Early life expenditure in sexual competition is associated with increased reproductive senescence in male red deer.
Early life expenditure in sexual competition is associated with increased reproductive senescence in male red deer.
复制标题
性竞争中生命早期的消耗与雄性马鹿生殖衰老的增加有关。
DOI：
10.1098/rspb.2014.0792
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Lemaître JF
中科院分区：
文献类型：
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作者：
Lemaître JF
衰老的进化理论预测，生命早期对繁殖的投资应该以减少体细胞维持为代价，从而导致更早或更快速的衰老。现在越来越多的人支持野生脊椎动物的这种权衡，但这些都完全来自雌性。在这里，我们使用 40 年实地研究收集的详细纵向数据在雄性马鹿 (Cervus elaphus) 中测试了这一预测。我们发现，拥有较大后宫并因此在成年早期分配更多资源用于繁殖的雄性在后宫规模和发情持续时间方面经历了更高的衰老率。早年拥有更多鹿角的雄性在以后的生活中并没有表现出更明显的生殖特征下降。总的来说，我们证明性竞争会影响野生马鹿种群的雄性生殖衰老，并为一夫多妻脊椎动物雄性的一次性体细胞衰老理论提供罕见的实证支持。
The evolutionary theories of senescence predict that investment in reproduction in early life should come at the cost of reduced somatic maintenance, and thus earlier or more rapid senescence. There is now growing support for such trade-offs in wild vertebrates, but these exclusively come from females. Here, we test this prediction in male red deer (Cervus elaphus) using detailed longitudinal data collected over a 40-year field study. We show that males which had larger harems and thereby allocated more resources to reproduction during early adulthood experienced higher rates of senescence in both harem size and rut duration. Males that carried antlers with more points during early life did not show more pronounced declines in reproductive traits in later life. Overall, we demonstrate that sexual competition shapes male reproductive senescence in wild red deer populations and provide rare empirical support for the disposable soma theory of ageing in males of polygynous vertebrate species.