Increased levels of soy protein ingredients in the diet may also have played a role in the reduced body lipid retention with the FM60 and FM20 treatments.
The undigested high molecular fraction of soybean protein disrupts lipid digestion and absorption by reducing bile acid
reabsorption from the intestine in Japanese yellowtail (Nguyen et al., 2011).
Similarly, lipid retention was significantly reduced in Japanese flounder when fed SPC-based diets compared to a FM-based diet (Deng et al., 2006).
A decrease in lipid absorption efficiency and digestibility caused a reduction in body lipid levels in yellowtail kingfish fed
diets containing solvent-extracted SBM (Bowyer et al., 2013a).