New acoustic tags being implanted in Canadian Atlantic Salmon are designed to let researchers know when a salmon has been eaten by a predator. Each tag is coated with a special polymer that breaks down harmlessly in a predator fish’s stomach and then transmits a signal notifying researchers that the juvenile salmon had been eaten. The research study these were developed for studies the effect of predation (Read: fish getting eaten) on the Atlantic Salmon populations of Nova Scotia’s Stewiacke River.

The new tag developed by InnovaSea. Photo: Canadian Department of Fisheries and Oceans.

Atlantic Salmon have been facing the challenge of a burgeoning Striped Bass population that arrives every summer during their annual migration up the Atlantic Coast. The migration, unfortunately, coincides with the annual ocean-bound run of juvenile salmon. To the Stripers, the juvenile salmon make a great snack, and this has salmon conservationists concerned…

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Source: CBC News.

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