Reproductive benefits associated with dispersal in headwater populations of Trinidadian guppies (Poecilia reticulata),Ecology Letters

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Reproductive benefits associated with dispersal in headwater populations of Trinidadian guppies (Poecilia reticulata)
Ecology Letters ( IF 7.6 ) Pub Date : 2021-11-25 , DOI: 10.1111/ele.13929
Isabela L Borges _{1,

2,

3} , Jillian C Dangerfield ₄ , Lisa M Angeloni _{5,

6} , W Chris Funk _{5,

6} , Sarah W Fitzpatrick _{1,

2,

3}

Affiliation

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.

中文翻译：

与特立尼达孔雀鱼（Poecilia reticulata）上游种群扩散相关的生殖益处

理论表明，散布的演变与其适应度成本和收益相平衡，但由于难以测量自然种群的散布和适应度，经验证据很少。在这里，我们使用来自两个特立尼达孔雀鱼种群（ Poecilia reticulata）的多代捕获-标记-再捕获研究的空间显式数据) 以及谱系来测试是否存在与分散相关的健康益处。结合这些生态和分子数据集，我们可以直接测量运动和繁殖之间的关系。个体扩散被测量为一条鱼在其一生中移动的总距离。我们分析了分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与分散呈正相关，尤其是雄性。我们的研究结果还揭示了个体和环境在扩散方面的差异，其中性别、大小、季节和河流是决定因素。

更新日期：2021-11-25

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