| 信江发现溯河洄游型刀鲚的实证研究 |
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| 引用本文： | 卢明杰,姜涛,刘洪波,陈婷婷,杨健.信江发现溯河洄游型刀鲚的实证研究[J].中国水产科学,2015,22(5):978-985. |
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| 作者姓名： | 卢明杰 姜涛 刘洪波 陈婷婷 杨健 |
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| 作者单位： | 1. 上海海洋大学 水产与生命学院, 上海 201306;2. 南京农业大学 无锡渔业学院, 江苏 无锡 214081;3. 中国水产科学研究院 淡水渔业研究中心 院长江中下游渔业生态环境评价和资源养护重点实验室, 江苏 无锡 214081 |
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| 基金项目： | 国家自然科学基金面上项目(31372533). |
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| 摘 要： | 利用电子探针微区分析技术,对2014年8月1日采自江西省余干县瑞洪镇信江(鄱阳湖水系五大河流之一)江段的刀鲚(Coilia nasus)的矢耳石进行了锶和钙的微化学分析研究。元素定量线分析表明,样品的锶钙比值(Sr/Ca×103)波动显著,不仅具有对应淡水生活的低值(Sr/Ca×1033),而且出现了对应于海水生活的高值(3Sr/Ca×1037),显示出其典型的溯河洄游特征。耳石Sr含量的面分析结果与之相同,均具有对应淡水生活的低值(蓝色)区域和海水生活的高值(绿色)区域。这两种耳石微化学类型首次直观地证实,目前距长江河口约1000 km的信江中存在洄游型刀鲚。
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| 关 键 词： | 刀鲚 耳石 电子探针 信江 鄱阳湖 |
| 修稿时间： | 2015/11/7 0:00:00 |
Existence of anadromous Coilia nasus in Xinjiang River of JiangxiProvince as determined by otolith
microchemistry |
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| LU Mingjie,JIANG Tao,LIU Hongbo,CHEN Tingting,YANG Jian.Existence of anadromous Coilia nasus in Xinjiang River of JiangxiProvince as determined by otolith
microchemistry[J].Journal of Fishery Sciences of China,2015,22(5):978-985. |
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| Authors: | LU Mingjie JIANG Tao LIU Hongbo CHEN Tingting YANG Jian |
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| Institution: | 1. College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China;2. Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China;3. Key Laboratory of Fishery Ecological Environment Assessment and Resource Conservation in Middle and Lower Reaches of the Yangtze River, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China |
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| Abstract: | The estuarine tapertail anchovy Coilia nasus (Clupeiformes, Engraulidae) is a highly commercial
migratoryfish species in the Yangtze River. Because of adverse human activities
such as overfishing, C. nasus productionhas sharply declined.
Investigating the large-scale distribution of this fish is very important for
evaluationof its resources and habitat. Previous evidence revealed the
existence of anadromous C. nasus in Poyang Lake; thisstudy was conducted
to confirm whether there is also anadromous C. nasus in the Xinjiang River. An electronprobe microanalyzer was
applied to analyze Sr and Ca microchemistry patterns in otoliths of C. nasus collectedfrom the Ruihong section of the Xinjiang River
(the most distant branch of Poyang Lake, ~1000 km from theYangtze River
estuary) near Yugan County in Jiangxi Province. Line transect results clearly
showed a complexSr/Ca ratio (i.e., Sr/Ca×103) pattern, including low-ratio
freshwater habitat (Sr/Ca×103<3) and high-ratio seawaterhabitat (3<Sr/Ca×103<7),
which clearly demonstrates that the anchovies had experienced anadromous
migration.These two microchemistry patterns verify, for the first time, the
existence of anadromous C. nasus in the XinjiangRiver. Home spawning is
thought to be the main reason for such a long migratory for the anchovy in the
XinjiangRiver, resulting from natural selection for relatively stable spawning
conditions. A 1000-km migratory distancereflects an extremely strong migration
ability of C. nasus, which is a relatively small fish. The anchovies enter
intothe Xinjiang River to visit habitat required for spawning and early life
stages, and there are likely spawninggrounds of anadromous C. nasus in this river. |
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| Keywords: | Coilia nasus otolith electron probe microanalyzer Xinjiang River Poyang Lake |
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