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Ice Harbor Subpopulation Status and Trends

Information and data adapted from Parker, B., T, Rien, B. James, R. Beamesderfer. 2013. Review Draft Columbia Basin White Sturgeon Planning Framework. Portland, Or.

To view all subpopulations in the basin click here
For white sturgeon in Ice Harbor Reservoir, population monitoring has been limited with the most current data collected in 1996. Results from the 1996 survey indicated that the population density, growth, and fitness for the Ice Harbor population were lower than those for the subpopulations in the lower Columbia River reservoirs (i.e., Bonneville Reservoir, The Dalles, and John Day). Managers estimated that 4,830 white sturgeon (0.6 white sturgeon/acre) were present in Ice Harbor Reservoir in 1996. The existing population consisted of few young fish. Data from Age-0 index sampling (analysis of the population to evaluate the survival of fish through their first year) from 1996-2004, indicated that there was a lack a lack of Age-0 fish, supporting the hypothesis that the population was recruitment-limited.




Abundance



* Monitoring did not occur during years for which data do not exist.

Density


No data available at this time.

Productivity



* Index value 0 = No recruitment
* For a description of the methods used to estimate the index value that is associated with the number of fish that survive during their first year , please visit Monitoring Method website.


Hatchery Releases


No 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 Lower Snake Management Unit

Other Management Units - Subpopulations