Age Structure of Two Species of Odorous Frogs(Odorrana margaretae and Odorrana grahami)  

作　　者：LIANJU YUAN MAOJUN ZHONG WENBO LIAO 

机构地区：[1]Key Laboratory of Southwest China Wildlife Resources Conservation(Ministry of Education),China West Normal University,Nanchong 637009,Sichuan,China [2]Key Laboratory of Artificial Propagation and Utilization in Anurans of Nanchong City,China West Normal University,Nanchong 637009,Sichuan,China [3]Institute of Eco-adaptation in Amphibians and Reptiles,China West Normal University,Nanchong 637009,Sichuan,China

出　　处：《Asian Herpetological Research》2021年第3期308-314,共7页亚洲两栖爬行动物研究（英文版）

基　　金：Financial support was provided by the National Natural Sciences Foundation of China(Nos.31772451,31970393);the Science and Technology Youth Innovation Team of Sichuan Province(2019JDTD0012)。

摘　　要：Variation in age structure and body size benefits are identified to understand the evolution of life history.Here,we estimated the age structure and body size of two species of odorous frogs(Odorrana margaretae and Odorrana grahami)by using skeletochronology.The ages at sexual maturity of O.grahami and O.margaretae in both sexes were 1 and 2 years,respectively.For both sexes,the maximum age observed in O.margaretae was six years.For O.grahami,the maximum age observed in males and females were 4 and 5 years,respectively.Males and females did not differ in mean age in the two species.The average body size of both species considerably differed between sexes,with females being larger than males.The body size of females was also larger than that of males when the effect of age was removed.We also found positive correlations between body size and age within each sex in O.margaretae,but only for female in O.grahami.The female-biased sexual size dimorphism of the two species suggested that fecundity selection for larger female size may increase the reproductive output.

关 键 词：age structure body size odorous frogs SKELETOCHRONOLOGY 

分 类 号：Q958[生物学—动物学]