母亲照顾导致长期,缓慢的生活进化
Matthew N Zipple1,2, H Kern Reeve1, Orca Jimmy Peniston3
1Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853.
概括
长期孕产妇护理的物种的生命历程变慢,寿命更长,繁殖频率更低. 这种母性投资塑造了哺乳动物生命策略的演变.
科学领域:
- 进化生物学是进化的生物学.
- 行为生态学 行为生态学
- 哺乳动物的生命史
背景情况:
- 哺乳动物种类表现出不同的"生活节奏",从快速 (短寿命,频繁繁殖) 到缓慢 (长寿命,不频繁繁殖).
- 后代对母亲护理的依赖程度有很大差异,从短暂的营养依赖到长期的营养后依赖.
研究的目的:
- 调查后代对母亲存在的依赖与生命史特征的演变之间的因果关系.
- 测试延长产妇护理驱动较慢生命史的演变的假设.
主要方法:
- 利用确定性建模来模拟人口动态.
- 采用基于随机代理的建模来探索进化轨迹.
- 在模型中整合了对母亲生存和后代健康的经验观测.
主要成果:
- 这两种建模方法都得出了相同的结论:母亲对后代的强烈生存影响,以及后代的生存率导致进化更长的寿命和降低的繁殖率.
- 证明了孕产妇护理的重要性与人口生活节奏之间的直接联系.
结论:
- 延长后代对母亲存在的依赖是缓慢生命史演变的关键驱动因素.
- 在人类,灵长类动物,鱼,子和大象中观察到的缓慢的生命历史很可能受到它们重要的孕产妇护理策略的影响.
- 开发的模型可以适应经验参数化,从而促进进一步的假设测试.
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