Effects of black soldier fly pulp on growth performance, histomorphology and lipid metabolism gene expression of Micropterus salmoides

Abstract A 62-day feeding trial was conducted to assess the effects of dietary black soldier fly pulp (BSFP) on growth performance, liver and intestine histomorphology, and liver lipid metabolism gene expression of Micropterus salmoides. Four isoproteic and isolipidic diets were formulated by adding BSFP (original substance) to the basal diet at the rate of 0% (BSFP0), 1% (BSFP1), 2% (BSFP2) and 4% (BSFP4), corresponding to inclusion of 0, 4.5, 9.0 and 18.0 g/kg DM in diets. Each diet was randomly assigned to triplicate groups of 35 fish per tank. Fish were fed twice daily to apparent satiation. Results indicated that fish fed BSFP2 had higher (p