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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:Environment
Objective Group:Climate and Climate Change
Objective Field:Effects of Climate Change and Variability on Antarctic and Sub-Antarctic Environments (excl. Social Impacts)
Author:Pethybridge, HR (Miss Heidi Pethybridge)
Author:Virtue, P (Associate Professor Patti Virtue)
ID Code:68406
Year Published:2010
Web of Science® Times Cited:9
Deposited By:IMAS Research and Education Centre
Deposited On:2011-03-11
Last Modified:2011-05-10
Downloads:0

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