Invasion
Invasion Description
1st Record: OR-WA/Columbia River (Smith 1895)
Geographic Extent
OR-WA/Columbia River (1880, Smith 1895); OR-WA/Columbia River; Albany/OR/Willamette River (1888)r; Granite Dam/ID/ Snake River, Idaho, 600 km from the Ocean (Pearcy and Fisher 2011); OR/Coos Bay-Coos River (1888, Smith 1895); Humboldt County/CA/Klamath River (Breeding, Smith 1895). Breeding populations occur in the Coos River and Columbia River (Lampman 1946; Carlton 1989 unpublished); Fuller et al. 1999)
Vectors
| Level | Vector |
|---|---|
| Probable | Natural Dispersal |
Regional Impacts
| Economic Impact | Fisheries | |
| Commercial fisheries occurred in the Siuslaw, Umpqua, Smith, Coos, Coquille Rivers in Oregon, where shad spawned, averaging 192 metric tons per year, during 1962–72 (Mullen and Conover 1973, cited by Pearcy and Fisher 2011). | ||