在Pongo abelii和Pongo pygmaeus中,脚踏和手动近端状曲
Joseph K Won1,2,3, Matthew W Tocheri4,5,6, Caley M Orr7,8
1PhD Program in Anthropology, Graduate Center of the City University of New York, New York, New York, USA.
American journal of biological anthropology
|November 24, 2025
概括
猩猩的状曲反映了它们的运动. 苏门答腊猩猩 (Pongo abelii),更为树木,有曲的脚骨 (pPP3),不同于婆罗洲猩猩 (Pongo pygmaeus).
科学领域:
- 灵长类的功能形态学
- 古人类学古人类学.
- 生物力学 生物力学
背景情况:
- 人类类的状曲与运动行为相关,较大的曲与树木现实有关.
- 之前的二维几何形态测量 (2DGM) 研究表明,在猩猩手动近道 (mPP3) 中.
- 婆罗洲猩猩 (Pongo pygmaeus) 的曲线mPP3比苏门答腊猩猩 (Pongo abelii) 的曲线要小.
研究的目的:
- 在猩猩中,将角曲的分析扩展到第三脚踏近位 (pPP3).
- 评估pPP3.3中是否存在与树木相关的曲率模式.
- 评估骨曲和庞戈的运动多样性之间的联系.
主要方法:
- 2D几何形态测量 (2DGM) 用于分析P. abelii和P. pygmaeus.中的ppp3曲率.
- 概括的Procrustes分析和主要组件分析使用100个地标量化了形状变化.
- 与现有的mPP3数据进行了比较,ANOVA和后期测试确定了意义.
主要成果:
- 主要组件1 (PC1) 解释了73.4%的形状变异,主要反映了背部植物曲.
- 比起P. pygmaeus,P. abelii的PPP3曲线明显大于P.
- 在每个物种中,脚踏近道 (pPP3) 的曲率比手动近道 (mPP3) 的曲率更大.
结论:
- 状曲反映了习惯性的基质使用,支持在较低的分类学水平的假设.
- 在P. abelii中,较大的PPP3曲率与其树木运动保持一致,而在P. pygmaeus中较小的曲率与增加的陆地性相关.
- 脚踏与手动的不同适应可能与基质参与有关,为已灭绝物种的位置行为重建提供信息.
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