Blar i forfatter "Derocher, Andrew E."

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    • Choose your poison – Space-use strategy influences pollutant exposure in Barents Sea polar bears 

      Tartu, Sabrina; Aars, Jon; Andersen, Magnus; Polder, Anuschka; Bourgeon, Sophie; Merkel, Benjamin; Lowther, Andrew D.; Bytingsvik, Jenny; Welker, Jeffrey Martin; Derocher, Andrew E.; Jenssen, Bjørn Munro; Routti, Heli (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-24)
      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 in relation to space-use patterns (offshore vs coastal) in adult female polar bears from the Barents Sea equipped with satellite collars (2000–2014, n = 152). First, ...

    • A risk assessment review of mercury exposure in Arctic marine and terrestrial mammals 

      Dietz, Rune; Letcher, Robert J.; Aars, Jon; Andersen, Magnus; Boltunov, Andrei; Born, Erik W.; Ciesielski, Tomasz Maciej; Das, Krishna; Dastnai, Sam; Derocher, Andrew E.; Desforges, Jean-Pierre; Eulaers, Igor; Ferguson, Steve; Hallanger, Ingeborg G.; Heide-Jørgensen, Mads P.; Heimbürger-Boavida, Lars-Eric; Hoekstra, Paul F.; Jenssen, Bjørn Munro; Kohler, Stephen Gustav; Larsen, Martin M.; Lindstrøm, Ulf Ove; Lippold, Anna; Morris, Adam; Nabe-Nielsen, Jacob; Nielsen, Nynne H.; Peacock, Elizabeth E.; Rigét, Frank F.; Rosing-Asvid, Aqqalu; Routti, Heli Anna Irmeli; Siebert, Ursula; Stenson, Garry; Stern, Gary; Strand, Jakob; Søndergaard, Jens; Treu, Gabriele; Víkingsson, Gisli A.; Wang, Feiyue; Welker, Jeffrey M.; Wilson, Simon J.; Sonne, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-16)
      There has been a considerable number of reports on Hg concentrations in Arctic mammals since the last Arctic Monitoring and Assessment Programme (AMAP) effort to review biological effects of the exposure to mercury (Hg) in Arctic biota in 2010 and 2018. Here, we provide an update on the state of the knowledge of health risk associated with Hg concentrations in Arctic marine and terrestrial mammal ...

    • Sea ice reduction drives genetic differentiation among Barents Sea polar bears 

      Maduna, Simo; Aars, Jon; Fløystad, Ida; Klutsch, Cornelya; Fiskebeck, Eve Marie Louise Zeyl; Wiig, Øystein; Ehrich, Dorothee; Andersen, Magnus; Bachmann, Lutz; Derocher, Andrew E.; Nyman, Tommi; Eiken, Hans Geir; Hagen, Snorre (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-08)
      Loss of Arctic sea ice owing to climate change is predicted to reduce both genetic diversity and gene flow in ice-dependent species, with potentially negative consequences for their long-term viability. Here, we tested for the population-genetic impacts of reduced sea ice cover on the polar bear (<i>Ursus maritimus</i>) sampled across two decades (1995–2016) from the Svalbard Archipelago, Norway, ...

    • Temporal trends of persistent organic pollutants in Barents Sea polar bears (Ursus maritimus) in relation to changes in feeding habits and body condition 

      Lippold, Anna; Bourgeon, Sophie; Aars, Jon; Andersen, Magnus; Polder, Anuschka; Lyche, Jan Ludvig; Bytingsvik, Jenny; Jenssen, Bjørn Munro; Derocher, Andrew E.; Welker, Jeffrey Martin; Routti, Heli (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-12-14)
      Temporal trends of persistent organic pollutants (POPs: PCBs, OH-PCBs, <i>p,p′</i>-DDE, HCB, β-HCH, oxychlordane, BDE-47, and 153) in relation to changes in feeding habits and body condition in adult female polar bears (<i>Ursus maritimus</i>) from the Barents Sea subpopulation were examined over 20 years (1997–2017). All 306 samples were collected in the spring (April). Both stable isotope values ...