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Showing 1 to 20 of 26 for “"forage fish"”.
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Forage Fish Populations and Growth of Muskellunge in a South Dakota Power Plant Cooling Reservoir
… crop, age, growth, and impingement loss of forage fishes and the growth rate and impingement loss of muskellunge (Esox masquinongy) were studied to evaluate the use of the Big Stone Power Plant cooling reservoir as an area for rearing and holding muskellunge brood stock. There were 18 …
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Compatibility and complementarity of alewife (Alosa pseudoharengus) and gizzard shad (Dorosoma cepedianum) as forage fish in Smith Mountain Lake, Virginia
… of alewife and gizzard shad as coexistent forage fishes for striped bass (Morone saxatilis), walleye (Stizostedion vitreum vitreum) and largemouth bass (Micropterus salmoides) were evaluated in Smith Mountain Lake, an 8,337 ha hydroelectric impoundment in south-central Virginia. Alewife and …
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Diet, growth and bioenergetics of Northern Pike (Esox lucius Linnaeus, 1758) in Box Canyon Reservoir, Pend Oreille River, Washington
… the mass and total numbers of each species of forage fish the northern pike population consumed in Box Canyon Reservoir,Pend Orielle River, Washington. Northern pike (n=328) were collected by boat electrofishing, fyke netting, angling and gillnetting in 2009 and 2010. All northern pike were …
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Environmental drivers of the abundance and distribution of forage fishes on the Northeast US shelf, with a particular emphasis on northern sand lance
Small pelagic fishes, also termed forage fishes, represent a critical link between secondary production and myriad top predators in marine ecosystems, including the Northeast US shelf. In this dissertation, I analyze the drivers of forage fish distribution throughout the Northeast US shelf and the …
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Environmental drivers of the abundance and distribution of forage fishes on the Northeast US shelf, with a particular emphasis on northern sand lance
Small pelagic fishes, also termed forage fishes, represent a critical link between secondary production and myriad top predators in marine ecosystems, including the Northeast US shelf. In this dissertation, I analyze the drivers of forage fish distribution throughout the Northeast US shelf and the …
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Survival, Growth, and Food Habits of Brook Trout Introduced Into An Eastern South Dakota Stream
… most numerous organisms in trout stomachs while forage fish comprised the greatest volume of organisms in the stomachs. Trichoptera, Ephemeroptera, and Diptera were the predominate organisms found in benthos samples collected for forage ratio determinations. Forage ratios for the different orders …
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Uptake of Mercury and Relationship to Food Habits of Selected Fish Species in the Shenandoah River Basin, Virginia
… poses significant challenges to human health and fisheries management. Historical industrial practices in Waynesboro, Virginia left portions of the Shenandoah River basin contaminated with mercury and stringent health advisories for fish consumption. I investigated processes affecting the …
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Evaluation of a Power Plant Reservoir as a Fingerling Walleye Rearing Facility
… vitreum vitreum). Percent of stocked fish harvested was 0.21% (1,874 fish) in 1986 and 0.02% (129 fish) in 1987. Harvest was low because winterkill did not eliminate fish predators from the evaporation pond. Harvested fingerlings averaged 133.0 mm± 4.4 mm (SE) and 122.7 mm± 2.9 mm in …
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Environmental impact of stocked Mulloway (Argyrosomus japonicus) in New South Wales estuaries
… key habitats and migratory patterns of stocked fish; to evaluate the diet and growth of stocked fish and recruitment to commercial fisheries; and to develop a numerical model to estimate optimal stocking density from the predatory impact of stocked fish. The 10-step responsible approach to …
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Food, Growth, and Reproduction of White Crappies (Pomixis Annularis) and Black Crappies (P. Nigromaculatus) in Lake Poinsett, South Dakota
… plankton1o crustaceans, 25.2 % insects, 14.5 % fish, and 1.3 % miscellaneous organisms. The food volume of 39 adult black crappies consisted of 39.0 % planktonic crustaceans, 3.5 % insects, 57.8 % fish, and 0.7 % miscellaneous organisms. Both species selected Daphnia pulex over other zooplankton …
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Environmentally-Driven Variation in the Population Dynamics of Gulf Menhaden (<i>Brevoortia patronus</i>)
… (<em>Brevoortia patronus</em>) is an abundant forage fish distributed throughout the Northern Gulf of Mexico (NGOM). Gulf Menhaden support the second largest fishery, by weight, in the United States and represent a key linkage between upper and lower trophic levels. Variation in the population …
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Evaluating the effects of rainbow smelt on native piscivores in freshwater systems with a special focus on walleye recruitment and larval bioenergetics
… such impacts on piscivores and only serve as a forage fish. In a literature review, I exploredrainbow smeltinteractions withthree different piscivore species, Atlantic salmon (Salmo salar), lake trout (salvelinus namaycush) and walleye (Sander vitreus). Differences in larval rearing strategies …
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First Year Growth and Survival of Walleyes in Power Plant Evaporation and Holding Reservoirs
… vitreum) were stocked at a rate of 88 fish/hectare in two South Dakota power plant reservoirs and their growth and survival were monitored for one year. Length, weight, and survival of walleyes were significantly (P < 0.05) different between the two reservoirs. The walleyes attained a …
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Linking Prey to Predator: Scale Dependence and Oceanographic Influence in Marine Food Webs
… scale, combining novel technologies including fisheries acoustics, real time oceanographic sensors, and digital tags allows examination of decisions made by an individual foraging whale. In the Gulf of Mexico, fish distributions at fine scales (both horizontal and vertical) were examined …
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The influence of submerged aquatic vegetation on trophic relationships of largemouth bass
… weight of adult largemouth bass and vegetation. Forage fish abundance was also positively related to vegetation density. Vegetation was heavily utilized by most fish species in the reservoir. Consumption (quantity and diet composition) of individual largemouth bass did not differ among the …
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Assessment of the Response of Piscivorous Sportfishes to the Establishment of Gizzard Shad in Claytor Lake, Virginia
… Largemouth bass and walleye were the only sportfish to show increases in relative abundance. Benefits of gizzard shad as a forage fish appear to be limited to striped bass and its hybrid species. It is possible that gizzard shad have had, directly or indirectly, an adverse impact on the black …
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The diet and foraging ecology of chick-rearing gannets on the Namibian islands in relation to environmental features : a study using telemetry
… scavenged hakes Merluccius spp and naturally foraged saury Scomberesox saw'us dominated the diet by both contribution to mass (35 and 34 %, respectively) and frequency of occurrence (34 and 25 %, respectively). In a significant contrast, juvenile horse mackerel Trachurus trachurus capensis (40 …
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The foraging ecology of minke whales (Balaenoptera acutorostrata) in Northeast Scottish waters using stable isotope analysis
… linking their ecology to commercially important fisheries for sand eel. These findings emphasise the need for adaptive management of the Scottish MPA network to account for seasonal prey availability and to ensure that populations of ecologically important forage fish remain sufficient to meet …
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Trophic ecology of an introduced, land-locked alewife (Alosa pseudoharengus) population and assessment of alewife impact on resident sportfish and crustacean zooplankton communities in Claytor Lake, Virginia
… ecology of an introduced (1968- 1969) alewife forage base and resident sportfishes (age 0 and older) indicated several negative trophic interactions within the community complex of Claytor Lake, Virginia. Alewife piscivority represents a potentially significant adverse impact on sportfish …
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Re-Establishing Bald Eagle and Osprey Breeding Populations in South Dakota Through Hacking: A Feasibility Study
… based on the number and abundance of potential forage species, foraging habitat and nesting substrate quality, and the amount of human activity. Aerial and ground surveys, aerial photographs, the literature, and interviews with wildlife and fisheries personnel were used in assessments. Nesting …
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