| Impact ID | 9557 |
| Impact Type | Predation/Herbivory |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | In the Great Lakes, adult Alosa pseudoharengus predate upon Cercopagis pengoi, but they do not predate as juveniles. |
| Reference | 43134 |
| Cost | |
| Location | Great Lakes |