Prediction of carcass tissue composition of F1 crossbred goats finished on native pasture

Abstract

The objective of this study was to estimate tissue composition of the carcass from physical composition of commercial cuts of F1 crossbred goats (Boer with females of non-defined racial standard) finished on native pasture with four levels of supplementation with concentrate (0.0; 0.5; 1.0 and 1.5% of BW in dry matter). It was used 24 non-castrated animals at initial body weight of 15.52 kg and at 120 days of age. The carcass was sectioned in the half, and from the lefthalf carcass, the following cuts were detached: leg, loin, ribs, shoulder and neck, which were dissected in muscle, bone and fat. Carcass weight and yield were predicted from the weight and yield of tissues in the commercial cuts by regression analysis. All the cuts can be used to predict muscle and fat weight in the carcass. For the muscle, the relationship was linear and positive in the cuts leg, ribs, shoulder and neck, and cubic in the loin; for all the cuts, fat kept a linear relationship with the carcass. Muscle and fat yield of all the commercial cuts showed a positive linear relationship with carcass yield, except for rib fat, for which a cubic relationship was found. Considering all the results obtained and using the relationship with the highest determination coefficient, the ribs were the cut that provided the best estimate of the carcass muscle and fat yields of F1 crossbred goats (Boer with females of non-defined racial standard) finished on native pasture.

Prediction of carcass tissue composition of goat kids of different breeds through meat cuts

“…Rib is considered the cut that best represents the carcass tissue composition. This result is in agreement with Silva et al (2011), who studied the prediction of tissue composition of crossbred F1 goat kids and obtained the highest correlation coefficients between rib and the muscle (r = 0.916), fat (r = 0.902) and bone (r = 0.766) tissues.…”

“…In a study on the prediction of tissue composition of F1 crossbred mixed-breed goats finished on native pasture, Silva et al (2011) observed that the leg muscle provided the best estimate for this tissue in the carcass due to its higher coefficient of determination (R2 = 0.95). The rib was characterized as a predictor of bone (R2 = 0.84) and fat (R2 = 0.90) tissues.…”

Carcass traits and meat quality of goats fed with cactus pear (Opuntia ficus-indica Mill) silage subjected to an intermittent water supply

“…The commercial value of the carcass, whether through carcass yield and/or the proportions of the cuts, is also linked to tissue composition, thus the dissection of the leg represents an estimate of measuring the tissue composition of the carcass, in which is sought a greater proportion of muscle, intermediate proportion of fat and less bone in carcasses [17][18][19] . In this way, diets with cactus pear silage and the different levels of intermittent water supply resulted in the constancy in the amount of muscle, fat, and bone in legs of goats.…”