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| 据于矢耳石Sr/Ca值的长江日本鳗鲡迁移格局多样性分析(英文) | |
| 作者姓名： | Guo HY Zheng Y Tang WQ Shen H Wei K Xie ZL Tsukamoto K |
| 作者单位： | 1. 上海海洋大学鱼类研究室,上海,201306 2. 复旦大学现代物理研究所,上海,200433 3. 东京大学海洋大气研究所,东京277-8564,日本 |
| 基金项目： | supported by the Chinese National Science Foundation under the Grant(30771650); the Key Programs of Science and Technology Commission Foundation of Shanghai(08391910200); Special Fund for Agroscientific Research in the Public Interest(201203065); Research Fund for the Doctoral Program of Higher Education of China(20070264001); E-class Programs of Shanghai Municipal Education Commission(E03009); the Key Subject Construction of Shanghai(S30701) |
| 摘 要： | 长江口是中国日本鳗鳗苗的主要产区和仅存的成鳗渔业水域。日本鳗自长江河口至上游金沙江近3000km干流及许多支流中都有分布,但其迁移行为却不为人了解。该文分析了2008年9～11月采自长江靖江段(31o30′N,120o42′E)的153尾银色鳗样本的生物学特征,测定了其中27尾标本的矢耳石Sr/Ca值。结果显示,153尾样本中有雌性85尾、雄性68尾,雌雄性比1:0.8。雌性由3～7(平均5.52)龄组成,平均体长(669±80)mm,体重(555±229)g,丰满度1.77±0.22,性腺指数(GSI)1.32±0.31。雄性由3～5(平均4.38)龄组成,平均体长(518±51)mm,体重(234±76)g,丰满度1.62±0.18,GSI0.21±0.11。雌性的这些生物学参数均显著大于雄性(P<0.05)。依据矢耳石线鳗标志轮平均Sr/Ca值(7.99±1.05)×10-3进行判断,有17尾(即62.96%个体)为"淡水型",10尾(即37.04%个体)为"河口型"。16尾雌性中有13尾(即81.25%)为"淡水型",3尾为"河口型"。11尾雄性中仅36.36%为"淡水型",63.64%为"河口型"。对每个生长层组的Sr/Ca值分析表明,雌雄间2龄时无显著差异,但3龄、4龄和洄游龄组都有显著或极显著的差异,预示着2龄时两者的栖息水域比较一致,但后来出现了明显栖息地分化。 |
| 关 键 词： | 矢耳石 年龄组成 生长参数 日本鳗鲡 银色鳗 长江口 |
Behavioral migration diversity of the Yangtze River Japanese Eel, Anguilla japonica, based on otolith Sr/Ca ratios |
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| Guo HY,Zheng Y,Tang WQ,Shen H,Wei K,Xie ZL,Tsukamoto K.Behavioral migration diversity of the Yangtze River Japanese Eel, Anguilla japonica, based on otolith Sr/Ca ratios[J].Zoological Research,2011,32(4):442-450. | |
| Authors: | Guo Hong-Yi Zheng Yi Tang Wen-Qiao Shen Hao Wei Kai Xie Zheng-Li Tsukamoto Katsumi |
| Institution: | GUO Hong-Yi1,ZHENG Yi2,TANG Wen-Qiao1,*,SHEN Hao2,WEI Kai1,XIE Zheng-Li1,Tsukamoto Katsumi3(1.Laboratory of Ichthyolology,Shanghai Fisheries University,Shanghai 200090,China,2.Institute of Modern Physics,Fudan University,Shanghai 200433,3.Atmosphere Ocean Research Institute,University of Tokyo,Tokyo277-8564,Japan) |
| Abstract: | The Yangtze River estuary is the main production area of Anguilla japonica in China,as well as the only existing fishery area for adult eels.Japanese eels are distributed in the main rivers and many tributaries from the Yangtze River estuary to the upper Jinsha River,which extend to nearly 3 000 km.However,their migration behaviors remain relatively unknown.We analyzed the biological characteristics of 153 specimens of silver eels collected from the Jingjiang section of Yangtze River(31o30'N,120o42'E) betwe... |
| Keywords: | Sagitta Age composition Growth parameter Anguilla japonica Silver eel Yangtze River estuary |
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