Yoshimi Takao

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Study on the methods to mitigate the bycatch of juvenile bigeye tuna by introducing Double-FADs with light stimulus for tuna purse seine fishery in the Western and Central Pacific Ocean 1 Study on the methods to mitigate the bycatch of juvenile bigeye tuna by introducing Double-FADs with light stimulus for tuna purse seine fishery in the Western and Central(More)
Target strength (TS) of fish is important in order to convert acoustic integration values obtained by acoustic survey into estimates of fish abundance. A large indoor tank has been used in underwater acoustics experiments such as measurements of the target strength pattern of fish. It was equipped with an electric flatcar for the purpose of loading and(More)
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(More)
newly measured data using captive tuna. ABSTRACT For the acoustic species discrimination, broadband response of three tuna species, bigeye tuna, yellowfin tuna and skipjack tuna were measured by a broadband split beam sonar system. Each species was kept in an enclosure separately. Ultrasonic broadband sound (70 kHz-140kHz) was projected nearly horizontally(More)
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