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Table 3 Fatty acid composition (mg g−1 dry weight) of Ensis siliqua between April 2010 and February 2011

From: Temporal dynamics of amino and fatty acid composition in the razor clam Ensis siliqua (Mollusca: Bivalvia)

Fatty acids

Spring

Summer

Autumn

Winter

April

June

August

October

December

February

Saturated (SFA)

      

 14:0

4.57 ± 1.48a

2.65 ± 0.05b

0.83 ± 0.15c

0.72 ± 0.26c

0.78 ± 0.02c

0.79 ± 0.08c

 15:0

0.41 ± 0.11a

0.30 ± 0.01ab

0.16 ± 0.03c

0.16 ± 0.05c

0.19 ± 0.00bc

0.22 ± 0.02bc

 16:0

19.01 ± 4.16a

11.17 ± 0.73b

5.31 ± 0.79c

4.84 ± 1.34c

4.99 ± 0.12c

5.43 ± 0.55c

 17:0

0.88 ± 0.14a

0.77 ± 0.07ab

0.51 ± 0.08c

0.45 ± 0.12c

0.50 ± 0.01c

0.58 ± 0.05bc

 18:0

6.04 ± 0.66a

5.27 ± 0.23a

3.48 ± 0.39b

2.95 ± 0.69b

2.87 ± 0.05b

3.16 ± 0.19b

 19:0

0.20 ± 0.03a

0.19 ± 0.01a

0.12 ± 0.02b

0.10 ± 0.03b

0.10 ± 0.00b

0.11 ± 0.00b

 20:0

0.43 ± 0.27a

0.56 ± 0.11a

0.39 ± 0.18a

0.34 ± 0.11a

0.35 ± 0.01a

0.38 ± 0.05a

 22:0

0.12 ± 0.00ab

0.16 ± 0.05a

0.00 ± 0.00b

0.05 ± 0.00ab

0.07 ± 0.01ab

0.07 ± 0.01ab

Branched

      

 Iso 15:0

0.07 ± 0.00a

0.03 ± 0.00a

0.02 ± 0.01a

0.02 ± 0.01a

0.02 ± 0.00a

0.03 ± 0.00a

 Anteiso 16:0

0.53 ± 0.08a

0.42 ± 0.05a

0.43 ± 0.08a

0.39 ± 0.11a

0.44 ± 0.01a

0.56 ± 0.04a

 Iso 17:0

0.80 ± 0.15a

0.55 ± 0.04b

0.37 ± 0.07b

0.33 ± 0.09b

0.36 ± 0.01b

0.49 ± 0.04b

 ∑Branched

1.38 ± 0.28a

1.00 ± 0.03ab

0.82 ± 0.16b

0.73 ± 0.20b

0.81 ± 0.02b

1.07 ± 0.07ab

 ∑SFA

33.04 ± 7.13a

22.07 ± 1.22b

11.61 ± 1.78c

10.35 ± 2.79c

10.64 ± 0.22c

11.81 ± 1.02c

Monounsaturated (MUFA)

      

 16:1n-9

0.84 ± 0.07ab

0.72 ± 0.08a

0.73 ± 0.11a

0.64 ± 0.16a

0.69 ± 0.01a

1.06 ± 0.06b

 16:1n-7

3.73 ± 0.72a

2.82 ± 0.12b

0.87 ± 0.13c

0.76 ± 0.23c

0.65 ± 0.08c

0.78 ± 0.08c

 16:1n-5

0.16 ± 0.03a

0.12 ± 0.01ab

0.08 ± 0.01bc

0.06 ± 0.01c

0.06 ± 0.00c

0.08 ± 0.01bc

 17:1

0.96 ± 0.15a

0.81 ± 0.16ab

0.76 ± 0.13ab

0.50 ± 0.11b

0.70 ± 0.01ab

0.88 ± 0.05a

 18:1n-9

5.12 ± 0.99a

2.81 ± 0.06b

1.50 ± 0.09c

1.30 ± 0.35c

1.20 ± 0.04c

1.24 ± 0.06c

 18:1n-7

2.36 ± 0.42a

1.51 ± 0.02b

0.90 ± 0.11c

0.84 ± 0.22c

1.03 ± 0.05bc

1.13 ± 0.04bc

 18:1n-5

0.00 ± 0.00a

0.03 ± 0.00a

0.00 ± 0.00a

0.00 ± 0.00a

0.02 ± 0.00a

0.00 ± 0.00a

 20:1n-11

1.17 ± 0.11a

1.25 ± 0.04a

1.13 ± 0.16ab

0.83 ± 0.21bc

0.77 ± 0.02c

0.81 ± 0.01c

 20:1n-9

2.12 ± 0.21a

1.19 ± 0.06b

0.80 ± 0.11c

0.68 ± 0.17c

0.67 ± 0.02c

0.68 ± 0.02c

 20:1n-7

0.84 ± 0.08a

0.76 ± 0.02ab

0.57 ± 0.09ab

0.46 ± 0.11b

0.57 ± 0.01ab

0.77 ± 0.01ab

 22:1n-9

0.00 ± 0.00a

0.00 ± 0.00a

0.00 ± 0.00a

0.03 ± 0.00a

0.00 ± 0.00a

0.06 ± 0.00a

 ∑MUFA

17.29 ± 2.79a

12.01 ± 0.28b

7.35 ± 0.84c

6.08 ± 1.59c

6.32 ± 0.23c

7.46 ± 0.33c

Polyunsaturated (PUFA)

      

 16:2n-4

0.24 ± 0.01a

0.27 ± 0.02a

0.25 ± 0.04a

0.25 ± 0.08a

0.27 ± 0.00a

0.33 ± 0.02a

 16:3n-4

0.17 ± 0.03ab

0.20 ± 0.06a

0.16 ± 0.02ab

0.14 ± 0.03abc

0.10 ± 0.00c

0.12 ± 0.01bc

 16:3n-3

5.10 ± 0.38a

4.54 ± 0.47ab

4.45 ± 0.62ab

3.46 ± 0.78b

3.66 ± 0.07b

4.17 ± 0.21ab

 16:4n-3

0.00 ± 0.00a

0.00 ± 0.00a

0.00 ± 0.00a

0.00 ± 0.00a

0.01 ± 0.00a

0.02 ± 0.00a

 18:2n-6

0.85 ± 0.20a

0.40 ± 0.01ab

0.50 ± 0.30ab

0.31 ± 0.07ab

0.25 ± 0.01b

0.29 ± 0.01ab

 18:3n-6

0.21 ± 0.05a

0.10 ± 0.01b

0.00 ± 0.00b

0.07 ± 0.01b

0.05 ± 0.00b

0.07 ± 0.00b

 18:3n-4

0.12 ± 0.01a

0.00 ± 0.00a

0.00 ± 0.00a

0.03 ± 0.00a

0.00 ± 0.00a

0.00 ± 0.00a

 18:3n-3

1.60 ± 0.50a

0.38 ± 0.01b

0.22 ± 0.05b

0.35 ± 0.09b

0.23 ± 0.02b

0.44 ± 0.01b

 18:4n-3

2.14 ± 0.73a

0.77 ± 0.01b

0.34 ± 0.07b

0.54 ± 0.20b

0.40 ± 0.02b

0.65 ± 0.06b

 20:2n-6

1.44 ± 0.20a

0.78 ± 0.04b

0.65 ± 0.11bc

0.52 ± 0.14bc

0.41 ± 0.01c

0.44 ± 0.02c

 20:4n-6

1.86 ± 0.43ab

2.77 ± 0.03a

1.90 ± 0.46ab

1.77 ± 0.56b

1.53 ± 0.10b

2.05 ± 0.05ab

 20:3n-3

0.18 ± 0.04a

0.04 ± 0.00b

0.00 ± 0.00b

0.03 ± 0.02b

0.02 ± 0.00b

0.00 ± 0.00b

 20:4n-3

0.69 ± 0.18a

0.32 ± 0.00ab

0.17 ± 0.02ab

0.15 ± 0.05ab

0.13 ± 0.00b

0.19 ± 0.01ab

 20:5n-3

8.38 ± 2.48a

5.35 ± 0.16ab

2.93 ± 0.69bc

2.55 ± 0.86bc

2.19 ± 0.06c

3.17 ± 0.11bc

 21:5n-3

1.62 ± 0.30a

1.32 ± 0.28ab

1.03 ± 0.12b

0.92 ± 0.27b

0.94 ± 0.02b

1.37 ± 0.02ab

 22:4n-6

1.08 ± 0.13a

1.57 ± 0.06b

1.03 ± 0.23ac

0.95 ± 0.31ac

0.93 ± 0.01ac

1.16 ± 0.02abc

 22:5n-6

0.51 ± 0.10a

0.43 ± 0.02a

0.43 ± 0.10a

0.36 ± 0.12a

0.34 ± 0.00a

0.60 ± 0.01a

 22:5n-3

2.20 ± 0.42a

1.94 ± 0.06ab

1.26 ± 0.34bc

1.08 ± 0.38c

1.14 ± 0.02c

1.76 ± 0.02abc

 22:6n-3

9.27 ± 2.10a

7.54 ± 0.15ab

5.48 ± 1.35b

4.67 ± 1.65b

4.49 ± 0.06b

6.03 ± 0.05ab

 ∑PUFA

37.61 ± 8.24a

28.41 ± 1.43a

20.80 ± 3.87b

18.11 ± 5.59b

17.06 ± 0.36b

22.82 ± 0.32b

 ∑ n-3

31.18 ± 7.11a

21.91 ± 1.32ab

15.88 ± 3.23ab

13.76 ± 4.28ab

13.21 ± 0.23b

17.80 ± 0.34ab

 ∑ n-6

5.94 ± 1.10a

6.02 ± 0.12a

4.51 ± 0.61ab

3.95 ± 1.23b

3.49 ± 0.13b

4.56 ± 0.07ab

 n-3/n-6

5.21 ± 0.25a

3.64 ± 0.20b

3.50 ± 0.28b

3.49 ± 0.03b

3.79 ± 0.09b

3.90 ± 0.13b

 DHA/EPA

1.13 ± 0.10a

1.41 ± 0.04b

1.87 ± 0.04c

1.82 ± 0.04c

2.05 ± 0.03d

1.90 ± 0.08 cd

 ∑FA

87.94 ± 18.15a

62.49 ± 2.2b

39.76 ± 6.46bc

34.53 ± 9.97c

34.02 ± 0.78c

42.09 ± 1.65bc

  1. Different superscript letters within rows represent significant differences (P < 0.05) and should be interpreted in the following exemplificative manner: a not ≠ a, a ≠ b, a ≠ c; ab ≠ cd, a not ≠ ab, ab not ≠ bc
  2. Values are means of triplicate samples (±SD)