Establishment of the non-native fish Metynnis lippincottianus (Cope 1870) (Characiformes: Serrasalmidae) in lower São Francisco River,northeastern Brazil |
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| Authors: | Daniel Alvares Silveira de Assis Vinícius Augusto Dias-Filho André Lincoln Barroso Magalhães Marcelo Fulgêncio Guedes Brito |
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| Institution: | 1. Universidade Federal de Sergipe, Programa de Pós-Gradua??o em Ecologia e Conserva??o, S?o Cristóv?o, Brazilbio.dasa@gmail.com;3. Companhia de Desenvolvimento dos Vales do S?o Francisco e Parnaíba, Centro Integrado de Recursos Pesqueiros e Aquicultura de Itiúba, Projeto Itiúba, Porto Real do Colégio, Brazil;4. Programa de Pós-Gradua??o em Tecnologias para o Desenvolvimento Sustentável, Universidade Federal de S?o Jo?o Del Rei, Ouro Branco, Brazil;5. Universidade Federal de Sergipe, Programa de Pós-Gradua??o em Ecologia e Conserva??o, S?o Cristóv?o, Brazil |
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| Abstract: | Alterations in the hydrologic regime downstream from hydroelectric dams create a high invasibility to non-native species. This study aims to analyze the establishment of non-native Metynnis lippincottianus downstream of the Xingó Dam, lower São Francisco River, Brazil. Adults in reproduction were found throughout the study. Gonadosomatic index was higher in the reproductive phases and the species produces a large number of small oocytes. Hydrometric level and water flow data after the construction of Xingó Dam showed decrease in both parameters, facilitating the establishment of M. lippincottianus. Management actions are suggested to reduce the threat on the native biota. |
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| Keywords: | Biological invasion gonadosomatic index invasibility invasiveness reproduction |
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