Seasonal variation of biochemical composition of Noah's ark shells (Arca noae L. 1758) in a Tunisian coastal lagoon in relation to its reproductive cycle and environmental conditions

Free Access

Table 2

Seasonal variation of the fatty acid composition (% of total fatty acids) of Ark shells collected from Bizerte lagoon.

Fatty acids	Oct-13	Nov-13	Dec-13	Jan-14	Feb-14	Mar-14	Apr-14	May-14	Jun-14	Jul-14	Aug-14	Sep-14
C14:0	4.55 ± 1.28^a	5.32 ± 3.38^a	4.15 ± 1.46^a	4.07 ± 2.15^a	5.70 ± 0.63^a	6.55 ± 1.32^a	5.33 ± 1.53^a	5.00 ± 3.79^a	8.63 ± 2.06^b	7.62 ± 2.19^b	6.60 ± 3.62^a	5.68 ± 1.33^a
C15:0	0.30 ± 0.06^a	1.76 ± 2.27^b	0.23 ± 0.04^a	0.54 ± 0.63^a	0.66 ± 0.46^a	0.57 ± 0.36^a	1.02 ± 0.44^b	0.31 ± 0.11^a	0.39 ± 0.08^a	0.50 ± 0.44^a	0.33 ± 0.08^a	0.45 ± 0.40^a
C16:0	25.46 ± 3.58^b	18.81 ± 2.47^a	17.45 ± 2.37^a	17.79 ± 1.97^a	21.32 ± 2.73^a	20.55 ± 2.63^a	16.03 ± 6.60^a	25.34 ± 3.81^b	27.64 ± 2.59^b	25.28 ± 1.63^b	24.99 ± 2.23^b	21.06 ± 2.13^a
C18:0	6.24 ± 1.30^a	6.47 ± 4.37^a	4.60 ± 1.10^a	5.90 ± 2.61^a	5.85 ± 0.77^a	5.17 ± 0.58^a	4.87 ± 0.71^a	5.26 ± 0.31^a	5.69 ± 0.98^a	5.73 ± 0.60^a	5.62 ± 0.89^a	6.36 ± 1.07^a
C20:0	0.01 ± 0.009^a	1.28 ± 0.27^b	1.48 ± 0.45^b	1.00 ± 0.55^b	0.06 ± 0.05^a	0.06 ± 0.06^a	0.16 ± 0.05^a	0.06 ± 0.03^a	0.08 ± 0.02^a	0.11 ± 0.06^a	0.12 ± 0.02^a	0.16 ± 0.05^a
C22:0	0.22 ± 0.20^a	0.29 ± 0.20^a	0.35 ± 0.21^a	0.35 ± 0.11^a	0.59 ± 0.43^a	0.82 ± 1.02^a	0.99 ± 0.48^a	0.30 ± 0.17^a	0.34 ± 0.14^a	0.94 ± 0.77^a	0.60 ± 0.49^a	0.63 ± 0.57^a
C24:0	0.26 ± 0.44^a	0.95 ± 0.37^a	0.86 ± 0.32^a	1.08 ± 0.61^b	0.62 ± 0.84^a	0.37 ± 0.32^a	1.19 ± 0.84^b	0.30 ± 0.26^a	0.33 ± 0.18^a	0.48 ± 0.38^a	0.29 ± 0.10^a	0.25 ± 0.19^a
SFA	37.07 ± 3.58^a	34.93 ± 9.47^a	29.15 ± 3.03^a	30.76 ± 6.76^a	34.84 ± 2.85^a	34.12 ± 3.05^a	29.62 ± 6.79^a	36.60 ± 6.55^a	43.13 ± 2.83^b	40.70 ± 3.32^b	38.58 ± 2.46^a	34.62 ± 2.05^a
C14:1	0.32 ± 0.18^b	1.62 ± 3.65^a	0.22 ± 0.20^b	0.76 ± 1.14^a	0.68 ± 0.51^a	0.79 ± 0.97^a	0.75 ± 0.26^a	1.14 ± 1.98^a	0.61 ± 0.45^a	0.95 ± 1.07^a	1.01 ± 1.08^a	0.63 ± 0.60^a
C15:1	0.43 ± 0.13^a	1.12 ± 0.84	0.84 ± 1.15	0.73 ± 0.15	0.64 ± 0.35	0.70 ± 0.47	0.56 ± 0.20	0.36 ± 0.13	0.57 ± 0.43	0.78 ± 0.77	0.56 ± 0.16	0.50 ± 0.30
C16:1n−7	7.05 ± 1.74^b	7.34 ± 2.47^b	8.10 ± 3.92^b	5.05 ± 0.78^a	5.91 ± 2.59^a	6.22 ± 1.42^ab	3.81 ± 1.60^a	6.78 ± 0.34^b	7.18 ± 1.43^b	6.06 ± 1.04^ab	9.28 ± 2.07^b	6.74 ± 1.65^ab
C18:1n−7	11.12 ± 1.97^b	4.87 ± 2.58^a	6.63 ± 1.28^a	7.58 ± 1.20^a	8.17 ± 2.06^a	8.21 ± 1.83^a	6.35 ± 0.96^a	8.88 ± 0.79^a	9.67 ± 0.91^a	9.41 ± 0.91^a	9.85 ± 1.06^a	8.09 ± 1.77^a
C20:1n−9	3.91 ± 0.69^a	5.25 ± 0.92^b	6.10 ± 1.39^b	5.59 ± 0.95^b	4.65 ± 2.58^ab	2.38 ± 0.93^a	2.41 ± 0.43^a	2.18 ± 0.28^a	2.45 ± 0.65^a	3.38 ± 0.84^a	3.83 ± 1.25^a	5.20 ± 0.85^b
C20:1n−7	1.09 ± 0.99^a	4.75 ± 0.79^b	5.41 ± 1.40^b	5.05 ± 1.17^b	1.85 ± 0.50^a	1.90 ± 1.04^a	5.65 ± 7.65^b	1.90 ± 1.50^a	0.91 ± 0.34^a	1.85 ± 1.00^a	2.52 ± 2.96^a	1.47 ± 0.63^a
C22:1	0.09 ± 0.10^a	0.61 ± 0.20^a	0.60 ± 0.292^a	0.57 ± 0.12^a	0.07 ± 0.05^a	0.18 ± 0.10^a	0.32 ± 0.34^a	0.12 ± 0.07^a	0.07 ± 0.06^a	0.20 ± 0.11^a	0.12 ± 0.11^a	0.17 ± 0.11^a
C24:1n−9	0.18 ± 0.23^a	0.36 ± 0.29^a	0.39 ± 0.19^a	0.22 ± 0.14^a	0.52 ± 0.40^a	0.35 ± 0.17^a	0.88 ± 0.69^a	0.19 ± 0.20^a	3.58 ± 0.73^b	0.17 ± 0.15^a	0.32 ± 0.34^a	0.18 ± 0.08^a
MUFA	24.22 ± 3.19^a	25.95 ± 4.15^a	28.32 ± 3.43^a	25.58 ± 1.54^a	22.54 ± 7.42^a	20.77 ± 1.50^b	20.79 ± 6.77^b	21.58 ± 2.08^a	21.64 ± 1.17^a	22.84 ± 1.64^a	27.53 ± 3.31^a	23.01 ± 2.45^a
C16:2	2.54 ± 0.38^a	1.84 ± 0.71^a	2.68 ± 1.25^a	2.49 ± 0.73^a	1.76 ± 0.23^a	1.53 ± 0.68^a	1.32 ± 0.29^a	1.81 ± 0.22^a	1.91 ± 0.24^a	1.79 ± 0.18^a	1.53 ± 0.18^a	1.72 ± 0.16^a
C16:3	0.45 ± 0.16^a	0.80 ± 0.41^a	0.75 ± 0.52^a	0.71 ± 0.30^a	0.70 ± 0.44^a	0.72 ± 0.51^a	1.64 ± 0.55^b	0.68 ± 0.14^a	0.54 ± 0.15^a	0.87 ± 0.24^a	0.56 ± 0.10^a	1.17 ± 0.94^ab
C16:4	0.30 ± 0.07^a	0.36 ± 0.09^a	0.45 ± 0.19^a	0.34 ± 0.09^a	1.29 ± 0.99^ab	0.49 ± 0.16^a	2.21 ± 0.55^b	1.15 ± 0.54^a	0.65 ± 0.18^a	1.20 ± 0.98^ab	1.00 ± 0.93^ab	1.14 ± 0.65^ab
C18:2n−6	3.79 ± 0.52^a	2.14 ± 0.30^a	2.67 ± 0.47^a	2.77 ± 1.31^a	3.44 ± 0.66^a	3.35 ± 0.49^a	2.44 ± 0.45^a	3.38 ± 0.36^a	3.21 ± 0.34^a	2.88 ± 0.42^a	2.91 ± 0.24^a	2.20 ± 1.73^a
C18:3n−6	0.43 ± 0.49^a	0.23 ± 0.07^a	0.29 ± 0.07^a	0.83 ± 1.36^a	0.46 ± 0.36^a	0.38 ± 0.15^a	0.51 ± 0.13^a	0.94 ± 0.24^a	1.13 ± 0.21^ab	0.86 ± 0.16^a	0.58 ± 0.13^a	2.22 ± 3.54^b
C18:3n−3	2.70 ± 0.78^a	1.92 ± 0.54^a	2.61 ± 0.69^a	2.58 ± 0.56^a	3.32 ± 0.78^b	3.32 ± 0.95^b	2.43 ± 0.33^a	3.77 ± 0.58^b	3.58 ± 0.73^b	2.59 ± 0.45^a	2.43 ± 0.42^a	1.60 ± 0.34^a
C18:4n−3	0.34 ± 0.15^a	6.47 ± 1.16^c	7.25 ± 2.63^c	6.00 ± 1.75^c	1.90 ± 0.90^a	1.62 ± 1.13^a	2.13 ± 1.08^b	0.59 ± 0.59^a	0.42 ± 0.52^a	1.90 ± 1.20^a	0.77 ± 0.69^a	1.23 ± 1.13^a
C20:2n−6	0.48 ± 0.05^a	1.17 ± 0.23^a	0.77 ± 0.20^a	1.26 ± 0.24^a	0.51 ± 0.41^a	1.07 ± 0.80^a	0.73 ± 0.42^a	0.51 ± 0.17^a	0.42 ± 0.084^a	0.88 ± 0.80^a	0.37 ± 0.13^a	0.42 ± 0.18^a
C20:3n−6	0.12 ± 0.02^a	0.18 ± 0.14^a	0.10 ± 0.06^a	0.14 ± 0.07^a	0.09 ± 0.07^a	0.06 ± 0.04^a	0.07 ± 0.07^a	0.05 ± 0.03^a	0.04 ± 0.02^a	0.04 ± 0.01^a	0.07 ± 0.03^a	0.11 ± 0.02^a
C20:4n−6	3.15 ± 1.16^a	2.61 ± 0.54^a	3.17 ± 0.91^a	2.84 ± 1.35^a	3.08 ± 0.71^a	2.98 ± 0.54^a	2.57 ± 0.41^a	1.95 ± 0.41^b	1.44 ± 0.50^b	1.71 ± 0.60^b	2.38 ± 0.50^a	4.34 ± 1.10^a
C20:3n−3	0.15 ± 0.10^a	0.90 ± 0.24^b	1.03 ± 0.34^b	0.75 ± 0.41^a	0.04 ± 0.04^a	0.15 ± 0.08^a	0.14 ± 0.08^a	0.13 ± 0.04^a	0.13 ± 0.03^a	0.11 ± 0.06^a	0.04 ± 0.04^a	0.07 ± 0.02^a
C20:4n−3	0.27 ± 0.07^a	0.37 ± 0.15^a	0.30 ± 0.18^a	0.37 ± 0.32^a	0.25 ± 0.05^a	0.25 ± 0.08^a	0.29 ± 0.15^a	0.24 ± 0.06^a	0.20 ± 0.03^a	0.19 ± 0.08^a	0.36 ± 0.11^a	0.25 ± 0.03^a
C20:5n−3	6.63 ± 1.40^a	6.30 ± 2.36^a	6.037 ± 0.82^a	5.62 ± 1.56^a	6.52 ± 1.26^a	6.59 ± 1.64^a	5.19 ± 0.55^a	7.68 ± 1.68^a	5.16 ± 0.77^a	4.21 ± 1.39^a	6.11 ± 0.53^a	5.78 ± 0.76^a
C22:2i/2j	3.80 ± 1.11^a	2.98 ± 0.80^a	3.85 ± 0.95^a	3.66 ± 0.71^a	4.72 ± 1.44^a	4.47 ± 1.47^a	4.87 ± 1.01^a	3.50 ± 0.53^a	2.38 ± 0.73^a	3.62 ± 1.46^a	2.55 ± 1.79^a	5.75 ± 2.27^a
C21:5	0.84 ± 0.26^a	0.77 ± 0.36^a	0.94 ± 0.26^a	0.97 ± 0.19^a	0.99 ± 0.40^a	1.24 ± 0.35^ab	2.58 ± 1.11^b	1.22 ± 0.34^a	0.93 ± 0.31^a	1.03 ± 0.33^a	1.02 ± 0.38^a	1.25 ± 0.21^a
C22:3n−3	1.05 ± 0.58^a	1.54 ± 0.56^a	1.34 ± 0.44^a	1.85 ± 0.96^a	1.79 ± 1.32^a	3.16 ± 2.86^b	4.76 ± 3.43^b	1.77 ± 0.36^a	2.22 ± 0.76^ab	2.26 ± 1.15^ab	1.60 ± 0.92^a	2.20 ± 1.01^a
C22:5n−3	1.20 ± 0.78^a	1.77 ± 0.73^a	1.58 ± 0.58^a	1.86 ± 1.01^a	1.51 ± 0.83^a	2.50 ± 1.19^b	3.29 ± 2.24^b	1.65 ± 0.39^a	1.66 ± 0.62^a	1.47 ± 0.61^a	1.87 ± 0.50^a	1.89 ± 0.46^a
C22:6n−3	10.37 ± 2.16^b	6.66 ± 2.35^a	7.96 ± 1.86^a	8.51 ± 1.50^a	10.95 ± 3.09^b	11.44 ± 1.41^b	12.34 ± 3.56^b	10.71 ± 2.62^b	9.09 ± 1.57^a	8.77 ± 2.20^a	7.65 ± 1.75^a	9.86 ± 1.66^a
PUFA	38.70 ± 6.26^a	39.11 ± 6.64^a	43.87 ± 4.29^a	43.65 ± 5.28^a	43.41 ± 6.37^a	45.10 ± 4.24^a	49.60 ± 9.19^a	41.81 ± 5.12^a	35.21 ± 3.14^b	36.45 ± 4.37^b	33.88 ± 4.43^b	43.29 ± 4.91^a
UFA	62.92 ± 3.58^a	65.06 ± 9.47^a	72.19 ± 3.69^a	69.23 ± 6.76^a	65.96 ± 2.79^a	65.87 ± 3.05^a	70.37 ± 6.79^a	63.39 ± 6.55^a	56.86 ± 2.83^b	59.29 ± 3.32^b	61.41 ± 2.46^ab	66.30 ± 3.18^a

Results were given as mean ± SD (n = 6). Different letters (a, b, ab and c) in the same row indicate significant differences (p < 0.05).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.