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Cuckoo parasitism on two closely-related Acrocephalus warblers in distant areas:a case of parallel coevolution?

Chinese Birds 2012年第4期3卷 320-329,342页

作者： csaba moskat Fugo TAKASU A.Roman MU OZ Hiroshi NAKAMURA Miklós BaN Zoltán BARTA 匈牙利科学院生态学研究组/匈牙利罗兰大学/匈牙利自然历史博物馆日本奈良女子大学信息与计算机科学系西班牙Fundacian MigresN-340Km.96AlgecirasE-11390Cádiz 日本信州大学教育学院生物学系匈牙利德布勒森大学进化动物学系行为生态学研究组

Common Cuckoos(Cuculus canorus) parasitize nests of small passerines.e Cuckoo chicks cause the death of their nest-mates when evicting eggs or nestlings from the nests;consequently,hosts su er from a high loss of *** adaptations against parasitism,e.g.,by egg discrimination behavior,and cuckoo counter-adaptations to hosts,e.g.,by mimetic eggs,are often regarded as a result of the arms race between the two interacting *** Hungary Great Reed Warblers(Acrocephalus arundinaceus) are the main hosts of cuckoos,su ering from heavy parasitism(ca.40-65%).e Oriental Reed Warbler(***),formerly a subspecies of the Great Reed Warbler(***),is also a highly parasitized host in Japan(25-40%).We compared main characteristics of Cuckoo parasitism in these two distant areas from the Western and Eastern Palearctic by comparing cuckoo egg *** measured color characteristics of host and parasitic eggs by *** modeling revealed lower chromatic distances between Cuckoo and host eggs in Hungary than in Japan,but high variation both in host and Cuckoo eggs may cause matching problems in ***(brightness) di erence between host and Cuckoo eggs were lower in Japan than in Hungary,and it proved to be the most important factor a ecting egg *** rejected Cuckoo eggs at similar frequencies(37% and 35% in Hungary and Japan,respectively).Host adaptation,i.e.,egg rejection behavior,seems to be preceding Cuckoo counter-adaptations to hosts in *** suggest that the Cuckoo-Great/Oriental Reed Warbler relationships developed in alternative ways in Japan and Hungary,and they represent di erent stages of their arms race.

关键词： Acrocephalus arundinaceus Acrocephalus orientalis arms race brood parasitism Cuculus canorus egg discrimination parallel coevolution

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