Dispersal Characteristics and Pathways of Japanese Glass Eel in the East Asian Continental Shelf
Dispersal Characteristics and Pathways of Japanese Glass Eel in the East Asian Continental Shelf
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DOI：
10.3390/su11092572
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发表时间：
2019-05-01
期刊：
影响因子：
3.9
通讯作者：
Kimura, Shingo
中科院分区：
文献类型：
--
作者：
Han, Yu-San;Hsiung, Kuan-Mei;Kimura, Shingo
日本鳗鲡（Anguilla japonica）是日本、中国、韩国和台湾等东亚国家的重要水产养殖鱼类。所有的玻璃鳗鱼鱼苗都是从野外捕获的，了解玻璃鳗鱼的招募模式很重要。A.在北赤道流、黑潮、黑潮入侵流和沿岸流的共同作用下，日本近海鱼类被被动输送到东亚大陆架。在每个地方，招募时间是不同的：在台湾是11月，在鸭绿江是4月。玻璃鳗鱼如何到达招募区域仍然知之甚少。在这里，我们结合联合收割机的信息，从幼虫年龄的基础上耳石增量，模拟漂流路径在东亚大陆架上，在东亚每个位置的主要捕鱼季节。我们识别出五个主要的补充块：（1）黑潮主体，（2）台湾海峡暖流，（3）台湾暖流，（4）黄海暖流和（5）黄海暖流分支。计算年龄的玻璃鳗鱼是显着低估了后来的新兵，可能是由于在低水温下的耳石边缘的增长停止。本研究阐明了东亚大陆架鳗鲡幼体的特征和迁移机制，为研究其在海洋阶段的补充动态提供了重要信息。
The Japanese eel Anguilla japonica is an important aquaculture fish species in the East Asian countries of Japan, China, Korea, and Taiwan. All glass eel fry are captured from the wild and understanding the recruitment patterns of the glass eel is important. The larvae of A. japonica are passively transported to the East Asian Continental Shelf by the North Equatorial Current, the Kuroshio, the Kuroshio intrusion currents, and coastal currents. In each location, recruitment time is diverse: It is November in Taiwan and April in the Yalu River. How the glass eels reach recruitment areas remains poorly understood. Here, we combine information from larval ages based on otolith increments, simulated drifting paths on the East Asian Continental Shelf, and main fishing seasons in each location of East Asia. We identify five main recruitment blocks: (1) The main Kuroshio, (2) The Taiwan Strait Warm Current, (3) The Taiwan Warm Current, (4) The Yellow Sea Warm Current and (5) The branch of Yellow Sea Warm Current. The counted age of the glass eels is significantly underestimated for the later recruits, possibly due to the cessation of the otolith edge growth under low water temperatures. This study clarifies the eel's larval characteristics and transport mechanisms in the East Asia Continental Shelf, providing important information for its recruitment dynamics in the marine stage.