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Estimation of carcass lipid deposition through incorporation of dietary margaric acid in chicks fed lard diet



Estimation of carcass lipid deposition through incorporation of dietary margaric acid in chicks fed lard diet



Japanese Journal of Zootechnical Science 51(3): 197-203



The effects of lard feeding on the carcass lipid deposition were investigated using margaric acid and lauric acid as indices of the fatty acid mobilization in 14 day old male chicks. Two experimental diets, glucose or lard diet, were supplemented with margaric acid and lauric acid and were kept isocaloric and isonitrogenous. Carcass lipid deposition was markedly elevated by feeding the lard-diet. The disappearance rates of deposited lauric acid and margaric acid from the carcass lipid were not affected by the lard-diet. The incorporation rate of margaric acid was increased by the lard-diet and this incorporation rate fairly corresponded to the rate of increase in carcass lipid deposition. The increased lipid deposition after feeding of lard is due to the increase in direct incorporation of dietary fatty acids. About 60% of carcass lipid was derived from the dietary fat in the chicks fed the lard diet (12% fat content) whereas .apprx. 90% of carcass lipid was de novo synthesized from non-fat precursors in the cicks fed the glucose-diet (2% fat content).

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Accession: 000881029

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