Composition of wax esters is linked to diapause behavior of Calanus finmarchicus in a sea loch environment
We studied the seasonal lipid dynamics of Calanus finmarchicus from Loch Etive, a semi-enclosed fjordic environment on the west coast of Scotland, in relation to the diapause behavior of this species. Levels of total lipid and triacylglycerol in individual copepodid stage V (CVs) exhibited clear sea...
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Online Access: | https://pure.uhi.ac.uk/en/publications/b1047d08-f6d7-4b7e-a755-465366a7df9c https://doi.org/10.4319/lo.2012.57.1.0065 |
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ftuhipublicatio:oai:pure.atira.dk:publications/b1047d08-f6d7-4b7e-a755-465366a7df9c 2024-01-28T10:04:59+01:00 Composition of wax esters is linked to diapause behavior of Calanus finmarchicus in a sea loch environment Clark, K. A. J. Brierley, A. S. Pond, D. W. 2012-01-01 https://pure.uhi.ac.uk/en/publications/b1047d08-f6d7-4b7e-a755-465366a7df9c https://doi.org/10.4319/lo.2012.57.1.0065 eng eng info:eu-repo/semantics/restrictedAccess Clark , K A J , Brierley , A S & Pond , D W 2012 , ' Composition of wax esters is linked to diapause behavior of Calanus finmarchicus in a sea loch environment ' , Limnology and Oceanography , vol. 57 , no. 1 , pp. 65-75 . https://doi.org/10.4319/lo.2012.57.1.0065 article 2012 ftuhipublicatio https://doi.org/10.4319/lo.2012.57.1.0065 2024-01-04T23:20:42Z We studied the seasonal lipid dynamics of Calanus finmarchicus from Loch Etive, a semi-enclosed fjordic environment on the west coast of Scotland, in relation to the diapause behavior of this species. Levels of total lipid and triacylglycerol in individual copepodid stage V (CVs) exhibited clear seasonal trends, with highest levels in June and progressively decreasing through late summer to winter. Wax esters in CVs were more variable, but followed a similar pattern. An index of the level of unsaturation of wax esters, effectively an indicator of the levels of polyunsaturated fatty acids in the wax ester reserves, were highest in midsummer and declined progressively through autumn and winter. Fatty acid analysis of total lipid in the CVs confirmed that the amounts of polyunsaturated fatty acids in the wax esters decreased, while amounts of saturated and monounsaturated fatty acids remained comparatively stable. Polyunsaturated wax esters are selectively catabolized by C. finmarchicus during diapause. Previous studies have linked unsaturation of wax esters in calanoid copepods to the initiation of diapause and buoyancy control, and we hypothesize that selective catabolism of polyunsaturated wax esters is linked to the processes of diapause termination and ascent to surface waters. Article in Journal/Newspaper Calanus finmarchicus Copepods University of the Highlands and Islands: Research Database of UHI Limnology and Oceanography 57 1 65 75 |
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Open Polar |
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University of the Highlands and Islands: Research Database of UHI |
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ftuhipublicatio |
language |
English |
description |
We studied the seasonal lipid dynamics of Calanus finmarchicus from Loch Etive, a semi-enclosed fjordic environment on the west coast of Scotland, in relation to the diapause behavior of this species. Levels of total lipid and triacylglycerol in individual copepodid stage V (CVs) exhibited clear seasonal trends, with highest levels in June and progressively decreasing through late summer to winter. Wax esters in CVs were more variable, but followed a similar pattern. An index of the level of unsaturation of wax esters, effectively an indicator of the levels of polyunsaturated fatty acids in the wax ester reserves, were highest in midsummer and declined progressively through autumn and winter. Fatty acid analysis of total lipid in the CVs confirmed that the amounts of polyunsaturated fatty acids in the wax esters decreased, while amounts of saturated and monounsaturated fatty acids remained comparatively stable. Polyunsaturated wax esters are selectively catabolized by C. finmarchicus during diapause. Previous studies have linked unsaturation of wax esters in calanoid copepods to the initiation of diapause and buoyancy control, and we hypothesize that selective catabolism of polyunsaturated wax esters is linked to the processes of diapause termination and ascent to surface waters. |
format |
Article in Journal/Newspaper |
author |
Clark, K. A. J. Brierley, A. S. Pond, D. W. |
spellingShingle |
Clark, K. A. J. Brierley, A. S. Pond, D. W. Composition of wax esters is linked to diapause behavior of Calanus finmarchicus in a sea loch environment |
author_facet |
Clark, K. A. J. Brierley, A. S. Pond, D. W. |
author_sort |
Clark, K. A. J. |
title |
Composition of wax esters is linked to diapause behavior of Calanus finmarchicus in a sea loch environment |
title_short |
Composition of wax esters is linked to diapause behavior of Calanus finmarchicus in a sea loch environment |
title_full |
Composition of wax esters is linked to diapause behavior of Calanus finmarchicus in a sea loch environment |
title_fullStr |
Composition of wax esters is linked to diapause behavior of Calanus finmarchicus in a sea loch environment |
title_full_unstemmed |
Composition of wax esters is linked to diapause behavior of Calanus finmarchicus in a sea loch environment |
title_sort |
composition of wax esters is linked to diapause behavior of calanus finmarchicus in a sea loch environment |
publishDate |
2012 |
url |
https://pure.uhi.ac.uk/en/publications/b1047d08-f6d7-4b7e-a755-465366a7df9c https://doi.org/10.4319/lo.2012.57.1.0065 |
genre |
Calanus finmarchicus Copepods |
genre_facet |
Calanus finmarchicus Copepods |
op_source |
Clark , K A J , Brierley , A S & Pond , D W 2012 , ' Composition of wax esters is linked to diapause behavior of Calanus finmarchicus in a sea loch environment ' , Limnology and Oceanography , vol. 57 , no. 1 , pp. 65-75 . https://doi.org/10.4319/lo.2012.57.1.0065 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.4319/lo.2012.57.1.0065 |
container_title |
Limnology and Oceanography |
container_volume |
57 |
container_issue |
1 |
container_start_page |
65 |
op_container_end_page |
75 |
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1789330983527383040 |