横断山区高山姬鼠臼齿特征的研究
Characteristics of the Molars of Apodemus chevrieri from Hengduan Mountain Region

中文摘要：高山姬鼠 Apodemus chevrieri分布在横断山及其附近地区。臼齿在动物的生存和生态适应中起着重要的作用。为探讨横断山环境对高山姬鼠臼齿表型变异的影响,本研究采用几何形态测量法对横断山由北到南(东北:巴塘;中部:中甸和宁蒗;南部:景东)分布的高山姬鼠的上臼齿(第一上臼齿、第二上臼齿、第三上臼齿)和下臼齿(第一下臼齿、第二下臼齿、第三下臼齿)进行测量,并进行主成分分析、薄片样条分析和多维尺度分析。研究结果表明,横断山高山姬鼠各地理种群间的臼齿有一定形态变异,薄片样条法分析显示各臼齿齿叶间有一定的形变发生,这可能与高山姬鼠在横断山各地区生存环境有关。
英文摘要： Apodemus chevrieri normally distributes in Hengduan Mountain region. Molars play an important role in the survival and adaptation of animal in specific environment. In order to investigate the effect of environmental resources on molar phenotype of A. chevrieri in Hengduan Mountain region, morphological characteristics (upper first molar, upper second molar, upper third molar, lower first molar, lower second molar and lower third molar in A. chevrieri) were measured and analyzed by geometric morphometric techniques, principal components analysis, discriminant analysis, thin plate spline and multidimensional scaling analysis. The results showed that morphological characteristics of molars were different between A. chevrieri groups from Hengduan Mountain region, and this might be due to the different environmental resources. 2015,(): 656-662 收稿日期：2014-8-27 DOI：10.11984/j.issn.1000-7083.20140375 分类号：Q959.837 基金项目：国家国际科技合作专项项目(2014DFR31040);十二五规划支撑项目(2014BAI01B00);国家自然科学基金项目(No.31260097, No.31360096);云南省应用基础研究计划重点项目(No.2013FA014) 作者简介：章迪(1989-),男,硕士研究生,主要从事动物生理生态学研究,E-mail:13759122057@163.com *通讯作者：朱万龙,E-mail:zwl_8307@163.com 参考文献： Cardini A, Hoffmann RS, Thorington RW. 2005. Morphological evolution in marmots (Rodentia, Sciuridae):size and shape of the dorsal and lateral surfaces of the cranium[J]. Journal Zool Syst Evolutionary Res, 43(3):258-268. Caumul R, Poll PD. 2005. Phylogenetic and environmental components of morphological variation:skull, mandible and molar shape in marmots (Marmota, Rodentia)[J]. Evolution, 59(11):2460-2472. Evans AR, Sanson GD. 2003. The tooth of perfection:functional and spatial constraints on mammalian tooth shape[J]. Biol J Linn Soc Lond, 78:173-191. Evans AR. 2005. Connecting morphology, function, and tooth wear in microchiroperans[J]. Biol J Linn Soc Lond, 85:81-96. Figueirido B, Palmqvist P, Perez-Claros JA. 2009. Ecomorphological correlates of craniodental variation in bears and paleobiological implications for extinct taxa:an approach based on geometric morphometrics[J]. Journal of Zoology, 277:70-80. Godfrey LR, Semprebon GM, Jungers WL, et al. 2004. Dental use wear in extinct lemurs:evidence of diet and niche differentiation[J]. J Hum Evol, 47:145-169. Heidi S, Polly PD, Jonathan DK, et al. 2009. Differential sexual