Nuthatches eavesdrop on variations in heterospecific chickadee mobbing alarm calls
Nuthatches eavesdrop on variations in heterospecific chickadee mobbing alarm calls
复制标题
DOI：
10.1073/pnas.0605183104
复制
发表时间：
2007-03-27
影响因子：
11.1
通讯作者：
Greene, Erick
中科院分区：
文献类型：
--
作者：
Templeton, Christopher N.;Greene, Erick
许多动物识别其他物种发出的警报信号，但它们从这些被窃听的信号中收集到的信息量尚不清楚。我们之前展示了黑帽山雀(Poecile Atricapillus)有一个复杂的警报呼叫系统，在这个系统中，它们编码关于潜在捕食者的大小和风险的复杂信息，这些信息来自一种不同类型的围捕警报呼叫。在这里，我们通过实验证明，红胸裸毛雀(Sitta Canensis)对这些异种的“鸡叫”的细微变化做出了适当的反应，从而证明它们已经获得了关于环境中潜在捕食者的重要信息。这项研究表明，在税收间窃听方面，存在着以前未被怀疑的歧视程度。
Many animals recognize the alarm calls produced by other species, but the amount of information they glean from these eavesdropped signals is unknown. We previously showed that blackcapped chickadees (Poecile atricapillus) have a sophisticated alarm call system in which they encode complex information about the size and risk of potential predators in variations of a single type of mobbing alarm call. Here we show experimentally that red-breasted nuthatches (Sitta canadensis) respond appropriately to subtle variations of these heterospecific "chick-a-dee" alarm calls, thereby evidencing that they have gained important information about potential predators in their environment. This study demonstrates a previously unsuspected level of discrimination in intertaxon eavesdropping.