Table 3.

Fatty acid composition (% of total fatty acids) in oil extracted from Nephrops head waste sampled from the Clyde Sea area at different times of the year; n.d. not detected.

Fatty Acid (%)	Winter	Spring	Summer	Autumn
14:0	1.1	1.4	1.6	1.7
15:0	0.7	0.6	0.6	0.6
16:0	12.5	12.1	12.6	13.6
18:0	4.2	3.8	3.9	4.1
19:0	0.2	0.2	0.2	0.2
20:0	0.4	0.4	0.2	0.4
22:0	0.1	0.4	n.d.	0.4
Total saturated	22.9	22.2	22.0	24.4
16:1n-9	0.2	0.2	0.3	0.3
16:1n-7	5.6	6.6	7.3	6.2
17:1	0.8	0.6	0.6	0.6
18:1n-9	14.8	13.3	13.0	13.0
18:1n-7	8.3	7.8	7.8	8.3
19:1	0.3	0.4	0.4	0.4
20:1n-11	4.1	3.1	3.4	3.1
20:1n-9	3.8	3.1	2.6	3.1
20:1n-7	5.7	4.5	4.5	4.2
22:1n-11	1.0	1.2	0.5	0.9
22:1n-9	0.6	0.7	0.5	0.9
22:1n-7	1.3	1.0	0.8	1.0
Total monounsaturated	46.5	42.4	41.8	42.1
18:2n-6	0.7	0.7	0.8	0.9
18:3n-6	0.2	0.2	0.1	n.d.
20:2n-6	1.2	1.1	1.0	1.0
20:3n-6	0.2	0.1	0.1	0.2
20:4n-6	4.0	3.8	3.8	3.4
22:4n-6	0.7	0.6	0.8	0.8
22:5n-6	0.6	0.5	0.4	0.5
Total n-6 PUFA	7.6	7.0	7.1	6.7
18:3n-3	0.2	0.2	0.2	0.3
18:4n-3	0.3	0.7	0.8	0.7
20:3n-3	0.2	0.2	0.2	0.2
20:4n-3	0.3	0.4	0.4	0.4
20:5n-3	10.5	13.9	15.5	13.1
22:5n-3	1.8	1.7	2.1	2.0
22:6n-3	8.5	9.6	8.4	8.5
Total n-3 PUFA	21.7	26.5	27.6	25.2