Resumo
To provide better cond’tions for fish culture, a study was undertaken to assess the best way of adapting mullet fingerlings (Mugil curema) to jreshwater. Mullets have been submitted to direct shock and gradual decrease of salinities of 12‰, 7‰, 3‰ and 2‰ (freshwater), with a survival varying from 65% to 100%. It was observed that weight varies in function of time, at salinities of 0,2‰, 3‰ and 7‰, and that of the fish médium with values of 14‰ and 30‰ (winter and summer) at Tamandaré, and 18‰ and 31‰ (winter and summer) at Itamarac‡, located res-pectively at the south and north of the state of Pernambuco coast.
Estudo sobre aclimatação de alevinos de tainha (Mugil curema Valenciennes, 1836) à agua doce
George Nilson Mendes
Departamento de Psicologia e Biologia, Universidade Federal do Maranhão, São Luís, MA
ABSTRACT
To provide better condtions for fish culture, a study was undertaken to assess the best way of adapting mullet fingerlings (Mugil curema) to jreshwater. Mullets have been submitted to direct shock and gradual decrease of salinities of 12‰, 7‰, 3‰ and 2‰ (freshwater), with a survival varying from 65% to 100%. It was observed that weight varies in function of time, at salinities of 0,2‰, 3‰ and 7‰, and that of the fish médium with values of 14‰ and 30‰ (winter and summer) at Tamandaré, and 18‰ and 31‰ (winter and summer) at Itamarac, located res-pectively at the south and north of the state of Pernambuco coast.
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AGRADECIMENTOS
Ao Professor José Espinhara da Silva, pela orientação e apoio prestados para a realização desse trabalho.
A todo o pessoal que compõe a Base de Piscicultura de Itamaracá, Escola de Pesca de Tamandaré e Departamento de Pesca da Universidade Federal Rural de Pernambuco, que não mediram esforços para favorecer a execução do trabalho.
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- Hoar, W. S. & D. J. Randall, 1971. Salt Secretion. Fish Physiology 1: p. 257-267. London.
- Prosser, C. L. & F. A. Brown, Ir., 1968. Transiciones entre la vida de agua dulce, 29-32, in Fisiologia Comparada. Ed. Interamericano, México.
- Schmidt-Nielsen, K., 1972. Animais aquáticos. In: Fisiologia Animal: 60-65. Univ. São Paulo.
- Turner, C. D., 1970. Pars Intermedia: regulación cromatófora en los vertebrados. In: Endocrinologia General: 147-148.
Datas de Publicação
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Publicação nesta coleção
31 Ago 2009 -
Data do Fascículo
1983
