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Rocky Reach Subpopulation Status and Trends

Golder Associates Ltd. 2003a. Rocky Reach white sturgeon investigations, 2002 study results. Report to Public Utility District No. 1 of Chelan County.

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A 2002 survey of the Rocky Reach white sturgeon subpopulation led to a population estimate of 50-115 fish. The 2002 assessment indicated that recruitment was sporadic and appears to have been limited to a few specific years. Also potentially contributing to the population are white sturgeon immigrating from upstream reservoirs. Survey results indicated that the number of juvenile white sturgeon in Rocky Reach was greater than the number of juveniles collected in Wanapum and Priest Rapids reservoirs.










Abundance




* Abundance was not estimated for years without data.
* Abundance for year 2002 is between 50- 115 fish.


Productivity


No data available at this time.

Density


No data available at this time.

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 Mid-Columbia Management Unit

Other Management Units - Subpopulations