Acoustic divergence in the communication of cryptic species of nocturnal primates (Microcebus ssp.)
Acoustic divergence in the communication of cryptic species of nocturnal primates (Microcebus ssp.)
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DOI：
10.1186/1741-7007-6-19
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发表时间：
2008-05-07
期刊：
影响因子：
5.4
通讯作者：
Zimmermann, Elke
中科院分区：
文献类型：
--
作者：
Braune, Pia;Schmidt, Sabine;Zimmermann, Elke
背景：进化生物学中的一个中心问题是，神秘物种如何在共生领域保持物种凝聚力。共生的神秘物种的共存需要物种特有的信号和识别系统的进化。在夜间活动的、分散的生物物种中，特定的发声被认为是一种理想的捕食隔离机制。研究了灰鼠狐猴(Microcebus Murinus)、金棕鼠狐猴(M.ravelobensis)和古德曼狐猴(M.leHilahytsara)这三种夜间活动、分散生活的小鼠狐猴的雄性广告叫声的结构和感知。结果：多参数声学分析显示，在频率轮廓和广告呼叫时长上存在显著差异。为了测试老鼠狐猴是否对不同物种的叫声做出特定的反应，我们对野外的小狐猴进行了回放实验，使用所有三个物种的广告叫声和警报哨声叫声。个体对同种的反应明显强于对异种的广告叫声，但对统计上相似的三个物种的鸣叫声的反应行为没有差异。结论：我们的结果首次为隐蔽灵长类物种形成的社会呼唤的特定相关性提供了证据。他们进一步支持，信号和识别系统的特定差异代表了一种有效的先行隔离机制，有助于在共生物种中实现物种凝聚力。
Background: A central question in evolutionary biology is how cryptic species maintain species cohesiveness in an area of sympatry. The coexistence of sympatrically living cryptic species requires the evolution of species-specific signalling and recognition systems. In nocturnal, dispersed living species, specific vocalisations have been suggested to act as an ideal premating isolation mechanism. We studied the structure and perception of male advertisement calls of three nocturnal, dispersed living mouse lemur species, the grey mouse lemur (Microcebus murinus), the golden brown mouse lemur (M. ravelobensis) and the Goodman's mouse lemur (M. lehilahytsara). The first two species occur sympatrically, the latter lives allopatrically to them.Results: A multi-parameter sound analysis revealed prominent differences in the frequency contour and in the duration of advertisement calls. To test whether mouse lemurs respond specifically to calls of the different species, we conducted a playback experiment with M. murinus from the field using advertisement calls and alarm whistle calls of all three species. Individuals responded significantly stronger to conspecific than to heterospecific advertisement calls but there were no differences in response behaviour towards statistically similar whistle calls of the three species. Furthermore, sympatric calls evoked weaker interest than allopatric advertisement calls.Conclusion: Our results provide the first evidence for a specific relevance of social calls for speciation in cryptic primates. They furthermore support that specific differences in signalling and recognition systems represent an efficient premating isolation mechanism contributing to species cohesiveness in sympatrically living species.