Details and resolution on the discrepancy of annual footprint and sum of product of catch at age and weight at age from China, Japan, and Russia
Catch number at age (CAA), Weight at age (WAA), Catch Weight at Age (WCAA) and catch from footprint are important biological data sources for the Chub mackerel stock assessment. It is necessary to clarify their calculation methods and how to solve the problem of catch discrepancy of annual footprint. The causes of discrepancy from China, Japan, and Russia are clarified and resolved to develop catch at age that has minimal discrepancies to the annual footprint from each member.
Document Number
NPFC-2025-TWG CMSA11-WP04
Document Version
1
Agenda Item
Review of data used for stock assessment