Table 5.

Fatty acid composition according to lipid classes (% of total lipid class) in oil extracted from Nephrops head waste from the Clyde Sea area (summer sample) compared to oil extracted from commercially available krill; n.d. not detected.

Fatty Acid (%)	Neutral Lipids		Polar Lipids
	Nephrops	Krill	Nephrops	Krill
14:0	3.3	18.7	1.0	2.2
15:0	0.7	0.6	0.6	0.4
16:0	12.7	23.7	12.6	21.8
18:0	3.4	1.8	6.2	1.6
19:0	0.5	n.d.	0.2	0.2
20:0	0.3	0.2	0.3	n.d.
22:0	0.2	n.d.	n.d.	0.2
Total saturated	21.3	45.1	21.3	26.5
16:1n-9	0.4	1.0	0.8	0.2
16:1n-7	9.6	12.5	5.3	1.9
17:1	0.5	0.4	0.5	0.2
18:1n-9	13.1	18.3	11.7	7.9
18:1n-7	7.2	8.1	5.7	6.8
19:1	0.4	n.d.	0.3	n.d.
20:1n-11	3.3	n.d.	1.3	n.d.
20:1n-9	3.2	1.4	2.1	0.6
20:1n-7	4.6	0.5	2.0	0.2
22:1n-11	2.0	n.d.	0.4	n.d.
22:1n-9	0.9	0.4	n.d.	1.0
24:1n-9	0.3	n.d.	n.d.	0.4
Total monounsaturated	45.5	42.5	30.0	19.3
18:2n-6	1.1	1.3	1.2	2.3
18:3n-6	0.2	0.2	0.3	n.d.
20:2n-6	1.0	n.d.	0.8	n.d.
20:3n-6	0.2	n.d.	n.d.	n.d.
20:4n-6	2.5	0.1	4.0	1.0
22:4n-6	0.5	n.d.	0.5	0.2
22:5n-6	0.4	n.d.	0.3	0.7
Total n-6 PUFA	5.9	1.7	7.1	4.1
18:3n-3	0.3	0.5	0.4	1.0
18:4n-3	0.9	2.1	0.8	1.5
20:3n-3	0.2	n.d.	n.d.	n.d.
20:4n-3	0.4	0.1	0.4	0.4
20:5n-3	15.0	4.3	22.0	26.1
22:5n-3	1.4	0.1	2.1	n.d.
22:6n-3	8.3	2.3	15.4	20.8
Total n-3 PUFA	26.6	9.4	41.3	49.8