(Table 1) Concentrations of the main organochlorine pesticides in liver and plasma samples of ringed seals (Phoca hispida)

• Main Authors: Routti, Heli, van Bavel, Bert, Letcher, Robert J, Arukwe, Augustine, Chu, Shaogang, Gabrielsen, Geir W
• Format: Dataset
• Language: English
• Published: PANGAEA 2009
• Subjects: 3-methylsulfonyl p,p-dichlorodiphenyl dichloroethylene; 4-hydroxy-heptachlorostyrene; Area/locality; Baltic Sea; BalticSea_Bothnia; Biological sample; BIOS; Chlordane; Event label; Hexachlorobenzene; International Polar Year (2007-2008); IPY; Lipids; MULT; Multiple investigations; Organochlorine pesticides; para,para-Dichlorodiphenyldichloroethylene; Sample amount; subset; Sample type; Sampling date; Species; common name; Svalbard; Toxaphene; total; International Polar Year; Phoca hispida; ringed seal
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.819455; https://doi.org/10.1594/PANGAEA.819455

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.