期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 423, 期 -, 页码 84-94出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2012.02.007
关键词
Trace metals; Body size; Flounder; Sediment contamination; Pollution; Fish aging
资金
- Australian Research Council
- Canadian National Sciences and Engineering Research Council
- Bluescope Steel Company
- Animal Care and Ethics Committee of the University of New South Wales [09/110A]
Several studies have described strong relationships between body size and the accumulation of trace metals in animal tissues. However, few of these studies have utilized aging techniques to control for age related effects. We utilized relative body size (g y(-1)) of a model flounder species, Pseudorhombus jenynsii, in order to control for age related effects on growth and size measurements. We investigated links between relative body size, concentrations of trace metals in flounder muscle tissue, physico-chemical variables (temperature, salinity, pH, and turbidity), and levels of trace metals in the sediment. Flounder were sampled using an otter trawl net in the inner areas of eight estuaries that were either heavily modified or relatively unmodified by urbanization and industrial activity. Our results indicate that this commonly eaten fish is accumulating significant levels of some trace metals in their muscle tissue, both in relatively unmodified and heavily modified estuaries. Concentrations of Cu, Zn and Fe in muscle tissue, as well as temperature, showed a negative relationship to the relative body size of flounder. In contrast, Se and Hg in muscle showed a positive relationship to relative body size. Observed growth patterns indicate that these effects are not driven by age related differences in metabolic activity. Instead, our results suggest that differences in food supply or toxicological effects may be responsible for the observed relationships between relative body size and concentrations of Cu, Zn, and Se in muscle tissues. The use of otolith aging and growth measurement techniques represents a novel method for assessing the relationships between trace metal accumulation and the relative body size of fish in a field environment. (C) 2012 Elsevier B.V. All rights reserved.
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