Now showing items 68-87 of 204

    • Factors affecting scent-marking behavior in Eurasian beaver (Castor fiber) 

      Rosell, Frank; Nolet, Bart A. (Journal article; Peer reviewed, 1997)
      We tested the hypothesis that a main function of territory marking in Eurasian beaver (Castor fiber) is defense of the territory. The results showed that. (1) beaver colonies with close neighbors scent-mark more often than ...
    • 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 ...
    • Field anaesthetic and surgical techniques for implantation of intraperitoneal radio transmitters in Eurasian beavers Castor fiber 

      Ranheim, Birgit; Rosell, Frank; Haga, Henning Andreas; Arnemo, Jon Martin (Journal article; Peer reviewed, 2004)
      Radio transmitters were implanted intraperitoneally in 22 (nine females, 13 males) adult, territorial Eurasian beavers Castor fiber under field conditions. Two different injectable anaesthestic drug combinations were tested. ...
    • 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 ...
    • Free-ranging Eurasian beavers, Castor fiber, deposit anal gland secretion when scent marking 

      Rosell, Frank; Bergan, Frode (Journal article; Peer reviewed, 1998)
      Two adult free-ranging Eurasian Beavers (Castor fiber) were observed depositing anal gland secretion at the border of thei territory byeverting the "cloaca", protruding the anal gland openings and rubbing them against the ...
    • Genetic structure in an expanding cervid population after population reduction 

      Haanes, Hallvard; Røed, Knut H.; Flagstad, Øystein; Rosef, Olav (Journal article; Peer reviewed, 2009)
      The Norwegian red deer population (Cervus elaphus) was from the mid eighteenth to the early twentieth century drastically reduced in size and distribution but has the last century expanded both demographically and spatially. ...
    • Genetic variation and structure in Norwegian red deer 

      Haanes, Hallvard (Doctoral thesis; Peer reviewed, 2008-07)
      In all species the abundance and distribution of populations vary through time and space, but recently major changes in the size and range of many populations have been observed. Population contractions and founder events ...
    • Genetic variation of ticks (Ixodes ricinus L.) in the Lithuanian and Norwegian populations 

      Paulauskas, Algimantas; Radzijevskaja, Jana; Rosef, Olav; Turčinavičienė, Jurga; Ambrasiene, Daiva; Makareviciute, Dovile (Journal article; Peer reviewed, 2006)
      RAPD markers were used to measure the genetic diversity of 119 individuals of Ixodes ricinus collected from Lithuania and Norway. The samples were analysed within and also between the populations. We analysed 74 loci in ...
    • GPX Pro198Leu and OGG1 Ser326Cys polymorphisms and risk of development of colorectal adenomas and colorectal cancer 

      Hansen, Rikke; Sæbø, Mona; Skjelbred, Camilla Furu; Nexø, Bjørn Andersen; Hagen, Per Chr.; Bock, Günther; Lothe, Inger Marie Bowitz; Johnson, Egil; Aase, Steinar; Hansteen, Inger-Lise; Vogel, Ulla; Kure, Elin H. (Journal article; Peer reviewed, 2005)
      Little is known about genetic risk factors for colorectal cancer. We assessed the association between polymorphisms in two genes involved in DNA repair of oxidative stress, GPX and OGG1, and risk of colorectal carcinoma ...
    • Grunnundersøkelser i forbindelse med grunnvannforsyning til Gvammen, Hjartdal kommune 

      Klempe, Harald (Working paper, 1980)
      Undersøkelsesboringen viser en elveavsetning over 5 m tykt torvlag som veksler med tynne gruslag. Under følger en avsetning av stein, sand og grus. Sonderboringen 100 m unna viser nesten samme profil. Det vannførende laget ...
    • 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 ...
    • Haematological and serum biochemical reference values in free-ranging red deer (Cervus elaphus atlanticus) 

      Rosef, Olav; Nystøyl, Håvard L.; Solenes, Tore; Arnemo, Jon Martin (Journal article; Peer reviewed, 2004)
      Analyses of haematological and biochemical constituents were carried out on the Norwegian subspecies of free-ranging red deer (Cervus elaphus atlanticus). All animals were captured from January to March by using a mixture ...
    • Harvesting of males delays female breeding in a socially monogamous mammal : the beaver 

      Rosell, Frank; Mysterud, Atle (Journal article; Peer reviewed, 2007)
      Human exploitation may skew adult sex ratios in vertebrate populations to the extent that males become limiting for normal reproduction. In polygynous ungulates, females delay breeding in heavily harvested populations, but ...
    • Herbivore grazing—or trampling? Trampling effects by a large ungulate in cold high- latitude ecosystems 

      Heggenes, Jan; Odland, Arvid; Chevalier, Tomas; Ahlberg, Jörgen; Berg, Amanda; Larsson, Håkan; Bjerketvedt, Dag Kjartan (Journal article; Peer reviewed, 2017)
      Mammalian herbivores have important top-down effects on ecological processes and landscapes by generating vegetation changes through grazing and trampling. For free-ranging herbivores on large landscapes, trampling is an ...
    • Heritability of head size in a hunted large carnivore, the brown bear (Ursus arctos) 

      Rivrud, Inger Maren; Frank, Shane; Bischof, Richard; Mysterud, Atle; Steyaert, Sam; Hertel, Anne Gabriela; Hagen, Snorre; Eiken, Hans Geir; Swenson, Jon; Zedrosser, Andreas (Journal article; Peer reviewed, 2019)
      Wild animal populations experience selection pressures from both natural and anthropogenic sources. The availability of extensive pedigrees is increasing along with our ability to quantify the heritability and evolvability ...
    • Hunting promotes sexual conflict in brown bears 

      Gosselin, Jacinthe; Leclerc, Martin; Zedrosser, Andreas; Steyaert, Sam; Swenson, Jon; Pelletier, Fanie (Journal article; Peer reviewed, 2017)
      The removal of individuals through hunting can destabilize social structure, potentially affecting population dynamics. Although previous studies have shown that hunting can indirectly reduce juvenile survival through ...
    • Hunting promotes spatial reorganization and sexually selected infanticide 

      Leclerc, Martin; Frank, Shane C.; Zedrosser, Andreas; Swenson, Jon; Pelletier, Fanie (Journal article; Peer reviewed, 2017)
      Harvest can affect the ecology and evolution of wild species. The removal of key individuals, such as matriarchs or dominant males, can disrupt social structure and exacerbate the impact of hunting on population growth. ...
    • 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 ...
    • Identification of salmon population bottlenecks from low flows in a hydro-regulated river 

      Adeva Bustos, Ana; Hedger, Richard David; Fjeldstad, Hans-Petter; Stickler, Morten; Alfredsen, Knut (Journal article; Peer reviewed, 2019)
      Flow regime alterations from hydropower regulation may impact fish populations. Impacts can be characterized using methods for mapping bottlenecks for different species life stages. Improving the understanding of such ...