Invasion
Invasion Description
1st Record: Portland/OR/Willamette River (1905, Lampman 1946)
Geographic Extent
Columbia river; Sauvies Island/OR/Columbia River; Portland/OR/Willamette River (River km 5. Hughes and Gammon 1987); OR/Willamette River (River km 1.8-14, Farr and Ward 1993)
Vectors
Level | Vector |
---|---|
Probable | Fisheries Intentional |