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Bluefin tuna reveal global patterns of mercury pollution and bioavailability in the world's oceans

Updated: Nov 1, 2021

RESEARCH ARTICLE

PNAS September 21, 2021 118 (38) e2111205118; https://doi.org/10.1073/pnas.2111205118


Bluefin tuna (BFT) is an apex predatory, long-lived, migratory pelagic fish that is widely distributed throughout the world's oceans.


These fish have very high concentrations of neurotoxic methylmercury (MeHg) in their tissues, which increase with age. Our study shows that Hg accumulation rates (MARs) in BFT as a global pollution index can reveal global patterns of Hg pollution and bioavailability in the oceans and further reflect both natural and anthropogenic emissions and regional environmental features.


Bluefin tuna (BFT), highly prized among consumers, accumulate high levels of mercury (Hg) as neurotoxic methylmercury (MeHg).



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