瘦肌量,而不是攻击性,在野生雄性黑猩猩中介于主导地位和丸激素之间的联系
Jacob D Negrey1,2,3, Tobias Deschner4, Kevin E Langergraber1,5
1School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, U.S.A.
Animal behaviour
|July 24, 2023
概括
雄性黑猩猩的较高丸激素与更高的社会地位和肌肉质量相关,而不是增加侵略性. 水平将主导地位与肌肉质量联系起来,这表明其他因素也会影响侵略性.
科学领域:
- 灵长类动物学 灵长类动物学
- 行为生态学 行为生态学
- 内分泌学 在内分泌学.
背景情况:
- 与许多雄性哺乳动物的交配力度和侵略性有关.
- 在多种群体中,丸激素被假设为介导社会地位和交配成功之间的关系.
- 以前对雄性黑猩猩 (Pan troglodytes) 的研究表明,主导地位与丸激素之间存在联系,但丸激素在侵略中的作用的直接证据有限.
研究的目的:
- 研究野生雄性黑猩猩的支配地位,水平,侵略性和瘦肌量之间的关系.
- 为了确定侵略性或瘦肌量是否调解了丸激素和主导地位之间的联系.
- 为了澄清丸激素在雄性黑猩猩的社会和行为生态中的作用.
主要方法:
- 从一大群野生雄性黑猩猩收集了尿样.
- 测量尿的丸激素和肌素 (作为瘦肌肉质量的代理).
- 量化了集团内部侵略率和分析了统治地位的排名.
- 采用多变量和调解分析来评估变量之间的关系.
主要成果:
- 统治地位与侵略率,水平和肌素水平有积极的关联.
- 水平与肌水平有积极的关联,但与侵略率有负面的关联.
- 调解分析显示,水平促进了主导地位和肌水平之间的关联.
结论:
- 成年雄性黑猩猩的平均较高的丸激素水平与更高的支配地位和更大的肌肉质量有关,但不一定具有更高的攻击性.
- 瘦肌量,而不是攻击性,似乎在雄性黑猩猩中将主导地位和丸激素水平联系起来.
- 仅仅攻击率不足以解释支配地位和丸激素之间的关系;其他社会因素可能起着调节作用.
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