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 23 for “"Steelhead"”.
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Salmon & Steelhead Hatcheries: Conservation or Condemnation?
Wild salmon and steelhead are as fundamental to the Pacific Northwest as evergreen trees and rain. For thousands of years ecosystems and economies have relied on the bountiful marine nutrients annually running inland from the Pacific Ocean in the form of large, silver fish. Even today, the chance …
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Salmon & Steelhead Hatcheries: Conservation or Condemnation?
Wild salmon and steelhead are as fundamental to the Pacific Northwest as evergreen trees and rain. For thousands of years ecosystems and economies have relied on the bountiful marine nutrients annually running inland from the Pacific Ocean in the form of large, silver fish. Even today, the chance …
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Dispersal of Fry and Distribution of Redds Interact to Shape Density Dependence in Winter Steelhead of the Skagit River
… the fine-scale distribution of age-0+ (fry) steelhead (Oncorhynchus mykiss) near redds across multiple sites in the Skagit River, WA. The estimated mean downstream displacement of fry was 145m with 95% of fry remained within 312m of their natal redd. Evidence of density-dependent dispersal …
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Sexual maturation in sea- and freshwater phases of Pacific salmonids and investigations of reproductive hormone involvement in osmoregulatory adaptation
… salmon, chinook, Oncorhynchus tshawytscha, and steelhead, O. mykiss, were documented for stocks spawning in two similar river systems on the west coast of Vancouver Island, British Columbia, Canada. Chinook were blood-sampled and sacrificed at intervals during migration from the ocean into …
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Passage Route Survival and Behavior of Juvenile Salmon at Priest Rapids Dam, Columbia River, WA
… the bypass to collect and safely pass juvenile steelhead and Chinook salmon. The bypass collected 47% of the monitored steelhead and 38% of the monitored yearling Chinook salmon. Analysis of route choice identified forebay temperature, powerhouse discharge, spillway discharge and forebay …
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Do freshwater growth opportunities and migration barriers limit recovery of imperiled anadromous Oncorhynchus mykiss populations?
Steelhead (Oncorhynchus mykiss) populations in the Puget Sound Distinct Population Segment are far below their historic abundance and are currently listed as Threatened under the Endangered Species Act. Despite the declines in steelhead abundance, resident O. mykiss populations appear to be …
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Modeling Artificial Groundwater Recharge in the Santa Rosa Creek Watershed
… domestic uses, and the creek is critical habitat steelhead trout. During dry years, there is less water for all uses. When low groundwater levels occur, water can be drawn out of the creek and into the soil, drying out steelhead habitat. Seven agricultural operators within the Santa Rosa Creek …
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Studies of the host-microbe relationship in aquaculture-raised animals
… parameters on the microbiomes of rainbow trout, steelhead trout, and Nile tilapia, including dietary supplementation, administration of probiotics and animal age. Though there is a significant correlation between the diet fed to fish and their microbiome communities, small dietary changes such as …
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DIET ANALYSIS OF NATIVE AND NON-NATIVE JUVENILE SALMONIDS IN A LAKE SUPERIOR TRIBUTARY
… categories (FSCs) of brook trout, non-native steelhead trout (<em>Oncorhynchus mykiss</em>), and coho salmon (<em>Oncorhynchus kisutch</em>) in a tributary of Lake Superior by using diet overlap and selectivity indices as measures of potential competitive interactions. Stomach contents and …
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Spatial, Seasonal, and Size-Dependent Variation in the Diet of Sacramento Pikeminnow in the Main Stem of Chorro Creek, Central Coast California
… (Oncorhynchus mykiss) and their anadromous form (steelhead). Prey was identified in 88% of the samples collected in the early season and 84% of the samples collected in the late season. Fish and/or scales were identified in 12% of the samples collected. Sacramento pikeminnow consumed a wide …
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The Genetic Architecture of Juvenile Migration in Rainbow Trout (Oncorhynchus mykiss)
… both within and among species. Rainbow and steelhead trout (Oncorhynchus mykiss), members of the salmonid family of fishes, capture this variation throughout their native range. Some populations and ecotypes will remain resident in freshwater habitats throughout their life history; while …
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Impacts to Anadromous Fish through Groundwater Extraction
… Valley sub-basin where impacts to winter-run steelhead (Oncorhynchus mykiss) are limited by a confining layer in the upper portion of the alluvial aquifer. The conclusion provides an analytical framework for exploring this topic in other basins, considers the new Sustainable Groundwater …
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Lower Scotts Creek Floodplain and Habitat Enhancement Project
… Coho Salmon (endangered) in addition to CCC steelhead (threatened). Fisheries biologists believe overwinter mortality due to lack of refuge habitat is the primary factor limiting salmonid production. Instream rearing habitat may also be limiting, especially during drought years. The legacy …
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History, Ecology and Restoration Potential of Salmonid Fishes in the Umpqua River, Oregon
… of increasing the limit of wild salmon and steelhead harvest to various stocks is also necessary.
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History, Ecology and Restoration Potential of Salmonid Fishes in the Umpqua River, Oregon
… of increasing the limit of wild salmon and steelhead harvest to various stocks is also necessary.
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Field Investigation of Stream-Aquifer Interactions: A Case Study in Coastal California
… due to the presence of federally protected steelhead trout (Oncorhynchus mykiss) and coho salmon (Oncorhynchus kisutch). An understanding of the interaction between the stream and pumped aquifer will allow for assessment of the impacts of groundwater extraction on stream flows and is …
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Chapter 1, a dichotomous key for the identification of nine salmonids of the Inland Northwest using six diagnostic skull bones; and associated equations to estimate total length and weight form bones ingested by piscivores or found in archeological sites; Chapter 2, Utilization of acoustic biotelemetry to define the movements of Lake Roosevelt Redband trout, oncorhynchus mykiss gairdneri
… annual runs of 1 to 3 million salmon and steelhead (8-12% of Columbia River run; UCUT 1985) and provided habitat for lamprey, sturgeon and other fish species. Today, resident redband rainbow trout and kokanee salmon, potential remnant populations of anadromous runs, remain in Lake …
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Isolation, Structures, Synthesis and Biological Activities of Non-Mammalian Vertebrate Endothelins
… homogeneity from extracts of the kidney of the steelhead trout, Oncorhynchus mykiss, the stomach and liver of the European green frog, Rnnn ridibunda, and the kidney and lung of the American alligator, Alligator mississipiensis, by gel permeation chromatography and reverse-phase HPLC. Amino acid …
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