ASSESSMENT OF BLACK CRAPPIE AND WHITE PERCH IN HIGHLAND LAKE, STODDARD-WASHINGTON, NH (2014) New Hampshire
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1 ASSESSMENT OF BLACK CRAPPIE AND WHITE PERCH IN HIGHLAND LAKE, STODDARD-WASHINGTON, NH (2014) STATE: GRANT: GRANT TITLE: JOB 9: New Hampshire F-50-R-31 Anadromous and Inland Fisheries Operational Management Investigations Warmwater and Coolwater Fisheries Population Assessments PERIOD COVERED: July 1, 2014 June 30, 2015 PRINCIPAL INVESTIGATORS: Jason Carrier Fisheries Biologist I Gabriel Gries Fisheries Biologist II Warmwater Fisheries Research and Management Coordinator This project was funded in part by the purchase of fishing equipment and motorboat fuels through the Federal Sport Fish Restoration Program. 1
2 INTRODUCTION Highland Lake is located in the towns of Stoddard (Cheshire County) and Washington (Sullivan County), NH, and has a surface area of 288 hectares (712 acres). It is classified as mesotrophic with an average depth of 1.6 meters, a maximum depth of 9.6 meters, and is considered a warmwater fishery. Fish species present include: Black crappie (Pomoxis nigromaculatus), White perch (Morone Americana), Largemouth Bass (Micropterus salmoides), Smallmouth Bass (Micropterus dolomieui), Common White Sucker (Catostomus commersoni), Yellow Perch (Perca favescens), Pumpkinseed (Lepomis gibbosus), Redbreast Sunfish (Lepomis auritus), Chain Pickerel (Esox niger), Fallfish (Semotilus corporalis), Brown Bullhead (Ameiurus nebulosus), Eastern Creek Chubsucker (Erimyzon oblongus), and Golden Shiner (Notemigonus crysoleucas). Black Crappie were stocked by the New Hampshire Fish and Game Department (NHFGD) in 1992 into Halfmoon Pond, Washington, which flows into Highland Lake. Based on NHFGD field surveys, Black Crappie made their way into Highland Lake sometime between 1997 and White Perch have been present in the lake since the early 1980 s, but further details are lacking. During a winter creel survey on Highland Lake in 2013, it was brought to the NHFGD s attention that the White Perch fishing has declined in recent years. The NHFGD currently has limited data on Black Crappie and White Perch populations. White Perch are an important sport fish in New Hampshire during winter. Black Crappie have quickly become a very popular sport fish in NH in recent years. Accordingly, it is important for the NHFGD to learn more about their populations, age, and growth, in order to better manage these fisheries. METHODS From April 28 to May 16, 2014, five New Hampshire design fyke nets were fished in Highland Lake, Stoddard/Washington in order to assess Black Crappie and White Perch populations (Figure 1). Nets were set in areas to intercept Black Crappie and White Perch during their prespawning to spawning movements. Nets were checked seven times. Net number 5 was pulled on the fifth day of checking nets due to lack of fish being captured. Black Crappie and White Perch, along with any black bass (largemouth bass and smallmouth bass), were measured to the nearest millimeter, total length (TL), weighed to the nearest gram, marked (upper caudal fin clip on unclipped fish to identify recaptures), and checked for fin clips. For aging purposes, scale samples were taken from Black Crappie, White Perch, and black bass in the region below the lateral line and slightly posterior to the pectoral fin on the left side of the fish. Scale samples were taken from a subsample (a maximum of 5 fish per 10 mm size class) of each speceis. Scales were cataloged, then permanently recorded in an acetate impression and aged using an Eyecom 1100 microfiche projector. Fish were processed shortly after capture and then released at least 200 yards from the fyke net. In this report, only fish aged as < 6 years of 2
3 age and having scales with ageing confidence ratings of 1 or 2 (very confident or confident) were analyzed. Proportional Stock Density (PSD) measures for Black Crappie, White Perch, and black bass were determined according to length categories (based on total length) described in Gablehouse (1984): for Black Crappie and White Perch: stock mm; quality mm; preferred mm; memorable mm; and trophy > 380 mm; for Smallmouth Bass: stock mm; quality mm; preferred mm; memorable mm; and trophy > 510 mm; for Largemouth Bass: stock mm; quality mm; preferred mm; memorable mm; and trophy > 630 mm. PSD number of fish quality = number of fish stock 100 Confidence intervals were calculated for PSD estimates at the 80% confidence level using formulas based on Zar, J.H. (1984). A PSD value ranging from 30 to 60 indicates a balanced fish population for Black Crappie and White Perch; a balanced fish population is defined as one that is intermediate between the extremes of a large number of small fish and a small number of large fish and indicates that rates of recruitment, growth and mortality rates may be satisfactory (Gablehouse 1984). Values < 30 indicate an extreme number of small fish when compared to the number of large fish. Values > 60 indicate an extreme number of large fish when compared to the number of small fish. Relative weight (W r ) values were derived as a measure of condition of individual fish. Relative weight values were calculated for Black Crappie 100 mm (TL), White Perch 80 mm (TL), and black bass 150. This index compares the actual weight of an individual (W) with a standard weight (W s ) for a fish of the same length: W r = W/W s 100 The standard weight equation used for Black Crappie was log 10 W s (g) = x log 10 TL (mm), proposed by Neumann and Murphy (1991). The equation used for White Perch was log 10 W s (g) = x log 10 TL (mm), proposed by Bister et al (2000). The equation used for Largemouth Bass was log 10 W s (g) = x log 10 TL (mm), proposed by Wege and Anderson (1978). The equation used for Smallmouth Bass was log 10 W s (g) = x log 10 TL (mm), proposed by Kolander et al. (1993). Relative weight values > 90 may be considered good, with values > 100 considered excellent. Schumacher population estimators (multiple mark and multiple recapture) were used to estimate population size of target species (Ricker 1975) and associated 95% confidence intervals. All reported mean values include estimated standard deviations, unless otherwise noted. Linear regression was used to examine the relationship of fish total length to relative weight. The level of significance for all statistical analyses was
4 RESULTS A total of 505 Black Crappie were sampled (Figure 2). The PSD for Black Crappie was 77 (lower and upper 80% CI s: 75, 80; Table 1) compared to the statewide mean of 70. Mean relative weight values for Black Crappie were calculated by length category (Table 2). Mean relative weight values for Black Crappie were similar for stock size fish and lower for quality, preferred, and memorable size fish when compared to statewide mean values. The relationship between Black Crappie total length and relative weight was significant with a negative trend (P = 0.03; R 2 = ; Figure 2), but should be interpreted with caution due to the extremely low R 2 value. Mean back-calculated length at age, total number of fish aged, logarithmic trendline correlation coefficient, and age at quality size for Black Crappie are presented in Table 3 and Figure 3. Black Crappie took an average of 3.45 years to reach quality size (200 mm). No comparison was made to a statewide average due to lack of Black Crappie age and growth data. The Schumacher population estimate of Black Crappie in Highland Lake during the spring 2014 sampling period with associated 95% confidence intervals was 7,538 (CI:4,527 22,511). This estimate should be interpreted with caution due to the wide confidence intervals. A total of 45 White Perch were sampled (Figure 4). Mean relative weight values for White Perch were calculated by length category (Table 4). Mean relative weight values for White Perch were above average for quality and preferred size fish when compared to statewide mean values. No stock size fish were sampled. White Perch PSD values and growth data were not compared or categorized, and population estimates were not calculated due to low sample size. A total of 17 Largemouth Bass were sampled (Figure 5). Mean relative weight values for Largemouth Bass were calculated by length category (Table 5). Mean relative weight values for Largemouth Bass were below average for stock and preferred size fish when compared to statewide mean values. No quality size fish were sampled. Largemouth Bass PSD values and growth data were not compared or categorized, and population estimates were not calculated due to low sample size. A total of 8 Smallmouth Bass were sampled (Figure 6). Mean relative weight values for Smallmouth Bass were calculated by length category (Table 6). Mean relative weight values for Smallmouth Bass were above average for stock, below average for quality, and similar for preferred size fish when compared to statewide mean values. Smallmouth Bass PSD values and growth data were not compared or categorized, and population estimates were not calculated due to a low sample size. Fish species captured, but not processed included: Common White Sucker (Catostomus commersoni), Yellow Perch (Perca favescens), Pumpkinseed (Lepomis gibbosus), Chain Pickerel (Esox niger), Fallfish (Semotilus corporalis), Brown Bullhead (Ameiurus nebulosus), Eastern Creek Chubsucker (Erimyzon oblongus), and Golden Shiner (Notemigonus crysoleucas). 4
5 DISCUSSION For Black Crappie, a PSD value ranging from 30 to 60 indicates a structurally balanced population. Values < 30 indicate an extreme number of small fish when compared to the number of large fish. Values > 60 indicate an extreme number of large fish when compared to the number of small fish. The PSD value calculated for Black Crappie in Highland Lake was 77, indicating an unbalanced population with an extreme number of large fish when compared to the number of small fish (Table 1). Relative weight values > 90 may be considered good, with values > 100 considered excellent. One of the four Black Crappie size categories had Wr values > 90 (Table 2). Two of the three size categories for White Perch had Wr values > 90 (Table 4). Two of the three size categories for Largemouth Bass had Wr values > 90 (Table 5). One of the four size categories for Smallmouth Bass was > 100 and the other three categories were <90 (Table 6). Observed values are acceptable from a management standpoint, as no exceptional values were documented. RECOMMENDATIONS The NHFGD should continue to assess Black Crappie and White Perch populations throughout the state and continue to update the statewide database. This database will allow biologists to target specific water bodies for more detailed assessments and make well-informed management recommendations to preserve and improve the quality of Black Crappie and White Perch populations state-wide. ACKNOWLEDGMENTS We would like to thank Ed Massucco and Rodney Ebinhausen for their assistance in this study. 5
6 6
7 LITERATURE SITED Bister, T. J., D. W. Willis, and M. L. Brown Proposed Standard Weight (W s ) Equations and Standard Length Categories for 18 Warmwater Nongame and Riverine Fish Species. North American Journal of Fisheries Management 20: Gabelhouse, D. W., Jr An assessment of crappie stocks in small Midwestern private impoundments. North American Journal of Fisheries Management 4: Kolander, T. D., D. W. Willis, and B. R. Murphy Proposed revision of the standard weight equation for Smallmouth Bass. North American Journal of Fisheries Management 13: Neuman, R. M., and B. R. Murphy Evaluation of the relative weight (W r ) index for assessment of white crappie and black crappie populations. North American Journal of Fisheries Management 11: Racine, M Warmwater population assessments in New Hampshire: black bass trend analysis ( ). F-50-R-22 Federal Aid in Sportfish Restoration Performance Report. Concord, NH. Ricker, W. E Computation and interpretation of biological statistics of fish populations. Bulletin 191- Department of Fisheries and Oceans. Ottawa, Canada. Wege, G. J. and R. O. Anderson Relative weight: a new index of condition for Largemouth Bass. New approaches to the management of small impoundments. Special publication 5., North Central Division, American Fisheries Society. Washington, D.C. Zar, J.H. Biostatistical analysis Prentice-Hall, Inc, NJ. 718 pp. 7
8 Table 1. Proportional Stock Density (80% confidence intervals) of Black Crappie assessed in Highland Lake Water body Sample Lower CI PSD Upper CI > Quality > Stock Date 80% 80% Size Size Highland Lake May Table 2. Sample size, mean relative weight value and one standard deviation by length category for Black Crappie assessed in Highland Lake a. Total Length Interval (mm) Stock Quality Preferred Memorable Sample Water body Date n Wr SD n Wr SD n Wr SD n Wr SD Highland Lake May Statewide average a a a a n represents the number of waterbodies (some waterbodies provided more than one sample) 8
9 Table 3. Mean back-calculated length at age, total number of fish aged, logarithmic trendline correlation coefficient and age at quality size for Black Crappie in Highland Lake Maximum Number of fish aged Age at quality Sample age used for Mean back-calculated length (mm) at age size Water body Year(s) Species back-calculations >1 5-6 R 2b 200 mm Highland Lake 2014 BC b. Correlation coefficient for logarithmic trendline. Table 4. Sample size, mean relative weight value and one standard deviation by length category for White Perch assessed in Highland Lake Total Length Interval (mm) Stock Quality Preferred Memorable Sample Waterbody Date n Wr SD n Wr SD n Wr SD n Wr SD Highland Lake May Statewide average a a a a a. n represents the number of waterbodies (some waterbodies provided more than one sample) 9
10 Table 5. Sample size, mean relative weight value and one standard deviation by length category for Largemouth Bass assessed in Highland Lake a. b. Total Length Interval (mm) Stock Quality Preferred Memorable Sample Water body Date n Wr SD n Wr SD n Wr SD n Wr SD Highland Lake May Statewide average a b b b b Reprinted from Racine (2006). n represents the number of waterbodies. Table 6. Sample size, mean relative weight value and one standard deviation by length category for Smallmouth Bass assessed in Highland Lake Total Length Interval (mm) Stock Quality Preferred Memorable Sample Water body Date n Wr SD n Wr SD n Wr SD n Wr SD Highland Lake May Statewide average a b b b b a. b. Reprinted from Racine (2006). n represents the number of waterbodies. 10
11 Figure 1. Fyke net locations on Highland Lake
12 200 BC Length Frequency Number of Fish Total Length (mm) R² = Relative Weight (Wr) Length (mm) Figure 2. Length-frequency distribution (n = 505) and relationship of total length to relative weight (Wr; n = 409) for Black Crappie assessed in Highland Lake
13 TL (mm) Highland Lake Spring Netting 2014 BC back-calculated length at age y = ln(x) R² = Age (years) Highland Lake Spring 2014 Log. (Highland Lake Spring 2014) Figure 3. Average back-calculated length at age for Black Crappie sampled in Highland Lake in 2014 (+ 1 SD), and corresponding logarithmic trendline and equation. 13
14 WP Length Frequency Number of Fish Total Length (mm) Figure 4. Length frequency distribution (n = 45) for White Perch assessed in Highland Lake Number of Fish LMB Length Frequency Total Length (mm) Figure 5. Length frequency distribution (n = 17) for Largemouth Bass assessed in Highland Lake
15 SMB Length Frequency 3 Number of Fish Total Length (mm) Figure 6. Length frequency distribution (n = 8) for Smallmouth Bass assessed in Highland Lake
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