Wild fish consumption can balance nutrient retention in farmed fish.
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Abstract
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.
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Acknowledgements: D.F.W. was funded by a Henslow Fellowship at Murray Edwards College, University of Cambridge. J.P.W.R was funded by a Royal Society University Research Fellowship and a Leverhulme Trust Early Career Fellowship. The study of A.L. and B.d.R. is supported by the Scottish Government’s Rural and Environmental Science and Analytical Services Division (RESAS). The funders had no role in study design, data collection and analysis, decision to publish or preparation of the paper.
Funder: D.F.W. was funded by a Henslow Fellowship at Murray Edwards College, University of Cambridge
Funder: The research of A.L. and B.d.R is supported by the Scottish Government’s Rural and Environmental Science and Analytical Services Division (RESAS)
Funder: J.P.W.R was funded by a Royal Society University Research Fellowship and a Leverhulme Trust Early Career Fellowship
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2662-1355
