Loss of conspicuous coloration has co-evolved with decreased body size in populations of poison dart frogs
Loss of conspicuous coloration has co-evolved with decreased body size in populations of poison dart frogs
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箭毒蛙种群的显着颜色丧失与体型缩小共同进化
DOI：
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发表时间：
2013
影响因子：
1.9
通讯作者：
Andreas Rudh
中科院分区：
文献类型：
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作者：
Andreas Rudh
已知较大的信号大小有助于捕食者对警告信号的学习过程。此外，较小的物体通常比大的物体更难被发现，这表明与隐藏相比，较小尺寸的猎物不太可能从警戒策略中受益。然而，在自然种群中，身体大小的变化是否与隐藏和警戒之间的变化一致，仍然在很大程度上未被探索。我测试了身体大小是否在视觉上明显的人口比在神秘的人口最近分化的种群草莓毒蛙，Oophaga pumilio。通过分析光谱反射率和身体大小的数据，从18个离散的人口，我发现一个较大的平均身体大小显着的人口，这是证实了一个子集的12个人口占系统发育史的分析。这表明，明显颜色的丧失可能与身体尺寸的减少共同进化。因此，对身体大小的选择可能会影响警戒和隐蔽之间的进化转变，反之亦然。
Larger signal size is known to facilitate the learning process of predators to warning signals. Further, smaller objects are generally harder to detect than large, which suggests that smaller sized prey are less likely to benefit from an aposematic strategy compared to crypsis. However, whether body size changes in concert with shifts between crypsis and aposematism in natural populations, remains largely unexplored. I tested whether body size was larger in visually conspicuous population than in cryptic populations among recently diverged populations of the Strawberry Poison frog, Oophaga pumilio. By analysing spectral reflectance and body size data from individuals from 18 discrete populations I found a larger mean body size in conspicuous populations, which was confirmed by an analysis of a subset of 12 populations accounting for phylogenetic history. This shows that the loss of conspicuous colour likely co-evolved repeatedly with a decrease in body size. Thus, selection on body size may influence evolutionary shifts between aposematism and crypsis and vice versa.