Invasion
Invasion Description
1st record: WA/Puget Sound (in Ostrea lurida and Mytlius sp., probably trossulus, or hybrids with galloprovincialis; Protothaca staminea and Crepidula fornicata (Rankin 1943, cited by Carlton 1979; Odlaug 1946)
Geographic Extent
Bamfield, Vancouver Island/British Columbia/Barkley Sound (Goater and Weber 1996, in Mytilus trossulus); Ladysmith, Vancouver Island/British Columbia/Straits of Georgia (1958, Carl and Giguet 1972; Bernard 1969); British Columbia/Straits of Georgia (Quayle 1969; Carlton 1979); Denman Island/British Columbia/Straits of Georgia (1986, in Venerupis philippinarum; Bower et al. 1992); British Columbia/Oakover Arm, Straits of Georgia (1986, in Venerupis philippinarum; Bower et al. 1992); British Columbia/Nanoose Bay, Straits of Georgia (1986, in Venerupis philippinarum; Bower et al. 1992); British Columbia/Davis Lagoon, Straits of Georgia (1986, in Venerupis philippinarum); Bower et al. 1992); Lasqueti Island/British Columbia/Straits of Georgia (1986, in Venerupis philippinarum, Bower et al. 1992); Savari Island/British Columbia/Straits of Georgia (1986, in Venerupis philippinarum, Bower et al. 1992); WA/Puget Sound (in Ostrea conchaphila and Mytlius sp., probably trossulus, or hybrids with galloprovincialis, or hybrids with trossulus; Protothaca staminea and Crepidula fornicata (Rankin 1943, Oldlaug 1946; cited by Carlton 1979); WA/North Bay, Eld Inlet, Puget Sound (Odlaug 1946); WA/Mud Bay, Eld Inlet, Puget Sound (Odlaug 1946);
[Mytilicola-like copepods, probably M. orientalis: Crofton, Vancouver Island/British Columbia/Straits of Georgia (2002. in Venerupis philippinarum and Nuttallia obscurata, Marshall et al. 2003); Ladysmith, Vancouver Island/British Columbia/Straits of Georgia; in Venerupis philippinarum and Nuttallia obscurata, Marshall et al. 2003)
Vectors
| Level | Vector |
|---|---|
| Probable | Oyster Accidental |
| Alternate | Hull Fouling |
Regional Impacts
| Ecological Impact | Parasitism | |
| Reduced condition factor was reported in infected Pacific Oysters (Crassostrea gigas) in Hood Canal and Oyster Bay, Puget Sound (Katkansky et al. 1967). Highest infection rates in mussels (Mytilus trossulus) in Barkley Sound, British Columbia, were seen in sheltered, muddy areas near the low-tide mark (Goater and Weber 2009). | ||
| Economic Impact | Fisheries | |
| Impacts of Mytilicola orientalis on cultured Pacific Oysters (Crassostrea gigas were considered insignificant by Bernard (1969). Reduced condition factor was reported in infected Pacific Oysters (Crassostrea gigas) in Hood Canal and Oyster Bay, Puget Sound Chew et al. 1965; Katkansky et al. 1967). Reduced condition factor (smaller body mass, higher water content, less fat) reduces the quality of oysters. | ||