Reproductive benefits associated with dispersal in headwater populations of Trinidadian guppies ( Poecilia reticulata )
Reproductive benefits associated with dispersal in headwater populations of Trinidadian guppies ( Poecilia reticulata )
复制标题
与特立尼达孔雀鱼（Poecilia reticulata）源头种群扩散相关的生殖益处
DOI：
10.1111/ele.13929
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发表时间：
2021
期刊：
影响因子：
8.8
通讯作者：
Grether, ed., Greg
中科院分区：
文献类型：
--
作者：
Borges, Isabela L.;Dangerfield, Jillian C.;Angeloni, Lisa M.;Funk, W. Chris;Fitzpatrick, Sarah W.;Grether, ed., Greg
理论表明，扩散的进化是平衡的，其健身成本和收益，但经验证据是稀疏的，由于测量扩散和健身在自然种群的困难。在这里，我们使用空间上明确的数据，从多代捕获标记再捕获研究的两个人口的特立尼达孔雀鱼（孔雀鱼）沿着与谱系，以测试是否有健身效益与传播。结合这些生态和分子数据集，使我们能够直接测量运动和繁殖之间的关系。个体扩散被测量为鱼在其一生中移动的总距离。我们分析了扩散倾向和距离对各种生殖指标的影响。我们发现，配偶数量和后代数量呈正相关的扩散，特别是男性。我们的研究结果还揭示了个人和环境的变化，在扩散，性别，大小，季节和流作为决定因素。
Theory suggests that the evolution of dispersal is balanced by its fitness costs and benefits, yet empirical evidence is sparse due to the difficulties of measuring dispersal and fitness in natural populations. Here, we use spatially explicit data from a multi‐generational capture–mark–recapture study of two populations of Trinidadian guppies (Poecilia reticulata) along with pedigrees to test whether there are fitness benefits correlated with dispersal. Combining these ecological and molecular data sets allows us to directly measure the relationship between movement and reproduction. Individual dispersal was measured as the total distance moved by a fish during its lifetime. We analysed the effects of dispersal propensity and distance on a variety of reproductive metrics. We found that number of mates and number of offspring were positively correlated to dispersal, especially for males. Our results also reveal individual and environmental variation in dispersal, with sex, size, season, and stream acting as determining factors.