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Table 3 Fatty acid composition (% of total fatty acids) in the intraperitoneal fat of tilapia fed the basal diet un-supplemented (control), or supplemented with 1% Arg, or 2% Arg for 56 days1

From: Dietary L-arginine supplementation reduces lipid accretion by regulating fatty acid metabolism in Nile tilapia (Oreochromis niloticus)

Fatty acid  Control 1%Arg 2%Arg P-value
C12:0 0.03 ± 0.00b 0.03 ± 0.00b 0.04 ± 0.00a 0.027
C14:0 1.28 ± 0.04 1.40 ± 0.03 1.25 ± 0.07 0.281
C15:0 0.10 ± 0.00 0.09 ± 0.00 0.10 ± 0.01 0.252
C16:0 16.15 ± 0.18a 15.59 ± 0.10b 16.28 ± 0.10a 0.046
C17:0 0.16 ± 0.01 0.15 ± 0.00 0.16 ± 0.01 0.422
C18:0 5.63 ± 0.14a 5.89 ± 0.13a 4.92 ± 0.07b 0.007
C20:0 0.29 ± 0.00 0.27 ± 0.00 0.29 ± 0.01 0.332
C21:0 1.64 ± 0.02 1.66 ± 0.02 1.68 ± 0.03 0.736
C22:0 0.16 ± 0.00 0.15 ± 0.00 0.17 ± 0.00 0.064
C23:0 0.09 ± 0.00 0.09 ± 0.01 0.09 ± 0.01 0.885
C24:0 0.65 ± 0.03 0.61 ± 0.01 0.60 ± 0.02 0.532
∑ SFAs 26.17 ± 0.08 25.93 ± 0.02 25.58 ± 0.20 0.089
C14:1n-5 0.02 ± 0.00 0.02 ± 0.00 0.02 ± 0.00 0.422
C16:1n-7 1.48 ± 0.04 1.53 ± 0.03 1.61 ± 0.03 0.144
C18:1n-9 30.84 ± 0.17a 30.28 ± 0.09b 28.76 ± 0.06c 0.000
C20:1n-9 1.25 ± 0.03 1.28 ± 0.03 1.19 ± 0.05 0.45
C22:1n-9 0.09 ± 0.01 0.09 ± 0.00 0.09 ± 0.01 0.936
C24:1n-9 0.04 ± 0.00 0.04 ± 0.00 0.04 ± 0.00 0.178
∑ MUFAs 33.72 ± 0.16a 33.23 ± 0.14a 31.72 ± 0.07b 0.000
C18:3n-3 2.97 ± 0.03b 3.46 ± 0.05ab 3.66 ± 0.21a 0.047
C20:3n-3 0.41 ± 0.00 0.43 ± 0.01 0.43 ± 0.00 0.182
C20:5n-3 0.10 ± 0.00 0.10 ± 0.00 0.11 ± 0.01 0.308
C22:6n-3 1.29 ± 0.06 1.13 ± 0.04 1.16 ± 0.07 0.324
∑ n-3 PUFAs 4.77 ± 0.05b 5.11 ± 0.03ab 5.35 ± 0.14a 0.027
C18:2n-6 32.61 ± 0.13c 33.23 ± 0.11b 34.97 ± 0.15a 0.000
C20:3n-6 1.57 ± 0.08 1.47 ± 0.03 1.42 ± 0.07 0.425
C20:4n-6 1.12 ± 0.01 0.99 ± 0.04 0.91 ± 0.06 0.092
C22:2n-6 0.05 ± 0.00 0.05 ± 0.00 0.06 ± 0.01 0.870
∑ n-6 PUFAs 35.34 ± 0.16b 35.73 ± 0.10b 37.36 ± 0.08a 0.000
∑ PUFAs 40.11 ± 0.13c 40.84 ± 0.13b 42.71 ± 0.17a 0.000
n-6:n-3 7.41 ± 0.11 6.99 ± 0.03 6.99 ± 0.19 0.175
  1. 1Values are means ± SEM, n = 3 tanks per group. Means without a common letter differ, P < 0.05. MUFAs, monounsaturated fatty acids; n-6:n-3, n-6 PUFAs:n-3 PUFAs; PUFAs Polyunsaturated fatty acids, SFAs Saturated fatty acids