In Vivo Measurement of Body Fat and Body Water in Swine

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Abstract
The appln. and the accuracy of body water, body density and back fat thickness measurements on the live animal and carcass, for estimating the body fat content of swine were investigated. Body water measurements made in vivo on swine by the antipyrine method provide one of the newer and useful technics for determining body composition. The detn. of the body density of the eviscerated hog carcass and the measurement of the back fat thickness on the live animal or carcass were found to be closely correlated with the body water and body fat content and were established as useful indices in the appraisal of fatness. The uniform distribution of antipyrine in the hog occurs in about 1 hr. and the rate of transformation of the drug was, on the avg. 36%/hr. This antipyretic was metabolized faster in swine than cattle, slower than in dogs, and much faster than for human subjects, as reported by other investigators. Theoretical equations were developed as follows which permit the calculation of percentage of body water and/ or body fat from the body specific gravity of the eviscerated animal. [image].

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