| Impact ID | 8375 |
| Impact Type | Predation/Herbivory |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Evidence thus suggests that Cercopagis pengoi (fishhook flea) may have played a role in the decline of zooplankton abundance in Lake Ontario. It does not appear, however, that zooplankton species richness has been altered as a result of C. pengoi invasion. |
| Reference | 19593 |
| Cost | |
| Location | Lake Ontario, USA |