Status Report on Tuna

ISSF's Status of the World Fisheries for Tuna report has been updated with the lastest stock assessments for the eastern Pacific Ocean. The report evaluates the biolofical health of the world's 23 commercially fished oceanic tuna stocks. The report identifies which stocks are healthy, those that are in danger of being overfished and stocks that are in an overfished state. The report also rates fishing gears according to their impact on the marine environment. 

This update highlights two important changes in the eastern Pacific Ocean. 


Bigeye's fishing mortality, which is a measure of how much tuna is being taken by fishing compared towhat the population can produce, raised from yellow to orange. The color changed because nations failed to act on scientific recommendations to either lengthen the current fishing closure or establish individual bigeye vessel limits. An orange fishing mortality rating means that fishing intensity is above the fishing mortality at maximum sustainable yield (FMSY) and there are no adequate management measures to end overfishing, or that the measures that are currently in place are insufficient. 


Yellowfin biomass rating changed from orange to green. Biomass refers to the size of a stock left in the ocean. The change from orange to green means that spawning biomass was previously below maximum sustainable yield (MSY), but has improved to be at or above the MSY.

The updated stock status rating update also summarizes the management measure that have been adopted during the past 6 months in the western & central Pacific, eastern Pacific and Indian Oceans. 

To access the report click here