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Lipid and mercury profiles of 61 mid-trophic species collected off south-eastern Australia
Citation
Pethybridge, HR and Daley, R and Virtue, P and Butler, ECV and Cossa, D and Nichols, PD, Lipid and mercury profiles of 61 mid-trophic species collected off south-eastern Australia, Marine and Freshwater Research, 61, (10) pp. 1092-1108. ISSN 1323-1650 (2010) [Refereed Article]
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Copyright Statement
Copyright © 2010 CSIRO
Official URL: http://www.publish.csiro.au
DOI: doi:10.1071/MF09237
Abstract
Total mercury (Hg) concentrations and lipid composition data, including fatty acid profiles, for 61 midtrophic
species (fish, cephalopods, crustaceans) collected from continental slope waters off south-east Australia were
examined. Overall, Hg concentrations were greatest in fish (0.01-0.30 mgg
-1 ww) (with highest content found in
barracouta (Thyrsites atun) and whiptails (Coelorinchus fasciatus)), compared with cephalopods (0.01 and 0.17 mgg
-1
ww) and crustaceans (o0.04 mgg
-1 ww). Lipid composition varied between species and within habitat (mesopelagic,
bathypelagic and benthic). Mean total lipid content ranged from 0.5 to 13.2% ww, and in most species was dominated by
triacylglycerols and phospholipids. In fish and squid, fatty acids were generally dominated by monounsaturated fatty
acids, whereas crustaceans were higher in polyunsaturated fatty acids. Multidimensional scaling analyses separated
species into groupings according to their fatty acid composition that could be interpreted with taxonomic, trophic and
habitat information. Discriminant function analyses indicated the most influential (predictor) fatty acids for each group.
Biochemical profile classifications can be used in wider trophodynamic studies to understand contaminant transfer,
trophic relationships and community dynamics in marine environments.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | deep-sea, ecosystem dynamics, fatty acids, lipids, mercury, mid-trophic prey, mid-water. |
| Research Division: | Biological Sciences |
| Research Group: | Ecology |
| Research Field: | Marine and estuarine ecology (incl. marine ichthyology) |
| Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
| Objective Group: | Understanding climate change |
| Objective Field: | Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts) |
| UTAS Author: | Pethybridge, HR (Miss Heidi Pethybridge) |
| UTAS Author: | Virtue, P (Associate Professor Patti Virtue) |
| ID Code: | 68406 |
| Year Published: | 2010 |
| Web of Science® Times Cited: | 22 |
| Deposited By: | IMAS Research and Education Centre |
| Deposited On: | 2011-03-11 |
| Last Modified: | 2022-08-23 |
| Downloads: | 0 |
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