Blar i forfatter "Kovacs, Kit"

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    • An Arctic predator–prey system in flux: climate change impacts on coastal space use by polar bears and ringed seals 

      Hamilton, Charmain Danielle; Kovacs, Kit; Ims, Rolf Anker; Aars, Jon; Lydersen, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-17)
      <p>1. Climate change is impacting different species at different rates, leading to alterations in biological interactions with ramifications for wider ecosystem functioning. Understanding these alterations can help improve predictive capacity and inform management efforts designed to mitigate against negative impacts.</p> <p>2. We investigated how the movement and space use patterns of polar bears ...

    • At the rainbow's end: high productivity fueled by winter upwelling along an Arctic shelf 

      Falk-Petersen, Stig; Pavlov, Vladimir; Berge, Jørgen; Cottier, Finlo; Kovacs, Kit; Lydersen, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2015)

    • Harbour seal Phoca vitulina movement patterns in the high-Arctic archipelago of Svalbard, Norway 

      Blanchet, Marie-Anne Ermeline; Lydersen, Christian; Ims, Rolf Anker; Lowther, Andrew D.; Kovacs, Kit (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-09-03)
      Harbour seals Phoca vitulina are mainly considered a temperate species, but the world’s northernmost population resides year-round in the high-Arctic archipelago of Svalbard. In this study we document post-moulting at-sea movements of 30 individuals from this population using satellite relay data loggers deployed in the autumns of 2009 and 2010. All of the seals showed a strong preference for ...

    • Haul-out behaviour of the world's northernmost population of harbour seals (Phoca vitulina) throughout the year 

      Hamilton, Charmain Danielle; Lydersen, Christian; Ims, Rolf Anker; Kovacs, Kit (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)

    • Seasonal, oceanographic and atmospheric drivers of diving behaviour in a temperate seal species living in the high arctic 

      Blanchet, Marie-Anne Ermeline; Lydersen, Christian; Ims, Rolf Anker; Kovacs, Kit (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-07-21)
      The harbour seal (Phoca vitulina) population in Svalbard marks the northernmost limit of the species’ range. This small population experiences environmental extremes in sea and air temperatures, sea ice cover and also in light regime for this normally temperate species. This study deployed Conductivity Temperature Depth Satellite Relay Data Loggers (CTDSRDLs) on 30 adult and juvenile harbour ...

    • The World's Northernmost Harbour Seal Population - How Many Are There? 

      Merkel, Benjamin; Lydersen, Christian; Yoccoz, Nigel; Kovacs, Kit (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      This study presents the first abundance estimate for the world’s northernmost harbour seal (Phoca vitulina) population, which resides in Svalbard, Norway, based on three digital stereoscopic photographic surveys conducted in 2009 and 2010. The counts from these high resolution 3D images were combined with a novel method for estimating correction factors for animals that were in the water at the ...