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001-es BibID:BIBFORM042011
Első szerző:Moskát Csaba
Cím:Cuckoo parasitism on two closely-related Acrocephalus warblers in distant areas: a case of parallel coevolution? / Csaba Moskát, Fugo Takasu, A. Roman Muñoz, Hiroshi Nakamura, Miklós Bán, Zoltán Barta
Megjegyzések:Common Cuckoos (Cuculus canorus) parasitize nests of small passerines. The Cuckoochicks cause the death of their nest-mates when evicting eggs or nestlings from the nests; consequently,hosts suffer from a high loss of reproduction. Host adaptations against parasitism, e.g., byegg discrimination behavior, and cuckoo counter-adaptations to hosts, e.g., by mimetic eggs, are oftenregarded as a result of the arms race between the two interacting species. In Hungary Great ReedWarblers (Acrocephalus arundinaceus) are the main hosts of cuckoos, suffering from heavy parasitism(ca. 40-65%). The Oriental Reed Warbler (A. orientalis), formerly a subspecies of the Great ReedWarbler (A. a. orientalis), is also a highly parasitized host in Japan (25-40%). We compared maincharacteristics of Cuckoo parasitism in these two distant areas from the Western and Eastern Palearcticby comparing cuckoo egg mimicry. We measured color characteristics of host and parasitic eggsby spectrophotometer. Visual modeling revealed lower chromatic distances between Cuckoo and hosteggs in Hungary than in Japan, but high variation both in host and Cuckoo eggs may cause matchingproblems in Hungary. Achromatic (brightness) difference between host and Cuckoo eggs were lowerin Japan than in Hungary, and it proved to be the most important factor affecting egg rejection. Hostsrejected Cuckoo eggs at similar frequencies (37% and 35% in Hungary and Japan, respectively). Hostadaptation, i.e., egg rejection behavior, seems to be preceding Cuckoo counter-adaptations to hosts inJapan. We suggest that the Cuckoo-Great/Oriental Reed Warbler relationships developed in alternativeways in Japan and Hungary, and they represent different stages of their arms race.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Acrocephalus arundinaceus
Acrocephalus orientalis
arms race
brood parasitism
Cuculus canorus
egg discrimination
parallel coevolution
Élettudományok - Biológiai tudományok
Megjelenés:Chinese Birds. - 3 : 4 (2012), p. 320-329. -
További szerzők:Takasu, Fugo Muñoz, A. Roman Nakamura, Hiroshi Bán Miklós (1975-) (biológus) Barta Zoltán (1967-) (biológus, zoológus)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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