Proposed expansion of research block 48.6_4 for more reliable stock assessment

At WG-SAM-15, Japan indicated it would submit a revised proposal on the design of research block 48.6_4 to WG-FSA-15. Here we propose the westward expansion of the research block along the continental shelf-slope to promote sufficient utilization of the catch limit, which would enable us to complete planned research and support a more reliable stock assessment. The revised design may also contribute to detecting tagged fish that had moved out of research block 48.6_4 to the continental slope/shelf.