Table 4.
Lipid class (% of total lipid) in oil extracted from Nephrops head waste from the Clyde Sea area (summer sample) compared to oil extracted from commercially available krill. Values represent mean ± SEM (n = 3 Nephrops and n = 2 krill); n.d. not detected.
| Lipid Class (% Total Lipid) | Nephrops | Krill |
|---|---|---|
| Sterol esters | 3.85 ± 0.01 | 5.60 ± 0.55 |
| Triacylglycerols | 33.93 ± 2.52 | 37.99 ± 1.77 |
| Free fatty acids | 14.99 ± 0.43 | 9.90 ± 0.44 |
| Cholesterol/sterols | 14.89 ± 0.89 | 10.53 ± 0.58 |
| Unknown neutral lipid ¶ | 0.57 ± 0.17 | 3.48 ± 0.11 |
| Total neutral lipids | 68.23 ± 1.01 | 67.49 ± 0.30 |
| Monogalactosyldiacylglycerols | n.d. | n.d. |
| Unknown glycolipid | n.d. | n.d. |
| Digalactosyldiacylglycerols | n.d. | n.d. |
| Unknown polar lipid * | n.d. | 1.22 ± 0.05 |
| Phosphatidylethanolamine | 7.42 ± 0.05 | 6.70 ± 0.11 |
| Phosphatidic acid/Phosphatidylglycerol/cardiolipin | 1.50 ± 0.06 | 1.52 ± 0.18 |
| Phosphatidylinositol | 2.42 ± 0.03 | 1.29 ± 0.11 |
| Phosphatidylserine | 2.65 ± 0.20 | 0.90 ± 0.17 |
| Phosphatidylcholine | 14.04 ± 0.76 | 18.01 ± 0.72 |
| Sphingomyelin | 1.15 ± 0.18 | n.d. |
| Lysophosphatidylcholine | 1.11 ± 0.15 | 2.49 ± 0.26 |
| Pigmented material | 1.48 ± 0.06 | 0.39 ± 0.13 |
| Total polar lipids | 31.77 ± 1.01 | 32.51 ± 0.30 |
* Possibly Sulfolipid; ¶ Possibly diacylglycerol.