Symmetry in the songs of crickets
Symmetry in the songs of crickets
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蟋蟀的歌声中的对称性
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
M. Ritchie
中科院分区：
文献类型：
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作者：
L. Simmons;M. Ritchie
雄性产生的声音信号往往受到性选择的影响。蟋蟀产生歌声的机制已经得到了很好的证明。据说，板球歌曲的特点是频率恒定的几乎纯音。然而，与以前的工作相反，我们发现板球歌曲表现出不同程度的频率调制，这取决于声音共振器或竖琴的不对称程度。最近对性别选择特征的研究表明，体型和对称性可能反映了男性的质量。蟋蟀的竖琴表现出方向不对称，其程度与身体大小的波动不对称程度直接相关。我们发现，女性更喜欢低载波频率的纯音，这是大型对称竖琴的特征。因此，定向不对称可以传达关于编码在男性歌曲中的男性质量的可靠信息。
Acoustic signals produced by males are often subject to sexual selection. The mechanism of song production in crickets is well documented. Cricket songs are said to be characterised by almost pure tones of constant frequency. However, contrary to previous work, we show that cricket songs exhibit frequency modulation to varying degrees, dependent on the degree of asymmetry in the sound resonators or harps. Recent studies of sexually selected traits suggest that size and symmetry may reflect male quality. The harps of crickets exhibit directional asymmetry to a degree that is directly related to the degree of fluctuating asymmetry in a measure of body size. We show that females prefer pure tones of low carrier frequency, characteristic of large symmetrical harps. Directional asymmetry may thus convey reliable information regarding male quality encoded in the male’s song.