| circumpolar pattern of mercury and cadmium in ringed seals. | mercury (hg) and cadmium (cd) concentrations in ringed seal liver and kidney were compared from 11 locations across the arctic, from alaska, canada, greenland, svalbard to the white sea. adult and sub adult seals were evaluated separately to account for age accumulations of hg and cd. only recently (1995-2001) collected samples were included to minimize influence of changes over time. the hg and cd concentrations in ringed seal liver and kidney differed significantly among the studied locations. ... | 2005 | 16005942 |
| 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. | 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 an ... | 2013 | 19329238 |
| polybrominated diphenyl ethers and their hydroxylated analogues in ringed seals (phoca hispida) from svalbard and the baltic sea. | the present study investigated the concentrations and patterns of pbdes and hydroxylated (oh) pbde analogues in two ringed seal populations: less contaminated svalbard and more contaminated baltic sea. mean concentration of hepatic sigma-pbde, which was dominated by bde47, was six times higher in the ringed seals from the baltic sea compared to the seals from svalbard. bde47/sigma-pbde was higher in the seals from svalbard compared to that for baltic seals, while the trend was opposite for bde15 ... | 2009 | 19544845 |
| an arctic predator-prey system in flux: climate change impacts on coastal space use by polar bears and ringed seals. | climate change is impacting different species at different rates, leading to alterations in biological interactions with ramifications for wider ecosystem functioning. understanding these alterations can help improve predictive capacity and inform management efforts designed to mitigate against negative impacts. we investigated how the movement and space use patterns of polar bears (ursus maritimus) in coastal areas in svalbard, norway, have been altered by a sudden decline in sea ice that occur ... | 2017 | 28415134 |
| accumulation and lactational transfer of pcbs and pesticides in harbor seals (phoca vitulina) from svalbard, norway. | the harbor seal population on svalbard, the northernmost breeding site for this species, appears to have a truncated age distribution with older animals being largely absent. pcbs and pesticides were measured in harbor seal males, females, milk and pups from svalbard to explore whether contaminant exposure or accumulation is a possible cause of premature death for these animals. the levels and patterns of these contaminants were assessed. in addition, transfer of these compounds from females to ... | 2004 | 14967507 |
| organotins in marine mammals and seabirds from norwegian territory. | an increasing number of studies indicate that marine mammals and some seabirds are exposed to organotins. however, results from northern and arctic areas are few. here results from analysis of tributyltin (tbt), dibutyltin (dbt), monobutyltin (mbt), triphenyltin (tpht), diphenyltin (dpht) and monophenyltin (mpht) in harbour porpoise (phocoena phocoena), common seal (phoca vitulina), ringed seal (phoca hispida) and glaucous gull (larus hyperboreus) from norwegian territory are presented. relative ... | 2004 | 14760453 |
| current levels of ddt, pcb and trace elements in the baltic ringed seals (phoca hispida baltica) and grey seals (halichoerus grypus). | residue levels of polychlorinated biphenyls (pcbs) and 1,1,1-trichloro-2,2-bis[p-chlorophenyl]ethane (ddt) were determined from liver samples of ringed seals (phoca lispida) from the baltic sea and svalbard, and of grey seals (halichoerus grypus) from the baltic sea and sable island in canada. both baltic seal populations showed clearly higher average sum pcb (spcb) and sum ddt (sddt) levels than the reference seal populations. among the baltic seals, spcb levels were twice as high as sddt level ... | 2002 | 12166673 |
| biomagnification of polybrominated diphenyl ether and hexabromocyclododecane flame retardants in the polar bear food chain in svalbard, norway. | concentrations of brominated flame retardants (bfrs), including polybrominated diphenylethers (pbdes) and hexabromocyclododecane (hbcd), were investigated in an arctic marine food chain consisting of four invertebrate species: polar cod (boreogadus saida), ringed seals (pusa hispida), and polar bears (ursus maritimus). the most abundant bfr, brominated diphenyl ether (bde)-47, was found in detectable concentrations even in zooplankton, the lowest trophic level examined in this study. most of the ... | 2006 | 16986806 |