Experimental evidence that cuckoos preferentially parasitize host nests early in their laying cycle
Experimental evidence that cuckoos preferentially parasitize host nests early in their laying cycle
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DOI：
10.1016/j.avrs.2022.100042
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发表时间：
2022-01-01
期刊：
影响因子：
1.8
通讯作者：
Feeney, William E.
中科院分区：
文献类型：
--
作者：
Wang, Longwu;He, Gangbin;Feeney, William E.
像普通杜鹃(Cuculus Canorus)这样的孵化寄生虫，依靠操纵其他物种的宿主来抚养后代。选择应该有利于那些能够识别和选择与自己卵子孵化阶段密切匹配的寄主巢的个体。虽然这是直观的，并得到了大量长期监测研究结果的支持，但这方面的实验证据仍然很少。通过视频监控，我们使用了三个试验组来探索杜鹃是否会优先选择产卵周期早期的寄主东方林莺(Acrocephalus Orientalis)的巢。我们发现，普通杜鹃优先寄生在产卵较早(产卵较少)或筑巢周期较早(产卵较多)或筑巢周期较早(产卵较少或产卵较少)的东方芦苇林莺的巢中，我们的实验视频为它们的决策过程提供了直接的见解。我们的结果提供了强有力的实验证据，表明普通杜鹃能够评估筑巢阶段，并战略性地选择增加成功寄生可能性的巢穴。
Brood parasites, such as the Common Cuckoo (Cuculus canorus), rely on manipulating hosts from other species to raise their offspring. Selection should favor individuals that are able to identify and choose host nests that closely match the incubation stage of their own eggs. While intuitive, and supported by the findings of numerous long-term monitoring studies, experimental evidence of this remains sparse. By using video monitoring, we used three experimental groups to explore whether Common Cuckoos preferentially choose host Oriental Reed Warbler (Acrocephalus orientalis) nests that are early in their laying cycle. We found that Common Cuckoos preferentially parasitize nests of the host Oriental Reed Warbler that are earlier in their laying (less vs. more eggs) or nesting cycle (eggs vs. chicks), and videos of our experiments provide direct insights into their decision making process. Our results provide strong experimental evidence that Common Cuckoos are able to assess nesting stage and strategically choose nests that increase the likelihood of successful parasitism.