In a songbird, the black redstart, parents use acoustic cues to discriminate between their different fledglings
In a songbird, the black redstart, parents use acoustic cues to discriminate between their different fledglings
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DOI：
10.1016/j.anbehav.2005.06.022
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发表时间：
2006-05-01
期刊：
影响因子：
2.5
通讯作者：
Kreutzer, Michel
中科院分区：
文献类型：
--
作者：
Draganoiu, Tudor I.;Nagle, Laurent;Kreutzer, Michel
一些关于亲代对领地鸣禽投资的研究报告了巢分裂的存在。这是一种雏鸟照顾方式，其中每个父母对同一窝内的不同幼崽都有长期的喂养偏好，从而形成两个家庭单位。最近的理论工作表明，个体之间的冲突应该选择分巢。然而，人们对这种行为策略的发生和维持所涉及的机制知之甚少。考虑到幼鸟乞讨的比例很高，我们假设声音辨别可以在近似水平上解释进食偏好的稳定性。在一项为期三年的实地研究中，我们记录了黑红尾鸲（Phoenicurus ochruros）（一种领地鸣禽）的父母对播放由雄性和雌性喂食的幼鸟的乞求叫声的反应。父母对他们优先喂养的雏鸟的叫声做出了更多的反应。对这些叫声的主成分分析表明，父母可能会认出个别的后代。据我们所知，这项研究提供了第一个证据，证明鸟类可以通过声音区分自己的两类后代：它优先喂养的后代和由另一父母喂养的后代。 (c) 2006 年动物行为研究协会由爱思唯尔有限公司出版。保留所有权利。
Several studies on parental investment in territorial songbirds have reported the existence of brood division. This is a type of postfledging care in which each parent has long-term feeding preferences for different young within a brood, creating two family units. Recent theoretical work indicates that conflicts between individuals should select for brood division. However, little is known about the mechanisms involved in the onset and maintenance of this behavioural strategy. Given the high rate of fledglings' begging calls, we hypothesized that acoustic discrimination could explain the stability of feeding preferences at a proximate level. In a 3-year field study, we recorded the responses of parent black redstarts, Phoenicurus ochruros, a territorial songbird, to playback of the begging calls of fledglings fed by the male and by the female. Parents responded more to the calls of the fledglings that they preferentially fed. A principal component analysis of the calls suggested that parents may recognize individual offspring. To our knowledge, this study provides the first evidence that a bird can acoustically discriminate between two categories of its own offspring: those that it preferentially feeds and those fed by the other parent. (c) 2006 The Association for the Study of Animal Behaviour Published by Elsevier Ltd. All rights reserved.