Tuna fisheries use different types of fishing gears and strategies to catch tunas. All of them have some sort of environmental impact, the most obvious one being the catch of non-tuna species, some of which are highly vulnerable.
This report summarizes some of the main impacts for fisheries that catch the major commercial tunas (albacore, bigeye, bluefin, skipjack and yellowfin).
It also analyzes the environmental scores obtained by different tuna fishery types certified by the Marine Stewardship Council, showing that most of the main fishing methods have some type of impacts on non-tunas, habitats, and ecosystems.
The report then reviews the management measures adopted by RFMOs to mitigate these impacts, and this information is complemented with a description of other conservation measures adopted by ISSF that enable seafood companies and vessels to improve the sustainability of tuna fisheries.
The report PDF was first published in March 2024.
See our related report, ISSF 2025-01: Status of the World Fisheries for Tuna. March 2025.
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