Pearson R A, Ouassat M
Centre for Tropical Veterinary Medicine, University of Edinburgh, Easter Bush, Roslin, Midlothian.
Vet Rec. 1996 Mar 9;138(10):229-33. doi: 10.1136/vr.138.10.229.
The age, sex, liveweight and body measurements (heart girth, umbilical girth, height, length from elbow to tuber ischii and circumference of the foreleg cannon bone) of 516 donkeys used to transport goods in Morocco were recorded. There were few donkeys over 12 years of age. For adult donkeys weighing from 74 to 252 kg, the best equation with only one variable for predicting liveweight was: liveweight (kg) = heart girth (cm)2.65/2188. The inclusion of two variables improved the prediction marginally, but the addition of further variables gave little further improvement. The best prediction equation for adult donkeys was: liveweight (kg) = (heart girth [cm]2.12 x length [cm]0.688)/380. For donkeys under three years of age, weighing from 52 to 128 kg, the best prediction equation was: liveweight (kg) = (umbilical girth [cm]1.41 x length [cm]1.09)/1000. Other liveweight prediction equations for donkeys and horses were tested on the data and tended to overestimate the weight of these working donkeys. A subjective method for assessing the body condition of the donkeys was developed, using a scale from 1 (emaciated) to 9 (obese).
记录了摩洛哥516头用于驮运货物的驴的年龄、性别、活重和身体测量数据（胸围、脐围、身高、肘至坐骨结节长度和前肢管骨周长）。12岁以上的驴很少。对于体重在74至252千克之间的成年驴，仅用一个变量预测活重的最佳方程为：活重（千克）=胸围（厘米）².⁶⁵/2188。纳入两个变量略微提高了预测准确性，但增加更多变量后提升不大。成年驴的最佳预测方程为：活重（千克）=（胸围[厘米]².¹²×体长[厘米]⁰.⁶⁸⁸）/380。对于3岁以下、体重在52至128千克之间的驴，最佳预测方程为：活重（千克）=（脐围[厘米]¹.⁴¹×体长[厘米]¹.⁰⁹）/1000。还在这些数据上测试了其他针对驴和马的活重预测方程，结果往往高估了这些役用驴的体重。开发了一种主观评估驴身体状况的方法，使用从1（消瘦）到9（肥胖）的量表。
