Sex differences in anogenital distances and digit ratios in wild David＇s rock squirrels Sciurotamias davidianus  

作　　者：Dapeng ZHAO Zhuoyue CHEN Baoguo LI 

机构地区：[1]Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387,China [2]College of Life Sciences, Northwest University, Xi'an 710069, China

出　　处：《Current Zoology》2014年第2期180-185,共6页动物学报（英文版）

摘　　要：The prenatal hormonal environment plays an important role in organizing sex differences in the morphology, physiology and behavior of humans as well as other vertebrates. Currently, all related research on rodents has been focused on Myomorpha. This study presents data on sex differences in the anogenital distance （AGD） and the ratio of the second to the fourth digit length （2D：4D） from 44 wild David＇s rock squirrels Sciurotamias davidianus captured from the Qinling Mountains, China. This was the first study of a species from Sciuromorpha. The AGD as well as body mass are sexually dimorphic. There are no sex differences or lateral asymmetry in 2D：4D. Significant correlation was not found between AGD and 2D：4D for any paw. The findings indicate that 2D：4D may not be fixed or influenced by the prenatal steroidal environment in David＇s rock squirrels [Current Zoology 60 （2）： 180-185, 2014].

关 键 词：Anogenital distance 2D：4D Seiurotamias davidianus Sex dimorphism 

分 类 号：Q959.841[生物学—动物学] S792.189[农业科学—林木遗传育种]