Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 88 for “"salmonids"”.
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The welfare and quality of farmed salmonids at harvest.
… stress response and carcass quality of farmed salmonids with a view to recommending best practice. Current salmonid harvesting techniques were determined via a questionnaire circulated to the industry. Commonly used killing/ stunning methods were tested for their effects on the welfare and …
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Salmonids in an Urban Stream: Movement, Habitat, and Potential Barriers
Studies on the movement of salmonids in the Pacific Northwest have been vital to their management and recovery. Salmonids can move great distances in search of food, habitat and potential mates, requiring them to travel through a range of different habitat types. Altered and degraded streams may …
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Sea lice infestation on wild salmonids in the southern part of the Icelandic Westfjords
Laxalús, Lepeophtheirus salmonis og grálús Caligus elongatus, eru náttúruleg sníkjudýr á laxfiskum í sjó. Lýsnar nærast á slímhúð, roði og blóði fiskanna og valda þannig streitu hjá þeim. Þær geta einar og sér valdið dauða fiska séu þær í miklum mæli en geta auk þess borið með sér aðra sýkla. …
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DIET ANALYSIS OF NATIVE AND NON-NATIVE JUVENILE SALMONIDS IN A LAKE SUPERIOR TRIBUTARY
<p>Introductions of Pacific salmonids to the Great Lakes and their tributaries have caused concerns about potential competition with native brook trout (<em>Salvelinus fontinalis</em>) of the region. My research evaluated the diet of five fish size categories (FSCs) of brook trout, non-native …
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Assessing the threat of non-native salmonids to Lahontan cutthroat trout recovery in a subalpine watershed
… fish recovery and introductions of non-native salmonids have been implicated in the decline of inland cutthroat trout subspecies. The United States Fish and Wildlife Service has been restocking Lahontan cutthroat trout Oncorhynchus clarkii henshawi in Fallen Leaf Lake, California annually since …
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Food–web implications of reintroducing anadromous salmonids in reservoirs on the North Fork Lewis River, Washington
… active transport (trap–and–haul) of anadromous salmonids around impassable high–head dams are being proposed with increasing frequency in the Pacific Northwest. Such reintroductions have already begun or are proposed above three dams on the North Fork Lewis River in Washington State. Spring …
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Factors influencing infectious agent communities and infection burden in free-ranging migratory adult salmonids across Canada
… the ongoing monitoring and investigation of wild salmonids.
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Reproduction in Male Salmonids with Special Reference to the Problems and Control of Maturation in Fish Culture
… accompanying the sexual maturation of male salmonids include a reduction in growth rate, the appearance of secondary sexual characteristics and changes in body composition. Information is presented on the development and extent of these changes among maturing rainbow trout and the endocrine …
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Effects of seasonal habitat limitations on the distribution and energetics of stocked salmonids in Lake Moomaw, Virginia
Lake Moomaw, a 1024 ha flood control reservoir in western Virginia, retains sufficient cold, oxygenated water (< 21°C, ≥ 5.0 mg/L) to allow trout survival throughout most of the summer. However, trout habitat declines to an annual minimum in September. vertical gillnets and ultrasonic telemetry …
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Sexual maturation in sea- and freshwater phases of Pacific salmonids and investigations of reproductive hormone involvement in osmoregulatory adaptation
… hormones may interfere with the ability of salmonids to osmoregulate in sea water.
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The Importance and Seasonal Variation of Terrestrial Invertebrates as Prey for Juvenile Salmonids on the Kol River Floodplain, Kamchatka, Russian Federation
… Terrestrial Invertebrates as Prey for Juvenile Salmonids on the Kol River Floodplain, Kamchatka, Russia Committee Chair: Dr. Jack Stanford Fluxes of energy and resources from one system to another across an interface can play a major role in the structure and function of the food web of the …
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The Importance and Seasonal Variation of Terrestrial Invertebrates as Prey for Juvenile Salmonids on the Kol River Floodplain, Kamchatka, Russian Federation
… Terrestrial Invertebrates as Prey for Juvenile Salmonids on the Kol River Floodplain, Kamchatka, Russia Committee Chair: Dr. Jack Stanford Fluxes of energy and resources from one system to another across an interface can play a major role in the structure and function of the food web of the …
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EVALUATION AND APPLICATION OF POPULATION SIZE ESTIMATORS TO ASSESS BROOK TROUT (SALVELINUS FONTINALIS) RESPONSE TO A NON-NATIVE SALMONID REMOVAL IN A SMALL MICHIGAN COLDWATER STREAM
<p>Non-native salmonids have been stocked into the Great Lakes since the 1870s and now naturalized populations use tributary environments to reproduce and for their juvenile life stage. Historically, brook trout were the only salmonid to inhabit the tributary environment and numerous studies …
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Predation, turbidity, and other factors influencing juvenile Salmonid survival in the lower Snake River
… was to quantify consumption rates of juvenile salmonids by three introduced species, smallmouth bass (Micropterus dolomieu), walleye (Sander vitreus) and channel catfish (Ictalurus punctatus). Consumption information is crucial because the construction of the Snake River hydrosystem has created …
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History, Ecology and Restoration Potential of Salmonid Fishes in the Umpqua River, Oregon
… Umpqua River, Oregon and current conditions for salmonids in the context of wild salmonid restoration. Results for the Umpqua were compared to other Pacific Rim Rivers. The history of the basin and impacts to the river including settlement, agriculture, logging, mining, dam building, hatchery …
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History, Ecology and Restoration Potential of Salmonid Fishes in the Umpqua River, Oregon
… Umpqua River, Oregon and current conditions for salmonids in the context of wild salmonid restoration. Results for the Umpqua were compared to other Pacific Rim Rivers. The history of the basin and impacts to the river including settlement, agriculture, logging, mining, dam building, hatchery …
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Lepeophtheirus salmonis, parasitizing three species of pacific salmon (Oncorhynchus spp.): host variations in load, morphology, fecundity, and genetics of the salmon louse
… parasitize different species of Pacific Ocean salmonids off the north Pacific coast of Washington State. Parasite load counts of L. salmonis were made and individuals were collected from salmonids in their natural environment. Louse morphology and fecundity were examined using microscopy. …
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