Fisheries in a flask? Loose DNA in seawater offers a new measure of marine populations

A large study published today boosts confidence that environmental DNA (eDNA) could become a reliable indicator of the abundance of fish. “There is more and more evidence,” says Einar Nielsen, a geneticist at the Technical University of Denmark, who was not involved in the work. But additional research is needed before the technique can be put into practice, he and other experts say.

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