The ISSF's June 2024 report, 'An Evaluation of the Sustainability of Global Tuna Stocks Relative to Marine Stewardship Council Criteria,' indicates that 11 out of 23 major commercial tuna stocks are now avoiding overfishing and maintaining target biomass levels, an improvement from eight stocks in March 2023. Authored by Paul A. H. Medley and Jo Gascoigne, the report underscores the significance of well-defined harvest control rules, with seven stocks having fully implemented these rules. The MSC, an independent organization, certifies fisheries as sustainable if they meet its criteria. The ISSF aims to develop and implement science-based practices and international management measures to help all tuna fisheries achieve and maintain MSC certification standards.