Insect larval meal as a possible alternative to fish meal in in rainbow trout (Oncorhynchus mykiss) diets: Black soldier fly (Hermetia illucens), Mealworm (Tenebrio molitor)

This study was conducted to determine the effect on growth performance and intestinal histomorphology of rainbow trout (Oncorhynchus mykiss) fed diets including black soldier fly (Hermetia illucens) prepupae meal (HI) mealworm (Tenebrio molitor) larvae (TM) used instead fish meal. Six with HI TM at three inclusion levels (10%, 20% 30%) a control diet based were prepared. Test encoded as control, HI10, HI20, HI30, TM10, TM20 TM30. Fish (average initial weight 34.17±0.88 g) randomly placed (30 for each) in 500 L fibreglass tanks. Each seven treatments tested triplicated by hand level 2.5% body times day 90 days. Results demonstrated that significantly affected substitution (p<0.05). had negative performance, but not villi length. In addition, width decreased containing 10% or The TM. 30% variables, length increased. results suggest (10%) can be included without adversely affecting performance. Future studies should expanded using highly defatted meals.