Table 5.

Whole-body composition and nutrient retention (%, wet-weight basis) of rainbow trout fed experimental diets for 10 weeks¹.

Item	FO	SO	BSLO	BSLO + BA	P-value
Whole-body composition
Moisture	66.98 ± 0.39b	68.15 ± 0.27a	68.37 ± 0.22a	68.45 ± 0.17a	0.018
Protein	16.89 ± 0.12	16.72 ± 0.33	16.32 ± 0.24	16.25 ± 0.18	0.235
Lipid	13.81 ± 0.34	13.26 ± 0.27	13.57 ± 0.22	13.17 ± 0.12	0.331
Ash	2.17 ± 0.02	2.12 ± 0.05	2.09 ± 0.05	2.21 ± 0.07	0.431
Retention efficiency
Protein retention1	39.09 ± 1.27	40.38 ± 1.91	37.18 ± 0.36	34.40 ± 1.85	0.091
Lipid retention1	71.38 ± 3.01	68.39 ± 2.41	66.94 ± 1.21	62.51 ± 3.25	0.189

Data expressed as mean ± SE, n = 3, values along row with different superscripts differ significantly (P < 0.05). FO = fish oil; SO = soybean oil; BSLO = black soldier fly oil; BA = bile acid. Initial average weight of fish is 32 ± 0.0 g. Initial whole-body composition of the experimental fish (moisture 75.52%; crude protein 13.40%; crude lipid 7.94%; ash 2.19%).

¹Nutrient retention (%) = 100 × Nutrient gain (g)/Nutrient consumed (g).