Effect of dietary substitution of fish oil with flaxseed or sunflower oil on muscle fatty acid composition in juvenile steelhead trout (Oncorhynchus mykiss) reared at varying temperatures

The effect of changing temperature on muscle fatty acid composition was examined in juvenile steelhead trout (~ 120 g) with complete substitution of fish oil (herring oil; HE) with either flax seed oil (FLX; also known as linseed oil) or sunflower oil (SF). The temperature was increased from ~ 10.0 °C to 18.0 °C following seasonal temperature changes in ~ 2 °C incremental steps with plateaus. Dietary lipid analysis showed the HE diet was rich in...