Now showing items 1-20 of 672

  • McAdam, Stephen N.; Fleckenstein, Burkhard; Rasmussen, Ingunn B; Sandlie, Inger; Bogen, Bjarne; Vinter, N.J.; Sollid, Ludvig Magne (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2001)
    Type-B T cells raised against the immunodominant peptide in hen egg lysozyme (HEL(48-62)) do not respond to whole lysozyme, and this has been thought to indicate that peptide can bind to I-A(k) in different conformations. ...
  • Hoel, Gøril Thorvaldsen (Master thesis / Masteroppgave, 2008)
    Local diversity (alpha diversity) of macrobenthos in tropical, temperate and arctic soft-bottom regions was investigated. Macrobenthos are here defined as animals retained on a1mm sieve. Species abundance data from the ...
  • Frigstad, Helene; Andersen, Tom; Hessen, Dag Olav; Naustvoll, L..J.; Johnsen, Torbjørn Martin; Bellerby, Richard (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
    Seston is suspended particulate organic matter, comprising a mixture of autotrophic, heterotrophic and detrital material. Despite variable proportions of these components, marine seston often exhibits relatively small ...
  • Villar, Jaime Otero; Jensen, Arne Johan; L'abee-Lund, Jan Henning; Stenseth, Nils Christian; Storvik, Geir Olve; Vøllestad, Leif Asbjørn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
    Many Atlantic salmon, Salmo salar, populations are decreasing throughout the species' distributional range probably due to several factors acting in concert. A number of studies have documented the influence of freshwater ...
  • Kausrud, Kyrre Linné; Grégoire, Jean-Claude; Skarpaas, Olav; Erbilgin, Nadir; Gilbert, Marius; Økland, Bjørn; Stenseth, Nils Christian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
    Bark beetles (Coleoptera: Curculionidae, Scolytinae) feed and breed in dead or severely weakened host trees. When their population densities are high, some species aggregate on healthy host trees so that their defences may ...
  • Riotte-Lambert, Louise; Remy, Alice Melisande Jacynthe; Andreassen, Harry Peter (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    The introduction of immigrants into resident populations may disturb the social organisation of the latter. It is often stated that males compete with males for access to mates, while females compete with females and/or ...
  • Martinsen, Vegard; Mulder, Jan; Austrheim, Gunnar; Hessen, Dag Olav; Mysterud, Atle (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    Alpine ecosystems are generally nitrogen (N) limited with low rates of N mineralization. Herbivory may affect N cycling and N losses and thus long-term productivity of ecosystems. Using a controlled grazing experiment ...
  • Reitan, Trond; Schweder, Tore; Henderiks, Jorijntje (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    Time series of cell size evolution in unicellular marine algae (division Haptophyta; Coccolithus lineage), covering 57 million years, are studied by a system of linear stochastic differential equations of hierarchical ...
  • Yedid, Gabriel; Stredwick, Jason; Ofria, Charles A.; Agapow, Paul-Michael (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    The effect of mass extinctions on phylogenetic diversity and branching history of clades remains poorly understood in paleobiology. We examined the phylogenies of communities of digital organisms undergoing open-ended ...
  • Holen, Øistein Haugsten; Svennungsen, Thomas Owens (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    Aposematic prey use conspicuous warning signals to advertise their defenses to predators. It has long been recognized that the efficiency of a warning signal may be reduced if poorly defended prey (automimics) are present ...
  • Ohlberger, Jan; Langangen, Øystein; Stenseth, Nils Christian; Vøllestad, Leif Asbjørn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    Ecological interactions determine the structure and dynamics of communities and their responses to the environment. Understanding the community-level effects of ecological interactions, such as intra- and interspecifc ...
  • Solberg, Ingrid; Klevjer, Thor A.; Kaartvedt, Stein (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    The clupeid fish Sprattus sprattus was studied in a 150 m deep Norwegian fjord throughout an entire overwintering period during which the fjord froze over and a major water renewal occurred. A bottom-mounted (upward-facing) ...
  • Mysterud, Atle; Bischof, Richard; Loe, Leif Egil; Odden, John; Linnell, John Durrus (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    Understanding the drivers of seasonal migration among large herbivores is crucial for management and conservation. The forage maturation hypothesis predicts migration even at low population density, due to the benefits of ...
  • Ruus, Anders; Daae, Ingrid Aarre; Hylland, Ketil (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2012)
    Bioaccumulation of sediment‐associated polychlorinated biphenyls (PCBs) was examined in Atlantic cod (Gadus morhua) through direct diffusion from the sediment (via the water phase) and through the food chain (dietary ...
  • Tomter, Ane Berg; Zoppellaro, Giorgio; Bell, Caleb B.; Barra, Anne-Laure; Andersen, Niels Højmark; Solomon, Edward I.; Andersson, K. Kristoffer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    Ribonucleotide reductase (RNR) catalyzes the rate limiting step in DNA synthesis where ribonucleotides are reduced to the corresponding deoxyribonucleotides. Class Ib RNRs consist of two homodimeric subunits: R1E, which ...
  • Qviller, Lars; Olsen, Nina Risnes; Bærum, Kim Magnus; Meisingset, Erling L.; Loe, Leif Egil; Ytrehus, Bjørnar; Viljugrein, Hildegunn; Mysterud, Atle (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
    Partial migration is common among northern ungulates, typically involving an altitudinal movement for seasonally migratory individuals. The main driving force behind migration is the benefit of an extended period of access ...
  • Egge, Elianne Sirnæs; Bittner, Lucie; Andersen, Tom; Audic, Stéphane; de Vargas, Colomban; Edvardsen, Bente (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
    Next generation sequencing of ribosomal DNA is increasingly used to assess the diversity and structure of microbial communities. Here we test the ability of 454 pyrosequencing to detect the number of species present, and ...
  • Wilschut, Liesbeth I; Addink, Elisabeth A; Heesterbeek, Hans; Heier, Lise; Laudisoit, Anne; Begon, Mike; Davis, Stephen; Dubyanskiy, Vladimir M; Burdelov, Leonid A; de Jong, Steven M (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
    Background Plague (Yersinia pestis infection) is a vector-borne disease which caused millions of human deaths in the Middle Ages. The hosts of plague are mostly rodents, and the disease is spread by the ...
  • Eikeset, Anne Marie; Richter, Andries Peter; Dankel, Dorothy; Dunlop, Erin; Heino, Mikko Petteri; Dieckmann, Ulf; Stenseth, Nils Christian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
    Harvest control rules (HCRs) have been implemented for many fisheries worldwide. However, in most instances, those HCRs are not based on the explicit feedbacks between stock properties and economic considerations. This ...
  • Durant, Joel Marcel; Ottersen, Geir; Stenseth, Nils Christian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
    Understanding the drivers (internal and external) that determine the productivity of marine ecosystems is challenging. For example, the correct estimate of recruitment is essential to estimate fish stock abundance. In this ...