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PAH body burden and biomarker responses in mussels (Mytilus edulis) exposed to produced water from a North Sea oil field: laboratory and field assessments |
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| Authors: | Sundt Rolf C Pampanin Daniela M Grung Merete Bar?ien? Janina Ruus Anders |
| Institution: | a IRIS - International Research Institute of Stavanger, P.O. Box 8046, N-4068 Stavanger, Norway b Norwegian Institute for Water Research, Gaustadalléen 21, NO-0349 Oslo, Norway c Institute of Ecology Nature Research Center, Akademijos 2, 08412 Vilnius, Lithuania |
| Abstract: | In order to study the impact of produced water (PW) from a North Sea oil field on blue mussels (Mytilus edulis), chemical and biological markers were selected. A laboratory exposure (0.125%, 0.25% and 0.5% of PW) and a field study (6 stations 0.2-2 km from a PW discharge point) were conducted. In the laboratory study, PAH bioaccumulation increased in mussel soft tissue even at the lowest exposure dose. Micronuclei frequency demonstrated a dose-response pattern, whereas lysosomal membrane stability showed tendency towards a dose-response pattern. The same markers were assessed in the field study, biomarker analyses were consistent with the contamination level, as evaluated by mussel polycyclic aromatic hydrocarbons body burden. Overall, obtained results confirmed the value of an ecotoxicological approach for a scientifically sound characterisation of biological effects induced by offshore oilfield operational discharges. |
| Keywords: | Produced water Mussel Lysosomal membrane stability Micronuclei Bioaccumulation Monitoring |
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