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| Comparative analysis of the lipid compositions of Antarctic krill (Euphausia superba) with different body lengths |
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| DOI： |
| KeyWord:Antarctic krill (Euphausia superba) body length lipid composition multivariate statistical analysis |
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| Author Name | Affiliation | | LI Yating1,2, LIU Xiaofang2, JIANG Wei1, WANG Xinliang2, YING Yiping2, LENG Kailiang2,3 | 1.National Engineering Research Center for Marine Aquaculture， Zhejiang Ocean University, Zhoushan 316022，Zhejiang, China
2.Key Laboratory of Sustainable Development of Polar Fisheries, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, Shandong, China
3.Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266200, Shandong, China |
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| Abstract: |
| The lipid compositions of Antarctic krill (Euphausia superba) with different body lengths were comparatively studied to provide scientific guidance for the fishery harvesting and land-based accurate utilization of the Antarctic krill. Antarctic krill samples were divided into four groups according to the body lengths (＜30 mm, 30-40 mm, 40-50 mm, ＞50 mm), and the lipid content, glyceride content, phospholipid content, cholesterol content, free fatty acid content, phospholipid composition as well as fatty acid composition of the samples were used as evalution indicators, the differences of the lipid compositions of the four group samples were compared combined with multivariate statistical analysis technology. The results showed that the lipid contents of the Antarctic krill with different body lengths were (17.57±2.43)% -(24.35±0.31)% of dry basis. Glyceride and phospholipid were the main lipid components, accounting for (41.40±1.22)%-(43.54±2.02)% and (39.70±0.70)%-(41.89±2.69)% of the lipid, respectively. Phospholipid was mainly composed of phosphatidylcholine (PC), phosphatidylethanolamine (PE) and lysophosphatidylcholine(LPC), accounting for (80.04±0.73)%-(85.94±0.58)%, (13.13±0.59)%-(19.17±0.75)%, and (0.79±0.05)%-(1.16±0.03)% of the total phospholipid, respectively. The fatty acids of the lipid were mainly C14∶0, C16∶0, C18∶1, C20∶5 (EPA) and C22∶6 (DHA), accounting for (12.00±0.34)%-(12.85±0.15)%, (24.64±0.15)%-(27.11±0.16)%, (13.21±0.35)%-(15.09±0.14)%, (18.41±0.18)%-(18.86±0.56)%, (10.17±0.18)%-(12.84±0.16)% of the total fatty acids, respectively. There were overall significant differences in the lipid contents, the ratios of PC and PE in phospholipid, the ratios of C16∶0, C18∶1 and DHA in total fatty acids of the Antarctic krill with different body lengths (p＜0.05). Antarctic krill samples could be obviously divided into three categories ＜30 mm,30-40 mm,＞40 mm by the cluster analysis and principal component analysis according to body length. In conclusion, the lipid composition of Antarctic krill is significantly related to the body length. |
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