Produção Nacional
Aspectos reprodutivos do caranguejo Aratus pisonii (H. Milne Edwards) (Crustácea, Decapoda, Grapsidae) do manguezal de Itacuruçá, Rio de Janeiro, Brasil
2002; Sociedade Brasileira de Zoologia; Volume: 19; Issue: suppl 2 Linguagem: Inglês
10.1590/s0101-81752002000600016
ISSN1806-969X
AutoresCristiane F. Nicolau, Lídia Miyako Yoshii Oshiro,
Tópico(s)Marine and fisheries research
ResumoReproducti ve aspects of crab Ara/us pisonii (H.Milne Edwards) (Crustacea, Decapoda, Grapsidae) in ltacuruçá' s mangrove.The objective Oflhis work has to get know ledge about lhe reproducti ve aspect of the tree crab A ra/u.ç pisonii (H.M i I ne Edwards, 1837).The sampling were made monthly from April, 2000 to April, 2001, in the Itacuruçá' s mangrove (22°54'S and 43°33'W), Rio de Janeiro.The crabs were collected handly , using an effort of 50 minutes with three collectors.In laboratory, the specimens were separated by sex and had measured the carapace width and lenght.The ovigerous females were separated and the mass of eggs was removed for a mensurament of size and count of eggs.Afterwards, the animais were conservad in 70% alcohol.A total of 783 individuais were caught among 59% males and 41 % females among these 8% were ovigerous.The ovigerous females were found almost during the whole year, except in the winter showing major plenty on February and March , demonstrating the reproductive period.The ovigerous females presented size between 14.0 and 23.6 mm of carapace width and the average fecundity estimated to the specie was 9081 ± 3684 eggs.The mean size ofthe eggs was 0.27 mm varied from 0.24 to 0.29 mm and the size at onset of egg production was verified from 13 .1 to 15 .0mm of the carapace width.
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