Ictalurus punctatus

[...] resource overlap with subadults and adults.

It is one of the most prolific predators in the upper basin and, among the nonnative fishes, is thought to have the greatest adverse effect on endangered fish species (Hawkins and Nesler, 1991; Lentsch et al., 1996; Tyus and Saunders, 1996), primarily as a result of predation on juveniles and resource overlap with subadults and adults.

The channel catfish hybridizes with the threatened Yaqui catfish (Ictalurus pricei) in Mexico (Sublette et al., 1990; Kelsch and Jensen, 1997) while in New Mexico, it hybridizes with the native headwater catfish (I. lupus) (Kelsch and Hendricks, 1990).

The channel catfish is a major predator of razorback sucker (Xyrauchen texanus) in the Gila River (Marsh and Brooks, 1989) and along the Colorado River in California (Langhorst, 1989). Intense predation by channel catfish led to the failure of efforts to re-establish the critically endangered razorback sucker (X. texanus) in the Gila River Basin (Marsh and Brooks, 1989). Lentsch et al. (1996) identified the channel catfish as one of six non-native species in the upper Colorado River basin that is a threat to the razorback sucker; it is also the principal non-native threat to juvenile, subadult and adult Colorado pikeminnow (Ptychocheilus lucius) in the San Juan River in New Mexico.; In the James River estuary it preys upon Callinectes sapidus and Morone americana (white perch) and feeds on the spawn of M. americana, Alosa sapidissima (Atlantic shad), A. aestivalis (blueback herring) and A. pseudoharengus (alewife) (Menzel, 1945).

[...] with EICAT scores indicating “Major” impacts for both North America and Europe, at high and medium confidence levels, respectively.

EICAT feita por Haubrock et al. (2021)