Forelimb Suspensory Gait Characteristics of Wild Lagothrix poeppigii and Ateles belzebuth : Developing Video-based Methodologies in Free-ranging Primates
Forelimb Suspensory Gait Characteristics of Wild Lagothrix poeppigii and Ateles belzebuth : Developing Video-based Methodologies in Free-ranging Primates
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野生 Lagothrix poeppigii 和 Ateles belzebuth 的前肢悬吊步态特征：在自由放养的灵长类动物中开发基于视频的方法
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发表时间：
2011
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通讯作者：
D. Guillot
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作者：
D. Guillot
种间运动性能差异的理解已经大大扩大了基于视频的，在圈养进行运动学分析。然而，这些技术很少被应用到研究自由放养的主题，因为他们谈判的挑战，他们的自然栖息地。在这项研究中，无限制运动的野生兔和Ateles belzebuth拍摄从树冠水平平台的高度，这些物种习惯旅行和饲料。我用这些视频数据来评估Ateles和Lagothrix在野外执行前肢悬挂行为的能力。我分析了时间步态参数和其他几个描述性参数相结合，认为反映分类差异的悬挂能力，并将结果与以前收集的运动学数据在圈养的努力，以解决两个问题：1）圈养和野生受试者之间的结果相似，如果不是，2）如何在野外前肢悬挂的性能不同？在一般情况下，时间步态参数来自视频的野生科目的方向相当，但不是幅度，以前报道的圈养科目的显着结果。在这两种环境中，Ateles的悬浮行为往往涉及更长、更少频率的步幅。相反，圈养的数据，野生动物的结果表明，Ateles表现出显着较长的无手阶段相对于步幅持续时间。数据还表明，步幅的不对称性和多样性的手持pendulum模式是特别重要的野生科目，可能反映了一个重要的行为反应的异质性，他们的树栖环境。报道的种间差异的性能变量可能反映了不同的能力，有效地应对挑战的柔顺和不可靠的支持使用前肢悬挂。
The understanding of interspecific locomotor performance differences has been greatly expanded by video-based, kinematic analyses conducted in captivity. However, these techniques have rarely been applied to the study of free-ranging subjects as they negotiate the challenges of their natural habitat. In this study, the unrestricted movements of wild Lagothrix poeppigii and Ateles belzebuth were filmed from canopy level platforms at heights where these species habitually travel and feed. I used these video data to evaluate the capacity for Ateles and Lagothrix to perform forelimb suspensory behaviors in the wild. I analyzed a combination of temporal gait parameters and several other descriptive parameters thought to reflect categorical differences in suspensory ability and compared the results to kinematic data previously collected in captivity in an effort to address two questions: 1) Are the results between captive and wild subjects similar and, if not, 2) how does the performance of forelimb suspension differ in the wild? In general, temporal gait parameters derived from videos of wild subjects are comparable in direction, though not magnitude, to significant results previously reported for captive subjects. In both environments, suspensory behaviors of Ateles tend to involve longer, less frequent strides. In contrast to captive data, results from wild subjects indicate that Ateles exhibits a significantly longer no-hands phase relative to stride duration. Data also suggest that stride asymmetry and diversity in handhold patterns are particularly important to wild subjects, likely reflecting an important behavioral response to the heterogeneous nature of their arboreal environment. Reported interspecific differences in performance variables likely reflect differing capacities to respond efficiently to the challenges of pliant and unreliable supports using forelimb suspension.