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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

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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.

Keywords: Juramento Reservoir; egg attachment; micropyle; reproduction; spawning; zona radiata

Document Type: Research Article


Affiliations: 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

Publication date: 2009-11-01

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