Occurrence of non-native fish species in a Neotropical river under the influence of aquaculture activities

  • Vinícius Ricardo RIBEIRO Universidade Federal do Paraná – UFPR, Programa de Pós-graduação em Aquicultura e Desenvolvimento Sustentável, Setor Palotina / Instituto Neotropical de Pesquisas Ambientais, Programa de Pós-graduação em Recursos Pesqueiros e Engenharia de Pesca, Grupo de Pesquisas em Recursos Pesqueiros e Limnologia / Instituto Neotropical de Pesquisas Ambientais, Programa de Pós-graduação em Conservação e Manejo de Recursos Naturais, Grupo de Pesquisas em Recursos Pesqueiros e Limnologia
  • Éder André GUBIANI Instituto Neotropical de Pesquisas Ambientais, Programa de Pós-graduação em Recursos Pesqueiros e Engenharia de Pesca, Grupo de Pesquisas em Recursos Pesqueiros e Limnologia / Instituto Neotropical de Pesquisas Ambientais, Programa de Pós-graduação em Conservação e Manejo de Recursos Naturais, Grupo de Pesquisas em Recursos Pesqueiros e Limnologia http://orcid.org/0000-0003-4981-0955
  • Almir Manoel CUNICO Universidade Federal do Paraná – UFPR, Programa de Pós-graduação em Aquicultura e Desenvolvimento Sustentável, Setor Palotina / Universidade Federal do Paraná – UFPR, Laboratório de Ecologia, Pesca e Ictiologia http://orcid.org/0000-0003-1203-1771


The introduction of non-native species is one of the greatest global changes and is a substantial threat to continental fish fauna. This study aimed to evaluate the composition and structure of the fish assemblage of the Azul River, a tributary along the left margin of the Piquiri River basin, to determine the occurrence, abundance and spatial distribution of non-native fish species. Sampling was carried out from February to November 2014 at three sites along the river using of electric fishing equipment. Thirty-two fish species belonging to 20 genera, 11 families and five orders were collected. Eight non-native fish species were recorded, and Gymnotus inaequilabiatus and Oreochromis niloticus were listed among the five most abundant species in the Azul River. The fish fauna followed a distribution pattern expected for the Neotropical region, with a predominance of Characiformes and Siluriformes. However, the high representativeness of the abundance of the non-native species of the Gymnotiformes and Perciformes orders highlights the potential negative impacts on the structure of the fish assemblages of the Azul River due to species introductions.


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How to Cite
RIBEIRO, Vinícius Ricardo; GUBIANI, Éder André; CUNICO, Almir Manoel. Occurrence of non-native fish species in a Neotropical river under the influence of aquaculture activities. Boletim do Instituto de Pesca, [S.l.], v. 44, n. 1, p. 80-90, dec. 2018. ISSN 1678-2305. Available at: <https://www.pesca.sp.gov.br/boletim/index.php/bip/article/view/1282>. Date accessed: 23 may 2022. doi: https://doi.org/10.20950/1678-2305.2018.288.