Macrogeographic Variation in Song – a Test of Competition and Habitat Effects in Blue Tits
Macrogeographic Variation in Song – a Test of Competition and Habitat Effects in Blue Tits
复制标题
鸣叫的宏观地理变化——蓝山雀竞争和栖息地效应的测试
DOI：
--
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
M. Lambrechts
中科院分区：
文献类型：
--
作者：
C. Doutrelant;M. Lambrechts
对表型变异的环境原因的调查可能会揭示导致这些表型进化的选择压力的信息。蓝山雀（Parus caeruleus）的歌声在包含颤音（即在歌曲结束时以非常快的速度重复的一系列相同的音符）的歌曲类型的比例方面存在地理差异。为了确定影响蓝山雀颤音鸣叫比例地理变异的环境因素，我们进行了比较研究。在宏观地理和区域尺度上，我们研究了三个因素的影响，可能会影响地理变化的蓝山雀歌：优势植被类型，种内竞争和种间竞争与大山雀（山雀）。种间竞争可能导致歌曲趋同或歌曲分歧（以下称为字符转移）。我们得到的结果是一致的字符转移假设的预测：歌曲呈现不同的语法大山雀歌曲（歌曲颤音）的比例显着增加，相对大山雀密度。结果不支持关于歌曲收敛或种内竞争的假设的预测。这些结果与声学适应假说的一些预测是一致的。
Investigations into the environmental causes of phenotypic variation may reveal information regarding the selective pressures leading to the evolution of these phenotypes. Blue tit (Parus caeruleus) song varies geographically in the proportion of song types that contain a trill (i.e. a series of identical notes repeated in sequence at a very rapid rate produced at the end of a song). In order to determine the environmental factors influencing geographic variation in the proportion of blue tit songs with a trill, we conducted a comparative study. At macrogeographic and regional scales we examined the effect of three factors that could influence geographic variation in blue tit song: dominant vegetation type, intraspecific competition and interspecific competition with great tits (Parus major). Interspecific competition may result in song convergence or song divergence (hereafter called character shift). The results we obtained are consistent with predictions of the character shift hypothesis: the proportion of songs presenting a different syntax to great tit songs (songs with a trill) increases significantly with relative great tit density. Results do not support predictions of hypotheses concerning song convergence or intraspecific competition. The results are consistent with some of the predictions of the acoustic adaptation hypothesis.