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Observations on the seasonal breeding biology and fine structure of the egg surface in the white piranha Serrasalmus brandtii from the São Francisco River basin, Brazil

Authors

  • K. Honorato-Sampaio,

    1. Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, C P 486, 30161-970 Belo Horizonte, Minas Gerais, Brazil
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  • G. B. Santos,

    1. Programa de Pós-Graduação em Zoologia de Vertebrados-Pontifícia Universidade Católica de Minas Gerais, 30535-610 Belo Horizonte, Minas Gerais, Brazil
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  • N. Bazzoli,

    1. Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, C P 486, 30161-970 Belo Horizonte, Minas Gerais, Brazil
    2. Programa de Pós-Graduação em Zoologia de Vertebrados-Pontifícia Universidade Católica de Minas Gerais, 30535-610 Belo Horizonte, Minas Gerais, Brazil
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  • E. Rizzo

    Corresponding author
    1. Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, C P 486, 30161-970 Belo Horizonte, Minas Gerais, Brazil
      Tel.: +55 31 3409 2785; fax: +55 31 3409 2771; email: ictio@mono.icb.ufmg.br
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Tel.: +55 31 3409 2785; fax: +55 31 3409 2771; email: ictio@mono.icb.ufmg.br

Abstract

In the Juramento Reservoir, south-eastern Brazil, the white piranha Serrasalmus brandtii showed a prolonged reproductive season, with evidence for multiple spawning and a reproductive peak associated with seasonal rains. The egg surface exhibited a honeycomb-like pore canal arrangement and an adhesive apparatus surrounding the micropyle. Electron microscopic analysis suggests a role for the micropylar cell and neighbouring follicular cells in secretion of substances for egg attachment.

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