| Impact ID | 7739 |
| Impact Type | Predation/Herbivory |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | In Lake Superior, consumption of cisco (Coregonus artedi) eggs by ruffe (Gymnocephalus cernua) has been documented at a level that could impact the population over winter months. |
| Reference | 33438 |
| Cost | |
| Location | Lake Superior |