The strategic role of the tail in maintaining balance while carrying a load bipedally in wild capuchins (Sapajus libidinosus): a pilot study
The strategic role of the tail in maintaining balance while carrying a load bipedally in wild capuchins (Sapajus libidinosus): a pilot study
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野生卷尾猴（Sapajus libidinosus）双足负重时尾巴在保持平衡方面的战略作用：一项试点研究
DOI：
10.1007/s10329-015-0507-x
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发表时间：
2016
期刊：
影响因子：
1.7
通讯作者：
E. Visalberghi
中科院分区：
文献类型：
--
作者：
L. Massaro;F. Massa;K. Simpson;D. Fragaszy;E. Visalberghi
携带物体的能力被认为是一种重要的选择压力，有利于早期人类进化出两足运动。现存灵长类动物的类似行为研究很少，因为很少有灵长类动物习惯性地用两足携带物体。然而，野生胡须卷尾猴生活在Fazenda Boa Vista自发地和习惯性地通过两足行走运输石器，使我们能够研究广义灵长类动物在物体运输过程中的两足运动特征。在这项试点研究中，我们调查了机械方面的位置和速度的质量中心，躯干倾斜，前肢姿势，和扭矩的力量施加在每个解剖段在野生长须卷尾猴在运输的对象，特别注意尾巴和它的作用，在平衡身体。我们的研究结果表明，身体质量强烈地影响运输的姿势，卷尾猴能够以双足、双髋、双膝的姿势搬运重物，这要归功于它们可伸展的尾巴的“战略性”使用;事实上，如果没有这种解剖结构，它们只占身体质量的5%，它们将无法运输它们习惯携带的负荷。
The ability to carry objects has been considered an important selective pressure favoring the evolution of bipedal locomotion in early hominins. Comparable behaviors by extant primates have been studied very little, as few primates habitually carry objects bipedally. However, wild bearded capuchins living at Fazenda Boa Vista spontaneously and habitually transport stone tools by walking bipedally, allowing us to examine the characteristics of bipedal locomotion during object transport by a generalized primate. In this pilot study, we investigated the mechanical aspects of position and velocity of the center of mass, trunk inclination, and forelimb postures, and the torque of the forces applied on each anatomical segment in wild bearded capuchin monkeys during the transport of objects, with particular attention to the tail and its role in balancing the body. Our results indicate that body mass strongly affects the posture of transport and that capuchins are able to carry heavy loads bipedally with a bent-hip-bent-knee posture, thanks to the “strategic” use of their extendable tail; in fact, without this anatomical structure, constituting only 5 % of their body mass, they would be unable to transport the loads that they habitually carry.
DOI：
10.1016/j.cub.2011.12.029
发表时间：
2012-02-07
期刊：
Current biology : CB
影响因子：
--
作者：
Lau DT;Murray AW
通讯作者：
Murray AW