Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: > 300
Comments: Extremely common species. Harvested population in Lake Billy Chinook, Oregon, found to have mean density of 0.24 to 1.13 per square meter with total abundance 36 million (+- 8 million) individuals (Lewis and Horton, 1996). Introductions have been made throughout California, Nevada and Utah, as well as various parts of Europe (Rogers, 2005).