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Researchers at the Columbia River Research Laboratory are using biotelemetry methods to study the seasonal habitat use and movements of white sturgeons (Acipenser transmontanus) in the Columbia and Snake rivers in the Pacific Northwest. The study area is approximately 115 miles in length, and includes the confluence of the Snake and Columbia rivers. The area is bounded by McNary and Priest Rapids Dams on the Columbia River and Ice Harbor Dam on the Snake River, and includes about 43 miles of free-flowing river habitat known as the Hanford Reach in the Columbia River. White sturgeons for use in this study are captured with baited setlines. Ultrasonic transmitters are attached to each fish prior to releasing them. The study area is then searched weekly by boat during winter, summer, and fall. When a fish with a transmitter is found, its location is determined from a global positioning system (GPS) receiver, and measurements of the water velocity, depth, temperature, and turbidity are made at that location. These measurements will be used to characterize the habitat used by these fish. We're using a geographic information system (GIS) to display and analyze the information on habitat use and movements. Movements of individual fish can be displayed and measured. The GIS will also be used to locate and quantify the habitats used by white sturgeons. The descriptions of the habitat used by these fish can be used to locate, display, and quantify the habitat available in the study area. Project Contact Michael J. Parsley Email: mike_parsley@usgs.gov Publications
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