Global ETD Search
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Showing 1 to 20 of 67 for “"shad"”.
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Some aspects of trophic relations of gizzard shad, Dorosoma cepedianum
… feeding, voidance, and bioenergetics of gizzard shad were investigated. Ten of the 17 most frequently occurring plankters in Smith Mountain Reservoir were utilized as food: the bulk of the diet consisted of Glenodinium, Dinobryon, and copepod nauplii. The feeding behavior of shad was described. …
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Genetic evaluation of American shad Alosa sapidissima restoration success in James River, Virginia
The American shad Alosa sapidissima has experienced severe declines throughout its native range due to habitat degradation, fragmentation, and over-fishing. Hatchery supplementation is often used for stock restoration, but the effects of supplementation on population structure and genetic diversity …
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Over-Winter Mortality Of Gizzard Shad (Dorosoma Cepedianum) In Oneida Lake, New York
… to develop a conceptual model of gizzard shad over-winter mortality in Oneida Lake. Gizzard shad exhibited high mortality rates as water temperatures declined prior to ice formation and are highest at temperatures less than 4 degrees C. Habitat sampling demonstrated that shad congregate in …
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Trophic interactions between larval gizzard shad and resident zooplanktivores in Claytor Lake, Virginia
Anglers unlawfully introduced gizzard shad Dorosoma cepedianum into Claytor Lake, Virginia in the late 1980s, apparently with the intention of improving the sportfishery by adding an additional clupeid prey resource. This study examined the trophic interactions between larval shad and resident …
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Migratory patterns of American shad (Alosa sapidissima) revealed by natural geochemical tags in otoliths
… of river-specific signatures in American shad (Alosa sapidissima), an anadromous clupeid native to the Atlantic coast of North America, stable isotope and elemental ratios in otoliths of juvenile American shad produced accurate natal tags from 12 rivers. Significant inter-annual …
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CHARACTERIZATION OF MICROSATELLITE LOCI AND PILOT POPULATION GENETIC ANALYSIS IN HICKORY SHAD, ALOSA MEDIOCRIS
The hickory shad (Alosa mediocris) is a relatively understudied species of the anadromous fish sub-family Alosinae. This study, the first population genetic analysis of this species, employed 12 neutral microsatellite loci to estimate genetic diversity and population structure in tributaries of …
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Influence of Gizzard Shad on Fish Community Ecology in Northeastern South Dakota Glacial Lakes
… as an important sport fish themselves. Gizzard shad Dorosoma cepedianum are also an ecologically important species in many of the systems in which they occur. South Dakota is at the northwestern edge of the native range of gizzard shad and overwinter survival of shad is often limited. However, …
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Migratory patterns of American shad (Alosa sapidissima) revealed by natural geochemical tags in otoliths
… of river-specific signatures in American shad (Alosa sapidissima), an anadromous clupeid native to the Atlantic coast of North America, stable isotope and elemental ratios in otoliths of juvenile American shad produced accurate natal tags from 12 rivers. Significant inter-annual …
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Gizzard Shad Reproductive Biology and Predator-Prey Relations with Walleyes in Western South Dakota Reservoirs
Gizzard shad Dorosoma cepedianum were introduced into Angostura, Orman, and Shadehill reservoirs during the 1990s to potentially provide increased prey resources for walleye Sander vitreus. The objectives of this study were to assess gizzard shad reproductive biology and determine the extent to …
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Assessment of the Response of Piscivorous Sportfishes to the Establishment of Gizzard Shad in Claytor Lake, Virginia
Gizzard shad were illegally introduced to Claytor Lake in the late 1980s and soon established a thriving population. This study assessed 1) the degree to which gizzard shad were utilized by piscivores (pelagic - striped bass Morone saxatilis, hybrid striped bass M. chrysops x M. saxatilis, and …
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Temporal and spatial patterns of abundance of age 0 threadfin shad (Dorosoma petenense) in Overton Arm, Lake Mead
Temporal and spatial patterns of age 0 threadfin shad (Dorosoma petenense) abundance and growth, in the Overton Arm of Lake Mead, were examined to evaluate the effects of resource availability on the young fish. This was part of the Lake Mead Fertilization Project, designed to assess feasability of …
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Compatibility and complementarity of alewife (Alosa pseudoharengus) and gizzard shad (Dorosoma cepedianum) as forage fish in Smith Mountain Lake, Virginia
The attributes 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. …
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Spatial and Temporal Patterns of Anadromous Fish Passage at Boshers Dam Vertical Slot Fishway on the James River, Richmond, Virginia
… to evaluate environmental predictors of American shad (Alosa sapidissima) and sea lamprey (Petromyzon marinus) passage. The ecological effects of restoring connectivity to upstream habitat for gizzard shad (Dorosoma cepedianum) and blue catfish (Ictalurus furcatus) are also discussed. Regression …
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Analysis of the Trophic Support Capacity of Smith Mountain Lake, Virginia, for Piscivorous Fish
… of alewife (Alosa pseudoharengus) and gizzard shad (Dorosoma cepedianum) were determined using data on the biomass, growth, and mortality of each species. Mean hydroacoustic alewife biomass from 1993-1998 was 37 kg/ha and mean gizzard shad cove rotenone biomass from 1990-1997 was 112 kg/ha. …
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