Invasion
Invasion Description
1st record: Wakayama/Japan/Pacific Ocean (1932, Asakura 1992)
Geographic Extent
Wakayama/Japan/Pacific Ocean (1932, Asakura 1992); Tokyo/Japan/Tokyo Bay (Asakura 1992)
Vectors
| Level | Vector |
|---|---|
| Probable | Ballast Water |
| Alternate | Hull Fouling |
Regional Impacts
| Economic Impact | Fisheries | |
| Heavy settlement of H. elegans in oyster beds in Hiroshima Bay, Japan reduced oyster settlement and caused extensive mortality (Miura and Kajihara 1984, cited by Hewitt et al. 2008). | ||
| Ecological Impact | Competition | |
| Heavy settlement of H. elegans in oyster beds in Hiroshima Bay, Japan reduced oyster settlement and caused extensive mortality (Miura and Kajihara 1984, cited by Hewitt et al. 2008). | ||
| Ecological Impact | Habitat Change | |
| Heavy settlement of H. elegans in oyster beds in Hiroshima Bay, Japan reduced oyster settlement and caused extensive mortality (Miura and Kajihara 1984, cited by Hewitt et al. 2008). | ||