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

Revista Brasileira de Zootecnia

Rayana De Medeiros Silva²  José Morais Pereira Filho²  Aderbal Marcos De Azevêdo Silva²  Marcílio Fontes Cezar²  Anderson Luiz Nascimento Da Silva²  Ariosvaldo Nunes De Medeiros¹ 

[1] ,Universidade Federal de Campina Grande Programa de Pós-graduação em Zootecnia Patos PB ,Brazil

关键词: bone;    dissection;    fat;    muscle yield;    physical composition;    composição física;    dissecação;    gordura;    osso;    rendimento de músculo;   

DOI  :  10.1590/S1516-35982011000100026

来源: SciELO

【 摘 要 】

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.

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