Invasion
Invasion Description
1st Record: many locations/PA/Delaware River drainage (Bowers 1911)
Geographic Extent
Jamison City/PA/Painer Den Pond (Delaware River Drainage); Oaks/PA/Schuylkill River; Trenton-Philadelphia-Wilmington/NJ-PA-DE/Delaware River; (Horoowitz 1986; Raasch and Altemus 1991; Weisberg et al. 1996); PA/Schuylkill River (Fairchild et al. 1998); DE/Chesapeake and Delaware Canal; NJ/Alloway Creek (Smith 1971); DE/Appoquinimick Creek (Smith 1971)
Vectors
| Level | Vector |
|---|---|
| Probable | Fisheries Intentional |
Regional Impacts
| Ecological Impact | Competition | |
| White catfish (Ameiurus catus) populations have declined, while Channel Catfish abundance has increased in the Delaware River estuary, since the 1970s. Channel Catfish had faster growth and greater longevity than White Catfish. However, ongoing stocking of Channel catfish and fluctuation in recruitment of both species make assessment of competition uncertain (Keller 2007). | ||