Lipids of Antarctic Ocean amphipods: food chain interactions and the occurrence of novel biomarkers
By M. M. Nelson, B. Mooney, P. Nichols, C. F. Phleger. 2001
125 citations recorded by the source corpus.
Abstract Antarctic hyperiid ( Themisto gaudichaudi , Hyperia macrocephalus , and Primno macropa ) and gammarid amphipods ( Eusirus perdentatus and Orchomene rossi ) were collected near Elephant Island, located in the South Shetland Islands, during January and February 1997 and 1998. Polar lipid (PL) was the major lipid class in all amphipods (58–88% of total lipid), except for T. gaudichaudi in which triacylglycerol (TAG) was dominant (62%). Cholesterol was the major sterol in the gammarid amphipods (89–91% of total sterols), and the hyperiid P. macropa (70%). The hyperiids T. gaudichaudi and H. macrocephalus had a more diverse sterol composition including trans -dehydrocholesterol, desmosterol, 24-nordehydrocholesterol, 24-methylcholest-5,22 E -dien-3β-ol, 24-methylenecholesterol, and stanols (mostly cholestanol). Eicosapentaenoic acid [EPA, 20:5( n −3)] and docosahexaenoic acid [DHA, 22:6( n −3)] were the major polyunsaturated fatty acids (PUFA) in all amphipods. The PUFA octadecapentaenoic acid [18:5( n −3)] was not detected in 1997 samples, but comprised 0.3–1.2% in all 1998 samples. The PUFA 18:4( n −3) comprised 0.2–4.2% in all samples from both years. Very long chain PUFA (VLC-PUFA) (C 24 and C 26 ) were not detected in the one 1997 sample but comprised 0.6–2.8% of total fatty acids in almost all 1998 amphipods. Monounsaturated fatty acids included 18:1( n −9)c, 18:1( n −7)c, and 16:1( n −7)c. Principal saturated fatty acids in all amphipods were 16:0, 14:0, and 18:0. Examination of biomarker lipids has helped clarify trophic interactions for these Antarctic amphipods, and revealed annual differences in their food sources.
Subfields: Aquatic Science, Molecular Biology, Nutrition and Dietetics
View Paper: https://www.semanticscholar.org/paper/b712dc3e61343f4b695328d1f8a478e96e4858c7
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In Aquatic Science
Citations in the corpus
- Lipid and Fatty Acid Compositions of Mytilus galloprovincialis Cultured in the Mar Grande of Taranto (Southern Italy): Feeding Strategies and Trophic Relationships (2010, background): “Another ratio with the potential to differentiate between these 2 food sources is 20:5ω3/22:6ω3 (Nelson et al. 2001, Phleger et al. 2002).”
- Trophic position of Antarctic amphipods — enhanced analysis by a 2-dimensional biomarker assay (2005, background): “Likewise, there are limited lipid studies of Antarctic benthic amphipods (Nelson et al. 2001, Graeve et al. 2001).”
- Fatty acid composition of lipid-rich myctophids and mackerel icefish (Champsocephalus gunnari) – Southern Ocean food-web implications (2002, background): “fraseri) were also higher in specimens inhabiting waters east of the Kerguelen Archipelago, while fish from the Macquarie Ridge contained higher levels of 20:5x3 (EPA) and 22:6x3 (DHA), which are known to be typical of crustaceans such as hyperiid amphipods and polychaetes (Phleger et al. 1998, 2000”
- Lipid biomarkers indicate different ecological niches and trophic relationships of the Arctic hyperiid amphipods Themisto abyssorum and T.libellula (2002, background): “Several Antarctic amphipod species, including the hyperiid Hyperia macrocephalus, as well as the gammarids Eusirus perdentatus and Orchomene rossi, contained only traces of 1.3% of WE.”