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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Rev. Bras. Zool. vol.18 no.4 Curitiba Dec. 2001

https://doi.org/10.1590/S0101-81752001000400012 

Larvas de Scinax rizibilis (Bokermann) (Anura, Hylidae): avaliando o efeito parental

 

Tadpoles of Scinax rizibilis (Bokermann) (Anura, Hylidae): evaluating the paternal effects

 

 

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. E-mail: bastos@icb1.ufg.br
IIDepartamento de Zoologia, Instituto de Biociências, Universidade Estadual Paulista. Caixa Postal 199, 13506-900 Rio Claro, São Paulo, Brasil. E-mail: haddad@ms.rc.unesp.br

 

 


ABSTRACT

A controlled experiment, related with the mating system of Scinax rizibilis (Bokermann, 1964), was conducted to assess if larval variation could be due to size of male or its ability to manage an amplexus. Adult individuals were caught during breeding activity (from February 1993 to January 1994), in a temporary pond in the municipality of Ribeirão Branco. São Paulo State, southeastern Brazil. The duration of the larval period was not different between tadpoles of large and small males, nor was it different between tadpoles coming from natural or artificial pairs. The reproductive status of the male (if it had managed an amplexus) also did not influence the total length nor the mass of the tadpoles close to metamorphosis. However, tadpoles of larger and heavier males were, on average, approximately 5.5% and 11% larger and heavier, respectively, than tadpoles of smaller males. These results indicate that the breeding system of S. rizibilis could potentially have a directional effect on the larval characteristics.

Key words: Scinax rizibilis, mating system, larval characteristic


 

 

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Full text available only in PDF format.

 

 

AGRADECIMENTOS. Gostaríamos de agradecer a J.A.F. Diniz-Filho pela leitura crítica e sugestões apresentadas ao manuscrito. A J.P. Pombal Jr., E.C. P. Pombal, O.C. Oliveira, F. Baldisseri, pelo auxílio 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 D.V. Andrade e M.C. Crupi pela inestimável ajuda durante os experimentos. A FAPESP (proc. 92/0631-2, 94/5634-5 e 95/9269-2) pelo apoio financeiro. Ao CNPq pelas bolsas de produtividade em pesquisa. RPB agradece ao CNPq e CAPES pela bolsa durante o doutoramento na UNESP (campus de Rio Claro-SP).

 

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Recebido em 15.XII.2000; aceito em 22.X.2001.

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