| Impact ID | 5370 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | In an invaded river in Poland, P. parva had limited effects on fish community composition, yet the abundance of Perca fluviatilis and Leucaspius delineatus were negatively associated with occurrence of P. parva |
| Reference | 38552 |
| Cost | |
| Location | Poland |