Search Results - "Helgason, Lisa B."

Contrasting retinoid and thyroid hormone status in differentially-contaminated northern fulmar colonies from the Canadian Arctic, Svalbard and the Faroe Islands by Verreault, Jonathan, Helgason, Lisa B., Gabrielsen, Geir W., Dam, Maria, Braune, Birgit M.

“…The northern fulmar (Fulmarus glacialis) has previously been shown to accumulate a wide range, and occasionally high concentrations of organochlorines (OCs)…”
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Seasonal emaciation causes tissue redistribution and an increased potential for toxicity of lipophilic pollutants in farmed arctic fox (Vulpes lagopus) by Helgason, Lisa B., Wolkers, Hans, Fuglei, Eva, Ahlstrøm, Øystein, Muir, Derek, Jørgensen, Even H.

“…Many Arctic animals carry high body burdens of organochlorine contaminants (OCs) as a result of long‐range transport of persistent pollutants. It has been…”
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Levels and temporal trends (1983–2003) of persistent organic pollutants (POPs) and mercury (Hg) in seabird eggs from Northern Norway by Helgason, Lisa B., Barrett, Rob, Lie, Elisabeth, Polder, Anuschka, Skaare, Janneche U., Gabrielsen, Geir W.

“…The main objective of this study was to investigate possible temporal trends of persistent organic pollutants (POPs) and mercury in eggs of herring gulls (…”
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Persistent organic pollutants and mercury in dead and dying glaucous gulls ( Larus hyperboreus) at Bjørnøya (Svalbard) by Sagerup, Kjetil, Helgason, Lisa B., Polder, Anuschka, Strøm, Hallvard, Josefsen, Terje D., Skåre, Janneche U., Gabrielsen, Geir W.

“…Dead and dying glaucous gulls ( Larus hyperboreus) were collected on Bjørnøya in the Barents Sea in 2003, 2004 and 2005. Autopsies of the seabirds only…”
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Levels and temporal trends (1983-2003) of polybrominated diphenyl ethers and hexabromocyclododecanes in seabird eggs from North Norway by Helgason, Lisa B, Polder, Anuschka, Føreid, Siri, Bæk, Kine, Lie, Elisabeth, Gabrielsen, Geir W, Barrett, Robert T, Skaare, Janneche U

“…The present study assessed temporal trends (1983-2003) of polybrominated diphenyl ethers (PBDEs) and hexabro-mocyclododecanes (HBCDs) in eggs of herring gulls…”
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Hepatic antioxidant responses related to levels of PCBs and metals in chicks of three Arctic seabird species by Hegseth, Marit Nøst, Camus, Lionel, Helgason, Lisa B., Bocchetti, Raffaella, Gabrielsen, Geir Wing, Regoli, Francesco

“…The efficiency of antioxidant defenses and relationship with body burden of metal and organic contaminants has not been previously investigated in arctic…”
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Relationship between persistent halogenated organic contaminants and TCDD-toxic equivalents on EROD activity and retinoid and thyroid hormone status in northern fulmars by Helgason, Lisa B., Verreault, Jonathan, Braune, Birgit M., Borgå, Katrine, Primicerio, Raul, Jenssen, Bjørn M., Gabrielsen, Geir W.

“…We investigated whether the hepatic cytochrome P450 1A activity (measured as 7-ethoxyresorufin- O-deethylase (EROD)) and plasma thyroid hormone and liver…”
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Biotransformation of PCBs in Arctic seabirds: Characterization of phase I and II pathways at transcriptional, translational and activity levels by Helgason, Lisa B., Arukwe, Augustine, Gabrielsen, Geir W., Harju, Mikael, Hegseth, Marit N., Heimstad, Eldbjørg S., Jørgensen, Even H., Mortensen, Anne S., Wolkers, Johannes

“…Arctic seabirds are exposed to a wide range of halogenated organic contaminants (HOCs). Exposure occurs mainly through food intake, and many pollutants…”
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Biomarker Responses and Decreasing Contaminant Levels in Ringed Seals (Pusa hispida) from Svalbard, Norway by Wolkers, Hans, Krafft, Bjørn A., van Bavel, Bert, Helgason, Lisa B., Lydersen, Christian, Kovacs, Kit M.

“…Blubber was analyzed for a wide range of contaminants from five subadult and eight adult male ringed seals sampled in 2004, namely, for polychlorinated…”
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Seasonal emaciation causes tissue redistribution and an increased potential for toxicity of lipophilic pollutants in farmed arctic fox (Vulpes lagopus) by Helgason, Lisa B, Wolkers, Hans, Fuglei, Eva, Ahlstrøm, Øystein, Muir, Derek, Jørgensen, Even H

“…Many Arctic animals carry high body burdens of organochlorine contaminants (OCs) as a result of long-range transport of persistent pollutants. It has been…”
Get full text