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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Rev. Bras. Zool. vol.19  supl.2 Curitiba Dec. 2002

http://dx.doi.org/10.1590/S0101-81752002000600017 

Partição ambiental de Potimirim glabra (Kingsley) e Potimirim potimirim (Müller) (Crustacea, Decapoda, Atyidae) no rio Sahy, Mangaratiba, Rio de Janeiro, Brasil

 

Environmental partition of Potimirim glabra (Kingsley) and Potimirim potimirim (Müller) (Crustacea, Decapoda, Atyidae) in Sahy River, Mangaratiba, Rio de Janeiro, Brazil

 

 

Giovana V. Lima; Lídia M. Y. Oshiro

Estação de Biologia Marinha, Universidade Federal Rural do Rio de Janeiro. Rua Sereder, Itacuruçá, 23860-000 Mangaratiba, Rio de Janeiro, Brasil. E-mail: oshiro@ufrrj.br

 

 


ABSTRACT

This work aims to determinate the spatial distribution of two sympatric freshwater shrimp species, Potimirim glabra (Kingsley, 1878) and Potimirim potimirim (Müller, 1881) in Sahy River, municipality of Mangaratiba. The populations were collected from September, 1997 to February, 1999. The animals were collected monthly by sieving the marginal vegetation, on rocky surface and among litter on river bottom. The animals were sorted sexed. Their carapace length measured and total length measured. A total of 4,889 animals were collected in Sahy River: 3,281 P. glabra and 1,608 P. potimirim. The spatial distribution of P. glabra and P. potimirim showed an environmental partition. Potimirim glabra occurred in abundance at the farthest stations from the beach, wilst and P. potimirim, at the nearest stations from the sea.

Key words: Potimirim glabra, Potimirim potimirim, spatial distribution, environmental partition


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

AGRADECIMENTOS. Aos doutores Marcelo Antônio Amaro Pinheiro (UNESP-Jaboticabal) e Lenício Gonçalves (UFRRJ) pelas sugestões durante a defesa da Dissertação apresentada ao Curso de Ciências Ambientais e Florestais, na UFRRJ. À Zootecnista Charlene M. Silveira, ao Sr. Casemiro A. Alves e, ao meu pai, Benedito Albernaz Lima, pelo auxílio nas coletas mensais.

 

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Recebido em 19.VIII.2002; aceito em 27.XI.2002.

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