Invasion
Invasion Description
1st Record: CA/Half Moon Bay (1995, Rawson et al. 1999, molecular survey)
Geographic Extent
CA/Half Moon Bay (1995, Rawson et al. 1999, molecular survey)
Vectors
| Level | Vector |
|---|---|
| Alternate | None |
| Alternate | Natural Dispersal |
Regional Impacts
| Ecological Impact | Hybridization | |
| ~12% of mussels examined at Half Moon Bay were hybrids (M. trossulus X M. galloprovincialis), compared to 24% purebred M. trossulus (Rawson et al. 1999). | ||
| Ecological Impact | Competition | |
| In 1994-95, 64% of mussels at Half Moon Bay were purebred M. galloprovincialis, while 24% were M. trossulus (Rawson et al. 1999). Changing environmental conditions (declining water temperatures) due to climate cycles, have reduced the frequency of M. galloprovincialis to ~35% (Hilbish et al. 2010). | ||