Institutt for natur, helse og miljø: Nye registreringer

Viser treff 141-160 av 321

    • A human-induced landscape of fear influences foraging behavior of brown bears 

      Lodberg-Holm, Hanna Kavli; Gelink, Henriette Wathne; Hertel, Anne Gabriela; Swenson, Jon; Domevscik, Matej; Steyaert, Sam (Journal article; Peer reviewed, 2018)
      Animals adapt their foraging behavior to variations in food availability and predation risk. In Sweden, brown bears (Ursus arctos) depend on a nearly continuous intake of berries, especially bilberries (Vaccinium myrtillus) ...

    • First 10Be measurements at Trondheim 1 MV AMS 

      Seiler, Martin; Anjar, Johanna; Værnes, Einar; Nadeau, Marie-Josée; Scognamiglio, Grazia (Journal article; Peer reviewed, 2018)
      The performance of the Trondheim 1 MV AMS system for 10Be measurements has been investigated. While the initial acceptance tests were done using the 1 + 1+ charge state, we concluded that the 2 + 2+ charge state offers ...

    • Environmental factors influencing mercury speciation in Subarctic and Boreal lakes 

      Braaten, Hans Fredrik Veiteberg; de Wit, Heleen; Fjeld, Eirik; Rognerud, Sigurd; Lydersen, Espen; Larssen, Thorjørn (Journal article; Peer reviewed, 2014)
      Environmental drivers of total mercury (TotHg) concentrations, methylmercury (MeHg) concentrations, and MeHg fractions (a proxy for methylation potential, expressed as %MeHg) were assessed in a synoptic study of 51 lakes ...

    • The influence of permanently submerged macrophytes on sediment mercury distribution, mobility and methylation potential in a brackish Norwegian fjord 

      Olsen, Marianne; Schaanning, Morten; Braaten, Hans Fredrik Veiteberg; Eek, Espen; Moy, Frithjof Emil; Lydersen, Espen (Journal article; Peer reviewed, 2018)
      Macrophytes are shown to affect the microbial activity in different aqueous environments, with an altering of the sediment cycling of mercury (Hg) as a potential effect. Here, we investigated how a meadow with permanently ...

    • Performance of GPS units for deployment on semiaquatic animals 

      Justicia, Lia Schlippe; Rosell, Frank; Mayer, Martin (Journal article; Peer reviewed, 2018)
      Global Positioning System (GPS) technology is widely used in wildlife research to study animal movement and habitat use. In order to evaluate the quality and reliability of GPS data, the factors influencing the performance ...

    • Are trampling effects by wild tundra reindeer understudied? 

      Heggenes, Jan; Odland, Arvid; Bjerketvedt, Dag (Journal article; Peer reviewed, 2018)
      Grazing and trampling by the wide-ranging wild tundra reindeer may have major top down landscape effects by causing vegetation changes. Grazing, as the collective effect of eating, trampling, defecation, and urination, has ...

    • OSL dating of Weichselian ice-free periods at Skorgenes, Western Norway 

      Anjar, Johanna; Alexanderson, Helena; Larsen, Eiliv; Lyså, Astrid (Journal article; Peer reviewed, 2018)
      During recent years, many sites with sediments pre-dating the Last Glacial Maximum have been identified in formerly glaciated areas. As more and better dates are presented from these sites, the dynamic behaviour of the ...

    • Abrupt high-latitude climate events and decoupled seasonal trends during the Eemian 

      Salonen, J. Sakari; Helmens, Karin F.; Brendryen, Jo; Kuosmanen, Niina; Väliranta, Minna; Goring, Simon; Korpela, Mikko; Kylander, Malin; Philip, Annemarie; Plikk, Anna; Renssen, Hans; Luoto, Miska (Journal article; Peer reviewed, 2018)
      The Eemian (the Last Interglacial; ca. 129–116 thousand years ago) presents a testbed for assessing environmental responses and climate feedbacks under warmer-than-present boundary conditions. However, climate syntheses ...

    • Can concentrations of steroid hormones in brown bear hair reveal age class? 

      Cattet, Marc; Stenhouse, Gordon B.; Boulanger, John; Janz, David M.; Kapronczai, Luciene; Swenson, Jon; Zedrosser, Andreas (Journal article; Peer reviewed, 2018)
      Although combining genetic and endocrine data from non-invasively collected hair samples has potential to improve the conservation of threatened mammals, few studies have evaluated this opportunity. In this study, we ...

    • Repeated five-day administration of L-BMAA, microcystin-LR, or as mixture, in adult C57BL/6 mice - lack of adverse cognitive effects 

      Myhre, Oddvar; Eide, Dag Markus; Kleiven, Synne; Utkilen, Hans Christian; Hofer, Tim (Journal article; Peer reviewed, 2018)
      The cyanobacterial toxins β-methylamino-L-alanine (L-BMAA) and microcystin-LR (MC-LR; a potent liver toxin) are suspected to cause neurological disorders. Adult male C57BL/6JOlaHsd mice aged approximately 11 months were ...

    • Hunting regulation favors slow life histories in a large carnivore 

      Van de Walle, Joanie; Pigeon, Gabriel; Zedrosser, Andreas; Swenson, Jon; Pelletier, Fanie (Journal article; Peer reviewed, 2018)
      As an important extrinsic source of mortality, harvest should select for fast reproduction and accelerated life histories. However, if vulnerability to harvest depends upon female reproductive status, patterns of selectivity ...

    • Agricultural landscapes and the Loire River influence the genetic structure of the marbled newt in Western France 

      Costanzi, Jean-Marc; Pascal, Mege; Alexandre, Boissinot; Francis, Isselin-Nondedeu; Sandra, Guerin; Olivier, Lourdais; Audrey, Trochet; Quentin, Le Petitcorps; Agathe, Legrand; Francois, Varenne; Pierre, Grillet; Sophie, Morin-Pinaud; Damien, Picard (Journal article; Peer reviewed, 2018)
      Amphibians are particularly sensitive to landscape fragmentation. Potential barriers between breeding sites can negatively infuence the dispersal of individuals and increase genetic structure between populations. In this ...

    • Development and evaluation of 16 new microsatellite loci for the rock ptarmigan (Lagopus muta) and cross-species amplification for the willow grouse (L. lagopus) 

      Costanzi, Jean-Marc; Bergan, Frode; Sæbø, Mona; Jenkins, Andrew; Steifetten, Øyvind (Journal article; Peer reviewed, 2018)
      Abstract The genetic markers designed for this study can facilitate future genetic studies on the rock ptarmigan (Lagopus muta). To our knowledge no microsatellite markers have ever been developed specifically for this ...

    • Determinants of lifetime reproduction in female brown bears: early body mass, longevity, and hunting regulations 

      Zedrosser, Andreas; Pelletier, Fanie; Bischof, Richard; Festa-Bianchet, Marco; Swenson, Jon (Journal article; Peer reviewed, 2013)
      In iteroparous mammals, conditions experienced early in life may have long‐lasting effects on lifetime reproductive success. Human‐induced mortality is also an important demographic factor in many populations of large ...

    • Serum cytokine profiles and metabolic tumor burden in patients with non-small cell lung cancer undergoing palliative thoracic radiation therapy 

      Eide, Hanne Astrid; Knudtsen, Ingerid Skjei; Sandhu, Vandana; Løndalen, Ayca; Halvorsen, Ann Rita; Abravan, Azadeh; Kure, Elin H.; Bogsrud, Trond; Brustugun, Odd Terje; Kyte, Jon A; Malinen, Eirik; Helland, Åslaug (Journal article; Peer reviewed, 2018)
      Purpose: Radiation therapy effectively kills cancer cells and elicits local effects in the irradiated tissue. The aim of this study was to investigate the kinetics of cytokines in the serum of patients with lung cancer ...

    • Proteolysis inhibition by hibernating bear serum leads to increased protein content in human muscle cells 

      Chanon, Stéphanie; Chazarin, Blandine; Toubhans, Benoit; Durand, Christine; Chery, Isabelle; Robert, Maud; Vieille-Marchiset, Aurélie; Swenson, Jon; Zedrosser, Andreas; Evans, Alina; Brunberg, Sven; Arnemo, Jon Martin; Gauquelin-Koch, Guillemette; Storey, Kenneth B.; Simon, Chantal; Blanc, Stéphane; Bertile, Fabrice; Lefai, Etienne (Journal article; Peer reviewed, 2018)
      Muscle atrophy is one of the main characteristics of human ageing and physical inactivity, with resulting adverse health outcomes. To date, there are still no efficient therapeutic strategies for its prevention and/or ...

    • Life histories and ecotype conservation in an adaptive vertebrate: Genetic constitution of piscivorous brown trout covaries with habitat stability 

      Wollebæk, Jens; Heggenes, Jan; Røed, Knut H. (Journal article; Peer reviewed, 2018)
      Ecotype variation in species exhibiting different life history strategies may reflect heritable adaptations to optimize reproductive success, and potential for speciation.Traditionally, ecotypes have, however, been defined ...

    • Gut retention time in captive brown bears Ursus arctos 

      Elfström, Marcus; Støen, Ole-Gunnar; Zedrosser, Andreas; Warrington, Ian; Swenson, Jon (Journal article; Peer reviewed, 2013)
      Knowing animals’ gut retention time (GRT) for important food items is critical when using non-invasive studies based on faecal remains, e.g. when analysing nutritive quality of food, or relating diet or behaviour to ...

    • Faecal spectroscopy: a practical tool to assess diet quality in an opportunistic omnivore 

      Steyaert, Sam; Hütter, Franziska J.; Elfström, Marcus; Zedrosser, Andreas; Hackländer, Klaus; Le, Minh Hung; Windisch, Wilhelm M.; Swenson, Jon; Isaksson, Tomas (Journal article; Peer reviewed, 2012)
      Faecal indices of dietary quality can provide useful knowledge about the general ecology of a species, but only if the measurements are accurate and the results are interpreted with caution. In this article, we evaluated ...

    • Spatial and temporal trends of mercury in freshwater fish in Fennoscandia (1965-2015) 

      Braaten, Hans Fredrik Veiteberg; Åkerblom, Staffan; de Wit, Heleen; Skotte, Gunnar; Rask, Martti; Vuorenmaa, Jussi; Kahilainen, Kimmo Kalevi; Malinen, Tommi; Rognerud, Sigurd; Lydersen, Espen; Amundsen, Per-Arne; Kashulin, Nicholas; Kashulina, Tatiana; Terentyev, Petr; Christensen, Guttorm; Jackson-Blake, Leah Amber; Lund, Espen; Rosseland, Bjørn Olav (NIVA-rapport;, Research report, 2017)
      Mercury (Hg) emissions to the atmosphere cause elevated Hg levels in fish, even in many remote regions of the world. Here we present an extensive database of more than 50 000 measurements of Hg in fish, including 2 775 ...