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Reproductive aspects of Cyphocharax voga (Hensel) from Custódias Lagoon, Rio Grande do Sul, Brazil (Characiformes, Curimatidae)

Abstract

The aim of this study was to analyse the reproductive period, fecundity and the size of the first gonadal maturation of Cyphocharax voga (Hensel, 1869) of Custódias Lagoon, state of Rio Grande do Sul, Brazil. The specimens (293 males and 247 females) were collected monthly, during the period between October 1994 and September 1995. The reproductive period took place from early winter until the end of spring. The average absolute fecundity was 36608 oocytes. The size of the first gonadal maturation was estimated in 121 and 128 mm for males and females respectively.

Curimatidae; Cyphocharax voga; fecundity; reproduction


Reproductive aspects of Cyphocharax voga (Hensel) from Custódias Lagoon, Rio Grande do Sul, Brazil (Characiformes, Curimatidae)

Lúcia Cabral SchifinoI; Clarice Bernhardt FialhoII; José Roberto VeraniIII

ICurso de Pós-graduação em Ecologia, Universidade Federal do Rio Grande do Sul. Avenida Bento Gonçalves 9500, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil

IIDepartamento de Zoologia, Laboratório de Ictiología, Universidade Federal do Rio Grande do Sul. Avenida Paulo Gama, 90046-900 Porto Alegre, Rio Grande do Sul, Brazil

IIIDepartamento de Hidrobiología, Universidade Federal de São Carlos. Caixa Postal 676, 13560-000 São Carlos, São Paulo, Brazil

ABSTRACT

The aim of this study was to analyse the reproductive period, fecundity and the size of the first gonadal maturation of Cyphocharax voga (Hensel, 1869) of Custódias Lagoon, state of Rio Grande do Sul, Brazil. The specimens (293 males and 247 females) were collected monthly, during the period between October 1994 and September 1995. The reproductive period took place from early winter until the end of spring. The average absolute fecundity was 36608 oocytes. The size of the first gonadal maturation was estimated in 121 and 128 mm for males and females respectively.

Key words: Curimatidae, Cyphocharax voga, fecundity, reproduction

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ACKNOWLEDGEMENTS. We thank Prof. Dr. José Schifino for all the help, suggestions and encouragement. Pos-graduate Course of Ecologia, Federal University of Rio Grande do Sul, for laboratory facilities. Financial support was provided by the CAPES.

Recebido em 25.IV.1997; aceito em 17.VIII.1998.

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Publication Dates

  • Publication in this collection
    10 July 2009
  • Date of issue
    1998

History

  • Received
    25 Apr 1997
  • Accepted
    17 Aug 1998
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