Invasion
Invasion Description
1st Record: Douglas Point/MD/Potomac River (tidal freshwater, Dahlberg et al. 1973, cited by Pfitzenmeyer et al. 1976); 1st nontidal record: Virginia State Bass Hatchery, Stevensville/VA/York River watershed (1961, Tenney and Woolcott 1962).
Geographic Extent
Virginia State Bass Hatchery, Stevensville/VA/York River watershed (nontidal, 1961, Tenney and Woolcott 1962); Lock 5, Chesapeake & Ohio Canal/MD/Potomac River watershed (nontidal, Banta and Backus 1991); Douglas Point/MD/Potomac River (tidal freshwater, Dahlberg et al. 1973, cited by Pfitzenmeyer et al. 1976)
Vectors
| Level | Vector |
|---|---|
| Alternate | Fisheries Accidental (not Oyster) |
| Alternate | Aquatic Plant Shipments |
| Alternate | Natural Dispersal |