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首页> 外文期刊>Tropical Animal Health and Production >Age- and sex-dependent regression models for predicting the live weight of West African Dwarf goat from body measurements
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Age- and sex-dependent regression models for predicting the live weight of West African Dwarf goat from body measurements

机译：年龄和性别相关的回归模型，可通过身体测量预测西非矮山羊的活体重

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摘要

The relationships between live weight and eight body measurements of West African Dwarf (WAD) goats were studied using 211 animals under farm condition. The animals were categorized based on age and sex. Data obtained on height at withers (HW), heart girth (HG), body length (BL), head length (HL), and length of hindquarter (LHQ) were fitted into simple linear, allometric, and multiple-regression models to predict live weight from the body measurements according to age group and sex. Results showed that live weight, HG, BL, LHQ, HL, and HW increased with the age of the animals. In multiple-regression model, HG and HL best fit the model for goat kids; HG, HW, and HL for goat aged 13-24months; while HG, LHQ, HW, and HL best fit the model for goats aged 25-36months. Coefficients of determination (R super(2)) values for linear and allometric models for predicting the live weight of WAD goat increased with age in all the body measurements, with HG being the most satisfactory single measurement in predicting the live weight of WAD goat. Sex had significant influence on the model with R super(2) values consistently higher in females except the models for LHQ and HW.
机译：在农场条件下，使用211只动物研究了西非矮山羊（WAD）的活重与8个身体测量值之间的关系。根据年龄和性别对动物进行分类。将关于肩高（HW），心围（HG），体长（BL），头长（HL）和后躯长度（LHQ）的数据拟合到简单的线性，等距和多元回归模型中以进行预测根据年龄段和性别，从身体测量的活体重。结果表明，活重，HG，BL，LHQ，HL和HW随着动物年龄的增长而增加。在多元回归模型中，HG和HL最适合山羊孩子的模型。 13至24个月大的山羊的HG，HW和HL;而HG，LHQ，HW和HL最适合25-36个月龄山羊的模型。在所有人体测量中，用于预测WAD山羊活重的线性和异速模型的确定系数（R super（2））值都随着年龄的增长而增加，其中HG是预测WAD山羊活重最满意的单一度量。性别对模型的影响很大，除LHQ和HW模型外，女性的R super（2）值始终较高。

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