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Does nest sanitation elicit egg rejection in an open-cup nesting cuckoo host rejecter?

Avian Research 2018年第4期9卷 294-298页

作者： Tongping Su Chanchao Yang Shuihua Chen Wei Liang Zhejiang Museum of Natural History Hangzhou 310014China Ministry of Education Key Laboratory for Ecology of Tropical Islands College of Life SciencesHainan Normal UniversityHaikou 571158China

Background: Nest sanitation behavior is one of the most important means to ensure high reproductive efficiency. In avian brood parasitism, nest sanitation behavior may be a pre-adaptation of host birds that allows them to identify the parasitic eggs, so that egg discrimination behavior may have evolved from nest sanitation behavior. However, whether nest sanitation behavior could improve egg rejection in cuckoo hosts was ***: In this study, we investigated the relationship between nest sanitation and egg discrimination behavior in a potential cuckoo host, the Brown-breasted bulbul(Pycnonotus xanthorrhous) with two experimental groups. In the first group, we added a blue, non-mimetic egg to the nest of the host, while in the second group we added a blue, non-mimetic egg and a peanut ***: The results showed that in the first group, the probability of rejecting the non-mimetic eggs was 53.8%(n = 26 nests). In comparison, all of the Brown-breasted bulbuls in the second group were able to rapidly remove the peanut shells from the nest, but only 52.6%(n = 19 nests) rejected the non-mimetic eggs. The rejection rates of the non-mimetic eggs in both experimental groups were not significantly ***: Our study indicated that nest sanitation behavior of Brown-breasted bulbuls did not influence their egg recognition and that egg discrimination ability of Brown-breasted bulbuls was not directly related to nest sanitation behavior.

关键词： Brood parasitism Brown-breasted bulbul Egg discrimination Nest sanitation behavior Cuckoo host

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