Author summary In this paper we demonstrate that marine-fed farmed salmon is an inefficient way to produce nutritious seafood, and that directing wild-caught ‘feed’ fish towards human consumption could maximise nutrient production while also relieving pressure on fisheries stocks. Substantial growth in aquaculture is required to sustain growing global demand for animal-source foods, with potential for the sector to provide all 177 million tonnes of additional animal-source food needed wor...
