Riebel K, Slater PJ
School of Biology, University of St Andrews
Anim Behav. 2000 Jun;59(6):1135-1142. doi: 10.1006/anbe.2000.1421.
Many songbird species with small song type repertoires repeat each type a few times before switching to the next. Thus, their singing style may constrain their ability to switch. However, the proximate causation of song type switching is poorly understood. We exposed male chaffinches to (nonoverlapping) playbacks of single renditions of their own songs rather than a series of songs, thus stimulating them with a single external auditory event. The most prominent effect of the playback was an increase in the duration of the current song type bout. If the song type played back was different to that the subject was singing at the time, bout duration increased less than if it was of the same song type. The short-term changes induced by the playback suggest that the auditory input increases the motivational level for a particular song type. In the chaffinch this results in a delayed switch rather than in song type matching as a reaction to acoustic stimulation by conspecific song. Copyright 2000 The Association for the Study of Animal Behaviour.
许多拥有少量鸣唱类型 repertoire 的鸣禽物种，在切换到下一种类型之前，会将每种类型重复几次。因此，它们的鸣唱风格可能会限制其切换能力。然而，歌曲类型切换的近因却知之甚少。我们让雄性苍头燕雀接触其自身歌曲的单一声乐版本（不重叠）的回放，而不是一系列歌曲，从而通过单个外部听觉事件刺激它们。回放的最显著效果是当前歌曲类型回合的持续时间增加。如果回放的歌曲类型与受试者当时正在演唱的不同，回合持续时间的增加比歌曲类型相同时要少。回放引起的短期变化表明，听觉输入会提高特定歌曲类型的动机水平。在苍头燕雀中，这会导致延迟切换，而不是像对同种歌曲的声学刺激做出反应那样进行歌曲类型匹配。版权所有 2000 年动物行为研究协会。
