Invasion

Invasion Description

1st Record: Bonneville Dam/OR/Columbia River (1945, Lampman 1946, 1 fish)

Geographic Extent

Bonneville Dam/OR/Columbia River (1945, Lampman 1946, 1 fish); Dayton/OR/Columbia River (1946, Lampman 1946, 1 fish); Portland/OR/Lower Willamette River (1990, Farr and Ward 1993); Milwaukee to mouth/OR/Willamette River (2001,