ソウギョの必須脂肪酸

DOI 日本農学文献記事索引 Web Site 被引用文献6件
  • 竹内 俊郎
    東京水産大学資源育成学科
  • 渡邊 教美
    東京水産大学資源育成学科
  • 雍 文岳
    東京水産大学資源育成学科 Yangtse River Fisheries Institute, Chinese Academy of Fisheries Sciences
  • 渡邉 武
    東京水産大学資源育成学科

書誌事項

タイトル別名
  • Studies on nutritive value of dietary lipids in fish-XXXII. Essential fatty acids of grass carp Ctenopharyngodon idella.
  • ソウギョの必須脂肪酸〔英文〕
  • ソウギョ ノ ヒッス シボウサン エイブン

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抄録

Two feeding experiments were conducted to detect any essential fatty acids (EFA) deficiency and clarify EFA requirement of grass carp Ctenopharyngodon idella by feeding diets containing various fatty acids.<br> The fish fed diet without EFA (fat-free and 12:0 alone diets) showed high percentages of vertebral column curvature (VCC) which exhibited an upward displacement of the column at the region of the 12-15th vertebrae from the caudal end, indicating lordsis. At a 1% level of dietary n-6 or n-3 fatty acids, the diet containing 18:3n-3 performed better than that containing 18:2n-6. However, a higher percentage of the VCC was still observed in the fish fed the 1% 18:3n-3 diet, sug-gesting that 18:3n-3 inspite of its positive role on growth, could not prevent the occurrence of VCC. On the other hand, the addition of 1% 18:2n-6 to the diet completely prevented the appearance of the VCC. The highest weight gain and feed efficiency were observed in the fish fed the diet con-taining pollock liver oil plus corn oil or soybean oil mixture. Next in performance came the fish fed both 1% 18:2n-6 and 1% 18:2n-3 or 0.5% n-3HUFA diets. The ratios of 20:3n-9 to 22:6n-3 and 20:3n-9 to 20:4n-6 in polar lipid fractions of hepatopancreas showed less than 0.4 and 0.6 when fish fed the diet containing both 1% n-6 and 0.5 or 1% n-3 fatty acids.<br> This experiment clearly indicated that VCC is one of the EFA-deficiency symptoms, and also suggested that the requirement of grass carp for dietary n-6 and n-3 fatty acids is found to be 1% and 0.5-1%, respectively.

収録刊行物

  • 日本水産学会誌

    日本水産学会誌 57 (3), 467-473, 1991

    公益社団法人 日本水産学会

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