Nye registreringer

  • Gjenfangst av laks (Salmo salar L.) etter fang og slipp-praksis i norske elver 

    Johansen, Martin Rognli (Master thesis; Mastergradsoppgave, 2017-05-18)
    Som følge av at norske laksebestander har blitt redusert i løpet av de siste tiårene har det blitt vanligere å gjenutsette laks i forbindelse med sportsfiske. Noen av disse gjenutsatte laksene er rapportert å gjenfanges, ...
  • Haul-out behaviour of walruses (Odobenus rosmarus) monitored by camera stations - potential impacts of tourist visitations 

    Øren, Kine (Master thesis; Mastergradsoppgave, 2017-05-16)
    The rapid growth of tourism in Polar Regions stimulates a need for investigating potential impacts on targeted species and sensitive areas, such as walrus (Odobenus rosmarus) haul-out sites. This study examines effects of ...
  • Spawning behavior of Arctic charr (Salvelinus alpinus): spawning synchrony, vibrational communication and mate guarding. 

    Brattli, Magnus Beyer (Master thesis; Mastergradsoppgave, 2017-05-15)
    A mismatch between male and female gamete release can result in reduced or failed fertilization in external fertilizers, sperm competition and reduced paternity. Here, I video monitored spawning behavior of free living ...
  • Strategies for timing of nest departure in the common guillemot Uria aalge 

    Johansen, Malin Kjellstadli (Master thesis; Mastergradsoppgave, 2017-05-15)
    Duration of parental care in avian species varies widely, from altricial to precocial species. The seabird family Alcidae is unique among birds in the variation of mass and age at nest departure. The common guillemot Uria ...
  • An empirical analysis of cultural ecosystem values in coastal landscapes 

    Brown, Greg; Hausner, Vera Helene (Journal article; Tidsskriftartikkel, 2017)
    Coastal areas are especially important to human well-being with half the world's population living within 60 km of the sea and three-quarters of all large cities located in the coastal zone. Supporting and regulatory ...
  • Effects of exhaustive swimming and subsequent recuperation on flesh quality in unstressed Atlantic cod (Gadus morhua) 

    Svalheim, Ragnhild Aven; Karlsson-Drangsholt, Anders; Olsen, Stein Harris; Johnsen, Helge K.; Aas-Hansen, Øyvind (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-25)
    Wild Atlantic cod of commercial size (1.9 ± 0.5 kg) were swum to exhaustion in a large swim tunnel in an attempt to mimic the initial stage of trawling, when fish swim at the trawl mouth until they fatigue or lose interest ...
  • Brucella antibodies in alaskan true seals and eared seals — two different stories 

    Nymo, Ingebjørg H.; Rødven, Rolf; Beckmen, Kimberlee; Larsen, Anett K.; Tryland, Morten; Quakenbush, Lori; Godfroid, Jacques (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-31)
    Brucella pinnipedialis was first isolated from true seals in 1994 and from eared seals in 2008. Although few pathological findings have been associated with infection in true seals, reproductive pathology including abortions, ...
  • Estimating population trends of a riparian bird community in low-Arctic tundra. 

    Koren, Clémence (Master thesis; Mastergradsoppgave, 2018-02-15)
    In the Northern Norway tundra, willow thicket along river valleys create a more productive environment than the surrounding open tundra and host a rich community of bird species by providing food, shelter from predators ...
  • Nutrients vs. turbulence, and the future of Arctic Ocean primary production 

    Randelhoff, Achim; Sundfjord, Arild; Fer, Ilker; Reigstad, Marit; Tremblay, Jean-Eric; Guthrie, John D. (Conference object; Konferansebidrag, 2016-11)
    This poster presents estimates of nitrate fluxes in the Arctic Ocean and speculates on the associated primary production in a future climate.
  • Seasonal variability and fluxes of nitrate in the surface waters over the Arctic shelf slope 

    Randelhoff, Achim; Sundfjord, Arild; Reigstad, Marit (Conference object; Konferansebidrag, 2015-03)
    Understanding the present state and possible future scenarios of Arctic Ocean primary productivity has been hampered by the scarcity of year-round nutrient measurements. Here, the first year-long ...
  • Black-legged kittiwakes as messengers of Atlantification in the Arctic 

    Vihtakari, Mikko; Welcker, Jorg; Moe, Børge; Chastel, Olivier; Tartu, Sabrina; Hop, Haakon; Bech, Claus; Descamps, Sébastien; Gabrielsen, Geir W. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-19)
    Climate warming is rapidly altering marine ecosystems towards a more temperate state on the European side of the Arctic. However, this “Atlantification” has rarely been confirmed, as long-term datasets on Arctic marine ...
  • Algal hot spots in a changing Arctic Ocean: Sea-ice ridges and the snow-ice interface 

    Fernández-Méndez, Mar; Olsen, Lasse Mork; Kauko, Hanna M.; Meyer, Amelie; Rösel, Anja; Merkouriadi, Ioanna; Mundy, Christopher John; Ehn, Jens K.; Johansson, Malin; Wagner, Penelope Mae; Ervik, Åse; Sorrell, BK; Duarte, Pedro; Wold, Anette; Hop, Haakon; Assmy, Phillipp (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-12)
    During the N-ICE2015 drift expedition north-west of Svalbard, we observed the establishment and development of algal communities in first-year ice (FYI) ridges and at the snow-ice interface. Despite some indications of ...
  • Year-round CH4 and CO2 flux dynamics in two contrasting freshwater ecosystems of the subarctic 

    Jammet, Mathilde; Dengel, Sigrid; Kettner, Ernesto; Parmentier, Frans-Jan W.; Wik, Martin; Crill, Patrick; Friborg, Thomas (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-21)
    Lakes and wetlands, common ecosystems of the high northern latitudes, exchange large amounts of the climate-forcing gases methane (CH4) and carbon dioxide (CO2) with the atmosphere. The magnitudes of these fluxes and the ...
  • Revealing the full ocean migration of individual Atlantic salmon 

    Strøm, John Fredrik; Thorstad, Eva Bonsak; Hedger, Richard David; Rikardsen, Audun H. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-14)
    Knowledge of the complete horizontal migration and vertical movements of Atlantic salmon (Salmo salar L.) during the marine phase is important for understanding the link between individual processes and population recruitment. ...
  • Orf virus infection in Alaskan mountain goats, Dall’s sheep, muskoxen, caribou and Sitka black-tailed deer 

    Tryland, Morten; Beckmen, Kimberlee B.; Burek-Huntington, Kathleen; Breines, Eva Marie; Klein, Joern (Journal article, 2018-02-21)
    Background: <br>The zoonotic Orf virus (ORFV; genus Parapoxvirus, Poxviridae family) occurs worldwide and is transmit‑ted between sheep and goats, wildlife and man. Archived tissue samples from 16 Alaskan wildlife cases, ...
  • Short-term herbivory has long-term consequences in warmed and ambient high Arctic tundra 

    Little, Chelsea J; Cutting, Helen; Alatalo, Juha; Cooper, Elisabeth J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-01-25)
    Climate change is occurring across the world, with effects varying by ecosystem and region but already occurring quickly in high-latitude and high-altitude regions. Biotic interactions are important in determining ecosystem ...
  • Prey diversity as a driver of resource partitioning between river-dwelling fish species 

    Sanchez-Hernandez, Javier; Gabler, Heidi-Marie; Amundsen, Per-Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-02-26)
    Although food resource partitioning among sympatric species has often been explored in riverine systems, the potential influence of prey diversity on resource partitioning is little known. Using empirical data, we modeled ...
  • Cold acclimation in warmer extended autumns impairs freezing tolerance of perennial ryegrass (Lolium perenne) and timothy (Phleum pratense) 

    Dalmannsdottir, Sigridur; Jørgensen, Marit; Rapacz, Marcin; Østrem, Liv; Larsen, Arild; Rødven, Rolf; Rognli, Odd Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-02-01)
    The effect of variable autumn temperatures in combination with decreasing irradiance and daylength on photosynthesis, growth cessation and freezing tolerance was investigated in northern- and southern3 adapted populations ...
  • A simplified method to estimate Diphyllobothrium spp. infection in salmonids 

    Kuhn, Jesper A.; Knudsen, Rune; Kristoffersen, Roar; Amundsen, Per-Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-10-13)
    Some fish parasites constitute severe management problems as they may cause mortality of their fish host or are important zoonoses of humans. Parasite assessments are therefore critical to keep track of infections. If ...
  • Variation in functional trait composition of benthic invertebrates across depths and seasons in a subarctic lake 

    Frainer, André; Johansen, Kristin M. Sommerseth; Siwertsson, Anna; Mousavi, Seyed Ali; Brittain, John Edward; Klemetsen, Anders; Knudsen, Rune; Amundsen, Per-Arne (Journal article; Tidsskriftartikkel, 2016-07-01)
    Benthic invertebrate communities play a fundamental role in lake ecosystems, and the understanding of how those benthic communities are structured, particularly in terms of the identity and spatiotemporal distribution of ...

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