Rose M D
Am J Phys Anthropol. 1976 Mar;44(2):247-61. doi: 10.1002/ajpa.1330440207.
The bipedal behavior of a troop of olive baboons (Papio anubis) is described. Bipedalism is relatively rare but nevertheless occurs in a wide variety of situations, although bipedalism during feeding occurs much more frequently than in other situations. The incidence of bipedalism varies between different age-sex classes and between individuals within age-sex classes. This pattern of bipedalism occurred within an overall adaptive response, particularly in feeding behavior, which was similar to that of the gelada baboon (Theropithecus gelada). The data on bipedalism is used together with an existing model of early hominid differentiation based on T. gelada to indicate the types of bipedal behavior which might have occurred in early hominid small object feeders and to suggest how a bipedal pattern of this type might have served as a basis for the action of selection for a more committedly bipedal pattern at later stages of hominid evolution.
本文描述了一群东非狒狒（Papio anubis）的两足行为。两足行为相对罕见，但在各种情况下都会出现，尽管进食时的两足行为比其他情况下更为频繁。两足行为的发生率在不同年龄 - 性别类别之间以及年龄 - 性别类别内的个体之间有所不同。这种两足行为模式出现在整体适应性反应中，特别是在进食行为方面，这与狮尾狒狒（Theropithecus gelada）的情况相似。关于两足行为的数据与基于狮尾狒狒的早期人类分化现有模型一起使用，以表明早期人类小型物体进食者可能出现的两足行为类型，并提出这种类型的两足模式如何可能作为在人类进化后期选择更坚定两足模式的作用基础。
