Species Regional Summary
Jassa marmorata
Pt. Conception to Southern Baja California ( NEP-VI )

Invasion History Vectors Impacts References

Invasion

Invasion Description

1st Records: Los Angeles-Long Beach/CA/Los Angeles-Long Beach Harbors (as J. fancata, Barnard 1958); CA/San Diego Bay (Conlan 1990); La Jolla/CA/(Conlan 1990); Bird Rock, Catalina Island/CA/Pacific Ocean (Conlan 1990); Catalina Island/CA/Avalon Harbor (Conlan 1990)

Geographic Extent

CA/San Diego Bay (Conlan 1990; 2011, California Department of Fish and Wildlife 2014); La Jolla/CA/(Conlan 1990); Bird Rock, Catalina Island/CA/Pacific Ocean (Conlan 1990); Catalina Island/CA/Avalon Harbor (Conlan 1990); Los Angeles-Long Beach/CA/Los Angeles-Long Beach Harbors (as J. fancata, Barnard 1958); Long Beach Yacht Club/CA/Alamitos Bay (2000, Cohen et al. 2002); Pilots' Dock, Pier F, Long Beach/CA/Long Beach Harbor (2000, Cohen et al. 2002); Newmark's Yacht Harbor , Los Angeles/CA/Los Angeles Harbor (2000, Cohen et al. 2002); Port Hueneme/CA/ Port Hueneme (2001, Fairey et al. 2002); Jack's Landing /CA/Channel Island Harbor (2000, Cohen et al. 2002); Baja California.Mexico/Magdalena Bay (Conlan 1990)

Vectors

Level Vector
Alternate Hull Fouling
Alternate Ballast Water

Regional Impacts

Economic ImpactShipping/Boating
Jassa marmorata fouls pilings in Los Angeles-Long Beach Harbor, covering them with masses of tubes covered with sediment, but perhaps provides a benefit by discouraging boring organisms (Barnard 1958).
 
Ecological ImpactHabitat Change
Dense masses of amphipod tubes may discourage settlement by boring organisms and other foulers, such as the tunicate Ciona intestinalis (Barnard 1958). They also may provide habitat for other organisms, such as predatory polychaetes (Barnard 1950).
 

References

Barnard, J. Laurens (1958) Amphipod crustaceans as fouling organisms in Los Angeles-Long Beach Harbors, with reference to the influence of seawater turbidity, California Fish and Game 44(2): 161-170

California Department of Fish and Wildlife (2014) Introduced Aquatic Species in California Bays and Harbors, 2011 Survey, California Department of Fish and Wildlife, Sacramento CA. Pp. 1-36

Cohen, Andrew N. and 12 authors (2002) Project report for the Southern California exotics expedition 2000: a rapid assessment survey of exotic species in sheltered coastal waters., In: (Eds.) . , Sacramento CA. Pp. 1-23

Conlan, Kathleen E. (1990) Revision of the crustacean amphipod genus Jassa (Corophioidea: Ischyroceridae)., Canadian Journal of Zoology 68: 2031-2075

Fairey, Russell; Dunn, Roslyn; Sigala, Marco; Oliver, John (2002) <missing title>, California Department of Fish and Game, Sacramento. Pp. <missing location>


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