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Atlantic bluefin tuna

Thunnus thynnus

169

Thunnus

Thynnus

Atlantic bluefin tuna

Go to FishBase for more information on Thunnus thynnus / Atlantic bluefin tuna

Tuna

Not used for reduction purposes

Tuna (including billfishes)

36 Tunas, bonitos, billfishes

Endangered (EN)

2011-06-09

http://www.iucnredlist.org/apps/redlist/details/21860/0

This Atlantic species has experienced declines in range and reported catch per unit effort (CPUE) since the 1960s. Although a number of uncertainties exist in the reported data, especially from the Mediterranean region, the best estimates from the most recent 2010 stock assessment indicate that there has been a global decline of between 29% and 51% based on summed spawning stock biomass (SSB) from both the Western and Eastern stocks over the past 21–39 years (three generations, based on a generation length of between seven and 13 years). Pre-exploitation longevity is not known for the Eastern Atlantic, but it is assumed that at one point that this species had a similar longer generation length across its global range. Therefore, this species is estimated to have declined at least 51% over the past three generation lengths (39 years) and is listed as Endangered under Criterion A2. In the Eastern Atlantic stock, current fishing mortality is far above maximum sustainable yield (MSY) and estimated SSB is far below MSY. The Western Atlantic stock has experienced severe declines in the past, is also below MSY, and has not recovered under current fishing regimes. Management of the eastern Atlantic stock is essential to the future of this species, as it represents the majority of this species global population.