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长江刀鲚不同生态型间的某些形态差异
引用本文:程万秀,唐文乔.长江刀鲚不同生态型间的某些形态差异[J].动物学杂志,2011,46(5):33-40.
作者姓名:程万秀  唐文乔
作者单位:上海海洋大学鱼类研究室种质资源发掘与利用教育部重点实验室 上海201306
基金项目:上海市科委重点项目,上海市教委E-研究院项目,上海市重点学科建设项目
摘    要:摘要:为寻找和检验长江刀鲚(Coilia nasus)不同生态型间的形态差异,分析了江苏靖江、上海九段沙、浙江太湖和江西鄱阳湖4个种群906尾样本的脊椎骨数、臀鳍条数和上颌骨长。结果表明,即使是同一种群内的脊椎骨数和臀鳍条数变幅也较大,但均以靖江和九段沙种群的较多,众数分别为81、80和108、109;太湖和鄱阳湖种群...

关 键 词:臀鳍条数  脊椎骨数  上颌骨长  生态型识别  长江  刀鲚
收稿时间:2011/3/28 0:00:00
修稿时间:2011/7/14 0:00:00

Some Phenotypic Varieties between Different Ecotypes of Coilia nasus in Yangtze River
CHENG Wan-Xiu and TANG Wen-Qiao.Some Phenotypic Varieties between Different Ecotypes of Coilia nasus in Yangtze River[J].Chinese Journal of Zoology,2011,46(5):33-40.
Authors:CHENG Wan-Xiu and TANG Wen-Qiao
Institution:Laboratory of Ichthyology, Shanghai Ocean University, Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai 201306, China;Laboratory of Ichthyology, Shanghai Ocean University, Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai 201306, China
Abstract:In order to find and examine morphological differences between different ecotypes of Coilia nasus we measured the maxillary length, counted on vertebrae and anal fin ray by X-ray on 906 samples from four populations collected in Yangtze River Jingjiang in Jiangsu, Jiuduansha in Shanghai, Taihu Lake in Zhejiang, Poyang Lake in Jiangxi, respectively. The number of vertebrae and anal fin ray varied greatly no matter in the same or between different population. The number of vertebrae and anal fin ray were 81, 80, 77, 75 and 108, 109, 100, 98 in Jingjiang, Jiuduansha, Taihu Lake and Poyanghu Lake population, respectively. The ratio of maxillary length/head length in the four populations were 1.067, 1.063, 1.014 and 0.831 on average. ANOVA analysis on the number of vertebrae and ratio of maxillary length/head length indicated there was significant difference between the four populations except that between Jiuduansha and Jingjiang populations. However, the mean of anal fin rays did not showed any significant difference between all the four populations. The identification success rate between migratory population, including Jingjiang and Jiuduansha, with population of Taihu Lake and Poyanghu Lake were 92.9%, 92.8% and 99.5% by Bayes discriminant function. The results of this study indicate that C.brachygnathus and C.nasus taihuensis can be discriminated by some morphological differences although the existing research has agreed in both of them belonging to C. nasus.
Keywords:Anal fin rays  Vertebrae number  Maxillary length  Ecotypes identification  Yangtze River  Coilia nasus
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