Lipid metabolism of the Antarctic euphausiid Thysanmssa macrura and its ecological implications
The lipid biochemistry of one of the dominant Antarctic euphausiids, Thysanoessa macrura, was investigated in the Weddell Sea. Ontogenetic stages from furciliae to adults were collected during all seasons. Total lipid contents of these stages ranged from 5.5 % to 60.5 % of dry mass, with minimum lev...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.483.295 2023-05-15T13:34:09+02:00 Lipid metabolism of the Antarctic euphausiid Thysanmssa macrura and its ecological implications Wilhelm Hagen The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.483.295 http://www.aslo.org/lo/toc/vol_43/issue_8/1894.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.483.295 http://www.aslo.org/lo/toc/vol_43/issue_8/1894.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.aslo.org/lo/toc/vol_43/issue_8/1894.pdf text ftciteseerx 2016-01-08T08:02:03Z The lipid biochemistry of one of the dominant Antarctic euphausiids, Thysanoessa macrura, was investigated in the Weddell Sea. Ontogenetic stages from furciliae to adults were collected during all seasons. Total lipid contents of these stages ranged from 5.5 % to 60.5 % of dry mass, with minimum levels in late winter/early spring (October/ November) and maximum levels in autumn (April/May). Accordingly, wax esters, the primary storage lipid in T. macrura, also varied seasonally and reached a mean value of 66.6 % of total lipid in autumn. Although lipid reserves are used partly for overwintering, the adults invest considerable amounts of these stores in reproductive processes such as gonad maturation, egg production, and mating in late winter prior to the vernal phytoplankton bloom’. Total lipids were dominated by the fatty acids 16: 0, 20: 5(n-3), and 22: 6(n-3), the principal components of the phos-pholipids. Other important fatty acids were 14: 0 and 18: l(n-9), which together with 16: 0 prevailed in the wax esters. The alcohol moieties of the wax esters consisted of>90 % of the isomers 18: l(n-9) and 18: l(n-7) and of 20: 1 (n-9). The dominance of 18: 1 alcohols in T. macrura is unique among marine plankton. All faatty acids and alcohols exhibited linear relationships with increasing total lipid mass and with total lipid content, irrespective of the developmental stage, sex, region, or season. The fatty acids 16: 0, 14: 0, and 20: 5(n-3) and the two 18: 1 fatty alcohol isomers had the highest accumulation rates, which explains their seasonal dominance in the lipid-rich Text Antarc* Antarctic Thysanoessa macrura Weddell Sea Unknown Antarctic The Antarctic Weddell Sea Weddell |
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English |
description |
The lipid biochemistry of one of the dominant Antarctic euphausiids, Thysanoessa macrura, was investigated in the Weddell Sea. Ontogenetic stages from furciliae to adults were collected during all seasons. Total lipid contents of these stages ranged from 5.5 % to 60.5 % of dry mass, with minimum levels in late winter/early spring (October/ November) and maximum levels in autumn (April/May). Accordingly, wax esters, the primary storage lipid in T. macrura, also varied seasonally and reached a mean value of 66.6 % of total lipid in autumn. Although lipid reserves are used partly for overwintering, the adults invest considerable amounts of these stores in reproductive processes such as gonad maturation, egg production, and mating in late winter prior to the vernal phytoplankton bloom’. Total lipids were dominated by the fatty acids 16: 0, 20: 5(n-3), and 22: 6(n-3), the principal components of the phos-pholipids. Other important fatty acids were 14: 0 and 18: l(n-9), which together with 16: 0 prevailed in the wax esters. The alcohol moieties of the wax esters consisted of>90 % of the isomers 18: l(n-9) and 18: l(n-7) and of 20: 1 (n-9). The dominance of 18: 1 alcohols in T. macrura is unique among marine plankton. All faatty acids and alcohols exhibited linear relationships with increasing total lipid mass and with total lipid content, irrespective of the developmental stage, sex, region, or season. The fatty acids 16: 0, 14: 0, and 20: 5(n-3) and the two 18: 1 fatty alcohol isomers had the highest accumulation rates, which explains their seasonal dominance in the lipid-rich |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Wilhelm Hagen |
spellingShingle |
Wilhelm Hagen Lipid metabolism of the Antarctic euphausiid Thysanmssa macrura and its ecological implications |
author_facet |
Wilhelm Hagen |
author_sort |
Wilhelm Hagen |
title |
Lipid metabolism of the Antarctic euphausiid Thysanmssa macrura and its ecological implications |
title_short |
Lipid metabolism of the Antarctic euphausiid Thysanmssa macrura and its ecological implications |
title_full |
Lipid metabolism of the Antarctic euphausiid Thysanmssa macrura and its ecological implications |
title_fullStr |
Lipid metabolism of the Antarctic euphausiid Thysanmssa macrura and its ecological implications |
title_full_unstemmed |
Lipid metabolism of the Antarctic euphausiid Thysanmssa macrura and its ecological implications |
title_sort |
lipid metabolism of the antarctic euphausiid thysanmssa macrura and its ecological implications |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.483.295 http://www.aslo.org/lo/toc/vol_43/issue_8/1894.pdf |
geographic |
Antarctic The Antarctic Weddell Sea Weddell |
geographic_facet |
Antarctic The Antarctic Weddell Sea Weddell |
genre |
Antarc* Antarctic Thysanoessa macrura Weddell Sea |
genre_facet |
Antarc* Antarctic Thysanoessa macrura Weddell Sea |
op_source |
http://www.aslo.org/lo/toc/vol_43/issue_8/1894.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.483.295 http://www.aslo.org/lo/toc/vol_43/issue_8/1894.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766049314584395776 |