Invasion
Invasion Description
1st record: Oahu/Pearl Harbor (1929, Henry and McLauglhin 1975; Carlton and Eldredge 2009)
Geographic Extent
Honolulu (Oahu)/HI/Pearl Harbor (1915, Coles et al. 1999, 1931, Henry and McLaughlin 1975); Honolulu (Oahu)/HI/Honolulu Harbor (Henry and McLaughlin 1975); Oahu/HI/Kaneohe Bay (1959, Henry and McLaughlin 1975); Nauwilwili, Kauai/HI/Nauwilwili Harbor (Coles et al. 2004; 21 57 26.1N; 159 21 39.7W); Maui/HI/Kahulului Harbor (2003, Coles et al. 2004, 20 45 05, 156 26 9.6); Oahu/HI/Kaneohe Bay (now mostly replaced by Chthamalus proteus, in intertidal zone, Zabin 2009)
Vectors
| Level | Vector |
|---|---|
| Alternate | Hull Fouling |
| Alternate | Ballast Water |
Regional Impacts
| Ecological Impact | Competition | |
| Amphibalanus amphitrite was the dominant barnacle in sheltered coastal areas of Oahu, Hawaii (Matsuda 1973, cited by Zabin 2009). It may have been replaced by A. reticulatus, before the distribution of the latter species was severely restricted by the invasion of Chthamalus proteus, which began in 1993. However, there were no studies of barnacle populations in this area between 1973 and 2001, so the nature of the interactions between the species is unknown (Zabin 2009). | ||