マダイ稚魚用飼料の適正n-3高度不飽和酸含量

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タイトル別名
  • Suitable Levels of n-3 Highly Unsaturated Fatty Acids in Diet for Fingerlings of Red Sea Bream.
  • マダイ稚魚用飼料の適正n-3高度不飽和酸含量〔英文〕
  • マダイ チギョヨウ シリョウ ノ テキセイ n 3 コウド フホウワサン ガン

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This experiment was conducted to confirm the relationship between dietary lipid levels and n-3 highly unsaturated fatty acids (n-3HUFA) contents and to determine a suitable n-3HUFA content in diet for fingerlings of red sea bream by feeding them with various white fish meal-casein diets containing different amounts of lipid (5-20%) and n-3HUFA (1.2-4.2%) at a fixed protein level of 52%.<br> At a level of 10% lipid, growth was lowered as n-3HUFA content in the diet increased, and the lowest feed performances were obtained in fish fed on a diet containing 3.7% n-3HUFA. On the other hand, at 15% lipid, the growth and feed efficiency were not affected by elevation of die-tary n-3HUFA content, reaching a maximum at 3.7% n-3HUFA. Furthermore, at a level of 20% lipid, growth rate and feed efficiency were also improved as the n-3HUFA content increased, recording high in diets containing n-3HUFA above 3.7%. These results clearly indicated that the n-3HUFA content in diet should be increased in proportion to dietary lipid levels to obtain maxi-mum growth. Moreover, the best growth and feed efficiency were obtained in fish fed on a diet with 15% lipid when n-3HUFA was adjusted to the level mentioned above.<br> Thus, the growth of red sea bream fingerlings was found to be greatly influenced by dietary n-3HUFA levels, a suitable level being approximately 20% in dietary lipid regardless of lipid levels.

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  • 日本水産学会誌

    日本水産学会誌 58 (3), 509-514, 1992

    公益社団法人 日本水産学会

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