Stream Populations and Habitat of Great Basin Redband Trout PROJECT NUMBER: 99HQAG0047 PROJECT PERIOD: 3 March 1999 – 30 September 2000 PROJECT MANAGER: Dr
COMPLETION REPORT FISH RESEARCH PROJECT OREGON PROJECT TITLE: Assessment of Stream Populations and Habitat of Great Basin Redband Trout PROJECT NUMBER: 99HQAG0047 PROJECT PERIOD: 3 March 1999 – 30 September 2000 PROJECT MANAGER: Dr. Albert Sherk, U.S. Geological Survey Prepared by: Jeffery M. Dambacher Kim K. Jones Hiram W. Li Oregon Department of Fish and Wildlife 2501 S.W. First Avenue P.O. Box 59 Portland, OR 97207 This project was financed with Species at Risk Program funds administered by the U.S. Geological Survey Biological Resource Division, and with funds from Oregon Department of Environmental Quality, U.S. Fish and Wildlife Service, and U.S. Bureau of Land Management Lakeview District. Variable Probability Sampling in the Status Review of Great Basin Redband Trout Jeffrey M. Dambacher1, Kim K. Jones1, and Hiram W. Li2 1) Oregon Dept. Fish and Wildlife, 28655 Hwy. 34, Corvallis, Oregon 97333, USA. 2) Oregon Cooperative Fish and Wildlife Research Unit (USGS), Dept. Fisheries and Wildlife, Nash Hall, Oregon State University, Corvallis, Oregon 97331 USA. Abstract Using a variable probability sampling design, streams throughout the entire range of Great Basin redband trout (Oncorhynchus mykiss ssp.) were randomly sampled use the EMAP sampling protocol, such that 35 sample sites were apportioned to each of six subbasins (Silver Lake, Lake Abert, Goose Lake, Warner Valley, Catlow Valley, and Malheur Lakes). A total of 185 sites (out of a target of 210) were visited by three-person crews that conducted habitat surveys and population estimates in sample reaches whose length were nearly 20 times their channel width. A minimal sampling intensity was based on previously encountered levels of between site variance in abundance estimates for the species.
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