Lipids and buoyancy in Southern Ocean pteropods
Abstract The lipids of Clione limacina , a Southern Ocean pteropod (order Gymnosomata), contain 28% diacylglyceryl ether (DAGE) (as percentage of total lipid) whereas the pteropod Limacina helicina (order Thecosomata) lacks DAGE. The alkyl glyceryl ether diols (1‐ O ‐alkyl glycerols, GE) of Clione D...
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crwiley:10.1007/s11745-997-0141-x 2024-09-30T14:33:50+00:00 Lipids and buoyancy in Southern Ocean pteropods Phleger, Charles F. Nichols, Peter D. Virtue, Patti 1997 http://dx.doi.org/10.1007/s11745-997-0141-x https://onlinelibrary.wiley.com/doi/full/10.1007/s11745-997-0141-x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Lipids volume 32, issue 10, page 1093-1100 ISSN 0024-4201 1558-9307 journal-article 1997 crwiley https://doi.org/10.1007/s11745-997-0141-x 2024-09-05T05:04:23Z Abstract The lipids of Clione limacina , a Southern Ocean pteropod (order Gymnosomata), contain 28% diacylglyceryl ether (DAGE) (as percentage of total lipid) whereas the pteropod Limacina helicina (order Thecosomata) lacks DAGE. The alkyl glyceryl ether diols (1‐ O ‐alkyl glycerols, GE) of Clione DAGE are dominated by 16∶0 (60%) and 15∶0 (21%), in contrast with deep‐sea shark liver DAGE, which is dominated by 18∶1 GE. The fatty acid profiles of Clione and Limacina are similar (28–32% polyunsaturated, 26–34% monounsaturated) as are the sterols, which include 24‐methylenecholesterol, transdehydrocholesterol, cholesterol, and desmosterol. This finding probably reflects the fact that Limacina is the major food source for Clione. Spongiobranchaea australis , another Southern Ocean pteropod (order Gymnosomata), has 0.9–1.7% DAGE, but has less lipid (3.3–4.8 mg/g lipid, wet weight) than Clione (50.8 mg/g lipid, wet weight). We propose a buoyancy role for DAGE in Clione since Limacina has bubbles for flotation which Clione lack; DAGE provides 23% more uplift than triacylglycerol at a concentration of 1.025 g/mL seawater. Article in Journal/Newspaper Clione limacina Limacina helicina Southern Ocean Wiley Online Library Southern Ocean Lipids 32 10 1093 1100 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The lipids of Clione limacina , a Southern Ocean pteropod (order Gymnosomata), contain 28% diacylglyceryl ether (DAGE) (as percentage of total lipid) whereas the pteropod Limacina helicina (order Thecosomata) lacks DAGE. The alkyl glyceryl ether diols (1‐ O ‐alkyl glycerols, GE) of Clione DAGE are dominated by 16∶0 (60%) and 15∶0 (21%), in contrast with deep‐sea shark liver DAGE, which is dominated by 18∶1 GE. The fatty acid profiles of Clione and Limacina are similar (28–32% polyunsaturated, 26–34% monounsaturated) as are the sterols, which include 24‐methylenecholesterol, transdehydrocholesterol, cholesterol, and desmosterol. This finding probably reflects the fact that Limacina is the major food source for Clione. Spongiobranchaea australis , another Southern Ocean pteropod (order Gymnosomata), has 0.9–1.7% DAGE, but has less lipid (3.3–4.8 mg/g lipid, wet weight) than Clione (50.8 mg/g lipid, wet weight). We propose a buoyancy role for DAGE in Clione since Limacina has bubbles for flotation which Clione lack; DAGE provides 23% more uplift than triacylglycerol at a concentration of 1.025 g/mL seawater. |
format |
Article in Journal/Newspaper |
author |
Phleger, Charles F. Nichols, Peter D. Virtue, Patti |
spellingShingle |
Phleger, Charles F. Nichols, Peter D. Virtue, Patti Lipids and buoyancy in Southern Ocean pteropods |
author_facet |
Phleger, Charles F. Nichols, Peter D. Virtue, Patti |
author_sort |
Phleger, Charles F. |
title |
Lipids and buoyancy in Southern Ocean pteropods |
title_short |
Lipids and buoyancy in Southern Ocean pteropods |
title_full |
Lipids and buoyancy in Southern Ocean pteropods |
title_fullStr |
Lipids and buoyancy in Southern Ocean pteropods |
title_full_unstemmed |
Lipids and buoyancy in Southern Ocean pteropods |
title_sort |
lipids and buoyancy in southern ocean pteropods |
publisher |
Wiley |
publishDate |
1997 |
url |
http://dx.doi.org/10.1007/s11745-997-0141-x https://onlinelibrary.wiley.com/doi/full/10.1007/s11745-997-0141-x |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Clione limacina Limacina helicina Southern Ocean |
genre_facet |
Clione limacina Limacina helicina Southern Ocean |
op_source |
Lipids volume 32, issue 10, page 1093-1100 ISSN 0024-4201 1558-9307 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1007/s11745-997-0141-x |
container_title |
Lipids |
container_volume |
32 |
container_issue |
10 |
container_start_page |
1093 |
op_container_end_page |
1100 |
_version_ |
1811637618686820352 |