trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-202 I

4-243 BAY ANCHOVY 0+ (SURFACE)

JUL. 16-20, 1979 DELAWARE RIVER ESTUARY, rklll 0-117 LEGEJi!D DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 1.945

~ > 1945 TO 3.890 nn > 3.890 TO 5.835 Im > 5.835 TO 7.784 N

A I

DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC A.'!D GAS COMPMY o+, based on 4.9-m surface trawl sampling,

• SALEM 316(b) STUDY Delaware River Estuary.

~~

~

Figure 4-203

4-244 BAY ANCHOVY 0+ (SURFACE)

JUL. 31 - AUG. 3, 1979 DELAWARE RIVER ESTUARY, rkm 0-1f7 LEGEND DENS I TY PER 100 CUBIC METERS D 0.00 0 > 0.00 TO 30.95

~ > 30.95 TO 61.90 l!!I 61.90 TO 92.85 I > 92.85 TO 123.80 N

i DELAWARE ATLAi~TIC OCEAN

~

3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m surface trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

~.W'dll1llii Figure 4-204

4-245

• BAY ANCHOVY O+ (SURFACE)

AUG. 13-17, 1979 DELAWARE RIVER ESTUARY, rklll 0-1!7 LEGE.t~D DENS I TY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 17.765

~ > 17.765 TO 35.530 00 > 35.530 TO 53.295 Ill > 53.295 TO 71.060

• N I

DELAWARE L

3 Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY O+, based on 4.9-m surface trawl sampling, SAJ,EM 316(b) STUDY

~~~.bm.&b,1,,,jj:Jl.e.I:~"'J.,.:....t..S,,,,,,J;~~t.Ul.ll'P;l,J,,!,J;;,~.,,,,,~--,.,**m*=*'"""""~

0 Figure 4-205

4-246 BAY ANCHOVY 0+ (SURFACE)

AUG. 27-30, 1979 DELAWARE RIVER ESTUARY, rkill 0-1!7 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 4.350

~ > 4.350 TO 8.700

!lll > 8.700 TO 13.050

!ill > 13.050 TO 17.400 N

A I

DELAWARE

""' ' -"""'""""""".'":'":r:""'"'"""'""2*=

Mean density (number I lOOm ) of bay anchovy o+, based on 4.9-m surface trawl sampling, PUBLIC SERVICE ELECTRIC AND GAS COMPA.."N SALEM. 316 ( b) STUDY Delaware River Estuary.

Figure 4-206

'F"OC77Mtf'IT* '"'O'R'r?F'V'SOS't"J"PI:

4-247 BAY ANCHOVY 0+

JUL. 9-13, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEl"\fD DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.030

~ > 0.030 TO 0.060 00 > 0.060 TO 0.090 fli > 0.090 TO 0.120 NEW JERSEY

• N I

DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COHPA..'iY o+, based on 4.9-m bottom trawl sampling,

• SALEM 316(b) STlTDY Delaware River Estuary.

Figure 4-207

4-248 BAY ANCHOVY 0+

JUL. 24-27, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGE.i'iD DE.i'iSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 1.270

~ > 1270 TO 2.540

~ > 2.540 TO 3.810 ii > 3.810 TO 5.082 NEW JERSEY N

IA I

DELAWARE ATLANTIC OCEAN

~ ....................."""""'°"""---""""'"--""""""'IP""""""""""""'"-=~==-~

Hean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY ....O""'+""',"""""'b""a""'se=d...,,,.,o"n"'

~Delaware River ""'4""""".Estuary.

9.,,,,-,,.,m.,,....bo..,,t=t=o...,m"""""'tr"""a""'w""'l""'"""sa=m-p=l-i...

n""'g""',""""'] . ,

Figure 4-208

4-249

• BAY ANCHOVY 0+

AUG. 6-10, 1979 DELAWARE RIVER ESTUARY, rk1n 0-117 LEGEND DENS I TY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 17.495

~ > 17.495 TO 34.990

~ > 34.990 TO 52.485

~ > 52.485 TO 69.980

• N I

ATLlu'fTiC OCEAN

~"""""""°"=="'""""'"""""""""""""""'.,.....,"""""-=,.,...,........,""""""""""'""""'-'"""'""""""""""'"""""-=u~="""""""'""""",,_,,__....,,,.....,"°"""'..,....._,,,"""""'.......,"""""'""""2!-

3 He an density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTR1C AND GAS COHPANY . 0+, based on 4. 9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-209

4-250 BAY ANCHOVY 0+

AUG. 20-24, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGE.t~D DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 6245 til > 6.245 TO 12.490

~ > 12.490 TO 18.735 I > 18.735 TO 24.980 N

I DELAWARE

,_.,,~,,,..,,.===-"""""'-==--=====>-==-'il""""""""""""""'"""""""""".,,..,....,...,,..,"""""'"""'"=='-~--=-"""""'=="""""~

Mean density (number/lOOm ) of bay anchovy

~

1 PUBLIC SERVICE ELECTRIC A..'ID GAS COMPA.'N SALEM 316(b) STUDY *~Delaware

..,,.,O+""""",""'b""'a""'se"""d"""""o"""n"""4=

River .....Estuary.

9....-"""m""'b""'o=t=t=om-t""'r""'a""'wl"""""s=a=mp""'l"""i'""'n""'g=,*

• Figure 4-210

4-251

• BAY ANCHOVY O+

SEP. 4-5, 1979 DELAWARE RIVER ESTUARY, rklll 0-117 LEGEND DE.i'l"SITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 5.950

~ > 5.950 TO 11.900

!Ill > 11.900 TO 17.850

~ > 17.850 TO 23.800 N

A I

DELAWARE

_.........,....,,,""'""",,,._......,._.~-==-...,_...,..._,.,,"""""'..,,.,,,..,,,,,_""""....,_~~nrn="""""""'"""""'""""'""""'"""""'"""""-=-~~..,_"""""'~.....,.<<=lw.t=""""'-

3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY 0+, based on 4.9-m bottom trawl sampling, SALEH 316(b) STUDY Delaware River Estuary. ..._.,,,,,,;

Figure 4-211

• ~~~~~~~..-.."""""""'

4-252 BAY ANCHOVY 0+

SEP. 10-13, 1979 DELAWARE RIVER ESTUARY, rkrn 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 12] > 0.000 TO 2.300

~ > 2.300 TO 4.600 mi > 4.600 TO 6.900

!ill > 6.900 TO 9.200 N

A I

DELAWARE ATLANT:LC OCEAN

~

.~

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COHPA.\'Y o+, based on 4.9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-212

~~~

4-253

• BAY ANCHOVY O+

SEP. 25-27, 1979 DELAWARE RIVER ESTUARY, rkrn 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.ooo 0 > 0.000 TO 1.020

~ > 1.020 TO 2.040 00 > 2.040 TO 3.060

.9 > 3.060 TO 4.083 NEW JERSEY N

I DELAWARE Hean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COHPA.\'Y 0+, based on 4. 9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Es~~~

Figure 4-213

~""'""'"""""..,.,._......,""""",,.,.,.,."""""""'""'"""""'""""".......""""".....,."I"""""=-"""""""""'-~~"""'""""'"~*""""""""""""""""""~

4-254 BAY ANCHOVY 0+

OCT. 11, 1979 DELAWARE RIVER ESTUARY, rkni 0-117 LEGEND DE.t~SITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.180

~ > 0.180 TO 0.360

!Pl > 0.360 TO 0.540 Ill > 0.540 TO 0.720 N

IA I

DELAWARE

~-~======="'=-~-="""""=--""""'""""'\'i=--=-=-==="""""'""""""""""'"""""'""""""""""'"""""==~====-"""""'...,.,.='""11 3

Hean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m bottom trawl sampling,

• SALEH 316(b) STlJDY Delaware River Estuary.

~""""'""""""""""""""""'--"""""'"""""""""'=-sn=o==3~--""""""'--=~

Figure 4-214

4-255

• BAY ANCHOVY 0+

OCT. 22-23, 1979 DELAWARE RIVER ESTUARY, rkrn 0-117 LEGE.t~D DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.305

~ > 0.305 TO 0.610

!Bl > 0.610 TO 0.915 Ii > 0.915 TO 1.220 N

I DELAWARE Mean density (nwnber/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COHPANY 0+, based on 4.9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-215

4-256 BAY ANCHOVY 0+

NOV. 15, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.780

~ > 0.780 TO 1.560 Ull > 1.560 TO 2.34-0 I > 2.340 TO 3.123 NEW JERSEY N

iJ.

I DELAWARE

4-257

• BAY ANCHOVY 0+

NOV. 19-21, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 1.285

~ > 1.285 TO 2.570

!Ml 2.570 TO 3.855 Im > 3.855 TO 5.140 N

A I

DELAWARE

4-258 BAY ANCHOVY 0+

NOV. 27, 1979 DELAWARE RIVER ESTUARY, rklll 0-1f7 LEGEl~D DEl~SITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.715

~ > 0.715 TO 1.430 181 > 1.430 TO 2.145 llil > 2.145 TO 2.860 N

I DELAWARE Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC A.'ID GAS COHPA.'iY 0+, based on 4. 9-m bot torn trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

• ~.NR~~~~~~,.,.,,,,....,,.~

Figure 4-218

4-259

• BAY ANCHOVY 0+

DEC. 4-7, 1979 DELAWARE RIVER ESTUARY, rkrn 0-117 LEGE.t"\TD DENS I TY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.700

~ > 0.700 TO 1.400

~ > 1.400 TO 2.100

!;11 > 2.100 TO 2.804 NEW JERSEY

• N I

DELAWARE

~........-:!i'-~""1!'~~~~~~.l.:f..~~R:~~~"""""""""""'""""""

~""""""""""'~"""""'-="""""~~=="'"""""-""""""'--;i"""""'====--==-==m=>="""""'""""'=-~-==""""""=-="""""-="""""'""'l Mean density (number/lOOmJ) of bay anchovy PUBLIC SERVICE ELECTRIC A.'ID GAS COHPA.'ff 0+, based on 4. 9-m bottom trawl sampling, SALEM 316(b) STUDY Dela~,mre Ri:::..::~~~=~

, Figure 4-219

-.,.,,.===~==-""""'"'"""""==...,.....,....,.---~~~~~~~~~~=--"""""'"""""-

4-260 BAY ANCHOVY 0+

JAN. 16-18, 1980 DELAWARE RIVER ESTUARY, rkm 0-1V LEGEND DE.i'l"SITY PER 100 CUBIC METERS 0 0.000 l2l > 0.000 TO 2.685

~ > 2.685 TO 5.370

!!!! > 5.370 TO 8.055 a > 8.055 TO 10.740 N

i DELAWARE ATLANTIC OCEAN

.......==========-==='-"=-==<='1><<<=~~2~~~~~-""""""""""""'""'"""""~

~~~~ ~~ .

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COHPA..'<'Y 0+, based on 4.9-m bottom trawl sampling,

• SALEH 316(b) STUDY Delaware River Estuary.

• • ~~~

Figure 4-220

~==~""""""""""'"'"""'""""""'""""'""""'"""""-=-=....=="""=-=~~

4-261

• BAY ANCHOVY 0+

JAN. 28-29, 1980 DELAWARE RIVER ESTUARY, rkrn 0-117 LEGEND DEt'l"SITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.q40 til > 0.540 TO 1.080 Ii<< > LOBO TO 1.620

~ > 1.620 TO 2.160 N

t 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC A.'i"D GAS COMl'ANY o+, based on 4.9-m bottom trawl sampling, ll><mn=->=-=~~

Delaware River Estuar .

,~ , 4~~~

~--~.:=====M>=m '='~~=-j

4-262 BAY ANCHOVY 0+

MAR 24-27, 1980 DELAWARE RIVER ESTUARY, rkin 0-117 LEGE.i'l'D DENS I TY PER 100 CUBIC METERS 0 0.000 ISLAND 0 > 0.000 TO 0.175

~ > 0.175 TO 0.350 Im > 0.350 TO 0.525 Ill! > 0.525 TO 0.700 NEW JERSEY i

N NOT SAMPLED DELAWARE XTLANTIC OCEAN ri'='""'""'""'~mr*sm~.m~am-~"*""~"""""'=1:!"'~~~"""""'"""""'""""'""""'="""""=~"""""""""'==""""'====""'11 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COHPANY 0+, based on 4. 9-m bottom trawl sampling,

• SALEM 316(b) STUDY Delaware River Estuary.

~~~l~~~..i:r.m~'""""'""""""""""~

Figure 4-222

4-263 BAY ANCHOVY O+

APR 7-11, 1980 DELAWARE RIVER ESTUARY. rkm 0-117 LEGE.i"\fD DENSITY PER 100 CUBIC METERS D 0.000 f2l > 0.000 TO 0.050

~ > 0.050 TO 0.100

~ > 0.100 TO 0.150 Bl > 0.150 TO 0.200 N

t 1!1 DELAWARE 11//ff;j I

1///1 I 1/1/ j1f11 I; Ijlfj/lzf;I ATLA.t'TTI C

/. x).(x/ OCEAN 11fxf:xX 111,~ \ I

"'~--=,,,,.,.,,,..,,.,,,...""'""-'"""'""""'"""'--""~"""""""""'"==~==""""="""""-~"""""""'J

~~*~a~~~...,.~

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COHP;IJ'<Y 0+, based on 4. 9-m bottom trawl sampling, SALEH 316(b) STUDY Delaware River Estuary.

4-264 BAY ANCHOVY O+

APR 21-23, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 1605

~ > 1.605 TO 3.210 llil > 3.210 TO 4.815 Iii 4.815 TO 6.422 N

t

• DELAWARE ATLA.t'iTIC OCEA.t"\l" 11""""===~==*==~"""~"""""'.....,.,,,~"""""'== - """-""""'

3 Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COHPA.NY o+, based on 4.9-m bottom trawl sampling,

• SALE~! 316 (b) STUDY Delaware River Estuary.

,w~~!U'-",,~-~~~..~~.tm; Figure 4-224

4-265 BAY ANCHOVY 0+

JUL 7-11, 1980 DELAWARE RIVER ESTUARY, rkin 0-117 LEGE.t'l"D DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.075

~ > 0.075 TO 0.150 ll!I > 0150 TO 0.225

~ > 0.225 TO 0.3CO NEW JERSEY N

A I

DELAWARE ATLANTIC OCEAN

4-266 BAY ANCHOVY O+

JUL. 14-18, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGE.t"'iD DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.265

~ > 0.265 TO 0.530 l!ll > 0.530 TO 0.795

~ > 0.795 TO 1060 NEW JERSEY N

A I

D:&.'LAWARE ATLAJfTIC OCEAN

4-267 BAY ANCHOVY O+

JUL. 21-25, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGElW DE.i~SITY PER 100 CUBIC METERS

0. 0.000 0 > 0.000 TO 3.345

~ > 3.345 TO 6.690

~ > 6.690 TO 10.035

~ > 10.035 TO 13.380 N

I DELAWARE ATLANTIC OCEAN m~mccoc-=.,.,*==""'*""vm=rr'"""""'....,..,""""""""""'~"""""""'*===~~--~~

• Mean density (nlli~ber/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COHPA.NY o+, based on 4.9-m bottom trawl sampling,

• SALEM 316(b) STUDY Delaware River Estuary.

~"""""'-~~'iWl~~~~~~ll:O"~

Figure li-227

4-268 BAY ANCHOVY O+

AUG. 4-7, 1980 DELAWARE RIVER ESTUARY, rkrn 0-117

/J

f yI 1 0 0.000 LEGE.l'iD DEl'iSITY PER 100 CUBIC METERS

/! ARTIFICIAL ISLANI) 0 > 0.000 TO 11.170 I/.//,I ~ > 11.f?O TO 22.340

'Yv;/1!11 1

1;1/I-; iil! > 22.340 TO 33.510 Y!;l;j;1;

~ ;11/11 11!! > 33.510 TO 44.680 1/!/fJ

.;i;;I; /(

/

~~f!/!f!1 I Y;f/ j 1/: j/11I NEW JERSEY N v. 111. . 1~* *IJ!;f/(1

.. 1:11/1/111 ~

A .* . x:i.~Jf/j/jfj;(ljfj!///{JJ,~

I IJJ!/J!l/!il#!#Ff

~/flf/J/Jjlf!fff! /;~If1ffjff}f Ji;

1. J/Jli/1~

~;l;I;1 I I; ;If1/1~

1j1j1f1/1 11/1/1/11/

iff/f/!ff; ffj///!/!f~

DELAWARE ff/!/!/! 1/jff!/!/!)/

11/;ff1 1 11

!/!/!/!

l;l;l;l;I

//!/

. I /j/jf1 ATLANTIC

j;I OCEAN

I ean density ( num be

717:3)=~~:;-:~=:;

o+,

PUBLIC SERVICE ELECTRIC AND GAS COHPA.'fi based on l1. 9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-228

4-269 BAY ANCHOVY 0+

AUG. 11-14, 1980 DELAWARE RI VER ESTUARY, rkrn 0-117 LEGE.t'tD DE.l~SITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 6.270

~ > 6.270 TO 12.540 nll > 12.540 TO 18.810

~ > 18.810 TO 25.080 N

A I

DELAWARE ATLANTIC OCEAN PUBLIC SER'llCE ELECTRIC AND GAS COHPANY

• -**~:*::::::~::;;;~~7~3~:;=:;::;::1y 0+, based on 4. 9-m bottom trawl sampling, SALEH 316(b) STUDY Delaware River Estuary.

--~i;;;:-4-229"""--='<===-'-"==1

~~~.¥ ~~~"l""P-t~ .. - *-~~~~ .... *. ~~

4-270 BAY ANCHOVY 0+

AUG. 18-23, 1980 DELAWARE RI VER ESTUARY, r km 0-117 LEGEND DE.t'l"SITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 4.020

~ > 4.020 TO 8.040

~ > 8.040 TO 12.060 Im > 12.060 TO 16.080 N

t

• DELAWARE

-~~~~"""'"

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC A.~D GAS COMPANY o+, based on 4.9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

~ ~~~~.

Figure 4.:...230

4-271 BAY ANCHOVY 0+

SEP. 2-5, 1980 DELAWARE RIVER ESTUARY, rkIIl 0-117 LEGE.l'iD DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO *6.755

~ > 6.755 TO 13.510

~ > 13.510 TO 20.265

§ > 20.265 TO 27.020

• t N

DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY 0+ , based . on 4. 9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary*

Figure 4-231

4-272

..----------** BAY ANCHOVY 0+

SEP. 8-12, 1980 DELAWARE RIVER ESTUARY, rkin 0-117 LEGE.l'iD DENS I TY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 14.295

~ > 14295 TO 28.590 DB > 28.590 TO 42.885 il > 42.885 TO 57.180 N

I DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-232

4-273

• BAY ANCHOVY 0+

SEP. 22-26, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEi~D DEi~SITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 2.495

~ > 2.495 TO 4.990 1111 > 4.990 TO 7.485

• I'S*

I > 7.485 TO 9.980 NEW JERSEY N

A I

DELAWARE Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m bottom trawl sampling, SALEM 316(b) STIJDY Delaware River Estuary *

.._______________________......i________________________________....i Figure 4-233

4-274 BAY ANCHOVY 0+

SEP. 29, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY 'PER 100 CUBIC METERS 0 0.000*

0 > 0.000 .TO 1205

~ > 1.205 TO 2.410 D!I > 2.410 TO 3.615 ()

I > 3.615 TO 4.820 N

i DELAWARE ATLAl'iTIC OCEAN 3

Mean densit; (number/100m ) of bay anchovy o+, based on 4.9-m bottom trawl sampling, PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-234

4-275 BAY ANCHOVY 0+

OCT. 6-9, 1980 DELAWARE RIVER ESTUARY, rkm .0-117 LEGEND DENS I TY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO L635

~ > L635 TO 3.270

!ID > 3.270 TO 4.905 I > 4.905 TO 6.540 N

t DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m bottom trawl sampling, SALEM 3l6(b) STUDY Delaware River Estuary.

Figure 4-235

4-276 BAY ANCHOVY 0+

. OCT. 20-23, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 1.080

~ > 1.080 TO 2160 11!1 > 2160 TO 3.240 I > 3.240 TO 4.320 N

i DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMP.A.."r! o+, based on 4.9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-236

4--277

• BAY ANCHOVY O+

NOV.. 3-7, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 l2l > 0.000 TO 1.035

~ > 1.035 TO 2.070 nu > 2.070 TO 3.105

.a > 3.105 TO 4.140 N

i DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m bottom trawl sampling, SALEM 3l6(b) STUDY Delaware River Estuar

• Figure 4-237

4-278 BAY ANCHOVY 0+ (SURFACE)

JUL. 6-10, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > .0.000 TO 1.120

~ > 1120 TO 2240 11!'1 > 2240 to 3.360 I > 3.360 TO 4.480 NEW JERSEf N

t

• DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy

• PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-238

4-279

• BAY ANCHOVY 0+ (SURFACE)

JUL. 13-17, 1981 DELAWARE RI VER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 13.220

~ .> 13.220 TO 26.440 s > 26.440 TO 39.660 I .> 39.660 TO 52.880 N

I DELAWAP.E 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure .4-239

4-280

.-----------------~*

BAY ANCHOVY 0+ (SURFACE)

JUL. 27-30, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 0 > 0.00 TO 34.35

~ > 34.35 TO 68.70 an > 68.70 TO 103.05 I > 103.05 TO 137.40 N

'I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy o+, based on pelagic fixed-frame tra~l PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-240 J

4-281

• BAY ANCHOVY 0+ (SURFACE)

• AUG. 3-6, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.00 0 > 0.00 TO 29.35

~ > 29.35 TO 5a7o Ill > 58.70 TO 88.05 I > 88.05 TO 117.40 N

i DELAWARE

. ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based 6n pelagic fixed-frame trawl

• SALEM 316(b) STUDY sampling, Delaware Rive~ Estuary.

Figure 4-241

4-282

---

..* BAY ANCHOVY 0+ (SURFACE)

AUG. 17-22, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENS I TY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 6.305

~ > 6.305 TO 12.610

!Ill > 12.610 TO 18.915 Ill > 18.915 TO 25.220 N

'I .

DELAWARE ATL.Al~TIC OCEAN 3

Mean density (num.ber/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-242

4-283 BAY ANCHOVY O+ (SURFACE)

AUG. 24-27, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 17.865

~ > 17.865 TO 35.730 1111 > 35.730 TO 53.595 I > 53.595 TO 71.460 N

i DELAWARE 3 .

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY 0+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure -2 3

4-284 BAY ANCHOVY 0+ (SURFACE)

AUG. 31 - SEP. *3, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 f2l > 0.000 TO 12.350

~ > 12.350 TO 24.700 an > 24.700 TO 37.050 I > 37.050 TO 49.400 N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA."lY o+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY samnling, Delaware River Estuary.

Figure 4-244

4-285 BAY ANCHOVY 0+ (SURFACE)

• SEP. 14-18, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 7.980

~ > 7.980 TO 15..960 1111 > 15.960 TO 23.940 I > 23.940 TO 31.920 NEW JERSEY N

i DEL.AWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl

. SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-245

4-286

.------------------.* BAY ANCHOVY O+ (SURFACE)

SEP. 21-25, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 10.130

> 10.130 TO 20260

!In > 20260 TO 30.390 I > 30.390 TO 40.520 N

• I

• DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-246

4-287 BAY ANCHOVY 0+ (SURFACE)

OCT. 5-9, 1981 DELAWARE RIVER ESTUARY, rkrn 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 l2l > 0.000 TO 4.955

~ > 4.955 TO 9.910 l!D > 9.910 TO 14.865 Ill > 14.865 TO 19.820 N

t DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy o+, based on pelagic fixed-frame trawl PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-247

4-288

---

* BAY ANCHOVY 0+ (SURFACE)

OCT. 19-22, 1981 DELAWARE RIVER ESTUARY, rkm 0~117 LEGEND DENSITY PER 100 CUBIC METERS D 0.00 Ll  :> 0.00 TO 32.95

~ > 32.95 TO 65.90 1111 > 65.90 TO 98.85 II > 96.85 TO 131.80 NEW JERSEY

.N I

DELAWARE 3

Mean density (number/lOOm ) of bay anchovy o+, based on pelagic fixed-frame trawl PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-248

4-289

• BAY ANCHOVY 0+

JUN. 1-5, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.005

~ > 0.005 -TO 0.010

~ > 0.010 TO 0.015 I > 0.015 TO 0.020 NEW JERSEY N

i DELAWARE ATLANTIC OCEA.i'l" 3

Mean density (m.nnber/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY 0+, based on 4. 9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-249

4-290 BAY ANCHOVY 0+

JUL. 6-10, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.020

~ > 0.020 TO 0.040 Ill > 0.040 TO 0.060 II > 0.060 TO 0.080 NEW JERSEY N

i I

DELAWARE ATLANTIC OCEA.1.~

3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m bottom trawl sampling, SALEM 316(b) STUDY Del ware River Estuar

• Figure 4-250

4-291 BAY ANCHOVY 0+

JUL. 13-17, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO. 0.030

~ > 0.030 TO 0.060 DD > 0.060 TO 0.090 II > 0.090 TO 0.120 NEW JERSEY 1*

I I

N I

DELAWARE ATLA.L'l'TI C OCEAN 3

Mean density (ntUnber/lOOm ) of bay anchovy o+, based on 4.9-m bottom traw~ sampling, PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-251

4-292

---

~*

BAY ANCHOVY 0+

JUL. 27-30, 1981 DELAWARE RIVER ESTUARY; rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.975

~ > 0.975 TO 1.950 ll!I > 1.950 TO 2.925 I 2.925 TO 3.900 t

N DELAWARE ATLANTIC OCEAN 3

Mean density (ntunber/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY 0+, based o*n 4. 9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuar

• Figure 4-252

4-293 BAY ANCHOVY 0+

AUG. 3-6, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGE.i.'ID DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 13.720

~ > 13.720 TO 27.440 DU > 27.440 TO 41.160 Ill > 41.160 TO 54.883

• N t

DELAWARE ATL.Al'lTI C OCEAN Mean density (m.unber/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

• Figure 4-253

4-294 BAY ANCHOVY 0+

AUG. 17-22, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 IZI > 0.000 TO 0.790

~ > 0.790 TO 1.580 llD > 1.580 TO 2.370 II > 2.370 TO 3.160 NEW JERSEY N

i

• DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-254

4-295 BAY ANCHOVY 0+

AUG. 24-27, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 0.635

~ > 0.635 TO 1.270 DD > 1.270 TO 1.905 I > 1.905 TO 2.540 N

I DELAWARE ATLANTIC OCEAN

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary

• Figure 4-255

4-296 BAY ANCHOVY 0+

AUG. 31 - SEP. 3, 1981 DELAWARE RIVER ESTUARY, rkm 0-1f7 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 0.900

~ > 0.900 TO 1800 lB > LBOO TO 2.700 I > 2.700 TO 3.600 NEW JERSEY N

i DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA."iY o+, based on 4. 9-m bottom trawl sampling.

• SALEM 316(b) STUDY Delaware River Estuary.

ti----o------1 Figure 4-256

4-297 BAY ANCHOVY 0+

SEP. 14-18, 1981 DELAWARE RIVER ESTUARY, rkni 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.295

~ > 0.295 TO 0.590 ll!I > 0.590 TO 0.885 I > 0.885 TO 1.184 N

i DEL.AWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY 0+, based on 4. 9-m bottom trawl sampling,

• SALEM 316(b) STUDY Delaware River Estuary *

.__ _..._ Figure 4-257

4-298 BAY ANCHOVY 0+

SEP. 21-25, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 21.800

~ > 21800 TO 43.600 s > 43.600 TO 65.400 II > 65.400 TO 87.200 N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-258

4-299 BAY ANCHOVY 0+

OCT. 5-9, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 1.515

~ > 1.515 TO 3.030

!Ill > 3.030 TO 4.545 I > 4.545 TO- 6.060 NEW JERSEY

• N i

DELAWARE

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-259

4-300 BAY ANCHOVY 0+

OCT. 19-22, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.705

~ > 0.705 TO 1.410 Ill! > 1.410 TO 2.115 I > 2.115 TO 2.820 N

i DEL.AWARE ATLA.i'iTIC OCEAN 3

Mean density (nlllnber/lOOm ) of bay anchovy I

PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on 4.9-m bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-260 I

I

4...;301 BAY ANCHOVY 0+ (SURFACE)

JUN. 28 - JUL. 3; 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.880

~ > 0.880 TO 1760 DI > 1760 TO 2.640 I > 2.640 TO 3.520 NEW JERSEY N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMP.A.~ o+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-261

4-302 BAY ANCHOVY O+ (SURFACE)

JUL. 12-15, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 4.880

~ > 4.880 TO 9.760 11!1 > 9.760 TO 14.640 I > 14.640 TO 19.520 N

I DELAWARE ATLANTIC OCEAN

• I 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl

• SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-262

4-303 BAY ANCHOVY 0+ (SURFACE)

JUL. 19-23, 1982 DELAWARE RIVER ESTUARY, rkm (}-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 Ill > 0.000 TO 10.645

~ > 10.645 TO 21.290 Dll > 21.290 TO 31.935 Ill > 31.935 TO 42.580 NEW JERSEY N

i DELAWARE ATLANTIC OCEAN

. . 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-263

4~304 BAY ANCHOVY 0+ (SURFACE)

JUL. 26~30, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 15165

~ > 15.165 TO 30.330 s > 30.330 TO 45.495 I > 45.495 TO 60.660 NEW JERSEY N

'I DELAWARE ATLANTIC OCEAN Mean density (number/lOOmJ) of bay anchovy

• PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-264

4-305 BAY ANCHOVY 0+ (SURFACE)

• AUG. 2-5, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 5.955

~  :> 5~955 TO 11.910

!Ill :> 11.910 TO 17.865 I  :> 17.865 TO 23.820 NEW JERSEY '

N i

DELAWARE An.A.i."'l'TI C OCEAN

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMP.A..-.Y o+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-265

4-306 BAY ANCHOVY 0+ (SURFACE)

AUG. 16-19, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 Id > 0.000 TO 16.895

~ > 16.895 TO 33.790 DI > 33.790 TO 50.685 I > 50.685 TO 67.580 N

'I DELAWARE 3

Mean density (nl.DD.ber/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed~frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-266

4-307 BAY ANCHOVY 0+ (SURFACE)

AUG. 23-27, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 12.585

~ > 12.585 TO  ?.5.pO 11!1 > 25.170 TO 37.755

• > 37.755 TO 50.340 NEW JERSEY N

'I DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl

. SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-267

4-308 BAY ANCHOVY 0+ (SURFACE)

AUG. 30 - SEP. 2, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.00 121 > 0.00 TO 56.40

~ > 56.40 TO 112.80 llll > 112.80 TO 169.20 II > 169.20 TO 225.60 NEW JERSEY N

t DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-268

4-309

• BAY ANCHOVY 0+ (SURFACE)

SEP. 13-16, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000

!2l > 0.000 * *TO 11.625

~ > 11.625 TO 23250

[Ill > 23250 TO 34.875 II > 34.875 TO 46.500 NEW JERSEY N

i DELAWARE AT!.AJ."'l'TI C OCEAN 3

Mean density (number/lOOm ) of.bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-269

4-310 BAY ANCHOVY 0+ (SURFACE)

SEP. 27 - OCT. 1, 1982

• j DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 21060

~ > 21060 TO . 42120 DD > 42120 TO 63.180 I > 63.180 TO 84.240 N

I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl

• SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-270

4-311 BAY ANCHOVY 0+ (SURFACE)

OCT. 12-14, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 11.065

~ > U.065 TO 22J30 11!1 > 22J30 TO 33195 I > 33.195 TO 44.262 NEW JERSEY N

i DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-271

4-312

...-----------* BAY ANCHOVY 0+ (SURFACE)

OCT. 27-29, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 3.000

~ > 3.000 TO 6.000 9 > 6.000 TO 9.000 I > 9.000 TO 12.002 N

i DELAWARE

. 3 Mean density (ntunber/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on pelagic fixed-frame trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-272

4-313 BAY ANCHOVY 0+

JUL. 12-15, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 0.060

~ > 0.060 TO 0..120 Ill > 0..120 TO 0.180 I > 0.180 TO 0.240 NEW JERSEY N

• I DELAWARE ATLANTIC OCEAN Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-273

4-314 BAY ANCHOVY 0+

JUL. 19-23, 1982 DELAWARE RIVER ESTUARY, rkm 0-1!7 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 IZI > 0.000 TO 0.005 Cl! . > 0.005 TO 0.010 IS > 0.010 TO 0.015 I > 0.015 TO 0.020 NEW JERSEY N

I DEL.AWARE ATLANTIC OCEAN Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-274

4-315 '

• BAY ANCHOVY 0+

JUL. 26-30, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.240 8 > 0.240 TO 0.480 DI! > 0.480 TO 0.720 II > 0.720 TO 0.980 NEW JERSEY N

'I DELAWARE ATLANTIC OCEAN Mean density (number/lOOmJ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on bottom trawl sampling, Delaware River Estuary.

SALEM 316(b) STUDY Figure 4-275

4-316 BAY ANCHOVY 0+

AUG. 2-5, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 13.100

~ > 13.100 TO 26200 DI > 26.200 TO 39.300 I > 39.300 TO 52.400 N

t DELAWARE Mean density (number/lOOm ) of bay anchovy 0+, based on bottom trawl sampling, PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-276

4-317

• • BAY ANCHOVY O+

AUG. 16-19, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 .

LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO U75 fil > 1.175 TO 2.350 ll!I > 2.350 TO 3.525 I > 3.525 TO 4.700 N

'I

• DELAWARE ATLAi"'l'TIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-2 77

4-318 BAY ANCHOVY 0+

AUG. 23-27, 1982 DELAWARE RIVER ESTUARY, rkm 0-:117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.600

~ > 0.600 TO 1.200 DD > 1.200 TO 1.800 I > 1.800 TO 2.400 N

I DEL.AWARE ATLANTIC OCEA.i'i Mean density (number/lOOm::s) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-278

4-319 BAY ANCHOVY 0+

AUG. 30 - SEP. 2, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 >. 0.000 TO 1.995

~ > 1.~95 TO 3.990 1111 > 3.990 TO 5.985 I > 5.985 TO 7.980 N

'I DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on bottom trawl sampling, SALEM 3l6(b) STUDY Delaware River Estuary.

Figure 4-279

4-320

.--------------------* BAY ANCHOVY O+

SEP. 13-16, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.200

~ > 0200 TO 0.400 1111 > 0.400 TO 0.600 I > 0.600 TO 0.800 NEW JERSEY N

I DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY (}!-' based on bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-280

4-321 BAY ANCHOVY 0+

SEP. 27 - OCT. 1, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.970

~ > 0.970 TO 1.940 llU > 1.940 TO 2.910 I > 2.910 TO 3.880 N

i DELAWARE 3

Mean density (number/100m ) of. bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY b+, based on bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-281

4-322 BAY ANCHOVY 0+

OCT. 12-14, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEl"ID DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.090

~ > 0.090 TO 0.180 llD > 0.180 TO 0.270 I > 0.270 TO 0.360 NEW JERSEY DELAWARE ATLANTIC OCEAN 3

Mean density (nwnber/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.'ll o+, based on bottom trawl sampling' SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-282

4-323 BAY ANCHOVY O+

OCT. 27-29, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.440 I ~ > 0.440 TO 0.880 Dll > 0.880 TO 1.320 I > 1.320 TO 1.760

• N

• I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY o+, based on bottom trawl sampling, SALEM 316(b) STUDY Delaware River Estuary.

Figure 4-283

(/)

~ BAY ANCHOVY 0+ - 1979 (SURFACE) r:il 65 t-i r.z:I

s 60 u

1-t 55 Jil 0 50 u

0 45 0

....-i 40

~

~

P... 35

~

r.z:I 30 Jil

s 25 0

z

.._,, 20

~ 15 t-i 1-t

(/) 10 zr:il

~ 5 z<!! 0-r.z:I JAN FEB. MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

s Mean density and 95% C.I. of bay anchovy _o+ taken by 4.9-m surface PUBLIC SERVICE ELECTRIC AND GAS COMPANY trawl in the Delaware River Estuary' 1979.

SALEM 316(b) STUDY Figure 4-284

~

(/)

BAY ANCHOVY 0+ - 1979 ril.

E-t 65 Pi!

~ 60 u

t-t 55 ril

~ 50 0

0 45 0

..--I 40

~

r.:i::l p.. 35

~

~ I Pi! 30 w ril N

~ 25 U1

~

z

........_, 20

>-i 15 E-t t-t

(/) 10 zr£I

~ 5 z 0

-~

< JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

~

Mean density and 95% C.I. of bay anchovy o+ taken by 0.5-m bottom PUBLIC SERVICE ELECTRIC AlID GAS COMPANY trawl in the Delaware River Estuary, 1979.

SALEM 316(b) STUDY Figure 4:-285

(/)

~ BAY ANCHOVY 0+ - 1980 r:LI 65 f-1 r:r.:i

~ 60 u

........ 55

~

~ 50 u

0 45 0

40

~

r:r.:i

~ 35

~ 30 of:.

r:r.:i I

• ~ w l\J

~ 25 O'I

~

z

....._.., 20

~ 15*

f-1 fl) 10 z

r:LI Cl 5 z 0 r:r.:i JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

~

Mean density and 95% C. I. of bay anchovy o+ taken by 4. 9-m bottom PUBLIC SERVICE ELECTRIC AUD GAS COMPANY trawl in the Delaware River Estuary, 1980.

SALEM 316(b) STUDY Figure 4-286 I

~- -

• ~

[/)

~

BAY ANCHOVY

• o+ --

1981 (SURFACE) ril 65 E-t

~ 60 u

t-t 55 J'.Q p 50 u

0 45 0

4.0

~

ril P-t 35 ii:::.

~ 30 I

r:il w N

~

p 25

-..J z

..._,,. 20

~ 15 E-t t-t

[/) 10

~ 5

~

z 0 r:il JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

~

Mean density and 95% C.I. of bay anchovy o+ taken by pelagic PUBLIC SERVICE ELECTRIC .Alm GAS C.OMPANY fixed-frame trawl in the Delaware River Estuary, 1981.

SALEM 316(b) STUDY Figure 4-287

.. ,... **-*-* - ._.r, *" --*** - ' ~ .. "

CJ) i:t: BAY ANCHOVY o+ - 1981 r:r:l 65

~

IZ1

~ 60 0

......... 55 p::i

~ 50 0

0 45 0

40 i:t:

r:r:l Pot 35

,j:::.

~ 30 I

IZ1 w I\.)

p::i CX>

~ 25

~

z

........... 20

~ 15

~

CJ) 10 z

IZ1 5 i::i z 0 IZ1 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

~

Mean density and 95% c. I. of bay anchovy o+ taken by 4.9-m bottom PUBLIC SERVICE ELECTRIC AND GAS COMPANY trawl in the Delaware River Estuary, 1981.

SALEM 316(b) STUDY Figure 4-288

rn

~

BAY ANCHOVY 0+ - 1982 (SURFACE) r::::i 65 E-t r::::i

~ 60 u

1-i 55 c:Q l:) 50 u

0 45 0

..--1 40

~

r::::i 11.t 35

~ 30 r::::i

~ 25

~

b 20

>4 15 E-t 1-i rn 10 z

r::::i

~ 5 z 0 r::::i JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

~

Mean density and 95i.; C.I. of bay anchovy O+ taken by pelagic PUBLIC SERVICE ELECTRIC AHD GAS COMPANY fixed-frame trawl in the Delaware River Estuary, 1982.

SALEM 316(b) STUDY Figure 4-289

if)

~

f.:Ll BAY ANCHOVY o+ 1982 E-1 65-f.:Ll

~ 60-u 1-i 55-

~

,J 50 -

u 0 45-0

,-l 40-

~

f.:Ll 11-! 35-

~ 30-

~

f.:Ll I w

r:n w

~ 25- 0

,J z

...__,, 20-

>-4 15 -

E-1 1-i if) 10-zf.:Ll 5-Q z~ 0- I I I 1- I ~ ~

'1 JI

- 11>._

I

.. I I I I

~ JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

~

Mean density and 95% c. I. of bay anchovy o+ taken by 4.9-m bottom PUBLIC SERVICE ELECTRIC AUD GAS COMPANY trawl in the Delaware River Estuary, 1982.

SALEM 316(b) STUDY Figure 4-290

4-331

• 1000000 AY ANCHOVY 0+ - 1979 (SURFACE) rkm 113-117

...-.. 0 C/J

~1000000 lil rkm 97-113 E-t

~

~

-u CQ1000000 u

0 rkm 80-97 z0 I

0

j1000000

~

~

rkm 64-80 r.:::i 0

~

~1000000 rkm 48-64 lil C!l

~

> 0 z

. .._,1000000

~ rkm 32-48

-z E-t C/J lil .

0 01000000 rkm 16-32 z

~

~

0 1000000 rkm 0-16 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy o+,.

PUBLIC SERVICE ELECTRIC AND GAS COMPA..-.Y based on Lt.9-m surface trawls, Delaware SALEM 3l6(b) STUDY River Estuary - 1979.

Figure 4-291

4-332 BAY ANCHOVY O+ - 1979 1000000 r km 113-;-117

.--. 0 en P::: 1000000 f,:i::l rkm 97-113

~

f,:i::l

=a u 0-1-f m1000000 0 rkm 80-97 u

z0 0

1-f

j1000000 1-f rkm 64-80

~

P:::

f,:i::l 0 l1t

~1000000 rkm 48-64 f,:i::l m

~

0 0 z

.._.1000000

> rkm 32-48 E-c 1-1 en zf,:i::l 0

~1000000 rkm 16-32 z

f,:i::l

~ 0 1000000 rkm 0-16 0,

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy o+,

PUBLIC SERVICE ELECTRIC AND GAS COMPA.."n based on 4.9-m bottom trawls~ Delaware SALEM 316(b) STUDY River Estuary - 1979.

Figure 4-292

4-333

• 1000000 BAY ANCHOVY 0+ -

rkm 113-117 1980 rkm 97-113 u

1-4 p:ilOOOOOO 0 rkm 80-97 u

z 0 Q-l--b-o!rr-~-r-----.!r-r-:i!r-:i!~ri!n!i,..-,6-lrlr~~~~"-r...11ii=-~'6-6-r6----r~---.

1-4 jioooooo rkm 64-80 1-4.

~

rkm 48-64 rkm 32-48 rkm 16-32 Regional mean density of bay anchovy o+,

PUBLIC SERVICE ELECTRIC AND GAS COMPA.'ff SALEM 316(b) STUDY

....,River based on 4. 9-m bottom trawls' Delaware .....,.

Estuary - 1980

• Figure 4-293

4-334 AY ANCHOVY o+ - 1981 (SURFACE) 1000000 rkm 113-117 0

rr.l

~*1000000

~ rkm 97-113 E-t

~

~

C,) 0 t-1 Ill 1000000 0 rkm 80-97 C,)

z0 0 1-t

31000000 1-t rkm 64-80

~

~

~ 0 P-.

~1000000 rkm 48-64

~

Ill

al 0 0 z

.._..1000000

>4 rkm 32-48 E-t 1-t rr.l z O*

~

01000000 rkm 16-32 z

~

2! 0-1000000 rkm 0-16 0,

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy O+,

PUBLIC SERVICE ELECTRIC AND GAS COMPANY based on pelagic fixed-frame trawl SALEM 316(b) STUDY collections, Delaware River Estuary - 1981.

Figure 4-294

4-335

• 1000000 BAY ANCHOVY 0+ -

rkm 113-117 1981

~

0 rn

. ~1000000 r:il rkm 97-113 E-t r:il

~

u 0 1-1

(:I.l 1000000

> rkm 80-97 u

z 0 0 1-1 jloooooo 1-1 rkm 64-80

~

~

r:il ,o P-t

• ~

r:il m

~

z 1000000 0-

.......,,1000000 rkm 48-64 rkm 32-48

>i E-t 1-1 rn z

r:il 0

A1000000 z rkm 16-32 r:il

~

0 1000000 rkm 0-16 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy o+,

PUBLIC SERVICE ELECTRIC AND GAS COMPANY based on 4. 9-m bottom trawls' Delaware SALEM 316(b) STUDY River Estuary - 1981.

---

~~--------------

Figure 4-295 .......

4-336 1000000 AY ANCHOVY 0+ - 1982 (SURFACE) rkm 113-117

..-... 0 en 0::1000000 r:i::l rkm 97-113

~

r:i::l

21 u 0 1-1 p:::i1000000

> rkm 80-97 u

z0 0 1-1

j1000000 1-1 rkm 64-80

21 0::

r:i::l 0 P-i 0:: 1000000 rkm 48-64 r:i::l p:::i

a

> 0 z

--1000000

>i rkm 32-48

~

1-1 en z

r:i::l a

i=l1000000 z rkm 16-32 r:i::l

?! a 1000000 rkm 0-16 Q I J.AN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy o+,

PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 3l6(b) STUDY based on pelagic fixed-frame trawl collections, Delaware River Estuary - 1982.

Figure 4-296

4-337

• 1000000 BAY ANCHOVY 0+ -

rkm 113-117 1982

-en

. &11000000 E-t 0

rkm 97-113 r:r:I

~

u 0 1-4 co 1000000 rkm 80-97 0

u z

0 0 1-4

j 1000000 rkm 64-80 1-4

21

~

r:r:I 0 111

~ 1000000 rkm 48-'-64 r:r:I co

~

0 0 z

--1000000

• rkm 32-48

-!>-t E-t

. lfJ z

r:i::i 0

01000000 rkm 16-32 z

r:i::i ,

~

0 1000000 rkm 0-16 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Regional mean density of bay anchovy O+,

PUBLIC SERVICE ELECTRIC AND GAS COMPANY based on 4.9-m bottom trawls, Delaware SALEM 316(b) STUDY River Estuary - 1982.

Figure 4-297

4-338 BAY ANCHOVY 1+ AND OLDER (SURFACE)

APR. 10-12, 1979 DELAWARE RIVER ESTUARY, rkni 0--117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 f2) > o.ooo TO 0.060

~ > 0.060 TO 0.120 llB > 0.120 TO 0.180 I > 0.180 TO 0240 NEW JERSEY N

i

• DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY *l+ and older, based on surface trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-298

4-339

• BAY ANCHOVY 1+ AND OLDER (SURFACE)

APR 24-25, 1979

• DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000

0. > 0.000 TO 4.380

~ > 4.380 TO 8.760 fill > 8.760 TO 13.140 Ill > 13.140 TO f7.520 N

i DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC ANI> GAS COMPANY l+ and older, based on surface trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-299

4-340 BAY ANCHOVY 1+ AND OLDER (SURFACE)

MAY 8-10, 1979 DELAWARE RIVER ESTUARY, rkm 0-117.

LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 >. 0.000 TO 8.635

~ > 8.635 TO rl.270 n!I > rl.270 TO 25.905 II > 25.905 TO 34.540 N

i

• DELAWARE 1/1/11 l71Zzlzl;,

ilzlz1 1/1/1/1/

1/;l;

}lzl I i.7117,

?f1J1

'11 J.

3 Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on surf ace trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-300

1 4-341 BAY ANCHOVY 1+ AND OLDER (SURFACE)

MAY 22-24, 1979

• DELAWARE RivER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 9.950

~ > *9.950 TO 19.900 Ill > 19.900 TO 29.850 II > 29.850 TO 39.800 N

i DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on surface trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-301 .

4-342

.--------------------,* BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUN. 5-7, 1979 DELAWARE RIVER ES':fUARY, rkm 0-1!7 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 5.865 M > 5.865 TO 11.730 DIJ > 11.730 TO fl.595 II > fl.595 TO 23.460 N

i

• DELAWARE ATLAi"lTI C OCE.A.i"l

. 3 Mean density (number/lOOm ) of bay anchovy

PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on surface trawl

• SALEM 316(b) STUDY ~s~am~l-i~n~-D-el*a*w*a-re.._.R.iv*e*r...-Es*t*u-ar._.______--t Figure 4-302

4-343 BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUN. 18-22, 1979

. DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 IZl > 0.000 TO 15.185

~ > 15.185. TO 30.370

!iD > 30.370 TO 45.555 I > 45.555 TO 60.740 N

i DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on surface trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-303

4-344

~---------------* BAY ANCHOVY 1+. AND OLDER (SU_RFACE)

JUL. 2-5, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 3.725

~ > 3.725 TO 7.450 IHI > 7.450 TO 11.175 I > 11.f75 TO 14.900 N

'I DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMP.A.W 1+ and older' based on surface trawl SALEM 316(b) STUDY sam lin Delaware River Estuary.

Figure 4-304

4-345 BAY ANCHOVY 1+ AND OLDER (SURFACE) ..

JUL. 16-20, 1979 DELAWARE RIVER ESTUARY, rkm 0-11'7 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 12] > 0.000 TO 3.520

~ > 3.520 TO 7.040 ll!I > 7.040 TO 10.560 Ill > 10.560 TO 14.080 NEW JERSEY N

i DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on surface trawl SALEM 316(b) STUDY sam lin

• Delaware River Estuary.

Figure 4-305

4-346 BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUL. 31 - AUG. 3, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 4.110

~ > 4.110 TO 8.220 DD > 8.220 TO 12.330 II > 12.330 TO 16.440 NEW JERSEY

.N I

DELAWARE ATL.Ai~TIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY 1+ and older, based on surface trawl SALEM 316(b) STUDY samnling. Delaware River Estuary.

Figure 4-306

4-347

• BAY ANCHOVY 1+ AND OLDER (SURFACE)

AUG. 13-17, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 2.560

~ > 2.560 TO 5.120 DI! > 5J20 TO 7.680 I > 7.680 TO 10240 NEW JERSEY

• N i

DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on surface trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-307

4-348 BAY ANCHOVY 1+ AND OLDER (SURFACE)

AUG. 27-30, 1979 DELAWARE RIVER ESTUARY, rkm 0-1!7 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.485

~ > 0.485 TO 0.970 Ill! > 0.970 TO 1.455 I > 1.455 TO 1.940 NEW JERSEY N

.l I

ATLANTIC OCEAN 3

Mean de~sity (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY 1+ and older, based on surface trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-308

4-349

• BAY ANCHOVY 1+ AND OLDER MAY 15-18, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 4.575

~ > 4.575 TO 9.150 DI! > 9.150 TO 13.725 I. > 13.725 TO 18.302 N

I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.~ l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary

• Figure 4-309

4-350 BAY ANCHOVY 1+ AND OLDER MAY 29 - JUN. 1, 1979 DELAWARE RIVER ESTUARY, rkm 0-1!7 LEGEND DENSITY PER 100 CUBIC METERS

0. 0.000 121 > 0.000 *TO ll.090

~ > 11.090 TO 22.180 1111 > 22.180 TO 33270 a > 33270 TO 44.360 N

i DELAWARE 3

Mean density (num.ber/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.."n' l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-310

4-351

• BAY ANCHOVY 1+ AND OLDER JUN. 12-14, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 9.670

~ > 9.670 TO 19.740 s > 19.740 TO 29.610 I > 29.610 TO 39.480 NEW JERSEY N

i

.. 3 Mean density (number/lOOm ) of bay anchovy

• PUBLIC SERVICE ELECTRIC .AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

• Figure 4-311

4-352

---

.* BAY ANCHOVY 1+ AND OLDER JUN. 25-29, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 2.915

~ > 2.915 TO 5.830 11!1 > 5.830 TO 8.745 I > 8.745 TO 11.660 NEW JERSEY N*

t DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older' based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4_.312

4-353

• BAY ANCHOVY 1+ AND OLDER JUL. 9-13, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 4.700

• ~ > 4.700 TO 9.400 DB > 9.400 TO 14.100 I > 14.100 TO 18.800 N

I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-313

4-354 BAY ANCHOVY 1+ AND OLDER JUL. 24-27, 1979 DELAWARE RIVER ESTUARY. rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 10.390

~ > 10.390 TO 20.780 Im > 20.780 TO 31170.

I > 31.170 TO 41.560 N*

'I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-314

4-355 BAY ANCHOVY 1+ AND OLDER AUG. 6-10, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 7.210

~ > 7.210 TO 14.420 DD > 14.420 TO 21.630 II > 21.630 TO 28.840 N

i DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-315

4-356 BAY ANCHOVY 1+ AND OLDER AUG. 20-24, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 4.545

~ > 4.545 TO . 9.090 1111 > 9.090 TO 13.635 I > 13.635 TO 18.180 N

• I

• DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-316

4,...357 BAY ANCHOVY 1+ AND OLDER SEP. 4-5, 1979 DELAWARE RIVER ESTUARY, rkm 0-117

. LEGEND DENSITY PER 100 CUBIC METERS D o.ooo 0 > 0.000 TO 1.010 fi!'l > 1.010 TO 2.020 llD > 2.020 TO 3.030 I > 3.030 TO 4.040 NEW JERSEY N

i DELAWARE

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older' based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-317

4-358

---

..* BAY ANCHOVY 1+ AND OLDER SEP. 10-13, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.575

~ > 0.575 TO 1.150 l lJ > 1.150 TO l.725 Ill > 1.725 TO 2.300 N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-318

4-359 BAY ANCHOVY 1+ AND OLDER SEP. 25-27, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000.

!2l > 0.000 TO 1030 r8J > 1030 TO 2.060 llll > 2.060 TO 3.090 II > 3.090 TO 4.122 NEW JERSEY N

I DELAWARE

- * 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STIJDY sampling, Delaware River Estuary.

Figure 4-319

4-360 BAY ANCHOVY 1+ AND OLDER OCT. 11, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 0.220

~ > 0.220 TO 0.440 1111 > 0.440 TO 0.660 I > 0.660 TO 0.880 N

I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.W l+ and older' based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-320

4-361 I

I I

I BAY ANCHOVY 1+ AND OLDER OCT. 22-23, 1979 DELAWARE RIVER ESTUARY, rk:m. 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.305

~ > 0.305 TO 0.610 rm > 0.610 TO 0.915 I > 0.915 TO 1.220 N

i DELAWARE ATLA.l"'ITIC OCE.AJ."'I 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY 1+ and older' based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-321

4-362 BAY ANCHOVY 1+ AND OLDER NOV. 15, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.780

~ > 0.780 TO 1.560 11!1 > 1.560 TO 2.340 I > 2.340 TO 3.123 NEW JERSEY N

. /J;f{fffJ

'I lf..;IJ{/1111/111/1111 1/1/1//j/j/jfff /1£ DEL.AWARE ijft!l#l§§IJ 7111/ffff!;fzf1/1 I 1 l7l7l/1l7 I jf I I . I I I I ATL.Al'ITI C lfjf1l *I; OCEAN fzf ff1!

11,I 3

Mean density (number/100m ) of bay anchovy

. PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl

• SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-322

4-363 BAY ANCHOVY 1+ AND OLDER NOV. 19-21, 1979 DELAWARE RI VER ESTUARY, rkm 0--117 LEGEND DENSITY PER 100 CUBIC METERS 0 o.ooo 0 > 0.000 TO 1.150

~ > 1.150 TO 2.300 an > 2.300 TO 3.450 I > 3.450 TO 4.601 N

I DELAWARE Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl

• SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-323.

4-364 BAY ANCHOVY 1+ AND OLDER*

NOV. 27, 1979 DELAWARE RIVER ESTUARY. rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 li!J > 0.000 TO 0.650

~ > 0.650 TO l300 llD > 1.300 TO 1.950 I > 1.9f\O TO 2.600 NEW JERSE.Y N

i DELAWARE Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-324

4-365 BAY ANCHOVY 1+ AND OLDER DEC. 4-7, 1979 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 *o.ooo 0 > 0.000 TO 0.700

~ > 0.700 TO l400 s > 1.400 TO 2.100 I > 2.100 TO 2.804 NEW JER~'EY N

I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.~ l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-325

4-366 BAY ANCHOVY 1+ AND OLDER JAN. 16-18, 1980 DELAWARE RIVER ESTUARY, rkm 0-1f7 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 2.685

~ > 2.685 TO 5.370 DD > 5.370 TO 8.055 I > ao55 TO . 10.740 I

NEW JERSEY I

-N I

DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SER.VICE ELECTRIC AND GAS COMPANY l+ and older' based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-3.26

4-367 BAY ANCHOVY 1+ AND OLDER JAN. 28-29, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.520

~ > 0.520 TO 1.040 Im > 1.040 TO L560 II > 1.560 TO 2.080 NEW JERSEY

• .N I

DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMP.A.~ l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-327

4-368 BAY ANCHOVY 1+ AND OLDER MAR 24-27, 1980 DELAWARE RIVER ESTUARY, rkm 0-1!7 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.035

~ > 0.035 TO 0.070 11!1 > 0.070 TO 0.105 I > 0.105 TO 0.140 NEW JERSEY N

t NOT SAMPLED DELAWARE

\/TLAl~TIC

/ ~CEAN

. ' j Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-328

4-369 BAY ANCHOVY 1+ AND OLDER APR 7-11, 1980

. DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > o.ooo ro 0.015

• ~ > 0.015 TO 0.030

!ID > 0.030 TO 0.045 I > 0.045 TO 0.060 NEW JERSEY N

'I DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) ot: bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-329

4-370 BAY ANCHOVY 1+ AND OLDER APR. 21-23, 1980 DELAWARE RIVER ESTUARY, rkm 0-1!7.

LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.605

~ > 0.605 TO 1210

~ > 1.210 TO 1.815 I > 1.815 TO 2.420 N

i DELAWARE ATI...Ai~TIC OCEAN 3

~ean density (number/lOOm ) of. bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-330

4-371 BAY ANCHOVY 1+ AND OLDER MAY 5-7, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 1.065

~ > 1.065 TO 2130 DI! > 2.130 TO 3.195 I > 3195 TO 4260 N

I DELAWARE 3

Mean density (number/lOOm ) o:f bay anchovy l+ and older, based on bottom trawl PUBLIC SERVICE ELECTRIC AND GAS COMPA.~

SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-331

4-372 BAY ANCHOVY 1+ AND OLDER MAY 12-15, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO l405

~ > l405 TO 2.810 Dll > 2.810 TO 4.215 I > 4.215 TO 5.620 N

i DELAWARE Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-332

4-373

• BAY ANCHOVY 1+ AND OLDER MAY 19-22, 1980 DELAWARE RIVER ESTUARY, rkm 0--1!7 LEGEND DENSITY PER 100 CUBIC METERS 0 o.ooo 121 > 0.000 TO 10.500

~ > 10.500 TO 21.000 Ill > 21.000 TO 31.500 I * > 31.500 TO 42.000 NEW JERSEY N

i DELAWARE

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older' based on bottom trawl SALEM 316(b) STUDY . sampling, Delaware River Estuary.

Figure 4-333

4-374

.---------------~*

BAY ANCHOVY 1+ AND OLDER JUN. 2-6, 1980 DELAWARE RIVER ESTUARY, rkm 0-11'.7 LEGEND DENSITY PER 100 CUBIC METERS

o. 0.000

[2J > 0.000 TO 4.895

~ > 4.895 TO 9.790 f1!I > 9.790 TO 14.685 I > 14.685 TO lS.580 N

A I

DELAWARE 3

!Mean density (number/100m ) of. bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-334

4-375

• BAY ANCHOVY 1+ AND OLDER JUN. 9-12, 1980 DELAWARE RIVER ESTUARY, rkm 0-1f7 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 2.895

~ > 2.895 TO 5.790 Im > 5.790 TO 8.685 I > 8.685 TO 11.580 N

'I DEL.AWARE Mean density (number/lOOm ) o~ bay anchovy l+ and older, based on bottom trawl PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY sampli~g, Delaware River Estuary.

Figure 4-335

4-376 BAY ANCHOVY 1+ AND OLDER JUN. 16-20, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 IZI > 0.000 TO 3.760

~ > 3.760 TO 7.520 1111 > 7.520 TO 11.280 I > 11.280 TO 15.040 N

i DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-336

4-377

• BAY ANCHOVY 1+ AND OLDER JUL. 7-11, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENS I TY PER 100 CUB! C METERS 0 0.000

!2l > 0.000 TO 10.895 t!I > 10.895 TO 21.790

!ID > 21.790 TO 32.685 I > 32.685 TO 43.580 DELAWARE 3

Mean density (ntnnber/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-337

4-378 BAY ANCHOVY 1+ AND OLDER JUL. 14-18, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000

> 0.000 TO 10.080

> 10.080 TO 20160

> 20160 TO 30.240

> 30.240 TO 40.320 N

• I DELAWARE 3

Mean density (num.ber/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-338

4-379

• BAY ANCHOVY 1+ AND OLDER JUL. 21-25, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 4.275

~ > 4.275 TO 8.550 Ill! > 8.550 TO 12.825 I > 12.825 TO 17.100

• N

'I DELAWARE ATLANTIC OCEA..1'1 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA.,Y l+ and older, based on bottom trawl

• SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-339

4-380

~-----------------* BAY ANCHOVY 1+ AND OLDER AUG. 4-7, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 8.050

~ > 8.050 TO 16100 1111 > 16100 TO 24.150 I > 24.150 TO 32.200 N

DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMP.A.'JY 1+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-340

4-381

• BAY ANCHOVY 1+ AND OLDER AUG. 11-14, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 4.010

~ > 4.010 TO 8.020 an > 8.020 TO 12.030 I > 12.030 TO 16.040

• i N

DELAWARE

. ~ .

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY 1+ and older, based .on bottom trawl SALEM 3l6(b) STUDY . sampling, Delaware River Estuary.

Figure 4-341

4-382 BAY ANCHOVY 1+ AND OLDER AUG. 18-23, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 1.470

~ > 1.470 TO 2.940 D!I > 2.940 TO 4.410 I II > 4.410 TO 5.880 NEW JERSEY N

t

• DELAWARE ean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY + and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-342

I I

4-383

• BAY ANCHOVY 1+ AND OLDER SEP. 2-5, 1980 DELAWARE RIVER ESTUARY, rklll 0-1!7 LEGEND DENS I TY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 1.990

~ > 1.990 TO 3.980 Dll > 3.980 TO 5.970 I > 5.970 TO 7.960 N

I DELAWARE 3

Mean density (number/lOOm ) of. bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl

• . SALEM 316(b) STUDY sampling, Delaware River Estuary

• Figure 4-343

4-384 BAY ANCHOVY 1+ AND OLDER SEP. 8-12, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 3.360

~ > 3.360 TO 6.720 a > 6.720 TO 10.080 I > 10.080 TO 13.440 N

I 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-344

4-385 BAY ANCHOVY 1+ AND OLDER SEP. 22-26, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.545

~ > 0.545 TO 1090

!Ill > 1090 TO 1635 II > 1.635 TO 2180 N

'I DELAWARE Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS. COMPANY l+ and older, based on bottom trawl .

SALEM 316(b) STUDY sampling, Delaware River Estuary

• Figure 4-345

......__--~------'

4-386 BAY ANCHOVY 1+ AND OLDER SEP. 29, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 Ill > 0.000 TO 0.760

~ > 0.760 TO 1520 11!1 > 1.520 TO 2280 I > 2.280 TO 3.040 N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-346

4-387 BAY ANCHOVY 1+ AND OLDER OCT. 6-9, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.610 fit > 0.610 TO 1220 au > 1.220 TO 1.830 I > 1.830 TO 2.440 l

1* i N

I I

I DELAWARE f

I I

I ATLANTIC OCEAN

' PUBLIC SERVICE ELECTRIC AND GAS COMPANY

. 3 Mean density (number/lOOm ) of bay anchovy l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-347

4-388 BAY ANCHOVY 1+ AND OLDER OCT. 20-23, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 Ill > 0.000 TO 0.210 ti!1 > 0.210 TO 0.420 Ill > 0.420 TO 0.630 I > 0.630 TO 0.840 N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY. l+ and older, based on bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-348

4-389.

BAY ANCHOVY 1+ AND OLDER NOV. 3-7, 1980 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 Ill > 0.000 TO 0.590

~ > 0.590 TO 1180 DD > 1.180 TO 1.770 I > 1.770 TO 2.360 N

I t

J DELAWARE

~*

I l

I .- ' 3 Mean density (number/lOOm ) of bay anchovy I PUBLIC SERVICE ELECTRIC AND GAS COMPANY

. SALEM 316(b) STUDY l+ and older, based on bottom trawl sampling, Delaware River Estuary.

Figure 4-349 I

~ .

4-390 BAY ANCHOVY 1+ AND OLDER (SURFACE)

MAY 4-8, 1981 DELAWARE RIVER ESTUARY, rkm 0-lf7 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 6.770

~ > 6.770 TO 13.540 11!1 > 13.540 TO 20.310 I > 20.310 TO 27.080 N

1 t I I

DELAWARE l

~

J I

3 PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY Mean density (ntunber/lOOm ) of bay anchovy l+ and older, based on pelagic fixed-frame net sampling, Delaware River Estuary.

I Figure 4-350 I

I I

4-391

.BAY ANCHOVY 1+ AND OLDER (SURFACE)

MAY 18-22, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 6.300

~ > 6.300 TO 12.600 lBI > 12.600 TO 18.900 I > 18.900 TO 25.203 NEW JERSEY N

'I DELAWARE 3

~ean density (number/lOOm ) of. bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic .fixed-frame

• SALEM 316(b) STUDY 111et sampling, Delaware River Estuary.

Figure 4-351

4-392 BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUN. 1-5, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 8.680

~ > 8.680 TO !7.360 11!1 > !7.360 TO 26.040 I > 26.040 TO 34.720 N

t DELAWARE ATLANTIC OCEAN 3

~ean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY net sampling, Delaware River Estuary.

Figure 4-352

4-393

• BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUN. 15-19, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 7.195

~ > 7.195 TO 14.390 ll!I > 14.390 TO 21.585 I > 21585 TO 28.782 NEW JERSEY

-N i

DEL.AWARE ATLANTIC OCEAN 3 .

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 3l6(b) STUDY net sampling, Delaware River Estuary.

Figure 4-353

4-394 BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUN. 22-26, 1981 bELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.ooo 0 > 0.000 TO 9.460 IN > 9.460 TO 18.920 11D > 18.920 TO 28.380 I > 26.380 TO 37.841 N

i DELAWARE A'I'LAJ.'tTI C OCEAN 3

Mean density (number/lOOm ) ot: bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY net sampling, Delaware River Estuary.

Figure 4-354

4-395 BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUL. 6-10, 1981 DELAWARE RIVER ESTUARY, rkni 0-117 LEGEND DENS I TY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 7.955

~ > 7.955 TO 15.910 Dll > 15.910 TO 23.865

• > 23.865 TO 31.820 N

i DELAWARE Mean density (number/lOOmj) of~ bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY* l+ and older, based on pelagic fixed-frame SALEM 3l6(b) STUDY net sampling, Delaware River Estuary

• Figure 4-355

4-396 BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUL. 13-17, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 6.755

~ > 6.755 TO 13.510 Ill > 13.510 TO 20.265 II > 20.265 TO 27.024 N

t DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY net sampling, Delaware River Estuary.

Figure 4-356

4-397 BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUL. 27-30, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 4.105

~ > 4.105 TO 8210 a > 8210 TO 12.315 I > 12.315 TO 16.420 NEW JERSEY N

I DELAWARE ATLANTIC OCEAN

. . j Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY net sampling, Delaware River Estuary.

Figure 4-357

4-398 BAY ANCHOVY 1+ AND OLDER (SURFACE)

AUG. 3-6, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000

~ > 0.000 TO 5.300

~ > 5.300 TO 10.60C s > 10.600 TO 15.900 I > 15.900 TO 21.200 N

i DELAWARE ATLAJ~TIC OCEAN j

Mean density (number/lOOm ) o.f bay anchovy PUBLIC SERviCE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) SIUDY net sampling, Delaware River Estuary.

Figure 4-358

4-399 BAY ANCHOVY 1+ AND OLDER (SURFACE)

AUG. 17-22, 1981 DELAWARE RIVER ESTUARY, rkin 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 1.850

~ > 1.850 TO 3.700 nu > 3.700 TO 5.550 I > 5.550 TO 7.400

• N

• I DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY net sampling, Delaware River Estuary

• Figure 4-359

4-400 BAY ANCHOVY 1+ AND OLDER (SURFACE)

AUG. 24-27, 1981 DELAWARE RI VER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 I

0 > 0.000 TO 5.465

~ > 5.465 TO 10.930 9 > 10.930 TO 16.395 Ill > 16.395 TO 21.860 N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) o~ bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 3l6(b) STUDY net sampling, Delaware River Estuary.

Figure 4-360

4-401

• BAY ANCHOVY 1+ AND OLDER (SURFACE)

AUG. 31 - SEP. 3, 1981 DELAWARE RIVER ESTUARY, rkm 0-1!7 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 1.950

~ > 1.950 TO 3.900

~ > 3.900 TO 5.850 I > 5.850 TO 7.801

~JERSEY N

t DELAWARE ATLA.l"'{TI C OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 3l6(b) STUDY net sampling, Delaware River Estuary.

Figure 4-361

4-402 BAY ANCHOVY 1+ AND OLDER (SURFACE)

SEP. 14-18, 1981 DELAWARE RIVER ESTUARY, rkm 0-1!7 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 2.025

~ > 2.025 TO 4.050 Ill > 4.050 TO 6.075 Ill > 6.075 TO . 8.103 NEW JERSEY N

I DELAWARE ATLAl.~TIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY net samnling. Delaware River Estuarv.

Figure 4-362

4-403 BAY ANCHOVY 1+ AND OLDER (SURFACE)

SEP. 21-25, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 1.800

~ > 1.800 TO 3.600 an > 3.600 TO 5.400 I > 5.400 TO 7.200 NEW JERSEY N

i DELAWARE

. 3 Mean density. (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older*, based on pelagic fixed-frame SALEM 316(b) STUDY net sampling, Delaware River Estuary.

Figure 4-363

4-404 BAY ANCHOVY 1+ AND OLDER (SURFACE)

OCT. 5-9, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 1.240

• ~ > 1.240 TO 2.480 Im > 2.480 TO 3.720.

I > 3.720 TO 4.960.

N

• I

• DELAWARE AT"'LANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STIJDY net sampling, Delaware River Estuary.

Figure 4-364

- 4-405 BAY ANCHOVY 1+ AND OLDER (SURFACE)

OCT. 19-22, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 1615

~ > 1615 TO 323_0 Dll_ > 3230 TO 4.845 Ii > 4.845 TO 6.460

• N i

DELAWARE

-- 3 Mean density (number/100~ ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY net sampling, Delaware River Estuary.

Figure 4-365

4-406 BAY ANCHOVY 1+ AND OLDER MAY 4-8, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 0.335 riJ > 0.335 TO 0.670 11!1 > 0.670 TO 1005 I > 1.005 TO 1340 NEW JERSEY N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-366

4-407 BAY ANCHOVY 1+ AND OLDER MAY 18-22, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 l2l > 0.000 TO 0.585

~ > 0.585 TO 1.170 DD > 1.170 TO 1.755 I > 1.755 TO 2.340 N

t DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-367 I

L

4-408 BAY ANCHOVY 1+ AND OLDER JUN. 1-5, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 o.ooo' 0 > o.ooo TO 1.165

~ > 1.165 TO 2.330 DI > 2.330 TO 3.495 I > 3.495 TO 4;660 NEW JERSEY N

t DELAWARE

. 3 .

Mean density '(number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling. Delaware River Estuary.

Figure 4-368

4-409

• BAY ANCHOVY 1+ AND OLDER JUN. 15-19, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.ooo 0 > 0.000 TO 3.165

~ > *3.165 TO 6.330 DD > 6.330 TO 9.495 I > 9.495 TO 12.660 N

t DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 3l6(b) STlJDY sampling, Delaware River Estuary.

Figure 4-369

4-410 BAY ANCHOVY 1+ AND, OLDER JUN. 22-26, 1~81 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 1.640

~ > 1.640 TO 3.280 1111 > 3.280 TO 4.920 I > 4.920 TO 6.560 N

DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA..'fi' l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-370

4-411

• BAY ANCHOVY 1+ AND OLDER JUL. 6-10, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 1235

§ > l235 TO 2.470 llll > 2.470 TO 3.705 I > 3.705 TO 4.940 NEW JERSEY N

t DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sainpling, Delaware River Estuary.

Figure 4-371

4-412 BAY ANCHOVY 1+ AND OLDER JUL. 13-17, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.955

~ > 0.955 TO 1.910 s > 1.910 TO 2.865 II > 2~865 TO 3.820 N

• I DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-372

4-413

• BAY ANCHOVY 1+ AND OLDER JUL. 27-30, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 6.390

~ > 6.390 TO 12.780 DB > 12.780 TO 19.170 I > 19.170 TO 25.560 NEW JERSEY N

A I

DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-373

4-414 BAY ANCHOVY 1+ AND OLDER AUG. 3-6, 1981 DELAWARE RI VER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 12J > 0.000 TO 1.650

~ > 1.650 TO 3.300 1111 > 3.300 TO 4.950 I > 4.950 TO 6.600 N

'I DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMP.A.~ l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-374

4-415 BAY ANCHOVY 1+ AND OLDER AUG. 17-22, 1981 DELAWARE RIVER ESTUARY; rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 IZl > 0.000 TO 1360

~ > 1360 TO 2.720 lD > 2.720 TO 4.080 I > 4.080 TO 5.440 N

t DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-375

4-416

~------------~*

BAY ANCHOVY 1+ AND OLDER AUG. 24-27, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.ooo 121 > 0.000 TO 0.710

~ > 0.710 TO 1.420 llD > 1.420 TO 2.130 I > 2.130 'J'.O 2.840 NEW JERSEY N

'I

• DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY l+ and older, based' on 4.9-m bottom trawl sampling, Delaware River Estuary.

Figure 4-376

4-417 BAY ANCHOVY 1+ AND OLDER AUG. 31 - SEP. 3, 1981 DELAWARE RIVER ESTUARY, rk:rn 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 0.335 ti!! > 0.335 TO 0.670

!ID > 0.670 TO 1.005 I > 1.005 TO 1.340

• N i

DELAWARE

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA."1 l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-377

4-418 BAY ANCHOVY 1+ AND OLDER SEP. 14-18, 1981 DELAWARE RIVER ESTUARY, *rkm 0-1f7

• LEGEND DENSITY PER 100 CUBIC METERS 0 0.000

' 121 > 0.000 TO 0.565

~ > 0.565 TO 1.130 D!I > 1.130 TO 1.695 I > 1.695 TO 2.261 N

'I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy l+ and older, based on 4.9-m bottom trawl PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-378

4-419 BAY ANCHOVY 1+ AND OLDER SEP. 21-25, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.63.0

~ > 0.630 TO 1260 Gii > 1.260 TO 1.890 Ill > 1.890 TO 2.523 N

t DELAWARE ATLA.i."rn C OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-379

l 4-420

..---------------* BAY ANCHOVY 1+ AND OLDER OCT. 5-9, 1981 DELAWARE RIVER ESTUARY, rkm 0-:-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO . U40

~ > U40 TO 2.280 11!1 > 2.280 TO 3.420 Ill > 3.420 TO 4.560 N

i DELAWARE

. 3 Mean density (number/lOOm ) of bay anchovy l+ and older, based on 4~9-m bottom trawl PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-380

4-421 BAY ANCHOVY 1+ AND OLDER OCT. 19-22, 1981 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D o.ooo 0 > 0.000 TO 0.915 .

~ > 0.915 TO 1.830 11!1 > 1.830 TO 2.745 I > 2.745 TO 3.660

• N i

ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRiC AND GAS COMPA.~ l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-381

4-422 BAY ANCHOVY 1+ AND OLDER (SURFACE)

MAY 3-5, 1982 DELAWARE RIVER ESTUARY, rkin 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 IZI > 0.000 TO 23.880

~ *> 23.880 TO 47.760 Ill > 47.760 TO 71.640 I > 71.640 TO 95.524 N

DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM*316(b) STUDY trawl sampling, Delaware River Estuary.

Figure 4-382

4-423 e.-------------------. BAY ANCHOVY 1+ AND OLDER (SURFACE)

MAY 17-21, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 Ill > 0.000 TO 22.485

~ > 22.485 TO 44.970 DD > 44.970 TO 67.455 I > 67.455 TO 89.940 N

i DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic .fixed-frame SALEM 316(b) STUDY trawl sampling, Delaware River Estuary.

Figure 4-383 L

4-424 BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUN. 7-10, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 2230

~ > 2.230 TO 4.460 1!11 > 4.460 TO 6.690 I > 6.690 TO* e.920 NEW JERSEY N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on* pelagic fixed-frame SALEM 316(b) STUDY trawl sampling, Delaware River Estuary.

Figure 4.-384

4-425 BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUN. 14-17, 1982 DELAWARE RI VER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 IZI > O.OOQ TO 7.630

~ > 7.630 TO 15.260 an > 15.260 TO 22.890 I > 22.890 TO 30.520 N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older' based on pelagic fixed-frame SALEM 316(b) STUDY trawl sampling, Delaware River Estuary.

• Figure 4-385

4-426 BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUN. 28 - JUL. 3, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 12.915

~ > 12.915 TO 25.830 Im > 25.830 TO 38.745 II > 38.745 TO 51.660 NEW JERSEY N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY trawl sampling, Delaware River Estuary.

Figure 4-386

4-427 BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUL. 12-15, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 3.805

~ > 3.805 TO 7.610 DD > 7.610 TO 11.415 I > 11.415 TO 15.220 NEW JERSEY N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY trawl sampling, Delaware River Estuary.

Figure 4-387

4-428 BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUL. 19-23, 1982 DELAWARE RIVER ESTUARY, rkzn 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 2.220

~ > 2.220 TO 4.440 ll!I > 4.440 TO 6.660 I > 6.660 TO 8.880 NEW JERSEY N

t

• DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY trawl sampling, Delaware River Estuary.

Figure 4-388

4-429 BAY ANCHOVY 1+ AND OLDER (SURFACE)

JUL. 26-30, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 1.760

~ > 1.760 TO 3.520 a!l > 3.520 TO 5.280 I > 5.280 TO 7.040 N

i DELAWARE 3

Mean density (number/100m ) of bay anchovy

• PUBLIC SERVICE ELECTRIC AND GAS COMPANY SALEM 316(b) STUDY l+ and older, based on pelagic fixed-frame trawl sampling, Delaware River Estuary.

Figure 4-389

4-430 BAY ANCHOVY 1+ AND OLDER (SURFACE)

AUG. 2-5, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 0.690 Ill > 0.690 TO 1.380 DI >. 1;380 TO 2.070 I > 2.070 TO 2.760 N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY trawl sampling, Delaware River Estuary.

Figure 4-390

4-431 BAY ANCHOVY 1+. AND OLDER (SURFACE)

AUG. 16-19, 1982 DELAWARE RIVER ESTUARY, rkin 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 9.090

~ > 9.090 TO 18180 11!1 > 18180 TO ZlZlO II > Z7270 TO 36.360 NEW JERSEY N

t DELAWARE Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS CCMPA.'ff l+ and older, based on pelagic fixed-frame SALEM 3l6(b) STUDY trawl sampling, Delaware River Estuary.

Figure 4-391

4-432 BAY ANCHOVY 1+ AND OLDER (SURFACE)

AUG. 23-27, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 3.495

~ > 3.495 TO 6.990 llll > 6.990 TO 10.485 I > 10.485 TO 13.980 NEW JERSEY N

i DEL.AWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) o.f bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY trawl sampling, Delaware River Estuary.

Figure 4-392

4-433 BAY ANCHOVY 1+ AND OLDER (SURFACE)

AUG. 30 .,.._ SEP. 2, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 >. 0.000 TO 1.095

~ > 1.095 TO 2.190 11!1 > 2.190 TO 3.285 11 > 3.285 TO 4.380 NEW JERSEY

• N DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY trawl sampling, Delaware River Estuary.

Figure 4-393

4-434 BAY ANCHOVY 1+ AND OLDER (SURFACE)

SEP. 13-16, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 5.640

~ > 5.640 TO 11280 a > 11.280 TO 16.920 I > 16.920 TO 22.560 NEW JERSEY N

DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA..~ l+ and older, based on pelagic fixed-frame SALEM.316(b) STUDY traw~ sampling, Delaware River Estuary.

Figure 4-394

4-435 BAY ANCHOVY 1+ AND OLDER (SURFACE)

SEP. 27 - OCT. 1, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 3.095

~ > 3.095 TO 6.190 llD > 6.190 TO 9.285 I > 9.285 TO 12.384

• N

• I DELAWARE 3

Mean density (number/lOOm ) o~ bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMP.A.~ . l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY trawl sampling, Delaware River*Estuary.

Figure 4-395

4-436 BAY ANCHOVY 1+ AND OLDER (SURFACE)

OCT. 12-14, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 f2l > *o.ooo TO 1.815

~ > 1.815 TO 3.630 Im > 3.6:30 TO 5.445 I '> 5.445 TO 7260 N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY trawl sampling, Delaware River Estuary.

Figure 4-396

4-437 BAY ANCHOVY 1+ AND OLDER (SURFACE)

OCT. 27-29, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.620

~ > 0.620 TO 1.240 D!I > 1.240 TO l860 I .> 1.860 TO 2.480 NEW JERSEY N

i DELAWARE

-3 Mean density (number/lOOm ) o~ bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on pelagic fixed-frame SALEM 316(b) STUDY trawl sampling, Delaware River Estuary.

Figure 4-397

4-438

---

** BAY ANCHOVY 1+ AND OLDER MAY 3.-5, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 2.530 t!J > 2.530 TO 5.060 llll > 5.060 TO 7.590 I > 7.590 TO 10.120 NEW JERSEY N

'I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-398

4-439 BAY ANCHOVY 1+ AND OLDER MAY 17-21, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND .

DENSITY PER 100 CUBIC METERS D o.ooo 121 > 0.000 TO 0.670

~ > 0.670 TO 1.340 11!1 > 1.340 TO 2.010 I > 2.010 TO 2.680 DELAWARE

. j .

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl

• SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-399

4-440

..-------------------.* BAY ANCHOVY 1+ AND OLDER JUN. 7-10, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 Ill > 0.000 TO 2.525

~ > 2.525 TO 5.050

!ID > 5.050 TO 7.575 I > 7.575 TO 10.101 NEW JERSEY N

i D'ELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl.

SALEM 316(b) STUDY sampling, Delaware River Estuary. .,

Figure 4-400

4-441 BAY ANCHOVY 1+ AND OLDER JUN. 14-17; 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 f2I > 0.000 TO 1.700

§ > 1.700 TO 3.400 1111 > 3.400 TO 5.100 I > 5.100 TO 6.800 NEW JERSEY

• N i

DELAWARE

.. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-401

4-442 BAY ANCHOVY 1+ AND OLDER JUN. 28 - JUL. 3, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 1.240

~ > L240 TO 2.480 a > 2.480 TO 3.720 I > 3.720 TO 4.960 NEW JERSEY N

i DEL.AWARE 3

Mean density (number/lOOm ).of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4. 9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-402

4-443 BAY ANCHOVY 1+ AND OLDER JUL. 12-15, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 2.740

~ > 2.740 TO 5.480 11!1 > 5.480 TO 8.220 II > 8.220 TO 10.961 NEW JERSEY.

N i

DELAWARE 3

Mean density (nuritber/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STIJDY sampling, Delaware River Estuary.

Figure 4-403

4-444 BAY ANCHOVY 1+ AND OLDER JUL. 19-23, 1982 .

DELAWARE RIVER ESTUARY, rkm 0-117 .

LEGEND DENSITY PER 100 CUBIC METERS 0 0.000

12) > 0.000 TO 0.940

~ > 0.940 TO 1.880 s > 1.880 TO 2.820 I > 2.820 TO 3.760 NEW JERSEY N

i DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-404

1-4-44-5 BAY ANCHOVY 1+ AND OLDER JUL. 26-30, 1982 DELAWARE RIVER ESTUARY, rklll 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 0 > 0.000 TO 1105

~ > 1.105 TO 2210

!ID > 2.210 TO 3.315 I > 3.315 TO 4.420 NEW JERSEY N

t DELAWARE

. 3 Mean density (number/lOOm ) of bay anchovy PUBLIC .SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-405

4-446 BAY ANCHOVY 1+ AND OLDER AUG. 2-5, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 Ill > 0.000 TO 3.760 f& > 3.760 TO 7.520 llD :> 7.520 TO 11.280 I > 11.280 TO 15.040 N

'I DELAWARE 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMP.A.~ l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-406.

4-447 BAY ANCHOVY 1+ AND OLDER AUG. 16-19, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 2.025

~ > 2.025 TO 4.050 llD > 4.050 TO 6.075 I > 6.075 TO 8.100 N

t DELAWARE 3 ..

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 3l6(b) STUDY sampling, Delaware River Estuary

• Figure 4-407

4-448 BAY ANCHOVY 1+. AND OLDER AUG. 23-27, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS D 0.000 121 > 0.000 TO 2.115

~ > 2.115 TO 4230 1111 > 4230 TO 6.345 I > 6.345 TO 8.460 N

t DELAWARE

. 3 .

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPA..~

1+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-408

4-449 BAY ANCHOVY 1+ AND OLDER AUG. 30 - SEP. 2, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 0 > 0.000 TO 0.650

~ > 0.650 TO 1.300 11!1 > 1.300 TO 1.950 I > 1.950 TO 2.600 N

i DELAWARE ATLANTIC OCEAN 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older' based on 4. 9-m bottom trawl SALEM* 316(b) STUDY sam lin Delaware River Estuar *

.* . L..----------------------....1'---------F-ig_u_r_e_4_-_4o_9________________.,.

• ~*

4-450 BAY ANCHOVY 1+ AND OLDER SEP. 13-16, 1982 DELAWARE RIVE~ ESTUARY, rkin 0-117 LEGEND DENSITY PER 100 C'UBI C METERS D 0.000 121 > 0.000 TO 0.485

~ > 0.485 TO 0.970 ll!l > 0.9'70 TO 1.455 II > 1.455 TO 1.940 N

i DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 3l6(b) STUDY sampling, Delaware River Estuary.

Figure 4-410

4-451 BAY ANCHOVY 1+ AND OLDER SEP. 27 - OCT. 1, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 l2l > 0.000 TO 0.635

~ > 0.635 TO 1270 s > 1270 TO 1.905 I > 1.905 TO 2.540 NEW JERSEY N

i DELAWARE 3

Mean density (number/100m ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-411

4-452 BAY ANCHOVY 1+ AND OLDER OCT. 12-14, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000 121 > 0.000 TO 0;495

~ > 0.495 TO 0.990 Dll > 0.990 TO 1.485 II > 1.485 TO 1.980 N

t 3

Mean density (number/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY sampling, Delaware River Estuary.

Figure 4-412

4-453 BAY ANCHOVY 1+ AND OLDER OCT. 27-29, 1982 DELAWARE RIVER ESTUARY, rkm 0-117 LEGEND DENSITY PER 100 CUBIC METERS 0 0.000

- 121 > 0.000 TO 0.640

~ > 0.640 TO 1280 IHI > 1280 TO 1.920 II > 1.920 TO 2.560 i

DELAWARE 3

Mean density (nmnber/lOOm ) of bay anchovy PUBLIC SERVICE ELECTRIC AND GAS COMPANY l+ and older, based on 4.9-m bottom trawl SALEM 316(b) STUDY . . v,

~ '-----------------------.....l~--------F-ig_u_r_e_4_-_4_13________________