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Substratum choice for nesting in male Nile tilapia Oreochromis niloticus

Authors

  • F. Z. Mendonça,

    1. University of São Paulo State, Aquaculture Center of UNESP, Research Center of Animal Welfare (RECAW), Dep. Zoologia e Botânica. R. Cristóvão Colombo, 2265, CEP 15054-000, São José do Rio Preto, SP, Brasil
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  • G. L. Volpato,

    1. University of São Paulo State, Aquaculture Center of UNESP, Research Center of Animal Welfare (RECAW), Dep. Fisiologia, IBB, P.O. Box 510, Rubião Jr. s/n, CEP 18618-000, Botucatu, SP, Brasil
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  • R. S. Costa-Ferreira,

    1. University of São Paulo State, Aquaculture Center of UNESP, Research Center of Animal Welfare (RECAW), Dep. Zoologia e Botânica. R. Cristóvão Colombo, 2265, CEP 15054-000, São José do Rio Preto, SP, Brasil
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  • E. Gonçalves-de-Freitas

    Corresponding author
    1. University of São Paulo State, Aquaculture Center of UNESP, Research Center of Animal Welfare (RECAW), Dep. Zoologia e Botânica. R. Cristóvão Colombo, 2265, CEP 15054-000, São José do Rio Preto, SP, Brasil
      Tel.: +55 17 3221 2375; fax: +55 17 3221 2374; email: elianeg@ibilce.unesp.br
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Tel.: +55 17 3221 2375; fax: +55 17 3221 2374; email: elianeg@ibilce.unesp.br

Abstract

Four substrata were offered to groups of adult Nile tilapia Oreochromis niloticus (one male and two females) simultaneously: pure sand, a mixture of sand and shells, stones and no substratum. The results showed that males chose to dig nests in a lighter and more homogeneous substratum.

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