27 January 2022
These data were used to quantify the vol- ume of fish required to produce the fish oil needed in Scottish salmon production in 2014 and to estimate the micronutrient retention of essential dietary micronutrients (i.e. [...] These three values were then used to estimate the vol- ume of wild-caught fish in wet fish used in 2014 and to provide uncertainty on the volume of wild-caught fish in Scottish salmon production. [...] These values were com- pared with the total volume of micronutrients in farmed Scottish salmon in 2014 that were produced using food-grade wild-caught fish products; using the assumption that 33% of fish in FMFO is trimmings this is the volume of micronutrients in 66% of Scottish salmon production (119,945 t). [...] Using the estimate of wild-caught fish required to meet DHA and EPA levels of farmed salmon (Fig 4), 24% of the wild-caught fish previously used for fish oil in salmonid production were then allocated for direct human consumption. [...] The fishmeal volume from wild-caught fish was the proportion of wild-caught fish in re-allocated fish oil (55%) multiplied by the volume of fishmeal from wild-caught fish in business-as-usual (3.5 Mt).