Age Structure of Females in a Breeding Population of Echinotriton chinhaiensis(Caudata:Salamandridae) and Its Conservation Implication  

作　　者：Weizhao YANG Chang LIU Jianping JIANG Cheng LI Feng XIE 

机构地区：[1]Chengdu Institute of Biology,Chinese Academy of Sciences [2]The Graduate University of Chinese Academy of Sciences

出　　处：《Asian Herpetological Research》2011年第2期91-96,共6页亚洲两栖爬行动物研究（英文版）

基　　金：supported by the National Natu-ral Science Foundation of China(30770316)

摘　　要：Knowledge of life history is important for understanding possible connections to population declines. Here, we investigated the female age structure and fecundity of Echinotriton chinhaiensis, one of the most endangered salamanders in the world, using skeletochronology based on specimens collected in 2008 and 2009 from a population in Ruiyansi, northeast of Ningbo, Zhejiang, China. The results showed that most female salamanders were between 5 and 6 years of age, with the minimal reproductive age, predicted to be 3 years, and the clutch size correlated to the body size. We argue that both delayed attainment of sexual maturity and low fecundity make this species more vulnerable to extinction.Knowledge of life history is important for understanding possible connections to population declines. Here, we investigated the female age structure and fecundity of Echinotriton chinhaiensis, one of the most endangered salamanders in the world, using skeletochronology based on specimens collected in 2008 and 2009 from a population in Ruiyansi, northeast of Ningbo, Zhejiang, China. The results showed that most female salamanders were between 5 and 6 years of age, with the minimal reproductive age, predicted to be 3 years, and the clutch size correlated to the body size. We argue that both delayed attainment of sexual maturity and low fecundity make this species more vulnerable to extinction.

关 键 词：SKELETOCHRONOLOGY age structure sexual maturity FECUNDITY clutch size 

分 类 号：Q958[生物学—动物学]