Species Regional Summary
Littorina saxatilis
San Francisco Bay ( P090 )

Invasion History Vectors Impacts References

Invasion

Invasion Description

1st Record: Emeryville/CA/San Francisco Bay (1993, Carlton and Cohen 1998);

Geographic Extent

Emeryville/CA/San Francisco Bay (1993, Carlton and Cohen 1998); Taney Marina Beach, Coast Guard Island/CA/Oakland Estuary (1996, Carlton and Cohen 1998); Port of Redwood City/CA/South San Francisco Bay (Miller et al. 2004); Brisbane/CA/Brisbane Lagoon, South San Francisco Bay (2004, Cohen et al. 2005); Coast Guard Island, Oakland/CA/Oakland Estuary (2004, Cohen et al. 2005); Coyote Point Marina/CA/South San Francisco Bay 2004, Cohen et al. 2005);

Vectors

Level Vector
Alternate Discarded Bait
Alternate Fisheries Accidental (not Oyster)

Regional Impacts

Ecological ImpactCompetition
The native periwinkles L. scutulata, L. plena and L. keenae were absent in the vicinity of introduced L. saxatilis populations in San Francisco Bay (Carlton and Cohen 1993). However, the mechanisms for this apparent exclusion have not been studied, to our knowledge.
 

References

Full Reference List for Littorina saxatilis

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