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Biometry and body chemical eomfosition of some Japanese and Eufopean fish gpecles in culture
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Resumo(s)
The present study considers the relationship between total body weight and other body
parameters (length and condition factor), several physiological índices (hepatosomatic índex,
gonadosomatic índex, viscerosomatic índex, gut índex and visceral fat) and crude
composition (moisture, fat, protein and ash) in yellowtail {Seriola quinqueradiata),
amberjack {Seriola purpurascens\ red seabream {Pagrus major), seabream {Sparus aurata)
and seabass {Dicentrarchus labrax). The results showed that from the regression equations
determined, the weight or percentage of an organ or tissues can be estimated with a high
degree of accuracy from the simple knowledge ot body weight.
Relating the condition factor with body weight and the parameters with interest to the
aquaculturist (percentage of dressed weight, viscerosomatic index, proportion ot visceral tat
and of total body fat) in a 3D scatter plot, it was possible to observe how changes in
condition, induced by the rearing conditions. affect those parameters, and, consequently, the
production levei. The results showed that muscle is the principal site of fat stores in
yellowtail, while for seabass, víscera appears to be the principal site, due to the great
amount of fat deposited in the abdominal cavity. No conclusions could be made for the rest
of the species due to the lack of significant results.
Descrição
Dissertação de mest. em Aquacultura, Unidade de Ciências e Tecnologias dos Recursos Aquáticos, Univ. do Algarve, 1997
Palavras-chave
Aquacultura Piscicultura Crescimento