Skeletochronological Study of Age,Longevity and Growth in a Population of Rana nigromaculata(Amphibia:Anura) in Sichuan,China  

作　　者：Min MAO Yan HUANG Zhiping MI Yanhong LIU Caiquan ZHOU 

机构地区：[1]Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education),China West Normal University [2]Institute of Rare Animals and Plants,China West Normal University

出　　处：《Asian Herpetological Research》2012年第3期258-264,共7页亚洲两栖爬行动物研究（英文版）

基　　金：Financial support was provided by the Foundation of Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education)

摘　　要：A skeletochronological study was conducted for the age, longevity and growth of a Rana nigromaculata population in northeastern Sichuan, China. Of 139 specimens, 119(68 males and 51 females) exhibited distinct arrested growth lines in phalanges. Age at first reproduction was found to be two years of age for males and three for females. Maximum longevity was estimated to be at least six years in males and seven years in females. Average age did not differ between males and females. Breeding females were significantly older than breeding males. Females were larger in body size and heavier in body mass than males. Age was not correlated with body size and body mass in males, but a significant correlation was found among age, body size and body mass in females. The growth curve appeared significantly different between the sexes, with a higher growth rate throughout life and a larger asymptotic size in females. Moreover, analysis of the growth model indicated that the population studied was relatively stable.A skeletochronological study was conducted for the age, longevity and growth of a Rana nigromaculata population in northeastern Sichuan, China. Of 139 specimens, 119(68 males and 51 females) exhibited distinct arrested growth lines in phalanges. Age at first reproduction was found to be two years of age for males and three for females. Maximum longevity was estimated to be at least six years in males and seven years in females. Average age did not differ between males and females. Breeding females were significantly older than breeding males. Females were larger in body size and heavier in body mass than males. Age was not correlated with body size and body mass in males, but a significant correlation was found among age, body size and body mass in females. The growth curve appeared significantly different between the sexes, with a higher growth rate throughout life and a larger asymptotic size in females. Moreover, analysis of the growth model indicated that the population studied was relatively stable.

关 键 词：age structure Rana nigromaculata POPULATION SKELETOCHRONOLOGY 

分 类 号：Q958.1[生物学—动物学]