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Wild fish consumption can balance nutrient retention in farmed fish

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • David F. Willer
  • Richard Newton
  • Wesley Malcorps
  • Bjorn Kok
  • David Little
  • Anneli Lofstedt
  • Baukje de Roos
  • James P. W. Robinson
<mark>Journal publication date</mark>20/03/2024
<mark>Journal</mark>Nature Food
Issue number3
Number of pages9
Pages (from-to)221-229
Publication StatusPublished
<mark>Original language</mark>English


Wild fish used as aquafeeds could be redirected towards human consumption to support sustainable marine resource use. Here we use mass-balance fish-in/fish-out ratio approaches to assess nutrient retention in salmon farming and identify scenarios that provide more nutrient-rich food to people. Using data on Norway’s salmon farms, our study revealed that six of nine dietary nutrients had higher yields in wild fish used for feeds, such as anchovies and mackerel, than in farmed salmon production. Reallocating one-third of food-grade wild feed fish towards direct human consumption would increase seafood production, while also retaining by-products for use as aquafeeds, thus maximizing nutrient utilization of marine resources.