9 results for Silurus glanis (Wels Catfish)

Impact ID Scientific Name Impact Type Study Type Study Location Impact Description Geographic Location Reference
4216 Silurus glanis Predation/Herbivory Observational Field Silurus glanis may adapt foraging behaviors in new habitats and introduced populations have been observed to breach onto land to capture birds 35402
4217 Silurus glanis Predation/Herbivory Anecdotal N/A If established as an apex predator in an ecosystem, S. glanis can heavily impact other species through predation 35428
4218 Silurus glanis Predation/Herbivory Anecdotal N/A If established as an apex predator in an ecosystem, S. glanis can heavily impact other species through food web alterations 35428
4219 Silurus glanis Predation/Herbivory Observational Field Silurus glanis takes advantage of its diet plasticity and ability to prey upon the most abundant available species of a suitable size within its habitat 35392
6876 Silurus glanis Predation/Herbivory Observational Field In early stage invasion sites, Silurus glanis consumes small fish that are high in abundance, such as the roach (Rutilus rutilus) and bleak (Alburnus alburnus). River Ebro, Spain 35392
6877 Silurus glanis Predation/Herbivory Observational Field In advanced stage invasion sites, Silurus glanis was observed to primarily consume crayfish, such as the red swamp crayfish (Procambarus clarkii). Ebro River, Spain 35392
6878 Silurus glanis Predation/Herbivory Observational Field 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. Ebro River, Spain 35392
6879 Silurus glanis Predation/Herbivory Observational Field After the establishment of the exotic predator Silurus glanis, some native species significantly declined in abundance and biomass (i.e. Alburnus arborella and Scardinius erythrophthalmus) or disappeared (i.e. Rutilus aula and Tinca tinca). Po River basin, Italy 35363
6880 Silurus glanis Predation/Herbivory Observational Field Silurus glanis may adapt foraging behaviors in new habitats. Introduced populations have started breaching onto shores to capture birds (i.e. pigeons, Columba livia) on land. Tarn River, France 42074

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