Invasion
Invasion Description
1st Record: NY/Hudson River estuary, river km 90 (1976, Smith and Lake 1990)
Geographic Extent
NY/Hudson River estuary, river km 90 (1976, Smith and Lake 1990); NY/Hudson River estuary, river km 124 (1979, Smith and Lake 1990); NY/Lower Hudson River (Daniels et al. 2005, established, increasing
Vectors
| Level | Vector |
|---|---|
| Alternate | Fisheries Intentional |
| Alternate | Canal |
Regional Impacts
| Ecological Impact | Competition | |
| Ictalurus punctatus (Channel Catfish) are increasing in abundance in the Hudson River estuary, while A. catus (White Catfish) are declining (Jordan et al. 2004). Sampling in the estuary indicates some differences in habitat use between the species, with I. punctatus being more flexible according to feeding opportunities. Growth rate was faster in I. punctatus. Jordan et al. (2004) suggest that these features are contributing to a shift in abundance in favor of I. punctatus in the Hudson River. Similar shifts in abundance are reported in the Connecticut and Delaware estuaries (Jordan et al. 2004). | ||