Soler M, Soler JJ, Martinez JG
Departamento de Biologia Animal y Ecologia, Facultad de Ciencias, Universidad de Granada
Anim Behav. 1997 Nov;54(5):1227-33. doi: 10.1006/anbe.1997.0524.
Adult great spotted cuckoos, Clamator glandariusdamage the eggs of their magpie, Pica picahost without removing or eating them. The number of damaged magpie eggs was recorded in 360 parasitized nests of which 62.2% contained between one and eight damaged magpie eggs. Egg-destroying behaviour may be adaptive if it reduces nestling competition and/or enhances the hatching success of the cuckoo. To clarify the role of egg destruction for the reproductive success of great spotted cuckoos, unparasitized magpie nests were experimentally parasitized (without egg damage) by introducing cuckoo eggs or chicks. Egg damage was common in parasitized nests but the eggs were not damaged by the hosts. Egg damage increased the breeding success of the cuckoos, by both reducing the number of competing host chicks in the nest and increasing the likelihood that late-laid cuckoo eggs would hatch.Copyright 1997 The Association for the Study of Animal Behaviour1997The Association for the Study of Animal Behaviour
成年大斑凤头鹃（Clamator glandarius）会损坏其喜鹊（Pica pica）寄主的卵，但不会将卵移除或吃掉。在360个被寄生的喜鹊巢中记录了被损坏的喜鹊卵数量，其中62.2%的巢中有1至8枚被损坏的喜鹊卵。如果破坏卵的行为能够减少雏鸟之间的竞争和/或提高杜鹃的孵化成功率，那么这种行为可能具有适应性。为了阐明破坏卵对大斑凤头鹃繁殖成功的作用，通过引入杜鹃卵或雏鸟，对未被寄生的喜鹊巢进行了实验性寄生（卵未被损坏）。在被寄生的巢中，卵被破坏的情况很常见，但卵并非被寄主破坏。破坏卵提高了杜鹃的繁殖成功率，既减少了巢中竞争的寄主雏鸟数量，又增加了晚产杜鹃卵孵化的可能性。
版权所有1997动物行为研究协会
1997动物行为研究协会
