期刊
MARINE POLLUTION BULLETIN
卷 60, 期 8, 页码 1336-1345出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2010.03.004
关键词
Arctic pollutants; Biomarker baseline; Metabolism; Oxidative stress; Polar cod
资金
- ConocoPhillips, Norge A.S
- ConocoPhillips
- Research Council of Norway [MariClim 165112/S30]
Seasonality of biomarker baseline levels were studied in polar cod (Boreogadus saida), caught in Kongs-fjorden, Svalbard, in April, July, September and December, 2006-2007. Physiological parameters (condition factor, gonado- and hepato-somatic indexes, energy reserves, potential metabolic activity and antifreeze activity) in polar cod were used to interpret the seasonality of potential biomarkers. The highest levels of ethoxyresorufin-O-deethylase (EROD) activity occurred concomitantly with the highest potential metabolic activity in July due to e.g. intense feeding. During pre-spawning, EROD showed significant inhibition and gender differences. Hence, its potential use in environmental monitoring should imply gender differentiation at least during this period. Glutathione S-transferase and catalase activities were stable from April to September, but changed in December suggesting a link to low biological activity. Knowledge of the biomarker baseline levels and their seasonal trends in polar cod is essential for a trustworthy interpretation of forthcoming toxicity data and environmental monitoring in the Arctic. (C) 2010 Elsevier Ltd. All rights reserved.
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