Hawk mimicry and the evolution of polymorphic cuckoos
Hawk mimicry and the evolution of polymorphic cuckoos
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DOI：
10.5122/cbirds.2013.0002
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发表时间：
2013-03
期刊：
影响因子：
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通讯作者：
R. Thorogood;N. Davies
中科院分区：
文献类型：
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作者：
R. Thorogood;N. Davies
一些寄生杜鹃与阿克西特鹰的相似之处自古以来就为人所知。最近的实验表明，普通杜鹃（Cuculus canorus）的鹰状特征有助于进入芦莺（Acrocephalus scirpaceus）的宿主巢穴。然而，社会信息提醒主人要识破杜鹃的伪装。反过来，这促进了杜鹃多态性的进化，以阻止宿主识别。在这里，我们通过比较分析表明，具有鹰状特征（黄色眼睛，条纹腹部，黄色腿）的寄生杜鹃比没有（8%）的寄生杜鹃更有可能具有多态性（29%）。系统发育分析证实了鹰样特征与杜鹃多态性的相关进化。我们认为，mimicry动力学特别有可能促进寄生杜鹃的各种伪装的进化，以击败宿主的防御。
The resemblance of some parasitic cuckoos to Accipiter hawks has been known since an- cient times. Recent experiments show that the hawk-like features of Common Cuckoos (Cuculus canorus) facilitate access to Reed Warbler (Acrocephalus scirpaceus) host nests. However, social infor- mation alerts hosts to see through the cuckoo's mimetic disguise. In turn, this has promoted the evo- lution of a cuckoo polymorphism to thwart host recognition. Here we show by comparative analyses that parasitic cuckoos with hawk-like features (yellow eyes, barred underparts, yellow legs) are more likely to be polymorphic (29% of species) than those without (8% of species). Phylogenetic analyses confirm correlated evolution of hawk-like features and cuckoo polymorphism. We suggest that mim- icry dynamics are particularly likely to promote the evolution of various guises in parasitic cuckoos to beat host defences.