Predição da composição física e química da carcaça por meio da perna em ovinos Santa Inês

Abstract

The objective of the present work was to evaluate whether the physical and chemical compositions of the leg cut can predict the physical and chemical compositions of the Santa Inês sheep carcass and generate simple linear equations for the prediction of these components in the carcass. 42 male Santa Inês lambs were used, un-castrated, with BW 19.48 kg ± 1.86 kg, and aged between 6 and 7 months, housed in individual pens provided with feeders and drinkers, and fed with a roughage:concentrate ratio of 50:50 in diet. After 14 days of adaptation of the animals to management and diet, four animals were slaughtered, and the others after 63 experimental days. Before slaughtering, all animals were weighed after fasting solids for 16 hours to obtain body weight at slaughter (SBW). After slaughter and obtaining the carcass, it was cooled to 4 ° C for 24 hours, for later obtaining the cold carcass weight (CCW). In a refrigerated environment, the carcasses were divided in the dorsal midline to obtain two half carcasses, sectioning the left half carcass in the meat cuts neck, palette, rib, saw, loin and leg that were weighed, placed in plastic bags, vacuum packed and frozen for further dissection, removed from the freezer and thawed in a refrigerator at 4 ° C. The dissection aimed to separate and quantify (g) the physical components of muscle, fat, bones and other tissues. The physical composition of the half carcass was obtained by adding the physical components of the leg and the rest of the carcass. The correlations between the physical and chemical components of the reconstituted carcass and the respective physical and chemical compositions of the leg were evaluated. The criteria adopted for the classification of the correlation coefficients (r) were strong (r> 70%), moderate (30% < r < 70) and weak <30%. The correlated data (P <0.05) were used to propose parameters of simple linear equations to predict the physical and chemical components of Santa Inês sheep carcass from these constituents in the leg section. There was a moderate to strong correlation between the tissue and chemical components of the cut leg and their respective components in the carcass. Simple linear equations were proposed to predict these components in the carcass. The physical and chemical composition of Santa Inês sheep carcass can be predicted by means of the physical and chemical composition of the leg.