Experimental diets Ingredients (g kg-1) FM PPC ESF FeM Fishmeal* 20.00       Pea Protein Concentrate¥   20.00     Extracted SF‡     20.00   Feather meal‼       20.00 Fishmeal* 25.00 25.00 25.00 25.00 Wheat Gluten 10.00 10.00 10.00 10.00 Wheat grain 17.14 17.14 17.14 17.14 EWOS premix 1.86 1.86 1.86 1.86 Fish oilΔ 26.00 26.00 26.00 26.00

FM: fishmeal, ESF: extracted sunflower; FeM: feather meal; PPC: pea protein concentrate ¥ AgriMarin, Stavanger, Norway ‡ Unknown ‼ Ge-Pro, Germany Δ Fiskerens Fiskeindustri, Skagen, Denmark

Table 1: Diet formulations and chemical composition of the dietary treatments.