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Study: Warmer Water Temperatures Result in Greater Toxin Levels in Fish

Harmony Spencer

In lab and field experiments, researchers found that water warmed to temperatures projected to occur during climate change led to an increase in Killifish appetite. When the little forage fish's food was tainted with methylmercury, they stored in in their tissues in greater concentrations in the warmer water. Killifish are on the bottom of the food chain for bigger predators like Tuna—meaning as ocean water warms, greater levels of toxins could potentially make their way into human diets.

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