The monitoring of diet and habitat preferences indicates competitive effect of exotic Ictalurus nebulosus on native fish under food-limited conditions
Due to the increasing globalization and ongoing introduction of exotic species, native species are confronted with competitors with unknown outcomes.Catfish Ictalurus nebulosus Le Sueur, 1819 is native to eastern regions of North America.The species was introduced to some European countries, including Poland, in the 1880s for hobby and farming purp