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首页> 外文会议>OCEANS - MTS/IEEE Kobe Techno-Oceans >Study of Remaining and Migration of Skipjack Tuna in Waters Around Yonaguni Island, Okinawa, Japan
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Study of Remaining and Migration of Skipjack Tuna in Waters Around Yonaguni Island, Okinawa, Japan

机译：日本冲绳与那国岛周围水域of鱼的残留和迁移研究

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摘要

We conducted an investigation for remaining period and behavioral ecology of skipjack tuna (Katsuwonus pelamis) around the fish aggregating devices (FADs) in the sea near Yonaguni Island, Okinawa, Japan. Skipjack is known that it is altitude migratory fish and stays around an island and artificial fishing reefs [1]. The knowledge concerning skipjack ecology and behavior are still poor and the reasons for staying around FADs are unknown. Investigation of migratory fish has a wide movement range and it is difficult to track continuously long-term. For this reason, a method of attaching a data logger directly to a fish body and measuring behavior are mainstream. However, since this method requires recapture of fish for the data collection, the data collection rate is extremely low. In this study, we tried long-term research and improvement of data recovery rate using ultrasonic biotelemetry system and FADs dotted in the sea near Yonaguni Island, Okinawa, Japan. As a result of the investigation, it was possible to confirm received signals of 71 individuals out of the 181 individuals released. And it became clear that many of the received skipjacks stayed more than 10 days and stayed in the sea near Yonaguni Island. Furthermore, we were able to obtain about the migration between FADs and the diurnal behavior around the FADs.
机译：我们对日本冲绳县与那国岛附近海域鱼类聚集装置（FAD）周围的skip鱼（Katsuwonus pelamis）的剩余时间和行为生态进行了调查。 p鱼被称为高海拔fish游鱼类，并留在岛上和人工鱼礁周围[1]。关于skip鱼生态学和行为的知识仍然很贫乏，在FAD周围停留的原因尚不清楚。移栖鱼类的调查活动范围广，难以长期连续追踪。因此，将数据记录器直接连接到鱼身上并测量行为的方法是主流。但是，由于该方法需要重新捕获鱼类以进行数据收集，因此数据收集率极低。在这项研究中，我们尝试了长期研究并使用超声生物遥测系统和在日本冲绳Yonaguni岛附近海中点缀的FAD来改善数据恢复率。调查的结果是，可以确认所释放的181个人中有71个人收到了信号。很明显，许多收到的skip鱼在Yonaguni岛附近的海中停留了十天以上。此外，我们能够获得FAD之间的迁移以及FAD周围的昼夜行为。

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