Distribution of non-native suckermouth armoured catfish Pterygoplichthys ambrosettii in the upper Parana River basin, Brazil

This study describes the invasion of the upper Parana River basin by Pterygoplichthys ambrosettii based on a literature review and field samples. Pterygoplichthys ambrosettii has been reported in 42 localities throughout the upper Parana River basin, including the Tiete, Paranapanema, Parana, Grande and Aguapei rivers. The ascent of P. ambrosettii after the inundation of the Sete Quedas Falls on the Parana River and the release of individuals by aquarium hobbyists were the primary drivers of this invasion.