社交网络的缩小是由主动和被动效应解释的,而不是随着年龄的增长而增加野生的选择性
Baptiste Sadoughi1,2,3,4, Roger Mundry3,5,6, Oliver Schülke1,2,3
1Department of Behavioral Ecology, Georg-August-Universität Göttingen, Johann-Friedrich-Blumenbach Institute for Zoology and Anthropology, Kellnerweg 6, D-37077 Göttingen, Germany.
Proceedings. Biological sciences
|March 12, 2024
概括
老年雌性阿萨姆 (Macaca assamensis) 随着年龄的增长而减少社交网络规模,原因是活动减少,而不是孤独增加. 社会选择性保持稳定,表明独立的衰老轨迹.
科学领域:
- 灵长类的社会行为.
- 动物的衰老动物的衰老
- 行为生态学 行为生态学
背景情况:
- 社会衰老,以脱离和网络收窄为特征,在各种动物中观察到.
- 为了了解自然人口中的社会衰老,需要对掠食和死亡率进行研究.
- 纵向数据对于区分个体内的老龄化与人口层面的人口影响至关重要.
研究的目的:
- 在自然条件下调查野生阿萨姆 (Macaca assamensis) 的社会衰老模式.
- 测试解释与年龄相关的社会行为和网络结构变化的机制性假设.
- 用混合纵向和个人内部分析来评估社会衰老模式的一致性.
主要方法:
- 在泰国 (2013-2020年) 对61只野生成年雌性阿萨姆的纵向研究.
- 13,270小时的直接观察记录社会互动和行为.
- 分析社交网络的大小,独自度过的时间,活动水平和跨年龄组的伴侣选择性.
主要成果:
- 较老的雌性鼠表现出较小的社交网络,主要是由于减少了积极和被动的行为,而不是增加了孤独时间.
- 在个体内部的分析有力地证明了与年龄相关的行为下降,有助于网络变化.
- 社会选择性,即接近首选伴侣的倾向,在老年时保持不变,但没有加剧.
结论:
- 老龄化雌性的社会脱离是由行为变化驱动的,特别是活动减少.
- 在衰老过程中,社会选择性和社会脱离似乎遵循独立的轨迹.
- 研究结果提供了对自然动物群体社会衰老的驱动因素的见解,这些动物群体面临着生态压力.
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