Close calling regulates spacing between foraging competitors in the group-living pied babbler
Close calling regulates spacing between foraging competitors in the group-living pied babbler
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DOI：
10.1016/j.anbehav.2007.05.016
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发表时间：
2008-02-01
期刊：
影响因子：
2.5
通讯作者：
Ridley, Amanda R.
中科院分区：
文献类型：
--
作者：
Radford, Andrew N.;Ridley, Amanda R.
在群居物种发出的各种发声曲目中，也许最常听到的是“近距离”叫声(持续时间短、幅度低的叫声)。尽管它们很普遍，而且许多研究都集中在它们在灵长类社会中的功能上，但在鸟类中几乎没有开展过千载难逢的工作。我们采用观察、补充喂养和回放实验相结合的方法，研究了一种特殊的近距离鸣叫--查克在群体生活的花斑斑嘴鱼中的作用。没有证据表明，Chuck Call被用来向食物来源招募同种物种，或降低个体与群体分离的可能性。相反，有很好的证据表明，它被用来调节潜在觅食竞争对手之间的间隔。虽然Chuck的叫声并没有被用来阻止试图分享个体觅食补丁的竞争者，但它似乎表明了觅食者的当前位置，从而将另一群成员接近的可能性降至最低。在更大的群体中，当最近的邻居离他们更近时(即当觅食竞争可能更高时)，觅食者提高了他们的呼叫率，而Chuck呼叫的回放导致个人比背景噪音更远离说话者。保持间隔是有益的，因为如果个体共享一个觅食斑块，那么它们的觅食效率会降低。这项研究是对鸟类亲密呼唤功能的第一次实验测试之一。(C)2007年，动物行为研究协会。爱思唯尔出版有限公司版权所有。
Among the wide repertoire of vocalizations produced by social species, perhaps the most frequently heard are the 'close' calls (those of short duration and low amplitude). Despite their prevalence, and the many studies focusing on their function in primate societies, little work has been conducted on close calls in avian species. We used a combination of observations, supplementary feeding and playback experiments to investigate the function of one particular close call, the 'chuck', in group-living pied babblers, Turdoides bicolor. There was no evidence that the chuck call is used to recruit conspecifics to a food source or to reduce the likelihood of an individual becoming separated from the group. Instead, there was good evidence that it is used to regulate spacing between potential foraging competitors. Although the chuck call is not used aggressively to deter competitors that attempt to share an individual's foraging patch, it appears to indicate the forager's current position and thus minimize the likelihood of another group member approaching closely in the first place. Foragers increased their call rate in larger groups and when their nearest neighbour was closer (i.e. when foraging competition was potentially higher), and playbacks of chuck calling caused individuals to stay further away from the speaker than did background noise. Maintenance of spacing was beneficial because individuals suffered a decrease in foraging efficiency if they shared a foraging patch. This study represents one of the first experimental tests of the function of avian close calling. (c) 2007 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. Ali rights reserved.