A June 2024 report by the International Seafood Sustainability Foundation (ISSF) assessed global tuna stocks against Marine Stewardship Council (MSC) criteria, revealing that 11 out of 23 major commercial tuna stocks now meet MSC's Principle 1 for sustainable fish stocks, an improvement from eight stocks in March 2023. The report, authored by Paul A. H. Medley and Jo Gascoigne, notes that while seven stocks have fully implemented well-defined harvest control rules, many still fall short due to poor stock status and ineffective harvest control measures. The evaluation is based on publicly available data and adheres to MSC standard 2.01.