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程万秀,唐文乔.2011.长江刀鲚不同生态型间的某些形态差异.动物学杂志,46(5):33-40.
长江刀鲚不同生态型间的某些形态差异
Some Phenotypic Varieties between Different Ecotypes of Coilia nasus in Yangtze River
投稿时间:2011-03-28  修订日期:2011-07-14
DOI:
中文关键词:  臀鳍条数  脊椎骨数  上颌骨长  生态型识别  长江  刀鲚
英文关键词:Anal fin rays  Vertebrae number  Maxillary length  Ecotypes identification  Yangtze River  Coilia nasus
基金项目:
作者单位E-mail
程万秀 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  
唐文乔 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 wqtang@shou.edu.cn 
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中文摘要:
      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;太湖和鄱阳湖种群的较少,分别为77、75和100、98。上颌骨长/头长也以靖江和九段沙种群的较大,均值为1.067和1.063;太湖和鄱阳湖种群则分别为1.014及0.831。单因素方差分析表明,除了靖江与九段沙种群之间,其他种群间的脊椎骨数和上颌骨长/头长的平均值均有显著或极显著差异;而臀鳍条数均不具有显著的种群差异。洄游型(包含靖江和九段沙)、太湖和鄱阳湖种群的Bayes判别成功率分别达92.9%、92.8%及99.5%,表明现有研究虽已认同短颌鲚(C.brachygnathus)和湖鲚(C.nasus taihuensis)同属于刀鲚,但三者之间还可以依据某些形态特征的组合进行区分。
英文摘要:
      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.
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