| Impact ID | 6784 |
| Impact Type | Competition |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Perccottus glenii has been implicated in the decrease in populations of native species Umbra krameri, Carassius carassius and Leucaspius delineatus which were abundant in the past through competition for identical habitat requirements. |
| Reference | 42051 |
| Cost | |
| Location | Slovakia |