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Is male condition corrected with song features in Dusky Warblers (Phylloscopus fuscatus)
Avian Research ( IF 1.8 ) Pub Date : 2019-05-20 , DOI: 10.1186/s40657-019-0158-5
Jiaojiao Wang , Jianping Liu , Zhenqun Zhang , Hongxin Ren , Lijie Gao , Jianhua Hou

Birdsong is an important form of communication that plays an important role in territorial defense and mate attraction by conveying valuable information. While body-size and song frequency are often negatively correlated among species, this relationship is only found in a few songbirds. Previous studies on the Dusky Warbler (Phylloscopus fuscatus) found that there was a positive correlation between tarsus length and peak frequency. And heavier male Dusky Warblers possess better territories and obtain more opportunities for mating; body condition may be related to reproduction of birds, so females may choose heavier mates or better body condition based on the singing characteristics of males. We recorded spontaneous song and measured morphology of 33 male Dusky Warblers in Saihanba Forest Farm area between July 5 and August 10, 2015. We chose body weight as an indicator of body size and defined body condition as residuals from a linear regression between body weight and tarsus length. Frist, we used Pearson correlation to analyze whether date and time of day were correlated with weight, and then we used linear regression to analyze whether sound features could indicate the body weight and body condition. We call body weight and body condition the male condition. We found no effect of date and time of day on weight, and we showed a correlation between the male condition and song features in the small songbird, Dusky Warbler. Maximum trill quality and maximum peak frequency of songs were negatively related to male condition; the mean number of syllables of songs and maximum high frequency of songs were positively correlated with body weight and body condition. In the small songbird, Dusky Warbler, four song parameters, including maximum trill quality, mean number of syllables of songs, maximum peak frequency of songs, maximum high frequency of songs, significantly predicted male condition change of which the most important song characteristic for male condition was maximum trill quality. This study suggested that the extreme song features were more constrained by male condition than mean sound characteristics.

中文翻译:

雄性状况是否已通过《暗夜莺》(Phylloscopus fuscatus)中的歌曲功能得到纠正

鸟鸣是一种重要的交流形式,它通过传达有价值的信息,在领土防御和伴侣交配中起着重要作用。尽管体型和歌曲频率通常在物种之间呈负相关,但这种关系仅在少数鸣鸟中才发现。以前对暗夜莺(Phylloscopus fuscatus)的研究发现,架长度与峰值频率之间存在正相关。雄性较暗的雄性莺莺拥有更好的领土并获得更多的交配机会;身体状况可能与鸟类的繁殖有关,因此雌性可以根据雄性的歌唱特性选择较重的伴侣或更好的身体状况。我们记录了2015年7月5日至8月10日之间塞罕坝森林农场地区33头雄性雄性莺的自发歌曲并测量了形态。我们选择体重作为体重的指标,并将身体状况定义为体重与架长度之间的线性回归的残差。首先,我们使用Pearson相关性分析日期和时间是否与体重相关,然后使用线性回归分析声音特征是否可以指示体重和身体状况。我们称体重和身体状况为男性状况。我们发现日期和时间对体重没有影响,并且在小鸣禽“ Dusky Warbler”中,雄性状况与歌曲特征之间存在相关性。歌曲的最大颤音质量和最大峰值频率与男性状况呈负相关。歌曲的平均音节数和最大的高频度与体重和身体状况呈正相关。在小鸣鸟(Dusky Warbler)中,四个歌曲参数,包括最大颤音质量,平均歌曲音节数,最大歌曲峰值频率,最大高频歌曲,显着预测了男性状况的变化,其中男性最重要的歌曲特征条件是最大的颤音质量。这项研究表明,极端歌曲的特征更受男性状况的限制,而不是平均声音特征。
更新日期:2019-05-20
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