Use of social over personal information enhances nest defense against avian brood parasitism
Use of social over personal information enhances nest defense against avian brood parasitism
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DOI：
10.1093/beheco/arq225
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发表时间：
2011-03-01
影响因子：
2.4
通讯作者：
Sealy, Spencer G.
中科院分区：
文献类型：
--
作者：
Campobello, Daniela;Sealy, Spencer G.
与同种动物的相互作用会影响生物体的行为，因为它们适用于觅食技术、鸣叫、栖息地选择和配偶选择。很少有研究人员研究过社会互动在塑造防御反应中的作用，尤其是巢穴的防御。我们测试了社会互动对芦苇莺（Acrocephalus scirpaceus）巢穴防御的影响，芦苇莺是欧洲寄生杜鹃（Cuculus canorus）的主要宿主之一。这种寄生虫会降低宿主的繁殖成功率；因此，应选择任何防止成功寄生的反应。由于它们的高筑巢密度和一致的杜鹃特异性反应也会招募同种，芦苇莺可能会通过从同种获得已经有能力的抗寄生虫反应而受益，而不是在试错尝试中产生隐含的成本。通过使用包括标本剥制展示、抓握操作和回放在内的处理方法，我们测试了同种防御对筑巢芦苇莺反应强度的影响。暴露于社交线索会导致杜鹃特定巢穴防御反应的增加，而自然或实验寄生的经历不会导致防御强度发生任何变化。在增强聚众行为时优先使用社会线索而不是个人经验与其他行为中发现的情况是一致的，在其他行为中，个人采取的策略是昂贵的个人信息获取和社会线索可靠性的结果。
Interactions with conspecifics influence the behavioral repertoire of an organism, as they apply to foraging techniques, song acquisition, habitat selection, and mate choice. Few workers have studied the role of social interactions in molding defense responses, especially the defense of the nest. We tested the effect of social interaction on nest defense of the reed warbler (Acrocephalus scirpaceus), one of the main hosts of the brood-parasitic common cuckoo (Cuculus canorus) in Europe. This parasite reduces its host's breeding success; therefore, any response that prevents successful parasitism should be selected. Because of their high nesting density and consistent cuckoo-specific responses that also recruit conspecifics, reed warblers may benefit by acquiring already-competent antiparasite responses from conspecifics instead of incurring the costs implicit in trial-and-error attempts. Using treatments that included presentations of taxidermic mounts, clutch manipulations, and playbacks, we tested the effect of conspecific defense on the response intensity of nesting reed warblers. Exposure to social cues resulted in an increase of cuckoo-specific nest defense responses, whereas experience with natural or experimental parasitism did not produce any change in defense intensity. The preferential use of social cues rather than personal experience as it applies to the enhancement of mobbing was consistent with what was found in other behaviors, where the strategy adopted by individuals was the result of costly acquisition of personal information and reliability of social cues.