Effect of Dietary Lipid Level on the Growth, Feed Efficiency and Body Composition of Young Puffer Fish, Takifugu rubripes

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  • Han Kyung-nam
    Fishery Research Laboratory, Faculty of Agriculture, Kyushu University
  • Furuichi Masayuki
    Fishery Research Laboratory, Faculty of Agriculture, Kyushu University

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  • 飼料脂質含量がトラフグの成長, 飼料効率および体成分に与える影響
  • シリョウ シシツ ガンリョウ ガ トラフグ ノ セイチョウ シリョウ コウリツ

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Abstract

The effects of dietary lipid level on growth, efficiency of feed utilization and body composition were studied for young puffer fish of average body weight 2.7g. The fish were fed diets with four dietary lipid levels ranging from 6 to 22% as a source of energy. The growth performance was examined in terms of weight gain, feed efficiency, protein efficiency ratio, body composition and so on, for 8-week feeding trials at 22.5-28.0'C. The average weight gain, feed efficiency and protein efficiency ratio tended to increase with increasing dietary lipid level, and the highest value was obtained in fish fed the diet containing lipid level of 22%. Proximate analysis of body composition showed that dorsal muscle was not affected by dietary lipid level. However, moisture and crude protein in the liver were negatively correlated and crude lipid was positively correlated to dietary lipid level. It could be concluded from this study that increased dietary lipid was effectively utilized by young puffer fish.

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