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Crescimento relativo e determinação da idade na fase juvenil de Armases angustipes (Dana) (Decapoda, Brachyura, Grapsidae)

Relative growth and age determination of juvenile crab ofArmases angustipes (Dana) (Decapoda, Brachyura, Grapsidae)

Resumo

The relative growth of the male chelipod and female abdomen of Armases angustipes (Dana, 1852) was studied in order to determine the carapace size of puberty. Also, the age of juvenile crabs in laboratory was established. A total of 537 males and 557 females were analysed and the transition point between mature and immature stages was determined for both sexes. Males attain maturity at 1.00 cm carapace width and females at 1.08 cm. The relative growth of female abdomen was more remarkable than that of the male chelipod, although both are positive allometric. It suggests a greater importance of a large abdomen in females than a strong chelipod in males. Juvenile crabs reared from megalopa stage has five developmental stages before reaching sexual differentiation. This occurs in the sixth juvenile stage, when the intermolt stages become longer. The potential equation between carapace width and accumulated duration of juvenile stages is described as CW = 0,047D0,508.

Armases angustipes; crabs; relative growth; age determination


Armases angustipes; crabs; relative growth; age determination

Crescimento relativo e determinação da idade na fase juvenil de Armases angustipes (Dana) (Decapoda, Brachyura, Grapsidae)1 1 Contribuigao numero 1121 do Departamento deZoologia, Universidade Federal do Paraná.

Relative growth and age determination of juvenile crab ofArmases angustipes (Dana) (Decapoda, Brachyura, Grapsidae)

Vania G.L. KowalczukI; Setuko MasunariII

IDepartamento de Biologia, Universidade Federal de Roraima. Campus do Paricarana, Rodovia BR 174, 69310-270 Boa Vista, Roraima, Brasil

IIDepartamento de Zoologia, Universidade Federal do Paraná. Caixa Postal 19020, 81531-990 Curitiba, Paraná, Brasil

ABSTRACT

The relative growth of the male chelipod and female abdomen of Armases angustipes (Dana, 1852) was studied in order to determine the carapace size of puberty. Also, the age of juvenile crabs in laboratory was established. A total of 537 males and 557 females were analysed and the transition point between mature and immature stages was determined for both sexes. Males attain maturity at 1.00 cm carapace width and females at 1.08 cm. The relative growth of female abdomen was more remarkable than that of the male chelipod, although both are positive allometric. It suggests a greater importance of a large abdomen in females than a strong chelipod in males. Juvenile crabs reared from megalopa stage has five developmental stages before reaching sexual differentiation. This occurs in the sixth juvenile stage, when the intermolt stages become longer. The potential equation between carapace width and accumulated duration of juvenile stages is described as CW = 0,047D0,508.

Key words:Armases angustipes, crabs, relative growth, age determination

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AGRADECIMENTOS. Ao Prof. Dr. Gustavo Augusto Schmidt de Melo, do Museu de Zologia da Universidade de São Paulo, pela identificação da espécie em estudo. Ao Prof. M.Sc. Paulo Pezzuto, da Fundação Universidade do Vale do Itajai (Itajai, Santa Catarina), pela concessão no uso do programa Regrans de sua autoria. Ao Conselho Nacional de Desenvolvimento Cientifico e Tecnológico (CNPq), que através do Curso de Pós-Graduação em Ciências Biológicas-Zoologia da Universidade Federal do Paraná concedeu uma bolsa de mestrado à primeira autora para o desenvolvimento do presente trabalho.

Recebido em 04.111.1999; aceito em 17.1.2000.

  • Fransozo, A. 1986. Desenvolvimento dos estágios juvenis de Sesarma (Holometopus) rectum Randall, 1840 (Decapoda, Grapsidae) obtidos em laboratório. Naturalia 11/12: 77-87.
  • Góes, J.M. de & A. Fransozo. 1997. Relative growth of Eriphia gonagra (Fabricius, 1781) (Crustácea, Decapoda, Xanthidae) in Ubatuba, State of São Paulo, Brazil. Nauplius 5 (2): 85-98.
  • Hartnoll, R.G. 1974. Variation in growth patterns between some secondary sexual characters in crabs (Decapoda: Brachyura). Crustaceana 27: 131-136.
  • ______. 1978. The determination of relative growth in Crustácea. Crustaceana 34 (3): 281-293.
  • ______. 1982. Growth, p. 111-196. In: L.G. ABELE (Ed). The Biology of Crustacea. 2. Embriology, morphology and genetics. New York, Academic Press New York, 440p.
  • ______. 1985. Growth, sexual maturity and reproductive output. Crustacean Issues 3: 101-128.
  • Kowalczuk, V.G.L. & S. Masunari. 2000. Estrutura populacional de Armases angustipes (Dana, 1852) (Decapoda, Brachyura, Grapsidae) da Ilha do Farol, Matinhos, Paraná. Revta bras. Zool. 17 (1): 1-16.
  • Masunari, S.; E. Oliveira & V.G.L. Kowalczuk. 1998. Crustácea Decapoda da praia rochosa da Ilha do Farol, Matinhos, Paraná. I. Distribuição temporal de densidade das populações. Revta bras. Zool. 15(1): 219-239.
  • Masunari, S. & J. Dubiaski-Silva. 1998. Crustácea Decapoda da praia rochosa da Ilha do Farol, Matinhos, Paraná. II. Distribuição espacial de densidade das populações. Revta bras. Zool. 15 (3): 643-664.
  • Melo, G.A.S.; V.G. Veloso & M.C. Oliveira. 1989. A fauna de Brachyura (Crustácea: Decapoda) do litoral do Estado do Paraná. Lista preliminar. Neritica 4 (1/2): 1-31.
  • Neoreiros-Fransozo, M.L. & A. Fransozo. 1991. Growth and age determination ofthreejuvenilecrab species (Crustácea, Decapoda, Brachyura). Pap. Avuls Zool., São Paulo, 37 (18): 277-283.
  • Pezzuto, P.R. 1993. Regrans: a "basic" program for an extensive analysis of relative growth. Atlântica 15: 93-105.
  • Pinheiro, M.A.A. & A. Fransozo. 1993. Relative growth of the speckled swimming crab Arenaeus cribarius (Lamarck, 1818) (Brachyura, Portunidae), near Ubatuba, State of São Paulo, Brazil. Crustaceana 65 (3): 377-388.
  • ______. 1998. Sexual maturity of the speckled swimming crab Arenaeus cribarius (Lamarck, 1818) (Decapoda, Brachyura, Portunidae), in the Ubatuba littoral, São Paulo State, Brazil. Crustaceana 71 (4): 434-452.
  • Vaninni, M. & F.Gerhardi. 1988. Studieson the pebblecrab, Eriphiasmithi Mac Leay 1838 (Xanthidae: Menippidae): pattern of relative growth and population structure. Trop. Zoology 1 (2): 203-216.
  • 1
    Contribuigao numero 1121 do Departamento deZoologia, Universidade Federal do Paraná.
  • Datas de Publicação

    • Publicação nesta coleção
      22 Maio 2009
    • Data do Fascículo
      Mar 2000

    Histórico

    • Recebido
      04 Mar 1999
    • Aceito
      17 Jan 2000
    Sociedade Brasileira de Zoologia Caixa Postal 19020, 81531-980 Curitiba PR Brasil, Tel./Fax: +55 41 3266-6823, - Curitiba - PR - Brazil
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