Development and evaluation of bycatch mitigation measures in tuna longline fishery
2013
Yokota, K. (Marine Fisheries Research and Development Center, Fisheries Research Agency, Yokohama (Japan))
There is a growing need for ecosystem-based fisheries management. Proper assessment and management of the impacts of fisheries on non-target (bycatch) species are required. Scientists have conducted various research and development to solve the issues in the interaction of tuna longline fisheries with the bycatch species worldwide. Recently, tunas Regional Fisheries Management Organizations (RFMOs) have implemented Conservation and Management Measures (CMMs) for bycatch species (e. g., seabirds and sea turtles). In Japan, the author have developed and evaluated various mitigation measures for reducing bycatch and/or mortality of seabirds and sea turtles in tuna longline fishery. The present paper introduces several approaches of the bycatch mitigation measures (tori line and side setting for seabirds, and circle hook, bait modification and de-hooking device for sea turtles) based on fishing gear technology, highlighting some interesting topics.
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