• A.D. McIntyre (ed) : book review : Life in the world's oceans - diversity, distribution and abundance. 

      Jobling, Malcolm (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
    • Abscisic acid regulates anthocyanin biosynthesis and gene expression associated with cell wall modification in ripening bilberry (vaccinium myrtillus l.) fruits 

      Karppinen, Katja Hannele; Tegelberg, Pinja; Häggman, Hely; Jaakola, Laura (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-29)
      Ripening of non-climacteric bilberry (Vaccinium myrtillus L.) fruit is characterized by a high accumulation of health-beneficial anthocyanins. Plant hormone abscisic acid (ABA) and sucrose have been shown to be among the central signaling molecules coordinating non-climacteric fruit ripening and anthocyanin accumulation in some fruits such as strawberry. Our earlier studies have demonstrated an ...
    • 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 as it penetrates the host tissue is the rigid plant cell wall. In the present study, we examined the activity of xyloglucan endotransglucosylases/hydrolases (XTHs) during the ...
    • Adaptive flexibility in the feeding behaviour of brown trout: optimal prey size 

      Sanchez-Hernandez, Javier; Cobo, Fernando (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-02-18)
      Background Brown trout, Salmo trutta Linnaeus, 1758, is a species of significant conservation and socio-economic importance. A consequence of this importance is the enormous amount of literature that has been published on the species in the last few decades. In general terms, brown trout has been considered as a size-selective predator, even though it is able to feed on a wide range of prey sizes. ...
    • The adaptive significance of chromatophores in the Arctic under-ice amphipod Apherusa glacialis 

      Fuhrmann, Mona Maria; Nygård, Henrik Andreas; Krapp, Rupert; Berge, Jørgen; Werner, Iris (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      Solar radiation is a crucial factor governing biological processes in polar habitats. Containing harmful ultraviolet radiation (UVR), it can pose a threat for organisms inhabiting surface waters of polar oceans. The present study investigated the physiological color change in the obligate sympagic amphipod Apherusa glacialis mediated by red-brown chromatophores, which cover the body and internal ...
    • Adaptive temperature regulation in the little bird in winter: predictions from a stochastic dynamic programming model 

      Brodin, Anders; Nilsson, Jan‑Åke; Nord, Andreas (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-08-03)
      Several species of small birds are resident in boreal forests where environmental temperatures can be −20 to −30 °C, or even lower, in winter. As winter days are short, and food is scarce, winter survival is a challenge for small endothermic animals. A bird of this size will have to gain almost 10% of its lean body mass in fat every day to sustain overnight metabolism. Birds such as parids (titmice ...
    • The advective origin of an under-ice spring bloom in the Arctic Ocean using multiple observational platforms 

      Johnsen, Geir; Norli, Marit; Moline, Mark A.; Robbins, Ian; Quillfeldt, Cecilie von; Sørensen, Kai; Cottier, Finlo Robert; Berge, Jørgen (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-13)
      Under-ice blooms of phytoplankton in the Chukchi Sea have been observed, with strong implications for our understanding of the production regimes in the Arctic Ocean. Using a combination of satellite remote sensing of phytoplankton biomass, in situ observations under sea ice from an autonomous underwater vehicle (AUV), and in vivo photophysiology, we examined the composition, magnitude and origin ...
    • Age-dependent genetic structure of arctic foxes in Svalbard 

      Ehrich, Dorothee; Carmichael, Lindsey; Fuglei, Eva (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
    • 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 being hot spots for biological activity, ridges are under-studied largely because they are complex structures that are difficult to sample. Snow infiltration communities can grow at ...
    • Allometric trajectories of body and head morphology in three sympatric Arctic charr (Salvelinus alpinus (L.)) morphs 

      Simonsen, Marianne; Siwertsson, Anna; Adams, Colin Ean; Amundsen, Per-Arne; Præbel, Kim; Knudsen, Rune (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-08-08)
      A study of body and head development in three sympatric reproductively isolated Arctic charr (Salvelinus alpinus (L.)) morphs from a subarctic lake (Skogsfjordvatn, northern Norway) revealed allometric trajectories that resulted in morphological differences. The three morphs were ecologically assigned to a littoral omnivore, a profundal benthivore and a profundal piscivore, and this was confirmed ...
    • The amphipod scavenging guild in two Arctic fjords : seasonal variations, abundance and trophic interactions 

      Nygård, Henrik Andreas; Berge, Jørgen; Søreide, Janne; Vihtakari, Mikko; Falk-Petersen, Stig (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      Scavenging amphipods are important for the circulation and dispersal of organic material in the marine environment. Despite their dominance in the scavenging guild and importance in the food web, little is known about Arctic amphipods and their feeding preferences. We studied the amphipod scavenging guild using baited traps for one full year to increase our understanding of its seasonal variations. ...
    • Analysing diet of small herbivores : the efficiency of DNA barcoding coupled with high-throughput pyrosequencing for deciphering the composition of complex plant mixtures 

      Valentini, Alice; Soininen, Eeva Marjatta; Coissac, Eric; Ims, Rolf Anker; Miquel, Christian; Yoccoz, Nigel Gilles; Gielly, Ludovic; Brochmann, Christian; Brysting, Anne K.; Sønstebø, Jørn H.; Taberlet, Pierre (Journal article; Tidsskriftartikkel; Peer reviewed, 2009-08-20)
      Background: In order to understand the role of herbivores in trophic webs, it is essential to know what they feed on. Diet analysis is, however, a challenge in many small herbivores with a secretive life style. In this paper, we compare novel (high-throughput pyrosequencing) DNA barcoding technology for plant mixture with traditional microhistological method. We analysed stomach contents of two ...
    • Analyzing the proximity to cover in a landscape of fear: A new approach applied to fine-scale habitat use by rabbits facing feral cat predation on Kerguelen archipelago 

      Blanchard, Pierrick; Lauzeral, Christine; Chamaille-Jammes, Simon; Yoccoz, Nigel Gilles; Pontier, Dominique (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-03-07)
      Although proximity to cover has been routinely considered as an explanatory variable in studies investigating prey behavioral adjustments to predation pressure, the way it shapes risk perception still remains equivocal. This paradox arises from both the ambivalent nature of cover as potentially both obstructive and protective, making its impact on risk perception complex and context-dependent, and ...
    • Anthocyanin Profile in Berries of Wild and Cultivated Vaccinium spp. along Altitudinal Gradients in the Alps 

      Zoratti, Laura; Jaakola, Laura; Häggman, Hely; Giongo, Lara (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-09-16)
      Vaccinium spp. berries provide some of the best natural sources of anthocyanins. In the wild bilberry (Vaccinium myrtillus L.), a clear increasing trend in anthocyanin biosynthesis has been reported toward northern latitudes of Europe, but studies related to altitude have given contradictory results. The present study focused on the anthocyanin composition in wild bilberries and highbush blueberry ...
    • Anthropogenic hybridization between endangered migratory and commercially harvested stationary whitefish taxa (Coregonus spp.) 

      Dierking, Jan; Phelps, Luke; Præbel, Kim; Ramm, Gesine; Prigge, Enno; Borcherding, J; Brunke, M; Eizaguirre, Christophe (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
    • Anti-angiogenic VEGFAxxxb transcripts are not expressed in the medio-basal hypothalamus of the seasonal sheep 

      Lomet, Didier; Piegu, Benoit; Wood, Shona Hiedi; Dardente, Hugues (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-05-10)
      This study investigated Vegfa expression in the pars tuberalis (PT) of the pituitary and medio-basal hypothalamus (MBH) of sheep, across seasons and reproductive states. It has recently been proposed that season impacts alternative splicing of Vegfa mRNA in the PT, which shifts the balance between angiogenic VEGFAxxx and anti-angiogenic VEGFAxxxb isoforms (with xxx the number of amino acids of the ...
    • Antihyperglycemic Effect of Ganoderma Lucidum Polysaccharides on Streptozotocin-Induced Diabetic Mice 

      Li, Fenglin; Zhang, Yiming; Zhong, Zhijian (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      The current study evaluated the glucose-lowering effect of ganoderma lucidum polysaccharides (Gl-PS) in streptozotocin (STZ)-induced diabetic mice. The diabetic mice were randomly divided into four groups (8 mice per group): diabetic control group, low-dose Gl-PS treated group (50 mg/kg, Gl-PS), high-dose Gl-PS treated group (150 mg/kg, Gl-PS) and positive drug control treated group (glibenclamide, ...
    • Antimicrobial resistance in wildlife – potential for dissemination: Opinion of the Panel on Microbial Ecology of the Norwegian Scientific Committee for Food and Environment 

      Nielsen, Kaare Magne; Gjøen, Tor; Asare, Nana Yaa Ohene; Lunestad, Bjørn Tore; Ytrehus, Bjørnar; Yazdankhah, Siamak Pour; Godfroid, Jacques; Jelmert, Anders; Klein, Joern; Okoli, Arinze Stanley; Tronsmo, Arne (Research report; Forskningsrapport, 2018-03-16)
      <p>Antimicrobial resistance (AMR) is recognised as one of the greatest public health concerns of our time. The development of AMR occurs in nature as a defence by microbes against naturally occurring antimicrobials. However, the selective pressure, generated by the use of antimicrobial agents in human and veterinary medicine, livestock and plant production as well as aquaculture practices, is the ...
    • Antioxidant defenses in polar cod (Boreogadus saida) and responsiveness toward dietary crude oil exposure 

      Vieweg, Ireen; Benedetti, Maura; Lanzoni, Ilaria; Regoli, Francesco; Nahrgang, Jasmine (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-06-13)
      Increasing anthropogenic activities in the Arctic pose the risk for accidental oil spills but our knowledge of ecotoxicological effects is still limited for Arctic organisms. This study aimed to provide insights in baseline levels of antioxidants in polar cod (<i>Boreogadus saida</i>) from different Arctic locations and investigate the susceptibility of this species to oxidative stress during a 32 ...
    • Approaches for delaying sexual maturation in salmon and their possible ecological and ethical implications 

      Iversen, Marianne; Myhr, Anne Ingeborg; Wargelius, Anna (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-07-21)
      The aquaculture industry is under pressure to satisfy global demand for marine foods. Atlantic salmon has been bred for more than 40 years, and substantial progress has been made within the culturing and breeding programs. The improved growth rate of Atlantic salmon has been accompanied by an earlier onset of maturation. Among the factors controlling maturation in salmon are photoperiod, temperature, ...