Occurrence of sea eels of Anguilla japonica along the Sanriku Coast of Japan
Occurrence of sea eels of Anguilla japonica along the Sanriku Coast of Japan
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DOI：
10.1007/s102280300011
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发表时间：
2003-02-25
影响因子：
1.2
通讯作者：
Miyazaki, N
中科院分区：
文献类型：
--
作者：
Arai, T;Kotake, A;Miyazaki, N
通过耳石微观结构和锶 (Sr) 和钙 (Ca) 浓度分析，对沿日本三陆海岸采集的日本鳗鱼 (Anguilla japonica) 的年龄和迁徙历史进行了检查。从鳗鱼标记到耳石边缘的平均 Sr:Ca 比率表明，鳗鱼具有几种一般类别的迁徙历史，包括从未进入淡水的海鳗和其他短暂进入淡水但返回河口或海湾的鳗鱼。这个北部地区出现海鳗的第一个证据表明，三陆海岸的日本鳗鱼不一定会迁移到淡水河流中。
The age and migratory history of the Japanese eel, Anguilla japonica, collected along the Sanriku Coast of Japan, were examined using otolith microstructure and analysis of strontium (Sr) and calcium (Ca) concentrations. The mean Sr: Ca ratios from the elver mark to the otolith edge indicated that there were eels with several general categories of migratory history, including sea eels that never entered freshwater and others which had entered freshwater for brief periods but returned to the estuary or bay. This first evidence of the occurrence of sea eels in this northern area indicates that Japanese eels of the Sanriku Coast do not necessarily migrate into freshwater rivers.