Dataset for group living and duetting in barbet species

The duets of birds have intrigued biologists for a long time, yet much remains unknown about the evolution of these striking collective displays. This is because previous studies on duet evolution have been biased to songbirds and neglected other bird groups. In songbirds, the absence of migration has been found to predict the occurrence of duetting, indirectly supporting the idea that duet communication is linked with pair-bonding. Here, we used phylogenetic comparative analyses in a sedentary clade of non-songbirds, the barbets (Capitonidae), to reveal new correlates of duet evolution in birds. We found (1) that duets evolved several times independently in different barbet lineages and (2) that duetting evolved in association with group living (i.e. the presence of helpers or non-breeding adults during the breeding period), but not with sexual monochromatism or habitat type. We conclude that the evolution of social systems has a major influence on the evolution of collective signallin...

长久以来，鸟类的二重鸣唱一直引发生物学家的浓厚兴趣，但针对这类引人注目的集体鸣唱行为的演化，仍有诸多未解之处。究其原因，过往有关二重鸣唱演化的研究多偏向鸣禽（songbirds），却忽略了其他鸟类类群。在鸣禽中，研究发现留居（无迁徙行为）可预示二重鸣唱的出现，这间接佐证了二重鸣唱交流与配偶联结存在关联的观点。本研究针对非鸣禽的定居演化支——须鴷科（Capitonidae）鸟类开展系统发育比较分析，以期揭示鸟类二重鸣唱演化的全新关联因素。研究结果显示：其一，二重鸣唱在须鴷的不同演化支系中独立起源多次；其二，二重鸣唱的演化与社群生活（即繁殖期存在育雏帮手或非繁殖成鸟）显著相关，而与雌雄同色或栖息地类型并无关联。综上，我们认为社会系统的演化对集体信号交流的演化具有关键影响……