ML061880221
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| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 05/15/2005 |
| From: | Normandeau Associates |
| To: | Entergy Nuclear Vermont Yankee, Office of Nuclear Reactor Regulation |
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Text
AQUATIC ECOLOGY IV.M.(p). Normandeau Associates, Inc. 2005
VERMONT YANKEE/CONNECTICUT RIVER SYSTEM ANALYTICAL BULLETIN 82 ABUNDANCE OF JUVENILE AMERICAN SHAD IN THE VERNON POOL DURING 2004 MAY 2005
VERMONT YANKEE/CONNECTICUT RIVER SYSTEM ANALYTICAL BULLETIN 82 ABUNDANCE OF JUVENILE AMERICAN SHAD IN THE VERNON POOL DURING 2004 Prepared for ENTERGY NUCLEAR VERMONT YANKEE, LLC 320 Governor Hunt Road Vernon, Vermont 05354 Prepared by NORMANDEAU ASSOCIATES, INC.
25 Nashua Road Bedford, NH 03110 R-18980.042 May 2005
N NORMANDEA U ASSOCIATES INC.
TABLE OF CONTENTS Page A BSTRA CT...........................................................................................................................................
I 1.0 IN TRO D U CTION........................................................................................................................
2 2.0 M A TERIA LS AN D M ETH O D S............................................................................................
3 2.1 Study A rea...........................................................................................................................
3 2.2 Sam pling D esign.........................................................................................................
3 2.3 B each Seine Survey........................................................................................................
4 2.4 A nalytical M ethods........................................................................................................
4 3.0 R ESU LTS.....................................................................................................................................
6 3.1 Sam pling Effort.........................................................................................................
6 3.2 Catch and Species Com position.....................................................................................
6 3.2 Catch Per U nit Effort (C PU E)........................................................................................
7 4.0 D ISC U SSION...............................................................................................................................
8 5.0 LITERA TU RE C ITED..........................................................................................................
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List of Figures Page Figure 1.
Vernon Pool Study Area of the Connecticut River, Vernon to Brattleboro, VT........ 13 Figure 2a.
Juvenile American Shad Study, Connecticut River, Vernon to Brattleboro, VT.....
14 Figure 2b.
Juvenile American Shad Study, Connecticut River, Vernon to Brattleboro, VT.....
15 Figure 2c.
Juvenile American Shad Study, Connecticut River, Vernon to Brattleboro, VT.....
16 Figure 2d.
Juvenile American Shad Study, Connecticut River, Vernon to Brattleboro, VT........ 17 Figure 3.
Weekly Length-Frequency of Juvenile American Shad Caught by Seine in Vernon Pool of the Connecticut River, July - October 2004....................................................
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List of Tables Page Table 1.
Area (Square Meters) of Sampling Regions and Weighting Factors Used to Calculate the Standing Crop Index for Juvenile American Shad in Vernon Pool of the Connecticut River, July - October 2004..........................................................................
19 Table 2.
Station Names and Latitude/Longitude Coordinates for Beach Seine Samples in Vernon Pool of the Connecticut River, July - October 2004..........................................
20 Table 3.
Checklist of Fishes (Nelson et al. 2004) Collected by the Beach Seine Survey In Vernon Pool of the Connecticut River During 2004.......................................................
23 Table 4.
Weekly and Regional Number of Fish Caught by Beach Seine in Vernon Pool of the Connecticut River, July - October 2004..........................................................................
24 Table 5.
Weekly and Regional Mean Catch Per Unit of Effort (CPUE) by Beach Seine in Vernon Pool of the Connecticut River, July - October 2004...........................................
27 Table 6.
Beach Seine Standing Crop Index (and Standard Error, SE) for Juvenile American Shad in Vernon Pool Regions of the Connecticut River, July - October 2004................ 44 Table 7.
Comparison Standing Crop Index of Juvenile American Shad Abundance among Vernon Pool Regions of the Connecticut River during July - October 2000-2004.....
45 Table 8.
Annual Juvenile American Shad Standing Crop Index and the Estimated Number of Adult Shad in Vernon Pool of the Connecticut River, 2000 through 2004.....................
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ABSTRACT A fifth year of sampling was conducted to estimate an index of abundance ofjuvenile American shad and other fish taxa found in Vernon Pool of the Connecticut River (between Vernon and Brattleboro, VT) during July through October 2004. The program began during 2000 and was continued during 2001 through 2003 using the same sampling design, gear and deployment techniques. A 30.5 m (100 ft.) beach seine was deployed to sample the shore zone (water less than 3 m [10 ft.] deep) during the day, and a 1.8 m x 1.2 m (6 ft. x 4 ft.) midwater trawl was used to sample pelagic waters (greater than 3 m [10 ft.] deep) at night. Twenty randomly selected beaches were sampled with the seine and twelve randomly selected midwater trawl tows were taken during each of eight surveys scheduled on alternating weeks in each year 2000 through 2003. The midwater trawl program was discontinued in 2004 because it has been ineffective in capturing juvenile shad in the pelagic zone of Vernon Pool during each of the previous four surveys. Instead, an extra 12 beach seine samples were collected in each of the eight surveys scheduled during 2004 to replace the sampling effort lost by terminating the midwater trawl program. The catch of fish in each sample was identified to species, enumerated, and measured. The beach seine survey caught an annual total of 3125 fish in Vernon Pool during 2004, and the catch comprised 16 fish taxa. Bluegill (1208 fish), black crappie (566 fish), yellow perch (451 fish), and golden shiner (393 fish) were the most abundant fish species caught by seines, collectively comprising 84% of the total seine catch in 2004. Juvenile American shad ranked seventh in abundance (82 fish) among the 16 fish species caught by seines during 2004. The juvenile American shad were caught in the two surveys in August (8-14 August and 21-28 August), one survey in early September (5-11 September), and the first survey in October 2004 (3-9 October).
Juvenile American shad were primarily caught in the Vernon Region during the two surveys in August (23 fish and 16 fish) and during the first survey in October (39 fish), but the Brattleboro Region (I fish during 5-11 September) and Cersosimo Region (2 fish during 8-14 August) also contributed fish during the 2004. The mean length of the 25 American shad caught by seine during the week of 8-14 August 2004 was 75 mm total length (S.E. = 1.0 mm), the mean length of the 16 American shad caught by seine during the week of 21-28 August 2004 was 86 mm total length (S.E.
= 1.4 mm), the mean length of the 2 American shad caught by seine during the week of 5-1 1 September 2004 was 86 mm total length (S.E. = 8.5 mm), and the mean length of the 39 American shad caught by seine during the week of 3-9 October 2004 was 95 mm total length (S.E. = 0.9 mm).
The difference in mean lengths between first and last collection weeks suggest that juvenile American shad in Vernon Pool exhibited a growth rate of about 2.5 mm per week during 2004. When the weekly mean catch/seine haul of American shad were weighted by the area of beach habitat in each region and summed across regions, the resulting combined standing crop index ofjuvenile American shad abundance in Vernon Pool was between 0 fish and 7915 fish among the eight survey weeks of 2004. The average of the eight weekly standing crops produced a combined standing crop index of 2066 juvenile American shad in Vernon Pool during 2004. This 2004 index was highly variable among weeks and regions, with a standard error of +2041 fish. The juvenile American shad standing crop index of 2066 fish for Vernon Pool in 2004 was intermediate among the five-year annual time series of index values (31,244 fish in 2000, 2433 fish in 2001, 10,528 fish in 2002, and 723 fish in 2003).
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1.0 INTRODUCTION
One of the stated objectives by the Shad Studies Subcommittee of the Connecticut River Atlantic Salmon Commission in " A Management Plan for American Shad in the Connecticut River Basin" (prepared February 1992) is that population monitoring is required to support the achievement of the management goal of sustaining 1.5 to 2 million shad in the Connecticut River system. Entergy Nuclear Vermont Yankee LLC (Vermont Yankee) has participated in the long-term population monitoring in previous years (e.g., Vermont Yankee Analytical Bulletin Nos. 40, 42, and 71), and in 1997 agreed to evaluate beach seining and electrofishing at locations that could be used to develop a juvenile shad index of relative abundance (Normandeau 1998, Bulletin No. 71). Sampling via electrofishing and beach seine continued in 1998 and 1999 (Normandeau 1999, Bulletin No. 73; Normandeau 2000, Bulletin No. 75).
The juvenile shad program first conducted during 2000 was significantly modified and expanded from the 1999 and previous programs (Normandeau 2001, Bulletin No. 76). Based on three consecutive years of effort with little success (1997, 1998, and 1999), electrofishing for young-of-the-year (YOY orjuvenile) shad was judged ineffective and was not conducted above the Vernon Dam in 2000. Furthermore, beach seine sampling in the West River near Brattleboro, VT (Retreat Meadows) was not conducted in 2000 because efforts in 1998 and 1999 failed to capture any YOY shad (Normandeau 2000, Bulletin No. 75). Cost savings from these changes and from terminating monthly fish sampling with trap nets in the Connecticut River to provide protection for bald eagles nesting in our sampling area allowed for an expansion of fishing effort for YOY shad in the 2000 study. The sampling design conducted during July through October 2000 replaced approximately 7 beach seine samples and electrofishing samples collected twice per month with a standard design of 20 beach seine samples and 12 midwater trawl samples collected twice per month at randomly selected locations.
The sampling design first implemented in 2000, and continued in 2001 through 2003, obtained sufficient data to calculate ajuvenile shad index of relative abundance in Vernon Pool for all four years (Normandeau 2001, 2002, 2003 and 2004a; Bulletins No. 76, 78, 79, and 81). The abundance index for Vernon Pool was defined in terms of the mean catch per unit of effort (CPUE) and standing crop ofjuvenile shad collected in bimonthly samples from a set of randomly selected sampling stations during a consistent time period (July through October) and region (Vernon Dam upstream for 11.6 km [7.2 mi.] to the confluence with the West River). The sampling design for Vernon Pool was similar to one used to estimate forjuvenile shad year class strength in the lower Connecticut River (Essex, CT [kilometer 11.3] to Northampton, MA [kilometer 138]) based on CPUE from a bag seine and a midwater trawl survey conducted at 12 sampling stations (Marcy 1976; Crecco et al. 1981; Savoy et al. 2004a).
The goal of the 2004 program was to continue the juvenile shad sampling program conducted during 2000 through 2003. However the midwater trawl program was discontinued in 2004 at the recommendation of Vermont Yankee's Environmental Advisory Committee because it has been ineffective in capturing juvenile shad in the pelagic zone of Vernon Pool during each of the previous four surveys. Instead, an extra 12 beach seine samples were scheduled for collection in each of the eight surveys during 2004 to replace the sampling effort lost by terminating the midwater trawl program. Use of the same beach seine sampling design and sampling procedures consistently across 2004 Juvenile Shad Bullein 82.doc 05/12.05 2
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years will develop a time series of relative abundance indices to measure inter-annual variations in year class strength ofjuvenile American shad in Vernon Pool.
2.0 MATERIALS AND METHODS 2.1 STUDY AREA The proposed study area referred to as "Vernon Pool" was defined as the mainstem Connecticut River extending from the Vernon Hydroelectric Dam in Vernon, VT upstream approximately 11.6 km (7.2 mi.) to the confluence of the West River in Brattleboro, VT (Figure 1). The study area included the "Cersosimo Lake" backwater area of the Connecticut River but not the Retreat Meadows area of the West River or other West River habitat. Vernon Pool was partitioned into the following four regions or strata based on a habitat survey of the shoreline and bathymetry conducted during the 2000 survey (Normandeau 2001, Bulletin No. 76): Vernon, Cersosimo, Brattleboro, and Cersosimo Lake (Figure 2). Surface area of the beach zone of each stratum was calculated for use to "weight" the abundance index of YOY shad (Table 1). The beach zone was defined as water from the shoreline out to the 3 m (10 ft) depth contour. By using these weighting factors, a "combined standing crop" index based on the proportion of the shore zone habitat sampled in each region, the total amount of that shore zone habitat in the study area, and the catch of YOY shad in each habitat and week could be calculated for each week.
A total of 131 beaches were identified as candidate sampling sites in Vernon Pool during the 2000 survey (Normandeau 2001, Bulletin No. 76). However, 10 of these original 131 beaches were found to be inaccessible for sampling in 2002 and 2003 due to obstructions. Therefore, 121 beaches were considered potential sampling sites in 2004, with 39 beaches in the Vernon Region, 25 beaches in the Cersosimo Region, 52 beaches in the Brattleboro Region, and 5 beaches in the Cersosimo Lake backwater (Figure 2, Table 2).
2.2 SAMPLING DESIGN Eight beach seine surveys were conducted in the Vernon Pool study area during July through October 2004 to determine the abundance and catch per unit of effort of YOY American shad and other fish species. The first survey was during the week beginning Sunday, 11 July 2004, and beach seine sampling continued every other week through Saturday, 23 October 2004, for a total of eight surveys.
The actual number and allocation of 32 seine hauls for each survey was determined based on random selection of available beaches using a proportional allocation scheme (in direct proportion to the amount of habitat in each region or stratum, Cochran, 1977). Each beach was randomly selected for sampling in each survey (without replacement) from among all available sampling locations in each region. For example, in the Brattleboro Region of the Connecticut River, we identified 52 beaches that were potentially available for beach seine sampling based on the shoreline, slope, substrate and absence of large obstructions, and then randomly selected four of these beaches for sampling in each weekly survey. Two alternate sites were also randomly selected for sampling with each gear in each week and region in case it was not possible to sample the primary site due to obstructions or extensive weed beds. Complete inventories of the station names and GPS coordinates of all beaches that were available for sampling during 2004 are presented in this bulletin as Table 2.
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2.3 BEACH SEINE SURVEY The beach seining conducted in Vernon Pool since 1997 established the effectiveness of this gear for capturing YOY American shad, and the same sampling design conducted during 2000-2003 was repeated during 2004. However, an additional 12 beaches were added to the sampling effort in 2004 to replace the sampling effort lost by terminating the midwater trawl program, resulting in a total of 32 beaches sampled in each weekly survey. For each survey, the 32 beaches were randomly selected from all 121 available beaches and sampled during the day (one hour after sunrise to one hour before sunset) with a 100 ft x 8 ft x 3/8 in. delta mesh beach seine (30.5 m long) using standardized deployment practices. One additional beach was sampled in each of the Brattleboro and Cersosimo regions, two additional beaches were sampled in the Cersosimo Lake region, and eight additional beaches were added to the Vernon region during 2004 compared to the previous four years of beach seine surveys. Habitat weighting resulted in the random selection and sampling of 4 beaches in the Brattleboro Region, 4 beaches in the Cersosimo Region, 20 beaches in the Vernon Region, and 4 beaches in the Cersosimo Lake Region of Vernon Pool during each survey (Table 1).
The entire catch of fish in each beach seine sample was identified to species, enumerated, and measured to the nearest mm total length (TL). All American shad caught were identified, enumerated, measured to the nearest mm TL, and weighed to the nearest gram. Unusually large catches of American shad or other fish species were randomly subsampled so that at least 50 individuals of each species in the sample were measured for length and weight, and the remaining portion of the sample was counted. All field sampling was performed in strict accordance with Standard Operating Procedures (Normandeau 2004b).
2.4 ANALYTICAL METHODS Catch-Per-Unit-Effort Catches from the beach seines were reported as number caught per seine haul (catch-per-unit-effort
[CPUE]) by life stage and species. The average CPUE for seines in a region and its standard error were calculated using Equations I and 2:
Cn I
-yCi,~
(1) fv i=t Cfl
=
Average CPUE in region r during week w.
Ci.
=
CPUE for sample in region r during week w.
n
=
Number of samples taken in region r during week w.
n-*
SE(C,,)
=
nlw(nlw -1)
(2) where SE(C,)
Standard error of average CPUE in region r during week w.
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C
-=
Average regional CPUE calculated in Equation 1.
Standing Crop Estimates An index of regional standing crop (and standard error) for the beach seines was obtained by multiplying CPUE and the surface area of the shore zone and dividing by the empirically derived estimate of the area sampled by the 100 ft (30.5-m) beach seine (Equations 3 and 4). The weekly index of standing crop for the shore zone was calculated as the sum of the 4 regional standing crops (Equations 5 and 6).
SC,1,, =
(C,,A,.)/A (3)
- SCM,
=
Standing crop index for the shore zone in region r during week w.
C,,
=
Average regional CPUE calculated in Equation 1.
Ar
=
Surface area (M2) of the shore zone in region r.
A Surface area (mi2) sampled by the beach seine (450 M2) (TI 1981).
SE(SC,,)
=
[SE(Cw )IA,. ) (4)
A where SE(SCr,)
=
Standard error of standing crop index for the shore zone in region r during week w.
SE(C~,,)
=
Standard error of average regional CPUE calculated in Equation 2.
r Sc
=
sc, (5) r=l where SC(SCw)
Standing crop index for week w.
SC(SC1, )
=
Regional standing crop index calculated in Equation 3.
~[E(SC*)]
=
(6) where SE(SCw )
=
Standard error of standing crop index for week w.
SE(SC1, )
=
Standard error of regional standing crop index calculated in Equations 6.
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3.0 RESULTS 3.1 SAMPLING EFFORT A total of 32 beach seine samples were collected in Vernon Pool of the Connecticut River during each of the eight biweekly surveys, resulting in the collection of 256 beach seine samples in the July through October 2004 period.
3.2 CATCH AND SPECIES COMPOSITION The beach seine survey caught an annual total of 3125 fish in Vernon Pool, and the total catch comprised 16 fish taxa during 2004 (Tables 3 and 4). At least two fish were caught in each region and week that the beach seine was fished in Vernon Pool. Bluegill (1208 fish) was the most abundant fish species caught by seines during 2004. Black crappie (566 fish) ranked second in total abundance, yellow perch (451 fish) ranked third in total abundance, golden shiner was fourth (393 fish),
largemouth bass (137 fish) was fifth, pumpkinseed (92 fish) was sixth, and American shad (82 fish) was seventh in total abundance during 2004 (Table 4). These seven fish species collectively contributed 94% of the total catch by beach seine in 2004. The remaining nine fish species collectively contributed only 6% (196 fish) of the total beach seine catch during 2004.
Juvenile American shad was seventh in abundance ranking among the fish species caught by seines in Vernon Pool during 2004 (Table 4). A total of 82 juvenile American shad were caught by beach seine during four surveys in 2004, and the catch came from the two surveys in August (8-14 August and 21-28 August), one survey in early September (5-11 September), and the first survey in October 2004 (3-9 October, Table 4). American shad were primarily caught in the Vernon Region during the two surveys in August (23 fish and 16 fish) and during the first survey in October (39 fish), but the Brattleboro Region (1 fish during 5-11 September) and Cersosimo Region (2 fish during 8-14 August) also contributed fish during the 2004 (Table 4). The 23 juvenile shad caught in the Vernon Region during the week of 8-14 August 2004 were from one seine haul taken on 10 August at Beach Number 86 (Figure 2C). The 16 juvenile shad caught in the Vernon Region during the week of 21-28 August 2004 were from one seine haul taken on 25 August 2004 at Beach Number 114 (Figure 2D).
One juvenile American shad was caught in one seine haul on 7 September 2004 at Beach Number 94 in the Vernon Region (Figure 2C). The 39juvenile shad caught in the Vernon Region during the week of 3-9 October were from two seine hauls, one haul on 4 October at Beach Number 90 produced one fish, and the second haul produced 38 fish on 7 October at Beach Number 106. Station 25 sampled on 7 September 2004 in the Brattleboro Region produced one juvenile American shad from one seine haul (Figure 2A), and Station 60 in the Cersosimo Region sampled on 7 September 2004 produced two juvenile American shad from one seine haul (Figure 2B).
Juvenile American shad caught during four weeks in the 2004 beach seine survey in Vernon Pool exhibited weekly changes in length-frequency distributions and mean length demonstrate growth during the 2004 program (Figure 3). The mean length of the 25 American shad caught by seine during the week of 8-14 August 2004 was 75 mm total length (S.E. = 1.0 mm), with a range in length from 66 mm to 85 mm. The mean length of the 16 American shad caught by seine during the week of 21-28 August 2004 was 86 mm total length (S.E. = 1.4 mm), with a range in length from 71 mm to 95 mm. The mean length of the 2 American shad caught by seine during the week of 5-11 September 2004 was 86 mm total length (S.E. = 8.5 mm), with a range in length from 78 mm to 95 mm. The 2004 Juvenile Shad Bulletin 82.doc 05/12/05 6
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mean length of the 39 American shad caught by seine during the week of 3-9 October 2004 was 95 mm total length (S.E. = 0.9 mm), with a range in length from 84 mm to 108 mm. The difference in mean lengths between first and last collection weeks suggest that juvenile American shad in Vernon Pool exhibited a growth rate of about 2.5 mm per week during 2004.
The beach seine catch of all fish species combined increased successively from the first through the seventh surveys in 2004, reaching a peak abundance of 633 fish during the week of 3-9 October 2004, and then declined in the last week of the survey (366 fish, 17-23 October, Table 4). The observed temporal pattern of increase was influenced most by corresponding changes in bluegill, black crappie, and golden shiner abundance in the Vernon and Cersosimo Lake Regions (Table 4). The Vernon Region contributed the most fish to the total catch (1622 fish or 52%) throughout 2004, but this was not surprising since this region also had most of the seine sampling effort. The Cersosimo Lake Region contributed the second most number of fish in 2004, with 1058 fish representing 34% of the total beach seine catch (Table 4).
3.2 CATCH PER UNIT EFFORT (CPUE)
The weekly mean CPUE for all fish taxa combined in the beach seine survey was between a low of 5.03 fish/haul among all sampling regions of Vernon Pool during the week of 11-17 July 2004 and a high of 19.78 fish/haul during the week of 3-9 October 2004 (Table 5). Bluegill (7.88 fish/haul),
golden shiner (3.75 fish/haul), and black crappie (3.31 fish/haul) were the fish species contributing most to the seasonal peak in CPUE during the week of 3-9 October 2004 (Table 5). The highest regional mean CPUE for all fish taxa combined was 72.25 fish/haul observed in the Cersosimo Lake Region of Vernon Pool during the week of 3-9 October 2004 (Table 5). The Cersosimo Lake Region also exhibited a relatively high CPUE for all fish taxa combined of 42.50 fish/haul during the week of 21-28 August and a CPUE of 41.75 fish/haul during the week of 19-25 September 2004 (Table 5).
Bluegill, black crappie, and golden shiner contributing most to this Cersosimo Lake Region peak in CPUE (Table 5).
The weekly mean CPUE for American shad in the beach seine survey was low throughout the 2004 survey compared to the CPUE for resident fish taxa, and was 0.00 fish/haul among all sampling regions of Vernon Pool during the first two surveys (July) and during the last survey in September (19-25 September) and last survey in October (17-23 October) of 2004 (Table 5). American shad were caught predominantly in the Vernon Region during four separate weeks of 2004. CPUE was 1.15 fish/haul during the week of 8-14 August, CPUE was 0.80 fish/haul during the week of 21-28 August, CPUE was 0.05 fish/haul during the week of 5-11 September, and CPUE was 1.95 fish/haul in the Vernon Region during the week of 3-9 October 2004 (Table 5). American shad were also caught in the Brattleboro Region during the week of 5-11 September 2004, with a CPUE of 0.25 fish/haul, and exhibited a CPUE of 0.50 in the Cersosimo Region during the week of 8-14 August 2004 (Table 5). No American shad were caught in the Cersosimo Lake Region in any week during the 2004 survey (Table 5). Sampling variability was also high, with the standard error of the mean CPUE equal to or nearly equal to the mean CPUE in each region (Table 5). The high variability is most likely a result of schooling behavior in juvenile American shad, which makes the probability of catching fish at any one beach low, but when they are present the CPUE will be high. For example, The CPUE of 1.95 juvenile American shad per haul from the Vernon Region during the week of 3-9 October 2004 had a standard error of 1.90 (Table 5), which was the result of a catch of 39 juvenile shad from just two seine hauls out of a total of 20 seine hauls in that week and region, one haul on 4 2004 Juivenlile Shad Bulklein 82.doc 05/12/057 7
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October at Beach Number 90 produced one fish, and the second haul produced 38 fish on 7 October at Beach Number 106 (Figure 2C).
3.3 JUVENILE AMERICAN SHAD STANDING CROP INDEX The Brattleboro, Cersosimo and Vernon Regions in Vernon Pool all contributed juvenile American shad to the weekly combined standing crop index in 2004, and this contribution came from four out of the eight surveys, 8-14 August, 21-28 August, 5-11 September, and 3-9 October 2004 (Table 6).
When the average was taken among all eight weeks in the 2004 survey, the standing crop index for Vernon Pool was 2066 juvenile American shad with a standard error of +/-2041 fish. The beach seine survey contributed all of the fish to the index in 2004, as it has in all past surveys except 2003.
4.0 DISCUSSION The beach seine survey continues to be an effective program for sampling juvenile American shad and other fish taxa in Vernon Pool. Random allocation of the sampling effort among four geographic regions made the beach seine survey conducted during 2000 through 2004 was more robust and representative of the entire Vernon Pool compared with previous surveys. The random design was not subjected to variability associated with changes in fish distribution compared with a fixed location design such as sampling only in Cersosimo Lake.
All five annual surveys demonstrated that significant numbers ofjuvenile American shad are found in the Vernon Pool section of the Connecticut River (Table 7). The Vernon Region has consistently contributed most of the fish to the standing crop index among all five years (Table 7) compared to the other regions identified in Vernon Pool, and has a substantial amount of beach habitat (Table 1) that may represent a nursery area for juvenile American shad. The shallow, nearshore habitat along the east shore of lower Vernon Pool opposite Vermont Yankee in the New Hampshire setback area has consistently produced the highest seine catches ofjuvenile American shad among the five surveys.
The 2004 survey was begun one-week later in July than surveys performed during 2000 through 2002, and in the same Julian week as the 2003 survey in an attempt to synchronize the sampling period later in anticipation of a late adult spawning migration. Zero seine catches in all regions during the first two surveys of 2004 (July) reflected appropriate synchronization in the annual development cycle forjuvenile American shad in Vernon Pool. In 2000, the highest weekly standing crop index for juvenile American shad was observed during the week of 7-11 August (Normandeau 2001, Bulletin no. 76), while during 2001, the peak standing crop index was observed nearly two months later during the week 1-5 October 2001 (Normandeau 2001, Bulletin No. 78). In 2002, juvenile American shad abundance reached a peak during the last two weeks of the 2002 survey (Normandeau 2003, Bulletin No. 79), and in 2003, juvenile American shad abundance reached a peak during the last week of September (Normandeau 2004a, Bulletin No. 8 1). The occurrence of the peak seine standing crop index during the middle four weeks of the 2004 survey indicates that starting in Mid July was effective in centering the survey effort coincident with the peak seasonal occurrence of juvenile shad in Vernon Pool.
Marcy (1976) considered year class strength of American shad in the Connecticut River to be dependent primarily on the following three factors: number of adults potentially available to spawn, water temperature, and discharge. A multiple linear regression model developed by Marcy (1976) revealed a highly significant relationship (p< 0.05) between year class strength (CPUE) and the 2004 Juvenile Shad Bulletin 82.doc 05/12/05 8
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combination of available spawning adults, water temperature, and discharge. Marcy stated that this model can explain 86% of the variability in year class strength and could therefore be used to predict the production ofjuvenile shad in a particular year with a relatively high degree of success. However, with only five years (2000 through 2004) of annual standing crop indices, it is premature to develop a model to predict year class strength ofjuvenile American shad in Vernon Pool.
Examining the observed relationship between the number of adult American shad in Vernon Pool and the juvenile shad standing crop index for 2000 through 2004 (Table 8) suggests that the index may be better correlated with the number of adult females in Vernon Pool or the number of adult females passing upstream through the Vernon Dam fishway than the total adult spawning run. The Pearson product moment correlation coefficient (r2) describing the relationship between the juvenile shad beach seine standing crop abundance index for Vernon Pool (Y) and the combined number of adult female American shad stocked or passed into Vernon Pool (X) was 0.44, compared to an r2 of 0.28 for the relationship between the index and the total number of adult shad in Vernon Pool. This means that 44% of the year to year variation in the juvenile shad standing crop index over the past five years (2000-2004) is explained by the relationship with the number of adult female shad in Vernon Pool, compared to only 28% of the variation explained by the relationship with the total number of adult shad in Vernon Pool. The total number of adult shad in Vernon Pool was similar between 2000 (1,807 fish) and 2001 (1,737 fish), while the juvenile shad index was nearly 13 times higher in 2000 (31,244 juvenile fish) than in 2001 (2,433 fish). The total number of adult shad in Vernon Pool was also similar among the past three years (956 fish in 2002, 1137 fish in 2003, and 1005 fish in 2004),
while the juvenile shad index was nearly 15 times higher in 2002 (10,528 juvenile fish) than in 2003 (723 fish), and was 5 times higher in 2002 compared to 2004 (2,066 fish). The estimated total number of adult female (roe) shad in Vernon Pool was 701 fish in 2000 and 168 fish in 2001 (Table 8). However, the lowest juvenile shad standing crop index was observed in 2003, while the total number of adult female shad in 2003 (525 females) was the second highest and similar to 2002 (402 females) and 2004 (469 females) compared to 2000 or 2001.
Other factors in addition to the number of adult female shad have been considered to be important drivers of the stock-recruitment relationship determining juvenile shad year class strength in the lower Connecticut River, including the timing of high rainfall and river flow events in June, which depress water temperatures, delay or compress spawning activity, and dilute the availability of zooplankton for first feeding of the shad larvae (Savoy et al. 2004a, 2004b). Dominant year classes of American shad in the lower Connecticut River (downstream from the Enfield Dam) were best correlated with lower than normal June flows coupled with a moderate abundance of the spawning adults (Savoy et al. 2004a). However, June average river discharge at Vernon Dam (Table 8) was poorly correlated with the juvenile shad beach seine standing crop abundance index for Vernon Pool over the past five years, with an r2 of only 0.03. From the data available to date, it therefore appears that the number of spawning adult female American shad is the single factor most related to the inter-annual variation in juvenile shad abundance in Vernon Pool. A time series often or more years ofjuvenile American shad abundance index data will be needed before the statistical relationship between year class strength, adult populations, sex composition of the adult run, and environmental factors such as June river flows can be reliably described for Vernon Pool and compared to the lower river.
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5.0 LITERATURE CITED Cochran, W.G. 1977. Sampling techniques, third edition. John Wiley and Sons, New York. 428 pp.
Crecco, V.A., L. Gunn, and T. Savoy. 1981. The Connecticut River shad study, 1980. Final Report.
Connecticut Dep. Environ. Prot. A.F.C. 12. 136 p.
Marcy, B. C., Jr. 1976. Early life history studies of American shad in the lower Connecticut River and the effects of the Connecticut Yankee plant. In: Merriman, D. and L.M. Thorpe, eds. The Connecticut River Ecological Study. Am. Fish. Soc. Monogr. 1: 141-168. Washington D.C.
Downey, P.C. and N.R. Staats. 1991. Composition of the adult American shad (Alosa sapidissima (Wilson)) at Vernon Dam Fishway and Turners Falls Fishway, 1990. Vermont Yankee/Connecticut River System Analytical Bulletin 40. Aquatec Inc., South Burlington VT.
Downey, P.C. and M. P.Biercevicz. 1991. Relative density and growth ofjuvenile American shad in the Connecticut River near Vernon, Vermont, 1990. Yankee/Connecticut River System Analytical Bulletin 42. Aquatec Inc., South Burlington VT.
Nelson, J. S., E. J. Crossman, H. Espinosa-Perez, L. T. Findley, C. R. Gilbert, R. N. Lea, and J. D.
Williams. 2004. Common and scientific names of fishes from the United States, Canada, and Mexico. American Fisheries Society Special Publication 29, Bethesda, Maryland.
Normandeau Associates, Inc. (Normandeau). 2004a. Abundance ofjuvenile American shad in the Vernon Pool during 2003. Vermont Yankee/Connecticut River System Analytical Bulletin 8 1. Prepared for Entergy Nuclear Vermont Yankee, LLC, Brattleboro, VT.
Normandeau. 2004b. Standard Operating Procedures forjuvenile American shad sampling in the Connecticut River during 2004. Revision 4. Prepared for Entergy Nuclear Vermont Yankee, LLC, Brattleboro, VT.
Normandeau. 2003. Abundance ofjuvenile American shad in the Vernon Pool during 2002. Vermont Yankee/Connecticut River System Analytical Bulletin 79. Prepared for Vermont Yankee Nuclear Power Corporation, Brattleboro, VT.
Normandeau. 2002. Abundance ofjuvenile American shad in the Vernon Pool during 2001. Vermont Yankee/Connecticut River System Analytical Bulletin 78. Prepared for Vermont Yankee Nuclear Power Corporation, Brattleboro, VT.
Normandeau. 2002. Composition of adult American shad at the Vernon Hydroelectric Dam fishway during spring 2001. Vermont Yankee/Connecticut River System Analytical Bulletin 77.
Prepared for Vermont Yankee Nuclear Power Corporation, Brattleboro, VT.
Normandeau. 2001. Abundance ofjuvenile American shad in the Vernon Pool during 2000. Vermont Yankee/Connecticut River System Analytical Bulletin 76. Prepared for Vermont Yankee Nuclear Power Corporation, Brattleboro, VT.
Normandeau. 2000. Abundance ofjuvenile American shad in the Vernon Pool during 1999. Vermont Yankee/Connecticut River System Analytical Bulletin 75. Prepared for Vermont Yankee Nuclear Power Corporation, Brattleboro, VT.
Normandeau. 1999. Abundance ofjuvenile American shad in the Vernon Pool during 1998. Vermont Yankee/Connecticut River System Analytical Bulletin 73. Prepared for Vermont Yankee Nuclear Power Corporation, Brattleboro, VT.
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NORMANDEAU ASSOCIATES INC.
Normandeau. 1998. Abundance ofjuvenile American shad in the Vernon Pool during 1997. Vermont Yankee/Connecticut River System Analytical Bulletin 71. Prepared for Vermont Yankee Nuclear Power Corporation, Brattleboro, VT.
Savoy, T.F., V.A. Crecco, and B.C. Marcy. 2004a. American shad early life history and recruitment in the Connecticut River: a 40-year summary. Am. Fish. Soc. Monogr. 9: 407-417.
Savoy, T.F. and V.A. Crecco. 2004b. Factors affecting the recent decline of blueback herring and American shad in the Connecticut River. Am. Fish. Soc. Monogr. 9: 361-377.
Texas Instruments, Inc. (TI). 1981. 1979 Year Class Report for the multiplant impact study of the Hudson River Estuary. Prepared for Consolidated Edison Company of New York, Inc.
2004 Juvenile Shad Bulletin 82.doc 05112105 I1I
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FIGURES AND TABLES FOR THE 2004 JUVENILE AMERICAN SHAD BULLETIN No. 82 2004 Juvenile Shad Bulilein 82.doc 05112,'05 112
NORMANDEA U ASSOCIA TES INC.
0 Brattleboro Region RIPER Figure 'A Brat~ehore 19 PIn
/ f Cersesimot R ~Ion
,ýIqw. 2 B e FIgure 20'
+
V MONT o
Imo Regi i
- ~~
- iigure, VER1110Wii X9NKEE POWER M
)-No
" glr* 2 LEGEND N
Major Roads
.Figur 1: Vernon Pool Study Minor Roads ILof the Conner-ticut River,
/Railroads Vernon to Brattleboro, Vi E]DepthlOft and Greater 1000 0
1000 Meters
[IDepth 1lOft.
or Less IJan.
11 Figure 1.
Veron Pool Study Area of the Connecticut River, Veron to Brattleboro, VT.
2004 Juvenile Shad Bulletin 82.doc 05/12/05 13
NORMA NDEA U ASSOCIA TES INC.
Figure 2a.
Juvenile American Shad Study, Connecticut River, Vernon to Brattleboro, VT.
2004 Juvenile Shad Bulletin 82.doc 05/12/05 14
NORMANDEA U ASSOCIATES INC.
Figure 2b.
Juvenile American Shad Study, Connecticut River, Vernon to Brattleboro, VT.
2004 Juvenile Shad Bulletin 82.doc 05/12/05 15
NORMANDEA U A SSOCIA TES INC.
0 Figure 2c.
Juvenile American Shad Study, Connecticut River, Vernon to Brattleboro, VT.
0 2004 Juvenile Shad Bulletin 82.doc 05/12/05 16
NORMANDEA U ASSOCIATES INC.
//
LEGEND:
Beaches
/V Major Roads
/\\/Minor Roads N
/Railroads DepthlOft and Greater 400 0
r-Depth 1Oft. or Less 400 Meters Figure 2d.
Juvenile American Shad Study, Connecticut River, Vernon to Brattleboro, VT.
2004 Juvenile Shad Bulletin 82.doc 05/12/05 17
NORMA NDEA U ASSOCIATES INC.
Sampling Week 17-23 Oct Z7L 03-09 Oct 19-25Sep 0
0 05-i0e 0
/
0
/ 0 05-11 Sep i
21-28 Aug
/
FE 08-14 Aug jWL 25-31 Jul 11lJl 0
0 0
0 0
0 0
0 0
0 60-69 70-79 80-89 90-99 100-109 Total Length (mm)
Figure 3.
Weekly Length-Frequency of Juvenile American Shad Caught by Seine in Vernon Pool of the Connecticut River, July - October 2004.
2004 Juivenile Shad Builletin 82.doc 05112/05 118
(-
C C
CD 0,
C-CO b,
Table 1.
Area (Square Meters) of Sampling Regions and Weighting Factors Used to Calculate the Standing Crop Index for Juvenile American Shad in Vernon Pool of the Connecticut River, July - October 2004.
Number of Beach Area Allocation Total Water Beach Pelagic Seine Sample Weighting Number of REGION Surface Area (mi)
Surface Area (mi2 )
Surface Area (mi2)
Units (450 M2 )
Factor Seine Samples Brattleboro 912,828 372,683 540,145 828 0.1392 4
Cersosimo 795,667 259,316 536,351 576 0.0969 4
Vernon 3,127,489 1,826,417 1,301,072 4,059 0.6821 20 Cersosimo Lake 292,504 219,084 73,420 487 0.0818 4
All Regions 5,128,488 2,677,500 2,450,988 5,950 1.0000 32 0
0 P
G.
NORMANDEA U ASSOCIATES INC.
Table 2.
Station Names and Latitude/Longitude Coordinates for Beach Seine Samples in Vernon Pool of the Connecticut River, July - October 2004.
Minutes of River Station Latitude Longitude Region Shore (Beach Number)
N 42 Deg.
W 72 Deg.
Brattleboro VT 1 '
51.9255 33.2941 Brattleboro Nil 2
51.9929 33.1879 Brattleboro VT 31 51.8968 33.2822 Brattleboro Nil 4
51.9117 33.1598 Brattleboro VT 51 51.8737 33.2727 Brattleboro Nil 6
51.8675 33.1341 Brattleboro VT 7
51.8321 33.2630 Brattleboro Nil 8
51.7837 33.1249 Brattleboro VT 9
51.8129 33.2584 Brattleboro Nil 10 51.4018 33.2066 Brattleboro VT 11 51.7713 33.2397 Brattleboro Nil 12 51.3173 33.1191 Brattleboro VT 13 51.4312 33.3382 Brattleboro Nil 14 51.3046 33.1035 Brattleboro VT 15 51.3401 33.3706 Brattleboro Nil 16 51.2814 33.1059 Brattleboro VT 17 51.3270 33.3766 Brattleboro Nil 18 51.2545 33.0841 Brattleboro VT 19 51.3095 33.3840 Brattleboro Nil 20 51.2716 33.0954 Brattleboro VT 21 51.1998 33.4244 Brattleboro Nil 22 51.2280 33.0760 Brattleboro VT 23 51.1657 33.4202 Brattleboro Nil 24 51.2090 33.0628 Brattleboro VT 25 51.1714 33.2593 Brattleboro NIl 26 51.1749 33.0550 Brattleboro VT 27 51.1526 33.2741 Brattleboro Nil 28 51.1937 33.1158 Brattleboro VT 29 51.1660 33.2216 Brattleboro NIl 30 51.1685 33.1021 Brattleboro VT 31 51.1323 33.1857 Brattleboro Nil 32 51.1236 33.0806 Brattleboro VT 33 51.1040 33.2952 Brattleboro Nil 34 51.1346 33.1047 Brattleboro VT 35 51.0769 33.2470 Brattleboro Nil 36 51.1623 33.1327 Brattleboro VT 37 50.9990 33.0589 Brattleboro Nil 38 51.0640 33.0155 Brattleboro VT 39 51.0167 33.0551 Brattleboro Nil 40 50.9986 32.9806 Brattleboro VT 41 50.9942 33.2817 Brattleboro Nil 42 50.6922 32.7754 Brattleboro VT 43 50.9832 33.2651 Brattleboro Nil 44 50.5639 32.7361 Brattleboro VT 45 50.8573 33.2048 Brattleboro Nil 46 50.4804 32.7448 2004 Juvenile Shad Bulletin 82.doc 05/12/05 20
NORMANDEA U ASSOCIATES INC.
Table 2. (Continued)
Minutes of River Station Latitude Longitude Region Shore (Beach Number)
N 42 Deg.
W 72 Deg.
Brattleboro VT 47 50.6755 32.8840 Brattleboro Nil 48 50.3419 32.7304 Brattleboro VT 49 50.6485 32.8648 Brattleboro Nil 50 50.2923 32.7100 Brattleboro VT 51 50.6439 32.9017 Brattleboro NIl 52 50.2676 32.7126 Brattleboro VT 53 50.6221 32.8894 Brattleboro VT 55 50.3951 32.8583 Brattleboro VT 57 50.3634 32.8403 Cersosimo Nil 54 50.1685 32.7202 Cersosimo Nil 56 49.9046 32.6941 Cersosimo Nil 58 49.8384 32.6834 Cersosimo VT 59 50.1186 32.8186 Cersosimo Nil 60 49.5969 32.6430 Cersosimo VT 61 50.0469 32.8196 Cersosimo NH 62 49.5126 32.6496 Cersosimo VT 63 50.0960 32.8262 Cersosimo Nil 64 49.4802 32.6362 Cersosimo VT 65 50.0257 32.8243 Cersosimo Nil 66 48.9618 32.3895 Cersosimo VT 67 49.9757 32.8106 Cersosimo Nil 68 48.8995 32.3828 Cersosimo VT 69 49.9204 32.7984 Cersosimo Nil 70 48.8769 32.3835 Cersosimo VT 71 49.8398 32.7912 Cersosimo Nil 72 48.8442 32.3932 Cersosimo VT 73 49.5438 32.7932 Cersosimo Nil 74 48.8215 32.3967 Cersosimo VT 75 49.5173 32.7778 Cersosimo Nil 76 48.6312 32.3305 Cersosimo VT 77 49.3245 32.7262 Cersosimo VT 79 49.2461 32.6862 Cersosimo VT 81 49.0282 32.5713 Cersosimo VT 83 48.9513 32.5365 Vernon Nil 78 48.4866 32.2750 Vernon Nil 80 48.2457 32.1 131 Vernon Nil 82 48.2104 31.8710 Vernon Nil 84 '
48.0319 31.7799 Vernon VT 85 48.4618 32.5088 Vernon Nil 86 47.9749 31.6672 Vernon VT 87 48.4355 32.4971 Vernon Nil 88 47.9872 31.6469 Vernon VT 89 48.2695 32.3307 Vernon Nil 90 48.0080 31.6550 Vernon VT 91 48.2456 32.3175 Vernon Nil 92 48.0240 31.6508 Vernon VT 93 47.8682 31.9313 2004 Juvenile Shad Bulletin 82.doc 05/12/05 21
NORMANDEA U ASSOCIATES INC.
Table 2. (Continued)
Minutes of River Station Latitude Longitude Region Shore (Beach Number)
N 42 Deg.
W 72 Deg.
Vernon Nil 94 48.0606 31.6635 Vernon VT 95 47.3485 31.4840 Vernon Nil 96 48.0987 31.6603 Vernon VT 97 47.3411 31.4301 Vernon Nil 98 48.0471 31.5997 Vernon VT 99 47.3290 31.3525 Vernon Nil 100 47.9911 31.5845 Vernon VT 101 47.3428 31.4538 Vernon Nil 102 47.9621 31.5452 Vernon VT 103 47.2810 31.2483 Vernon Nl-104 47.9455 31.4903 Vernon VT 105 47.2511 31.2035 Vernon NIl 106 47.9482 31.5137 Vernon VT 107 47.1011 31.0094 Vernon Nil 108 47.7681 31.1934 Vernon VT 109 46.8380 30.7601 Vernon Nil 110 47.7284 31.1257 Vernon VT 11I 46.5809 30.6698 Vernon Ni!
112 47.7520 31.1641 Vernon VT 113 46.5315 30.6682 Vernon Nil 114 47.5999 30.9487 Vernon Nil 116 47.5869 30.9346 Vernon NHl 118 47.3001 30.4170 Vernon Nil 120' 47.1317 30.3791 Vernon Nil 122 '
47.0937 30.3818 Vernon Nil 124' 47.0502 30.2996 Vernon Nil 126 47.0071 30.2895 Vernon Nit 128 46.7989 30.2935 Vernon Nil 130 46.7695 30.2993 Vernon Nil 132 46.6186 30.3132 Vernon Nil 134 46.5492 30.3401 Vernon Nil 136' 46.5217 30.3546 Vernon NH 138 '
46.3821 30.3575 Cersosimo Lake VT 991 49.7639 33.0567 Cersosimo Lake VT 992 49.8296 33.1013 Cersosimo Lake VT 993 49.8778 33.1700 Cersosimo Lake VT 994 49.9080 33.1873 Cersosimo Lake VT 995 49.9531 33.2030 Not sampled in 2004 due to shallow depth or heavy debris.
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Table 3.
Checklist of Fishes (Nelson et al. 2004) Collected by the Beach Seine Survey In Vernon Pool of the Connecticut River During 2004.
Scientific Name Common Name Alosa sapidissinia American shad Esox hlchis Northern pike Esox niger Chain pickerel Nolemigonus crysoleucas Golden shiner Notropis hudsonhis Spottail shiner Catostomnus commersoni White sucker Diaphanusfinduuhs Banded killifish Morone americana White perch Ambloplites rupestris Rock bass Lepomis gibbosus Pumpkinseed Lepomis macrochirus Bluegill Microptenrs dolomieu Smallmouth bass Micropterus salmoides Largemouth bass Pornoxis nigromaculatus Black crappie Etheostoma olmstedi Tesselated darter Percaflavescens Yellow perch 2004 Juvenile Shad Bulletin 82.doc 05/12,D5 23
NORMANDEAU ASSOCIATES INC.
Table 4.
Weekly and Regional Number of Fish Caught by Beach Seine in Vernon Pool of the Connecticut River, July - October 2004.
Number of Fish Caught in Sampling Week Taxon Region 11-17 25-31 08-14 21-28 05-11 19-25 03-09 17-23 All Jul Jul Aug Aug Sep Sep Oct Oct Weeks American Brattleboro 0
0 0
0 1
0 0
0 1
shad Cersosimo 0
0 2
0 0
0 0
0 2
Vernon 0
0 23 16 1
0 39 0
79 Cersosimo 0
0 0
0 0
0 0
0 0
Lake All 0
0 25 16 2
0 39 0
82 Regions Bluegill Brattleboro 0
0 0
2 2
4 2
5 15 Cersosimo 1
3 0
3 23 21 4
5 60 Vernon 24 26 36 102 172 210 157 138 865 Cersosimo 3
10 37 24 54 26 89 25 268 Lake All 28 39 73 131 251 261 252 173 1208 Regions Black Brattleboro 0
0 1
5 2
I 1
2 12 crappie Cersosimo 0
0 1
1 1
2 1
1 7
Vernon 6
5 13 35 38 11 0
3 111 Cersosimo 29 33 55 82 19 62 104 52 436 Lake All 35 38 70 123 60 76 106 58 566 Regions Yellow perch Brattleboro 1
0 0
14 11 33 4
8 71 Cersosimo 2
15 11 9
5 4
2 4
52 Vernon 43 27 54 15 14 26 46 30 255 Cersosimo 4
5 23 17 9
6 7
2 73 Lake All 50 47 88 55 39 69 59 44 451 Regions Golden Brattleboro 0
0 0
1 0
0 11 I
13 shiner Cersosimo 0
9 4
0 15 0
32 4
64 Vernon 13 1
18 I1 5
5 0
54 107 Cersosimo 0
6 7
33 18 59 77 9
209 Lake All 13 16 29 45 38 64 120 68 393 Regions Largemouth Brattleboro 0
4 0
5 0
2 0
0 11 bass Cersosimo 1
5 2
I 1
8 i
0 19 Vernon 7
23 11 12 14 4
7 5
83 Cersosimo 1
6 7
2 3
3 2
0 24 Lake All 9
38 20 20 18 17 10 5
137 Regions I
I (continued) 2004 Juvenile Shad Bulletin 82.doc 05112/05 24
NORMANDEA U ASSOCIATES INC.
Table 4. (Continued)
Number of Fish Caught in Sampling Week Taxon Region 11-17 25-31 08-14 21-28 05-11 19-25 03-09 17-23 All Jul Jul Aug Aug Sep Sep Oct Oct Weeks Pumpkinseed Brattleboro 0
0 0
0 0
1 0
1 2
Cersosimo 2
0 0
0 1
2 1
3 9
Vernon 8
0 1
6 6
31 17 4
73 Cersosimo 3
2 1
2 0
0 0
0 8
Lake All 13 2
2 8
7 34 18 8
92 Regions Rock bass Brattleboro 0
0 1
10 9
9 4
I 34 Cersosimo 0
3 0
1 8
3 3
2 20 Vernon 1
I 5
4 0
2 0
0 13 Cersosimo 0
0 1
3 3
0 1
0 8
Lake All 1
4 7
18 20 14 8
3 75 Regions Spottail Brattleboro 2
0 0
9 0
2 5
4 22 shiner Cersosimo 0
1 10 I
0 0
0 1
13 Vernon 1
1 3
2 0
1 0
1 9
Cersosimo 0
2 0
0 0
9 3
0 14 Lake All 3
4 13 12 0
12 8
6 58 Regions Chain Brattleboro 0
0 0
0 0
0 0
0 0
pickerel Cersosimo 0
1 0
1 1
0 0
0 3
Vernon 4
1 3
3 2
3 4
0 20 Cersosimo 0
0 0
0 0
0 0
0 0
Lake All 4
2 3
4 3
3 4
0 23 Regions Banded Brattleboro 0
0 0
0 1
0 0
0 1
Killifish Cersosimo 0
I 0
0 1
0 2
0 4
Vernon 0
0 0
0 0
0 0
0 0
Cersosimo 0
0 0
0 0
0 4
0 4
Lake All 0
1 0
0 2
0 6
0 9
Regions Northern Brattleboro 0
0 0
0 0
0 0
0 0
pike Cersosimo 0
1 0
0 0
0 0
0 1
Vernon 0
0 0
2 0
0 0
1 3
Cersosimo 0
2 0
0 0
0 2
0 4
Lake All 0
3 0
2 0
0 2
1 8
1 Regions (continued) 2004 Juvenile Shad Bulletin 82.doc 05/12/05 25
NORMANDEA U ASSOCIATES INC.
Table 4. (Continued)
Number of Fish Caught in Sampling Week Taxon Region 11-17 25-31 08-14 21-28 05-11 19-25 03-09 17-23 All Jul Jul Aug Aug Sep Sep Oct Oct Weeks White sucker Brattleboro 3
0 0
0 0
1 0
0 4
Cersosimo 0
1 0
0 0
0 0
0 1
Vernon 1
0 0
0 0
0 0
0 1
Cersosimo 0
0 0
0 0
2 0
0 2
Lake All 4
1 0
0 0
3 0
0 8
Regions White perch Brattleboro 0
0 0
0 0
0 0
0 0
Cersosimo 0
0 0
0 0
0 0
0 0
Vernon 0
0 0
0 0
0 0
0 0
Cersosimo 0
1 0
7 0
0 0
0 8
Lake All 0
1 0
7 0
0 0
0 8
Regions Smallmouth Brattleboro 0
0 0
1 1
0 0
0 2
bass Cersosimo 0
1 0
0 0
0 0
0 1
Vernon 0
0 0
2 0
0 0
0 2
Cersosimo 0
0 0
0 0
0 0
0 0
Lake All 0
1 0
3 1
0 0
0 5
Regions Tesselated Brattleboro 1
0 0
0 0
0 0
0 1
darter Cersosimo 0
0 0
0 0
0 0
0 0
Vernon 0
0 0
0 0
0 I
0 1
Cersosimo 0
0 0
0 0
0 0
0 0
Lake All 1
0 0
0 0
0 1
0 2
Regions All Taxa Brattleboro 7
4 2
47 27 53 27 22 189 Combined Cersosimo 6
41 30 17 56 40 46 20 256 Vernon 108 85 167 210 252 293 271 236 1622 Cersosimo 40 67 131 170 106 167 289 88 1058 Lake All 161 197 330 444 441 553 633 366 3125 Regions 2004 Juvenile Shad Bulletin 82.doc 05112/05 26
NORMANDEA U ASSOCIATES INC.
Table 5.
Weekly and Regional Mean Catch Per Unit of Effort (CPUE) by Beach Seine in Vernon Pool of the Connecticut River, July - October 2004.
2004 Week and Taxon VERNON POOL REGION Cersosimo American shad Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.00 0.00 0.00 0.00 0.00 11-17 Jul SE 0.00 0.00 0.00 0.00 0.00 NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 253 SE 0.00 0.00 0.00 0.00 0.00 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.50 1.15 0.00 0.78 081 SE 0.00 0.50 1.15 0.00 0.72 Aug S
NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.80 0.00 0.50 212 SE 0.00 0.00 0.80 0.00 0.50 NO.IIAULS 4
4 20 4
32 CPUE 0.25 0.00 0.05 0.00 0.06 051 SE 0.25 0.00 0.05 0.00 0.04 Sep S
NO.ItAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 192 SE 0.00 0.00 0.00 0.00 0.00 NO.HAULS 4
4 20 4
32 CPUE 0.00 0.00 1.95 0.00 1.22 03-09 Oct SE 0.00 0.00 1.90 0.00 1.19 Oct NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 17-23 Oct SE 0.00 0.00 0.00 0.00 0.00 Oct NO.HAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05/12/05 27
NORMANDEA U ASSOCIATES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo Bluegill Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.00 0.25 1.20 0.75 0.88 111 SE 0.00 0.25 0.70 0.48 0.44 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.75 1.30 2.50 1.22 25-31 SE 0.00 0.75 0.81 2.18 0.57 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 1.80 9.25 2.28 08-14 SE 0.00 0.00 0.61 4.01 0.76 Aug NO.HAULS 4
4 20 4
32 CPUE 0.50 0.75 5.10 6.00 4.09 21-28 SE 0.50 0.75 2.37 1.96 1.53 Aug NO.HAULS 4
4 20 4
32 CPUE 0.50 5.75 8.60 13.50 7.84 05-11 0.50 2.25 2.43 10.71 2.02 Sep S
Sep NO.HAULS 4
4 20 4
32 CPUE 1.00 5.25 10.50 6.50 8.16 19-25 SE 0.41 3.68 4.16 4.48 2.72 Sep NO.HAULS 4
4 20 4
32 CPUE 0.50 1.00 7.85 22.25 7.88 03-09 SE 0.50 0.71 2.11 11.83 2.16 Oct Oct NO.HAULS 4
4 20 4
32 CPUE 1.25 1.25 6.90 6.25 5.41 17-23 SE 1.25 0.95 2.89 5.92 1.96 Oct NO.HAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05112,05 28
NORMANDEAU ASSOCIA TES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo Black crappie Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.00 0.00 0.30 7.25 1.09 11-17 Jul SE 0.00 0.00 0.18 4.42 0.65 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.25 8.25 1.19 25-31 SE 0.00 0.00 0.18 4.97 0.74 Jul NO.! IAULS 4
4 20 4
32 CPUE 0.25 0.25 0.65 13.75 2.19 08-14 SE 0.25 0.25 0.26 12.45 1.59 Aug NO.HAULS 4
4 20 4
32 CPUE 1.25 0.25 1.75 20.50 3.84 21-28 SE 1.25 0.25 0.77 13.73 1.95 Aug NO.HAULS 4
4 20 4
32 CPUE 0.50 0.25 1.90 4.75 1.88 05-11 SE 0.50 0.25 0.81 4.75 0.76 Sep NO.HAULS 4
4 20 4
32 CPUE 0.25 0.50 0.55 15.50 2.38 19-25 SE 0.25 0.29 0.31 8.96 1.34 Sep NO.ItAULS 4
4 20 4
32 CPUE 0.25 0.25 0.00 26.00 3.31 03-09 Oct SE 0.25 0.25 0.00 15.03 2.26 NO.HAULS 4
4 20 4
32 CPUE 0.50 0.25 0.15 13.00 1.81 17-23 Oct SE 0.50 0.25 0.08 13.00 1.62 Oct NO.HAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05/12/05 29
NORMANDEA U ASSOCIATES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo Golden shiner Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.00 0.00 0.65 0.00 0.41 11l SE 0.00 0.00 0.46 0.00 0.29 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 2.25 0.05 1.50 0.50 25-31 SE 0.00 2.25 0.05 1.50 0.33 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 1.00 0.90 1.75 0.91 08-14 SE 0.00 0.41 0.61 1.75 0.43 Aug NO.IAULS 4
4 20 4
32 CPUE 0.25 0.00 0.55 8.25 1.41 21-28 SE 0.25 0.00 0.26 7.28 0.94 Aug NO.IIAULS 4
4 20 4
32 CPUE 0.00 3.75 0.25 4.50 1.19 05-11 SE 0.00 2.84 0.14 4.50 0.67 Sep NO.MIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.25 14.75 2.00 19-25 SE 0.00 0.00 0.16 14.75 1.84 Sep NO.HAULS 4
4 20 4
32 CPUE 2.75 8.00 0.00 19.25 3.75 030 SE 2.75 8.00 0.00 12.23 2.00 Oct NO.HAULS 4
4 20 4
32 CPUE 0.25 1.00 2.70 2.25 2.13 17-23 SE 0.25 1.00 2.17 2.25 1.38 Oct NO.HAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05/12/05 30
NORMANDEAU ASSOCIATES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo Yellow perch Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.25 0.50 2.15 1.00 1.56 11-17 Jul SE 0.25 0.29 0.89 0.41 0.57 NO.11AULS 4
4 20 4
32 CPUE 0.00 3.75 1.35 1.25 1.47 25-31 SE 0.00 2.25 0.62 0.95 0.50 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 2.75 2.70 5.75 2.75 08-14 SE 0.00 2.75 1.32 4.09 1.02 Aug NO.IIAULS 4
4 20 4
32 CPUE 3.50 2.25 0.75 4.25 1.72 21-28 SE 2.53 2.25 0.32 1.65 0.52 Aug NO.1IAULS 4
4 20 4
32 CPUE 2.75 1.25 0.70 2.25 1.22 05-11 SE 1.11 0.75 0.45 1.65 0.39 Sep NO.IIAULS 4
4 20 4
32 CPUE 8.25 1.00 1.30 1.50 2.16 19-25 SE 3.47 0.00 0.67 0.87 0.70 Sep NO.IIAULS 4
4 20 4
32 CPUE 1.00 0.50 2.30 1.75 1.84 03-09 Oct SE 1.00 0.29 1.58 1.03 1.00 Oct NO.ItAULS 4
4 20 4
32 CPUE 2.00 1.00 1.50 0.50 1.38 17-23 Oct SE 0.82 0.41 0.49 0.50 0.34 Oct NO.IAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05/12,'05 31
NORMANDEAU ASSOCIATES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo Largemouth bass Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.00 0.25 0.35 0.25 0.28 11-17 SE 0.00 0.25 0.15 0.25 0.10 Jul Jul NO.IlAULS 4
4 20 4
32 CPUE 1.00 1.25 1.15 1.50 1.19 25-31 SE 1.00 1.25 0.65 1.19 0.46 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.50 0.55 1.75 0.63 08-14 0.00 0.29 0.18 1.44 0.21 Aug SNO.HgIAULS 4
4 20 4
32 CPUE 1.25 0.25 0.60 0.50 0.63 21-28 SE 1.25 0.25 0.23 0.29 0.21 Aug NO.ItAULS 4
4 20 4
32 CPUE 0.00 0.25 0.70 0.75 0.56 05-11 0.00 0.25 0.26 0.48 0.18 Sep S
Sep NO.IIAULS 4
4 20 4
32 CPUE 0.50 2.00 0.20 0.75 0.53 19-25 SE 0.50 1.68 0.09 0.48 0.23 Sep NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.25 0.35 0.50 0.31 03-09 Oct SE 0.00 0.25 0.13 0.29 0.09 Oct NO.HAULS 4
4 20 4
32 CPUE 0.00 0.00 0.25 0.00 0.16 17-23 Oct SE 0.00 0.00 0.12 0.00 0.08 Oct NO.HAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05/12/05 32
NORMA NDEA UASSOCIA TES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo Rock bass Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.00 0.00 0.05 0.00 0.03 11-17 SE 0.00 0.00 0.05 0.00 0.03 Jul NO.IAULS 4
4 20 4
32 CPUE 0.00 0.75 0.05 0.00 0.13 25-31 SE 0.00 0.25 0.05 0.00 0.06 Jul NO.IMAULS 4
4 20 4
32 CPUE 0.25 0.00 0.25 0.25 0.22 08-14 SE 0.25 0.00 0.16 0.25 0.11 Aug NO.HAULS 4
4 20 4
32 CPUE 2.50 0.25 0.20 0.75 0.56 21-28 SE 1.89 0.25 0.16 0.48 0.27 Aug NO.HAULS 4
4 20 4
32 CPUE 2.25 2.00 0.00 0.75 0.63 05-11 SE 1.93 1.08 0.00 0.75 0.30 Sep NO.HAULS 4
4 20 4
32 CPUE 2.25 0.75 0.10 0.00 0.44 19-25 SE 1.31 0.48 0.07 0.00 0.21 Sep NO.HAULS 4
4 20 4
32 CPUE 1.00 0.75 0.00 0.25 0.25 03-09 Oct SE 1.00 0.48 0.00 0.25 0.14 Oct NO.HAULS 4
4 20 4
32 CPUE 0.25 0.50 0.00 0.00 0.09 17-23 Oct SE 0.25 0.50 0.00 0.00 0.07 Oct NO.HAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05112M05 33
NORMA NDEA UASSOCIA TES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo Spottail shiner Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.50 0.00 0.05 0.00 0.09 11-17 1-SE 0.50 0.00 0.05 0.00 0.07 NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.25 0.05 0.50 0.13 25-31 SE 0.00 0.25 0.05 0.50 0.07 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 2.50 0.15 0.00 0.41 08-14 0.00 2.18 0.15 0.00 0.29 Aug S
Aug NO.IIAULS 4
4 20 4
32 CPUE 2.25 0.25 0.10 0.00 0.38 21-28 SE 1.93 0.25 0.10 0.00 0.26 Aug NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 05-11 0.00 0.00 0.00 0.00 0.00 Sep S
Sep NO.HAULS 4
4 20 4
32 CPUE 0.50 0.00 0.05 2.25 0.38 19-25 SE 0.50 0.00 0.05 2.25 0.29 Sep NO.HAULS 4
4 20 4
32 CPUE 1.25 0.00 0.00 0.75 0.25 03-09 Oct SE 0.75 0.00 0.00 0.48 0.13 Oct NO.ltAULS 4
4 20 4
32 CPUE 1.00 0.25 0.05 0.00 0.19 17-23 Oct SE 0.71 0.25 0.05 0.00 0.10 Oct NO.HAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05/12,05 34
NORMA NDEA U ASSOCIATES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo Pum kinseed Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.00 0.50 0.40 0.75 0.41 11-17 Jul SE 0.00 0.50 0.21 0.75 0.17 NO.11AULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.50 0.06 25-31 Jul SE 0.00 0.00 0.00 0.29 0.04 NO.IlAULS 4
4 20 4
32 CPUE 0.00 0.00 0.05 0.25 0.06 08-SE 0.00 0.00 0.05 0.25 0.04 Aug S
NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.30 0.50 0.25 21-28 SE 0.00 0.00 0.16 0.50 0.12 Aug NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.25 0.30 0.00 0.22 SE 0.00 0.25 0.16 0.00 0.11 NO.IIAULS 4
4 20 4
32 CPUE 0.25 0.50 1.55 0.00 1.06 19-25 Sep SE 0.25 0.50 0.87 0.00 0.55 Sep NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.25 0.85 0.00 0.56 03-09 Oct SE 0.00 0.25 0.35 0.00 0.23 NO.HAULS 4
4 20 4
32 CPUE 0.25 0.75 0.20 0.00 0.25 17-23 Oct SE 0.25 0.75 0.16 0.00 0.13 Oct NO.HAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05/12/05 35
NORMA NDEA U ASSOCIATES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo Banded killifish Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.00 0.00 0.00 0.00 0.00 11-17 Jul SE 0.00 0.00 0.00 0.00 0.00 NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.25 0.00 0.00 0.03 25-31 SE 0.00 0.25 0.00 0.00 0.03 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 08-14 0.00 0.00 0.00 0.00 0.00 Aug SNO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00
-28 SE 0.00 0.00 0.00 0.00 0.00 Aug NO.IIAULS 4
4 20 4
32 CPUE 0.25 0.25 0.00 0.00 0.06 05-11 0.25 0.25 0.00 0.00 0.04 Sep SNO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 19-25 0.00 0.00 0.00 0.00 0.00 Sep SNO.HAULS 4
4 20 4
32 CPUE 0.00 0.50 0.00 1.00 0.19 03-09 Oct SE 0.00 0.50 0.00 1.00 0.14 NO.HAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 17-23 SE 0.00 0.00 0.00 0.00 0.00 NO.iHAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05112;05 36
NORMANDEAU ASSOCIATES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo Chain pickerel Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.00 0.00 0.20 0.00 0.13 11-17 SE 0.00 0.00 0.12 0.00 0.07 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.25 0.05 0.00 0.06 25-31 SE 0.00 0.25 0.05 0.00 0.04 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.15 0.00 0.09 08-14 SE 0.00 0.00 0.08 0.00 0.05 Aug NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.25 0.15 0.00 0.13 21-28 SE 0.00 0.25 0.11 0.00 0.07 Aug NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.25 0.10 0.00 0.09 05-11 0.00 0.25 0.07 0.00 0.05 Sep S
Sep NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.15 0.00 0.09 19-25 SE 0.00 0.00 0.11 0.00 0.07 Sep NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.20 0.00 0.13 03-09 Oct SE 0.00 0.00 0.12 0.00 0.07 Oct NO.IAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 17-23 Oct SE 0.00 0.00 0.00 0.00 0.00 Oct NO.HAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05/12/05 37
NORMA NDEA UASSOCIA TES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo White perch Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.00 0.00 0.00 0.00 0.00 J11 SE 0.00 0.00 0.00 0.00 0.00 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.25 0.03 25-31 SE 0.00 0.00 0.00 0.25 0.03 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 08-14 0.00 0.00 0.00 0.00 0.00 Aug SNO.ItAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 1.75 0.22 21-28 SE 0.00 0.00 0.00 1.18 0.17 Aug NO.ItAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 05-11 0.00 0.00 0.00 0.00 0.00 Sep S
Sep NO.1lAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 19-25 SE 0.00 0.00 0.00 0.00 0.00 Sep NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 03-09 Oct SE 0.00 0.00 0.00 0.00 0.00 NO.HAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 17-23 Oct SE 0.00 0.00 0.00 0.00 0.00 Oct NO.IIAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05112/05 38
NORMANDEA U ASSOCIATES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo White sucker Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.75 0.00 0.05 0.00 0.13 J11 SE 0.75 0.00 0.05 0.00 0.10 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.25 0.00 0.00 0.03 25-31 SE 0.00 0.25 0.00 0.00 0.03 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 SE 0.00 0.00 0.00 0.00 0.00 ug NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 21-28 SE 0.00 0.00 0.00 0.00 0.00 Aug NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 05-11 0.00 0.00 0.00 0.00 0.00 Sep S
Sep NO.ItAULS 4
4 20 4
32 CPUE 0.25 0.00 0.00 0.50 0.09 19-25 0.25 0.00 0.00 0.50 0.07 Sep S
Sep NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 03-09 Oct SE 0.00 0.00 0.00 0.00 0.00 Oct NO.HAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 17-23 Oct SE 0.00 0.00 0.00 0.00 0.00 Oct NO.IAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05/12/05 39
NORMANDEA U ASSOCIATES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo Northern pike Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.00 0.00 0.00 0.00 0.00 11-17 SE 0.00 0.00 0.00 0.00 0.00 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.25 0.00 0.50 0.09 25-31 SE 0.00 0.25 0.00 0.29 0.05 Jul 00 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 08-14 0.00 0.00 0.00 0.00 0.00 Aug S
Aug NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.10 0.00 0.06 21-28 SE 0.00 0.00 0.10 0.00 0.06 Aug NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 05-11 0.00 0.00 0.00 0.00 0.00 Sep S
Sep NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 19-25 SE 0.00 0.00 0.00 0.00 0.00 Sep NOMAULS 4
4 20 4
32 NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.50 0.06 03-09 Oct SE 0.00 0.00 0.00 0.50 0.06 NO.MAULS 4
4 20 4
32 CPUE 0.00 0.00 0.05 0.00 0.03 17-23Ot SE 0.00 0.00 0.05 0.00 0.03 NO.HAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05112/405 40
NORMANDEA U ASSOCIATES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo Smallmouth bass Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.00 0.00 0.00 0.00 0.00 Ju1 SE 0.00 0.00 0.00 0.00 0.00 Jul NO.IlAULS 4
4 20 4
32 CPUE 0.00 0.25 0.00 0.00 0.03 2u3 SE 0.00 0.25 0.00 0.00 0.03 Jul NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 08g SE 0.00 0.00 0.00 0.00 0.00 NO.IIAULS 4
4 20 4
32 CPUE 0.25 0.00 0.10 0.00 0.09 212 SE 0.25 0.00 0.10 0.00 0.07 NO.IIAULS 4
4 20 4
32 CPUE 0.25 0.00 0.00 0.00 0.03 0ep SE 0.25 0.00 0.00 0.00 0.03 Sep S
NO.IlAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 Se2 SE 0.00 0.00 0.00 0.00 0.00 NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 03-09 Oct SE 0.00 0.00 0.00 0.00 0.00 NO.H1AULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 17-23 Oct SE 0.00 0.00 0.00 0.00 0.00 Oct NO.IIAULS 4
4 20 4
32 (continued) 2004 Juvenile Shad Bulletin 82.doc 05/12/05 41
NORMANDEAU ASSOCIATES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo Tesselated darter Brattleboro Cersosimo Vernon Lake All Reaches CPUE 0.25 0.00 0.00 0.00 0.03 11-17 Jul SE 0.25 0.00 0.00 0.00 0.03 NO.liAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 25-31 SE 0.00 0.00 0.00 0.00 0.00 Jul NO.IlAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 08-14 0.00 0.00 0.00 0.00 0.00 Aug SNO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 21-28 SE 0.00 0.00 0.00 0.00 0.00 Aug NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 05-11 Sep SE 0.00 0.00 0.00 0.00 0.00 Sep NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 19-25 0.00 0.00 0.00 0.00 0.00 Sep S
Sep NO.ItAULS 4
4 20 4
32 CPUE 0.00 0.00 0.05 0.00 0.03 03-09 Oct SE 0.00 0.00 0.05 0.00 0.03 Oct NO.IIAULS 4
4 20 4
32 CPUE 0.00 0.00 0.00 0.00 0.00 17-23 Oct SE 0.00 0.00 0.00 0.00 0.00 Oct NOMlAULS A
4 20 4
32 (continued) 2004 Juivenile Shad IBullefin 82.doc 05/12,D54 42
NORMANDEA U ASSOCIATES INC.
Table 5. (Continued) 2004 Week and Taxon VERNON POOL REGION Cersosimo All Taxa Brattleboro Cersosimo Vernon Lake All Reaches CPUE 1.75 1.50 5.40 10.00 5.03 11-17 Jul SE 0.75 0.65 1.46 6.18 1.22 NO.HAULS 4
4 20 4
32 CPUE 1.00 10.25 4.25 16.75 6.16 25-31 SE 1.00 5.99 1.48 9.29 1.74 Jul Jul NO.IlAULS 4
4 20 4
32 CPUE 0.50 7.50 8.35 32.75 10.31 08-14 0.50 5.87 1.96 18.79 2.95 Aug SNO.ItAULS 4
4 20 4
32 CPUE 11.75 4.25 10.50 42.50 13.88 212 SE 3.35 2.66 2.84 14.99 3.16 NO.IIAULS 4
4 20 4
32 CPUE 6.75 14.00 12.60 26.50 13.78 05-11 E
3.94 6.01 3.30 12.69 2.76 Sep S
Sep NO.HAULS 4
4 20 4
32 CPUE 13.25 10.00 14.65 41.75 17.28 19-25 SE 5.19 6.39 5.35 28.20 4.92 Sep NO.IIAULS 4
4 20 4
32 CPUE 6.75 11.50 13.55 72.25 19.78 03-09 Oct SE 6.10 9.31 3.10 39.63 6.08 NO.IIAULS 4
4 20 4
32 CPUE 5.50 5.00 11.80 22.00 11.44 17-23 Oct SE 2.40 3.39 4.78 21.01 3.88 Oct NO.HAULS 4
4 20 4
32 2004 Juvenile Shad Bullctin 82.doc 05/12,D5 43
NORMANDEAU ASSOCIATES INC.
Table 6.
Beach Seine Standing Crop Index (and Standard Error, SE) for Juvenile American Shad in Vernon Pool Regions of the Connecticut River, July - October 2004.
2004 Brattleboro Cersosimo Vernon Cersosimo Lake All Regions Week Index SE Index SE Index SE Index SE Index SE 11 - 17Jul 0
0 0
0 0
0 0
0 0
0 25 - 31 Jul 0
0 0
0 0
0 0
0 0
0 08 - 14 Aug 0
0 288 288 4668 4668 0
0 4956 4956 21 - 28 Aug 0
0 0
0 3247 3247 0
0 3247 3247 05-I1 Sep 207 207 0
0 203 203 0
0 410 410 19 - 25 Sep 0
0 0
0 0
0 0
0 0
0 03 - 09 Oct 0
0 0
0 7915 7712 0
0 7915 7712 17 - 23 ct 0
0 0
0 0
0 0
0 0
0 MEAN 26 26 36 36 2004 1979 0
0 2066 2041 NOTE: Standing Crop Index is the weekly mean estimated total number ofjuvenile American shad in each region.
2004 Juvenile Shad Bullcoin 82.doc 05/12105 44
NORMANDEAU ASSOCIATES INC.,
Table 7.
Comparison Standing Crop Index of Juvenile American Shad Abundance among Vernon Pool Regions of the Connecticut River during July - October 2000-2004.
Beach Seine Standing Crop Index in Region Year Brattleboro Cersosimo Cersosimo Lake Vernon Combined 2000 1,069 108 944 29,123 31,244 2001 0
216 61 2,156 2,433 2002 0
0 0
10,528 10,528 2003' 0
48 0
675 723 2004 26 36 0
2004 2066
'The standing crop index for 2003 is based on the beach seine catch only for comparability among years, even though some fish were caught by midwater trawl in the Brattleboro Region.
2004 Juvenile Shad Bulletin 82.doc 05112105 445
C C
C C3 CL CO CO CL C,
Lw Nh 01 Table 8.
Annual Juvenile American Shad Standing Crop Index and the Estimated Number of Adult Shad in Vernon Pool of the Connecticut River, 2000 through 2004.
June Daily Juvenile Average Shad Beach Seine Adult Shad Adult Shad Trucked from Combined Number River Flow Abundance Index Passed Upstream IHolyoke Lift and Stocked of Adult Shad at Vernon in Vernon at Vernon Dam' in Vernon Pool2 in Vernon Pool Year Dam (CFS)
Pool
- Males, Females' Total M1ales3 Females 3 Total Males Females Total 2000 8892 31244 632 168 800 474 533 1007 1106 701 1807 2001 10124 2433 1538 128 1666 31 40 71 1569 168 1737 2002 16075 10528 281 75 356 273 327 600 554 402 956 20034 6681 723 212 56 268 400 469 869 612 525 1137 2004 6852 2066 336 317 653 200 152 352 536 469 1005
'American shad upstream passage at Vernon Dam as reported in Normandeau 2002 (Bulletin No. 77). A ten-year average of 79% males (1990-2001, 2000 excluded) was used to estimate the sex composition of the run during 2000,2002 and 2003 because sex composition was not determined in those years. The shad run was also not sampled for biocharacteristics at Vernon Dam in 2004, so the percentage of females of 0.485 observed from the Cabot Station fishway during 2004 (Jan Rowan pers. Com. 22 Apr 05) was applied to the number passed at Vernon Dam in 2004.
2American shad numbers trucked as reported for 2000, 2001 and 2002 by Dr. Caleb Slater, Pers. Comm., 22 April 2002 and 14 April 2003, and by Mr. Ken Cox 6 April 2004 for 2003.
3Number of male and female adult American shad trucked were estimated from the overall sex ratio reported for the Holyoke lift in each year, Dr. Caleb Slater, Pers. Comm., 22 April 2002 (47.1% males in 2001), 14 April 2003 (45.5% males in 2002), 4 April 2004 (46% males in 2003), and 28 April 2005 (56.7% males in 2004).
4The standing crop index for 2003 is based on the beach seine catch only for comparability among years, even though some fish were caught by midwater trawl in the Brattleboro Region.
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