Species Regional Summary
Grandidierella japonica
Pt. Conception to Southern Baja California ( NEP-VI )

Invasion History Vectors Impacts References

Invasion

Invasion Description

1st record: CA/Newport Bay (1979, Greenstein and Tiefenthaler 1997)

Geographic Extent

Santa Barbara/CA/Santa Barbara Harbor (1999, Lee 2007; Pilgrim et al. 2013); Jack's Landing/CA/Channel Islands Harbor (1998, Ranasinghe et al. 2000, Cohen et al. 2002); Anacapa Isle Marine/CA//Channel Islands Harbor ((1998, Ranasinghe et al. 2000; 2000, Cohen et al. 2002); CA/Port Hueneme (2001, Fairey et al. 2002; Pilgrim et al. 2013); Venice/CA/Marina del Rey (1998, Ranasinghe et al. 2000; 2000, Cohen et al. 2002; Pilgrim et al. 2013); Los Angeles/CA/Los Angeles Harbor (1998, Ranasinghe et al. 2000; Pilgrim et al. 2013); 2011, California Department of Fish and Wildlife 2014); Long Beach/CA/Long Beach Harbor ( 1998, Ranasinghe et al. 2000; 2011, California Department of Fish and Wildlife 2014); CA/Long Beach Harbor (2017, 1 fo 10 hard substrate survey stations,, Ruiz and Geller 2021);; Pin Rock, Santa Catalina Island/CA/Pacific Ocean (Maloney et al. 2006); CA/Newport Bay (1979, http://www.sccwrp.org/pubs/annrpt/93-94/art12.htm, ; 1998, Ranasinghe et al. 2000; Pilgrim et al. 2013); 2011, California Department of Fish and Wildlife 2014; 2017, Ruiz and Geller 2021, 6 of 10 sites) CA/Dana Point Harbor (1998, Ranasinghe et al. 2000; Pilgrim et al. 2013; 2011, California Department of Fish and Wildlife 2014); Oceanside/CA/Oceanside Harbor (2001, Fairey et al. 2002; Pilgrim et al. 2013; 2011, California Department of Fish and Wildlife 2014); San Diego/CA/Los Penasquitos Lagoon (http://www.perl.sdsu.edu/Reports/LPL03-04.pdf; Pilgrim et al. 2013); San Diego/CA/Mission Bay (1998, Ranasinghe et al. 2000; Pilgrim et al. 2013); San Diego/CA/San Diego Bay (1998, Ranasinghe et al. 2000; Pilgrim et al. 2013); San Diego/CA/Tijuana River Estuary (http://www.perl.sdsu.edu/Reports/TJReports/THE_Jan-Jun_2001.pdf; Pilgrim et al. 2013); Bahia California Norte/Mexico/Bahia San Quintin ((2004, Lee 2007, http://ecoinformatics.oregonstate.edu/henrylee.ppt; Pilgrim et al. 2013)

Vectors

Level Vector
Alternate Ballast Water
Alternate Hull Fouling
Alternate Natural Dispersal

Regional Impacts

Ecological ImpactFood/Prey
Food/Prey- Grandidierella japonica is the predominant amphipod in the Tijuana River estuary, San Diego, California. It has become a major food item for several native fishes (Longjaw Mudsucker-Gillichthys mirabilis; Staghorn Sculpin- Leptocottus armatus; California Halibot- Paralichthys californicus (West et al. 2003). In the Tijuana estuary, this amphipod was a major user of detritus from invasive Tamarix shrubs (Whitcraft et al. 2008), potentially transferring this resource from the marsh sediments to higher trophic levels.
 

References

Full Reference List for Grandidierella japonica

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