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在灵长类动物中阴部交接融合的变化:对产科适应的影响
Nicole Torres-Tamayo1,2, Laura T Buck3, Eishi Hirasaki4
1Institute of Evolutionary Medicine, University of Zurich, Zurich, Switzerland.
American journal of biological anthropology
|February 6, 2025
概括
阴部交融融合在灵长类动物之间有所不同. 虽然并非总是与分娩有关,但人类和一些灵长类动物的未融合的阴部交接可能是出于产科原因而演变的.
科学领域:
- 灵长类动物解剖学 灵长类动物解剖学
- 进化生物学 进化生物学
- 古人类学古人类学.
背景情况:
- 人类未融合的阴部交融被认为是对大脑婴儿和双脚骨盆的产科适应.
- 这项研究研究了灵长类物种之间的阴部交接融合,以评估其作为产科适应的作用.
研究的目的:
- 为了评估成年灵长类动物的交融的程度.
- 为了确定开放的交合体是否是人类和其他灵长类动物的产科适应.
主要方法:
- 评估了来自67种非人类灵长类动物物种的718个个体的交合体融合.
- 研究了四种物种 (Galago moholi, Macaca mulatta, Microcebus murinus, Pan troglodytes) 根据年龄和性别的融合变异.
- 在中进行了详细的阴部变化后勤回归.
主要成果:
- 阴部融合在大多数灵长类动物中是常见的.
- 融合时间因性别和物种而异;在和黑猩猩中,雄性比雌性早,在老鼠中只有雄性,在加拉戈斯没有.
- 延迟或缺失的融合在女性中更为常见,但并非始终与紧张的头皮合有关.
结论:
- 虽然延迟的阴部融合表明产科适应,但这种联系在所有物种中并不确定.
- 其他分娩机制或非产科压力可能会影响交合体融合.
- 人类和一些灵长类动物中持续的未融合的阴部交融最好解释为由产科选择驱动的融合进化.
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