Parallel shifts of visual sensitivity and body coloration in replicate populations of extremophile fish
Parallel shifts of visual sensitivity and body coloration in replicate populations of extremophile fish
复制标题
极端微生物鱼复制群体中视觉敏感性和身体颜色的平行变化
DOI：
10.1111/mec.16279
复制
发表时间：
2021
影响因子：
4.9
通讯作者：
Rennison, Diana J.
中科院分区：
文献类型：
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作者：
Owens, Gregory L.;Veen, Thor;Moxley, Dylan R.;Arias‐Rodriguez, Lenin;Tobler, Michael;Rennison, Diana J.
视觉敏感度和身体色素沉着通常是由环境中的自然选择和配偶选择中的性选择共同决定的。量化环境影响的一种方法是测量新栖息地殖民后特征发生了怎样的变化。为此，我们研究了反复适应极端硫酸盐(含H_2S)环境的墨西哥水仙种群。我们使用视蛋白基因表达和身体色素沉着来测量四个独立排水系统中的人群的视觉敏感度。在硫化物人群中，视觉敏感度和身体色素沉着都显示出向更高的中波长敏感度和反射率的显著平行转变。总而言之，我们发现硫化物栖息地选择的是视觉敏感度和色素沉着的差异。栖息地之间的变化可能是由于水的光谱特性的差异和相关的生态变化。
Visual sensitivity and body pigmentation are often shaped by both natural selection from the environment and sexual selection from mate choice. One way of quantifying the impact of the environment is by measuring how traits have changed after colonization of a novel habitat. To do this, we studiedPoecilia mexicanapopulations that have repeatedly adapted to extreme sulphidic (H2S‐containing) environments. We measured visual sensitivity using opsin gene expression, as well as body pigmentation, for populations in four independent drainages. Both visual sensitivity and body pigmentation showed significant parallel shifts towards greater medium‐wavelength sensitivity and reflectance in sulphidic populations. Altogether we found that sulphidic habitats select for differences in visual sensitivity and pigmentation. Shifts between habitats may be due to both differences in the water's spectral properties and correlated ecological changes.