The contribution of fat mobilization to the regulation of fat deposition in growing Large White and Piétrain pigs

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Abstract
The contribution of fat mobilization to the regulation of fat deposition was investigated in intensively fed, rapidly growing pigs of the breeds Large White and Pietrain. The results indicate that no quantitative differences in fat mobilization parameters existed between the breeds. In both breeds the concentration of non-esterified fatty acids i n blood serum, measured 8h after a meal, was very low, and the fatty acid composition of the non-esterified fatty acids did not reflect the variation in fatty acid composition of the body fat that existed between groups of pigs within each breed. Additionally, the fraction of body fat that was mobilized per day was calculated to be zero for both breeds. It is concluded from these results that the observed differences in fat deposition between Large White (195g/day) and Pietrain (130g/day) were definitely not the consequence of fat mobilization.