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Table 5 Fatty acids (% of total FAC ± SD) in muscle of juvenile eels reared on different diets; “sat” = saturated fatty acids; “unsat” = unsaturated fatty acids; “PUFA” = poly unsaturated fatty acids; a = t-test identified a significant difference (P < 0.05) between freshwater (Rutilus rutilus, Chironomidae larvae, and Gammarus pulex) and marine treatments (Pellets, Clupea harengus, Mysis spec., and Euphausia superba)

From: Dietary effects on fatty acid composition in muscle tissue of juvenile European eel, Anguilla anguilla (L.)

  Eel Rutilus (N = 12) Eel Ch.larvae (N = 12) Eel Gammarus (N = 12) Eel Pellets (N = 12) Eel Clupea (N = 12) Eel Crangon (N = 12) Eel Mysis (N = 12) Eel Euphausia (N = 12)
16:0a 13.76 ± 0.74 12.28 ± 0.75 12.60 ± 1.10 15.69 ± 1.51 13.89 ± 1.10 15.77 ± 0.53 15.41 ± 1.40 14.30 ± 0.89
16:1 n7a 5.11 ± 0.26 4.26 ± 0.26 4.65 ± 0.63 5.69 ± 0.61 5.04 ± 0.33 4.90 ± 0.62 5.23 ± 0.29 5.10 ± 0.46
16:2 n4 0.22 ± 0.00 0.20 ± 0.01 0.24 ± 0.02 0.29 ± 0.03 0.22 ± 0.05 0.23 ± 0.02 0.24 ± 0.02 0.24 ± 0.04
16:3 n4 0.24 ± 0.03 0.20 ± 0.01 0.24 ± 0.03 0.26 ± 0.03 0.24 ± 0.02 0.22 ± 0.04 0.23 ± 0.02 0.24 ± 0.01
17:0a 0.30 ± 0.02 0.31 ± 0.02 0.35 ± 0.05 0.36 ± 0.06 0.31 ± 0.03 0.43 ± 0.05 0.36 ± 0.02 0.35 ± 0.04
17:1 n7a 0.26 ± 0.01 0.23 ± 0.01 0.24 ± 0.01 0.27 ± 0.02 0.28 ± 0.02 0.30 ± 0.02 0.25 ± 0.01 0.26 ± 0.01
18:0 3.50 ± 0.33 3.31 ± 0.24 4.02 ± 0.98 3.28 ± 0.12 2.83 ± 0.25 4.28 ± 1.67 3.46 ± 0.49 3.19 ± 0.43
18:1 n9 28.87 ± 1.86 26.13 ± 1.53 26.70 ± 1.77 26.54 ± 1.98 25.26 ± 1.51 29.28 ± 1.54 26.14 ± 0.49 26.67 ± 1.01
18:1 n7 0.46 ± 0.02 0.45 ± 0.02 0.45 ± 0.02 0.46 ± 0.03 0.45 ± 0.02 0.44 ± 0.06 0.48 ± 0.01 0.47 ± 0.02
18:2 n6a 4.42 ± 0.35 4.24 ± 0.16 4.98 ± 0.33 4.40 ± 0.10 3.93 ± 0.11 4.32 ± 0.50 4.20 ± 0.30 4.40 ± 0.13
18:3 n6 0.12 ± 0.01 0.17 ± 0.12 0.16 ± 0.06 0.11 ± 0.03 0.10 ± 0.02 0.11 ± 0.02 0.12 ± 0.02 0.13 ± 0.01
18:3 n4 0.18 ± 0.01 0.17 ± 0.00 0.21 ± 0.03 0.26 ± 0.05 0.19 ± 0.01 0.18 ± 0.01 0.18 ± 0.01 0.18 ± 0.01
18:3 n3 0.72 ± 0.05 0.51 ± 0.09 0.73 ± 0.06 0.72 ± 0.10 0.62 ± 0.06 0.63 ± 0.10 0.66 ± 0.09 0.67 ± 0.18
18:4 n3 0.51 ± 0.06 0.50 ± 0.13 0.55 ± 0.02 0.69 ± 0.15 0.57 ± 0.03 0.48 ± 0.09 0.59 ± 0.11 0.63 ± 0.05
20:0 0.25 ± 0.02 0.93 ± 1.16 0.36 ± 0.06 0.24 ± 0.06 0.24 ± 0.03 0.41 ± 0.10 0.27 ± 0.06 0.29 ± 0.13
20:1 n9a 17.91 ± 1.01 20.02 ± 0.93 18.52 ± 1.80 13.61 ± 5.48 17.62 ± 0.90 13.54 ± 4.57 17.17 ± 1.70 17.47 ± 1.03
20:2 n6a 0.46 ± 0.01 0.45 ± 0.03 0.47 ± 0.01 0.44 ± 0.02 0.42 ± 0.01 0.42 ± 0.06 0.43 ± 0.01 0.40 ± 0.02
20:3 n6a 0.97 ± 0.10 1.03 ± 0.06 1.15 ± 0.22 0.89 ± 0.04 0.69 ± 0.12 0.97 ± 0.06 0.86 ± 0.09 0.89 ± 0.08
20:4 n6 (ARA) 0.82 ± 0.04 0.76 ± 0.07 0.86 ± 0.18 0.69 ± 0.06 0.74 ± 0.11 0.94 ± 0.13 0.72 ± 0.08 0.71 ± 0.08
21:0 0.02 ± 0.01 0.02 ± 0.01 0.02 ± 0.00 0.03 ± 0.00 0.03 ± 0.01 0.03 ± 0.00 0.03 ± 0.01 0.02 ± 0.01
20:3 n3 0.19 ± 0.02 0.13 ± 0.03 0.15 ± 0.02 0.16 ± 0.02 0.19 ± 0.02 0.13 ± 0.03 0.16 ± 0.02 0.14 ± 0.01
20:4 n3 1.52 ± 0.09 1.47 ± 0.22 1.46 ± 0.08 1.68 ± 0.19 1.60 ± 0.07 1.22 ± 0.08 1.49 ± 0.10 1.60 ± 0.10
20:5 n3 (EPA)a 3.04 ± 0.52 3.17 ± 0.77 3.18 ± 0.11 4.34 ± 0.89 4.13 ± 0.28 3.69 ± 0.59 4.04 ± 0.51 3.87 ± 0.36
22:0 0.03 ± 0.01 0.04 ± 0.00 0.06 ± 0.02 0.03 ± 0.01 0.03 ± 0.01 0.05 ± 0.00 0.03 ± 0.01 0.03 ± 0.01
22:1 n9a 6.25 ± 0.76 7.56 ± 0.52 7.31 ± 1.40 6.06 ± 0.79 7.00 ± 1.12 5.63 ± 1.12 5.67 ± 0.42 5.89 ± 0.48
22:2 n6a 0.23 ± 0.03 0.27 ± 0.05 0.24 ± 0.05 0.36 ± 0.05 0.31 ± 0.03 0.22 ± 0.05 0.28 ± 0.03 0.30 ± 0.03
22:5 n3 (DPA) 1.98 ± 0.10 2.31 ± 0.33 2.17 ± 0.42 2.42 ± 0.34 2.48 ± 0.41 2.30 ± 0.63 2.25 ± 0.07 2.33 ± 0.17
22:6 n3 (DHA)a 7.25 ± 0.89 8.34 ± 1.85 7.35 ± 0.88 9.64 ± 1.53 10.13 ± 0.70 8.40 ± 1.95 8.73 ± 0.83 8.82 ± 0.49
24:0 0.07 ± 0.02 0.10 ± 0.01 0.09 ± 0.03 0.10 ± 0.01 0.10 ± 0.02 0.13 ± 0.02 0.09 ± 0.02 0.10 ± 0.02
24:1 n9a 0.33 ± 0.03 0.43 ± 0.04 0.50 ± 0.11 0.29 ± 0.09 0.36 ± 0.12 0.35 ± 0.11 0.24 ± 0.04 0.24 ± 0.04
∑sata 17.98 ± 0.59 17.02 ± 1.07 17.54 ± 1.71 19.76 ± 1.42 17.49 ± 1.26 21.17 ± 2.28 19.69 ± 1.98 18.33 ± 1.52
∑1 unsata 59.20 ± 1.41 59.08 ± 2.61 58.37 ± 1.94 52.92 ± 3.95 56.01 ± 0.86 54.43 ± 1.68 55.17 ± 1.83 56.14 ± 2.27
∑2 unsat 5.33 ± 0.31 5.15 ± 0.22 5.94 ± 0.29 5.50 ± 0.13 4.89 ± 0.16 5.19 ± 0.59 5.15 ± 0.29 5.35 ± 0.12
∑3 unsata 2.42 ± 0.09 2.22 ± 0.16 2.63 ± 0.21 2.41 ± 0.13 2.03 ± 0.15 2.24 ± 0.07 2.21 ± 0.08 2.25 ± 0.13
∑4 + unsata 15.13 ± 1.55 16.55 ± 3.16 15.57 ± 1.24 19.45 ± 2.98 19.65 ± 1.30 17.03 ± 3.35 17.82 ± 1.65 17.97 ± 0.76
∑unsata 82.07 ± 0.57 83.01 ± 1.07 82.51 ± 1.71 80.28 ± 1.43 82.58 ± 1.29 78.90 ± 2.25 80.35 ± 1.96 81.71 ± 1.50
sat:unsata 0.22 ± 0.01 0.21 ± 0.02 0.21 ± 0.03 0.25 ± 0.02 0.21 ± 0.02 0.27 ± 0.04 0.25 ± 0.03 0.23 ± 0.02
∑n3a 15.22 ± 1.59 16.44 ± 3.30 15.58 ± 1.21 19.64 ± 3.05 19.71 ± 1.30 16.86 ± 3.26 17.92 ± 1.66 18.06 ± 0.96
∑n6a 7.02 ± 0.45 6.92 ± 0.14 7.87 ± 0.59 6.90 ± 0.17 6.21 ± 0.15 6.98 ± 0.67 6.62 ± 0.44 6.84 ± 0.26
n3:n6a 2.19 ± 0.35 2.37 ± 0.44 2.01 ± 0.21 2.85 ± 0.41 3.20 ± 0.25 2.41 ± 0.48 2.71 ± 0.31 2.65 ± 0.23
∑C16 PUFA 0.46 ± 0.03 0.40 ± 0.02 0.48 ± 0.04 0.56 ± 0.06 0.46 ± 0.04 0.45 ± 0.05 0.47 ± 0.03 0.48 ± 0.04
∑C18 PUFA 5.95 ± 0.25 5.59 ± 0.35 6.63 ± 0.23 6.19 ± 0.33 5.41 ± 0.10 5.72 ± 0.44 5.75 ± 0.27 6.01 ± 0.21
∑C20 PUFAa 6.99 ± 0.53 7.01 ± 0.91 7.27 ± 0.37 8.20 ± 1.15 7.78 ± 0.43 7.37 ± 0.84 7.70 ± 0.63 7.62 ± 0.27
∑C22 PUFAa 9.47 ± 0.96 10.92 ± 2.16 9.76 ± 1.25 12.42 ± 1.91 12.93 ± 1.13 10.93 ± 2.62 11.26 ± 0.93 11.46 ± 0.41
∑ PUFAa 22.87 ± 1.26 23.93 ± 3.39 24.14 ± 1.36 27.36 ± 3.17 26.57 ± 1.33 24.46 ± 3.58 25.18 ± 1.72 25.57 ± 0.81
EPA:ARAa 3.84 ± 0.85 4.32 ± 1.08 3.95 ± 0.42 6.32 ± 1.12 5.72 ± 0.77 4.14 ± 0.32 5.88 ± 0.99 5.58 ± 0.93
DHA:EPAa 2.44 ± 0.17 2.74 ± 0.05 2.36 ± 0.32 2.26 ± 0.25 2.48 ± 0.19 2.25 ± 0.21 2.17 ± 0.09 2.32 ± 0.07