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 leve...
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crwiley:10.4319/lo.1998.43.8.1894 2024-03-24T08:57:41+00:00 Lipid metabolism of the Antarctic euphausiid Thysanmssa macrura and its ecological implications Hagen, Wilhelm Kattner, Gerhard 1998 http://dx.doi.org/10.4319/lo.1998.43.8.1894 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1998.43.8.1894 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1998.43.8.1894 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 43, issue 8, page 1894-1901 ISSN 0024-3590 1939-5590 Aquatic Science Oceanography journal-article 1998 crwiley https://doi.org/10.4319/lo.1998.43.8.1894 2024-02-28T02:16:34Z 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 phospholipids. Other important fatty acids were 14:0 and 18:1(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 18:1(n‐9) and 18:1(n‐7) and of 20:1 (n‐9). The dominance of 18:1 alcohols in T. macrura is unique among marine plankton. All fatty 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 specimens. T. macrura has developed quantitative and qualitative energetic adaptations to cope with the pronounced seasonal variability in feeding conditions and reproductive requirements. Article in Journal/Newspaper Antarc* Antarctic Thysanoessa macrura Weddell Sea Wiley Online Library Antarctic The Antarctic Weddell Sea Weddell Limnology and Oceanography 43 8 1894 1901 |
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Wiley Online Library |
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English |
topic |
Aquatic Science Oceanography |
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Aquatic Science Oceanography Hagen, Wilhelm Kattner, Gerhard Lipid metabolism of the Antarctic euphausiid Thysanmssa macrura and its ecological implications |
topic_facet |
Aquatic Science Oceanography |
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 phospholipids. Other important fatty acids were 14:0 and 18:1(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 18:1(n‐9) and 18:1(n‐7) and of 20:1 (n‐9). The dominance of 18:1 alcohols in T. macrura is unique among marine plankton. All fatty 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 specimens. T. macrura has developed quantitative and qualitative energetic adaptations to cope with the pronounced seasonal variability in feeding conditions and reproductive requirements. |
format |
Article in Journal/Newspaper |
author |
Hagen, Wilhelm Kattner, Gerhard |
author_facet |
Hagen, Wilhelm Kattner, Gerhard |
author_sort |
Hagen, Wilhelm |
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 |
publisher |
Wiley |
publishDate |
1998 |
url |
http://dx.doi.org/10.4319/lo.1998.43.8.1894 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1998.43.8.1894 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1998.43.8.1894 |
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 |
Limnology and Oceanography volume 43, issue 8, page 1894-1901 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1998.43.8.1894 |
container_title |
Limnology and Oceanography |
container_volume |
43 |
container_issue |
8 |
container_start_page |
1894 |
op_container_end_page |
1901 |
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1794408036485300224 |