Invasion
Invasion Description
1st Record: WA-British Columbia/Boundary Bay (Demond 1952, cited by Carlton 1979
Geographic Extent
WA-British Columbia/Boundary Bay (Demond 1952, cited by Carlton 1979; Hanna 1966; 1977, Carlton 1979); Whatcom County/WA/Birch Bay (failed, 1950s, Carlton 1979)
Vectors
| Level | Vector |
|---|---|
| Probable | Oyster Accidental |
Regional Impacts
| Ecological Impact | Predation | |
| The introduction of T. obsoleta resulted in the transport of 2 digenetic trematode species to Boundary Bay: Himasthla quissetensis; Austrobilharzia variglandis. These species have birds (shorebirds, gulls, cormorants, ducks) as final hosts (Blakeslee et al. 2012). The effect of these parasites on their final hosts is unknown. | ||