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How Michael Phelps' diet might explain why mercury levels are rising in tuna

By newadmin / Published on Thursday, 08 Aug 2019 03:00 AM / Comments Off on How Michael Phelps' diet might explain why mercury levels are rising in tuna / 58 views


Mercury levels in popular fish — including tuna, salmon and swordfish — are rising, and climate change and overfishing may be to blame, a new study suggests.

That mercury levels would increase in fish is counterintuitive, given that government regulations have driven down the amount of mercury found in the air and the oceans over the past few decades.

“You would expect that as mercury was reduced in seawater, then it would go down in all the fish,” said the study’s lead author, Amina Schartup, who was a research associate at the Harvard School of Engineering and Applied Sciences when working on the study. “But there was variability. We were trying to tease out the different factors contributing to those differences.”