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Biologia reprodutiva de Aegla castro Schmitt (Crustacea, Anomura, Aeglidae) no Buraco do Padre, Ponta Grossa, Paraná, Brasil

Reproductive biology of Aegla castro Schmitt (Crustacea, Anomura, Aeglidae) from Buraco do Padre, Quebra-Perna River, Ponta Grossa, Paraná State, Brazil

Resumo

The reproductive biology of Aegla caslro Schmitt, 1942 from Buraco do Padre, Ponta Grossa, Paraná State, was analyzed. The sampling was done monthly, from February/97 to January/98 with aid of hand net and screens at three stations, under an effort of 120 minutes. The mean air temperature ranged from 15.0ºC (May, July, September and October) to 24.3ºC (December and January), and the water temperature from 15.8ºC (July) to 22.3ºC (December). The dissolved oxygen oscillated from 95.7% (March) to 100.2% saturation (August) and the pH from 6.1 (July) to 7.2 (September). A total of 827 specimens were obtained among which 384 males, 311 females and 132 juveniles. Males predominated over females, but the sex ratio followed the standard model of 1:1. Juveniles were found during all the study period, except in May and September. The peaks of their frequency curve occurred in April and December. The reproduction is discontinuous type with greater intensity in the colder months, from May to October. The females take part of the reproduction for two consecutive years and the species longevity was estimated in two years. The carapace length of the various development stages ranged as following: juveniles < 6.4 mm, immature females and males = from 6.5 to 12.2 mm and mature females and males = from 12.3 to 29.5 mm.

Aegla castro; reproduction; recruitment; Ponta Grossa; Paraná State


Aegla castro; reproduction; recruitment; Ponta Grossa; Paraná State

Biologia reprodutiva de Aegla castro Schmitt (Crustacea, Anomura, Aeglidae) no Buraco do Padre, Ponta Grossa, Paraná, Brasil1 1 Contribuição número 1226 do Departamento de Zoologia, Universidade Federal do Paraná.

Reproductive biology of Aegla castro Schmitt (Crustacea, Anomura, Aeglidae) from Buraco do Padre, Quebra-Perna River, Ponta Grossa, Paraná State, Brazil

Bianca de Paula Swiech-AyoubI,II; Setuko MasunariI

IDepartamento de Zoologia, Universidade Federal do Paraná. Caixa Postal 19020, 81531-990 Curitiba, Paraná, Brasil. E-mail: setmas@bio.ufpr.br

IICurso de Pós-graduação em Ciências Biológicas, Zoologia. Departamento de Zoologia, Universidade Federal do Paraná. Caixa Postal 19020, 81531-990 Curitiba, Paraná, Brasil. Bolsista da CAPES

ABSTRACT

The reproductive biology of Aegla caslro Schmitt, 1942 from Buraco do Padre, Ponta Grossa, Paraná State, was analyzed. The sampling was done monthly, from February/97 to January/98 with aid of hand net and screens at three stations, under an effort of 120 minutes. The mean air temperature ranged from 15.0ºC (May, July, September and October) to 24.3ºC (December and January), and the water temperature from 15.8ºC (July) to 22.3ºC (December). The dissolved oxygen oscillated from 95.7% (March) to 100.2% saturation (August) and the pH from 6.1 (July) to 7.2 (September). A total of 827 specimens were obtained among which 384 males, 311 females and 132 juveniles. Males predominated over females, but the sex ratio followed the standard model of 1:1. Juveniles were found during all the study period, except in May and September. The peaks of their frequency curve occurred in April and December. The reproduction is discontinuous type with greater intensity in the colder months, from May to October. The females take part of the reproduction for two consecutive years and the species longevity was estimated in two years. The carapace length of the various development stages ranged as following: juveniles < 6.4 mm, immature females and males = from 6.5 to 12.2 mm and mature females and males = from 12.3 to 29.5 mm.

Key words: Aegla castro, reproduction, recruitment, Ponta Grossa, Paraná State

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AGRADECIMENTOS. À CAPES, na pessoa de seu Presidente, pela Bolsa de Mestrado concedida a B.P. Swiech-Ayoub. Ao Sr. Ferdinando Schaeffer, pela permissão do acesso à sua propriedade para execução do presente projeto. Ao Prof. Dr. Paulo Pezzuto da Universidade do Vale do Itajaí e ao Prof. Dr. José Marcelo Aranha da Universidade Federal do Paraná, pela leitura crítica do trabalho. Às colegas de trabalho Cláudia, Edinalva e Bárbara, pelo precioso auxílio nos trabalhos dc campo.

Recebido em 28.XII.2000; aceito em 28.VIII.2001.

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  • 1
    Contribuição número 1226 do Departamento de Zoologia, Universidade Federal do Paraná.
  • Datas de Publicação

    • Publicação nesta coleção
      08 Maio 2009
    • Data do Fascículo
      Set 2001

    Histórico

    • Recebido
      28 Dez 2000
    • Aceito
      28 Ago 2001
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