Factors influencing the composition of belly in pig carcass
2001
Pulkrabek, J. | Pavlik, J. | Smital, J. (Vyzkumny Ustav Zivocisne Vyroby, Prague-Uhrineves (Czech Republic)) | Cechova, M.
Data from dissections of 76 pig carcasses were used to determine the proportion and composition of belly. First the effect of gender (gilts vs. barrows) was evaluated. In further analysis the effects of slaughter weight and proportion of fat in carcasses were taken into consideration. In addition to common statistical methods, a least square means method was used when analyzing the effects of slaughter weight and fat proportion. To determine tendencies of changes, regression curves were estimated and regression equations were derived. The effect of sex gilts and barrows was reflected mostly in the composition of belly. In comparison with barrows, belly of gilts contained more lean (42.2 %), bone (0.3 %) and skin (0.4 %). It was balanced by lower content of fat (4.9 %). From the analysis of the effect of slaughter weight it can be deduced that the carcasses of pigs slaughtered at the weight of 100 kg contained 6.0 % less fat than the carcass of pigs slaughtered at 120 kg. The proportion of lean, bone and skin is increased by 3.7, 1.2 and 1.1 % resp. Extraordinary influence on the composition of belly was displayed when we focused on the fat proportion in the whole carcass. If the interval of lean proportion in pig carcasses 40.0-60.0 % is taken into consideration, the lean proportion in belly increases by 23.4 % and fat proportion is reduced by 29.0%. In addition, bone and skin proportions increase by 2.7 and 2.9 respectively.
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