Sex differences in anogenital distances and digit ratios in wild David’s rock squirrels Sciurotamias davidianus | Zendy

Dapeng Zhao | Zendy; Zhuoyue Chen | Zendy; Baoguo Li | Zendy

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

Author(s) -

Dapeng Zhao,

Zhuoyue Chen,

Baoguo Li

Publication year - 2014

Publication title -

current zoology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.971

H-Index - 38

eISSN - 2058-5888

pISSN - 1674-5507

DOI - 10.1093/czoolo/60.2.180

Subject(s) - digit ratio , anogenital distance , sexual dimorphism , zoology , biology , testosterone (patch) , ecology , endocrinology , genetics , fetus , pregnancy , in utero

The prenatal hormonal environment plays an important role in organizing sex differences in the morphology, physi- ology and behavior of humans as well as other vertebrates. Currently, all related research on rodents has been focused on Myo- morpha. 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 (Cur- rent Zoology 60 (2): 180-185, 2014).

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