Publications

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chromosome aberrations and dna strand breaks in glaucous gull (larus hyperboreus) chicks fed environmentally contaminated gull eggs.in this present laboratory study, our results suggest that a complex mixture of pollutants found in the marine environment exerts genotoxic effects on glaucous gull (larus hyperboreus) chicks fed environmentally contaminated gull eggs. chromosome aberrations, quantified by cytogenetic analysis of blood cells, and dna strand breaks, quantified by agarose gel electrophoresis and image data analysis, were determined in glaucous gull chicks fed environmentally contaminated gull eggs (exposed group) ...200616291568
the occurrence of organochlorines in marine avian top predators along a latitudinal gradient.the aim of this study was to determine the role of cold condensation and fractionation on the occurrence of organochlorine contaminants (ocs) in avian marine top predators along a latitudinal gradient. we measured 24 polychlorinated biphenyl (pcb) congeners and six pesticide ocs in blood of great black-backed gulls (larus marinus) from the norwegian coast (58 degrees n-70 degrees n) and glaucous gulls (larus hyperboreus) from bjornoya in the norwegian arctic (74 degrees n). glaucous gulls had up ...200616955919
persistent organic pollution in a high-arctic top predator: sex-dependent thresholds in adult survival.in long-lived species, any negative effect of pollution on adult survival may pose serious hazards to breeding populations. in this study, we measured concentrations of various organochlorines (ocs) (polychlorinated biphenyl and oc pesticides) in the blood of a large number of adult glaucous gulls (larus hyperboreus) breeding on bjørnøya (bear island) in the norwegian arctic, and modelled their local survival using capture-recapture analysis. survival was negatively associated with concentration ...201323966640
organohalogen contaminants and reproductive hormones in incubating glaucous gulls (larus hyperboreus) from the norwegian arctic.organohalogen contaminants detected globally in avian wildlife, including populations from the arctic, have been related to various reproductive hormone potencies, and altered hormonal balance and functions. besides legacy organochlorine (oc) substances, that is, polychlorinated biphenyls (pcbs) and oc pesticides and by-products, endocrine-disruptive properties have been defined for chemicals of new and emerging environmental concern, such as polybrominated diphenyl ethers (pbdes) and metabolica ...200617089723
organochlorines in antarctic and arctic avian top predators: a comparison between the south polar skua and two species of northern hemisphere gulls.different organochlorine compounds (ocs) were measured in the blood of breeding south polar skuas (catharacta maccormicki) at svarthamaren, dronning maud land (antarctica) and compared to those in two species of northern hemisphere gulls: the arctic glaucous gull (larus hyperboreus) and the subarctic great black-backed gull (larus marinus). the skuas had 8% and 29% of the sigmaoc levels (45 ng/g, wet weight) of glaucous gulls (591 ng/g) and great black-backed gulls (158 ng/g), respectively. poly ...200616683630
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 ...200414760453
maternal transfer of organohalogen contaminants and metabolites to eggs of arctic-breeding glaucous gulls.eggs of seabirds have routinely been used as indicators of environmental pollution in the arctic. however, the variability in organohalogen concentration and composition associated with the laying sequence, have not been defined. we examined a suite of pcbs, organochlorine (oc) pesticides and by-products, polybrominated diphenyl ethers (pbdes), polybrominated biphenyls (pbbs) and methylsulfonyl- (meso2) pcbs in complete 3-egg clutches of glaucous gulls (larus hyperboreus), and plasma samples of ...200616563578
relationships between ecological variables and four organochlorine pollutants in an artic glaucous gull (larus hyperboreus) population.the arctic has become a sink for organochlorine contaminants (ocs) from lower latitudes, and relatively high levels have been found in different biota. recent studies of the glaucous gull, larus hyperboreus, a top predator in the arctic food web, have documented that high blood residues of various ocs are related to lower reproductive performance and reduced adult survival. here we provide additional evidence that ocs are having ecological effects in the glaucous gull population at bear island i ...200515809119
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