Composição centesimal da carne de cordeiros Santa Inês puros e de seus mestiços com Texel abatidos com diferentes pesos

Abstract

RESUMO -Objetivou-se avaliar a composição centesimal da carne de cordeiros da raça Santa Inês (SI x SI) e de seus mestiços com Texel (T x SI), abatidos com diferentes pesos vivos. O músculo biceps femoris foi utilizado para as análises de umidade, de proteína bruta (PB), de extrato etéreo (EE) e de cinzas. O delineamento foi inteiramente casualizado, com 16 tratamentos, em esquema fatorial 2x2x4, com dois grupos genéticos, dois sexos (14 machos e 13 fêmeas em cada grupo) e quatro pesos de abate (15, 25, 35 Meat Centesimal Composition of Purebred Santa Ines Lambs and its Crosses with Texel, Slaughtered at Different WeightsABSTRACT -The objective of this study was to evaluate the meat centesimal composition of Santa Ines pure breed and Santa Ines vs Texel crossbreed lambs, slaughtered at different body weights. Thirteen males and fourteen females from both breeds were selected. The muscle biceps femoris was used to determine water, crude protein, crude extract and minerals contents. The experiment was arranged randomly, with 16 traits in a 2x2x4 factorial scheme with two genetic groups, two genders (14 males and 13 females in each group) and four slaughter weights (15, 25, 35 e 45 kg of body weight). Data was analyzed by Proc GLM of SAS program. It was observed that the water content decreased as the slaughter weight increased, ranging from 76.09 to 74.31%. The males had higher water content values when compared to the females. The crude protein showed a quadratic behaviour, ranging from 20.27 to 21.36%. As the slaughter weight increased, the value of crude extract content also increased, ranging from 0.95 to 3.78%. The SIxSI animals presented higher ether extract content. In both genetic groups, the males presented lower ether extract content. The minerals content decreased as the slaughter weight increased and the females presented higher values when compared to the males. It was concluded that, as slaughter weight increased, the ether extract content also increased, while water and minerals content decreased and the crude protein content showed a linear decrease. The meat of female lambs presented higher contents of ether extract and less water content when compared to the meat of male lambs. The SIxSI lambs presented higher ether extract content when compared to TxSI lambs.

Lipidic characterization of Santa Inês lamb shoulder

“…These values are high when compared to the results found by Bonagurio, Perez and Garcia (2001), who described mean values of 1.0 to 3.5 g.100 g -1 in lambs' muscles. However, it should be emphasized that in the present experiment, the contents were obtained from samples of the edible portion (muscle and fat) of the shoulder, instead of only one type of muscle.…”

Tissue composition of the leg and meat quality of sheep fed castor bean hulls in replacement of tifton hay

“…Russo et al (1999) showed that weight at slaughter influences the chemical composition of meat, as heavier sheep deposit more fat and, as a result, exhibit a lower amount of water and protein in their meat. Bonagurio et al (2004) examined the composition of pure Santa Ines sheep and their crossbreeds slaughtered at different weights and came to a similar conclusion: with an increase in slaughter weight, there is a decrease in the amount of moisture, which is associated with a tendency for the reduction in the amount of crude protein. However, this effect was not observed in this study, where it was found that variation in weight at slaughter did not influence the chemical composition of the meat.…”

Meat quality of lambs fed silk flower hay (Calotropis procera SW) in the diet

“…Therefore, higher SFH levels in the diet promote increase in the moisture content of meat (Bonagurio et al, 2004).…”