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White sturgeon spawning and rearing habitat in the lower Columbia River

January 1, 1994

Estimates of spawning habitat for white sturgeons Acipenser transmontanus in the tailraces of the four dams on the lower 470 km of the Columbia River were obtained by using the Physical Habitat Simulation System of the U.S. Fish and Wildlife Service's Instream Flow Incremental Methodology to identify areas with suitable water depths, water velocities, and substrates. Rearing habitat throughout the lower Columbia River was assessed by using a geographic information system to identify areas with suitable water depths and substrates. The lowering of spring and summer river discharges from hydropower system operation reduces the availability of spawning habitat for white sturgeons. The four dam tailraces in the study area differ in the amount and quality of spawning habitat available at various discharges; the differences are due to channel morphology. The three impoundments and the free-flowing Columbia River downstream from Bonneville Dam provide extensive areas that are physically suitable for rearing young-of-the-year and juvenile white sturgeons.

Citation Information

Publication Year 1994
Title White sturgeon spawning and rearing habitat in the lower Columbia River
DOI 10.1577/1548-8675(1994)014<0812:WSSARH>2.3.CO;2
Authors Michael J. Parsley, Lance G. Beckman
Publication Type Article
Publication Subtype Journal Article
Series Title North American Journal of Fisheries Management
Series Number
Index ID 70180416
Record Source USGS Publications Warehouse
USGS Organization Western Fisheries Research Center

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