Journal
MARINE POLLUTION BULLETIN
Volume 58, Issue 12, Pages 1796-1807Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2009.08.007
Keywords
Dispersed oil; Mytilus edulis; Chlamys islandica; North Sea; Barents Sea; Biomonitoring; Biomarkers
Funding
- ENI Norge AS
- Total EP Norge AS
- Research Council of Norway
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Mytilus edulis and Chlamys islandica were exposed to nominal dispersed crude oil concentrations in the range 0.015-0.25 mg/l for one month. Five biomarkers (enzymatic and cellular responses) were analysed together with bioaccumulation of PAHs at the end of exposure. In both species, PAH tissue residues reflected the exposure concentration measured in the water and lipophylicity determined the bioaccumulation levels. Oil caused biomarker responses in both species but more significant alterations in exposed C. islandica were observed. The relationships between exposure levels and enzymatic responses were apparently complex. The integrated biomarker response related against the exposure levels was U-shaped in both species and no correlation with total PAH body burden was found. For the monitoring of chronic offshore discharges, close- and time-related events should be evaluated in the selection of biomarkers to apply. From this study, cellular damages appear more fitted than enzymatic responses, transient and more complex to interpret. (C) 2009 Elsevier Ltd. All rights reserved.
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