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 49 for “"brown trout"”.
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Ecology of Lake Ontario Brown Trout
… movements, behavior, and habitat preferences of brown trout (Salmo trutta) in Lake Ontario. During fall 1980 and spring and fall 1981, the activities of 36 radiotagged brown trout were monitored near the southern shore of Lake Ontario between Port Bay and Point Breeze (Fig. 1). Underwater radio …
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Environmental factors related to the abundance and distribution of brook trout (Salvelinus fontinalis) and brown trout (Salmo trutta) and seasonal movements of brown trout in selected Virginia streams
The relationships between brook trout (Salvelinus fontinalis), brown trout (Salmo trutta), non-game fish populations and selected physical and chemical parameters were investigated in four streams draining the Blue Ridge Mountains in north-central Virginia during low flow conditions in August, 1981 …
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Hydrological aspects of brown trout management in the Selwyn River system, Canterbury, New Zealand
… Canterbury, New Zealand, on management of the brown trout (Salmo trutta) fishery. The project has four main aims: to describe the hydrological characteristics of the Selwyn River system; to outline the streamflow-related requirements of trout; to show how the hydrology of the Selwyn River …
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Mechanisms and consequences of hybridisation between Atlantic salmon (Salmo salar) and brown trout (Salmo trutta)
… system of Atlantic salmon, Salmo salar, and brown trout, S. trutta, to investigate mechanisms of hybridisation through sperm-egg interactions, much of which is poorly understood. Salmon and trout experience conspecific sperm precedence during in vitro sperm competition experiments, when sperm …
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Seasonal habitat use and survival of brown trout (Salmo trutta) in Oatka Creek, Monroe County, New York
… of 2013-2014 and 2014-2015 resulted in dramatic brown trout reductions throughout the spring-fed reaches of Oatka Creek in western New York. Management agencies are considering habitat manipulation to reduce the severity of overwinter merganser predation on the wild brown trout population in …
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The study of molecular variation in Atlantic salmon (Salmo salar L.) and brown trout (Salmo trutta L.)
… of an invasion than in previous studies with brown trout, and may have implications for the management of invasive species in general. Finally, the genetics of anadromous S. trutta from the Waterville catchment in south western Ireland were studied. Two significantly different population …
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Lessons to learn from all out invasion: life history of brown trout (Salmo trutta) in a Patagonian River
Brown trout (Salmo trutta) are widely introduced throughout Patagonia, though their distribution and impact in the region remain poorly documented. Life history flexibility, and particularly partial migration play a major role in the ability of this species to adapt to Patagonian rivers. …
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Lessons to learn from all out invasion: life history of brown trout (Salmo trutta) in a Patagonian River
Brown trout (Salmo trutta) are widely introduced throughout Patagonia, though their distribution and impact in the region remain poorly documented. Life history flexibility, and particularly partial migration play a major role in the ability of this species to adapt to Patagonian rivers. …
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The role of intrinsic and extrinsic factors in shaping alternative migratory tactics and metabolic phenotypes in brown trout
… diversity: alternative migratory tactics in brown trout Salmo trutta. Brown trout are iconic for the variety of migratory life histories they exhibit; yet fundamental knowledge gaps remain regarding how environmental, physiological, and genetic factors integrate to underpin life history …
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Feeding of Hatchery-reared Brown Trout (Salmo trutta L.) In Relation To The Diet In A South Dakota Stream
One thousand five hundred catchable brown trout (17-26 cm) were stocked into the South Fork of the Yellowbank River May 17, 1973. Samples were taken one month apart from May 22, 1973, through October 29, 1973. Fifteen-minute drift samples were collected every hour for 24 hours and trout were …
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Assessing effects of an overwinter dewatering on the egg-to-fry survival of brown trout in a Montana stream
… water affect autumn-spawning salmonids such as brown trout and bull trout; they occur at the critical egg-to-fry development phase, possibly reducing oxygen flow to the eggs and increasing the rate of sub-gravel freezing. This study was designed to examine the effects of a wintertime industrial …
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Assessing effects of an overwinter dewatering on the egg-to-fry survival of brown trout in a Montana stream
… water affect autumn-spawning salmonids such as brown trout and bull trout; they occur at the critical egg-to-fry development phase, possibly reducing oxygen flow to the eggs and increasing the rate of sub-gravel freezing. This study was designed to examine the effects of a wintertime industrial …
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Comparison between the subsurface environment of brown trout (Salmo trutta) redd and nonredd sites in two North Carolina streams
The gravel environment of 30 brown trout (Salmo trutta) redds and adjacent nonredd sites in two western North Carolina streams were studied during the incubation period in 1979-1980 and 1980-1981. Intragravel water temperature, dissolved oxygen concentration, and percent oxygen saturation were …
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Assessing the threat of non-native salmonids to Lahontan cutthroat trout recovery in a subalpine watershed
… 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 2002 to stem this decline. Brown trout Salmo trutta pose a …
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The population structure of wild Scottish brown trout (Samo trutta L.1758) of Loch Maree, Wester Ross: spatial genetic distribution after population decline
The wild trout of Loch Maree is an understudied population that recently experienced a population decline after once having a world status for its sea trout fisheries. Tissues and specimens sampled over the last decade exist in archives and have yet to undergo population genetic analysis. This …
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The response of eel, lamprey and brown trout to conditions associated with barriers to up- and downstream movement under experimental conditions in a flume
… migrating European eel, Anguilla anguilla, and brown trout, Salmo trutta. The use of a large open-channel flume allowed control of the motivational state of, and stimuli encountered by the fish. The fish responses to a variety of model weirs and screens placed in the flume were assessed, …
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