Invasion
Invasion Description
1st Record: Falmouth/MA/Vineyard Sound (1996, O'Connor 2013)
Geographic Extent
Marthas Vineyard/MA/Vineyard Sound (2006, Griffen and Delaney 2007); Falmouth/MA/Vineyard Sound (1996, O'Connor 2013)
Vectors
| Level | Vector |
|---|---|
| Alternate | Hull Fouling |
| Alternate | Natural Dispersal |
Regional Impacts
| Ecological Impact | Competition | |
| The replacement of C. maenas by H. sanguineus in rocky intertidal regions of Southern New England (from Long Island to Cape Ann) has resulted in a likely increase in predation rates, due to much higher population densities of H. sanguineus (results from field survey at one site on Marthas Vineyard, MA) (Griffen and Delaney 2007). | ||
| Ecological Impact | Predation | |
| The replacement of C. maenas by H. sanguineus in rocky intertidal regions of Southern New England (from Long Island to Cape Ann) has resulted in a likely increase in predation rates, due to much higher population densities of H. sanguineus (field survey, seen at two sites near New Bedford and Woods Hole MA) (Griffen and Delaney 2007). | ||