ML20079P332

Ecological Studies at Oyster Creek Nuclear Generating Station,Progress Rept for Sept 1981 - Aug 1982

ML20079P332
Person / Time
Site:	Oyster Creek
Issue date:	02/28/1983
From:	ECOLOGICAL ANALYSTS, INC.
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ML20079P304	List: ML20079P302 ML20079P332
References
JCP-31-A, NUDOCS 8303040587
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Text

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w Ecological Studies at Oyster Creek Xuelear Generating Station Progress Report September 1981-August 1982 Prepared for Jersey Central Power & Light Company GPU Nuclear Corporation l

lSO 000!! o!ob$k; ECOLOGICAL ANALYSTS.INC.

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EA Report JCP-31-A ECOLOGICAL STUDIES AT OYSTER CREEK NUCLEAR GENERATING STATION, PROGRESS REPORT SEPTEMBER 1981 - AUGUST 1982 i

Prepared for Jersey Central Power & Light Company GPU Nuclear Corporation Madison Avenue at Punch Bowl Road Morristown, New Jersey 07960 Prepared by Ecological Analysts, Inc.

15 Loveton Circle Sparks, Maryland 21152 February 1983

I CONTENTS Page LIST OF TABLES LIST OF FIGURES EXECUTIVE

SUMMARY

1.

INTRODUCTION 1-1 2.

fiETHODS 2-1 2.1 Impingement 2-1 2.2 Commercial Catch Data 2-1 2.3 Fish-Kill Monitoring 2-2 2.4 Water Quality Measurements 2-2 2.5 Data Processing 2-2 3.

IMPINGEMENT OF FISH AND MACR 0 INVERTEBRATES ON THE INTAKE SCREENS 3-1 3.1 Results 3-1 3.1.1 General Species Composition and Abundance 3-1 3.1.2 Occurrence and Abundance of Key Species 3-1 3.1.3 Water Quality Data Associated with Impingement Sampling 3-6 3.2 Discussion 3-6 3.2.1 Sand shrimp 3-7 3.2.2 Blue crab 3-8 3.2.3 Bay anchovy 3-9 3.2.4 Winter flounder 3-10 3.2.5 Atlantic silverside 3-10 j

3.2.6 Atlantic menhaden 3-10 3.2.7 NorJnern pipefish 3-11 3.2.8 Northern puffer 3-11 3.2.9 Weakfish 3-11 3.2.10 Bluefish 3-12 3.2.11 Summer flounder 3-12 3.2.12 Other Key Species 3-12 4.

COMMERCIAL LAh0INGS OF FINFISH AND SHELLFISH 4-1 4.1 Results 4-1 4.2 Discussion 4-1 REFERENCES APPENDIX A:

SPECIES LIST

LIST OF TABLES Number Title 3-1 Total extrapolated number, percent composition, and cumulative percent of finfish, other vertebrates, and macroinvertebrates collected from the tnveling screens at the Oyster Creek Nuclear Generating Station during 44, 24-hour sampling periods, September 1981 - August 1982.

I 3-2 Total extrapolated weight, percent composition, and cumulative percent of finfish, other vertebrates, and macroinvertebrates collected from the traveling screens at the Oyster Creek Nuclear Generating Station during 44, 24-hour sampling periods, September 1981 - August 1982.

3-3 Day-night comparisons of numbers and weights of selecM4 species collected from the Oyster Creek Nuclear Generating j

Station traveling screens, September 1981 - August 1982.

3-4 Weekly estimated number of selected species impinged on the Oyster Creek Nuclear Generating Station traveling screens, September 1981 - August 1982.

3-5 Weekly estimated weight of selected species impinged on the Oyster Creek Nuclear Generating Station traveling screens, September 1981 - August 1982.

3-6 Total estimated number and weight with 80 percent confidence intervals of key and abundant species impinged at the Oyster Creek Nuclear Generating Station, September 1981 - August 1982.

3-7 Mean water temperature values during day and night impingemen; sampling at the Oyster Creek Nuclear Generating Station, September 1981 - August 1982.

3-8

.Mean dissolved oxygen values during day and night impingement sampling at the Oyster Creek Nuclear Generating Station, September 1981 - August 1982.

3-9 Mean salinity values during day and night impingement sampling at the Oyster Creek Nuclear Generating Station, September 1981 -

August 1982.

3-10 Median pH values associated with impingement sampling at the Oyster Creek Nuclear Generating Station, September 1981 -

August 1982.

3-11 Monthly total circulating water flow through the Oyster Creek Nuclear Generating Station, September 1981 - August 1982.

l 1

l

LIST OF TABLES (CONT.)

Number Title 4-1 Total reported commercial landings and value of fin-and shellfish species taken from Atlantic County, New Jersey, September 1981 - February 1982.

4 I

4-2 Total reported commercial landings and value of fin-and shellfish species taken from Ocean County, New Jersey, September 1981 - February 1982.

4-3 C:ean County commercial landings for the period, September 1975 - February 1982.

l l

1

4 LIST OF FIGURES Number Title 1-1 Map of the middle portion of Barnegat Bay.

2-1 Diagram of the intake and discharge of the circulating water system and the dilution pumps at the Oyster Creek Nuclear Generating Station.

3-1 Estimated weekly number of fish and macroinvertebrates impinged on the Oyster Creek Nuclear Generating Station traveling screens, September 1981 - August 1982.

3-2 Estimated weekly weight of fish and macroinvertebrates impinged on the Oyster Creek Nuclear Generating Station traveling screens, September 1981 - August 1982.

3-3 Estimated annual impingement catches for total organisms and key and abundant organisms at Oyster Creek Nuclear Generating Station.

1

.]

d EXECUTIVE

SUMMARY

Aquatic monitoring was conducted at Oyster Creek Nuclear Generating Statica on Barnegat Bay, New Jersey, from September 1981 through August 1982. The program primarily consisted of sampling fish and macroinverte-brates impinged on the OCNGS traveling screens. Commercial fish landing data were compiled for Ocean and Atlantic counties, New Jersey.

Fish-kill monitoring is required, but no incidents were reported during the study period. The monitoring programs were carried out pursuant to Appendix B Oyster Creek Nuclear Generating Station Technical Specifica-tions, issued to Jersey Central Power & Light Company by the U.S. Nuclear Regulatory Commission, effective 6 June 1979 and amended September 1981.

This is the third annual progress report prepared by Ecological Analysts, Inc. to fulfill the aquatic monitoring requirements of the OCNGS Techni-cal Specifications.

Impingement collections were made for a 24-hour period cc:e each week by securing all or known portions of the screenwash from all operating screens.

Sampling yielded 424,168 specimens weighing 4,570 kilograms comprising 73 species of finfish, 26 invertebrates, one reptile, and one amphibian. The most abundant organisms in the collections were invertebrates, chiefly sand shrimp, grass shrimp, and blue crab; these crustaceans made up nearly 80 percent of the catch by number.

The bay anchovy was the most numerous finfish impinged, followed by Atlantic silverside and northern pipefish; however, together these fish species composed only eight percent of the total catch.

Based on weekly and annual estimates of numbers of key and abundant organisms impinged, catches in 1981-1982 were, in most cases, substan-tially lower than the previous year and, in some cases, among the lowest in the 7-year record. To a limited extent, the OCNGS shutdown in early 1982 and reduced pumping rates prior to and after shutdown may have con-tributed to a reduction in the annual estimates of some species.

Species that would have been affected to some extent by the shutdown are those occurring in some abundance during late winter - early spring, such as Atlantic menhaden, northern pipefish, winter flounder, and sand shrimp.

That the shutdown did not substantially affect the annual estimates of these species, however, is evidenced in the uniformity of reduced numbers of these species in fall and early winter, prior to the shutdown, when compared to the previous year. Based on both qualitative and statistical analyses described in previous annual reports, impingement on the OCNGS screens is largely a function of the abundance of organisms in Barnegat Bay. Given this premise, Bay populatons may have been of reduced size during 1981-1982, due to some unknown environmental factors.

Commercial fish landing data for the OCNGS environs were obtained from the National Marine Fisheries Service. The commercial fish landing report was based on only six months of data (September 1981 - February 1982), in contrast to previous years, because of a change in data com-pilation procedures in the National Marine Fisheries Service. Typically, landings were 10 times as great in terms of weight in Ocean County rela-tive to Atlantic County; the Ocean County dollar value was four times as great. Based on dollar value, summer flounder, hard clam, and weakfish were most important in Ocean County; the hard clam and blue crab in Atlantic County.

l

1.

INTRODUCTION This is the third in a series of annual reports prepared by Ecological Analysts, Inc. (EA) detailing results of aquatic biological monitoring conducted at the Oyster Creek Nuclear Generating Station (OCNGS) from 1 September 1981 through 31 August 1982.

The studies described herein are based on Appendix B, Oyster Creek Nuclear Generating Station Tech-nical Specifications, issued to Jersey Central Power and Light Company (JCPaL) by the U.S. Nuclear Regulatory Commission (U.S. NRC 1978),

effective 6 June 1979 and amended September 1981.

Results are presented for impingement sampling and commercial fisheries landings.

Fish-kill monitoring is required as necessary, but no fish-kills occurred during this study period.

The generating station and surrounding area were described by Danila et al. (1979), based on literature reviews and their own studies.

OCNGS is a 620-MWe boiling-water reactor, located 3.2 kilometers west of Barnegat Bay in Lacey Township, New Jersey (Figure 1-1).

Barnegat Bay is a large, shallow estuary created by offshore barrier beaches.

A limited exchange of bay and ocean water occurs through narrow Barnegat Inlet and the Manasquan Canal. During station operation, cooling water is withdrawn from Barnegat Bay through the lower part of the south branch of Forked River, then into the dredged intake canal and into the plant.

Heated water is discharged into a dredged canal and flows into lower Oyster Creek and into Barnegat Bay.

The interaction of OCNGS and Barnegat Bay has been under study since 1963 (Vouglitois 1983, personal communication).

Early preoperational studies were conducted by Rutgers University and concentrated on benthic inver-tebrates, algae, and fish. These studies continued, with the inclusion of plankton, after commercial operation of OCNGS began in December 1969; most were carried out under the auspices of either Rutgers University or the New Jersey Division of Fish, Game, and Shellfish.

The results of these studies were evaluated in the Final Environmental Statement pub-lished by the U.S. Atomic Energy Commission (U.S. AEC) in 1974.

In 1978, Jersey Central Power and Light Company produced 316(a) and (b) demonstra-tions (JCPal 1978) which evaluated the previous studies, including the first two years of aquatic monitoring studies done by Ichthyological Associates (IA 1977,1978). The IA studies continued until June 1979 when EA assumed monitoring, both as a continuation of previous programs and as the first Environmental Technical Specifications aquatic monitor-I ing. EA has continued to conduct the monnoring programs and produced two previous annual reports (Ecological Analysts 1981,1982).

In September 1981 the U.S. NRC dropped requirements for entrainment and Barnegat Bay fisheries sampling, thus these areas are not covered in the present report.

Following this introductory chapter, Chapters 2, 3, and 4 treat, in turn, field and laboratory methodologies, impingement, and commercial fisheries landings. Tabular and graphical presentations are in consecutive order at the end of each chapter. A combined reference section is presented at the end of the report.

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1 2.

METHODS 2.1 IMPINGEMENT Impingement sampling was perfomed in the sluiceway pit, an open cuboid area downstream of all intake screens, at the point in the sluiceway where the screenwash conduit leads under the adjacent roadway to the adjacent discharge area (Figure 2-1).

Samples were collected in a 101.6-cm x 101.6-cm x 121.9-cm wire basket with 10.7-mm mesh. When the larger basket was removed for snptying, a smaller. basket with identical mesh was placed in the sluiceway pit.

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Impingement collections were made over a 24-hour period once per week.

Each collection consisted of a 2-hour time period in which 1.

all organisms were collected (2-hour collection and screenwash cycle),

2.

sample duration was reduced to one hour and the number of organisms caught was doubled to represent the 2-hour period, or 3.

some fraction of organisms less than one-half were collected (continuous screenwash mode).

In the latter two cases, the total catch for the 2-hour time period was an estimate based on the ratio of the time period sampled to the entire 2-hour period.

This sampling approach was necessitated by the variation in the amount of organisms and debris encountered.

Case 1 usually held for daylight hours when organism and debris loads were relatNely light, and screens were routinely washed every two hours.

Because of greater debris and organism loads at night, the screens normally were washed once per hour.

Only one of the two screenwashes was collected in any nighttime 2-hour block (Case 2), because of the physical limitations of the sampling sys-tem. The Cace 3 approach was necessary at times when the debris load was so great that the screens were operated continuously.

At these times, attempts were made to obtain at least 1/2-hour subsamples for each 2-hour sample block.

After each sample, the catch was sorted and all organisms identified and enumerated. Also, the total weight of each species was recorded.

Subsampling of shrimp was carried out when large amounts of debris were present. Any organisms of questionable identity were preserved for subsequent laboratory examination. Records were kept of any organisms that had external parasites, disease, or morphological abnormalities.

2.2 COMMERCIAL CATCH D#TA The commercial landing data "or finfish and shellfish in Ocean County l

and Atlantic County, New Jersey, were obtained from Mr. Eugene LoVerde of the National Marine Fisheries Service office at Toms River, New Jersey.

2-1

2.3 FISH-KILL MONITORING No fish kills were reported or observed in the vicinity of the plant from September 1981 through August 1982; therefore, this aspect of the study was precluded.

2.4 WATER QUALITY MEASUREMENTS Water quality measureme7ts made in conjunction with routine biological sampling, included water temperature, pH, salinity, and dissolved oxygen (00). Measurements were made at the surface and bottom in the OCNGS intake during each impingement collection. A Yellow Springs Instrument Company (YSI) Model 57 00 meter was used to measure dissolved oxygen; the instrument was calibrated weekly before each use. Water temperature and salinity were measured with a YSI Model 33 Salinity-Conductivity-Temperature (S-C-T) meter that was calibrated semimonthly. Measurements of pH were made with a Corning 610A meter, calibrated at least once per week.

2.5 DATA PROCESSING All field and laboratory data were recorded on standard data sheets and checked for accuracy. The data were entered to computer-disk memory via a Hewlett-Packard 9830A tenninal and verified against the original data sheets. Various sumary programs then were run to reduce the data for analysis and presentation.

Annual impingement estimates were also computed on the 9830A.

The impingement sampling program at 0CNGS employed a multistage sampling design.

In the first stage, sampling days were selected once a week and these sampling days were grouped sequentially into strata so that no stratum had fewer than two sample days.

In the second stage, the sample day was partitioned into two 12-hour periods roughly representing day and night.

In a third stage, the 12-hour periods were subdivided further into six 2-hour periods.

In some cases, all fish impinged in the 2-hour period were collected and counted giving an exact count for impingement.

During periods of heavy impingement, a fourth stage was employed whereby a subinterval of the 2-hour period was sampled.

Using data collected by this sampling design, impingement estimates were computed with the following fomulas:

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j = ordinal ntsnber for sample day 2

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= length (in minutes) of block bis 1 T

= time sampled (in minutes) in block sijkl Yijkl = count of organisms for the sample collected in th the ijkl block 2-3

The estimated variance of i that was used for computing confidence intervals was computed by the fonnula (Equation 2-5) l V5r(i)= h N.

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2 ijkl Tsijkl The 80 percent confidence intervals then were computed using the normal approximation i+1.645[Vir(i)

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3.

IMPINGEMENT OF FISH AND MACR 0 INVERTEBRATES ON THE INTAKE SCREENS 3.1 RESULTS 3.1.1 General Species Composition and Abundance Impingement collections from September 1981 through August 1982 yielded 101 species of fish, invertebrates, reptiles, and amphibians. Of the total species composition, 73 species were finfish, 26 were inverte-brates, I was a reptile, and 1 an amphibian.

Eleven species constituted 95 percent of the tcial annual numerical catch from the vertical travel-ing screens (Table 3-1).

The total annual (sampling) catch all species collected during the study period was 424,168 specimens. Of this total 57,195 were fish (13.5 percent), 366,969 were invertebrates (86.5 percent), 2 were reptiles (<0.1 percent), and 7. were amphibians (<0.1 percent).

The total weight of all specimens collected during the study period was 4,570.2 kilograms. Of this total there were 1,17.9.9 kilograms (24.7 per-l cent) fish, 3,439.3 kilograms (75.2 percent) invertebrates,1.1 kilograms

(<0.1 percent) reptiles, and 0.03 kilograms (<0.1 percent) amphibians.

Eighteen taxa accounted for more than 95 percent of the total weight of the annual catch (Table 3-2).

Seasonal distribution of estimated weekly numbers and weight of organisms is illustrate" in Figures 3-1 and 3-2.

The period of maximum numerical abundance was bimodal--the first peak ranged froin mid-November to late January followed by another smaller peak from mid-April to mid-June.

No sampling occurred during the period from early February to early April when the Oyster Creek Nuclear Generating Station was not operating. The peak weekly estimate of 252,349 individuals occurred during the last week of November. The period of heaviest weekly weight estimates was from mid-May to late August with 2,020.3 kilograms impinged during the fourth week of June. Most organisms were more abundant in night samples (Table 3-3).

The total represented 84.5 percent of the overall catch.

The most abundant organism of the night impingement samples, the lady crab, Ova-lipes ocellatus, exhibited the greatest difference between numbers in the day catch (8.5 percent) and night catch (91.5 percent).

The lady crab also yielded the greatest difference in weight between day and night catches (8.5 and 91.5 percent, respectively). Relatively few organisms were more abundant in the day catches, however, the Atlantic menhaden, Brevoortia tyrannus, showed a slightly greater tendency to appear in day collections (52.8 percent by number, 47.8 percent by weight).

3.1.2 Occurrence and Abundance of Key Species The U.S. Nuclear Regulatory Commission has cefined 11 fish species and 2 invertebrates species as " Key Species" of firfish and shellfish in Barnegat Bay (U.S. NRC 1978). The designated species are:

summer flounder, winter flounder, Atlantic menhaden, Atlantic silverside, bay anchovy, bluefish, weakfish, striped bass, northern pipefish, northern patfer, northern kingfish, blue crab, and sand shrimp.

All of the 11 defined key fish species, except striped bass, were collected from the 3-1

I 1

i OCNGS screens; both key invertebrates species were collected.

The key fish species composed 73.7 percent of the fish collected from the i

l traveling screens. The two key invertebrate species accounted for 72.1 percent of the invertebrate catch by number and 66.2 percent of the catch by weight.

In addition to the abundance of each of the key species, blueback herring

( Alosa aestivalis) abundance is discussed because of this species' abun-dance on the screens (>4 percent of the total fish catch).

In discussing the key species, reference is made to weekly estimates of abundance for both numbers and weights (Tables 3-4 and 3-5, respectively). The " annual estimates" presented in Table 3-6 are not true annual estimates but are estimates for the 10-month period during which OCNGS operated.

In the presentations to follow, the use of the terms " collected" and

" sampled" refer to those specimens actually obtained in weekly 24-hour samples from the OCNGS screens. The tenns " estimate" or " estimated" imply the weekly or annual projected impingement catches.

3.1.2.1 Bay Anchovy (Anchoa mitchilli)

The bay anchovy was the most abundant fish species collected from the OCNGS screens--21,016 specimens constituted 36.7 percent of the total fish catch (5.0 percent of the total screen catch that includes inverte-brates) (Table 3-1).

Bay anchovy ranked fourth in terms of fish weight (5.7 percent of the fish catch; 1.4 percent of the total catch).

The annual estimate of number impinged for this species was 147,098; total estimated aight was 449.4 kilograms.

Two periods of maximum anchovy abundance occurred. One period extended from late September to early December 1981 and the other lasted from April through July 1982 (Table 3-4).

Maximum estimated weekly abundance (55,125 individuals) occurred during mid-April. The period of minimum estimated weekly abundance occurred from mid-December to early February at which time sampling was discontinued for a period of nine weeks due to a plant shutdown. The peak weekly estimated weight of 168.8 kilograms occurred in mid-April.

Night catches accounted for 90.6 percent of the i

annual anchovy catch by number; 91.4 percent of the total weight catch occurred at night.

3.1. 2. 7.

Atlantic Silverside (Menidia menidia)

Atlantic silverside was the second most abundant fish species collected from the screens--6,518 specimens constituted 11.4 percent of the total fish catch (1.5 percent of the total screen catch) (Table 3-1).

The species ranked 13th in terms of fish weight--25.2 kilograms composed 2.2 percent of the total fish catch (0.6 percent of the total organism cf.tch).

The annual estimate of the number impinged was 45,621 and the total estimated weight was 176.1 kilograms (Table 3-6).

The period of maximum abundance ranged from late October to early January. Another smaller peak occurred during April.

The peak estimate of weekly abun-dance occurred during the first week of December (9,184 individuals).

Periods of minimum estimated weekly abundance occurred during the months of September, June, and August. The highest weekly estimate by weight 3-2 l

J

was 41.5 kilograms during the first week of December.

Approximately 68.4 percent of the total silverside numerical catch occurred at night (71.5 percent of the total weight) (Table 3-3).

3.1.2.3 Northern Pipefish (Syngnathus fuscus)

The third most abundant fish species collected was the northern pipefish.

A total of 6,115 individuals accounted for 10.7 percent of the total fish catch on the screens and 1.4 percent of the combined fish and macroin-vertebrate catch (Table 3-1).

Northern cipefish composed 1.2 percent of the annual fish catch by weight; 13.3 kilograms were collected during the study year (Table 3-2).

The estimated annual abundance for this species was 42,799 individuals; total annual estimated weigh'. was 02.9 kilograms (Table 3-6).

Species occurrence was gredest from mid-October to mid-Decomber and again from mid-April through mid-July.

Peak estimated abundance occurred the second week of April when 8,870 individuals were estimated to have been impinged en the screens. The peak weekly estimate of impinged weight was 16.0 kilograms which caincided with the numerien1 peak during the second week of April.

Night catches of this Species accounted for 87.1 percent of the overall numerical catch and 87.6 percent of the weight.

3.1. 7. 4 Winter Flounder (Pseudopleuronectes americanus)

Winter flounder ranked fourth among fish species collected on the traveling screens--3,681 individuals composed 6.4 percent of the fish collected and 0.9 percent of the t atal organisms collected (Table 3-1).

Winter flounder ranked first in tenns of fish weight (41.9 parcent of the fish catch; 10.4 percent of the total catch). The total weight collected during the sampling year was 473.2 kilogram- (Table 3-2).

The period of maximum estimated weekly abundance for this species extended from mid-November to mid-January with the highest weekly peak both in number and weight, during the first week of January (6,963 individuals) (Table 3-4).

The estimated woight during this week was 1,169.6 kilograms.

No winter flounder were collected during most of September 1981 or from mid-July through August 1982.

A minor peak occurred in mid-June.

Night collections accour.ced for 84.2 percent of the total numerical catch for this species; 72.8 percent of the weight collected was accounted f:r by night collections (Table 3-3).

3.1.2.5 Weakfish (Cynoscion regalis)

In terms of both numbers and weight, the fifth most abundant fish species collected from OCNGS screens was the weakfish; 2,705 specimens accounted l

for 4.7 percent of the annual fish catch (0.6 percent of the total organ-ism catch) (Table 3-1).

Weakfish accounted for 4.5 percent of the total collected fish weight (1.1 percent of the total organism catch) (Table i

3-2).

Annual estimated abundance for this species was 18,925 individ-l uals; the estimated annual weight of weakfish was 355.3 kilograms.

The period of maximum abundance occurred during the months of Oc'.ober and November. The maximum weekly peak, for both number and weight, occurred during the first week of October when an estin.ated 6,689 individuals were impinged (159.7 kg). With the exception of one week in May, no weakfish were collected from early necember through July (Table 3-4).

Night 3-3

catches accounted for 79.8 percent of the total weakfish catch by) number; 78.8 percent of weakfish wei3ht was collected at night (Table 3-3.

3.1.2.6 Blueback herring (Alosa aestivalis) l Blueback herring ranked sixth in abundance in screen collections with 2,597 sps.cimens accounting for 4.5 percent of the fish collected during this study and 0.6 percent of the total organism catch. The blueback herring ranked lith in weight, contributirg 2.4 percent (27.6 kg) of the total fish catch weight (0.6 percent of the total organism weight). The annual estimated abundance and weight of this snecies in impingement collections was 18,182 individuals and 193.4 kilograms. The period of greatest abundance occurred from late November through December (Table 3-4).

A minor peak occurred in April.

The greatest estimated number impinged per week (11,081) occurred during the first week of December coincident with peak estimated weight (62.9 kg).

Blueback herring num-bers were low from late May through August 1982; none were collected in September 1981 (Table 3-4).

Night catches accounted for 85.7 (numbers) and 86.9 percent (weight) of the total catch.

3.1.?. 7 Atlantic Menhaden (Brevoortia tyrannus)

Atlantic menhade ranked ninth in impingement abundance with 1,308 speci-mens accounting for 2.3 perecnt of the total fish caught (0.3 percent of the total organism catch). This species ranked 10th in total fish bio-mass; 31.7 kilograms constituted 2.8 percent of the total fish catch (0.7 percent of the total organism catch) (Tables 3-1 and 3-2).

The annual estimated impingement abundance of menhaden was 9,155 individuals weighing 221.8 kilogra...s (Table 3-6). The period of maximum estimated abundance ranged from mid-October through the beginning of December with a peak estimated weekly abundance of 4,289 individJals (91.0 kg) in mid-October. With the exception of one week m May, no menhaden were collected from early January to mid-June (Table 3-4).

Night collections accounted for 47.2 percent of the total Atlantic menhaden catch and 52.2 percent of the total weight.

This was one of the few species to exhibit a higher number collected during the day (Table 3-3).

3.1.2.8 Bluefish (Pomatomus saltatrix)

Bluefish accounted for <1 percent of the impingement catch.

A total of 468 bluefish weighing 5.4 kilograms were collected from the traveling screens during the study (Tables 3-1 and 3-2).

The peak estimated weekly abundance (574 fish) occurred during the first week in July and another smaller peak occurred in October 1981.

None were collected between early December and mid-May. The annual estimated abundance of bluefish was i,273 individuals weighing 37.5 kilograms (Table 3-6).

Although the highest estimated numbers occurred in early July, the greatest weight (10.0 kg) was impinged in October because of the presence of heavier individual fish. Night catches accounted for 68.2 percent of the total nut.ieric catch and 59.8 percent of the total bluefish weight.

3-4

3.1.2.9 Northern Puffer (Sphoeroides maculatus)

A total of 205 northern puffer (P.Sth rank in fish abundance) were col-lected from the traveling screens during the study year. This total amounted to 0.4 percent of the annual total fish collected and 0.1 percent of the total organisms caught (Table 3-1).

The total weight of this species collected from the screens was 17.7 kilograms, accounting for 1.6 percent of total fish weight collected (0.4 percent of the total organism weight collected) (Table 3-2).

The esticated annual abundance of this species was 1,434 specimens weighing 123.6 kilograms (Table 3-6).

Northern puffer were present during the wanner months and, with the I

exception of isolated peaks in September, May, and July, when an esti-mated 200+ specimer.; were impinged, numbers were generally low (<100).

The highest weekly abundance occurred in September when 301 individuals were estimated to have been impinged. The period of maximum estimated weight (37.0 kg) however, occurred during the second week of May (Table 3-4 and 3-5).

3.1.2.10 Sumer Flounder (Paralichthys dentatus)

Summer flcunder ranked 29th in fish abundance with 145 specimens composing 0.3 percent of total fish caught (<0.1 percent of the total organism catch from the screens). The total summer flounder collected ranked ninth in fish weight; 34.8 kilograms constituted 3.1 percent of the total fish catch (0.8 percent of the total organism catch).

Annual estimated impingement abundance for this species was 1,012 individuals weighing 243.7 kilograms (Table 3-5).

The period of peak estimated weekly abundance occurred from late September through October.

No specimens were collected from mid-November to estly February while the plant was shut down. Collections from mid-April (when the plant resumed operation) through August were sporadic and generally low in summer flounder numbers.

Night catches accounted for 75.4 percent of the total numeric summer flounder catch, whereas 81.5 percent of the total catch by weight was collected at night.

3.1.2.11 Northern Kingfish (Menticirrhus saxatilis)

Only three northern kingfish were collected from the traveling screene during the study. The estimated annual rhndance of kingfish was 21 individuals weighing 0.8 kilograms (Table 3-6).

Forthern kingfish were collected dcring the last week of September 1981; the estimated abundance for that week was 21 specimens weighing an estimated 0.8 kilograms.

3.1.2.17.

Sand Shrimp (Crangon septemspinosa)

Sand shrimp was the most numerous organism collected. A total of 228,986 specimens were collected during the study period. This total accounted for 62.4 percent af the invertebrate catch (54.0 percent of the total organism catch) (Table 3-1).

The sand shrimp catch weighed 190.9 kilo-grams but accounted for only 5.6 percent of the total invertebrate catch weight (4.2 percent of the total organism catch) (Table 3-2), due to their small size. The estimated annual impingemant abundance for sand shrimp was 1,602,887 specimens weighing 1,336.5 kilograms (Table 3-6).

The period of maximum abundance ranged from November to mid-June. The 3-5

greatest estimated weekly abundance was 196,690 specimens weighing 151.8 kilograms, which occurred during the last week of May.

Night catches accounted for 91.3 percent of the total numeric catch and 91.7 percent of the total catch by weight (Table 3-3).

3.1.2.13 Blue Crab (Callinectes sapidus)

(

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Blue crab was the third most numerous organism collected. A total of j

35,496 specimens were collected during the study 4eriod.- This species composed 9.7 percent of the total invertebrate catch (8.4 percent of all collected organisms). Blue crabs ranked first in terms of weight l

(2,087.3 kg) and were 60.7 percent of the total inver'tebrate catch i

(45.7 percent of the total organism catch). The estimated annual catch was 247,108 specimens weighing 14,534.3 kilograms. ~ Blue crabs were present during the warmer months of the study period including November i

I 1981 The peak estimated neekly abundance occurred in,mid-July (29,904 individuals); the maximum estimated weight was 1,641.36 kilograms during the same week. There were no blue crabs collected frem early December to early February while the plant shut down.

Night catches accounted for 77.0 percent of the total number of blue crabs and 72.6 percent of the total weight.

3.1.3 Water Quality Data Associated with Impingement Sampling The annual mean temperature at the OCNGS intake from September 1981 to August 1982 was 15.2 C (Table 3-7).

The highest mean daily temperature recorded (29.3 C) occurred on 19 July 1982; the lowest (-0.5 C) occurred on 12 January 1982 and again on 19 January 1982.

The dissolved oxygen (00) annual mean was 8.3 mg/ liter (Table 3-8).

Mean daily values ranged from a maximum of 13.3 mg/ liter on 19 January 1982 to a minimum of 4.6 mg/ liter on 9 August 1982, following the expected l

inverse relationship with water temperature.

The lowest mean daily salinity recorded was 18.0 ppt on 19 and 26 January 1982; the highest mean reading of 27.7 ppt was recorded on 10 November ppt for bottom (Table 3-9)y readings were 23.0 ppt for surface and ?.3.3 1981. Mean annual salinit Median pH values ranged from a low of 7.6 on 6 July 1982 to a high of 8.3 that occurred occasionally from Jure to early August 1982 (Table 3-10).

3.2 DISCUSSION This discussion centers around indt sidual accounts of key and abundant species impinged at OCHGS.

Where possible, the 1981-1982 impingement of each species is placed in perspective to that of other species and compared to previous annual estches.

Because Barnegat Ray sampling was deleted from the 1981_-1982,;nonitoring program, impingement rates cannot be directly related to organism abundance in the Bay. Wherever possible, previous years' field abundance data are used to shed light on current impingement catches. 'As pertinent, the discussions of General Factors

~

3-6 1

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Affecting Impingement at OCNGS and Statistical Analysis in the last annual report (Ecological Analysts 1982) are brought to bear on the 1931-1982 impingement data.

Statistical analyse: (e.g., multiple regression model) were not applied to the 1981-1982 impingement data.

Previous attempts at statistical analysis (Ecological Analysts 1981,1982) simply confirmed intuitive observations that impingement is related primarily to the abundance of organisms in Barnegat Bay.

In general, the annual estimates of key and abundant organisms impinged at OCNGS during 1981-1982 were among the lowest recorded since 1975 (Figure 3-3).

The 1981-1982 estimate for all organisms combined was only one-quarter of the 1980-1981 estimate. This was largely the result of relatively low numbers of the nonnally very abundant blue crab and sand shrimp. With the exception of Atlanti:: menhaden and bay anchovy, all key and abundant organisms showed a substantial drop compared to the previous year. As discussed below under individual species, the 9-week shutdown of OCNGS in early 1982 had little effect on annual impingement estimates. The consistent drop in impingement catches suggests that there may have been fewer organisms in Barnegat Ray or that they were less vulnerable to impingement during the 1981-1982 study period.

This is supported by statistical analytes conducted on the 1980-1981 data (Ecological Analysts 1982) suggesting that organism abundance in Barnegat Bay was the mosc important factor affecting impingement at OCNGS.

3.2.1 Sand Shrimp (Crangon septemspinosa)

The total estimated annual impingement of 1.6 million in 1981-1982 made sand shrimp the most abundant organism collected from the OCNGS screens.

It is typically the most abundant organism impinged at CCNGS, but the 1981-1982 estimate was the second lowest to the 1976-1977 estimate. To a minor extent, the low 1981-1982 estimate may result from the nine-week j

shutdown from early February to mid-April 1982, when sand shrimp are j

relatively abundant in the Bay. However, comparison of the periods both before and after the shutdown in 1981-1982 with the same periods in 1980-1981 and 1979-1980 reveal much lower numbers in 1981-1982.

This suggests a real reduction in sand shrimp numbers in the Bay and relatively little effect of the Lhutdown on the annual estimate.

One possible factor in the lower number in 1981-1982 was the relatively severe weather conditions during winter 1982.

Surface water temperatures at OCNGS reached the freezing point on ". January (fable 3-7) and remained quite low into early February when the plant shut down.

The Bay was ice-covered for nearly a month during this period. Moore (1978) attributed low impingement catches of sand shrimp in 1976-1977, at least partly, to the severe winter of that period.

Sand shrimp apparently avoid extremely low tanperatures (Moore 1978) and an extended freeze would have kept many shrimp out of the Bay in winter 1982 and thus invul-nerable to frpingement at OCNGS.

This does not explain the scrimp's comparatively low numbers in the ilay prior to the freeze, however.

Additional unknown factors apparently reduced sand shrimp numbers throughout the 1981-1982 study year.

3-7

i 3.2.2 Rlue Crab (Callinectes sapidus)

The numbers of blue crab impinged in 1981-198?. were high compared to other organisms impinged. Only sand and grass shrimp numbers exceeded the blue creb. However, the total estimated number impinged (247,108) was the. lowest annual estimate in seven years (Figure 3-3).

The reason' i

fo.r this lowJrate must remain a matter of conjecture since comparable l

Barnegat Bay! data are not available for 1981-1982.

One possible reason for the low blue crab impingement is the severe cold weather and freeze-up of.the Bay in 1982.

Harsh winter conditions were' postulated as the reason for the dramatic reduction of olue crabs in

~

Barnegat Bay after the winter of 1976-1977 (Miller 1978; Metzger 1978).

These authors reported thousands of dead crabs in the Bay daring spring 1977 Although the cold winter of 1982 could have had some effect, it is not the entire answer because blue crab abundance on the OCNGS screens was relatively low throughout fall and early winter.

A comparison of average weekly impingement estimates from September through December for the three nost recent years clearly shows this:

M_ean Weekly Estimate Year e

1979-1980 7,152 1980-1981 15,932 1981-1982 2,355 Thus, although the cold winter of 1982 may have depressed blue crab numbers somewhat, they were already low before the onset of deep winter.

A more plausible reason for this low impingement may involve the size of crabs in the Ray in 1981-1982.

A meen weight of 58.8 grams was calculated for impinged blue crabs by dividing the total impinged weight by the total number. A comparison of this mean weight with those of the previous study years points to relatively large crabs in 1981-1982:

Year Mean Weight (g) Per Crab 1975-1976 01 1976-1977

-47.0 1977-1978 18.0 1978-1979 52.8 1979-1980 64.7 1980-1981 21.2 1981-1982 58.8 It wa' postulated previously (Ecological Analysts 1981,1982) that there s

was a relationship between the mean size of crabs impinged and the mean size in the Bay.

Further, the lower numbers of organisms impinged during years when crabs averaged larger were attributed to the lesser vulnera-bility to impingement of larger crabs. This relationship is suggested even more strongly when the 1981-1982 data are included, as in the above tabul ation. The four years with the greatest mean weights perarab (1976-1977, 1978-1979, 1979-1980, 1981-1982) yielded the lowest annual impingement catches by number (Figure 3-3).

3-8 er a

e The nine-week shutdown of OCNGS from early February into mid-April probably had little effect on the annual impingement estimate because, historically, very few crabs are impinged during this time of the year.

3.2.3 Bay Anchovy (Anchoa mitchilli)

Unlike most other key and abundant species, the annual estimate of numbers of bay anchovy impinged increased in 1981-1982 (Figure 3-3).

Although the 1981-1982 annual estimate is 70 percent as great as the previous year's estimate, it is still within the comon annual estimate range of 77,000-155,000 typical for 1976-1977 to present.

In previous reports, Ecological Analysts (1981,10#2) examined a number I

of factors that might have resulted in the dramatic decline of bay anchovy ir ta"negat Bay after the 1975-1976 study year.

It was pointed out that i r prolonged OCNGS outages occurred between May 1977 and May 1981 w

h coincided with periods of bay anchovy abundance. This undoubtedl tad some effect on the annual impirgement estimates for those yeat Hoeever, the fact that bay anchovy abundance in Rarnegat Bay seine tr/wl catches was also low during those years (relative to 1975-1976) bggests that plant outages may have been a minor determinant of annual impingement estimates.

Densities of bay anchovy larvae and juveniles were relatively low in 1980 and 1981, possibly due to competi-tive or predationai interaction with ctenophores (1980) or Atlantic silverside (1981), but this would not explain prior low impingement rates.

It was further suggested that the impact of entrainment at 0CNGS on early life stages could be a factor, since large numbers are entrained and mortality is high.

This cannot be substantiated, however, given the lack of data for bay anchovy populations outside Barnegat Ray (or in Barnegat Bay in the 1981-1982 study year). That is, since there were no comparable studies of nearby estuaries during 1975-1981, it is not clear whether the decline in the bay anchovy population is limited to Barnegat g

Bay or whether it is symptomatic of a more widespread population decline.

Whatever the cause of the decline in bay anchovy after 1975-1976, the population appears to have stabilized (Figure 3-3) insofar as impingement on the OCNGS screens can predict baywide population levels.

D' 3.2.4 Winter flounder (Pseudooleuronectes americana)

Winter flounder abundance in screen collections at OCNGS has been erratic for the seven-year study period / Figure 3-3).

The reasons were discussed at some length in previous reports (Ecological Analysts 1981, 1982) and center around plant outages at times of peak abundance. Th s was possi-bly the cause of low annual impingement rates in 1975-1976 and 1979-1980 The large catch in 1978-1979 was attrit,ated to a successful spawn two years before (Sandine et al.1978).

Notably, OCNGS continued to operate throughout the winter of 1978-1979, when adult winter flounder are abun-dant. The same is true of the 1980-1981 study year, which produced the second highest annual impingement catch of winter flounder.

The reduction in annual winter flounder impingement in 1981-1982 cannot be satisfactorily explained by the nine-week plant outage from early February to mid-April U82.

The same period in 1981 (with OCNGS 3-9

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operating) accounted for only 11 percent of the total annual impingement i

estimate for the 1980-1981 study year. Even when reduced pumping rates j

in January 1982 are considered (Table 3-11), the reduced annual impinge-ment rate is not satisfactorily explained. Because of the plant outage l

from January to May 1980, and the consequent lack of entrainment data for

(

winter flounder larvae, the 1981-1982 impingement cannot be related to the spawning success two years before. The fact that the reduction is similar to those exhibited by most other key and abundant species points to some unknown environmental factor or factors which appear to have influenced the Barnegat Ray nekton community as a whole.

3.2.5 Atlantic silverside (Menidia menidia)

Numbers of Atlantic silverside impinged during 1981-1982 were second lowest in seven years and resulted in a relatively low annual impingement estimate (Figure 3-3).

In a similar manner to the species described above, the 1982 plant shutdown for nine weeks and reduced pumping rates in January and April 1987. had little effect on numbers, perhaps reducing

(

the annual estimate by 10 or 15 percent. Neither the shutdown nor the winter freeze can be strongly implicated because silverside were rela-tively low in abundance prior to these events.

Numbers were relatively 1ow from 3eptember 1981 until plant shutdown in early February 1982.

This is evident when Table 3-4 of this report is compared to Table 4-4 in EA (1982) and Table 4-4 in EA (1981) for the 1980-1981 and 1979-1980 study years, respectively. Some combination of climatic and/or life history phenomena may have served to reduce the numbers of silverside impinged throughout the s'udy year.

3.2.6 Atlantic menhaden (Brevoortia tyrannus)

The annual impingement estimate of 9,155 in 1981-1982 for Atlantic men-haden is similar to that of the previous three years (Figure 3-3).

In a discussion of possible factors affecting impingement of Atlantic menhaden at GCMGS, Ecological Analysts (1982) concluded that abundance in the impingement collections is a reflection of abundance in Barnegat Ray.

Kurt_ (1978) related the relatively high impingement of menhaden in 1976-1977 to a large 1976 year class present in the Bay. Whatever environmental factors brought about lowered impingement rates for most other species, they appear not to have affected Atlantic menhaden.

1 3.2.7, Northern pipefish (Syngnathus fuscus)

The estimated number of northern pipefish impinged during 1981-1982 was less than half of the previous year (Figure 3-3) but nonetheless repre-sented the second highest estimate in the seven-year record. Rased on the distribution of impingement catches in 1980-1981 when OCNGS continued operation throughout the winter (Ecological Analysts 1982, Table 4-4),

as much as a 25 percent reduction in number impinged could have resulted from reduced pumping rates and the shutdown in early 1982 (Table 3-11).

However, during comparable periods of plant operation from September through December, the catch in 1981 (1981-1982 study year) was only one-half that of 1980 (1980-1981 study year). This suggests that unknown factors other than plant-operating mode acted to reduce northern pipefish impingement.

3-10

3.2.8 Northern puffer (Sphoeroides maculatus)

Just over 1,400 northern puffer were estimated to have been impinged during 1981-1982.

This rate is the same magnitude as the rates of 1975-1976, 1976-1977, 1978-1979, and 1979-1980.

Catches were dramat-ically larger in 1977-1978 and 1980-1981. These large catches were attributed to larger numbers of young of the year in the Bay (Metzger 1979; Ecological Analysts 1982). As impingement abundance is generally a reflection of field abundance, the past year's impngement results suggest continued poor population levels in Barnegat Bay.

3.2.9 Weakfish (Cynoscion regalis)

A total of 18,925 weakfish were estimated to have been impinged during 1981-1982 (Table 3-6; Figure 3-3).

This is a 60 percent reduction from the previous year's estimate.

Typically, the weakfish impinged on the OCNGS screens are young of the year that have migrated into the bay in early summer as larvae. Their rapid growth makes them vulnerable to impingement by midsummer and they continue to occur in screen collections until late fall when they migrate from the bay. Thus, neither the freeze-up nor the shutdown in winter 1982 would have reduced the number of weakfish impinged in 1981-1982.

Whatever caused the general reduction of most key and abundant species in 1981-1982 also may have affected weakfish. However, weakfish use the Bay as a nursery ground for only part of the year, and their decidedly variable abundance over the last seven years (Figure 3-3) suggests that normal cyclic trends in year-class strength may be behind their 7-year abundarce distribution.

3.2.10 Bluefish (Pomatomus saltatrix)

The bluefish, like the weakfish, uses Barnegat Bay as a nursery area.

They enter the Bay as juveniles in early summer and reach a peak in impingement collections by midsummer.

In 1981-1982, the annual impinge-ment estimate was 3,273 specimens (Table 3-6), down nearly 70 percent from the previous study year's total (Figure 3-3).

Because the study years run from 1 September through 31 August, the annual estimates illustrated in Figure 3-3 necessarily reflect the impingement of two year-classes. For example, the estimate for 1978-1979 includes fish impinged from 1 September through 31 December 1978 (the 1978 year-class) and from 1 January (actually May or June) through 31 August 1979 (the 1979 year-class).

Since the bulk of bluefish impingement occurs from late spring through late summer, each vertical bar in Figure 3-3 is primarily influered by the second-year catches, e.g., the 1979 year-class in the 1978-1979 study year.

Thus, the great-est impingement catches over the seven years were of the 1976, 1979, and 1981 year-classes.

Although this may reflect greater success of these year classes, it is not supported by the field fisheries data from Barnegat Bay from March 1977 through August 1981 (Ecological Analysts 1982, Figure 3-4).

With the exception of an unusual October 1977 peak, the seine data suggest 3-11

similar numbers of bluefish in the Bay throughout that period. Whether rhese seine data or the impingement data better reflect the actual num-bers in the Bay is unclear. Possibly, subtle differences in timing of movements or in mean size could have affected impingement, whereas Ray populations remained similar from year to year.

3.2.11 Summer flounder (Paralichthys dentatus)

Barely 1,000 summer flounder were estimated to have been impinged at OCNGS in 1981-1982 (Table 3-6) making this the lowest annual estimate in the seven-year record. This low estimate contrasts with the highest estimates of record for the two previous years.

The low catch cannot be explained by plant-operating factors, since plant pumping rates were near full capacity in October and November 1982 (Table 3-11), the normal period of peak abundance of this species. The summer flounder may have been affected by the same unknown environmental influences that reduced impingement rates of most other key and abundant species in 1981-1982.

3.2.12 Other Key Species The northern kingfish (Menticirrhus saxatilis) and striped bass (Morone saxatilis) occur only rarely in the vicinity of OCNGS (Metzger 1979).

During 1981-1982, only three northern kingfish were impinged, resulting in a total annual estimate of 21 specimens--all during the week of 29 September.

No striped bass were collected from the OCNGS screens.

The scarcity of these species continues, as indicated by 1981-1982 impingement results.

3-12

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l TABLE 3-1 TOTAL EXTRAPOLATED NUMBER, PERCENT COMPOSITION, AND CUMULATIVE PERCENT OF FINFISH, OTHER VERTEBRATES, AND MACR 0 INVERTEBRATES COLLECTED FROM THE TRAVELING SCREENS AT THE OYSTER CREEK NUCLEAR GENERATING STATION DURING 44, 24-H0VR SAMPLING PERIODS, SEPTEMBER 1981 - AUGUST 1982 Cumulative i

l Species Name Number Percent Percent Crangon septemspinosa 228,986 53.98 53.98 Palaemonetes vulgaris 72,602 17.12 71.10 Callinectes sapidus 35,496 8.37 79.47 Anchoa mitch1111 21,016 4.95 84.42 Ovalipes ocellatus 19,248 4.54 88.96 Menidia menidia 6,518 1.54 90.50 Class Scyphozoa 6,293 1.48 91.98 Syngnathus fuscus 6,115 1.44 93.42 Pseudopleuronectes americanus 3,681 0.87 94.29 l

Cynoscion regalis 2,705 0.64 94.43 Alosa aestivalis 2,597 0.61 95.54 Prionotus evolans 1,903 0.45 95.99 Etropus microstomus 1,709 0.40 96.39 Brevoortia tyrannus 1,308 0.31 96.70 Palaemonetes spp.

1,252 0.30 97.00 Cancer irroratus 1,054 0.25 97.24 Tautoga onitis 1,021 0.24 97,49 Trinectes maculatus 928 0.22 97.70 Family Xanthidae 732 0.17 97.88 Anguilla rostrata 641 0.16 98.03 Opsanus tau 626 0.15 98.18 Membras martinica 594 0.14 98.32 Apeltes quadracus 592 0.14 98.46 Mugil cephalus 534 0.13 98.58 Pomatomus saltatrix 468 0.11 98.69 Libinia dubia 409 0.10 98.79 Fundulus heteroclitus 383 0.09 08.88 Hippocampus erectus 331 0.08 98.96 Cyprinodon variegatus 301 0.07 99.03 Neooanone sayi 280 0.07 99.09 Gobiosoma bosci 272 0.06 99.16 Alosa pseudoharengus 254 0.06 99.22 Pagurus longicarpus 252 0.06 99.28 Scophthalmus aquosus 225 0.05 99.33 iaranx hippos 215 0.05 99.38 Sphoeroides maculatus 205 0.05 99.43 Strongylura marina 191 0.05 99.47 Myoxocephalus aenaeus 171 0.04 99.51 Anchoa heosetus 154 0.04 99.55 Note: See Appendix A for scientific and common name list.

TABLE 3-1 (CONT.)

Cumulative Species Name Number Percent Percent Limulus polyphemus 149 0.04 99.59 Paralichthys dentatus 145 0.03 99.62 Gasterosteus aculeatus 139 0.03 99.65 Tratogolabrus adspersus 108 0.03 99.68 Morone americana 105 0.02 99.70 Ophidion marginatum 104 0.02 99.73 Stenotomus chrysops 95 0.02 99.75 Synodus foetens 90 0.02 99.77 Peprilus triacanthus 86 0.02 99.79 Leiostomus xanthurus 65 0.02 99.81 Penaeus aztecus 63 0.01 99.82-Centropristis striata 60 0.01 99.84 Bairdiella chrysura 59 0.01 99.85 Urophycis regius 55 0.01 99.86 Astroscopus guttatus 53 0.01 99.88 Merluccius bilinearis 48 0.01 99.89 Ammodytes americanus 44 0.01 99.90 Alosa sapidissima 39 0.01 99.91 Menidia beryllina 39 0.01 99.92 Conger oceanicus 32 0.01 99.92 Phylum Nemertea 28 0.01 99.93 Panopeus herbstii 27 0.01 99.94 Fundulus majalis 24 0.01 99.94 Carcinus maenas 22 0.01 99.95 Rhithropanopeus harrisii 20 0.00 99.95 Selene vomer 18 0.00 99.96 Prionotus carolinus 15 0.00 99.96 Squilla empusa 14 0.00 99.96 Mugil curema 14 0.00 99.97 Chilomycterus schoepfi 13 0.00 99.97 Uca spp.

12 0.00 99.97 Chaetodon ocellatus 10 0.00 99.97 Callinectes similis 9

0.00 99.98 Hypsoblennius hentzi 9

0.00 99.98 Chasmodes bosquianus 8

0.00 99.98 Enneacanthus obesus 8

0.00 99.98 Dorosoma cepedianum 7

0.00 99.98 Hippolyte spp.

6 0.00 99.99 Gobiosoma ginsburgi 5

0.00 99.99 Subclass Asteroidea 5

1.00 99.99 Clupea harengus 4

0.00 99.99 Family Engraulidae 4

0.00 99.99 Pollachius virens 4

0.00 99.99 L oligo pealei 4

0.00 90.99 lolliguncula brevis 4

0.00 99.99 Alectis crinitus 4

0.00 99.99 Menticirrhus saxatilis.

3 0.00 99.99 l

l

TABLE 3-1 (CONT.)

Cumulative Species Name Number Percent Percent Sphyraena borealis 3

0.00 99.99 Lutjanus griseus 2

0.00 99.99 Urophycis chuss 2

0.00 100.00 Lucania parva 2

0.00 100.00 Menidia sp.

2 0.00 100.00 Fundulus diaphanus 2

0.00 100.00 Bufo fowleri 2

0.00 100.00 Rachycentron canadum 2

0.00 100.00 Pomotis nigromaculatus 2

0.00 100.00 Malaclemys terrapin-2 0.00 100.00 Paralichthys oblongus 2

0.00 100.00 Class Anthozoa 1

~0.00 100.00 Dasyatis sayi 1

0.00 100.00 Aluterus schoepfi 1

0.00 100.00 Polinices duplicata 1

0.00 100.00

TABLE-3-2 TOTAL EXTRAPOLATED WEIGHT, PERCENT COMPOSITION, AND CUMULATIVE PERCENT OF FINFISH, OTHER VERTEBRATES, AND MACR 0 INVERTEBRATES COLLECTED FROM THE TRAVELING SCREENS AT THE OVSTER CREEK NUCLEAR GENERATING STATION DURING 44, 24-H00R SAMPLING PERIODS SEPTEMBER 1981 - AUGUST 1982 Cumul ative Species Name Weight (kg)

Percent Percent Callinectes sapidus 2,087,335 45.67 45.67 Class Scyphozoa 632,424 13.84 59.51 Pseudopleuronectes americanus 473,155 10.35 69.86 Limulus polyphemus 202,422 4.43 74.29 Crangon septemspinosa 190,935 4.18 78.47 Ovalipes oce! latus 143,209 3.13 81.60 Cancer irroratus 95,173 2.08 83.69 Opsanus tau 75,229 1.65 85.33 6nguilla rostrata 68,962 1.51 86.84 Anchoa mitchilli 64,210 1.40

88. P.5 Cynoscion regalis 50,767 1.11 89.36 Libinia dubia 47,435 1.04 90.40 Trinectes maculatus 40,734 0.89 91.29 Tautoga onitis 38,349 0.84 92.13 Prionotus evolans 36,444 0.80 92.92 Paralichthys dentatus 34,814 0.76 93.69 Palaemonetes vulgaris 34,536 0.76 94.44 Brevoortia tyrannus 31,684 0.69 95.13 Alosa aestivalis 27,633 0.60 95.74 Scophthalmus aquosus 25,669 0.56 96.30 Menidia menidia 25,159 0.55 96.85 Mugil cephalus 20,680 0.45 97.30 Sphoeroides maculatus 17,660 0.39 97.69 Etropus microstomus 15,734 0.34 98.03 Syngnathus fuscus 13,267 0.29 98.32 Alosa pseudoharengus 9,949 0.22 98.54 Pomatomus saltatrix 5,359 0.12 98.66 Morone americana 5,169 0.11 98.77 Synodus foetens 4,973 0.11 98.88 Ophidion marginatum 4,759 0.10 98,99 Chilomycterus schoepfi 4,182 0.09 99.08 Caranx hippos 3,668 0.08 99.16 Leiostomus xanthurus 3,441 0.08 99.23 Centropristis striata 3,220 0.07 99.30 Peprilus triacanthus 2,509 0.05 99.36 Membras martinica 2,219 0.05 99.41 Astroscopus guttatus 1,965 0.04 99.45 Conger oceanicus 1,683 0.04 99.49 Hippocampus erectus 1,606 0.04 99.52 Ytenotomus chrysops 1,488 0.03 99.55 Fundulus heteroclitus 1,470 0.03 99.59 Myoxoceohalus aenaeus 1,408 0.03 99.62

TABLE 3-2 (CONT.)

f Cumulative Species Name Weight (kg)

Percent Percent Stranqylura marina 1,353 0.03 99.65 Malaclemys_ terrapin 1,056 0.02 99.67 Penaeus aztecus 969 0.02 99.69 Lgl_igo pealei 808 0.02 99.71 Prionotus carolinus 756 0.02 99.72 Neopanope sayi 703 0.02 99.74 Anchoa he)setus 701 0.02 99.76 Tautogolacrus adspersus 694 0.02 99.77 Palaemonetes spp.

680 0.01 99.79 Apeltes quadracus 663 0.01 99.80 Family Xanthidae 657 0.01

- 99.81 Ammodytes americanus 620 0.01 99.83 i

Alosa sapidissima 611 0.01 99.84 Cyprinodon variegatus 546 0.01 99.85 Pagurus longicarpus 498 0.01 99.86 Selene vomer 461 0.01 99.87 Gasterosteus aculeatus 446 0.01 99.88 Urophycis regius 434 0.01 99.89 Panopeus herbstii 428 0.01 99.90 l

Phylum Nemertea 400 0.01 99.91 Fundulus majalis 391 0.01 99.92 Dasyatis sayi 381 0.01 99.93 Bairdiella chrysura 374 0.01 99.94 Merluccius bilinearis 365 0.01 99.94 Mugil curema 311 0.01 99.95 Dorosoma cepedianum 258 0.01 99.96 Squilla emousa 245 0.01 99.96 Gobiosoma bosci 241 0.01 99.97 Pomotts nigromaculatus 200 0.00 99.97 Aluterus schoepfi 177 0.00 99.98 Hypsoblennius hentzi 141 0.00 99.98 Carcinus maenas 138 0.00 99.98 Sphyraena borealis 117 0.00 99.98 Menticirrhus saxatilis 109 0.00 99.99 Subclass Asteroidea 58 0.00 99.99 Callinectes similis 56 0.00 99.99 Polinices duplicata 53 0.00 99.99 Paralichthys oblongus 49 0.00 99.99 Chasmodes bosquianus 42 0.00 99.99 Chaetodon ocellatus 40 0.00 99.99 Lolliguncula brevis 40 0.00 99.99 Alectis crinitus 34 0.00 100.00 Menidia beryllina 33 0.00 100.00 Bufo fowleri 32 0.00 100.00 UroL1ycis chuss 30 0.00 100.00 Uca spp.

20 0.00 100.00 yhithropanooeus harrisii 18 0.00 100.00

TABLE 3-2 (CONT.)

Cumulative Species Name Weight (kg) Percent Percent Class Anthozoa 13 0.00 100.00 Fundulus diaphanus 12 0.00 100.00 E nneacanthus'obesus 10 0.00 100.00 Clupea harengus 8

0.00 100.00 Pollachius virens 8

0.00 100.00 Rachycentron canadum 8

0.00 100.00 Hippolyte spp.

6 0.00 100.00 Gobiosoma ginsburgi 5

0.00 100.00 Lutjanus griseus 5

0.00 100.00 Family Engraulidae 2

0.00 100.00 Lucania carva 2

0.00 100.00 Menidia sp.

2 0.00 100.00 l

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l TABLE 3-6 TOTAL ESTIMATED NUMBER AND WEIGHT (kg) WITH 80 PERCENT CONFIDENCE INTERVALS OF KEY AND ABUNDANT SPECIES l

l STATION, SEPTEMBER 1981-AUGUST 1982{EyERATING IMPINGED AT THE OYSTER CREEK NUCLEAR a

l Species Number Weight Blueback herring 18,182 16,452 193.43 115.80 Atlantic menhaden 9,155i6,290 221.792136.05 Bay anchovy 147,093 72,874 449.43 222.01 Atlantic silverside 45,621 14,214 176.11 70.31 Northern pipefish 42,799 10,676 92.86 20.82 Bluefish 3,273 880 37.47 6.19 Weakfish 18,925 6,514 355.7.8 163.79 Northern kingfish 21132 0.77 1.17 Summer flounder 1,012i437 243.70 127.25 Winter flounder 25,768 13,557 3,312.08 1,763.91 Northern puffer 1,434i602 123.58 70.36 Grass shrimp 508,199 119,190 241.75 48.50 Sand shrimp 1,602,887 341,347 1,336.53 277.06 Blue crab 247,108 39,262 14,534.30 2,034.70 Total (b) 2,968,519 451,119 31,930.79 4,160.41 l

t (a) Because of station outage in 1982, the " annual" estimates represent only a 10-month period.

(b) Total includes all species collected from screens.

1

TABLE 3-7 MEAN WATER-TEMPERATURE VALUES (C) DURING DAY (INTD)

AND HIGHT (INTN) IMPINGEMENT SAMPLING AT THE OYSTER CREEK NUCLEAR GENERATING STATION INTAKE, SEPTEMBER 1981 - AUGUST 1982 SU RFACE 80 MOM DJd'E IN70 INTN MEAN INTD IN TN MEAN L SEP 81 24. 3 23.6 24.0

24. 1 23.7 23.9 8 SEP 8L 23.0 23.0 23.0 22.9 23.1 23.0 14 SEP 81 23.6 23.7 23.6 23.5 23.7 23.6 22 SEP 81 20.4 L7.6 19.0 19.9 17.7 18. 8 29 3EP 81 17.1

16. L 16.6 L7. 0 16 3 L6. 6 6 OCT 8L 16.0 14. 0

15. 0

15. 7 L4. L 14. 9 14 OCT 81 12.8 12. 8 12. 8 L2.5 12. 9 L2. 7 20 OCT 81 IL.8 L3.9 12. 8 11.8 14. 0 12.9 27 OCT 8L

14. 7 L3. 9 L4. 3

14. 6

14. 1 L4. 3 3 NOV 8 L 12.5 12. 6 L2. 5 L2.5 12.7 12. 6 13 NOV 81 9.1 10. 1

9. 6

9. L 9.8

9. 5 17 NOV 81

8. 7 8.8 8.7 8.5

8. 5 8.5 2 3 NOV 81 7.1 6.L 6.6 6.7 6.1 6.4 2 D EC 8 L

9. 0

5. 8

7. 4 8.9 5.8

7. 4 9 D EC S L

3. 7 L. 6 2.7

3. 7 L. 6 2.6 15 D EC 81

1. 7 2.L

1. 9 L. 9 2.0 L. 9 2 L D EC 81 L. L

-0.4

0. 4

0. 9

-0.3 0.3 29 D EC 81

3. 4 2.5

3. 0

3. 4 2.5

3. 0 4 J AN 82

3. 4 4.9 4.1

3. 4 4.8 4.1 L2 JAN 82

-0.5

-0.0

-0. 3

-0.5

-0.3

-0.4 19 JAN 82

-0. 5 O. 0

- 0. 2

-0. 2 0.2 0.0 26 J AN 82 0.6

1. 3

0. 9 0.5

1. 3

0. 9 L F EB 82

1. 8

1. 4 L. 6 L. 6

1. 4

1. 5 14 APR 82 8.8

10. 1

9. 5 8.8

10. 1

9. 4 19 APR 82 16.4

15. 8

16. 1 16.4

15. 8 16.1 26 APR 82 14.0 16.8

15. 4 14.0 16.9

15. 4 3 MAY 82

17. 8 16.6 L7.3 17.9 16.5

17. 2 10 MAY 82 19.0 16.5 L7.8 19.0 16.6 17.8 17 MAY 82

23. 3

20. 3 21.8 23.2

20. 4 21.8 24 MAY 82 18. L

15. L 16.6 L7.7 15.0 16.4 L JUN 82 19.7

20. 2

20. 0 19.6 20.0 19.8 7 JUN 82 20. 0 17.0 L8. 5 L9.7 16.9 18.3 L4 JUN 82 23.6 18.0

20. 8 23.7 17.9 20.8 21 JUN 82 23.4 23.7 23.5 23.4 23.7 23.5 28 JUN 82 24.3

24. 1

24. 2 24.3

24. 1 24.2 6 JUL 82 24. 6 26.4 25.5 24.5 26.4 25.5 L2 JUL 82 27.3 26.6 26.9 27.2 26.5 26.9 19 JUL 82 26.6 29.5 27.9 26.5 29.2 27.9 28 JUL 82 28.3 26.0

27. 1 28.3 25.9 27.1 2 AUG 82 26.2 26.4 26.3 26.2 26.4 26.3 9 AUG 82 26.1 26.4 26.3 26.1 26.4 26.2 16 AUG 82 24. 3 23.9

24. 1 24.2 23.9

24. 0 23 AUG 82 23.5 22.0 22.8 23.5 22.0 22.7

3) AUG 82 22.7

20. 6 2L.6 22.7

20. 6 2 L. 7 M EAN

15. 5

14. 9 L5. 2 15. 4

14. 9

15. 2

TABLE 3-8 MEAN DISSOLVED OXYGEN VALUES (mg/1) DURING DAY (INTO) l AND NIGHT (INTN) IMPINGEMENT SAMPLING AT THE OYSTER CREEK NUCLEAR GENERATING STATION INTAKE, SEPTEMBER 1981 - AUGUST 1982 SJ EF ACE dOF'lD M DJIff3 LITD IJ TN

!*EAN INTD I:3TN i:EAN 1 SEP 81 6.2 6.1 6.1

5. 7 6.1

5. 9 8 SEP SL 6.4

5. 3 6.1 6.5 5.8 6.1 L4 SEP 81 6.2

6. 4 6.3 6.2 6.4 6.3 22 SEP 81

7. 8

7. 4

7. 6

7. 8

7. 4

7. 6 29 SEP 81

7. 6

7. 6

7. 6

7. 6

~.6

7. 6 6 OCT 81

8. 7

8. 2 8.5 8.7 8.2 8.5 14 OCT 81 8.9

9. 0

9. 0 8.9

8. 9

8. 9 20 OCT 81 8.8

8. 7 8.8 8.9 8.7 8.8 27 OCT 81

9. 0

0. 6 8.8 9.0

8. 6 8.8 3:10V 81 8.5

8. 6 8.5 8.4

8. 6 8.5 10 NOV 81 9.1

8. 7 8.9 9.0 8.7

8. 9 17 NCV 81 8.9

9. 3 9.1 8.9

9. 4

9. I 23 ! ICV 81

10. 2

10. 2 10.2 10.2

10. 3 1 C. 2 2 D EC B L

9. 9

10. 1 L C. 0 LO. 0 10.2 10.1 9 DEC 81 10.9 11.5 11.2 11.0 IL. 5 L 1. 2 15 D EC S 1 11.4 12. 1 LL.7 11.3 12.1 11.7 2L DEC SL 11.8 U.0 L L. 9 L 1. 8 12. 1 L 1. 9 2 9 D EC 81 12.3

12. 6 12. 4 12.3

12. 6 L2.5 4 J AN 62 10.9

10. 7 10. 8

10. 9

10. 7 10.8 12 J AN 82 12.4 12. 5 12. 4 12.4 12.5 12.4 19 JAN 82 13. 3 13. 0 L3. 1 13.3 12. 9

13. 1 26 J AN 82 12.9 12.8 12.8 12. 9 12. 5 L2. 7 1 P EB 82

12. 6 12. 5 12. 5 L2. 7 L2.5 12. 6 14 APR 82

9. 2 9.1 9.1

9. 4 9.1

9. 3 L9 APR 92

7. 8 8.3 8.L 7.7 C.4 8.1 26 APR 82 7.6

7. 0

7. 3 7.5 7.0

7. 3 3 itAY 82 8.3

7. 7 8.C 8.2

7. 6

7. 9 10 MAY 82 7.8

1. 4

7. 6

7. 8

1. 3

7. 5 d

17 F.AY 82 6.5 7.0 6.7 6.5 6.9

6. 7 28 MAY 82

7. 2

7. 0 7.1 7.3 6.9

7. 1 1 JUN 82 6.7 6.8 6.8 6.8 6.9 6.8 7 JUN 82 8.4

7. 0

7. 7 8.4

7. 0

7. 7 14 JUN 62

7. 2

7. 5

7. 3 7.1

7. 4

7. 3 21 JUN 82 6.7 6.0 6.3 6.7

5. 9

6. 3 28 JUN 82

7. 0 6.3 6.6

7. 0 6.3 6.6 6 JUL 82

7. 6

5. 5 6.5 7.6

5. 5 6.5 12 JUL 82 6.7 4.9

5. 8 6.7 4.9

5. 8 19 JUL 82 6.8 4.7

5. 7 6.8 4.7

5. 7 28 JUL 82

5. 6

6. 2

5. 9 5.6 6.3

5. 9 2 AUG 82 6.7

5. 9 6.3 6.7

5. 9 6.3 9 AUG 82 5.0 4.6

4. 8 5.0

4. 7

4. S 16 AUG 82 6.1 6.1 6.1 6.1 6.1 6.1 l

23 AUG 82 6.2

5. 5 5.8 6.2

5. 5 5.8 l

l 30 AUG 82 6.2 6.5 6.4 6.2 6.5 6.4 MEAU 8.4

8. 2 8.3 S.4 8.2 8.3 l

TABLE 3-9 MEAN SALINITY VALUES (ppt) DURING DAY (INTD) AND NIGHT (INTN) IMPINGEMENT SAMPLING AT THE OYSTER CREEK NUCLEAR GENERATING STATION INTAKE, SEPTEMBER 1981 - AUGUST 1982 SUItAC 80 MOM DME DITD IN TN MEAN IN TD IN TN MEAN 1 SEP 81 22.2 21.9 22.1 22.5 22.0 22.3 8 SEP 81 22.L 22.8 22.4 22.3 22.9 22.6 14 SEP 81 23.7 23.9 23.8 23.8 23.9 23.8 j

22 SE P 81

20. 6

20. 9 20.8 20.8 21.0 20.9

{

29 SEP 81 26.2 26.6 26.4 26.2 26.6 26.4 1

6 OCT 81 24.8 25.3 25.1 25.1 25.3 25.2 14 OCT 81 26.3 26.5 26.4 26.5 26.6 26.5 20 OCT 81 26.1 25.9 26.0 26.1 26.0

26. 0 2 7 OCT 81 25.0 26.8 25.9 25.0 26. 9 25.9 3 N CV S L 25.7

26. L 25.9 25.7

26. 2 25.9 10 Nov 81 26.7 27.7 27.2 26.7 27.5 27.1 17 NOV 81 26.A 26.0 26.4 26.6 25.8 26.2 2 3 NOV 81 25.5 25.4 25.5 25.1 25.4 25.3 2 D EC 81 24. 4 26.1 25.2 24.3 26.1 25.2 9 D EC 81 24.2 24.7 24. 4 24.2 24.7 24.5 L5 D EC 81 22.5 23.1 22.8 23.9 23.6 23.8 21 D EC 81 23.0 22.8 22.9 23.2 23.4 23.3 29 D EC 81 23.7 25.0

24. 4 24.5 25.0 24.8 4 J AN 82 22.6

20. 6 21.6 22.7 21.0 2L.8 12 J AN 82 20.2

20. 1

20. 1 24. 0 23.0 23.5 19 JAN 82

19. 3 18. 0 18.6 2L.4 22.9 22.2 26 J AN 82 22.L 18.0

20. 0 22.2 24.7 23.5 1 F EB 82

20. 3 22.4 21.3 21.2 22.4 21.8 L4 APR 82 22.9 21.9 22.4 23.0

21. 9 22.5 19 APR 82 22.4 22.9 22.7 22.4 22.9 22.7 26 APR 82 23.2 23.6 23.4 23.2 23.6 23.4 3 MAY 82 21.2 22.6 2L.8 21.2 22.6 21.8 10 MAY 82 23.9

24. 6 24.3 24.0

24. 7 24.4 17 MAY 82 23.0 23.7 23.3 23.L 23.7 23.4 24 MAY 82 20. 8 21.

2 L. 0 L. 3 21.2 21.2 l

1 JUN 82 21.5 23.S 22.7 21.5 24.0 22.8 7 JUN 82 21.7 22.0 2L.8 2L.8 22.0

21. 9 14 JUN 82

20. 5 21.0

20. 7 20.5 21.0 20.7 21 JUN 82 21.3 21.9 21.6 2L.3 21.9 21.6 28 JUN 82 22.4 21.3 21.8 22.4

21. 2 2L 3 6 JUL 82 21.5 21.3 2L. 4 21.5 21.3 21.4 12 JUL 82 20. 1

20. 1

20. 1 20.2

20. 0 20.1 L9 JUL 82 22.9 23.0 23.0 23.0 23.0 23.0 28 JUL 82 21.8 21.1 21.4 21.9 11.1 21.5 2 AUG 82 20. 3 21.1 20.7 20.4 21.1 20.8 9 AUG 82 22.8 23.1 22.9 22.8 23.1 23.0 16 AUG 82 22.0 22.4 22.2 22.0 22.4 22.2 23 AUG 82 22.8

23. 1 22.9 22.3 23.1 22.9 30 AGG 82 24. ;

24.0 24.1

24. 2 24.0 24.1 M EAN 22.9 23.1 23.0 23.L 23.5 23.3

a-1 r

4, t

4

'j j t

%l

'1 I

i, f

i TABLE 3-10 '400MN pR VAlt!ES AS?0C.W.TEP WITH IMPINGEMENT SAMPLING l

'AT THE OYSTE51 CREEW NUCLEAR GENERATING STATION INTAKE,,

'g N,

i SEPTEMBER 1981 "UGUST 19?2 s

s

([s

,\\

s

<s r

6

~

Day _

N Yisht

'3 Daily Y

3

(

Week Of Surface i Bottom 0;rf ac~e.

Bottora x Median 4

3

,5 1 SEP 81 811 *

• 8.1 A 8.0 <

8.0 8.0 8 SEP 81 7.9 8.0

, 8a A.i 8.0 8.0 '

s 14 SEP 81 8.1 b 8.0

' 8.1'.

/

8.0 8.1

/,.

\\

8.0/h'N 81 0 8.1\\

8..'F 8.1 22 SEP 81 E.2 Y

8. 2 ~ /

8'. 2

_sg 82

.8.T 29 SEP 81

~ '

N_

('

6 0CT 81

!'8.1 8.2

.. 8.2

! 3. 2 8.2 r.,/

l 14 0CT 81 18.2 8.2 8.2 8.2 < l

'8.2

/,

20 OCT 81 8.2 8.2 8.2 q J.2 8.2-I 27 OCT 81 7.9 7.9 8.1 8l'@

8.1

'()

g

<l (i

3 NOV 81 8.2 g

'B. 2 8.1 8.2 8.2 8.1 10 NOV 81 8.1 8)

( 8.1 (

8.1 j

s 7.9

/-

7.9

> -)

17 NOV 81 7.9

' 'C'7 3

\\7.9 y,,/

J1 l

23 NOV 81 8.1 8.S 8.1 a.1 e,

8.k {;, {8.1

,y g

2 DEC 81 8.0

• 8. 0 i

\\,

8.1

,/

7.9\\

7.9

,'t

/ 7.9

//

9 DEC 81 8.0 8.0 15 DEC 81 7.9 7.8 7.9 (

7.8 7.8 i

U, ~

8. 0 7.9 7.9 21 DEC 81

7. 8 <.

.,' 7.8 7.9 8.0 29 DEC 81 8.0 8:0" 80

,', i ~ /

t 4 JAN 82 7.9

? 7.4%, s.,

7.7 7.7 7.8 j

12 JAN 82 7.8 7.'d n 7.8 7.9 '

7.8 19 JAN 82 7.8 7.7 7.7 7.7 7.7 k' 8.0 7.7 s L'/

8.0 7.9

'l 26 JAN 82 7.9 S

^,'

m 1 FEB 82

- 8.0 8.0

's

- t

, L::

8.0 '

S ' 8.0 2 8.0 5 s

14 APR 82 8.0

-8.1 Q).

8.'0 m

, 8. 0

',/

8.1 l

.x 19 APR 82 8.0 8.0 l, 8.0 8.0

't 8.0 26 APR 82 7.9

.7.9,

'\\

7.9 4

7.9

] 7.9N m

2 '

,,(,

3.0 N

.i

\\' (8.lc 8.0

,8}0 s

3 MAY 82 8.0

'\\

.s 10 MAY 82 8.0" 8.E,*

' I " 8. 0 8.1

'8.0 8.0 17 MAY 82 7.9 7.9

. \\ ' 8.0 8.0

+

s 7.7 '

(a 7.7 ).

, X 7. 7

7.7

/

24 MAY 82 7.6,

)

~G) a s

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1 2

TABLE 3-10 (CONT.)

Day

'Jight Daily

_ Week Of Surface Bottom Surface Bottom Median 1 JUN 82 8.0 8.1 8.3 8.3 8.1 7 JUN 82 8.0 8.1 7.9 8.0 8.0 14 JUN 82 8.0 7.9 8.0 8.0 8.0 21 JUN 82 8.0 8.0 7.9 7.8 7.9 28 JUN 82 7.9 7.8 7.8 7.8 7.9 6 JUL 82 8.2 8.3 7.9 7.6 8.0 I

12 JUL 82 8.3 8.0 8.0 7.8 8.0 19 JUL 82 8.2 8.3 7.9 7.9 7.9 28 JUL 82 7.8 7.6 8.2 8.2 8.0 2 AUG 82 8.3 8.0 8.1 S.1 8.1 9 AUG 82 (a)

(a) 7.9 (a) 7.9 16 AUG 82 8.0 8.0 8.0 8.0 8.0 23 AUG 82 8.1 8.1 7.9 7.7 7.9 30 AUG 82 7.9 8.0 7.9 7.9 7.9 (a) No data due to instrument malfunction.

l l

-6 (c

l

'i L. -

i l

i TABLE 3-11 MONTHLY TOTAL CIRCULATING WATER FLOW THROUGH

~

I j

THE OYSTER CREEK NUCLEAR GENERATING STATION INTAKE, SEPTEMBER 1981 - AUGUST 1982 s

~

/

e

, Month Ecw-(litersx10) t

/

SEP 81 3,759

'~

OCT 81 6,671 NOV 81 4

T7,518

'es

..r -

DEC 81 6,781

.s ',

'e' JAN 82 4,569 FEB 82 1

983 MAR 82 S

0 APR 82 4,218 MAY 82 6,190 JUN'82 7,466 JUL 82 7,772

,4 AUG 82 7,264 Maximummonthly'bmpingcapacityranges.frbm

' Note:

p 7,017 to 7,769 liters x 10, depending 4cn number of days in month.

l

\\

4.

COMMERCIAL LANDINGS OF FINFISH AND SHELLFISH Commercial landing data for Ocean and Atlantic counties, New Jersey, are presented and discussed; landing data specific to Barnegat Bay are no longer compiled by the National Marine Fishery Service (NMFS), but Barnegat Bay is entirely within Ocean County.

Six months of data are presented covering the period September 1981 through February 1982.

(As of 14 December 1982 the NMFS had not tabulated fish landings through August 1982).

4.1 RESULTS Data for eight finfish species and two shellfish species are presented in Tables 4-1 and 4-2.

The combined landings for both counties totaled 1.0 million kilograms valued at over 1.8 million dollars.

Both total landings and dollar values were greater in Ocean County. The Ocean County landings were about 9.3 times Atlantic County's and the dollar value was about 4.2 times as great.

Summer flounder produced both the greatest weight and highest dollar value of any species in Ocean County. Bluefish yielded the next greatest weight, but ranked only tourth in value. Weakfish ranked third in both weight and value. Hard clam meats were fourth in weight but second in dollar value, although that value was only about half of the high-valued summer flounder. The blue crab ranked fifth in both weight and value.

In Atlantic County, hard clam meats, blue crab, summer flounder, American eel, and winter flounder ranked first through fifth, respectively, in both weight and value.

4.2 b!SCUSSION In both Ocean and Atlantic counties, the landings were greater during summer and early fall months (Tables 4-1 and 4-2) with the exception of the summer flounder which is trawled offshore throughout the winter.

This reflects decreased availability of most species in winter and I'

spring, coupled with a probable r?ouced tishing effort.

As already noted, commercial landings from Barnegat Bay are no longer compiled separately. The Barnegat Bay catches are reported in the Ocean County landing and for some species Ocean County data are partly or entirely maae up of Barnegat Bay catches.

Swider (1978) and Hillman (1977) reported Barnegat Bay percent contributions to Ocean County landings from the period September 1975 - August 1977:

al ewife,41-100 percent; American eel, 46-47 percent; winter flounder, 30-63 percent; white perch,98-100 percent; blue crab,100 percent; and hard clam meats, l

30-36 percent. The Ocean County landings of bluefish, weakfish, and summer flounder are from outside Barnegat Bay (Boyle 1979).

Considering a' canmercial species tooether, total landed weights were rather consistent from year to year (Table 4-3).

The largest total was produced during 1978-1979 (1.6 million kg) and smallest (1.2 million kg) in 1979-1980. Only half of the 1981-1982 landings are reported and, when 4-1

l the additional six months data are available, the annual totals could i

exceed the high catch of 1978-1979.

I Although total landings were relatively consistent from year to year, some individual species exhibited significant year-to-year fluctuations.

The Ocean County bluefish landings increased consistently from 156,497 l

kilograms in 1975-1976 to 245,935 kilograms in 1980-1981.

This trend may I

continue when the March - August 1982 data on bluefish are added to the 145,209 kilograms already reported.

Sumer flounder landings decreased by 40 percent from 1976-1977 to 1979-1980, but have continued to increase at a rapid rate since 1980-1981. Weakfish landings fluctuated dramati-cally with year-to-year totals two to three times as high (or low) as the previous year. Weakfish landings are highest from April through August and without these data a valid 1981-1982 estimate is impossible.

White perch catches were relatively high in 1975-1976 (18,611 kg) and in 1978-1979 (16,507 kg), whereas all other years produced <5,000 kilograms.

Because blue crab landings are highest from June through October, and data are not yet available for part of this period in 1982, an accurate'

'i annual estimate is impossible. Hard clam landings fluctuated also, with the highest annual total in 1978-1979 and the lowest in 1979-1980 (a 3-fold decrease). The 1981-1982 hard clam landings appw low based on six months data and may ultimately be similar to the low landings of 1979-1980.

The Technical Specifications require a comparison of commercial landing data with OCNGS impingement data for key species of fin-and shellfish.

Such a detailed comparison was provided in the last annual report (Ecological Analysts 1982) and covered the 1975-1976 through 1980-1981 study years. That comarison showed little relation between commercial landings of key species and impingement rates at OCNGS.

The study does not preclude some effect of impingement on certain species, but it did strongly suggest that any evidence for such effects may not be found in the commercial catch data.

l Because of a chang in data compilation procedures at the National Marine Fisheries Service, only the first six months of the normal 12-month data set are available at this time. Aside from insights gained from the first six months of data, a full compilation and discussion of the September 1981 - August 1982 commercial landing data must await the next annual progress report.

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REFERENCES i

Boyl e, M.F.

1979.

Commercial fisheries, in Ecological Studies for the Oyster Creek Generating Station.

Progress Report for the Period September 1977 - August 1978 (D.J. Danila and C.B. Milstein and Associates, eds.), pp. 88-89.

Ichthyological Associates, Inc.

Ithaca, N.Y.

Danila, D.J., C.B. Milstein, and Associates, eds.

1979.

Ecological Studies for the Oyster Creek Generating Station.

Progress Report for the Period September 1977 - August 1978.

Ichthyological Associates, Inc., Ithaca, N.Y.

Ecological Analysts, Inc.

1982.

Ecological Studies at Oyster Creek Nuclear Generating Statio, Progress Report, September 1980 -

August 1981. EA, Sparks, Fn..

Ecological Analysts, Inc.

1981.

Ecological Studies at Oyster Creek Nuclear Genera. ting Station, Progress Report, September 1979 - August 1980.

EA, Sparks, MD.

Hillman, R.J.

1977a. Commercial fisheries, i_n Ecological Studies for the Oyster Creek Generating Station.

Progress Report for the Period September 1975 - August 1976.

Vol. 1.

Fin-and Shellfish (T.R. Tatham, D.J. Danile, D.L. Thomas, and Associates, eds ),

pp. 143-145.

Ichthyological Associates, Inc., Ithaca, N.Y.

Ichthyological Associates.

1977.

Ecological Studies for the Oyster Creek Generating Station, Vols. I and 2.

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IA, Ithaca, N.Y.

Ichthyological Associates.

1978.

Ecological Studies for the Oyster Creek Generating Station, Vols. 1 and 2.

Progress Report for the period September 1976 - August 1977 (T.R. Tatham, D.J. Danila, and 0.L. Thomas, eds.).

IA, Ithaca, N.Y.

Jersey Central Power & Light Company.

1975.

316(a) and (b) demonstra-tion for the Oyster Creek and Forked River Nuclear Gene %'g Stations.

JCP&L, Morristown, N.J.

w tz, R.J.

1978.

Atlantic menhaden, i'n Ecological Studies for the Oyster Creek Generating Station.

Progress Report for the Period September 1976 - August 1977, Vol.1.

Fin-and Shellfish (T.R. Tatham, D.J. Danila, D.L. Thomas, and Associates, eds.), pp. 144-156.

Ichthyo-logical Associates, Inc., Ithaca, N.Y.

Metzger, F., Jr.

1970 Blue crab, i_n Ecological Studies for the Oyster Creek Generacing Station-Progress Report for the Period September 1976 - August 1977 (D.J. Danila and C.B. Milstein, eds.), pp. 251-258.

Ichthyological Associates, Inc., Ithaca, N.Y.

Metzger, F., Jr.

1979. Life history studies, i_n Ecological Studies for j

the Oyster Creek Generating Station.

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pp. 69-87.

Ichthyological Associates, Inc., Ithaca, N.Y.

Miller, G.J.

1978.

Impingement of fishes and macroinvertebrates on the traveling screens, i'n Ecological Studies for the Oyster Creek Generat-ing Station. Progres's Report for the Period September 1976 - August 1977, Vol.1:

Fin-and Shellfish (T.R. Tatham, D.J. Danila, and D.L. Thomas, eds.), pp. 16-52.

Ichthyo'ogical Associates, Inc.,

Ithaca, % Y.

Moore, D.W.

1978. Sand shHmp, i'n Ecological Studies for the Oyster Creek Generating nation.

Progress Report for the Period September 1976 - August 1977 (T.R. Tatham, D.J. Danila, and D.L. Thomas, eds.),

pp. 242-250.

Ichthyological Associates, Inc., Ithaca, N.Y.

Sandine, P.H., R.P. Smith, and F.A. Swiecicki.

1978.

Entrainment of i'n Ecological Studies organisms through the OCGS cooling-water system, TReport for the fer the Oyster Creek Generating Station.

Prcgres Period September 1976 - August 1977, Vol. 2:

P1ankton (T.E. Tatham, P.H. Sandine, R P. Smith, K.A. Tighe, F.A. Swiecicki, and D.L. Thomas, eds.), pp. 4-50.

Ichthyological Ass 9ciates, Inc., Ithaca, N.Y.

Swider, G.L.

1978.

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Fin-and S:lellfish (T.R. Tatham, D.J. Danila, and D.L. Thomas, eds.),

pp. 269-273.

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t Tatham, T.R., D.L. Thomas, and G.L. Miller.

1978.

Survival of fishes l

and macroinvertebrates impinged at Oyster Creek Generating Station, i'n Fourth National Workshop on Entrainment and Impingement (L.D. Jensen7 ed.), pp. 235-243.

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N

APPENDIX A:

SPECIES LIST s

TABLE A-1 SCIENTIFIC AND COMMON NAMES OF FISHES, REPTILES, AMPHIBIANS AND INVERTEBRATES ENCOUNTERED DURING IMPINGEMENT SAMPLING, SEPTEMBER 1981 - AUGUST 1982 Scientific Name Common Name FISH:

Dasyatis sayi Bluntnose stingray Anguilla rostrata American eel Conger oceanicus Conger eel Alosa aes'tivalis Blueback herring Alosa pseudoharengus Al ewife Alosa sapidissiraa American shad Brevoortia tyrannus Atlantic menhaden Clupea h. harengus Atlantic herring

~

Dorosoma cepedianum Gizzard shad Anchoa hepsetus Striped anchovy Anchoa mitchilli Ray anchovy Family Engraulidae Anchovies Synodus foetens Inshore lizardfish Opsanus tau Oyster toadfish Merluccius bilinearis Silver hake Pollachius virens Pollack Ilrophycis chuss Red hake Urophycis regia Spotted hake

(= U. regius)

Ophidion marginatum Striped cusk-eel Strongylura marina Atlantic needlefish Cyprinodon variegatus Sheepshead minnow Fundulus diaphanus Banded killifish Fundulus heteroclitus Mummichog Fundulus majalis Striped killifish Lucania parva Rainwater killifish Membras martinica Rough silverside Menidia beryllina Tidewater silverside Menidia menidia Atlantic silverside Apeltes quadracus Fourspine stickleback Gasterosteus aculeatus Threespine stickleback Hippocampus erectus Linad seahorse Syngnathus fuscus Northern pipefish Morone americana White perch Centropristis striata Black sea bus Enneacantnus obesus Banded sunfish l

Pomatomus saltatrix Bluefish Rachycentron canadum Cobia

~ TABLE A-1 (CONT.)

Scientific Name Comon Name Alectis ciliaris African pompano

(= A_. crinitus)

Caranx hippos Crevalle jack Selene vomer Lookdown Lutjanus griseus Gray snapper Stenotomus chrysnps Scup Rairdiella chrysur'a Silver perch Cynoscion regalis Weakfish Leiostomus xanthurus Spot Menticirrhus saxatilis Northern kingfish Chaetodon ocellatus Spotfin butterflyfish l

Tautoga onitis Tautog Tautogolabrus adspersus Cunner Mugil cephalus Striped mullet Mugil curema White mullet

_Sphyraena borealis Northern sennet Astroscopus guttatus Northern stargazer Chasmodes bosquianus Striped blenny Hypsoblennius hentz1 Feather blenny Amodytes americanus American sand lance Gobiosoma bosci Naked goby Gobiosoma ginsburgi Seaboard goby Peprilus triacanthus Rutterfish Prionotus carolinus Northern searobin Prionotus evolans Striped searobin Myoxocephalus aenaeus Grubby Etropus microstomus Smallmouth flounder Paralichthys dentatus Sumer flounder Paralichthys oblongus Fourspot flounder Scophthalmus aquosus Windowpene Pseudopleuronectes americarus Winter flounder Trinectes maculatus Hogchoker Aluterus schoepfi Orange filefish Sphoeroides m_aculatus Northern puffer Chilomycterus schoepfi Striped burrfish REPTILES:

Malaclemys terrapin Diamondback terrapin AMPHIBIANS:

Rufo fowleri Fowler's toad INVERTERRATES:

Class Scyphozoa True jellyfishes Class Anthozoa Corals and sea anemones Phylum Nemertea Ribbon worms

4 TABLE A-1 (CONT.)

Scientific Name Common Name Polinices duplicatus Moon snail Loligo penlei Squid Lolliguncula brevis Squid Limulus polyphemus Horseshoe crab Squilla empusa Mantis shrimp Tenaeus aztecus Brown shrimp Palaemonetes vulgaris Grass shrimp Hippolyte sp.

Caridean shrimp Crangon septemspinosa Sand shrimp Pagurus longicarpus long-armed hermit crab Callinectes sapidus Blue crab Callinectes similis Lesser blue crab Ovalipes ocellatus Lady crab Carminus maenas Green crab Cancer irroratus Rock crab Family Xanthidae Mud crabs Neopanope texana sayi Mud crab Panopeus herbstii Mud crab Rhithropanopeus harrisii Mud crab Libinia,dubia Spider crab tica spp.

Fiddler crab Subclass Asteroidea Start'ish

_.