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2005 | Publisher: USGS | Science Center: Fort Collins Science Center (FORT, Ft. Collins) | Format: URL
www.fort.usgs.gov — Historically, the Colorado River was one of the most formidable rivers in the world. Each spring, melting snow from the mountains scoured the desert landscape moving millions of tons of sediment to the sea. The Grand Canyon lays testament to its erosive nature. Summer heat would bring seasonal droughts, reducing the river to a trickle impacting More...
Publisher: USGS | Science Center: Leetown Science Center (LSC, Kearneysville) | Format: URL
www.lsc.usgs.gov — This is a research project whose primary objective is to assess the health of selected fish species (brown bullhead and largemouth bass) and compare these findings with historic information on fish health in the individual rivers and with concurrent samples collected at reference sites. A secondary objective is to compare and correlate the fish More...
2008 | Publisher: Other (RSC Publishing, Journal of Environmental Monitoring) | Format: URL
www.rsc.org — Environmental contaminant and biomarker monitoring data from major U.S. river basins were summarized for black bass (Micropterus spp.) and common carp (Cyprinus carpio) sampled over a nine year period. Cumulative frequency distributions revealed taxon differences for many organochlorine residue concentrations, elemental contaminant concentrations, More...
2008 | Publisher: USGS | Format: URL
pubs.usgs.gov — This study determined that concentrations of persistent hydrophobic contaminants, such as polycyclic aromatic hydrocarbons (< picograms per liter), legacy pesticides (<10 picograms per liter), and polychlorinated biphenyls (<280 picograms per liter) were low and indicative of a largely agricultural area. Atrazine and simazine were the most More...
May 4 2007 | Publisher: Other (Springer New York) | Format: URL
www.springerlink.com — This project is an evaluation of three potentially nonlethal alternatives to fillet sampling for the determination of mercury (Hg) concentrations in smallmouth bass (Micropterus dolomieu) to monitor mercury concentrations in smallmouth bass (micropterus dolomieu) from six sites in southern Missouri were captured by electrofishing. Blood samples More...
October 2006 | Publisher: USGS | Science Center: Florida Integrated Science Center (FISC, Gainesville) | Format: URL
sofia.usgs.gov — This research report is about the variable growth and longevity of yellow bullhead (Ameiurus natalis) in South Florida. The goal of this study was to model the age and growth of yellow bullheads from southern Florida and to compare the results qualitatively with growth estimates for yellow bullhead populations from other parts of its geographical More...
September 2006 | Publisher: USGS | Format: URL
pubs.usgs.gov — This report documents the spatial trends in the concentrations of accumulative contaminants and assesses the contaminant effects on the fish from the Colorado River Basin.
December 2003 | Publisher: USGS | Science Center: Upper Midwest Environmental Sciences Center (UMESC, LaCrosse) | Format: URL
www.umesc.usgs.gov — This project status report references a web resource database developed by the Long Term Resource Monitoring Program (LTRMP) to provide ready access to data for managers within the Upper Mississippi River System (UMRS) Basin. The Upper Midwest Environmental Sciences Center provides access to LTRMP data through a series of Web pages that permit More...
2002 | Publisher: USGS | Science Center: Great Lakes Science Center (GLSC, Ann Arbor) | Format: .PDF
www.glsc.usgs.gov — In 2002, scientists from the Great Lakes Science Center assessed the health of the populations of preyfish for the biennial State of the Lakes Ecosystem Conference (SOLEC) to provide information to policy makers on the status of the lakes and future needs. Preyfish population is one of the 80 indicators used by SOLEC to determine the health of the More...
2002 | Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — The value of this long-term monitoring program will provide data crucial for understanding demographic and reproductive characteristics of these endangered sucker populations. This research will have wide applicability to federal, state, and tribal agencies in the basin for management and recovery efforts.
September 10 2000 | Publisher: Other (Grand Canyon Monitoring and Research Center) | Format: .PDF
www.gcmrc.gov — Lees Ferry was stocked with Rainbow Trout in the early 1960`s. Since then, it has been a nationally acclaimed and world renowned blue ribbon fishery. With its value as a recreational play land for fishermen and safe haven for wildlife, the function and impact of the Glen Canyon Dam has become increasingly important for study and monitoring.
Publisher: USGS | Science Center: Forest and Rangeland Ecosystem Science Center (FRESC, Corvallis) | Format: URL
fresc.usgs.gov — This dataset is an ArcInfo point coverage depicting obstacles to anadromous fish migration in western Oregon. Data were compiled by fourth-field hydrologic unit code (HUC) from the Oregon Department of Fish and Wildlife StreamNet Database and from reports by fisheries biologists in various management agencies. Both natural and constructed (e.g., More...
U.S. Department of the Interior |
U.S. Geological Survey