大洋性鱼类
- 【水产】oceanic fishes
大洋性鱼类-
金枪鱼是洄游于公海和沿海国家200海里经济专属水域的大洋性鱼类。
Tuna is a species of marine fish which migrates in the high seas and coastal countries'exclusive economic waters of200 nautical miles .
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高度洄游的大洋性金枪鱼类（Scombridae）是世界远洋渔业的重要捕捞对象，中国金枪鱼生产仍处于初期发展阶段，因此研究和预测金枪鱼渔场具有重要的现实意义。
Highly migration tuna is one of the most important fishing objects of high sea fisheries of the world . At present , the tuna fishery of China is at the primary development period , and it is practically significant to engage in forecasting and studying on tuna fishing grounds .
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主要捕捞对象是大洋性金枪鱼类资源，主要捕捞工具是延绳钓，但是延绳钓在捕捞金枪鱼类的同时，兼捕相当多的上层鲨鱼。
Pelagic tunas are main target species and sharks as by-catch .