The fast-slow continuum in mammalian life history: An empirical reevaluation
The fast-slow continuum in mammalian life history: An empirical reevaluation
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DOI：
10.1086/516847
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发表时间：
2007-06-01
影响因子：
2.9
通讯作者：
Purvis, A.
中科院分区：
文献类型：
--
作者：
Bielby, J.;Mace, G. M.;Purvis, A.
即使体型差异得到控制，许多生活史特征在不同物种之间也会存在共同变化。这种现象催生了“快-慢连续体”的概念，该概念对生命史进化的实证研究和理论研究都有影响。我们对哺乳动物生命史进行了比较分析，表明至少对于哺乳动物来说，不存在单一的快慢连续体。相反，在哺乳动物进化枝之间和内部，当消除体型影响时，生命速度至少沿着两个基本上独立的轴变化。一个轴反映了物种如何平衡后代大小与后代数量，而另一个轴则描述了繁殖发作的时间。
Many life-history traits co-vary across species, even when body size differences are controlled for. This phenomenon has led to the concept of a "fast-slow continuum," which has been influential in both empirical and theoretical studies of life-history evolution. We present a comparative analysis of mammalian life histories showing that, for mammals at least, there is not a single fast-slow continuum. Rather, both across and within mammalian clades, the speed of life varies along at least two largely independent axes when body size effects are removed. One axis reflects how species balance offspring size against offspring number, while the other describes the timing of reproductive bouts.