Sellers W I
Department of Human Anatomy and Cell Biology, University of Liverpool, UK.
Folia Primatol (Basel). 1996;67(1):1-14. doi: 10.1159/000157202.
Unlike all other primates, members of the subfamily Lorisinae are never seen to leap. To investigate the anatomical specializations that are behind the absence of leaping in their locomotor repertoire, a predictive mechanical model of leaping was developed using the lesser bushbaby, Galago moholi, as a size-matched leaping prosimian comparison. This enabled the required limb movements for a leaping slender loris to be calculated, and hence the torque and power requirements at each of the hindlimb joints. From this information, the maximum feasible leap was calculated for the slender loris morphotype; and it was found that this alone would prevent the animal from leaping a greater distance than it could walk over, so that the reduction in fitness due to an apparent loss of leaping from the behavioural repertoire can be considered to be very small.
与所有其他灵长类动物不同，懒猴亚科的成员从未被观察到会跳跃。为了探究其运动行为中缺乏跳跃行为背后的解剖学特化，研究人员以倭丛猴（Galago moholi）作为体型匹配的跳跃原猴类对照，构建了一个跳跃的预测力学模型。这使得能够计算出瘦猴跳跃所需的肢体运动，进而得出后肢各关节处的扭矩和功率需求。根据这些信息，计算出了瘦猴形态型的最大可行跳跃距离；结果发现，仅这一点就会使该动物无法跳跃比其步行更远的距离，因此，从行为模式中明显缺失跳跃行为所导致的适应性降低可被认为是非常小的。
