| Impact ID | 7758 |
| Impact Type | Genetic |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Hybrids of white perch (Morone americana) and yellow perch (Morone mississippiensis) were first found in 2000 in the middle Illinois River. Hybridization and competition may represent another threat to the already dwindling yellow bass of that region. |
| Reference | 13977 |
| Cost | |
| Location | Illinois River, USA |