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Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Many populations of anadromous salmonids are currently in decline in the Pacific Northwest. One factor possibly limiting salmonid production in the Columbia River is an excessive use of energy by adults migrating upstream through the network of dams. A main objective of this project is to collect a temporal sequence of tissue samples (muscle, More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — The series of hydroelectric facilities (dams) in the Columbia River Basin are obstacles to Juvenile salmon as they make their migrations. This study is being conducted to evaluate how different patterns of spillway operation at John Day Dam affect juvenile salmon passage behavior and dispersal through the turbulent and complex tailrace More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — The goal of this sub-task is to provide fishery managers and decision makers with detailed information on the ecology of predatory fishes (northern pikeminnow and smallmouth bass) and juvenile salmonids in The Dalles Dam tailrace. Such information will help identify potential predation risks to juvenile salmonids in relation to project operations, More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Warm Springs National Fish Hatchery located on the Deschutes River, Oregon, is a unique program in the Columbia River basin. The objectives of this study are to determine the distribution of fall-released hatchery spring chinook salmon, evaluate migration behavior, assess microhabitat, and address potential interactions within the wild fish More...
Publisher: USGS | Science Center: Florida Integrated Science Center (FISC, Gainesville) | Format: URL
fisc.er.usgs.gov — This website provides access to the list of imperiled freshwater and diadromous fishes of North America as determined by the 2008 American Fisheries Society (AFS) Endangered Species Committee (ESC) on Fishes. At this website, one can view lists of imperiled fishes by freshwater ecoregion, by state or province boundary, and plot distributions of More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Fall chinook salmon (Oncorhynchus tshawytscha) in the Snake River are currently listed as threatened under the Endangered Species Act (ESA). Because fall chinook salmon migrate seaward during the summer when flows are low and water temperatures are high, their survival rate is lower. The goal of this study is to more clearly identify the More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — The objective of this project is to compile existing information into a format that will allow endangered species recovery planners to consider risks posed by various sources and types of water pollution. Identification of sources of pollution should include point- and nonpoint-sources. it is unlikely that all sources of pollution in all water More...
Publisher: USGS | Science Center: Fisheries: Aquatic and Endangered Resources | Format: URL
www.usgs.gov — Nearly 40 percent of fish species in North American streams, rivers and lakes are now in jeopardy, according to the most detailed evaluation of the conservation status of freshwater fishes in the last 20 years. The 700 fishes now listed represent a staggering 92 percent increase over the 364 listed as "imperiled" in the previous 1989 study More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Little is known about the importance of estuarine habitats for juvenile chinook salmon (Oncorhynchus tshawytscha), hence managers are uncertain of the appropriate levels of protection for such habitats. Research to determine the length of residence and growth of juvenile chinook salmon in the Skagit River estuary will indicate the importance of More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — The objective of this study is to determine habitat requirements that are necessary for successful Fall Chinook (Oncorhynchus keta) and Chum Salmon (Oncorhynchus tshawytscha) spawning and rearing in the lower Columbia River so that the hydrosystem can be managed to protect and enhance these spawning populations.
Publisher: USGS | Science Center: Leetown Science Center (LSC, Kearneysville) | Format: URL
www.lsc.usgs.gov — Molecular genetics has recently achieved an important place in contemporary conservation biology as it has proven to be a robust tool for identifying reproductive isolation among populations, permitting the delineation of management units (MUs) and allowing assessment of conservation priorities from an evolutionary perspective (i.e., More...
Publisher: USGS | Science Center: Alaska Science Center (ASC, Anchorage) | Format: URL
www.absc.usgs.gov — Genetics of Alaska Fishes Projects studies include comparing molecular genetics for rainbow trout throughout their range in Alaska and use microsatellite analyses to look at hatchery and wild populations of steelhead in the Snake River (Phylogeographic analysis of rainbow trout in Alaska). Research also looks at genetic population structure of More...
U.S. Department of the Interior |
U.S. Geological Survey