H Wolkers

Summary

Affiliation: Norwegian Polar Institute
Country: Norway

Publications

  1. ncbi request reprint Accumulation and transfer of contaminants in killer whales (Orcinus orca) from Norway: indications for contaminant metabolism
    Hans Wolkers
    Norwegian Polar Institute, N 9296 Tromsø, Norway
    Environ Toxicol Chem 26:1582-90. 2007
  2. ncbi request reprint Modeling biomagnification and metabolism of contaminants in harp seals of the Barents Sea
    Alison J Fraser
    Canadian Environmental Modelling Centre, Trent University, Peterborough, Ontario
    Environ Toxicol Chem 21:55-61. 2002
  3. doi request reprint Organochlorine-induced histopathology in kidney and liver tissue from Arctic fox (Vulpes lagopus)
    Christian Sonne
    Section for Contaminants, Effects and Marine Mammals, Department of Arctic Environment, National Environmental Research Institute, University of Aarhus, Frederiksborgvej 399, PO Box 358, DK 4000 Roskilde, Denmark
    Chemosphere 71:1214-24. 2008
  4. doi request reprint Tissue-specific contaminant accumulation and associated effects on hepatic serum analytes and cytochrome P450 enzyme activities in hooded seals (Cystophora cristata) from the Gulf of St. Lawrence
    Hans Wolkers
    Norwegian Polar Institute, Polar Environmental Centre, Hjalmar Johansensgt 14, 9296 Tromsø, Norway
    Arch Environ Contam Toxicol 56:360-70. 2009
  5. ncbi request reprint Accumulation, metabolism, and food-chain transfer of chlorinated and brominated contaminants in subadult white whales (Delphinapterus leucas) and narwhals (Monodon monoceros) from Svalbard, Norway
    H Wolkers
    Norwegian Polar Institute, Tromsø, N 9296, Norway
    Arch Environ Contam Toxicol 50:69-78. 2006
  6. ncbi request reprint Congener-specific accumulation and patterns of chlorinated and brominated contaminants in adult male walruses from Svalbard, Norway: indications for individual-specific prey selection
    Hans Wolkers
    Norwegian Polar Institute, N 9296 Tromsø, Norway
    Sci Total Environ 370:70-9. 2006
  7. ncbi request reprint Congener-specific accumulation and food chain transfer of polybrominated diphenyl ethers in two arctic food chains
    Hans Wolkers
    Norwegian Polar Institute, N 9296 Tromsø, Norway
    Environ Sci Technol 38:1667-74. 2004
  8. ncbi request reprint Accumulation and lactational transfer of PCBs and pesticides in harbor seals (Phoca vitulina) from Svalbard, Norway
    Hans Wolkers
    Norwegian Polar Institute, N 9296 Tromso, Norway
    Sci Total Environ 319:137-46. 2004
  9. doi request reprint Biomarker responses and decreasing contaminant levels in ringed seals (Pusa hispida) from Svalbard, Norway
    Hans Wolkers
    Norwegian Polar Institute, Tromsø, Norway
    J Toxicol Environ Health A 71:1009-18. 2008
  10. ncbi request reprint Transfer of polychlorinated biphenyls and chlorinated pesticides from mother to pup in relation to cytochrome P450 enzyme activities in harp seals (Phoca groenlandica) from the gulf of St. Lawrence, Canada
    Hans Wolkers
    Akvaplan niva, Tromsø, Norway
    Environ Toxicol Chem 21:94-101. 2002

Detail Information

Publications16

  1. ncbi request reprint Accumulation and transfer of contaminants in killer whales (Orcinus orca) from Norway: indications for contaminant metabolism
    Hans Wolkers
    Norwegian Polar Institute, N 9296 Tromsø, Norway
    Environ Toxicol Chem 26:1582-90. 2007
    ..Polychlorinated biphenyls, chlordanes, and dichlorodiphenyldichloro-ethylene (DDE) accumulate to some degree in killer whales, although toxaphenes and PBDEs might be partly broken down...
  2. ncbi request reprint Modeling biomagnification and metabolism of contaminants in harp seals of the Barents Sea
    Alison J Fraser
    Canadian Environmental Modelling Centre, Trent University, Peterborough, Ontario
    Environ Toxicol Chem 21:55-61. 2002
    ....
  3. doi request reprint Organochlorine-induced histopathology in kidney and liver tissue from Arctic fox (Vulpes lagopus)
    Christian Sonne
    Section for Contaminants, Effects and Marine Mammals, Department of Arctic Environment, National Environmental Research Institute, University of Aarhus, Frederiksborgvej 399, PO Box 358, DK 4000 Roskilde, Denmark
    Chemosphere 71:1214-24. 2008
    ..Whether such lesions may have an impact on age and health of the animals remains uncertain...
  4. doi request reprint Tissue-specific contaminant accumulation and associated effects on hepatic serum analytes and cytochrome P450 enzyme activities in hooded seals (Cystophora cristata) from the Gulf of St. Lawrence
    Hans Wolkers
    Norwegian Polar Institute, Polar Environmental Centre, Hjalmar Johansensgt 14, 9296 Tromsø, Norway
    Arch Environ Contam Toxicol 56:360-70. 2009
    ..Therefore, liver CYP isoenzymes may serve as a sensitive biomarker for long-term exposure to polyhalogenated hydrocarbons...
  5. ncbi request reprint Accumulation, metabolism, and food-chain transfer of chlorinated and brominated contaminants in subadult white whales (Delphinapterus leucas) and narwhals (Monodon monoceros) from Svalbard, Norway
    H Wolkers
    Norwegian Polar Institute, Tromsø, N 9296, Norway
    Arch Environ Contam Toxicol 50:69-78. 2006
    ..The high levels and broad pattern of accumulating pollutants make white whales and narwhals excellent indicators for a wide range of contaminants in the Arctic...
  6. ncbi request reprint Congener-specific accumulation and patterns of chlorinated and brominated contaminants in adult male walruses from Svalbard, Norway: indications for individual-specific prey selection
    Hans Wolkers
    Norwegian Polar Institute, N 9296 Tromsø, Norway
    Sci Total Environ 370:70-9. 2006
    ..This suggestion was reinforced by the fatty acid profiles of the inner blubber layer of walruses with low versus high contaminant levels, which suggested different diets for the two groups...
  7. ncbi request reprint Congener-specific accumulation and food chain transfer of polybrominated diphenyl ethers in two arctic food chains
    Hans Wolkers
    Norwegian Polar Institute, N 9296 Tromsø, Norway
    Environ Sci Technol 38:1667-74. 2004
    ..Polar bears are seemingly capable of metabolizing virtually all PBDEs and are therefore unsuitable as indicators for PBDE contamination in the environment...
  8. ncbi request reprint Accumulation and lactational transfer of PCBs and pesticides in harbor seals (Phoca vitulina) from Svalbard, Norway
    Hans Wolkers
    Norwegian Polar Institute, N 9296 Tromso, Norway
    Sci Total Environ 319:137-46. 2004
    ..The similar contaminant pattern in milk and pups suggested that they are probably unable to metabolize contaminants and consequently, accumulate all ingested chemicals...
  9. doi request reprint Biomarker responses and decreasing contaminant levels in ringed seals (Pusa hispida) from Svalbard, Norway
    Hans Wolkers
    Norwegian Polar Institute, Tromsø, Norway
    J Toxicol Environ Health A 71:1009-18. 2008
    ..9%)between EROD activity and percent blubber indicates that CYP might respond to increased bioavailability of the contaminant mixtures when they are mobilized from blubber during periods of reduced food intake...
  10. ncbi request reprint Transfer of polychlorinated biphenyls and chlorinated pesticides from mother to pup in relation to cytochrome P450 enzyme activities in harp seals (Phoca groenlandica) from the gulf of St. Lawrence, Canada
    Hans Wolkers
    Akvaplan niva, Tromsø, Norway
    Environ Toxicol Chem 21:94-101. 2002
    ..The CYP450 enzyme activities were considered unsuitable indicators for contaminant mobilization and transfer in harp seals...
  11. ncbi request reprint Tissue-specific accumulation and lactational transfer of polychlorinated biphenyls, chlorinated pesticides, and brominated flame retardants in hooded seals (Cistophora cristata) from the Gulf of St. Lawrence: applications for monitoring
    Hans Wolkers
    Norwegian Polar Institute, Polar Environmental Centre, N 9296 Tromsø, Norway
    Environ Pollut 142:476-86. 2006
    ..This might be caused by their low blubber, and thus contaminant, loss during lactation compared to other species...
  12. ncbi request reprint Bioaccumulation of radiocaesium in Arctic seals
    Jolynn Carroll
    Akvaplan niva AS, Polar Environmental Centre, 9296 Tromsø, Norway
    Mar Pollut Bull 44:1366-71. 2002
    ..The application of this work to Arctic monitoring and assessment programs is discussed...
  13. ncbi request reprint Contaminants in Svalbard polar bear samples archived since 1967 and possible population level effects
    Andrew E Derocher
    Norwegian Polar Institute, N 9296 Tromso, Norway
    Sci Total Environ 301:163-74. 2003
    ....
  14. ncbi request reprint Bioaccumulation of PCBs in Arctic seabirds: influence of dietary exposure and congener biotransformation
    Katrine Borgå
    Norwegian Polar Institute, N 9296 Tromsø, Norway
    Environ Pollut 134:397-409. 2005
    ....
  15. ncbi request reprint Blood is a poor substrate for monitoring pollution burdens in phocid seals
    Christian Lydersen
    Norwegian Polar Institute, Tromsø
    Sci Total Environ 292:193-203. 2002
    ....
  16. ncbi request reprint Organotins in marine mammals and seabirds from Norwegian territory
    John Arthur Berge
    Norwegian Institute for Water Research, PO Box 173, Kjelsås N 0411 Oslo, Norway
    J Environ Monit 6:108-12. 2004
    ..The limited data available indicate low to moderate exposure to organotins in northern areas (Spitsbergen and Bear Island). Marine mammals are however more exposed further south along the Norwegian Coast...