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Substratum choice for nesting in male Nile tilapia Oreochromis niloticus
F Z Mendonça1, G L Volpato, R S Costa-Ferreira
1University 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.
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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