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,
Vectors
| Level | Vector |
|---|
Regional Impacts
| Economic Impact | Fisheries | |
| Channel Catfish is an important sport fish in the Columbia River (Oregon Department of Fisheries and Wildlife 2014; Washington Department of Fisheries and Wildlife 2014) http://wdfw.wa.gov/fishing/washington/Species/1171/, http://www.dfw.state.or.us/resources/fishing/warm_water_fishing/channel_catfish.asp | ||
| Ecological Impact | Predation | |
| 'In Columbia River reservoirs, large channel catfish (> 67 centimeters) consume thousands of juvenile salmon, which comprise 50% to 100% of their diets (Vigg et al. 1991). A single catfish eats an average of one juvenile salmon every three' (Sanderson et al. 2009). | ||