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Hidden genetic diversity and distinct evolutionarily significant units in an commercially important Neotropical apex predator, the catfish Pseudoplatystoma corruscans

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Abstract

In the South American Neotropics, several fish taxa with distributions ranging over multiple river basins might actually represent cryptic species or distinct evolutionarily significant units (ESUs). Defining hidden genetic diversity within species is of great significance to inform on programs aimed at maintaining the evolutionary potential of natural populations and to conduct appropriate fisheries management. This is particularly important in commercially exploited species, such as the “surubim” catfishes (genus Pseudoplatystoma). Here, based on evidence of reciprocal mtDNA monophyly and significant nuclear divergence in eight microsatellite markers we report on two ESUs in the widely distributed Pseudoplatystoma corruscans. The implications of these results for the conservation management, traceability of fish products and for identifying breeders for restocking programs in this important apex predator are discussed.

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Acknowledgments

The authors are grateful to several artisanal fishermen for their help with the sampling and to Arno Soares, Thiago Ushizima and Daniel Crepaldi for providing samples. We also thank Luiz Pereira and Claudio Oliveira for kindly providing COI sequences. RAT is grateful to CNPq for the research fellowship provided (PQ2). This work was supported by CNPq/FAPEMIG.

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Authors and Affiliations

  1. Curso de Pós-graduação em Zoologia de Vertebrados, Mestrado em Zoologia, Pontifícia Universidade Católica de Minas Gerais, Prédio 41, Av. Dom José Gaspar, 500 Coração Eucarístico, Belo Horizonte, MG, 30535-610, Brazil

    Daniel C. Carvalho

  2. Departamento de Zootecnia, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-010, Brazil

    Daniel C. Carvalho & Denise A. A. Oliveira

  3. Molecular Ecology Laboratory, Flinders University, Adelaide, SA, 5001, Australia

    Luciano B. Beheregaray

  4. Laboratório de Genômica Evolutiva e Ambiental, Departamento de Zoologia, Universidade Federal de Pernambuco, Recife, PE, 50670-420, Brazil

    Rodrigo A. Torres

Authors
  1. Daniel C. Carvalho
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  2. Denise A. A. Oliveira
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  3. Luciano B. Beheregaray
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  4. Rodrigo A. Torres
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Correspondence to Daniel C. Carvalho.

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Carvalho, D.C., Oliveira, D.A.A., Beheregaray, L.B. et al. Hidden genetic diversity and distinct evolutionarily significant units in an commercially important Neotropical apex predator, the catfish Pseudoplatystoma corruscans . Conserv Genet 13, 1671–1675 (2012). https://doi.org/10.1007/s10592-012-0402-6

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  • DOI: https://doi.org/10.1007/s10592-012-0402-6

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