Saghi Davoud Ali, Shahdadi Ali Reza, Mokhtarpour Amir
Animal Science Research Department, Khorasan Razavi Agricultural and Natural Resources Research and Education Center, AREEO, Mashhad, Iran.
Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.
Trop Anim Health Prod. 2016 Aug;48(6):1269-76. doi: 10.1007/s11250-016-1087-5. Epub 2016 Jun 2.
This study was conducted to compare the carcass characteristics and quantity of carcass and non-carcass components of 2- and 3-year-old male camels fattened for either 3 or 6 months. Twelve 2-year-old camels with an average body live weight of 268.5 ± 21.4 kg and twelve 3-year-old camels with an average body live weight of 307.5 ± 29.9 kg were used in a completely randomized design with a 2 × 2 factorial arrangement. For carcass analysis, three camels from each group were selected and slaughtered. The results showed that camel age and fattening period had no significant effect on average daily gain (ADG). Older camels and a longer fattening period resulted in heavier hot and cold carcass weights. Three-year-old camels had a higher dressing percentage compared to 2-year-old camels, regardless of the period of fattening. Analysis of non-carcass components showed that the heaviest component was the hide and 2-year-old camels fattened for 90 days had the greatest weight of hide as percentage of cold carcass weight. Total muscle weight was greater for the 3-year-old camels compared to the 2-year-old ones, regardless of the fattening period, and camels fattened for 180 days had heavier weight than those fattened for 90 days, regardless of age at fattening. However, the greatest weight of total muscle was detected in camels at 2 years of age fattened for 180 days when it was expressed as percentage of carcass weight. The highest and the lowest total fat content as kilogram or as percentage of cold carcass was observed in 3-year-old camels fattened for 180 days and 2-year-old camels fattened for 180 days, respectively. Our results suggested that the best age for slaughtering is 2 years old with the fattening period of 180 days.
本研究旨在比较育肥3个月或6个月的2岁和3岁雄性骆驼的胴体特征以及胴体和非胴体成分的数量。采用完全随机设计，以2×2析因安排，使用了12头平均体重为268.5±21.4千克的2岁骆驼和12头平均体重为307.5±29.9千克的3岁骆驼。为进行胴体分析，从每组中挑选3头骆驼进行屠宰。结果表明，骆驼年龄和育肥期对平均日增重（ADG）没有显著影响。年龄较大的骆驼和较长的育肥期导致热胴体和冷胴体重更重。无论育肥期如何，3岁骆驼的屠宰率均高于2岁骆驼。对非胴体成分的分析表明，最重的成分是皮，育肥90天的2岁骆驼的皮重占冷胴体重的百分比最大。无论育肥期如何，3岁骆驼的总肌肉重量均大于2岁骆驼，且育肥180天的骆驼比育肥90天的骆驼体重更重，无论育肥时的年龄如何。然而，当以胴体重量的百分比表示时，育肥180天的2岁骆驼的总肌肉重量最大。分别在育肥180天的3岁骆驼和育肥180天的2岁骆驼中观察到最高和最低的总脂肪含量（以千克计或占冷胴体的百分比）。我们的结果表明，最佳屠宰年龄为2岁，育肥期为180天。
