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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)