| Impact ID | 6878 |
| Impact Type | Predation/Herbivory |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | Silurus glanis impacts some groups of waterbirds, especially in the Anatidae family, through predation. Research found that waterbird abundance varied significantly with the invasion sequence (advanced stage correlated with lower bird abundance). The significantly lower abundance of waterbirds in reservoirs with catfish could be due to either a direct ecological impact (predation) by Wels catfish and/or to avoidance behavior by waterbirds to reduce predation risk. |
| Reference | 35392 |
| Cost | |
| Location | Ebro River, Spain |