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Impact of nest sanitation behavior on hosts’ egg rejection: an empirical study and meta-analyses
Current Zoology ( IF 2.2 ) Pub Date : 2021-07-13 , DOI: 10.1093/cz/zoab057
Qihong Li 1 , Jianli Bi 1 , Jiangwen Wu 1 , Canchao Yang 1
Affiliation  

Abstract
Egg rejection in birds is a specific adaptation toward avian brood parasitism, whereas nest sanitation is a general behavior for cleaning the nest and avoiding predation. However, both behaviors refer to the action of ejecting objects out of the nest, and nest sanitation has been proposed as a pre-adaptation for egg rejection. Here, we tested the eliciting effect of nest sanitation on egg rejection in the red-whiskered bulbul Pycnonotus jocosus, a potential host species that are sympatric with parasitic cuckoos. We conducted meta-analyses of previous studies on both nest sanitation and egg rejection, in order to evaluate the consistency of our conclusions. Our results showed that nest sanitation did not elicit egg rejection in P. jocosus. The conclusions concerning such an eliciting effect from previous studies were mixed, whereas the methodologies were inconsistent, making the studies unsuitable for comparisons. However, the ejection frequency of nest sanitation was consistently higher than the frequency of egg rejection across different host species or populations. These results suggest that nest sanitation, which is an ancient behavior, is more fundamental than egg rejection, but the effect of the former on the latter is complex and needs further study. Standardized methodologies and the integration of behavior, physiology, and modeling may provide better opportunities to explore the relationship between nest sanitation and egg rejection.


中文翻译:

巢穴卫生行为对寄主排卵的影响:实证研究和荟萃分析

摘要
鸟类的排卵是对鸟类寄生的一种特殊适应,而巢穴卫生是清洁巢穴和避免捕食的一般行为。然而,这两种行为都是指将物体弹出巢穴的行为,并且巢穴卫生已被提议作为排卵的预适应。在这里,我们测试了巢穴卫生对红须鹎Pycnonotus jocosus 排卵的影响,这是一种与寄生杜鹃同域的潜在宿主物种。我们对先前关于巢穴卫生和排卵的研究进行了荟萃分析,以评估我们结论的一致性。我们的研究结果表明,巢穴卫生不会引起P. jocosus的排卵. 先前研究中关于这种诱发效应的结论参差不齐,而方法论不一致,使得这些研究不适合进行比较。然而,巢穴卫生的排出频率始终高于不同宿主物种或种群的排卵频率。这些结果表明,巢穴卫生是一种古老的行为,比排卵更为根本,但前者对后者的影响是复杂的,需要进一步研究。标准化的方法和行为、生理学和建模的整合可能为探索巢穴卫生和排卵之间的关系提供更好的机会。
更新日期:2021-07-13
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