鶏体内への脂肪酸蓄積に及ぼすマーガリン酸給与の影響

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タイトル別名
  • The Effect of Dietary Margaric Acid on the Retention of Several Fatty Acids in Chicks
  • ニワトリ タイナイ エ ノ シボウサン チクセキ ニ オヨボス マーガリンサン

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抄録

The objective of the present study was to determine the effect of dietary margaric acid on the retention of several fatty acids in the chick, especially margaric and heptadecenoic acids and endogenously synthesized fatty acids. Day-old White Leghorn male chicks were fed a commercial diet for 10 days and a fat-free diet for successive 8 days. The chicks were then divided into two groups. One was fed a diet containing 5% margaric acid for 10 days and the fat-free diet for successive 10 days. The other group was fed the fat-free diet during the experimental period. Intake and excretion of margaric acid and retention of several fatty acids were measured at a few days' interval. The chick growth and feed efficiency were not different between two groups. Excretion of margaric acid on the first day of margaric acid feeding was less than that on the second day or later. The chicks excreted margaric acid for more than 10 days even after margaric acid was removed from the diet, and the apparent absorbability of margaric acid was calculated as 20%. Retained C17 fatty acids in the liver and carcass increased with the margaric acid feeding, and decreased progressively after removal of this acid from the diet. The amount of C17 fatty acids retained in the carcass during 10 days of margaric acid feeding was about 27% of the absorbed margaric acid. From the result obtained in this experiment, it may be concluded that a part of margaric acid is absorbed from the intestinal tract of the chick and stored in the body as margaric and heptadecenoic acids, and moreover, that a part of C17 fatty acids once stored in the body is oxidized just like the endogenously synthesized fatty acids. Compared to the control, the margaric acid fed chicks showed a higher distribution value of the stearic acid and a lower distribution value of oleic acid in the liver when they were fed margaric acid for 10 days. This suggests that margaric acid feeding possibly affect the biosynthesis or desaturation of C13 fatty acids in the chick liver.

収録刊行物

  • 日本畜産学会報

    日本畜産学会報 46 (8), 487-492, 1975

    公益社団法人 日本畜産学会

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