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Revista Brasileira de Zoologia

versão impressa ISSN 0101-8175

Rev. Bras. Zool. vol.16 no.2 Curitiba jun. 1999

https://doi.org/10.1590/S0101-81751999000200007 

Atividade reprodutiva de Scinax rizibilis (Bokermann) (Anura, Hylidae) na Floresta Atlântica, sudeste do Brasil

 

Breeding activity of the treefrog Scinax rizibilis (Bokermann) (Anura, Hylidae) in the Atlantic Forest, Southeastern, Brazil

 

 

Rogério P. BastosI; Célio F. B. HaddadII

IDepartamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Goiás. Caixa Postal 131, 74001-970 Goiânia, Goiás, Brasil
IIDepartamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista. Caixa Postal 199, 13506-900 Rio Claro, São Paulo, Brasil

 

 


ABSTRACT

The breeding activity of Scinax rizibilis (Bokermann, 1964) was observed in a temporary pond, in the municipality of Ribeirão Branco, in the Southern São Paulo State from February 1993 to January 1994 and November 1994 to February 1995. The reproductive season extended from September to February. Females were larger and heavier (after oviposition) than males. In the choras, the spatial distribution tended towards uniformity. The number of males and females in the chorus was positively correlated. However there was no correlation between the number of males and the estimation of the operational sex ratios. On average there were seven males for each female present in the chorus. The males were apparently selected by females.

Key words: Hylidae, Scinax rizibilis, reproduction, sexual selection, spatial distribution, seasonality


 

 

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AGRADECIMENTOS. Agradecemos a J.A.F. Diniz-Filho, J.P. Pombal Jr. e L.M. Bini pela leitura e sugestões apresentadas ao manuscrito. A J.P. Pombal Jr., E.C.P. Pombal, O.C. Oliveira, F. Baldissera pela ajuda nos trabalhos de campo. A A.T.d'Heursel pela ajuda na confecção do "abstract". Aos Srs Newton e Nilson Mattedi pela permissão de acesso ao local de estudos. A FAPESP (proc. 92/0631-2, 94/5634-5 e 95/9269-2) pelo suporte financeiro. Ao CNPq e CAPES (PICD) pelas bolsas concedidas.

 

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Recebido em 17.X.1997; aceito em 25.III.1999.

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