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Ciclo reprodutivo do mexilhão Perna perna (Linnaeus) (Molusca, Bivalvia) da Lagoa de Itaipu, Niterói, Rio de Janeiro, Brasil

Reproductive cycle of Perna perna (Linnaeus) from Itaipu Lagoon, Niterói, Rio de Janeiro, Brazil

Resumo

The gametogenic aspects of mussel Perna perna (Linnaeus, 1758) from Itaipu Lagoon, Niterói, were studied through November 1998 to October 1999. Microscopic analysis was carried out at low and high dry magnifications, as well as under oil immersion. The animals collected showed variation of size from 4.8 to 9.1 cm in total length and from 2.0 to 3.9 cm in total width. Most advanced gonadal stage was detected through May, August and October of 1999 for female specimens. Male advanced gonadal stage occurred in September of the same year. The sex-ratio (M:F) for P. perna was 64:52.

Perna perna; gonadal cycle; special-staining methods; Itaipu Lagoon; Rio de Janeiro


Perna perna; gonadal cycle; special-staining methods; Itaipu Lagoon; Rio de Janeiro

Ciclo reprodutivo do mexilhão Perna perna (Linnaeus) (Molusca, Bivalvia) da Lagoa de Itaipu, Niterói, Rio de Janeiro, Brasil

Reproductive cycle of Perna perna (Linnaeus) from Itaipu Lagoon, Niterói, Rio de Janeiro, Brazil

Eliana de Fátima Marques de MesquitaI,II; Marta Guimarães de AbreuIII; Francisco Carlos de LimaI

IDepartamento de Tecnologia de Alimentos, Universidade Federal Fluminense. Rua Dr. Vital Brazil Filho 64, 24230-340 Niterói, Rio de Janeiro, Brasil. E-mail: eliana@esquadro.com.br

IIBolsista do CNPq

IIIBolsista Iniciação Científica FAPERJ/UFF

ABSTRACT

The gametogenic aspects of mussel Perna perna (Linnaeus, 1758) from Itaipu Lagoon, Niterói, were studied through November 1998 to October 1999. Microscopic analysis was carried out at low and high dry magnifications, as well as under oil immersion. The animals collected showed variation of size from 4.8 to 9.1 cm in total length and from 2.0 to 3.9 cm in total width. Most advanced gonadal stage was detected through May, August and October of 1999 for female specimens. Male advanced gonadal stage occurred in September of the same year. The sex-ratio (M:F) for P. perna was 64:52.

Key words: Perna perna, gonadal cycle, special-staining methods, Itaipu Lagoon, Rio de Janeiro

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Recebido em 27.IV.2000; aceito em 12.VI.2001

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Datas de Publicação

  • Publicação nesta coleção
    04 Maio 2009
  • Data do Fascículo
    Jun 2001

Histórico

  • Aceito
    12 Jun 2001
  • Recebido
    27 Abr 2000
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