Table 4 Fatty acid composition of Cyprinus carpio cultured under five different feeding regimes (mg 100 g−1 of fresh weight).

From: Effect of Lemna minor supplemented diets on growth, digestive physiology and expression of fatty acids biosynthesis genes of Cyprinus carpio

Fatty acids

LM0

LM5

LM10

LM15

LM20

Polynomial contrasts

Linear

Quadratic

Saturated fatty acids (SFA)

14:0

27.32 ± 0.89a

23.61 ± 0.62b

17.26 ± 0.41c

16.39 ± 0.16c

11.39 ± 1.26d

 < 0.001

0.111

15:0

4.45 ± 0.01c

6.10 ± 0.48b

5.48 ± 0.98c

7.34 ± 0.08a

6.39 ± 0.28b

 < 0.001

0.031

16:0

383.00 ± 0.01b

434.12 ± 1.74a

354.66 ± 6.64c

364.53 ± 5.15c

320.44 ± 5.60d

 < 0.001

 < 0.001

18:0

1.90 ± 0.02c

4.69 ± 0.20a

3.31 ± 0.68b

1.38 ± 0.39c

3.15 ± 0.45b

0.289

0.008

24:0

10.53 ± 0.07c

8.49 ± 0.36d

11.03 ± 0.09b

9.79 ± 0.18c

12.89 ± 0.65a

 < 0.001

 < 0.001

Total SFA

427.21 ± 0.89b

477.01 ± 1.31a

391.74 ± 7.44c

399.44 ± 4.78c

354.26 ± 7.86d

 < 0.001

 < 0.001

Monounsaturated fatty acids (MUFA)

16:1n-7

26.44 ± 0.01a

23.46 ± 0.93b

8.21 ± 0.67c

4.68 ± 0.41d

2.29 ± 0.19e

 < 0.001

 < 0.001

18:1n-9

1014.10 ± 0.40a

959.98 ± 0.70b

795.25 ± 5.50c

745.45 ± 1.29d

608.05 ± 6.44e

 < 0.001

 < 0.001

24:1

2.52 ± 0.03c

2.55 ± 0.37c

3.23 ± 0.05b

5.26 ± 0.37a

2.78 ± 1.12bc

0.010

0.012

Total MUFA

1043.06 ± 0.42a

985.99 ± 0.13b

806.69 ± 6.19c

755.39 ± 1.32d

613.12 ± 3.13e

 < 0.001

 < 0.001

Polyunsaturated fatty acids (PUFA)

18:2n-6 (LOA)

1087.98 ± 0.31a

948.68 ± 2.69d

982.46 ± 9.67c

1033.81 ± 8.04b

1099.49 ± 0.08a

 < 0.001

 < 0.001

20:2n-6

32.73 ± 1.75a

17.43 ± 1.14c

24.44 ± 1.47b

26.23 ± 3.15b

30.66 ± 1.91ab

0.230

 < 0.001

20:3n-6

16.25 ± 0.92a

11.28 ± 1.42c

12.42 ± 0.42bc

13.92 ± 0.25b

10.61 ± 0.17c

 < 0.001

0.057

20:4n-6

27.41 ± 0.50a

22.39 ± 1.12b

22.80 ± 0.63b

26.65 ± 1.67a

21.51 ± 0.25b

0.002

0.159

22:5n-6

66.97 ± 1.97a

54.07 ± 0.34b

49.53 ± 0.13c

56.78 ± 0.99b

46.22 ± 0.02d

 < 0.001

 < 0.001

Total n-6 PUFA

1231.34 ± 1.52a

1053.86 ± 8.75e

1091.65 ± 8.85d

1157.40 ± 7.20c

1208.48 ± 2.42b

0.002

 < 0.001

18:3n-3 (ALA)

15.22 ± 0.01c

14.92 ± 0.69c

30.05 ± 0.33b

38.35 ± 2.14a

38.32 ± 0.78a

 < 0.001

0.021

20:4n-3

128.04 ± 1.36d

166.65 ± 0.40a

150.88 ± 4.39c

161.30 ± 0.74ab

156.96 ± 2.57bc

 < 0.001

 < 0.001

20:5n-3 (EPA)

3.95 ± 0.02c

5.01 ± 0.34b

5.96 ± 0.05a

6.00 ± 0.40a

5.28 ± 0.12b

 < 0.001

 < 0.001

22:5n-3

5.39 ± 0.01d

9.09 ± 0.35c

11.54 ± 0.14a

11.10 ± 0.01ab

10.42 ± 0.09b

 < 0.001

 < 0.001

22:6n-3 (DHA)

53.60 ± 5.01e

81.01 ± 1.77d

86.01 ± 0.52c

91.03 ± 1.61b

107.50 ± 1.68a

 < 0.001

0.003

Total n-3 PUFA

206.20 ± 6.54d

276.68 ± 2.81c

284.44 ± 6.02c

307.78 ± 1.67b

318.48 ± 5.21a

 < 0.001

 < 0.001

EPA + DHA

57.55 ± 5.01e

86.02 ± 2.11d

91.97 ± 0.58c

97.04 ± 1.21b

112.79 ± 1.57a

 < 0.001

0.001

n-6/n-3

5.97 ± 0.03a

3.80 ± 0.01b

3.84 ± 0.03b

3.76 ± 0.02b

3.79 ± 0.00b

 < 0.001

 < 0.001

  1. Values (means ± SE, n = 3) in each row with different superscript are significantly different (p < 0.05). The polynomial orthogonal contrast was considered significant at p < 0.05 level.
  2. LM0 = Control, soybean; LM5 = 5% L. minor; LM10 = 10% L. minor; LM15 = 15% L. minor; LM20 = 20% L. minor.