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鸣禽歌声的装饰性和空间能力之间的潜在权衡。

Potential trade-off between vocal ornamentation and spatial ability in a songbird.

机构信息

Department of Biology, Duke University, Durham, NC 27708, USA.

出版信息

Biol Lett. 2013 May 22;9(4):20130344. doi: 10.1098/rsbl.2013.0344. Print 2013 Aug 23.

Abstract

Bird song is hypothesized to be a reliable indicator of cognition because it depends on brain structure and function. Song features have been found to correlate positively with measures of cognition, but the relationship between song and cognition is complicated because not all cognitive abilities are themselves positively correlated. If cognition is not a unitary trait, developmental constraints on brain growth could generate trade-offs between some aspects of cognition and song. To further clarify the relationship between song and cognition in song sparrows (Melospiza melodia), we examined repertoire size and performance on a spatial task. We found an inverse relationship between repertoire size and speed of spatial learning and suggest that a developmental trade-off between the hippocampus and song control nuclei could be responsible for this relationship. By attending to male song, females may learn about a suite of cognitive abilities; this study suggests that females may glean information about a male's cognitive weaknesses as well as his strengths.

摘要

鸟鸣被假设为认知的可靠指标,因为它取决于大脑的结构和功能。已经发现歌曲特征与认知测量呈正相关,但歌曲和认知之间的关系很复杂,因为并非所有认知能力本身都是正相关的。如果认知不是单一的特征,那么大脑生长的发育限制可能会导致认知和歌曲的某些方面之间产生权衡。为了进一步阐明在歌雀(Melospiza melodia)中歌曲和认知之间的关系,我们检查了曲目的大小和空间任务的表现。我们发现曲目大小与空间学习速度之间存在反比关系,这表明海马体和歌曲控制核之间的发育权衡可能是造成这种关系的原因。通过关注雄性歌曲,雌性可能会了解一系列认知能力;这项研究表明,雌性可能会了解到雄性的认知弱点以及他的优点。

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