Acessibilidade / Reportar erro
• Rev. Bras. Zool. 17 (4) • Dez 2000 • https://doi.org/10.1590/S0101-81752000000400016   copiar

Distribuição de densidade e estrutura populacional de Pilumnus dasypodus Kingsley (Crustacea, Decapoda, Xanthidae) na Ilha do Farol, Matinhos, Paraná, Brasil

Density distribution and population structure of Pilumnus dasypodus Kingsley (Crustacea, Decapoda, Xanthidae) from Farol Isle, Matinhos, Paraná, Brazil

Autoria SCIMAGO INSTITUTIONS RANKINGS

Resumo

A study of the population of the xanthid crab Pilumnus dasypodus Kingsley, 1879 from rocky shore at the Farol Isle (25º51'S and 48º32'W) was carried out in the following aspects: temporal and spatial distributions of density, annual fluctuation of the sex ratio, size composition of the population and reproductive activities of the species. Monthly, four leveis in relation to emmersion time within intertidal zone were sampled, from May/90 to April/91, but Pilumnus dasypodus was obtained only in the levels 2, 3 and 4. The surface water temperature ranged from 16.0ºC (July/90) to 28.0ºC (February/91). A total of 775 individuais of Pilumnus dasypodus were collected among which, 92 were ovigerous females. The population density ranged from 14.63 ind.m-3 (February/91) to 148.00 ind.m-3 (March/91). Higher densities were observed in the level 4, a local of permanent submersion. The sex ratio was 1:1 in almost all months. The carapace width varied from 1.01 to 8.28 mm for males, from 1.01 to 7.18 mm for females and 0.01 to 1.00 mm for juveniles. The fecundity ranged from 81 to 1834 eggs per female. The species has continuous reproduction with two peaks of recruiting in the year. There was a positive relationship, with weak correlation rate, between the carapace width of the ovigerous females and the number of eggs in the abdomen. The rocky shore at Farol Isle is a complex environment which harbor the decapod Pilumnus dasypodus, for breeding and surviving.

Pilumnus dasypodus; population structure; Farol Isle; Paraná State

Pilumnus dasypodus; population structure; Farol Isle; Paraná State

Distribuição de densidade e estrutura populacional de Pilumnus dasypodus Kingsley (Crustacea, Decapoda, Xanthidae) na Ilha do Farol, Matinhos, Paraná, Brasil1 1 Contribuição número 1172 do Departamento de Zoologia, Universidade Federal do Paraná.

Density distribution and population structure of Pilumnus dasypodus Kingsley (Crustacea, Decapoda, Xanthidae) from Farol Isle, Matinhos, Paraná, Brazil

Cláudia Regina BosaI; Setuko MasunariII

ICurso de Pós-graduação em Zoologia, Departamento de Zoologia, Universidade Federal do Paraná. Bolsista da CAPES

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

ABSTRACT

A study of the population of the xanthid crab Pilumnus dasypodus Kingsley, 1879 from rocky shore at the Farol Isle (25º51'S and 48º32'W) was carried out in the following aspects: temporal and spatial distributions of density, annual fluctuation of the sex ratio, size composition of the population and reproductive activities of the species. Monthly, four leveis in relation to emmersion time within intertidal zone were sampled, from May/90 to April/91, but Pilumnus dasypodus was obtained only in the levels 2, 3 and 4. The surface water temperature ranged from 16.0ºC (July/90) to 28.0ºC (February/91). A total of 775 individuais of Pilumnus dasypodus were collected among which, 92 were ovigerous females. The population density ranged from 14.63 ind.m-3 (February/91) to 148.00 ind.m-3 (March/91). Higher densities were observed in the level 4, a local of permanent submersion. The sex ratio was 1:1 in almost all months. The carapace width varied from 1.01 to 8.28 mm for males, from 1.01 to 7.18 mm for females and 0.01 to 1.00 mm for juveniles. The fecundity ranged from 81 to 1834 eggs per female. The species has continuous reproduction with two peaks of recruiting in the year. There was a positive relationship, with weak correlation rate, between the carapace width of the ovigerous females and the number of eggs in the abdomen. The rocky shore at Farol Isle is a complex environment which harbor the decapod Pilumnus dasypodus, for breeding and surviving.

Key words:Pilumnus dasypodus, population structure, Farol Isle, Paraná State

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

AGRADECIMENTOS. Ao Prof. Joel Maurício Corrêa da Rosa e à acadêmica Márcia Kotelok do Departamento de Estatística da Universidade Federal do Paraná, pelas análises estatísticas do presente estudo. Aos biólogos Dra Janete Dubiaski da Silva, Dra Edinalva Oliveira, Dr. Joaquim Olinto Branco, Dra. Vânia Graciele Lezan Kowalczuk e André Henrique Gaida Sicuro pela coleta do material biológico do presente estudo. A Pryscilla Fanini Wowk, bolsista de Iniciação Científica, pela arte final da figura 4 do presente trabalho.

Recebido em 30.IX.1999; aceito em 21.XII.2000.

  • Barnes, R.S.K & R.N. Hughes. 1988. An introduction to marine ecology. London, Blackwell, 351p.
  • Branco, J.O. & S. Masunari. 1992. Estrutura populacional de Callinectes danae Smith, 1869 (Decapoda, Portunidae) da Lagoa da Conceição, SC. Acta Biol. Paranense, Curitiba, 21(1-4):37-56.
  • Brewer, R. 1994. The science of ecology. Philadelphia, Saunders, VIII+773p.
  • Calado, T.C. & P.R. Lacerda. 1993. Zonação vertical e variação sazonal da carcinofauna (Decapoda e Isopoda) do costão rochoso de Calhetas (Cabo-Pernambuco-Brasil). Arq. Biol. Tecnol., Curitiba, 36(4):731-738.
  • Fransozo A.; M. Negreiros-Fransozo; F.L.M. Mantelatto; M. Pinheiro & S. Santos. 1992. Composição dos Brachyura (Crustacea, Decapoda) do sublitoral não consolidado na Enseada da Fortaleza, Ubatuba (SP). Rev. Brasil. Biol. 52(4):667-675.
  • Levinton, J.S. 1982. Marine ecology. New Jersey, Prentice-Hall, XV+526p.
  • Masunari, S. & J. Dubiaski-Silva. 1998. Crustacea Decapoda da praia rochosa da Ilha do Farol, Matinhos, Paraná. II. Distribuição espacial de densidade das populações. Revta bras. Zool. 15(3):643-664.
  • Masunari, S.; E. Oliveira & V.G.L. Kowalczuk. 1998. Crustacea Decapoda da praia rochosa da Ilha do Farol, Matinhos, Paraná. I. Distribuição temporal de densidade das populações. Revta bras. Zool. 15(1):219-239.
  • MELO, G.A.S. 1996. Manual de identificação dos Brachyura (caranguejos e siris) do litoral brasileiro. São Paulo, FAPESP-Plêiade, 603p.
  • Oliveira, E. & S. Masunari. 1995. Estrutura populacional de Petrolisthes armatus (Gibbes, 1850) (Decapoda, Anomura, Porcellanidae) da Ilha do Farol, Caiobá, Paraná. Revta bras. Zool. 12(2):355-371.
  • Sastry, A.N. 1983. Ecological aspects of reproduction, p. 179-270. In: F.J. Vernberg & W.B. Vernberg (Eds). Environmental adaptations. The biology of Crustacea. New York, Academic, Vol. 8, XXVI+383p.
  • Wenner, A.M. 1972. Sex ratio as a function of size in marine Crustacea. Amer. Natur. 106(949):321-350.
  • Williams, A.B. 1984. Shrimps, lobsters, and crabs of the Atlantic coast of the Eastern United States, Maine to Florida. Washington, Smithsonian Institution Press, XVIII+550p.
  • 1
    Contribuição número 1172 do Departamento de Zoologia, Universidade Federal do Paraná.

    • Datas de Publicação

    • Publicação nesta coleção
      30 Abr 2009
    • Data do Fascículo
      Dez 2000

    Histórico

    • Aceito
      21 Dez 2000
    • Recebido
      30 Set 1999
    Creative Common - by-nc 4.0
    This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
    Sociedade Brasileira de Zoologia Caixa Postal 19020, 81531-980 Curitiba PR Brasil, Tel./Fax: +55 41 3266-6823, - Curitiba - PR - Brazil
    E-mail: sbz@bio.ufpr.br
    Acompanhe os números deste periódico no seu leitor de RSS