Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil

The present study catalogues exotic and allochthonous fish species found in the three main freshwater river drainages of Rio Grande do Sul State using records scientific collections literature, discusses impacts caused by their introduction natural environments. Ten are area, i.e., Clarias gariepinus, Coptodon rendalli, Ctenopharyngodon idella, Cyprinus carpio, Hypophthalmichthys molitrix, nobilis, Ictalurus punctatus, Micropterus salmoides, Oncorhynchus mykiss Oreochromis niloticus, belonging to five orders, nine genera seven families. These fishes native from African, Asian, European North American countries. eight species, Acestrorhynchus pantaneiro, Hoplerythrinus unitaeniatus, Hoplias lacerdae, Megaleporinus macrocephalus, Piaractus mesopotamicus, Pachyurus bonariensis, Serrasalmus maculatus, Trachelyopterus lucenai, belong genera, six families, Río La Plata basin, that includes Uruguay, have been all registered Laguna dos Patos. Two these further recorded Tramandaí system (A. pantaneiro T. lucenai). also presentes a brief history first state country, vectors introduction. According collections, two with highest number country tilapias rendalii (508 records) niloticus (376 records), most occurred last decades. carps carpio idella only drainage basins state. In addition, we warn about importance studies biology negative over on understanding management wild