RAPID POPULATION DIVERGENCE LINKED WITH CO‐VARIATION BETWEEN COLORATION AND SEXUAL DISPLAY IN STRAWBERRY POISON FROGS
RAPID POPULATION DIVERGENCE LINKED WITH CO‐VARIATION BETWEEN COLORATION AND SEXUAL DISPLAY IN STRAWBERRY POISON FROGS
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草莓毒蛙种群的快速分化与颜色和性表现之间的共同变异有关
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
A. Qvarnström
中科院分区：
文献类型：
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作者：
Andreas Rudh;B. Rogell;O. Håstad;A. Qvarnström
当性选择的特征与生态上重要的特征一起分化时，物种形成的可能性就会增加。根据性选择理论，夸张展示行为的进化是由交配成功率的提高驱动的，但受到自然选择的限制，例如通过捕食。然而，警示色（一种重要的生态性状）的进化可以缓解受捕食束缚的夸张展示行为的进化，从而导致种群间警示色和性展示行为的联合分化。为了验证这一观点，我们对118只来自草莓毒蛙（Dendrobates pumilio）遗传差异种群的雄性进行了性别展示，并对个体和原生背景之间的颜色对比进行了研究。我们的研究结果表明，种群的显著性水平预测了雄性的性展示行为。来自显眼种群的雄性使用更多暴露的呼叫地点。我们认为，警色的变化不仅可能迅速导致适应性差的杂种的交配后隔离，还可能通过交配行为的变化导致交配前隔离。
The likelihood of speciation is assumed to increase when sexually selected traits diverge together with ecologically important traits. According to sexual selection theory, the evolution of exaggerated display behavior is driven by increased mating success, but limited by natural selection, for example, through predation. However, the evolution of aposematic coloration (i.e., an ecologically important trait) could relieve the evolution of exaggerated display behavior from the bound of predation, resulting in joint divergence in aposematic coloration and sexual display behavior between populations. We tested this idea by examining conspicuousness, using color contrasts between individuals and their native backgrounds, and sexual display of 118 males from genetically diverged populations of the Strawberry poison frog, Dendrobates pumilio. Our results show that the level of conspicuousness of the population predicts the sexual display behavior of males. Males from conspicuous populations used more exposed calling sites. We argue that changes in aposematic coloration may rapidly cause not only postmating isolation due to poorly adapted hybrids, but also premating isolation through shifts in mating behaviors.