| Impact ID | 7781 |
| Impact Type | Predation/Herbivory |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | The introduction of rainbow trout (Oncorhynchus mykiss) to an enclosure within a Great Lakes tributary in Ontario caused a 35% decline in stonefly abundance relative to areas without rainbow trout. Stonefly populations were adversely affected by both predation and disturbance, which led to emigration. |
| Reference | 24310 |
| Cost | |
| Location | Pine River Tributary, Ontario |