C Lydersen

Summary

Affiliation: Norwegian Polar Institute
Country: Norway

Publications

  1. ncbi request reprint Precocial diving and patent foramen ovale in bearded seal (Erignathus barbatus) pups
    C Lydersen
    Norwegian Polar Institute, 9296 Tromsø, Norway
    J Comp Physiol B 172:713-7. 2002
  2. 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
  3. ncbi request reprint Energy intake and utilisation by nursing bearded seal (Erignathus barbatus) pups from Svalbard, Norway
    C Lydersen
    Norwegian Polar Institute, , Norway
    J Comp Physiol B 166:405-11. 1996
  4. ncbi request reprint Energetics during nursing and early postweaning fasting in hooded seal (Cystophora cristata) pups from the Gulf of St Lawrence, Canada
    C Lydersen
    Norwegian Polar Institute, , Norway
    J Comp Physiol B 167:81-8. 1997
  5. ncbi request reprint Diving development in nursing harbour seal pups
    C Jørgensen
    Norwegian Polar Institute, Polar Environmental Center, N 9296 Tromsø, Norway
    J Exp Biol 204:3993-4004. 2001
  6. pmc Effects of hydrographic variability on the spatial, seasonal and diel diving patterns of southern elephant seals in the eastern Weddell Sea
    Martin Biuw
    Norwegian Polar Institute, Polar Environmental Centre, Tromsø, Norway
    PLoS ONE 5:e13816. 2010
  7. 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
  8. 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
  9. 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
  10. ncbi request reprint Ringed seal post-moulting movement tactics and habitat selection
    Carla Freitas
    Norwegian Polar Institute, Polar Environmental Centre, 9296 Tromsø, Norway
    Oecologia 155:193-204. 2008

Detail Information

Publications34

  1. ncbi request reprint Precocial diving and patent foramen ovale in bearded seal (Erignathus barbatus) pups
    C Lydersen
    Norwegian Polar Institute, 9296 Tromsø, Norway
    J Comp Physiol B 172:713-7. 2002
    ..Special adaptations in the seals, such as collapsible lungs and diving with minimal lung air volume, probably prevent this from happening...
  2. 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
    ....
  3. ncbi request reprint Energy intake and utilisation by nursing bearded seal (Erignathus barbatus) pups from Svalbard, Norway
    C Lydersen
    Norwegian Polar Institute, , Norway
    J Comp Physiol B 166:405-11. 1996
    ..Bearded seal mothers forage during lactation and may also be involved in teaching their pups to feed independently. All these data suggest that the lactation strategy of bearded seals differs from the phocid norm...
  4. ncbi request reprint Energetics during nursing and early postweaning fasting in hooded seal (Cystophora cristata) pups from the Gulf of St Lawrence, Canada
    C Lydersen
    Norwegian Polar Institute, , Norway
    J Comp Physiol B 167:81-8. 1997
    ..5% water, 58.6% fat and 6.2% protein. The pups drank an average of 10.4 +/- 1.8 kg of milk daily, which represents an energy intake of 248.9 +/- 39.1 MJ.day-1. The pups were able to store 73.2 +/- 7.7% of this energy as body tissue...
  5. ncbi request reprint Diving development in nursing harbour seal pups
    C Jørgensen
    Norwegian Polar Institute, Polar Environmental Center, N 9296 Tromsø, Norway
    J Exp Biol 204:3993-4004. 2001
    ..It appears that behavioural modifications (experience and learning) may be the primary rate-limiting factors for ontogeny of diving skills in neonates of this species...
  6. pmc Effects of hydrographic variability on the spatial, seasonal and diel diving patterns of southern elephant seals in the eastern Weddell Sea
    Martin Biuw
    Norwegian Polar Institute, Polar Environmental Centre, Tromsø, Norway
    PLoS ONE 5:e13816. 2010
    ....
  7. 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...
  8. 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...
  9. 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...
  10. ncbi request reprint Ringed seal post-moulting movement tactics and habitat selection
    Carla Freitas
    Norwegian Polar Institute, Polar Environmental Centre, 9296 Tromsø, Norway
    Oecologia 155:193-204. 2008
    ..This flexibility in ringed seal spatial ecology during summer and fall is expected to result in increased population viability in this high Arctic environment...
  11. 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...
  12. ncbi request reprint Climate change impacts on seals and whales in the North Atlantic Arctic and adjacent shelf seas
    Kit M Kovacs
    Biodiversity Research Group, Norwegian Polar Institute, 9696, Tromsø, Norway
    Sci Prog 91:117-50. 2008
    ..If species are fixed in traditional spatial and temporal cycles, and are unable to shift them within decadal time scales, some populations will go extinct. In somewhat longer time frames, species extinctions can also be envisaged...
  13. doi request reprint Hormone, vitamin and contaminant status during the moulting/fasting period in ringed seals (Pusa [Phoca] hispida) from Svalbard
    Heli Routti
    Norwegian Polar Institute, Polar Environmental Centre, 9296 Tromsø, Norway
    Comp Biochem Physiol A Mol Integr Physiol 155:70-6. 2010
    ..Thus, moulting status and body condition should be taken into consideration when using variables related to thyroid, calcium or vitamin A homeostasis as biomarkers for contaminant effects...
  14. 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...
  15. ncbi request reprint Radiocaesium (137Cs) in marine mammals from Svalbard, the Barents Sea and the North Greenland Sea
    Magnus Andersen
    Norwegian Polar Institute, N 9296, Tromsø, Norway
    Sci Total Environ 363:87-94. 2006
    ....
  16. ncbi request reprint Energetics of lactation in harp seals (Phoca groenlandica) from the Gulf of St. Lawrence, Canada
    C Lydersen
    Norwegian Polar Institute, , Norway
    J Comp Physiol B 166:295-304. 1996
    ....
  17. 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...
  18. ncbi request reprint Serum haptoglobin concentrations in ringed seals (Pusa hispida) from Svalbard, Norway
    Bjørn A Krafft
    Norwegian Polar Institute, N 9296 Tromsø, Norway
    J Wildl Dis 42:442-6. 2006
    ..The Hp concentrations of ringed seals measured in this study are useful baseline data for development of a diagnostic tool for future monitoring of the general health of this and other ringed seal populations...
  19. doi request reprint Helminth parasites in ringed seals (Pusa hispida) from Svalbard, Norway with special emphasis on nematodes: variation with age, sex, diet, and location of host
    Carina E Johansen
    Norwegian Polar Institute, N 9296 Tromsø, Norway
    J Parasitol 96:946-53. 2010
    ..Infection parameters appeared to be related to differences in the age of polar cod (Boreogadus saida) exploited by male, female, and juvenile seals...
  20. ncbi request reprint Serum chemistry values for free-ranging ringed seals (Pusa hispida) in Svalbard
    Morten Tryland
    Department of Food Safety and Infection Biology, Section of Arctic Veterinary Medicine, Norwegian School of Veterinary Science, Tromsø, Norway
    Vet Clin Pathol 35:405-12. 2006
    ..The ringed seal (Pusa hispida) has been selected as a key species for environmental monitoring, but information on disease and health parameters for this species is scarce...
  21. ncbi request reprint Serum chemistry of free-ranging white whales (Delphinapterus leucas) in Svalbard
    Morten Tryland
    Norwegian School of Veterinary Science, Section of Arctic Veterinary Medicine, Tromsø, Norway
    Vet Clin Pathol 35:199-203. 2006
    ..Serum chemistry information may thus be indicative of a specific disease; interpretation of such information requires knowledge of serum chemistry reference intervals from a seemingly healthy population of the species...
  22. doi request reprint Serum chemistry reference values in free-ranging north Atlantic male walruses (Odobenus rosmarus rosmarus) from the Svalbard archipelago
    Morten Tryland
    The Norwegian School of Veterinary Science, Section of Arctic Veterinary Medicine, Tromsø, Norway
    Vet Clin Pathol 38:501-6. 2009
    ..Serum chemistry analysis is a useful clinical tool for the health assessment of walruses, but only a few captive Pacific walruses have been evaluated...
  23. doi request reprint Stratification, composition, and function of marine mammal blubber: the ecology of fatty acids in marine mammals
    Ursula Strandberg
    Faculty of Biosciences, University of Joensuu, P O Box 111, FI 80101 Joensuu, Finland
    Physiol Biochem Zool 81:473-85. 2008
    ....
  24. ncbi request reprint Biomagnification of polybrominated diphenyl ether and hexabromocyclododecane flame retardants in the polar bear food chain in Svalbard, Norway
    Eugen Gravningen Sørmo
    Norwegian University of Science and Technology, Department of Biology, NO 7491 Trondheim, Norway
    Environ Toxicol Chem 25:2502-11. 2006
    ..This study demonstrates that PBDEs and HBCD have reached measurable concentrations even in the lower trophic levels (invertebrates and fish) in the Arctic and biomagnifies in the polar bear food chain...
  25. ncbi request reprint Chemical characterization of the oligosaccharides in beluga (Delphinapterus leucas) and Minke whale (Balaenoptera acutorostrata) milk
    Tadasu Urashima
    Department of Bioresource Science, Obihiro University of Agriculture and Veterinary Medicine, Inada cho, Obihiro, Hokkaido, 080 8555, Japan
    Comp Biochem Physiol B Biochem Mol Biol 132:611-24. 2002
    ..Therefore, lactose may not be a source of energy for suckling beluga whales...
  26. ncbi request reprint Polar bear hemoglobin and human Hb A0: same 2,3-diphosphoglycerate binding site but asymmetry of the binding?
    Massimo Pomponi
    Istituto di Biochimica, Universita Cattolica Sacro Cuore, Facoltà di Medicina A Gemelli Largo F Vito 1, 00168 Roma, Italia
    Hemoglobin 26:363-71. 2002
    ..Regarding this point, 31P NMR data suggest a loss of symmetry of the 2,3-DPG-binding site in the deoxyHb-2,3-DPG complex...
  27. ncbi request reprint Sounds produced by individual white whales, Delphinapterus leucas, from Svalbard during capture
    Sofie M Van Parijs
    J Acoust Soc Am 113:57-60. 2003
  28. ncbi request reprint Hemoglobin, pH and DPG/chloride shifting
    Massimo Pomponi
    Istituto di Biochimica, UCSC, Facolta di Medicina, Largo F, Vito 1, 00168 Rome, Italy
    Biochimie 86:927-32. 2004
    ..We further hypothesize that the resulting widening of the central cavity allows the Lys-82 (beta) terminus to be free and constitute an additional, chloride-binding site...
  29. doi request reprint Feeding kinematics, suction and hydraulic jetting capabilities in bearded seals (Erignathus barbatus)
    Christopher D Marshall
    Department of Marine Biology, Texas A and M University at Galveston, 5007 Avenue U, Galveston, TX 77551, USA
    J Exp Biol 211:699-708. 2008
    ..Furthermore, bearded seals support predictions that mouth size, fluid flow speed, and elusiveness of prey consumed are among a suite of traits that determine the specific nature of suction feeding among species...
  30. ncbi request reprint Chemical characterization of the oligosaccharides in milk of high Arctic harbour seal (Phoca vitulina vitulina)
    Tadasu Urashima
    Department of Bio Resource Science, Obihiro University of Agriculture and Veterinary Medicine, Inada cho, Obihiro, Hokkaido 080 8555, Japan
    Comp Biochem Physiol A Mol Integr Physiol 135:549-63. 2003
    ..The Neu5Ac residues were found to be linked to GlcNAc or penultimate Gal residues. The acidic oligosaccharides are the first to have been characterized in the milk of any species of seal...
  31. ncbi request reprint Serosurvey for Toxoplasma gondii in arctic foxes and possible sources of infection in the high Arctic of Svalbard
    Kristin Wear Prestrud
    Norwegian School of Veterinary Science NVH, Section of Arctic Veterinary Medicine, P O Box 6204, N 9292 Tromsø, Norway
    Vet Parasitol 150:6-12. 2007
    ..In addition to transmission through infected prey and carrion, the age-seroprevalence profile in the fox population suggests that their infection levels are enhanced by vertical transmission...
  32. ncbi request reprint Characterization of oligosaccharides in milk of bearded seal (Erignathus barbatus)
    Tadasu Urashima
    Department of Bio Resource Science, Obihiro University of Agriculture and Veterinary Medicine, Inada cho, Obihiro, Hokkaido 080 8555, Japan
    Comp Biochem Physiol B Biochem Mol Biol 138:1-18. 2004
    ..The milk oligosaccharides of the bearded seal were compared to those of the harbour seal, which had been studied previously...
  33. ncbi request reprint Entanglement of Antarctic fur seals at Bouvetøya, Southern Ocean
    G J Greg Hofmeyr
    Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Pretoria 0002, South Africa
    Mar Pollut Bull 52:1077-80. 2006
    ..Significantly more subadults were found entangled than expected from the postulated population age class distribution...
  34. ncbi request reprint Microstructure and innervation of the mystacial vibrissal follicle-sinus complex in bearded seals, Erignathus barbatus (Pinnipedia: Phocidae)
    Christopher D Marshall
    Department of Marine Biology, Texas A and M University at Galveston, Texas 77551, USA
    Anat Rec A Discov Mol Cell Evol Biol 288:13-25. 2006
    ....