Total fishmeal replacement by defatted <i>Hermetia illucens</i> larvae meal in diets for gilthead seabream (<i>Sparus aurata</i>) juveniles

This work aimed to evaluate the digestibility of defatted Hermetia illucens larvae meal (HM), and its effects as fishmeal (FM) replacement on growth performance, feed nutrient utilisation, whole-body composition gilthead seabream (Sparus aurata) juveniles. To assess apparent coefficients (ADC) HM, a reference-diet (43% crude protein (CP); 17% lipid (CL)) test-diet, in which 30% reference diet was replaced with were formulated. effect dietary FM replacement, four isonitrogenous CP) isolipid (18% CL) diets formulated include HM at 0 (HM0), 15 (HM15), 30 (HM30), 45% (HM45), replacing 0, 22, 60, 100%, respectively. Triplicate groups fish (initial body weight 32 g) randomly assigned experimental trial lasted for 67 days. The trials conducted system, each tested triplicate. Protein, lipid, energy high (&gt;74%). Replacement by did not compromise ADC while dry matter increased. Complete had no negative efficiency, composition, utilisation juveniles, establishing potential an alternative ingredient aquafeeds.