Lake trout are a predator fish at the top of the food web, so chemicals accumulate in their tissues. Photo: EPA.gov.
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Great Lakes Echo - Environmental news of the Great Lakes region
Great Lakes Echo (https://greatlakesecho.org/2012/08/07/fishing-for-contaminants-great-lakes-lake-trout-are-harbingers-of-global-pollutants/brianstory2/)