TOXICITY OF PANAMANIAN POISON FROGS (DENDROBATES) - SOME BIOLOGICAL AND CHEMICAL ASPECTS
TOXICITY OF PANAMANIAN POISON FROGS (DENDROBATES) - SOME BIOLOGICAL AND CHEMICAL ASPECTS
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DOI：
10.1126/science.156.3777.970
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发表时间：
1967-01-01
期刊：
影响因子：
56.9
通讯作者：
MYERS, CW
中科院分区：
文献类型：
--
作者：
DALY, JW;MYERS, CW
一种小型的新热带青蛙，Dendrobates umilio，在颜色、毒性程度、大小和习性上经历了种群间的变化。身体颜色的差异包括从红色到蓝色的可见光谱，以及非彩色的黑色和白色。毒性程度有很大的差异，但这些差异与所谓的警示颜色无关。皮肤提取物产生两种有毒化合物，其特征是类固醇生物碱，分子式为C19H33NO2和C19H33NO3。种群间的快速分化进化可能是由于原始杂合性的隔离和机会限制，随后的选择作用于不同的和非常有限的等位基因混合。
A small Neotropical frog, Dendrobates pumilio, undergoes interpopulational variation in color, degree of toxicity, size, and habits. Differences in body coloration encompass the visible spectrum from red to blue, as well as achromatic black and white. There are wide variations in the degree of toxicity, but these variations are not correlated with supposed warning colors. Extracts of skin yield 2 toxic compounds characterized as steroidal alkaloids with molecular formulae C19H33NO2 and C19H33NO3. The rapid rate of divergent evolution among populations of this frog may result from isolation and chance restriction of original heterozygosity, with subsequent selection acting on different and greatly limited mixtures of alleles.