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Table 8 Effect of the dietary inclusion of BSF meal on fillet proximate composition (g/100 g ww) and fatty acid profile (g/100 g of TFA) of rainbow trout (n = 9)

From: Dietary inclusion of a partially defatted black soldier fly (Hermetia illucens) larva meal in low fishmeal-based diets for rainbow trout (Oncorhynchus mykiss)

  BSF0 BSF3 BSF6 BSF9 BSF12 BSF15 SEM P-value
Proximate composition
 DM 25.8 26.8 27.2 25.5 26.1 26.6 0.303 0.643
 CP 19.2 20.0 18.3 19.2 19.6 20.5 0.323 0.493
 EE 4.44 4.97 5.34 4.74 5.13 4.76 0.223 0.897
 Ash 2.06a 1.68ab 1.54ab 1.43b 1.28b 1.22b 0.065 0.010
Fatty acid composition
 C12:0 0.09e 0.28de 0.44d 0.75c 1.16b 1.73a 0.081 0.000
 C13 iso 0.07ab 0.07ab 0.06ab 0.07a 0.05ab 0.04b 0.003 0.024
 C14:0 2.93c 3.00bc 2.91c 3.16bc 3.35b 4.36a 0.078 0.000
 C15 iso 0.07b 0.07b 0.07b 0.06b 0.07b 0.09a 0.001 0.000
 C15 aiso 0.02b 0.02b 0.02b 0.02b 0.03ab 0.04a 0.002 0.000
 C14:1 c-9 + C15:0 0.33b 0.33b 0.32b 0.34b 0.34b 0.43a 0.007 0.000
 C16:0 18.6b 19.1b 18.8b 19.6b 20.2b 25.4a 0.361 0.000
 C17 iso 0.21b 0.22b 0.21b 0.20b 0.22b 0.28a 0.005 0.000
 C17 aiso 0.43cd 0.42d 0.42d 0.50bc 0.52b 0.64a 0.013 0.000
 C16:1 c-9 4.88c 5.14bc 5.03bc 5.29bc 5.52b 6.31a 0.085 0.000
 C17:0 0.29b 0.28b 0.29b 0.27b 0.28b 0.40a 0.008 0.000
 C18 iso 0.12 0.11 0.10 0.12 0.12 0.12 0.004 0.421
 C17:1 c-9 0.19 0.18 0.20 0.23 0.21 0.21 0.006 0.217
 C18:0 5.11b 5.13b 5.10b 5.32b 5.44b 6.53a 0.078 0.000
 C18:1 t-6–10 0.09b 0.10b 0.09b 0.10b 0.11ab 0.12a 0.002 0.000
 C18:1 t-11–12 0.03 0.03 0.02 0.02 0.02 0.03 0.001 0.104
 C18:1 t-13–14 + c-6–8 0.12b 0.12b 0.11b 0.13b 0.12b 0.16a 0.003 0.000
 C18:1 c-9 23.3d 24.0cd 24.9bcd 25.4bc 26.6b 31.3a 0.397 0.000
 C18:1 c-11 2.88b 2.93b 2.92b 2.93b 2.99b 3.50a 0.038 0.000
 C18:2 n-6 21.0a 21.6a 21.8a 20.9a 20.7a 12.3b 0.513 0.000
 C18:3 n-3 2.51a 2.62a 2.51a 2.41a 2.22a 0.93b 0.089 0.000
 C18:3 n-6 0.32a 0.31a 0.34a 0.36a 0.29a 0.12b 0.014 0.000
 C20:0 0.16b 0.17b 0.18b 0.18b 0.18b 0.23a 0.004 0.000
 C20:1 c-9 1.17b 1.15b 1.20b 1.22b 1.26ab 1.44a 0.024 0.003
 C20:1 c-11 0.17a 0.16ab 0.15ab 0.15ab 0.14b 0.05c 0.006 0.000
 C20:2 n-6 0.98a 0.93a 1.01a 0.96a 0.95a 0.66b 0.025 0.000
 C20:3 n-3 0.15a 0.15a 0.16a 0.14a 0.14a 0.07b 0.005 0.000
 C20:3 n-6 0.63a 0.59a 0.64a 0.70a 0.60a 0.20b 0.025 0.000
 C20:4 n-6 0.75a 0.72a 0.73a 0.76a 0.62a 0.22b 0.031 0.000
 C20:5 n-3 2.96ab 3.14a 2.68ab 2.53b 1.82c 0.54d 0.128 0.000
 C22:0 0.10 0.10 0.12 0.12 0.11 0.11 0.002 0.055
 C22:1 n-9 0.14 0.14 0.15 0.16 0.17 0.17 0.006 0.517
 C22:5 n-3 0.92ab 1.03a 0.92ab 0.80b 0.55c 0.12d 0.046 0.000
 C22:6 n-3 8.19a 5.56b 5.35bc 4.18cd 2.97d 1.11e 0.326 0.000
Σ SFA 27.7b 28.4ab 28.2ab 29.7ab 31.0ab 35.7a 0.821 0.043
Σ BCFA 0.91bc 0.91bc 0.86c 0.97b 1.00b 1.22a 0.018 0.000
Σ MUFA 33.0d 34.0cd 34.8bcd 35.6bc 37.2b 43.3a 0.519 0.000
Σ PUFA 38.4a 36.7ab 36.1ab 33.8bc 30.8c 16.3d 1.089 0.000
Σ PUFA / Σ SFA 1.39a 1.29a 1.28a 1.14b 1.00c 0.39d 0.047 0.000
Σ n-3 14.7a 12.5b 11.6bc 10.1c 7.71d 2.78e 0.559 0.000
Σ n-6 23.7a 24.2a 24.5a 23.7a 23.1a 13.5b 0.590 0.000
Σ n-3 / Σ n-6 0.62a 0.51b 0.47b 0.43b 0.34c 0.19d 0.020 0.000
  1. Abbreviations: BSF Hermetia illucens, ww wet weight, TFA total fatty acid, SEM standard error of the mean, DM dry matter, CP crude protein, EE ether extract, c cis, t trans, SFA saturated fatty acids, BCFA branched chain fatty acids, MUFA monounsaturated fatty acids, PUFA polyunsaturated fatty acids. Values are reported as mean of duplicate analyses. Different superscripts within a row indicate significant differences (P < 0.05)