Soybean meal is among the most widely utilized plant-based ingredients in formulating feed for aquatic species. Its nutritional profile, characterized by high protein content and a favorable amino acids composition, makes it an excellent substitute for animal-based proteins.
This study aimed to assess the effects of various sources of soybean meal protein, encompassing four experimental diets. The trial was conducted in a clear water recirculating system, with a stocking density of 20 fish fry per tank and an initial weight of 2.14 ± 0.03 g (Mean ± SEM) for a duration of 10 weeks period. The experimental diets included a basal diet comprising 56.4% soybean meal and 8% poultry meal as the primary protein sources. Three test diets were then developed replacing soybean meal with either corn fermented protein (CFP-GT33), enzyme treated soy (HP300) or a high protein low oligosaccharide variety (Bright Day). Additionally, a commercial 32% protein catfish feed was included as a reference. All growth data collected during the trial, except for the survival rate (p > 0.05), showed significant differences among treatments (p < 0.001). Furthermore, we appreciated that the use of the Bright Day treatment exhibited good tissue development and a performance for channel catfish.
Considering the results of this study, we can highlight that the use of soybean meal protein is a feasible alternative for animal-based diets. Histological and gene sequencing studies in channel catfish will validate the dietary matrix and the interaction of their components with the physiological growth of the fish.