对生命早期影响的测试框架:发育约束和适应性反应假设无法解释野生雌性的关键生育结果
Stacy Rosenbaum1, Anup Malani2, Amanda J Lea3
1Department of Anthropology, University of Michigan.
bioRxiv : the preprint server for biology
|May 7, 2024
概括
的早期生活逆境并没有强烈支持发育约束或适应性反应理论. 发育过程中的低等级与婴儿损失有微不足道的联系,但这些进化解释的证据仍然不确.
科学领域:
- 进化生态学的进化生态学
- 行为生态学 行为生态学
- 灵长类的繁殖策略
背景情况:
- 早期生活条件可以影响成年人的结果,主要有两个解释:发育约束 (DC) 和适应性反应 (AR).
- DC建议,早期的逆境限制了最佳发展,导致后来的成本.
- 根据AR的假设,早期和成人环境之间的不良匹配导致了更糟糕的结果.
研究的目的:
- 用DC和AR假设的数学定义来测试发育环境对雌性的生育能力的长期影响.
- 评估早期生活中的降雨量和支配地位是否预测成人生育率的指标.
- 为了确定观察到的关系是否与DC和/或AR预测一致.
主要方法:
- 利用二次回归方法来分析野生的数据.
- 评估了发育性降雨量和主导地位对三个女性生育率指标的影响.
- 检查了环境匹配/不匹配 (降雨量,排名) 和生育结果之间的关系.
主要成果:
- 发育性降雨量,或发育性和成人降雨量之间的差异,并不能预测生育率.
- 在发育过程中,低主导级别与增加婴儿丧失风险的边缘关联.
- 在发育和成年之间排名的更大变化也显示出与婴儿损失的边际联系.
结论:
- 该研究没有发现对发展约束或适应性反应假设的有力的支持,以解释早期对生育能力的影响.
- 对婴儿死亡的统治地位排名观察到的边际影响与其他解释相一致,例如成人环境质量.
- 需要进一步的研究才能充分理解这种物种早期生命效应的进化基础.
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