Data/hora: 01/06/2024 10:45:20

Provedor de dados: | 5
País: | France
Título: | Lipid and mercury profiles of 61 mid-trophic species collected off south-eastern Australia
Autores: | Pethybridge, H.; Daley, R.; Virtue, P.; Butler, E. C. V.; Cossa, Daniel; Nichols, P. D.
Data: | 2010
Ano: | 2010
Palavras-chave: | Deep-sea; Ecosystem dynamics; Fatty acids; Lipids; Mercury; Mid-trophic prey; Mid-water.
Resumo: | 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 mu g g(-1) ww) (with highest content found in barracouta (Thyrsites atun) and whiptails (Coelorinchus fasciatus)), compared with cephalopods (0.01 and 0.17 mu g g(-1) ww) and crustaceans (&lt;0.04 mu g g(-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.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00016/12685/9655.pdf

DOI:10.1071/MF09237

Editor: | Csiro Publishing
Relação: | http://archimer.ifremer.fr/doc/00016/12685/
Formato: | application/pdf
Fonte: | Marine And Freshwater Research (1323-1650) (Csiro Publishing), 2010 , Vol. 61 , N. 10 , P. 1092-1108
Fonte: | 2010 Csiro Publishing