The rate of senescence in maternal performance increases with early-life fecundity in red deer.
The rate of senescence in maternal performance increases with early-life fecundity in red deer.
复制标题
马鹿生命早期的繁殖力越高，母性衰老的速度就越快。
DOI：
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发表时间：
2006
期刊：
影响因子：
8.8
通讯作者：
T. Clutton‐Brock
中科院分区：
文献类型：
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作者：
D. Nussey;L. Kruuk;A. Donald;M. Fowlie;T. Clutton‐Brock
生殖和体细胞维持之间的权衡是长寿脊椎动物生殖衰老的一个经常引用的解释。个体之间的质量差异使得这种权衡难以检测，并且野生种群中存在的证据仍然很少。在这里，我们研究了自然种群中的红鹿（马鹿），使用混合模型框架来控制个体间方差的孕产妇繁殖性能的衰老率的影响因素。衰老开始于9岁的两个母亲的性能性状。在这两个特征中，早期生育更多后代的雌性衰老速度更快。这种权衡是显而易见的，同时显着影响个体质量的晚年育种性能。这些结果提出了罕见的证据，支持一次性索马和拮抗多效性理论的衰老从野生脊椎动物种群和突出的效用的混合模型测试理论的老化。
Tradeoffs between reproduction and somatic maintenance are a frequently cited explanation for reproductive senescence in long-lived vertebrates. Between-individual variation in quality makes such tradeoffs difficult to detect and evidence for their presence from wild populations remains scarce. Here, we examine the factors affecting rates of senescence in maternal breeding performance in a natural population of red deer (Cervus elaphus), using a mixed model framework to control for between-individual variance. Senescence began at 9 years of age in two maternal performance traits. In both traits, females that produced more offspring in early life had faster rates of senescence. This tradeoff is evident alongside significant effects of individual quality on late life breeding performance. These results present rare evidence in support of the disposable soma and antagonistic pleiotropy theories of senescence from a wild vertebrate population and highlight the utility of mixed models for testing theories of ageing.