Speciation through sensory drive in cichlid fish
Speciation through sensory drive in cichlid fish
复制标题
DOI：
10.1038/nature07285
复制
发表时间：
2008-10-02
期刊：
影响因子：
64.8
通讯作者：
Okada, Norihiro
中科院分区：
文献类型：
--
作者：
Seehausen, Ole;Terai, Yohey;Okada, Norihiro
从理论上讲，对感觉系统的不同选择可以通过感觉驱动引起物种形成。然而，经验证据是罕见和不完整的。在这里，我们展示了感官驱动器内的慈鲷鱼岛屿种群物种形成。我们确定的生态和分子的慈鲷视觉系统的分歧进化的基础上，证明相关的分歧，男性着色和女性的喜好，并显示随后的分化在中性位点，表明生殖隔离。证据是复制在几对同域种群和物种。环境梯度斜率的变化解释了物种形成过程中的变化：除了最陡的梯度，物种形成发生在所有梯度上。这是迄今为止最完整的证明，证明了物种形成是通过感官驱动，而不是地理隔离。我们的研究结果也提供了一个机制的解释，在人为的富营养化维多利亚湖的慈鲷鱼物种多样性的崩溃。
Theoretically, divergent selection on sensory systems can cause speciation through sensory drive. However, empirical evidence is rare and incomplete. Here we demonstrate sensory drive speciation within island populations of cichlid fish. We identify the ecological and molecular basis of divergent evolution in the cichlid visual system, demonstrate associated divergence in male colouration and female preferences, and show subsequent differentiation at neutral loci, indicating reproductive isolation. Evidence is replicated in several pairs of sympatric populations and species. Variation in the slope of the environmental gradients explains variation in the progress towards speciation: speciation occurs on all but the steepest gradients. This is the most complete demonstration so far of speciation through sensory drive without geographical isolation. Our results also provide a mechanistic explanation for the collapse of cichlid fish species diversity during the anthropogenic eutrophication of Lake Victoria.