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 14 of 14 for “"migratory fish"”.
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GENETIC POPULATION STRUCTURE AND CONSERVATION OF BULL TROUT IN THE EAST FORK BITTERROOT RIVER DRAINAGE, MONTANA
… are currently listed as threatened by the U.S. Fish and Wildlife Service. Understanding and conserving the genetic and life history diversity of bull trout populations across their range is critical as conservation, management, and recovery plans are developed. Numerous studies in different …
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GENETIC POPULATION STRUCTURE AND CONSERVATION OF BULL TROUT IN THE EAST FORK BITTERROOT RIVER DRAINAGE, MONTANA
… are currently listed as threatened by the U.S. Fish and Wildlife Service. Understanding and conserving the genetic and life history diversity of bull trout populations across their range is critical as conservation, management, and recovery plans are developed. Numerous studies in different …
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PREDICTING CONTAMINANT TRANSFER FOLLOWING RE-ESTABLISHED CONNECTIVITY IN THE BOARDMAN RIVER
… (DDT), and organochloride compounds. Migratory fish accumulate and magnify contaminants within their tissues and transport them across ecosystem boundaries. Re-established connectivity in the form of dam removal has the potential to allow contaminant laden migrants access to ecosystems …
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Hydrological and ecological observations along the eastern Beaufort Sea coast of Alaska
… bays and lagoons that provide habitat for migratory fish and waterfowl that are essential to the subsistence and culture of Iñupiat communities of northern Alaska. In the eastern Beaufort, in particular, residents of Kaktovik rely heavily on the high benthic productivity of these lagoon …
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Modelling migration and aggregation: Applications in fisheries, environmental change, and evolution
Commercially important fish stocks worldwide are in danger of collapse due to fisheries exploitation compounded by environmental change. Many species exhibit seasonal migratory homing behaviour to and from spawning grounds. In this thesis, models are developed to explore the consequences of …
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Spatial modelling of blue whiting population dynamics in the north-east Atlantic
… has become necessary for developing better fishery management strategies. Observations suggest that changes in recruitment and/or population distributions might be explained by environmental factors and spatial processes. However, it is unclear how these drivers directly affect the …
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Effects of Barriers on Migratory Bull Trout and Application of a Conceptual Framework to Evaluate Tradeoffs Associated with Dam Removal in the Clearwater River Drainage, Montana
… known for their negative ecological impacts on fish populations. Despite these negative impacts, dams are ubiquitous, many dams are aging, and decisions to remove dams are becoming progressively more common. Barriers can be detrimental by inhibiting movement among key habitats, but can also be …
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Effects of Barriers on Migratory Bull Trout and Application of a Conceptual Framework to Evaluate Tradeoffs Associated with Dam Removal in the Clearwater River Drainage, Montana
… known for their negative ecological impacts on fish populations. Despite these negative impacts, dams are ubiquitous, many dams are aging, and decisions to remove dams are becoming progressively more common. Barriers can be detrimental by inhibiting movement among key habitats, but can also be …
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Measuring the production of migratory Westslope Cutthroat Trout in tributaries to Priest River, Idaho
<p>Iteroparous salmonids that exhibit a migratory life history are essential to functioning metapopulations. They are demographically important as migratory females produce more eggs than non-migratory individuals. Additionally, they provide genetic support through gene flow, resulting in more …
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Fish counters: what are they counting and what does it tell us?
The monitoring of the migratory fish, Atlantic salmon (Salmo salar), is of global importance. Within Scotland, many rivers use a resistivity counter to detect the presence of Atlantic Salmon. The data produced from these counters is currently poorly described, with no uniform method of data quality …
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MANAGEMENT AND LIFE HISTORY CONSEQUENCES OF HYBRIDIZATION BETWEEN WESTSLOPE CUTTHROAT TROUT (ONCORHYNCHUS CLARKII LEWISI) AND RAINBOW TROUT (ONCORHYNCHUS MYKISS)
<p>The role of introductions of nonnative fishes in the decline of native fishes cannot be overstated. Westslope cutthroat trout (<italic>Oncorhynchus clarkii lewisi</italic>, WCT) are a salmonid native to the northern Rocky Mountains. These trout hybridize with rainbow trout (<italic>O. mykiss, …
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MANAGEMENT AND LIFE HISTORY CONSEQUENCES OF HYBRIDIZATION BETWEEN WESTSLOPE CUTTHROAT TROUT (ONCORHYNCHUS CLARKII LEWISI) AND RAINBOW TROUT (ONCORHYNCHUS MYKISS)
<p>The role of introductions of nonnative fishes in the decline of native fishes cannot be overstated. Westslope cutthroat trout (<italic>Oncorhynchus clarkii lewisi</italic>, WCT) are a salmonid native to the northern Rocky Mountains. These trout hybridize with rainbow trout (<italic>O. mykiss, …
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Sampling methodology tradeoffs: evaluating monitoring strategies for the endangered humpback chub (Gila cypha) in the Little Colorado River, Arizona
… may be challenging especially when assessing a migratory species monitored on its spawning ground. Due to concerns regarding sampling availability, in such cases, it may be necessary to evaluate temporary emigration from the study site to avoid generating biased estimates of survival, detection …
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Modelling and investigation of the role of anthropogenic noise on the collective behaviour of marine animals
From flocks of birds to schools of fish, animals moving in a collective group has fascinated the world for centuries. The displays of interesting and dynamic behaviour has been captured numerically and analytically, providing key insights into the mechanisms behind different behaviours. Many marine …