Upstream Changes in Fish Populations following Impoundment of Sagehen Creek, California

Don C. Erman

Transactions of the American Fisheries Society · 1973 · 48 citations · 0 references

Concepts

Abstract

Fish populations were compared before (1952–1961) and after (1970–1972) construction of Stampede Reservoir in a mile of Sagehen Creek above the reservoir. Relative abundance and species composition were quite different after reservoir construction. Suckers (Catostomus platyrhynchus and C. tahoensis) are now numerically dominant (79% of all fish); whereas, formerly they made up 18% (by numbers) of the fish composition. Rainbow trout have increased, but brown trout and whitefish have decreased; and brook trout have not been collected since impoundment. Reservoir construction is the only major change in the Sagehen Creek watershed.