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元江水系越鳠年龄鉴定材料的比较
引用本文:田志福,张家波,朱邦科,杜孝田.元江水系越鳠年龄鉴定材料的比较[J].淡水渔业,2010,40(4).
作者姓名:田志福  张家波  朱邦科  杜孝田
作者单位:华中农业大学水产学院,武汉,430070
摘    要:分析比较了元江越鳠(Mystus pluriradiatus)不同年龄鉴定材料的鉴定结果。结果显示:微耳石磨片、星耳石和脊椎骨材料为鉴定元江越鳠年龄的可利用材料,矢耳石细小且脆不适合用于越鳠的年龄鉴定。微耳石磨片和星耳石的年龄判别能力最高,均达到96.0%,脊椎骨的年龄判别能力为93.3%;最大年龄读数出现在微耳石磨片和脊椎骨上,读数为5+龄;微耳石磨片的同一鉴定者两次独立年龄读数的吻合率最高为94.5%、脊椎骨次之为91.7%、星耳石最低为88.1%;两种年龄材料读数之间的吻合率比较中,微耳石磨片与星耳石的吻合率较高为90.9%,两者的年龄读数在低龄组时吻合较好,微耳石磨片与脊椎骨的吻合率为89.3%,3+龄以上时二者的年龄读数吻合率高。结果表明,鉴定低龄个体选择星耳石材料(n+龄≤3+龄),高龄个体用微耳石磨片进行辅助鉴定的年龄鉴定方法对元江越鳠进行年龄鉴定较为准确。

关 键 词:越鳠(Mystuspluriradiatus)  年轮特征  微耳石  星耳石  脊椎骨

Comparison on age material of Mystus pluriradiatus in Yuanjiang River
TIAN Zhi-fu,ZHANG Jia-bo,ZHU Bang-ke,DU Xiao-tian.Comparison on age material of Mystus pluriradiatus in Yuanjiang River[J].Freshwater Fisheries,2010,40(4).
Authors:TIAN Zhi-fu  ZHANG Jia-bo  ZHU Bang-ke  DU Xiao-tian
Institution:TIAN Zhi-fu,ZHANG Jia-bo,ZHU Bang-ke,DU Xiao-tian(College of Fisheries,Huazhong Agriculture University,Wuhan 430070)
Abstract:Mystus pluriradiatus is an economically important local aquatic animal in Yuanjiang River,China.The aim of the present study was to find a precise and easy method to estimate the age of M.pluriradiatus,by comparing the interpretability and agreement of age readings derived from a suite of calcified structures(lapillus,sagitta,asteriscus and vertebra).Among these calcified structures,the lapillus,the asteriscus and the vertebra are available material,while the sagitta is not.The largest age is 5+ years old o...
Keywords:Mystus pluriradiatus  annuli characteristics  lapillus  vertebra  asteriscus  
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