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New study finds farmed salmon has fewer environ pollutants than wild salmon

New study finds farmed salmon has fewer environmental pollutants than wild salmon

by Ruby Gonzalez April 27, 2017


Farmed salmon contains fewer environmental pollutants than its wild counterpart, according to a Norwegian study that’s been described as the biggest research of its kind so far. The study involved 100 samples of wild salmon caught in the sea in Northern Norway, and 100 samples of farmed salmon.

“It was previously widely thought that farmed salmon contained more environmental pollutants than wild salmon, but this proves not to be the case,” Anne-Katrine Lundebye, study co-author and senior scientist at the National Institute of Nutrition and Seafood Research (NIFES), said in a NIFES article.

Lundebye explained that the differences between wild and farmed were due to their diets. “Fish are what they eat, both in terms of environmental pollutants and nutrients. This can be controlled in farmed fish, while what fish eat in the wild varies,” Lundebye was quoted as saying.

The relatively low level of organic pollutants in farmed salmon has been attributed to changes in the composition of fish feed, among others. Today’s fish feed contains less fish oil, which was previously the main source of many of the undesirable substances in the feed, said the NIFES report.

        

The study, Lower levels of Persistent Organic Pollutants, metals and the marine Omega 3-fatty acid DHA in farmed compared to wild Atlantic salmon (Salmo salar), demonstrated that the concentrations of dioxins, polychlorinated biphenyls (PCBs), DDT, dieldrin, lindane, chlordane, Mirex, toxaphene and mercury in wild Atlantic salmon were higher than in farmed Atlantic salmon.

Full article at ANA

 

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