ORIGINAL PAPER
 
KEYWORDS
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ABSTRACT
The objective of this study was to evaluate the relationship between body mass index corrected (BMIc) for empty body weight and chemical components in hair sheep lambs. Thirty-eight weaned Pelibuey lambs (21 males and 17 females, with an average weight of 10.64 ± 2.46 kg) were used. The carcass was dissected into muscle and fat and ground together. The viscera and blood were mixed, ground, and one sample was collected from each animal. Crude protein and fat were determined in carcass and viscera samples. Correlation and regression were used to estimate the relationships between body composition and BMI. The correlation between BMIc and carcass crude protein (CCP) and visceral crude protein (VCP) was 0.80 and 0.50, respectively (P < 0.0001). BMIc showed a correlation of 0.71 and 0.70 with carcass fat (CF) and visceral fat (VF), respectively (P < 0.0001). The R2 values ranged from 0.52 to 0.97 for equations involving BMIc and body chemical composition. For carcass chemical components, CCP, CF and CE (carcass energy) with BMIc and R2 ranged from 0.64 (RSD: 0.10 kg) for CCP, 0.53 (RSD: 0.16 kg) for CF to 0.62 (RSD: 7.98) for CE. Visceral composition and BMIc had R2 values ranging from 0.96 for VCP (RSD: 0.05 kg), 0.52 for VF (RSD: 0.09 kg) to 0.55 (RSD: 4.34 kg) for VE (visceral energy). BMIc can be used to moderately predict body chemical composition in weaned Pelibuey lambs.
ACKNOWLEDGEMENTS
The authors want to thank Dr. Jose Manuel Piña Gutiérrez who provided the facilities of Rancho “El Rodeo”. The study was co-funded by the research grant under the Programa de Fomento a la Investigación, as part of the project “Eficiencia energética madre/cría en ovinos de pelo” We also thank CONACYT-MEXICO for granting a scholarship to Salazar-Cuytún E. R. to pursue his doctoral studies at the Universidad Autonoma de Yucatán, Mexico.
CONFLICT OF INTEREST
The Authors declare that there is not conflict of interest.
METADATA IN OTHER LANGUAGES:
Chinese
基于体重指数的毛用羔羊体成分预测
摘要: 本研究的目的是评价毛用羔羊体质指数 (BMI) 与空腹体重 (BMIC) 和化学成分的关系。试验选用断奶佩 利布埃羔羊38只 (公羔21只,母羔17只,平均体重10.64 ± 2.46 kg) 作为研究对象。将每只动物的胴体分离出肌 肉和脂肪并将二者研磨在一起,将内脏和血液混合研磨。测定胴体和内脏样品的粗蛋白质和粗脂肪。采用 相关分析和回归分析评价身体组成与BMI之间的关系。BMIc与胴体粗蛋白 (Carcass crude protein,CCP) 和内脏 粗蛋白 (Visceral crude protein,VCP) 的相关性分别为0.80和0.50 (P < 0.0001)。BMIc与胴体脂肪 (Carcass fat,CF) 和 内脏脂肪 (Visceral fat,VF) 的相关性分别为0.71和0.70 (P < 0.0001)。BMIC与机体化学成分的r2值在0.52 ~ 0.97之 间。胴体化学成分中,BMIC与CCP、CF和CE的r2范围分别为:CCP:0.64 (RSD:0.10 kg)、CF:0.53 (RSD:0.16 kg)、CE:0.62 (RSD:7.98)。内脏成分和BMIc的r2值为VCP:0.96 (RSD:0.05 kg)、VF:0.52 (RSD:0.09 kg) 、VE:0.55 (RSD: 4.34 kg)。结果显示,BMIc可适度预测佩利布埃羔羊断奶羔羊机体化学成分。
 
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