Review of Japan’s approaches to reduce bycatch of juvenile bigeye tuna by purse seine on FADs in tropical area of the western and central Pacific Ocean [EB WP 15] Keisuke Satoh ... [et al.]
Material type: ArticlePublication details: [Pohnpei, Federated States of Micronesia] Western and Central Pacific Fisheries Commission (WCPFC) 2012Description: [8 p.] ill. 30 cmSubject(s): DDC classification:- 639.27783
Current library | Call number | Status | Date due | Barcode | |
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SPC Special Collections | SPC 639.277 83 WES 2012 | Available |
"WCPFC-SC8-2012/ EB-WP-15"
Not published by the SPC
Includes bibliographical references
"Japanese approaches to mitigate bycatch of juvenile bigeye tuna by purse seine on FAD in the western and central Pacific Ocean in recent years are reviewed. These attempts are collaborative works between Japanese fishery industry, Fishery Research Agency of Japan and Japanese government, which are corresponding to CMM2008-01 Paragraphs 25 and 26 (Juvenile Tuna Catch Mitigation Research). Almost of works intended to reduce bigeye bycatch on FAD by improving fishing methods and equipment. We applied new fishing methods on FADs operation, such as various depths of underwater structures of FAD, multiple FADs in one operation, signals of acoustic or illumination to control movement of tuna forage relative to FAD. Purse seine with large mesh size have been used in the fishing ground supposed that the large mesh to induce escape of small fish. Recently developed broad spectrum sonar was also tested, which intend to identify tuna species and estimate fish size before a fishing operation. Effect for reducing bigeye tuna of these attempts were tested by analyses of fishery statistics, through field examinations using net pen and field researches in the fishing grounds conducted by commercial fishing vessels and research vessels. We also investigated the relationship between bigeye tuna catch and oceanological conditions, and studied on relationship between school type and juvenile tuna catch. The results of these studies are cited in this document for easy to overview."