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Biological aspects of Mithraculus forceps (Brachyura: Mithracidae) from Anchieta Island, Ubatuba, Brazil

Published online by Cambridge University Press:  12 August 2003

Fernando L.M. Mantelatto
Affiliation:
Departamento de Biologia, FFCLRP, Universidade de São Paulo (USP), Av. Bandeirantes, 3900, CEP 14040-901, Ribeirão Preto, São Paulo, Brazil
Fabiola C.R. Faria
Affiliation:
Departamento de Biologia, FFCLRP, Universidade de São Paulo (USP), Av. Bandeirantes, 3900, CEP 14040-901, Ribeirão Preto, São Paulo, Brazil
Renata B. Garcia
Affiliation:
Departamento de Biologia, FFCLRP, Universidade de São Paulo (USP), Av. Bandeirantes, 3900, CEP 14040-901, Ribeirão Preto, São Paulo, Brazil

Abstract

The population structure of Mithraculus forceps sampled monthly on Anchieta Island from January 1999 to December 2000 was studied. A total of 68 individuals were collected by SCUBA diving. The population presented normal and unimodal distribution, and the total sex ratio was 1·4:1·0 in favour of males. Ovigerous females were captured during all seasons. The pattern observed for the M. forceps population in Anchieta Island indicated the strategy favoured by environmental characteristics of the island and by coexistence with other decapod crustaceans in the studied area.

Type
Research Article
Copyright
2003 Marine Biological Association of the United Kingdom

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