Nest defenses and egg recognition of yellow-bellied prinia against cuckoo parasitism
Nest defenses and egg recognition of yellow-bellied prinia against cuckoo parasitism
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黄腹鹩莺对杜鹃寄生的巢防御和卵识别
DOI：
10.1007/s00114-014-1209-8
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发表时间：
2014-09-01
影响因子：
--
通讯作者：
Moller, Anders Pape
中科院分区：
文献类型：
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作者：
Yang, Canchao;Wang, Longwu;Moller, Anders Pape
在多寄生虫系统中，寄生虫可以阻断宿主的防御，从而通过频率依赖性选择阻碍宿主对寄生虫的识别。巢防御作为前线可能会阻止或促进后续阶段的防御，如鸡蛋识别。本研究以黄腹滨鹬（Priniaflaviventris）为研究对象，比较研究了东方杜鹃（Cuculus optatus）在中国大陆多种杜鹃和台湾单种杜鹃环境下的防御策略。杜鹃宿主对杜鹃的攻击性并不表现在多个杜鹃物种的存在下，但表现出强大的攻击性防御的主机针对杜鹃在台湾。此外，杜鹃宿主种群与一个单一的杜鹃物种是能够区分成人的育雏寄生虫，东方杜鹃，从成人常见的杜鹃（Cuculus canorus）。这代表了杜鹃宿主第一次被证明能特异性地区分东方杜鹃和其他杜鹃属物种。在单种杜鹃系统中，杜鹃的产卵率高于多种杜鹃系统，这支持了策略促进假说。基于鸟类视觉模型的卵表型变化的粒度分析支持宿主中的卵签名假设，因为台湾莺增加了个体宿主中卵外观的一致性，从而有利于对杜鹃卵的有效区分。这项研究显着提高了我们的知识种内变异的抗寄生行为之间的主机单和多杜鹃系统。
Parasites may, in multi-parasite systems, block the defenses of their hosts and thus thwart host recognition of parasites by frequency-dependent selection. Nest defenses as frontline may block or promote the subsequent stage of defenses such as egg recognition. We conducted comparative studies of the defensive strategies of a host of the Oriental cuckooCuculus optatus, the yellow-bellied priniaPrinia flaviventris, in mainland China with multiple species of cuckoos and in Taiwan with a single cuckoo species. Cuckoo hosts did not exhibit aggression toward cuckoos in the presence of multiple cuckoo species but showed strong aggressive defenses of hosts directed toward cuckoos in Taiwan. Furthermore, the cuckoo host in populations with a single cuckoo species was able to distinguish adults of its brood parasite, the Oriental cuckoo, from adult common cuckoos (Cuculus canorus). This represents the first case in which a cuckoo host has been shown to specifically distinguish Oriental cuckoo, from otherCuculusspecies. Hosts ejected eggs at a higher rate in a single cuckoo species system than in a multi-species cuckoo system, which supports the strategy facilitation hypothesis. Granularity analysis of variation in egg phenotype based on avian vision modeling supported the egg signature hypothesis in hosts because Taiwanese prinias increased consistency in the appearance of their eggs within individual hosts thus favoring efficient discrimination against cuckoo eggs. This study significantly improves our knowledge of intraspecific variation in antiparasitism behavior of hosts between single- and multi-cuckoo systems.