CORRELATED EVOLUTION OF CONSPICUOUS COLORATION AND BODY SIZE IN POISON FROGS (DENDROBATIDAE)
CORRELATED EVOLUTION OF CONSPICUOUS COLORATION AND BODY SIZE IN POISON FROGS (DENDROBATIDAE)
复制标题
毒蛙（石斛科）显着颜色和体型的相关进化
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
A. Forsman
中科院分区：
文献类型：
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作者：
M. Hagman;A. Forsman
摘要显眼的颜色通常与化学防御结合使用，以阻止捕食者的攻击。实验研究表明，明显的猎物颜色的回避诱导效果增加的图案元素的大小和增加的身体大小。在这里，我们使用一种比较的方法来测试这些发现的预测，即显着的颜色将与身体大小一起进化。在我们的分析中，我们使用以前发表的线粒体DNA为基础的基因组学和独立对比的比较分析，以检查是否进化的颜色模式的变化已与进化的变化，在警戒毒蛙（无尾目：Dendrobatidae）的身体大小。从文献中获得了关于身体大小（吻部到排气口的长度）和颜色的信息。研究人员使用了两种不同的方法来衡量显著性，一种是基于人类观察者的排名，另一种是基于计算机对数字化照片的分析。比较分析的结果表明，避免诱导着色和身体的大小已经演变在演唱会中的毒蛙。从重建的字符变化的结果进一步表明，相关的进化的大小和颜色的系统发育树中的每个不同的分支内的两个方向的变化。这一发现是一致的假设，即视觉引导的捕食者施加的选择，促进了进化的更大的身体大小的物种与显着的色彩，或增强进化显着的色彩在较大的物种。
Abstract Conspicuous coloration is often used in combination with chemical defenses to deter predators from attacking. Experimental studies have shown that the avoidance inducing effect of conspicuous prey coloration increases with increasing size of pattern elements and with increasing body size. Here we use a comparative approach to test the prediction from these findings, namely that conspicuous coloration will evolve in tandem with body size. In our analysis, we use a previously published mitochondrial DNA-based phylogeny and comparative analysis of independent contrasts to examine if evolutionary shifts in color pattern have been associated with evolutionary changes in body size in aposematic poison frogs (Anura: Dendrobatidae). Information on body size (snout to vent length) and coloration were obtained from the literature. Two different measures of conspicuousness were used, one based on rankings by human observers and the other based on computer analysis of digitized photographs. The results from comparative analyses using either measure of coloration indicated that avoidance inducing coloration and body size have evolved in concert in poison frogs. Results from reconstruction of character change further indicate that the correlated evolution of size and coloration has involved changes in both directions within each of the different clades of the phylogenetic tree. This finding is consistent with the hypothesis that selection imposed by visually guided predators has promoted the evolution of larger body size in species with conspicuous coloration, or enhanced evolution of conspicuous coloration in larger species.