Invasion
Invasion Description
1st Record: Trois Rivieres-Ile d'Orleans/Quebec/St. Lawrence River estuary (1977, Vincent et al. 1981)
Geographic Extent
Ile la Plate, Lake St. Louis/Quebec/St. Lawrence River (7/9/1942, # 228843, Univerity of Michigan 2013); Trois Rivieres-Ile d'Orleans/Quebec/St. Lawrence River estuary (1977, Vincent et al. 1981);
Vectors
| Level | Vector |
|---|---|
| Alternate | Natural Dispersal |
| Alternate | Dry Ballast |
| Alternate | Packing Material |
Regional Impacts
| Ecological Impact | Parasite/Predator Vector | |
| Bithynia tentaculata was a host to two exotic digenean parasites, Cyathocotyle bushiensis and Sphaeridiotrema pseudoglobulus, native to Eurasia, which caused extensive mortality to dabbling ducks (dabbling ducks, including Mallards- Anas platyrhynchos, Black Ducks- A. rubiripes, Pintail - A. acuta, Blue-Winged Teal - A. discors, and Lesser Scaup- Athya affinis) in the lower St. Lawrence River valley, including Gentilly, Quebec on the tidal river, from the 1960s through the 1980s (Hoeve and Scott 1988; MacRae and Lepitzki 1994). | ||
| Economic Impact | Fisheries | |
| Hunting/Wildlife- Extensive mortalities of waterfowl (dabbling ducks and Lesser Scaup), along the lower St. Lawrence River, caused by 2 species of exotic trematodes carried by Bithynia tentaculata, were a concern of wildlife managers in the 1960s-1980s (Hoeve and Scott 1988; MacRae and Lepitzki 1994). | ||