| Impact ID | 9130 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | In the Severn-Trent catchment area, zander (Sander lucioperca) almost exclusively prey upon roach (Rutilus rutilus). |
| Reference | 30707 |
| Cost | |
| Location | Severn-Trent Waterway area, England |