Differences in the sterol composition of dominant antarctic zooplankton
Abstract The composition of free sterols was determined in Antarctic zooplankton species with various feeding behaviors. In the Southern Ocean, the dominant calanoid copepods Calanoides acutus, Calanus propinquus, Metridia gerlachei , and Euchaeta antarctica were investigated during different season...
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crwiley:10.1007/s11745-999-336-1 2024-06-02T07:58:26+00:00 Differences in the sterol composition of dominant antarctic zooplankton Mühlebach, Anneke Albers, Carola Kattner, Gerhard 1999 http://dx.doi.org/10.1007/s11745-999-336-1 https://onlinelibrary.wiley.com/doi/full/10.1007/s11745-999-336-1 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Lipids volume 34, issue 1, page 45-51 ISSN 0024-4201 1558-9307 journal-article 1999 crwiley https://doi.org/10.1007/s11745-999-336-1 2024-05-03T11:13:48Z Abstract The composition of free sterols was determined in Antarctic zooplankton species with various feeding behaviors. In the Southern Ocean, the dominant calanoid copepods Calanoides acutus, Calanus propinquus, Metridia gerlachei , and Euchaeta antarctica were investigated during different seasons and compared with the euphausiids Euphausia superba, E. crystallorophias , and Thysanoessa macrura . In addition, the Arctic copepods Calanus hyperboreus, C. glacialis , and C. finmarchicus were studied for comparison. Analyses were performed using gas chromatography and mass spectrometry. The zooplankton species exhibited a simple sterol content of up to six sterols. In the copepods, cholest‐5‐en‐3β‐ol (22.1 to 60.5%, range of sample means), cholesta‐5,24‐dien‐3β‐ol (22.3 to 45.2%), and cholesta‐5,22 E ‐dien‐3β‐ol (4.3 to 33.4%) contributed most, while in euphausiids the sterol composition was less complex with cholest‐5‐en‐3β‐ol always accounting for more than 75% of the total. Although sterols are membrane constituents and are expected not to vary considerably, differences in the abundance of sterols were observed between the species and the seasons. In herbivorous copepods, cholesta‐5,24‐dien‐3β‐ol increased by a factor of 1.5 to about 45% during the main feeding period in summer; this sterol is a metabolic precursor of cholest‐5‐en‐3β‐ol in the process of the dealkylation of dietary C‐24 alkylated phytosterols. Cholest‐5‐en‐3β‐ol decreased by the same proportion. Omnivorous and carnivorous copepods showed average levels of cholesta‐5,24‐dien‐3β‐ol below 25%. These changes in sterol composition between copepod species seem to reflect their different feeding modes. Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic Calanus hyperboreus Euphausia superba Southern Ocean Thysanoessa macrura Zooplankton Copepods Wiley Online Library Antarctic Arctic Southern Ocean Lipids 34 1 45 51 |
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Wiley Online Library |
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language |
English |
description |
Abstract The composition of free sterols was determined in Antarctic zooplankton species with various feeding behaviors. In the Southern Ocean, the dominant calanoid copepods Calanoides acutus, Calanus propinquus, Metridia gerlachei , and Euchaeta antarctica were investigated during different seasons and compared with the euphausiids Euphausia superba, E. crystallorophias , and Thysanoessa macrura . In addition, the Arctic copepods Calanus hyperboreus, C. glacialis , and C. finmarchicus were studied for comparison. Analyses were performed using gas chromatography and mass spectrometry. The zooplankton species exhibited a simple sterol content of up to six sterols. In the copepods, cholest‐5‐en‐3β‐ol (22.1 to 60.5%, range of sample means), cholesta‐5,24‐dien‐3β‐ol (22.3 to 45.2%), and cholesta‐5,22 E ‐dien‐3β‐ol (4.3 to 33.4%) contributed most, while in euphausiids the sterol composition was less complex with cholest‐5‐en‐3β‐ol always accounting for more than 75% of the total. Although sterols are membrane constituents and are expected not to vary considerably, differences in the abundance of sterols were observed between the species and the seasons. In herbivorous copepods, cholesta‐5,24‐dien‐3β‐ol increased by a factor of 1.5 to about 45% during the main feeding period in summer; this sterol is a metabolic precursor of cholest‐5‐en‐3β‐ol in the process of the dealkylation of dietary C‐24 alkylated phytosterols. Cholest‐5‐en‐3β‐ol decreased by the same proportion. Omnivorous and carnivorous copepods showed average levels of cholesta‐5,24‐dien‐3β‐ol below 25%. These changes in sterol composition between copepod species seem to reflect their different feeding modes. |
format |
Article in Journal/Newspaper |
author |
Mühlebach, Anneke Albers, Carola Kattner, Gerhard |
spellingShingle |
Mühlebach, Anneke Albers, Carola Kattner, Gerhard Differences in the sterol composition of dominant antarctic zooplankton |
author_facet |
Mühlebach, Anneke Albers, Carola Kattner, Gerhard |
author_sort |
Mühlebach, Anneke |
title |
Differences in the sterol composition of dominant antarctic zooplankton |
title_short |
Differences in the sterol composition of dominant antarctic zooplankton |
title_full |
Differences in the sterol composition of dominant antarctic zooplankton |
title_fullStr |
Differences in the sterol composition of dominant antarctic zooplankton |
title_full_unstemmed |
Differences in the sterol composition of dominant antarctic zooplankton |
title_sort |
differences in the sterol composition of dominant antarctic zooplankton |
publisher |
Wiley |
publishDate |
1999 |
url |
http://dx.doi.org/10.1007/s11745-999-336-1 https://onlinelibrary.wiley.com/doi/full/10.1007/s11745-999-336-1 |
geographic |
Antarctic Arctic Southern Ocean |
geographic_facet |
Antarctic Arctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Arctic Calanus hyperboreus Euphausia superba Southern Ocean Thysanoessa macrura Zooplankton Copepods |
genre_facet |
Antarc* Antarctic Antarctica Arctic Calanus hyperboreus Euphausia superba Southern Ocean Thysanoessa macrura Zooplankton Copepods |
op_source |
Lipids volume 34, issue 1, page 45-51 ISSN 0024-4201 1558-9307 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1007/s11745-999-336-1 |
container_title |
Lipids |
container_volume |
34 |
container_issue |
1 |
container_start_page |
45 |
op_container_end_page |
51 |
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