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Problem - The Ithaca Subdistrict Office of the U.S. Geological Survey (USGS) is providing technical assistance to the USGS, Biological Resources Division (BRD), at the Tunison Laboratory of Aquatic Science (TLAS) in an investigation of the availability of fresh ground water. An expansion in the water supply at the laboratory is needed for a proposed spawning facility for salmon strains that are viable for natural fisheries in the Great Lakes region. The hydrogeology of the area is a complex of moraine and outwash deposits west of Cortland, N.Y. Data from existing wells at the laboratory indicate that well screens may readily clog from precipitated minerals. A review of the hydrogeology of the area, including...
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Background The New York State Department of Environmental Conservation (NYSDEC) and Adirondack Lakes Survey Corporation (ALSC) repeatedly surveyed fish assemblages and characterized water chemistry from 44 to 52 lakes during the periods 1984-1987 and 1994-2005, and 2008-2012 to document the regional effects of acidic deposition and potential recovery associated with the 1990 Clean Air Act Amendment (CAAA) under the Adirondack Long-Term Monitoring (ATLM) Project. An initial analysis of changes in fish assemblages between the periods 1984-1987 and 1994-2005 noted modest and mixed recoveries, identified five fish-community response/recovery classes, and helped to devise a fish-community index based on species acid...
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American Eel (Anguilla Rostrata) Background The U.S. Geological Survey (USGS) has worked in cooperation with The Nature Conservancy (TNC) over the past 11 years to study the effects of channel geomorphology and impoundments on the distribution of common and rare mussels in the Neversink River and to characterize fish assemblages in tributaries to the Upper Delaware River in New York, Pennsylvania, and New Jersey. The focus of this research and monitoring program has recently shifted toward studies of the rapidly declining American eel (Anguilla rostrata) populations in rivers of the tri-state region. There are many factors that could potentially cause the observed declines in local and continental populations of...
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DOI, USDA, state fisheries managers, and NGOs are increasingly consumed with the recovery and restoration of native trout and salmon throughout their range. Almost all of the native inland cutthroat species, grayling and bull trout have been proposed for listing under the Endangered Species Act, a number are currently listed as �Threatened�, while others are under review. Trout and salmon historically inhabited a variety of freshwater habitats (streams, rivers, lakes, ponds, reservoirs), but have declined due to habitat degradation, fragmentation, and introductions of nonnative species. As such, the remaining intact populations of native trout, char, and grayling species in the western United States are largely...
    map background search result map search result map The Potential Influence of Changing Climate on the Persistence of Native Salmonids "at Risk" Response of Fish Assemblages to Changing Acid-base Chemistry in Adirondack Long Term Monitoring Lakes, 1984-2012 Assessing American Eel Populations in Tributaries to the Upper Delaware River Aquifer Appraisal at the Tunison Laboratory of Aquatic Science, Cortland, New York Aquifer Appraisal at the Tunison Laboratory of Aquatic Science, Cortland, New York Assessing American Eel Populations in Tributaries to the Upper Delaware River Response of Fish Assemblages to Changing Acid-base Chemistry in Adirondack Long Term Monitoring Lakes, 1984-2012 The Potential Influence of Changing Climate on the Persistence of Native Salmonids "at Risk"