Updating the distribution data of recently introduced freshwater fish in the guadalquivir river basin (Spain)

Abstract

We report new distribution data on four recently introduced species in the Guadalquivir River basin: chameleon cichlid (Australoheros facetus Jenyns, 1842), North American black bullhead (Ameiurus melas Rafinesque, 1820), European catfish (Silurus glanis Linnaeus, 1758) and a minnow species of unknown origin (Phoxinus spp.). A compilation of records is used to update the distribution range of these species. The information collected reinforces the evidence on the establishment and expansion of these non-native species. We recommend new field sampling to identify the dispersal pathways and to clarify their current statuses.