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.
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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.