测试生命早期影响框架:发育约束和适应性反应假设无法解释野生雌性的生育结果
Stacy Rosenbaum1, Anup Malani2, Amanda J Lea3
1Department of Anthropology, University of Michigan, Ann Arbor, MI, USA.
Proceedings. Biological sciences
|July 1, 2025
概括
的早期生活条件并没有强烈支持发育约束或适应生育反应. 在发育过程中排名较低的婴儿略有增加了婴儿丧失的风险,但这些发现对于进化解释来说并不确切.
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
- 生殖策略 生殖策略
背景情况:
- 早期生活条件可以影响成年人的结果,有两个主要假设:发育约束 (DC) 和适应性反应 (AR).
- 发展限制表明,早期的逆境限制了最佳发展,造成了成本.
- 适应性反应假设在早期和成人环境不匹配时提出负面结果.
研究的目的:
- 用DC和AR假设的数学定义来测试发育环境对生育的长期影响.
- 评估生命早期的降雨量和统治地位是否预测成年后女性生育指标.
- 为了确定观察到的关系是否与DC和/或AR解释一致.
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成年女性生育能力的影响.
- 研究了发展和成年期环境条件之间的关系.
主要成果:
- 发育性降雨量和发育性和成人降雨量之间的差异并不能预测生育指标.
- 在发育过程中,低主导级别与增加的婴儿损失有限相关.
- 在发育和成年之间占主导地位的更大变化也在一定程度上预测了更高的婴儿丧失风险.
结论:
- 该研究发现没有令人信服的证据来支持发育约束或适应性反应假设对早期生命对生育能力的影响.
- 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早期生命对生殖成功的影响的进化基础.
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