eCite Digital Repository
Lipids and Buoyancy in Southern Ocean Pteropods
Citation
Phleger, C and Nichols, P and Virtue, P, Lipids and Buoyancy in Southern Ocean Pteropods, Lipids, 32, (10) pp. 1093-1100. ISSN 0024-4201 (1997) [Refereed Article]
Copyright Statement
Copyright 1997 AOCS Press
DOI: doi:10.1007/s11745-997-0141-x
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
(2832% polyunsaturated, 2634% 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 0.91.7% DAGE,
but has less lipid (3.34.8 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.
Item Details
Item Type: | Refereed Article |
---|---|
Keywords: | Lipids, Buoyancy, Pteropods |
Research Division: | Biological Sciences |
Research Group: | Ecology |
Research Field: | Marine and estuarine ecology (incl. marine ichthyology) |
Objective Division: | Environmental Management |
Objective Group: | Management of Antarctic and Southern Ocean environments |
Objective Field: | Biodiversity in Antarctic and Southern Ocean environments |
UTAS Author: | Virtue, P (Associate Professor Patti Virtue) |
ID Code: | 90440 |
Year Published: | 1997 |
Web of Science® Times Cited: | 52 |
Deposited By: | IMAS Research and Education Centre |
Deposited On: | 2014-04-03 |
Last Modified: | 2014-07-02 |
Downloads: | 0 |
Repository Staff Only: item control page