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Concentrations, patterns and metabolites of organochlorine pesticides in relation to xenobiotic phase I and II enzyme activities in ringed seals (Phoca hispida) from Svalbard and the Baltic Sea
2009
Routti, Heli | Bavel, Bert van | Letcher, Robert J. | Arukwe, Augustine | Chu, Shaogang | Gabrielsen, Geir W.
The present study investigates the concentrations and patterns of organochlorine pesticides (OCPs) and their metabolites in liver and plasma of two ringed seal populations (Phoca hispida): lower contaminated Svalbard population and more contaminated Baltic Sea population. Among OCPs, p,p'-DDE and sum-chlordanes were the highest in concentration. With increasing hepatic contaminant concentrations and activities of xenobiotic-metabolizing enzymes, the concentrations of 3-methylsulfonyl-p,p'-DDE and the concentration ratios of pentachlorophenol/hexachlorobenzene increased, and the toxaphene pattern shifted more towards persistent Parlar-26 and -50 and less towards more biodegradable Parlar-44. Relative concentrations of the chlordane metabolites, oxychlordane and -heptachlorepoxide, to sum-chlordanes were higher in the seals from Svalbard compared to the seals from the Baltic, while the trend was opposite for cis- and trans-nonachlor. The observed differences in the OCP patterns in the seals from the two populations are probably related to the catalytic activity of xenobiotic-metabolizing enzymes, and also to differences in dietary exposure. Contrasting patterns of organochlorine pesticides in two ringed seal populations.
Afficher plus [+] Moins [-]Can seal eating explain elevated levels of PCBs and organochlorine pesticides in walrus blubber from Eastern Hudson Bay (Canada)?
1995
Muir, D.C.G. | Segstro, M.D. | Hobson, K.A. | Ford, C.A. | Stewart, R.E.A. | Olpinski, S. (Department of Fisheries and Oceans, Central and Arctic Region, Winnipeg, Manitoba R3T 2N6 (Canada))
Mercury pollution and the Saimaa ringed seal (Phoca hispida saimensis)
1998
Hyvarinen, H. | Sipila, T. | Kunnasranta, M. | Koskela, J.T. (Department of Biology, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu (Finland))
Enantioselective analysis of organochlorine pesticides in herring and seal from the Swedish marine environment
1998
Wiberg, K. | Oehme, M. | Haglund, P. | Karlsson, H. | Olsson, M. | Rappe, C. (Institute of Environmental Chemistry, Umea University, S-901 87 Umea (Sweden))
