Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — This U.S./Russian collaboration will investigate genetics and life histories of Kamchatka Peninsula rainbow trout and steelhead (O. mykiss), and Dolly Varden, white-spotted, and arctic char (S. malma, S. leucomaensis, and S. alpinus, respectively). Both anadromous and resident forms of these generally occur in Kamchatka rivers that are free from More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — This study evaluates costs and benefits for alternative sources of broodstock for supplementation, and tests for domestication in hatchery programs. The study tests for genetic differences in the migration, growth, and survival of hatchery and wild steelhead (Oncorhynchus mykiss) and of hatchery and wild spring chinook salmon (O. tshawytscha) in More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Research biologists at the Columbia River Research Laboratory are using global positioning systems (GPS) in a study of the distribution of juvenile salmon in relation to dissolved gas supersaturation in the Columbia and Snake rivers. The study is being conducted between Ice Harbor Dam on the Snake River and on the Columbia River, a distance of 42 More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — The goal of this work is to provide information to aid state, federal, and tribal managers in efforts to protect and restore the white sturgeon (Acipenser transmontanus) in the Columbia River Basin Construction and operation of dams on the Columbia and Snake rivers for hydroelectricity, navigation, and irrigation have adversely affected white More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Pacific lamprey (Lampetra tridentata) populations are in decline or have been extirpated from much of their historical range in the Columbia River Basin. Evidence collected for sea lampreys suggests they may not home to natal streams, but instead may use their olfactory ability to detect the presence of larval and adult lampreys as discrete More...
Publisher: USGS | Science Center: Upper Midwest Environmental Sciences Center (UMESC, LaCrosse) | Format: URL
www.umesc.usgs.gov — In the Upper Mississippi River, more than 80 species of fish use vegetated habitats during some portion of their life cycle. Fish depend on aquatic vegetation for abundant, high-quality food resources (plant-associated invertebrates) and refuge from predators. Vegetation abundance in the Upper Mississippi River substantially declined in the late More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Since 1994, scientists from the Anadromous Fish Ecology Team have been assisting the U.S. Army Corps of Engineers (USACE) in evaluating the migration behavior and passage of juvenile salmon and steelhead through Lower Granite Reservoir and Dam on the Snake River, WA. The goal of this study is to identify the behavior of individual juvenile salmon More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — The Arctic charr (Salvelinus alpinus) in the northern most latitudes migrate to the ocean in the spring to feed and grow. This results in accumulation of polychlorinated biphenyls (PCB) in their visceral fat. During the winter, the charr reside in freshwater lakes and do not feed. They do mobilize lipids from adipose tissue for energy, which More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — As anadromous juvenile salmonids migrate from freshwater rearing habitats to the ocean, they are vulnerable to a host of factors that affect their survival. Direct effects associated with dam passage (e.g., instantaneous mortality, injury, loss of equilibrium, etc.) and indirect effects (e.g., predation, disease, and physiological stress) More...
Publisher: USGS | Science Center: Columbia Environmental Research Center (CERC, Columbia) | Format: URL
www.cerc.usgs.gov — The BFRS works cooperatively with team members from CERC and with faculty and graduate students of Department of Wildlife and Fisheries Sciences at Texas A&M University in research areas represented by the branch structure of the CERC including toxicology, ecology, biochemistry and physiology, environmental chemistry, ecogeography, and information More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — The National Marine Fisheries Services Biological Opinion on the Columbia River salmon listed under the Endangered Species Act sets guidelines for salmon recovery, many of which address salmon passage issues at hydroelectric dams operated by the U.S. Army Corps of Engineers (COE), because fish passing via turbines do not survive as well as those More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — One possible cause of the relatively low spillway survival at The Dalles Dam is the pattern in which the water is spilled over the dam. To avoid passing fish through the spillway and into shallow areas downstream known to harbor piscivores, a juvenile spill pattern is used. This pattern, designed to pass fish through the northernmost spill bays More...