Territorial males do not discriminate between local and novel plumage phenotypes in a tropical songbird species complex: implications for the role of social selection in trait evolution
Territorial males do not discriminate between local and novel plumage phenotypes in a tropical songbird species complex: implications for the role of social selection in trait evolution
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领地雄性不会区分热带鸣禽物种复合体中的本地羽毛表型和新羽毛表型：对社会选择在性状进化中的作用的影响
DOI：
10.1007/s00265-021-02976-8
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发表时间：
2021
影响因子：
2.3
通讯作者：
C. Cadena
中科院分区：
文献类型：
--
作者：
J. Avendaño;C. Cadena
动物交流中的新特征是否受到社会选择的青睐取决于接受者如何回应。如果在不同的地方出现不同的特征，或者相同的特征被不同地感知，那么即使在相似的环境中，种群也可能分化。对新特征与熟悉特征的携带者的攻击性提供了关于雄性-雄性竞争如何驱动表型进化的信息，但很少有研究测试过信号特征在人群社会选择中的功能。我们评估的作用，一个黑色的胸带在领土的竞争中的两个异域种新热带雀形目鸟类属Arremon无论是有或没有这种羽毛特征。现场实验，动物标本的坐骑和播放同种歌曲显示，这两个物种的男性同样具有侵略性的表型轴承或缺乏胸带。虽然需要评估的生理和社会成本轴承替代性状和评估女性的喜好，以进一步研究社会和性机制的羽毛和地理变异的演变中的作用，我们的研究结果表明，社会选择通过男性-男性的相互作用是一个不太可能的驱动程序的Arremon种群之间的表型分化。通过对资源的性内竞争的社会选择可能会驱动动物的表型分化和种群分化，但很少有研究通过研究在雄性-雄性竞争的背景下如何感知地理上不同的替代性状来测试这一假设的预测。我们评估了两种新热带区鸣禽的领土男性动物标本坐骑有或没有一个黑色的胸带，一个地理上可变的羽毛特征的行为反应。不管他们自己的表型，男性的两个物种同样具有侵略性的潜在入侵者轴承或缺乏胸带。与工作表明男性-男性的相互作用可能介导性状进化相反，我们的研究结果表明，在这个系统中的胸肌带是不太可能的目标，通过比赛中，男性竞争的领土，社会选择，并要求研究评估长期成本轴承替代性状或女性选择的选择力驱动表型进化。
Whether novel traits involved in animal communication are favored or not by social selection depends on how receivers respond to them. If alternative traits arise at different locations or the same traits are perceived differently, then populations may diverge even when occupying similar environments. Aggressiveness towards bearers of novel versus familiar traits is informative about how male-male competition may drive phenotypic evolution, yet few studies have tested the function of signaling traits in social selection across populations. We assessed the role of a black pectoral band during territorial contests in two allopatric species of Neotropical passerine birds in the genus Arremon either having or lacking this plumage trait. Field experiments using taxidermic mounts and playback of conspecific songs revealed that males of both species were equally aggressive towards phenotypes bearing or lacking a pectoral band. Although evaluating physiological and social costs of bearing alternative traits and assessing female preferences is required to further examine the roles of social and sexual mechanisms in the evolution of plumage and geographic variation, our results indicate that social selection via male-male interactions is an unlikely driver of phenotypic divergence among populations of Arremon. Social selection via intrasexual competition for resources may drive phenotypic divergence and population differentation in animals, but few studies have tested predictions of this hypothesis by examining how alternative traits varying geographically are perceived in contexts of male-male competition. We assessed the behavioral response of territorial males in two species of Neotropical songbirds to taxidermic mounts having or lacking a black pectoral band, a geographically variable plumage trait. Irrespective of their own phenotype, males of both species were similarly aggressive to potential intruders bearing or lacking the pectoral band. In contrast with work suggesting male-male interactions may mediate trait evolution, our results indicate that pectoral bands in this system are unlikely targets of social selection via contests in which males compete for territories, and call for studies assessing long-term costs of bearing alternative traits or female choice as selective forces driving phenotypic evolution.
影响因子：
9.8
作者：
Ligon RA;Diaz CD;Morano JL;Troscianko J;Stevens M;Moskeland A;Laman TG;Scholes E 3rd
通讯作者：
Scholes E 3rd
动物歌舞编排：蒙特祖玛奥彭多拉 (Psarocolius montezuma) 的案例研究
影响因子：
2.5
作者：
Miles, Meredith C.;Fuxjager, Matthew J.
通讯作者：
Fuxjager, Matthew J.