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Crescimento e reprodução de Hyale media Dana (Amphipoda, Gammaridae, Hyalidae) associada à Sargassum cymosum C. Agardh

Growth and reproduction of Hyale media Dana (Amphipoda, Gammaridae, Hyalidae) associated to Sargassum cymosum C. Agardh

Resumo

The post-marsupial growth, sexual differentiation, fecundity and reproductive biology of Hyale media Dana, 1853 living on Sargassum cymosum C. Agardh, 1820 are described. The growth was continuous througth 12 stages for males and 9 for females. The sexual differentiation occours at 2th or 3th moult and was demonstrated by the enlargment of the gnatopod II propod. Number of eggs increased with the female head length. Observations of courtship behavior, incubation, moult processes, emergence of juveniles and brood caracteristics were made. The precopula courtship continued for two days, the eggs were incubated for six days and the juveniles, that stay until three days in the marsupium, moult every day.

Amphipods; reproduction; growth; fecundity; Sargassum


Amphipods; reproduction; growth; fecundity; Sargassum

Crescimento e reprodução de Hyale media Dana (Amphipoda, Gammaridae, Hyalidae) associada à Sargassum cymosum C. Agardh

Growth and reproduction of Hyale media Dana (Amphipoda, Gammaridae, Hyalidae) associated to Sargassum cymosum C. Agardh

Fosca Pedini Pereira Leite

Departamento de Zoologia, Instituto de Biologia, Universidade Estadual de Campinas. Caixa Postal 6109, 13083-970, Campinas, São Paulo, Brasil

ABSTRACT

The post-marsupial growth, sexual differentiation, fecundity and reproductive biology of Hyale media Dana, 1853 living on Sargassum cymosum C. Agardh, 1820 are described. The growth was continuous througth 12 stages for males and 9 for females. The sexual differentiation occours at 2th or 3th moult and was demonstrated by the enlargment of the gnatopod II propod. Number of eggs increased with the female head length. Observations of courtship behavior, incubation, moult processes, emergence of juveniles and brood caracteristics were made. The precopula courtship continued for two days, the eggs were incubated for six days and the juveniles, that stay until three days in the marsupium, moult every day.

Key words: Amphipods, reproduction, growth, fecundity, Sargassum

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AGRADECIMENTOS. À Dra. Yoko Wakabara; à Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP, Proc. nº 71/1360) e ao Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Proc. nº 300337/82-5-OC).

Recebido em 01.II.1995; aceito em 07.XI.1996.

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Datas de Publicação

  • Publicação nesta coleção
    13 Jul 2009
  • Data do Fascículo
    1996

Histórico

  • Aceito
    07 Nov 1996
  • Recebido
    01 Fev 1995
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