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慢慢但肯定地:大脑提高了灵长类动物的未成熟生存率
Zitan Song1, Carel P van Schaik1,2,3
1Comparative Socioecology Group, Department for the Ecology of Animal Societies, Max Planck Institute of Animal Behavior, Konstanz, Germany.
American journal of primatology
|August 30, 2025
概括
灵长类动物的大脑大小通过增加父母的投资和保护来提高后代的生存率. 这种关键的好处有助于年轻灵长类动物慢慢成熟,
科学领域:
- 进化生物学
- 比较心理学
- 行为生态学
背景情况:
- 大脑的高能量需求表明大脑的适应性.
- 哺乳动物数据显示,大脑增加了成年人的生存率,但延迟了繁殖并减少了生殖分配.
- 由于对后代的生存缺乏重视, 大脑大小的适应性益处可能被低估.
研究的目的:
- 研究大脑大小对灵长类动物未成熟生存的影响.
- 探索大脑大小,父母的投资和后代的生存之间的联系.
- 确定大脑大小增长的最强适应性好处.
主要方法:
- 对自然人口长期人口统计数据的分析.
- 包括18种不同灵长类动物的数据.
- 专注于第一年的生存率.
主要成果:
- 在灵长类动物中发现大脑大小与未成熟的存活率之间存在显著的正相关性.
- 这种对生存的积极影响从生命的第一年开始就显而易见.
- 拥有较大的大脑的物种表现出更高的后代存活率,这与父母更大的保护和供应有关.
结论:
- 灵长类动物的大脑大小增加给后代带来了显著的生存优势.
- 父母的投资,包括保护和储备,是推动这一生存利益的关键机制.
- 增强未成熟的生存可能是灵长类动物大脑大小的最大适应性优势.
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