Invasion
Invasion Description
The datas of first record for the Atlantic coast of France is unknown, but was probably in the early 20th century (Goulletquer et al. 2002)
Geographic Extent
Normandy/France/Mont-Saint-Michel Bay (1997, Gerard et al. 2003, 0-26 PSU)
Vectors
| Level | Vector |
|---|---|
| Alternate | Fisheries Accidental (not Oyster) |
| Alternate | Natural Dispersal |
| Alternate | Hull Fouling |
| Alternate | Dry Ballast |
| Alternate | Aquatic Plant Shipments |
Regional Impacts
| Ecological Impact | Competition | |
| Potamopyrgus antipodarum was the dominant gastropod in a community of freshwater snails in olgiohaline enclosed marshes, and was the only species in mesohaline marshes. This was attributed to parthenogenesis, high reproductive output, and scarcity of trematode parasites (Gerard et al. 2003). | ||