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背条螳臂树蛙鸣声的繁殖性状替代
Reproductive Character Displacement in the Call of Chiromantis doriae
杨悦,蔡炎林,李红杰,赵龙辉,唐业忠,崔建国
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作者单位:1. 中国科学院成都生物研究所,成都610041; 2. 中国科学院大学, 北京100049; 3. 四川师范大学, 生命科学学院, 成都610101
中文关键字:繁殖性状替代;种间干扰;声音通讯;背条螳臂树蛙;侧条费树蛙
英文关键字:reproductive character displacement, sound communication, interspecific interference, Chiromantis doriae, Feihyla vittata
中文摘要:繁殖性状替代是指为减弱种间的繁殖干扰而产生的性状进化的现象。重叠分布的物种间通过繁殖性状的分化降低繁殖干扰,维持种间界线,是物种应对种间繁殖干扰的重要策略之一。无尾两栖类的求偶/择偶过程主要依赖声音通讯,本研究以声音通讯为手段研究背条螳臂树蛙Chiromantis doriae鸣声的繁殖性状替代的过程和机制。背条螳臂树蛙和侧条费树蛙Feihyla vittata分别属于树蛙科 Rhacophoridae螳臂树蛙属Chiromantis和费树蛙属Feihyla,但二者形态特征相似、繁殖期重叠、鸣声频率接近、求偶信号彼此遮蔽,因此二者间存在一定程度的繁殖干扰。选取背条螳臂树蛙为研究对象,对同域/异域背条螳臂树蛙的 鸣声特征进行比较分析。结果表明,背条螳臂树蛙的求偶鸣声平均包含4~8音节,对鸣声提取8项声音特征参数进行主成分分析,得到3个主成分。混合线性模型分析结果表明,其中与反映时域特征及调频特征的主成分RC3在同域/异域分布的种群间存在显著差异,而另2个主成分在同域/异域分布的种群间不存在显著差异。为比较同域/异域种群间的音节特征,对音节主频、音节时长和音节间隔3个参数进行混合线性模型分析,结果表明,音节主频和音节时长在同域/异域种群间存在显著差异,音节间隔在同域/异域种群间无显著差异。总体而言,同域分布的背条螳臂树蛙鸣声频率更低、时长更长、调频更明显,有助于拉大与侧条费树蛙主频高、时长短的单音节鸣声间的差异。背条螳臂树蛙在鸣声特征上存在繁殖特征替代现象,证明非近缘物种也可产生繁殖性状替代,拓展了繁殖性状替代的范围。
英文摘要: Reproductive character displacement is the process by which traits evolve in response to selection to lessen reproductive interactions between species. It is one of the strategies for sympatric species to deal with interspecies reproductive interference by diverse reproductive traits and maintaining the species boundary. Anuran mainly relies on sound communication for breeding. In this research, we studied reproductive character displacement of the call of Chiromantis doriae. C. doriae and Feihyla vittata belong to different genus in Rhacophoridae, respectively. But they are similar in morphology, male call spectral characteristics, breeding seasons and breeding micro-environments morphological characteristics which indicate reproductive interference to some extent. We chose C. doriae as the research object, compared the call parameters of sympatric and allopatric C. doriae. Courtship call of C. doriae contains 4 to 8 notes generally. We obtained three principal components from principal component analysis of eight call parameters. Mixed linear model analyses show that the RC3 which related to temporal cues and frequency modulation is significantly different between sympatric and allopatric population, the other two principal components show nonsignificant. In note parameters, mixed linear model analyses of sympatric and allopatric population show that note main frequency and note duration are significantly different and there is no significant difference in note interval. In general, sympatric population has lower domain frequency, longer duration and more obvious frequency modulation than allopatric population. It will help sympatric C. doriae to enlarge the discrepancy between conspecific signal and monosyllabic call of F. vittata with high dominant frequency, short duration. Our results demonstrate reproductive character displacement exist in the sound communication of C. doriae, which means we expand the range of reproductive character displacement by prove species which not close related can also rise to the process.
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国内统一连续出版物号:51-1193/Q |国际标准出版物号:1000-7083
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