Locally-Sourced Animal Protein Hydrolysates in High-Plant-Protein Diets Can Promote European Seabass Growth and Nutrient Utilization, Reducing Reliance on Fishmeal.

ABSTRACT: Upcycling meat and fish by-products into bioactive protein hydrolysates promotes zero-waste practices within the circular bioeconomy and provides locally-sourced alternatives to replace fishmeal (FM) in aquafeeds. In this study, novel hydrolysates were developed from blue shark skin, fish by-products, and swine processed animal protein, aiming to reduce the high-quality FM inclusion in European seabass (Dicentrarchus labrax) diets. Four isoproteic (53%) and isolipidic (18%) plant-based diets were formulated: a control (CTRL) diet containing 12.5% FM was compared to three experimental diets, including 3% of each hydrolysate at the expense of FM-protein: SHARK, FISH, and SWINE. Seabass juveniles (13 g) stocked in 160 L tanks (3.9 kg/m³) were fed the diets in triplicate, thr

SUBMITTER: Rodrigues-Dos-Santos L 

PROVIDER: S-EPMC12646735 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature