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2008 | Publisher: USGS | Science Center: Fort Collins Science Center (FORT, Ft. Collins) | Format: URL
www.fort.usgs.gov — San Acacia Dam is located in a reach of the Rio Grande that has been designated as critical habitat for two endangered species, the Rio Grande silvery minnow (Hybognathus amarus) and the southwestern willow flycatcher (Empidonax traillii extimus). Presently, Rio Grande upstream from the dam is used to convey irrigation water to the Socorro main 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...
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...
June 2001 | Publisher: USGS | Science Center: Upper Midwest Environmental Sciences Center (UMESC, LaCrosse) | Format: URL
www.umesc.usgs.gov — This report describes an electronic database containing 474 annotated citations that are relevant to fish passage through dams in large temperate floodplain rivers. The goal of this project was to survey the literature to help define the potential ecological consequences of restricted fish passage through dams in the Upper Mississippi River System More...
2001 | Publisher: USGS | Science Center: Upper Midwest Environmental Sciences Center (UMESC, LaCrosse) | Format: URL
www.umesc.usgs.gov — Research at the Upper Midwest Environmental Center, which gathered detailed observations on tree swallow nesting success and contaminant concentrations in 1998-2000, to guide EPA and the U.S. Fish and Wildlife Service in effectively managing the risk of chemical contaminants to wildlife and the environment.
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: Upper Midwest Environmental Sciences Center (UMESC, LaCrosse) | Format: URL
www.umesc.usgs.gov — Paddlefish (Polyodon spathula) have been lost from four states and Canada, and 11 of 22 states within the remaining species range now list the paddlefish as endangered, threatened, or a species of special concern. Restoration of paddlefish populations is a shared goal of many state and federal agencies. UMESC scientists, in collaboration with the More...
Publisher: USGS | Science Center: Leetown Science Center (LSC, Kearneysville) | Format: URL
www.lsc.usgs.gov — Freshwater bivalves, which are among the most threatened animals in North America, present significant challenges to conservation biologists that attempt to maintain ecological and evolutionary processes within and among populations. Effective management of this rare fauna is often complicated because inadequate information exists for More...
Publisher: USGS | Science Center: Upper Midwest Environmental Sciences Center (UMESC, LaCrosse) | Format: URL
www.umesc.usgs.gov — Zebra mussels have caused drastic declines in native clam and mussel populations in some locations. Zebra mussels compete with other invertebrates and young fish for plankton, the primary food source for these groups. UMESC scientists are investigating the effects zebra mussels are having on the riverine ecosystem. This study examines the effects More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Threatened and endangered salmonids in the Pacific Northwest often use backwaters and wetlands as they migrate toward the ocean, however our understanding of the role of wetlands to juvenile salmonids is limited. The major Objective of this study was to determine whether juvenile steelhead were being tapped on the wetland during spring, and More...
Publisher: USGS | Science Center: Upper Midwest Environmental Sciences Center (UMESC, LaCrosse) | Format: URL
www.umesc.usgs.gov — Eurasian Ruffe pose a threat to native fish because they(1) mature quickly, (2) have a high reproductive capacity, and (3) easily adapt to new environments. Ruffe were first detected in western Lake Superior in 1986. UMESC scientists are conducting research on various types of piscicides (chemicals that kill fish). They are attempting to develop More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Mercury contamination from historic gold mining operations is widespread in many rivers, lakes, and reservoirs on the western slopes of the Sierra Nevada. A multidisciplinary investigation by USGS is attempting to better understand mercury dynamics and to identify hot spots within Camp Far West Reservoir in order to determine if remediation More...
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U.S. Geological Survey