Resumo
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.
Potimirim glabra; Potimirim potimirim; spatial distribution; environmental partition
Potimirim glabra; Potimirim potimirim; spatial distribution; environmental partition
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
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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.
Recebido em 19.VIII.2002; aceito em 27.XI.2002.
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Datas de Publicação
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Publicação nesta coleção
03 Jun 2009 -
Data do Fascículo
Dez 2002
Histórico
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Aceito
27 Nov 2002 -
Recebido
19 Ago 2002
