Abstract
On a group of 36 market weight pigs, correlations between live animal backfat probes, carcass backfat measurements, weight of chemical fat in the backfat trim of the shoulder and loin, total chemical fat in the loin, shoulder and in the half carcass were studied. Correlations between external fat measurements and total fat in the carcass and cuts were significant but low. In general, these relationships were much higher in barrows than in gilts. The correlations between external fat measurements and the fat in the trimmed carcass, the internal fat in the loin and the kidney fat were not significant. In the sample of pigs under study, backfat measurements on the live animal and on the carcass were useful in predicting the chemical fat in the backfat trim, but, because of the magnitude of the correlations, were of limited value as indicators of total chemical fat in the carcass and cuts and of little use in predicting internal fat. As in most studies with pigs the carcasses from gilts were leaner than those from barrows. This was evident not only in the live animal backfat measurements, but this tendency was also reflected in the chemical composition of the carcass, the shoulder and the loin.
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