Evaluation of the suitability of a partially defatted black soldier fly (Hermetia illucens L.) larvae meal as ingredient for rainbow trout (Oncorhynchus mykiss Walbaum) diets

Table 1 Ingredients and proximate composition of HI larvae meal and experimental diets

Items	HI larvae meal	HI0	HI25	HI50
Ingredients, g/kg
FM (Chile, super prime)^a	-	600	450	300
HI larvae meal^b		0	200	400
Wheat meal	-	40	40	40
Wheat bran	-	90	60	30
Fish oil	-	90	70	50
Starch gelatinized, D500	-	150	150	150
Mineral mixture^c	-	15	15	15
Vitamin mixture^d	-	15	15	15
Proximate composition^e
DM, g/100 g	94.18	96.07	94.93	95.63
CP, g/100 g DM	55.34	45.20	44.86	45.00
EE, g/100 g DM	17.97	15.86	15.74	15.81
Ash, g/100 g DM	7.12	11.40	11.43	10.11
Chitin, g/100 g DM	5.00	-	1.05	2.09
NFE, g/100 g DM^f	14.57	27.54	26.92	26.99
Gross energy, MJ/kg DM^g	24.37	21.71	22.35	22.60

Abbreviations: HI Hermetia illucens, FM fish meal, DM dry matter, CP crude protein, EE ether extract, NFE Nitrogen Free Extracts
^aFish meal was purchased from Corpesca S.A. (Santiago, Chile). Proximate composition (% as-fed basis): 90.4 DM; 66.7 CP; 8.3 EE; 14.9 Ash
^b Hermetia illucens larvae meal purchased from Hermetia Deutschland GmbH & Co. KG (Baruth/Mark, Germany)
^cMineral mixture (g or mg/kg diet): bicalcium phosphate 500 g, calcium carbonate 215 g, sodium salt 40 g, potassium chloride 90 g, magnesium chloride 124 g, magnesium carbonate 124 g, iron sulfate 20 g, zinc sulfate 4 g, copper sulfate 3 g, potassium iodide 4 mg, cobalt sulfate 20 mg, manganese sulfate 3 g, sodium fluoride 1 g (Granda Zootecnici, Cuneo, Italy)
^dVitamin mixture (IU or mg/kg diet): DL-αtocopherolacetate, 60 IU; sodium menadione bisulfate, 5 mg; retinylacetate, 15,000 IU; DL-cholecalciferol, 3000 IU; thiamin, 15 mg; riboflavin, 30 mg; pyridoxine, 15 mg; Vitamin B₁₂, 0.05 mg; nicotinic acid, 175 mg; folic acid, 500 mg; inositol, 1000 mg; biotin, 2.5 mg; calcium panthotenate, 50 mg; choline chloride, 2000 mg (Granda Zootecnici, Cuneo, Italy)
^eValues are reported as mean of duplicate analyses
^fCalculated as 100 − (CP + EE + Ash + Chitin)
^gDetermined by calorimetric bomb

ISSN: 2049-1891