Morphometric discrimination of wild from farmed Dybowski’s frog (Rana dybowskii) based on hindlimb length

查看全文 作　　者：XIA [1,2]Rui;HUANG Xiao-[4]ming;YANG Shu-[1]hui;XU Yan-[1,2]chun;Ying [1,3]Lu;Thomas D. [5]Dahmer

机构地区：[1]College of Wildlife Resources, Northeast Forestry University, No. 26, Hexing Road, Xiangfang District, Harbin 150040, China;[2]State Forestry Administration Detecting Center of Wildlife, Harbin 150040, China;;[3]College of Life Science, Tarim University, Alaer 843300, China.;[4]Analysis and Testing Center of Qiqihar University, No. 43, WenhuaStreet, Qiqihar 161500, China;[5]Ecosystems Ltd., 2/F Kingsun Computer Bldg., 40, Shek Pai Wan Road,Aberdeen, Hong Kong, China

出　　处：《Journal of Forestry Research》索引2011年第22卷第2期,共6页

基　　金：supported by the Project of Tackling Key Problems of Science and Technology of Heilongjiang Province, China (GB06B205-3);Program of Wildlife Conservation and Breeding of State Forestry Administration of China (2008);Special Fund for Postgraduate Dissertation of Northeast Forestry University (2009) 摘　　要：Commercial farming of anuran species that are declining in the wild raises a need to discriminate wild from farmed frogs.We hypothesized wild frogs might have extended hindlimbs due to greater frequency or intensity of jumping relative to farmed frogs,highlighting a morphometric approach to discrimination of wild from farmed frogs using hindlimb length.In the present study,Dybowski's frog(Rana dybowskii) was used to test this hypothesis.We measured body mass(Mb) and hindlimb length(Lh) of 2-year old farmed frogs and wild frogs aged 2 to 5 years.Dybowski's frog demonstrated significant dimorphism in Mb and Lh.Mb was significantly greater among farmed 2-year old frogs in both sexes(p=0.000),while only among females was Lh significantly greater for wild frogs(p=0.000).Lh/Mb was used as an index for origin discrimination to eliminate the influence of Mb due to variation of husbandry conditions among farms.Mean Lh/Mb for farmed frogs was significantly lower than for wild frogs(p=0.000) in the 2-year old age class.Discrimination correctly classified 84.4% of farmed and 96.3% of wild male frogs.Among females,92.9% of farmed frogs and 90.1% wild frogs were correctly classified.The overall correctness of classification was 92.1% and 90.8% for males and females,respectively.However,Lh/Mb revealed variation with age,resulting in reduced discriminative power for frogs ≥3 years old.We introduced a coefficient Ce to adjust the Lh/Mb of frogs ≥3 years to the level equivalent to 2-year frogs.The adjustment achieved 89.5% for overall correctness of origin for wild males and 92.4% for wild females ≥3 years old.These results show that Lh/Mb is an effective index to discriminate wild from farmed Dybowski's frog.Since the physical demands of jumping are common among anurans,this index is also potentially applicable to other anuran species. 关键词：东北林蛙青蛙野生养殖后肢长度形态基础

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Morphometric discrimination of wild from farmed Dybowski’s frog (Rana dybowskii) based on hindlimb length

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