.png){kind=icon}
返回
We age because we grow
.png){kind=icon}
OA
AI
DOI：10.1098/rspb.2008.1831.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Why do we age? Since ageing is a near-universal feature of complex organisms, a convincing theory must provide a robust evolutionary explanation for its ubiquity. This theory should be compatible with the physiological evidence that ageing is largely due to deterioration, which is, in principle, reversible through repair. Moreover, this theory should also explain why natural selection has favoured organisms that first improve with age (mortality rates decrease) and then deteriorate with age (mortality rates rise). We present a candidate for such a theory of life history, applied initially to a species with determinate growth. The model features both the quantity and the quality of somatic capital, where it is optimal to initially build up quantity, but to allow quality to deteriorate. The main theoretical result of the paper is that a life history where mortality decreases early in life and then increases late in life is evolutionarily optimal. In order to apply the model to humans, in particular, we include a budget constraint to allow intergenerational transfers. The resultant theory then accounts for all our basic demographic characteristics, including menopause with extended survival after reproduction has ceased.
Keyword:
aging
evolution
hunter-gatherers
life history
disposable soma
somatic capital
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
P
IF:
3.5
论文数:
1.5W
被引数:
5.7W
机构
引用论文
The evolution of human life expectancy and intelligence in hunter-gatherer economies.png)
AMERICAN ECONOMIC REVIEWOAAI
AMERICAN ECONOMIC REVIEWIF11.6
OAAI分享收藏Possibility of Cofiring a Nickel Inner Electrode in a (Na0.5K0.5)NbO3–LiF Piezoelectric Actuator
PREAI
分享收藏
查看更多内容