Brownlee - Swan Falls 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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Few white sturgeon inhabit the Brownlee Dam to Swan Falls Dam reach, despite being
the longest riverine section within the series of upper Snake River reservoirs.
In 1981, only one sturgeon was captured during a survey. A 1997 assessment of white
sturgeon (>35 inches) resulted in an abundance estimate of 155 fish (7 fish/km)
from Swan Falls Dam to Walters Ferry. Multiple studies have led managers to characterize
the white sturgeon population as being one that has little or no recruitment. Due
to suitable habitat being limited for juvenile and adult white sturgeon combined
with water quality issues, managers believe it is unlikely the population will recover
to self-sustaining levels in the near future.
Abundance
* Monitoring did not occur during years
for which data do not exist.
Density
No data available at this time.
Productivity
No data available at this time.
Hatchery Releases
No releases
Harvest
There is no harvest since catch-and-release regulations are in effect for this subpopulation.