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Lipid composition and partitioning of deepwater chondrichthyans: inferences of feeding ecology and distribution
Citation
Pethybridge, HR and Daley, R and Virtue, P and Nichols, PD, Lipid composition and partitioning of deepwater chondrichthyans: inferences of feeding ecology and distribution, Marine Biology: International Journal on Life in Oceans and Coastal Waters, 157, (6) pp. 1367-1384. ISSN 0025-3162 (2010) [Refereed Article]
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Copyright Statement
The final publication is available at http://www.springerlink.com
Official URL: http://www.springerlink.com/content/t57g218h02025m...
DOI: doi:10.1007/s00227-010-1416-6
Abstract
The composition of lipids and fatty acids was
determined for the livers, muscle, pancreas, kidney and
stomach Xuids of deepwater chondrichthyan species
(including 11 squaliformes, 3 chimaeriformes, 1 hexanchiforme
and 3 carcharhiniformes) caught as bycatch from
continental waters oV south-eastern Australia. The lipid
class, fatty acid and fatty alcohol composition diVered
markedly in each tissue and in each species. The lipid and
fatty acid composition of large, lipid-rich (3870% wet
weight, ww) livers demonstrated the multifunctional role of
this organ in: lipid distribution, storage and biosynthesis,
and buoyancy regulation. In the liver, the importance of
certain lipids (including squalene, diacylglyceryl ethers,
triacylglycerols and to a lesser extent wax esters) as mediators
of buoyancy varied according to lifestyle and habitat.
Less variability was observed in the muscle proWles, characterized
by low lipid content (<1.0% ww) and high relative
levels of polar lipids (>70%). The lipid and fatty acid
proWles of the kidney and pancreas showed the highest
intraspeciWc variability, suggesting these organs also have
complex roles in lipid storage and metabolism. Overall
intra- and interspeciWc diVerences in the tissue fatty acid
proWles could be related to diVerences in a number of
factors including phylogeny, habitat (depth), buoyancy
regulation and diet and presumably also reXect diVerent
ecological roles. The lipid and fatty acid proWles are the
Wrst published for Rhinochimaera paciWca, Chimaera
lignaria and Figaro boardmani and the Wrst to demonstrate
interspeciWc variation in lipid proWles of various tissues of
deepwater chondrichthyans. The application of multivariate
analysis to lipid class and fatty acid tissue proWles in chondrichthyans
inferred dietary diVerences and metabolic preferences
between species and habitats. These results have
important implications for the future use of fatty acids as
dietary tracers in chondrichthyan research.
Item Details
Item Type: | Refereed Article |
---|---|
Research Division: | Biological Sciences |
Research Group: | Ecology |
Research Field: | Marine and estuarine ecology (incl. marine ichthyology) |
Objective Division: | Environmental Management |
Objective Group: | Marine systems and management |
Objective Field: | Marine biodiversity |
UTAS Author: | Pethybridge, HR (Miss Heidi Pethybridge) |
UTAS Author: | Virtue, P (Associate Professor Patti Virtue) |
ID Code: | 68439 |
Year Published: | 2010 |
Web of Science® Times Cited: | 52 |
Deposited By: | IMAS Research and Education Centre |
Deposited On: | 2011-03-11 |
Last Modified: | 2011-05-10 |
Downloads: | 2 View Download Statistics |
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