Egg phenotype differentiation in sympatric cuckoo Cuculus canorus gentes
Egg phenotype differentiation in sympatric cuckoo Cuculus canorus gentes
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DOI：
10.1111/j.1420-9101.2010.01982.x
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发表时间：
2010-06-01
影响因子：
2.1
通讯作者：
Shykoff, J. A.
中科院分区：
文献类型：
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作者：
Antonov, A.;Stokke, B. G.;Shykoff, J. A.
幼虫寄生的普通杜鹃Cuculus canorus由氏族组成，这些氏族通常只寄生一个寄主物种，它们经常模仿其卵子。在多个杜鹃氏族共生共存的情况下，我们可能会预期由于寄主开关或通过雄性的种间基因流动而导致的变异但通常较差的拟态，如果这些也对卵子表型有贡献的话。在这里，我们研究了寄生在部分重叠栖息地类型中的芦苇林莺、沼泽林莺和玉米象的三个杜鹃种群的卵特征分化和拟态。这三个杜鹃氏族在某些(但不是所有)蛋特征上表现出与三个寄主物种惊人的模仿程度，包括蛋大小，这是迄今为止基本上被忽视的蛋拟态特征。尽管存在基因流动的可能性，但背景和斑点颜色以及鸡蛋大小的表型匹配一直保持着密切的共性。
The brood parasitic common cuckoo Cuculus canorus consists of gentes, which typically parasitize only a single host species whose eggs they often mimic. Where multiple cuckoo gentes co-exist in sympatry, we may expect variable but generally poorer mimicry because of host switches or inter-gens gene flow via males if these also contribute to egg phenotypes. Here, we investigated egg trait differentiation and mimicry in three cuckoo gentes parasitizing great reed warblers Acrocephalus arundinaceus, marsh warblers Acrocephalus palustris and corn buntings Miliaria calandra breeding in close sympatry in partially overlapping habitat types. The three cuckoo gentes showed a remarkable degree of mimicry to their three host species in some but not all egg features, including egg size, a hitherto largely ignored feature of egg mimicry. Egg phenotype matching for both background and spot colours as well as for egg size has been maintained in close sympatry despite the possibility for gene flow.