| Impact ID | 9842 |
| Impact Type | Predation/Herbivory |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | In 1979, Flathead Catfish in the Cape Fear River fed primarily on Bullheads Ameiurus spp. However, by 1986, Bullhead populations had declined and Flathead Catfish had switched to preying on Shad (Clupeidae). |
| Reference | 1340 |
| Cost | |
| Location | North Carolina |