Fish mislabelling a threat to marine conservation

Peckam fish 40% of the products were found to be mislabelled in a DNA barcoding study carried out at the University of Salford

Scientists have found widespread mislabelling, poor trading practices and neglect for endangered species are threatening fish stocks after DNA-testing seafood products sold across the world.

Biologists at the University of Salford obtained fish products sold as ‘snapper’ from markets, stores and restaurants across North America, Europe, Asia, Australia and New Zealand, and used DNA barcoding to identify the species sold under the popular name. Out of 300 samples, they recovered at least 67 different species, from 16 different families, with 40% of the products proving to be mislabelled.

Dr Donna- Maree Cawthorn, lead author of the study, said: “It is quite disheartening to know that consumers, worldwide, cannot possibly know what they are eating, when they choose snapper.

“Developed countries increasingly rely on seafood caught in distant waters, often in developing countries, but the current trade system fails to keep track of this complex supply chain.”

UK mislabelling high

The study, published on 22 June in Conservation Letters, shows that using a generic name to market fish fails to recognise the great diversity of species harvested from seas across the world.

Countries, like the UK, that particularly rely on imported seafood, appeared to amass the greatest diversity of species, and the highest mislabelling rates, even when following stringent labelling legislations, such as EU regulations.

Among the traded species, there are some that are endangered, and many more for which there is no information about the size and health of their stocks.

The study concludes that without coordinated efforts to improve international trade and product traceability, while strengthening controls, wild populations of many species are at risk of disappearing.

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