Scientists have made an important discovery about the fish we eat. Mercury accumulation in fish tends to occur at greater depths of the ocean, researchers at the University of Hawaii at Manoa and the University of Michigan have found.
Scientists discovered a few years earlier that predatory fish feeding at deeper depths, such as swordfish, have higher mercury concentrations than those fish feeding closer to the surface, like yellowfin tuna, the National Monitor reports. But they didn’t know why.
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Now they have found that mercury, which travels through the atmosphere and falls on the ocean, breaks up at the surface level due to photochemical reactions, so fish that feed closer to the surface accumulate less of the common industrial toxin.
To read the complete National Monitor story, go here.