Effects of quantitative feed restriction and sex on carcass traits,meat quality and meat lipid profile of Morada Nova lambs

作     者：Thiago L.A.C.de Araújo Elzania S.Pereira Ivone Y.Mizubuti Ana C.N.Campos Marília W.F.Pereira Eduardo L.Heinzen Hilton C.R.Magalhaes Leilson R.Bezerra Luciano P da Silva Ronaldo L.Oliveira 

作者机构：Department of Animal ScienceFederal University of CearaFortaleza 60356001CearaBrazil Department of Animal ScienceState University of LondrinaLondrina 86051990ParanáBrazil Laboratory of Sensory AnalysisAgency for Agricultural Research(EMBRAPA-Tropical Agroindustry)Fortaleza 60511110CearáBrazil Department of Animal ScienceCampus Professora Cinobelina ElvasFederal University of PiauíBom Jesus 64900000PiauiBrazil Department of Animal ScienceSchool of Veterinary Medicine and Animal Science/Federal University of BahiaSalvador CityBahia State 40.170-110Brazil 

出 版 物：《Journal of Animal Science and Biotechnology》 (畜牧与生物技术杂志（英文版）)

年 卷 期：2017年第8卷第4期

页      面：992-1003页

核心收录：

学科分类：0905[农学-畜牧学] 09[农学] 

基　　金：supported by the National Council for Scientific and Technological Development(CNPq-Brazil) 

主　　题：Dietary restriction Fatty acid Hair sheep Lean meat Semi-arid condition 

摘      要：Background: An experiment was conducted to evaluate the effects of feed restriction(FR) and sex on the quantitative and qualitative carcass traits of Morada Nova lambs. Thirty-five animals with an initial body weight of 14.5 ± 0.89 kg and age of 120 d were used in a completely randomized study with a 3 × 3 factorial scheme consisting of three sexes(11 entire males, 12 castrated males and 12 females) and three levels of feeding(ad libitum – AL and 30% and 60% FR).Results: Entire males presented greater hot and cold carcass weights(P 0.05) concentrations, and the concentrations of palmitic acid, palmitoleic acid, stearic acid, oleic acid and conjugated linoleic acid were higher(P 0.05) than those of animals with 60% FR. The meat of females had a higher ω6/ω3 ratio and lower h/H ratio, and females had greater levels of feeding. The meat of animals on the 60% FR diet had a greater ω6/ω3 ratio, lower h/H ratio and lower concentration of desirable fatty acids in addition to a greater atherogenicity index(AI) and thrombogenicity index(TI).Conclusion: Lambs of different sexes had carcasses with different quantitative traits without total influence on the chemical and physical meat characteristics. The lipid profile of the meat was less favorable to consumer health when the animals were female or submitted to 60% feed restriction.