Eulemur, me lemur: the evolution of scent-signal complexity in a primate clade
Eulemur, me lemur: the evolution of scent-signal complexity in a primate clade
复制标题
DOI：
10.1098/rstb.2011.0225
复制
发表时间：
2012-07-05
影响因子：
6.3
通讯作者：
Drea, Christine M.
中科院分区：
文献类型：
--
作者：
delBarco-Trillo, Javier;Sacha, Caitlin R.;Drea, Christine M.
在语音交流中，信号的复杂性与社会的复杂性联系在一起，而不是在化学交流中。为了解决这一差距，我们研究了八种欧拉莫尔族雄性和雌性腺体分泌物的化学复杂性。在这个不同的大型灵长类动物分支中，物种在社会或交配系统和优势结构上有所不同。将主成分分析和线性判别分析应用于气相色谱/质谱仪获得的数据。除了腺体类型、性别、季节和物种对化学信号的显著影响外，我们还发现了社会变量和系统发育的影响。值得注意的是，多雌多雌物种的雌性气味比成对结合物种的雌性气味更复杂，而共显性物种的雄性气味比雌性优势物种的化学气味更复杂。此外，传统的性别二型性，即男性信号复杂性超过女性，存在于共显性物种中，但在女性优势物种中则相反。最后，物种之间的成对化学距离和它们成对的系统发育距离之间的正相关关系支持一种渐进但相对较快的信号进化模式。我们认为，比较方法可以成为嗅觉研究的有力工具，揭示与理解当前信号效用和进化过程相关的物种差异。特别是，狐猴的社会复杂性可能是因为嗅觉复杂性而选择的。
Signal complexity has been linked to social complexity in vocal, but not chemical, communication. To address this gap, we examined the chemical complexity of male and female glandular secretions in eight species of Eulemur. In this diverse clade of macrosmatic primates, species differ by social or mating system and dominance structure. We applied principal component and linear discriminate analyses to data obtained by gas chromatography/mass spectrometry. Beyond the significant effects on chemical signals of gland type, sex, season and species, we found effects of social variables and phylogeny. Notably, female odours were more chemically complex in multimale-multifemale species than pair-bonded species, whereas male odours were more chemically complex in codominant species than female-dominant species. Also, the traditional sexual dimorphism, whereby male signal complexity exceeds that of females, was present in codominant species, but reversed in female-dominant species. Lastly, a positive relationship between the species' pairwise chemical distances and their pairwise phylogenetic distances supported a gradual, but relatively fast mode of signal evolution. We suggest that the comparative method can be a powerful tool in olfactory research, revealing species differences relevant to the understanding of current signal utility and evolutionary processes. In particular, social complexity in lemurs may have selected for olfactory complexity.