title: Seasonal and intertidal impact on DNA adduct levels in gills of blue mussels (Mytilus edulis L.).
abstract: The aim of this study was to elucidate possible seasonal variation in DNA adduct levels in blue mussels (Mytilus edulis), and to investigate the impact of intertidal exposure on the DNA adduct levels, i.e. to explore if DNA adduct levels in mussels in the intertidal zone differ from those in the subtidal zone. Blue mussels were deployed separately in the intertidal and subtidal zone at a contaminated and a reference site in Iceland, and sampled regularly during one year. Gill DNA adduct levels were found to be higher in mussels in the intertidal zone compared to the subtidal zone at the contaminated site, the difference being largest in winter. Total PAH tissue levels were also higher in mussels in the intertidal zone. Seasonal variation was observed in both DNA adduct and PAH tissue levels in mussels at the contaminated site, with lower levels from the time of transplantation in summer to autumn, maximum levels in winter, which decreased to lower levels again in spring and summer the following year. DNA adducts and PAH levels were low or below the detection limits in mussels at the reference site at all times, both in the intertidal and subtidal zone.
authors.affiliation: Institute of Applied Environmental Research, Laboratory for Aquatic Ecotoxicology, Stockholm University, 10691 Stockholm, Sweden. dibyendu.sarkar@utsa.edu
authors.forename: Halldóra
authors.initials: H
authors.lastname: Skarphédinsdóttir
authors.forename: Gunilla
authors.initials: G
authors.lastname: Ericson
authors.forename: Halldór P
authors.initials: HP
authors.lastname: Halldórsson
authors.forename: Jörundur
authors.initials: J
authors.lastname: Svavarsson
mesh_terms: D000818:Animals; D049872:Bivalvia / Q000378:metabolism*; D018736:DNA Adducts / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods; D005880:Gills / Q000378:metabolism*; D007055:Iceland; D011084:Polycyclic Aromatic Hydrocarbons / Q000633:toxicity*; D012621:Seasons; D012623:Seawater; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D018736:DNA Adducts; D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical