Invasion
Invasion Description
1st Record: CA/Los Angeles-Long Beach Harbors (1998, Ranasinghe et al. 2005, established)
Geographic Extent
Santa Barbara/CA/Santa Barbara Harbor (2011, California Department of Fish and Wildlife 2014, 1 specimen); Oxnard/CA/Port Hueneme (2000, Fairey et al. 2002); Los Angeles County/CA/Mugu Lagoon (mid 2000s to mid 2010s, Novoa et al. 2016); CA/Los Angeles-Long Beach Harbors (1998, Ranasinghe et al. 2005, established); Long Beach/CA/Colorado Lagoon (Burnaford et al. 2011, now dominant, replacing Mercenaria mercenaria); CA/Newport Bay (stocked 1953, failed, 'without result', Carlton 1979; 1998, Ranasinghe et al. 2005, established); Hill's Boat Service, Newpor BeachCA/Newport Bay, 1 of 10 sites smapled); Oceanside/CA/Oceanside/ Harbor (2011, California Department of Fish and Wildlife 2014, 1 specimen); San Diego/CA/Mission Bay (2012, Tuskes 2012, cited by Talley et al. 2015, higherst densities in northern and inland portions of bay); Baja California/Mexico/Bahía de San Quintín (reported in 1987, Cohen 2005)
Vectors
| Level | Vector |
|---|---|
| Alternate | Fisheries Intentional |
| Alternate | Ballast Water |
| Alternate | Fisheries Accidental (not Oyster) |
Regional Impacts
| Ecological Impact | Competition | |
| In Colorado Lagoon, Long Beach, CA Ruditapes philippinarum became the biomass dominant in the benthic community by 2004, as the previous dominant, the introduced Hard Clam, Mercenaria mercenaria, disappeared. Competition is possible, but when R. philippinarum appeared, M. mercenaria had already become rare (Burnaford et al. 2011). | ||