Effects of Feed Restriction on Fatty Acid Composition of Meat and Adipose Tissues in Pig.

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  • 飼料の制限が豚肉脂質および脂肪組織の脂肪酸組成に及ぼす影響
  • シリョウ ノ セイゲン ガ ブタニク シシツ オヨビ シボウ ソシキ ノ シボウサン ソセイ ニ オヨボス エイキョウ

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Abstract

In experiment 1, effects of feed restriction on fatty acid composition and cholesterol level of meat (loin) and adipose tissues (subcutaneous fat and intermuscular fat) were investigated using 18 Land-race x White Yorkshire x Duroc barrows. The animals were allocated into three groups receiving full feeding (control), 80% and 60% of full feeding, respectively. Samples of loin (m. longarisumus) were collected between 12th and 13th vertebrate 24 hours after slaughtering. There was no obvious effect of feed restriction on total lipids level in loin and the values were all similar among the groups. Proportions of palmitoleic and linoleic acids in total lipids in loin decreased with feed restriction although other fatty acids stayed at the same levels. While there was no large difference in loin neutral fatty acid composition among three groups, mrystic, palmitic, palmitoleic, linoleic acids, and degree of saturation in polar lipids, varied significantly (P<0.01) among the groups. Cholesterol levels tended to be lower with higher feed restrictions but no statistical significance was obtained. In experiment 2, loin, perirenal, subcutaneous and intermuscular fat taken from normal and soft fat barrows determined by palpation were subjected to fatty acid composition and cholesterol analyses. Loin samples of the soft fat pigs had a slightly lower total lipids level compared with those of the normal pigs but significantly higher (P<0.05) proportions of oleic and linoleic acids. This observation agrees with involvement of higher levels of oleic acid in occurrence of soft fat pigs. Compared with the normal pigs, the soft fat pigs had a largely lowered (P<0.01) cholesterol level.

Journal

  • Nihon Yoton Gakkaishi

    Nihon Yoton Gakkaishi 36 (4), 152-159, 1999

    The Japanese Society of Swine Science

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