Tuna species —especially skipjack, yellowfin, bigeye and albacore — are a valuable food source for millions of people and fundamental to the global economy. In 2019, the catch of major commercial tuna stocks totaled about 5.3 million tonnes. Tuna also are integral to the health of the greater marine ecosystem.
We provide data, best-practices recommendations, and other expertise to help vessels, seafood companies, non-governmental organizations (NGOs), RFMOs and government agencies keep tuna stocks at sustainable levels.
Understanding the health of the tuna stocks on which the world relies is a critical first step to promoting tuna conservation globally.
Each year, ISSF publishes the Status of the Stocks Report, which provides a comprehensive analysis of tuna stocks by species. This report, reviewed by the Scientific Advisory Committee, informs our research and advocacy priorities.
We also publish a report that uses the Marine Stewardship Council (MSC) scoring system to evaluate 23 stocks of tropical and temperate tunas throughout the world. It also evaluates the management systems of the RFMOs associated with these stocks.
ISSF establishes tuna conservation measures for participating seafood companies and vessels on our ProActive Vessel Register and audits their compliance with the measures every year. Download an infographic of current ISSF conservation measures.
Our research findings inform our conservation measures. For example, the overfishing of a particular tuna species may spur at-sea research to test technical methods to manage the catch of the species. Then, as the health of the stock demands, we may advocate for specific conservation measures for a particular tuna species at the RFMO level.
In addition to hosting in-person workshops with tuna skippers, we offer video workshops, guidebooks and species identification guides, and other resources for sustainable fishing for vessel owners and crew.
While all tuna RFMOs have made progress to develop harvest strategies for the stocks they manage, none have fully implemented them except for one stock. ISSF’s science and advocacy experts urge all tuna RFMOs to adopt stock-specific limit and target reference points and HCRs.
Use our interactive data-visualization tool to create and then download or share graphics on tuna stock status.
You can visualize data on 23 commercial tuna stocks (by species and ocean area) share of total catch and trends in stock health.