4.5 Article

Repeated intraspecific divergence in life span and aging of African annual fishes along an aridity gradient

期刊

EVOLUTION
卷 71, 期 2, 页码 386-402

出版社

WILEY
DOI: 10.1111/evo.13127

关键词

Intraspecific variation; life span; neoplasia; pace-of-life syndrome; parallel evolution; reproductive senescence

资金

  1. Czech Science Foundation [13-05872S, 16-00291S]
  2. Operational Programme Prague-Competitiveness [CZ.2.16/3.1.00/22197]
  3. National Program of Sustainability [NPU I LO1215, MSMT-34870/2013]
  4. Scuola Normale Superiore [CELSNS2015]

向作者/读者索取更多资源

Life span and aging are substantially modified by natural selection. Across species, higher extrinsic (environmentally related) mortality (and hence shorter life expectancy) selects for the evolution of more rapid aging. However, among populations within species, high extrinsic mortality can lead to extended life span and slower aging as a consequence of condition-dependent survival. Using within-species contrasts of eight natural populations of Nothobranchius fishes in common garden experiments, we demonstrate that populations originating from dry regions (with short life expectancy) had shorter intrinsic life spans and a greater increase in mortality with age, more pronounced cellular and physiological deterioration (oxidative damage, tumor load), and a faster decline in fertility than populations from wetter regions. This parallel intraspecific divergence in life span and aging was not associated with divergence in early life history (rapid growth, maturation) or pace-of-life syndrome (high metabolic rates, active behavior). Variability across four study species suggests that a combination of different aging and life-history traits conformed with or contradicted the predictions for each species. These findings demonstrate that variation in life span and functional decline among natural populations are linked, genetically underpinned, and can evolve relatively rapidly.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据