A5101794384- Marine animal studies overview
- Arctic and Antarctic ice dynamics
- Cryospheric studies and observations
- Toxic Organic Pollutants Impact
- Mercury impact and mitigation studies
- Avian ecology and behavior
- Wildlife Ecology and Conservation
- Isotope Analysis in Ecology
- Arctic and Russian Policy Studies
- Marine and fisheries research
- Radioactive contamination and transfer
- Radioactivity and Radon Measurements
- Atmospheric chemistry and aerosols
- Indigenous Studies and Ecology
- Geological Studies and Exploration
- Aerospace Engineering and Energy Systems
- Animal Vocal Communication and Behavior
- Per- and polyfluoroalkyl substances research
- Marine and environmental studies
- Biochemical effects in animals
- Atmospheric and Environmental Gas Dynamics
- Marine Ecology and Invasive Species
- Fatty Acid Research and Health
- Probiotics and Fermented Foods
- Physiological and biochemical adaptations
Norwegian Polar Institute
2015-2025
University of Guam
2025
Norwegian University of Life Sciences
2009
University of Windsor
2005
UiT The Arctic University of Norway
1999
The polar bear ( Ursus maritimus ) is the only Arctic land mammal that dives into water to hunt. Despite thermal insulation provided by blubber and fur layers low temperatures, their typically observed be free of ice. This study investigates anti-icing properties fur. Here, we show exhibits ice adhesion strengths comparable fluorocarbon-coated fibers, with a consequence sebum (hair grease). Lipid analyses reveal presence cholesterol, diacylglycerols, anteisomethyl-branched fatty acids,...
The brominated flame retardants have been subject of a particular environmental focus in the Arctic. present study investigated congener patterns and levels total hexabromocyclododecane (HBCD), polybrominated biphenyls, diphenyl ethers (PBDEs), as well methoxylated (MeO) hydroxylated (OH) PBDEs plasma samples glaucous gulls (Larus hyperboreus) polar bears (Ursus maritimus) from Norwegian analyses revealed presence HBCD (0.07−1.24 ng/g wet wt) biphenyl 101 (<0.13−0.72 gull whereas these...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 441:273-279 (2011) - DOI: https://doi.org/10.3354/meps09406 Sea ice and polar bear den ecology at Hopen Island, Svalbard A. E. Derocher1,*, M. Andersen2, Ø. Wiig3, J. Aars2, Hansen2, Biuw2 1Department of Biological Sciences, University Alberta, Edmonton, Alberta T6G 2E9, Canada 2Norwegian Polar Institute,...
This study used 13 years of cetacean sighting data (2002–2014) from waters around the Svalbard Archipelago to determine key habitats for year-round resident species as well seasonally species, and explore spatial overlap between these groups via a combination kernel density estimation Maxent modelling. The set consists observations made by research vessels conducting various marine studies, coast guard ships marine-cruise tourist operators. Data are reported seasonal period in which there is...
Polar bears have experienced a rapid loss of sea-ice habitat in the Barents Sea. Monitoring this subpopulation focuses on effects polar bear demography. In August 2015, we conducted survey Norwegian Arctic to estimate numbers and reveal population substructure. DNA profiles from biopsy samples ear tags identified photographs revealed that about half Svalbard, compared only 4.5% pack ice north archipelago, were recognized recaptures. The recaptured had originally been marked mostly spring....
Sexual dimorphism in body mass, length, head width, and foreleg guard hair length of polar bears ( Ursus maritimus ) was examined from live-captured Svalbard, Norway. Limited evidence sexual apparent cubs shortly after den emergence but marked the 1st year life. adults resulted both a higher growth rate prolonged period males. In mature animals, greatest followed by length. Foreleg age related hypothesized to be form ornamentation. Geographic variation evident for mass seven different...
Abstract A large‐scale survey was conducted in August 2004 to estimate the size of Barents Sea polar bear subpopulation. We combined helicopter line transect distance sampling (DS) surveys most area with total counts small areas not suitable for DS. Due weather constraints we failed some originally planned be covered by For those, abundance estimated using a ratio estimator, which auxiliary variable number satellite telemetry fixes (in previous years). that subpopulation had approximately...
Polar bears (Ursus maritimus) are major predators in the Arctic marine ecosystem, feeding mainly on seals, and living closely associated with sea ice. Little is known of their gut microbial ecology main purpose this study was to investigate diversity faeces polar Svalbard, Norway (74-81 degrees N, 10-33 E). In addition level blaTEM alleles, encoding ampicillin resistance (ampr) were determined. total, ten samples collected from individual bears, rectum swabs five individuals 2004 2006.A 16S...
Polar bears are ice-associated marine mammals that known to swim and dive, yet their aquatic behaviour is poorly documented. Reductions in Arctic sea ice clearly a major threat this species, but understanding polar bears' potential behavioural plasticity with respect the ongoing changes requires knowledge of swimming diving skills. This study quantified time spent water by adult female (n = 57) via deployment various instruments bearing saltwater switches, some case pressure sensors (79...
Variation in space-use is common within mammal populations. In polar bears, Ursus maritimus, some individuals follow the sea ice (offshore bears) whereas others remain nearshore yearlong (coastal bears). We studied pollutant exposure relation to patterns vs coastal) adult female bears from Barents Sea equipped with satellite collars (2000–2014, n = 152). First, we examined differences home range (HR) size and position, body condition, diet proxies (nitrogen carbon stable isotopes, 116)...
Serum samples from 419 polar bears (Ursus maritimus) Svalbard and the Barents Sea (collected 1990-2000) 108 East Greenland 1999-2004) were assayed for antibodies against Toxoplasma gondii using modified agglutination test. Antibody prevalences 3.6% among cubs dependent on their mothers 21.4% subadults adults. Among adults there was an interaction between population sex, with similar females (Svalbard = 19.5%, 18.0%), but a high frequency males (28.7%) as compared to (5.8%). The pattern also...
Temporal trends of persistent organic pollutants (POPs: PCBs, OH-PCBs, p,p′-DDE, HCB, β-HCH, oxychlordane, BDE-47, and 153) in relation to changes feeding habits body condition adult female polar bears (Ursus maritimus) from the Barents Sea subpopulation were examined over 20 years (1997–2017). All 306 samples collected spring (April). Both stable isotope values nitrogen (δ15N) carbon (δ13C) red blood cells declined time, with a steeper trend for δ13C between 2012 2017, indicating decreasing...