Factors Affecting the Sport Fishery in a Multiple-use Virginia Reservoir

Ney, John J.; Moore, Christopher; Tisa, Mark S.; Yurk, Jeffrey J.; Neves, Richard J.

doi:10.1080/07438149009354692

Cited by 13 publications

(11 citation statements)

References 17 publications

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“…Similar to correlations computed for growth, relations between W r and environmental variables were linear. Chlorophyll a, an indicator of algal biomass, is an important factor affecting sport fish production and angler harvest (Jones and Hoyer 1982) and is positively related to primary productivity and available prey (Ney et al 1990). Therefore, greater fish condition would be expected in reservoirs with higher primary productivity.…”

Section: Conditionmentioning

confidence: 99%

Factors Related to Growth and Condition of the Alabama Subspecies of Spotted Bass in Reservoirs

Dicenzo

Maceina

Reeves

1995

North American Journal of Fisheries Management

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Growth and condition were estimated for Alabama spotted bass Micropterus punctulatus henshalli from 10 Alabama reservoirs. Faster growth to 300 mm total length (TL) was associated with higher levels of chlorophyll a, alkalinity, and conductivity, and with reservoirs at lower elevation with minimal water level fluctuations. Drainage area, alkalinity, and lower Secchi depth transparency were related to time for spotted bass to reach memorable size (430 mm TL). Spotted bass grew to 300 mm and 430 mm TL faster in eutrophic reservoirs. Relative weights (Wr) of various length categories were positively related to drainage area, chlorophyll a, alkalinity, conductivity, and the morphoedaphic index, and were negatively correlated with Secchi disk transparency. Spotted bass from eutrophic reservoirs expressed higher values of Wr than fish from oligo‐mesotrophic systems. Correlations between growth and Wr were not significant for some length categories of spotted bass. Because growth of largemouth bass Micropterus salmoides and spotted bass is nearly identical until age 5, a single length limit might be used to manage the populations in Alabama reservoirs, rather than the multiple length limits sometimes used for sympatric populations elsewhere.

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Section: Conditionmentioning

confidence: 99%

Factors Related to Growth and Condition of the Alabama Subspecies of Spotted Bass in Reservoirs

Dicenzo

Maceina

Reeves

1995

North American Journal of Fisheries Management

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“…I believe the 1980 sample of the fish community was similar to the pre-Libby Dam community, based on the delayed latent effects of impoundment (Baxter 1977, Yurk and Ney 1989, Ney et al 1990, Ney 1996. Apparently changes within the ecosystem after impoundment were less tolerable to the insectivore than the omnivore because the fish community sampled in 1994 indicated a shift to a biomass dominance of largescale sucker and substantially fewer mountain whitefish, while the total catch of each decreased.…”

Section: Discussionmentioning

confidence: 97%

“…The aging process within reservoirs of the eastern USA is fairly well understood (Baxter 1977, Yurk and Ney 1989, Ney et al 1990, Ney 1996, but less is known of the process in reservoirs of the western USA and the main stem rivers downstream. Typically new reservoirs are not stable and are closer to riverine systems in productivity, but as they age the systems change because of nutrient binding in bottom sediments.…”

Section: Introductionmentioning

confidence: 99%

Changes in the Species Composition of the Fish Community in a Reach of the Kootenai River, Idaho, after Construction of Libby Dam

Paragamian¹

2002

Journal of Freshwater Ecology

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I evaluated fish community structure and the density and growth of mountain whitefish (Prosopium williamsoni) downstream of Libby Dam in a 1 .O-km reach of the Kootenai River, Idaho, in 1994 and compared the results with those of a similar study in 1980, after closure of the dam. In 1980 seven species of fish were collected; mountain whitefish comprised 70% of the sample (42% by weight), and largescale sucker (Catostomus macrocheilus) represented 19% of the sample (49% by weight). In 1994 of the eight species caught, mountain whitefish represented only 40% by number (19% by weight), and the largescale sucker was 65% of the sample (70% by weight)

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“…Study site.-Smith Mountain Lake, an 8,350-ha pump-storage hydroelectric reservoir, is located about 20 km southeast of Roanoke, Virginia (Figure 1). For limnological characteristics of the res-ervoir, see Ney et al (1990). Ecologically, the system has a varied assemblage of native and introduced fish species (Hart 1978).…”

Section: Methodsmentioning

confidence: 99%

“…The decrease in the 1990s occurred long after the 65% reduction in phosphorus levels between 1975 and 1980, subsequent to the 1975 completion of an advanced wastewater treatment plant on the Roanoke River. Ney et al (1990) primarily attributed the decline of clupeid and total fish standing stocks in SML during the 1980s to lowered phosphorus levels. Since 1979, however, nutrient levels in the system have remained stable.…”

Section: Predator-prey Balancementioning

confidence: 99%

Estimation of Surplus Biomass of Clupeids in Smith Mountain Lake, Virginia

Cyterski

Ney

Duval

2003

Transactions of the American Fisheries Society

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Mean annual estimates of the surplus biomass of alewives Alosa pseudoharengus and gizzard shad Dorosoma cepedianum in Smith Mountain Lake, Virginia, were calculated from data on the biomass, growth, and mortality of each clupeid species. Surplus biomass, defined as production over a given time period minus the difference in biomass at the end and beginning of the time period, was determined for each cohort of both prey species. Mean total alewife biomass estimated from hydroacoustic surveys during 1993-1998 was 37 kg/ha. Mean total gizzard shad cove rotenone biomass from 1990 to 1997 was 89 kg/ha. When biomass was coupled with estimated growth and mortality rates, mean annual surplus biomass summed across all cohorts was 74 kg/ha for alewives and 116 kg/ha for gizzard shad. The surplus biomass of alewives barely meets piscivore demand (primarily that of largemouth bass Micropterus salmoides and striped bass Morone saxatilis), whereas predator demand might exceed gizzard shad surplus biomass when prey availability is taken into account.

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Factors Affecting the Sport Fishery in a Multiple-use Virginia Reservoir

Cited by 13 publications

References 17 publications

Factors Related to Growth and Condition of the Alabama Subspecies of Spotted Bass in Reservoirs

Factors Related to Growth and Condition of the Alabama Subspecies of Spotted Bass in Reservoirs

Changes in the Species Composition of the Fish Community in a Reach of the Kootenai River, Idaho, after Construction of Libby Dam

Estimation of Surplus Biomass of Clupeids in Smith Mountain Lake, Virginia

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