Invasion
Invasion Description
1st Record: Oak Beach/NY/Atlantic Ocean (1993, USGS Nonindigenous Aquatic Species Program 2008)
Geographic Extent
Oak Beach/NY/Atlantic Ocean (1993, USGS Nonindigenous Aquatic Species Program 2008); South Shore of Long Island/NY/Atlantic Ocean (1994, McDermott 1998); Montauk, Long Island/NY/Atlantic Ocean (2006, Griffen and Delaney 2007); Point Lookout/NY/Reynolds Channel, South Oyster Bay (Freeman et al. 2016, 2012-213, 4035037.9700N, 73350, 26.7900W)
Vectors
| Level | Vector |
|---|---|
| Alternate | Ballast Water |
| Alternate | Hull Fouling |
| Alternate | Natural Dispersal |
Regional Impacts
| 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 one site near Montauk, NY (Griffen and Delaney 2007). Predation by H. sanguineus on Molgula manhattensis altered the composition of fouling communities, favoring the introduced tunicates Botryllus violaceus and Diplosoma listerianum (Freeman et al. 2016). | ||