Cloete S W, Haughey K G
Elsenburg Agricultural Centre, Republic of South Africa.
J S Afr Vet Assoc. 1990 Jun;61(2):55-8.
Investigations into ovine pelvic size and its relationship to repetitive rearing failure require accurate estimation of pelvic dimensions in live animals. Radiographic pelvimetry was used to estimate pelvic dimensions of 84 Merino, 21 Dormer and 20 S A Mutton Merino ewes. Transverse diameter and conjugate diameter were estimated; the area of the pelvic inlet was defined as the product of transverse and conjugate diameters. Dissected measurements obtained from all ewes after slaughter were regressed on estimated dimensions to obtain prediction equations for the correction of radiographic estimates. Prediction equations for the estimation of dissected pelvic dimensions from radiographs were accurate (r greater than or equal to 0.87), irrespective of dimension estimated or breed. Derived equations for estimation of dissected pelvic dimensions for the 3 breeds were not statistically different. It was concluded that pelvic dimensions of ewes could accurately be predicted by radiographic pelvimetry.
对绵羊骨盆大小及其与反复饲养失败关系的研究需要准确估计活体动物的骨盆尺寸。采用X线骨盆测量法对84只美利奴羊、21只多默羊和20只南非肉用美利奴母羊的骨盆尺寸进行估计。估计了横径和共轭直径；骨盆入口面积定义为横径和共轭直径的乘积。对所有母羊屠宰后获得的解剖测量值与估计尺寸进行回归分析，以获得校正X线估计值的预测方程。无论估计尺寸或品种如何，根据X线片估计解剖骨盆尺寸的预测方程都很准确（r大于或等于0.87）。3个品种的解剖骨盆尺寸估计推导方程在统计学上无差异。得出结论，X线骨盆测量法可准确预测母羊的骨盆尺寸。
