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Hells Canyon - Oxbow Subpopulation Status and Trends

Dillon, J. and S.A. Grunder. 2008. Management plan for the conservation of Snake River white sturgeon in Idaho. Idaho Department of Fish and Game, Boise, ID.

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The Hells Canyon Dam to Oxbow Dam reach is mostly reservoir habitat with a limited area of free-flowing habitat. Impoundment has resulted in limiting spawning area and is likely contributing to the export of white sturgeon larval through Hells Canyon Dam. Past surveys have resulted in the collection of few fish. The low number of juvenile and adult white sturgeon suggests that reproduction and recruitment have been limited since impoundment. Despite catch-and-release regulations, no significant increase of abundance has occurred over the last 30 years. At this time, managers do not believe the reservoir is capable of supporting a self-sustaining white sturgeon population.








Abundance


No data available at this time.

Density


No data available at this time.

Productivity


No data available at this time.

Hatchery Releases

Harvest


There is no harvest since catch-and-release regulations are in effect for this subpopulation.


See other data snapshots that help us gauge the abundance of fish and wildlife:

Subpopulations for Upper Snake Management Unit

Other Management Units - Subpopulations