Nye registreringer

  • Homage to Hersteinsson and Macdonald: climate warming and resource subsidies cause red fox range expansion and Arctic fox decline 

    Elmhagen, Bodil; Berteaux, Dominique; Burgess, Robert. M.; Ehrich, Dorothee; Gallant, Daniel; Henttonen, Heikki; Ims, Rolf Anker; Killengreen, Siw Turid; Niemimaa, Jukka; Norén, Karin; Ollila, Tuomo; Rodnikova, Anna Y.; Sokolov, Aleksandr A.; Sokolova, Natasha A.; Stickney, Alice A.; Angerbjörn, Anders (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-08-16)
    Climate change can have a marked effect on the distribution and abundance of some species, as well as their interspecific interactions. In 1992, before ecological effects of anthropogenic climate change had developed ...
  • Snowmobile impact on diurnal behaviour in the Arctic fox 

    Fuglei, Eva; Ehrich, Dorothee; Killengreen, Siw Turid; Rodnikova, Anna Y.; Sokolov, Aleksandr A.; Pedersen, Åshild Ønvik (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-08-16)
    As tourism increases globally, studies have documented impacts on wildlife from anthropogenic disturbances. In this observational experiment we aimed to investigate if snowmobile traffic affected the diurnal activity of ...
  • Ecosystem drivers of an Arctic fox population at the western fringe of the Eurasian Arctic 

    Ims, Rolf Anker; Killengreen, Siw Turid; Ehrich, Dorothee; Flagstad, Øystein; Hamel, Sandra; Henden, John-André; Jensvoll, Ingrid; Yoccoz, Nigel Gilles (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-08-16)
    The distribution of traditional breeding dens on the Varanger Peninsula (70–71°N) in northernmost Fennoscandia indicates that this area once harboured a large Arctic fox population. Early 20th century naturalists regarded ...
  • Hooded seal Cystophora cristata foraging areas in the Northeast Atlantic Ocean—Investigated using three complementary methods 

    Vacquie-Garcia, Jade; Lydersen, Christian; Biuw, Martin; Haug, Tore; Fedak, Michael A.; Kovacs, Kit M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-12-06)
    Identifying environmental characteristics that define the ecological niche of a species is essential to understanding how changes in physical conditions might affect its distribution and other aspects of its ecology. The ...
  • Gene-centromere mapping in meiotic gynogenetic European seabass 

    Oral, Münevver; Colléter, Julie; Bekaert, Michaël; Taggart, John B.; Palaoikostas, Christos; McAndrew, Brendan J.; Vandeputte, Marc; Chatain, Béatrice; Kuhl, Heiner; Reinhardt, Richard; Peruzzi, Stefano; Penman, David J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-06-07)
    Background: <br> Fully isogenic lines in fish can be developed using “mitotic” gynogenesis (suppression of first zygotic mitosis following inactivation of the sperm genome). However, genome-wide verification of the steps ...
  • Activity of xyloglucan endotransglucosylases/hydrolases suggests a role during host invasion by the parasitic plant Cuscuta reflexa 

    Olsen, Stian; Krause, Kirsten (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-27)
    The parasitic vines of the genus Cuscuta form haustoria that grow into other plants and connect with their vascular system, thus allowing the parasite to feed on its host. A major obstacle that meets the infection organ ...
  • Transcriptome analysis identifies key metabolic changes in the hooded seal (Cystophora cristata) brain in response to hypoxia and reoxygenation 

    Hoff, Mariana Leivas Müller; Fabrizius, Andrej; Czech-Damal, Nicole U.; Folkow, Lars; Burmester, Thorsten (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-01-03)
    The brain of diving mammals tolerates low oxygen conditions better than the brain of most terrestrial mammals. Previously, it has been demonstrated that the neurons in brain slices of the hooded seal (Cystophora cristata) ...
  • Diving behaviour of Atlantic salmon at sea: effects of light regimes and temperature stratification 

    Hedger, Richard David; Rikardsen, Audun H.; Strøm, John Fredrik; Righton, David A.; Thorstad, Eva Bonsak; Næsje, Tor (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-07-04)
    The diving behaviour of adult Atlantic salmon Salmo salar L. post-spawners in the Norwegian and Barents Seas was monitored with pop-up satellite archival tags (PSATs) and data storage tags (DSTs). Salmon from the 3 studied ...
  • Climate warming enhances polar cod recruitment, at least transiently 

    Bouchard, Caroline; Geoffroy, Maxime; LeBlanc, Mathieu; Majewski, Andrew; Gauthier, Stéphane; Walkusz, Wojciech; Reist, James D.; Fortier, Louis (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-06-27)
    Polar cod (Boreogadus saida) is the dominant forage fish in Arctic seas and the main prey of the ringed seal (Pusa hispida), the beluga (Delphinapterus leucas) and several seabird species. Changes in the abundance of polar ...
  • The relative effects of farm management versus climate on lamb autumn weights 

    Pedersen, Elisabeth (Master thesis; Mastergradsoppgave, 2008-05-15)
    Abstract In this study I ask if farm management have such large effects on sheep (Ovis aries) production that climatic studies could be improved by taking it into account. The relative effects of climate and farm management ...
  • Estimating survival rate in Brünnich's guillemot (Uria lomvia) chicks. A study of mark-recapture methods using photo series data 

    Lorentzen, Erlend (Master thesis; Mastergradsoppgave, 2008-05)
    Three different mark-recapture models were applied to resighting data for Brünnich's guillemot (Uria lomvia) chicks obtained from photo series. Performances of the various models as potential tools for estimating chick ...
  • Winter behaviour of riverine anadromous Arctic charr and sea trout in northern Norway 

    Jensen, Jenny Lovisa Alexandra (Master thesis; Mastergradsoppgave, 2008-05)
    Based on earlier migration studies of lake-dwelling anadromous Arctic charr Salvelinus alpinus (L.) and sea trout Salmo trutta L. in northern Norway, both species are believed to solely overwinter in fresh water and spend ...
  • Vole abundance and reindeer carcasses determine breeding activity of Arctic foxes in low Arctic Yamal, Russia 

    Ehrich, Dorothee; Cerezo, Maite; Rodnikova, Anna Y.; Sokolova, Natalya A.; Fuglei, Eva; Shtro, Victor; Sokolov, Aleksandr A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-09-16)
    High latitude ecosystems are at present changing rapidly under the influence of climate warming, and specialized Arctic species at the southern margin of the Arctic may be particularly affected. The Arctic fox (Vulpes ...
  • Regulation of gene expression is associated with tolerance of the Arctic copepod Calanus glacialis to CO2-acidified sea water 

    Bailey, Allison Michelle; De Wit, Pierre; Thor, Peter; Browman, Howard; Bjelland, Reidun Marie; Shema, Steven; Fields, David M.; Runge, Jeffrey A.; Thompson, Cameron; Hop, Haakon (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-08-02)
    Ocean acidification is the increase in seawater pCO2 due to the uptake of atmospheric anthropogenic CO2, with the largest changes predicted to occur in the Arctic seas. For some marine organisms, this change in pCO2, and ...
  • Sea ice thermohaline dynamics and biogeochemistry in the Arctic Ocean: Empirical and model results 

    Duarte, Pedro; Meyer, Amelie; Olsen, Lasse Mork; Kauko, Hanna Maria; Assmy, Philipp; Rösel, Anja; Itkin, Polona; Hudson, Stephen R.; Granskog, Mats A.; Gerland, Sebastian; Sundfjord, Arild; Steen, Harald; Hop, Haakon; Cohen, Lana; Peterson, Algot Kristoffer; Jeffery, Nicole; Elliott, Scott M.; Hunke, Elizabeth Clare; Turner, Adrian K. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-07-11)
    Large changes in the sea ice regime of the Arctic Ocean have occurred over the last decades justifying the development of models to forecast sea ice physics and biogeochemistry. The main goal of this study is to evaluate ...
  • The seeding of ice algal blooms in Arctic pack ice: The multiyear ice seed repository hypothesis 

    Olsen, Lasse Mork; Laney, Samuel R.; Duarte, Pedro; Kauko, Hanna M.; Fernández-Méndez, Mar; Mundy, Christopher John; Rösel, Anja; Meyer, Amelie; Itkin, Polona; Cohen, Lana; Peeken, Ilka; Tatarek, Agnieszka; Róźańska-Pluta, Magdalena; Wiktor, Josef; Taskjelle, Torbjørn; Pavlov, Alexey; Hudson, Stephen R.; Granskog, Mats A.; Hop, Haakon; Assmy, Philipp (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-07-03)
    During the Norwegian young sea ICE expedition (N-ICE2015) from January to June 2015 the pack ice in the Arctic Ocean north of Svalbard was studied during four drifts between 83° and 80°N. This pack ice consisted of a mix ...
  • From polar night to midnight sun: Diel vertical migration, metabolism and biogeochemical role of zooplankton in a high Arctic fjord (Kongsfjorden, Svalbard) 

    Darnis, Gérald; Hobbs, Laura; Geoffroy, Maxime; Grenvald, Julie Cornelius; Renaud, Paul; Berge, Jørgen; Cottier, Finlo Robert; Kristiansen, Svein; Daase, Malin; Søreide, Janne; Wold, Anette; Morata, Nathalie; Gabrielsen, Tove M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-03-24)
    Zooplankton vertical migration enhances the efficiency of the ocean biological pump by translocating carbon (C) and nitrogen (N) below the mixed layer through respiration and excretion at depth. We measured C and N active ...
  • Shared predation and its impact on two sympatric rodent species. Adding to nature’s complexity 

    Moen, Anthine (Master thesis; Mastergradsoppgave, 2017-09-03)
    I used a theoretical model with different predatory preference relationships but with no direct competition. Simulated time series were statistically analysed to evaluate changes in rodent dynamics, with respect to ...
  • Using food web structure based on stable nitrogen and carbon isotopes to investigate pelagic-benthic coupling in different areas of the Barents Sea 

    Tillman, Ann Mikaela (Master thesis; Mastergradsoppgave, 2017-11-15)
    Pelagic-benthic coupling is generally assumed to be tighter on Arctic shelves than in lower latitudes, due to for example pronounced seasonal cycles of sunlight and primary production and a potential mismatch between the ...
  • Ungulate population monitoring in an open tundra landscape: distance sampling versus total counts 

    Le Moullec, Mathilde; Pedersen, Åshild Ønvik; Yoccoz, Nigel Gilles; Aanes, Ronny; Tufto, Jarle; Hansen, Brage Bremset (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-07-27)
    Researchers and wildlife managers strive for low bias and high precision (i.e. high accuracy) when estimating animal population sizes. Distance sampling is currently one of the most widely used monitoring methods. However, ...

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