Akçay Çağlar, Beecher Michael D
Department of Psychology, Koç University, Istanbul, Turkey; Department of Biological Sciences, Virginia Tech, Blacksburg, VA, USA.
Department of Psychology, University of Washington, Seattle, WA, USA; Department of Biology, University of Washington, Seattle, WA, USA.
Behav Processes. 2020 Sep;178:104184. doi: 10.1016/j.beproc.2020.104184. Epub 2020 Jun 16.
Bird song is socially learned. During song learning, the bird's hearing its own vocalization is important for normal development of song. Whether bird's own song is represented and recognized as a special category in adult birds, however, is unclear. If birds respond differently to their own songs when these are played back to them, this would be evidence for auditory self-recognition. To test this possibility, we presented song sparrow males (Melospiza melodia) playbacks of their own songs or stranger songs and measured aggressive responses as well as type matching. We found no evidence of behavioral discrimination of bird's own song relative to the (non-matching) stranger song. These findings cast doubt on an earlier proposal that song sparrows display auditory self-recognition and support the common assumption in playback experiments that bird's own song is perceived as stranger song.
鸟类的歌声是通过社交学习获得的。在歌声学习过程中，鸟类听到自己的发声对歌声的正常发育很重要。然而，成年鸟类是否将自己的歌声作为一种特殊类别进行表征和识别尚不清楚。如果向鸟类回放它们自己的歌声时，它们会有不同的反应，这将是听觉自我识别的证据。为了测试这种可能性，我们向歌带鹀雄性（Melospiza melodia）回放它们自己的歌声或陌生鸟类的歌声，并测量其攻击反应以及类型匹配情况。我们没有发现相对于（不匹配的）陌生鸟类歌声，鸟类对自己歌声存在行为辨别差异的证据。这些发现对之前关于歌带鹀表现出听觉自我识别的提议提出了质疑，并支持了回放实验中的普遍假设，即鸟类将自己的歌声视为陌生鸟类的歌声。
