Sexual selection and temporal phenotypic variation in a damselfly population
Sexual selection and temporal phenotypic variation in a damselfly population
复制标题
豆娘种群的性选择和时间表型变异
DOI：
10.1111/j.1420-9101.2011.02284.x
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发表时间：
2011
影响因子：
2.1
通讯作者：
M. McPeek
中科院分区：
文献类型：
--
作者：
D. B. Steele;A. Siepielski;M. McPeek
选择中的时间变化可以由适应度表面或静态适应度表面周围的表型分布中的时间变化产生，或同时产生。在这里，我们使用内和代间采样的健身表面和表型分布超过2年的调查时间变化的原因，在身体大小的豆娘Enallagma aspersum的性选择的形式。 在一年内，当女性的平均体型与男性的平均体型相差很大时，男性的体型经历了定向选择。与此相反，当男性和女性的大小分布重叠，男性的身体大小经历稳定的选择时，身体大小的差异很大，但没有明显的选择时，身体大小的差异很小。选择形式的时间变化的原因只能通过解释适应度表面和表型分布的变化来推断。
Temporal variation in selection can be generated by temporal variation in either the fitness surface or phenotypic distributions around a static fitness surface, or both concurrently. Here, we use within‐ and between‐generation sampling of fitness surfaces and phenotypic distributions over 2 years to investigate the causes of temporal variation in the form of sexual selection on body size in the damselfly Enallagma aspersum. Within a year, when the average female body size differed substantially from the average male body size, male body size experienced directional selection. In contrast, when male and female size distributions overlapped, male body size experienced stabilizing selection when variances in body size were large, but no appreciable selection when the variances in body size were small. The causes of temporal variation in the form of selection can only be inferred by accounting for changes in both the fitness surface and changes in the distribution of phenotypes.