Fuller Rebecca C
Department of Evolution, Ecology, and Behavior, University of Illinois, Champaign, Illinois, USA.
Mol Ecol. 2022 Mar;31(5):1333-1336. doi: 10.1111/mec.16376. Epub 2022 Feb 15.
The Trinidadian guppy, Poecilia reticulata, is a long-studied model for the evolution of trade-offs in male nuptial coloration as a function of female mating preferences vs. predation risk. Previous work suggests that female mating preferences favour the evolution of increased conspicuous male coloration in low predation populations. In contrast, high predation risk shifts the balance towards reduced conspicuous coloration. In a From the Cover article in this issue of Molecular Ecology, Yong, Croft, Troscianko, Ramnarine, and Wilson (2021) use visual detection models to estimate the "conspicuousness" of male colour patterns as seen by guppies and their predators. The study fails to find robust patterns of increased conspicuousness in low predation populations. Only one of eight measures of conspicuousness showed parallel changes between high and low predation regimes, forcing us to reconsider the validity and repeatability of this classic example of parallel evolution.
特立尼达孔雀鱼（Poecilia reticulata）是一个长期以来被研究的模型，用于研究雄性婚羽颜色权衡进化与雌性交配偏好和捕食风险之间的关系。先前的研究表明，在低捕食风险种群中，雌性交配偏好有利于雄性颜色更加鲜艳的进化。相反，高捕食风险会使平衡向减少鲜艳颜色的方向转移。在本期《分子生态学》的一篇封面文章中，Yong、Croft、Troscianko、Ramnarine和Wilson（2021年）使用视觉检测模型来估计孔雀鱼及其捕食者眼中雄性颜色模式的“显眼程度”。该研究未能在低捕食风险种群中发现显眼程度增加的有力模式。在八项显眼程度指标中，只有一项在高捕食风险和低捕食风险环境之间呈现出平行变化，这迫使我们重新审视这个平行进化经典例子的有效性和可重复性。
