Fig. 4: Increasing seafood and by-product output under scenarios of whole-fish direct consumption.
From: Wild fish consumption can balance nutrient retention in farmed fish
a, Change in edible nutrient retention as more feed fish are allocated for direct human consumption. The colours indicate nutrients, with edible nutrient retention calculated at business as usual (that is, Fig. 1b, 0% whole fish consumed directly), increasing to 100% of edible whole fish consumed directly. The points show where reallocation of feed fish achieves edible nutrient retention equal to 100%. b, Fish oil deficit, new trimmings from edible species that have been consumed (that is, inedible portions) and new seafood produced from direct consumption (that is, edible portions). The lines are different edible species (blue whiting, herring, mackerel, anchoveta, sprat). In each simulation, edible nutrient retention was the total nutrients in seafood (edible portion of salmon and feed fish) divided by the total nutrients in wild fish required to produce fishmeal and fish oil.
