Evolution of sexual dichromatism in relation to nesting habits in European passerines: a test of Wallace’s hypothesis
Evolution of sexual dichromatism in relation to nesting habits in European passerines: a test of Wallace’s hypothesis
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与欧洲雀形目鸟类筑巢习惯相关的性二色进化：华莱士假设的检验
DOI：
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发表时间：
2012
影响因子：
2.1
通讯作者：
Juan Moreno
中科院分区：
文献类型：
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作者：
Juan José Soler;Juan Moreno
华莱士在1868年提出，自然选择而不是性选择可以解释鸟类羽毛二色性的显著差异。因此，他预测，筑巢习惯，通过它们与巢捕食的联系，可以通过使腔巢中的雌性变得和雄性一样显眼来驱动性二色性的变化，而达尔文（1871年，《人类的起源和与性别有关的选择》，约翰·默里，伦敦）认为性选择是对二色性的唯一解释。性二色性目前被用来表示性选择的强度，因此测试华莱士的说法与现代遗传学控制的方法是比较自然和性选择的作用，影响鸟类颜色的演变的主要兴趣。在这里，我们有巢出席，性二色性和筑巢习惯（开放和腔巢），以男性和女性的羽毛显着性在欧洲雀的相关信息。巢孵化出席并不能解释男性或女性的羽毛显着，但巢型。此外，虽然单色和腔巢物种的女性比其他物种的女性更明显，单色和开放巢物种的男性是那些更神秘的羽毛。最后，性格演变的分析表明，筑巢习惯的变化影响的概率，在两个二色性和羽毛显着的男性，但不显着影响女性的变化。这些结果强烈建议的作用，筑巢习惯在进化中的羽毛显着的男性，和性别选择的作用，也在女性，这两个因素影响性二色性的演变。达尔文和华莱士在世纪前就自然选择和性选择在推动鸟类羽毛显著性和性二色性进化中的重要性进行了辩论，我们讨论了我们的研究结果，并得出结论，我们的研究结果部分支持了两位杰出科学家所设想的进化情景。
Wallace proposed in 1868 that natural rather than sexual selection could explain the striking differences in avian plumage dichromatism. Thus, he predicted that nesting habits, through their association with nest predation, could drive changes in sexual dichromatism by enabling females in cavity nesters to become as conspicuous as males, whereas Darwin (1871, The Descent of Man and Selection in Relation to Sex, John Murray, London) argued that sexual selection was the sole explanation for dichromatism. Sexual dichromatism is currently used as indicating the strength of sexual selection, and therefore testing Wallace’s claim with modern phylogentically controlled methodologies is of prime interest for comparing the roles of natural and sexual selection in affecting the evolution of avian coloration. Here, we have related information on nest attendance, sexual dichromatism and nesting habits (open and cavity nesting) to male and female plumage conspicuousness in European passerines. Nest incubation attendance does not explain male or female plumage conspicuousness but nest type does. Moreover, although females of monochromatic and cavity nesting species are more conspicuous than females of other species, males of monochromatic and open nesting species are those with more cryptic plumage. Finally, analyses of character evolution suggest that changes in nesting habits influence the probability of changes in both dichromatism and plumage conspicuousness of males but do not significantly affect those in females. These results strongly suggest a role of nesting habits in the evolution of plumage conspicuousness of males, and a role for sexual selection also in females, both factors affecting the evolution of sexual dichromatism. We discuss our findings in relation to the debate that Darwin and Wallace maintained more than one century ago on the importance of natural and sexual selection in driving the evolution of plumage conspicuousness and sexual dichromatism in birds, and conclude that our results partly support the evolutionary scenarios envisaged by both extraordinary scientists.