Internal Fitness Tracker (IMAGE)

Aarhus University

Internal Fitness Tracker

Caption

Danish researchers have now shown that fish such as cod move around with an internal fitness tracker that continuously logs information about the fish's metabolism. Information is recorded in the calcium structure in the fish's otoliths and can be used to gain new knowledge about how changes in the marine environment affect a fish's metabolism and behaviour.

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Photo: Peter Grønkjær

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