Evaluation of Six Selected Commercial Fermented Soybean Meal by Feeding Juvenile Turbot (Scophthalmus maximus L.)

Various kinds of fermented soybean meal are now commercially available, whereas the quality these products is uneven due to different processing technologies, fermentation strains, and raw meal, which would lead effects on bioavailability nutrients in aquaculture feeds. Thus, a 10-week feeding trial was conducted evaluate six available (FSBM) growth performance juvenile turbot (Scophthalmus maximus L.) analyze correlation between parameters FSBM components. Seven isonitrogenous isolipidic diets were formulated: fish-meal-based diet (the control group, FM) FM with 450 g/kg fish substituted by replacement groups, FSBM1, FSBM2, FSBM3, FSBM4, FSBM5, FSBM6). Results showed that specific rate (SGR) weight gain (WGR) significantly higher groups FMSB3 FMSB4 than other but lower group. Besides, no significant differences observed feed efficiency ratio (FER) protein (PER) among FM. Correlation analysis revealed SGR, PER, retention (PR) all positively correlated water-soluble trichloroacetic acid- (TCA-) soluble content FSBM, negatively trypsin inhibitor. In summary, commercial FSBM3 FSBM4 could yield rest selected when replacing diets, protein, TCA-soluble inhibitor serve as relatively accurate indicators evaluation FSBM.