Viser treff 5013-5032 av 5086

    • When the brain goes diving: transcriptome analysis reveals a reduced aerobic energy metabolism and increased stress proteins in the seal brain 

      Fabrizius, Andrej; Hoff, Mariana Leivas Müller; Engler, Gerhard; Folkow, Lars; Burmester, Thorsten (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-09)
      <b>Background: </b>During long dives, the brain of whales and seals experiences a reduced supply of oxygen (hypoxia). The brain neurons of the hooded seal (Cystophora cristata) are more tolerant towards low-oxygen conditions than those of mice, and also better survive other hypoxia-related stress conditions like a reduction in glucose supply and high concentrations of lactate. Little is known ...
    • When to stop searching in a highly uncertain world? A theoretical and experimental investigation of “two-way” sequential search tasks 

      Bouhlel, Imen; Chessa, Michela; Festre, Agnes Monique Marie; Guerci, Eric (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-13)
      When to stop exploring is crucial in contexts where learning to manage time and uncertainty is critical for carrying out successful initiatives (e.g., innovation, personnel recruitment, vaccine discovery). We investigate analytically and experimentally the exploration-exploitation trade-offs in such contexts. A “two-way” sequential search task is proposed, where the classical exploration-exploitation ...
    • Where are they now? – A case study of the impact of international travel support for early career Arctic researchers 

      Majaneva, Sanna Kristiina; Hamon, Gwenaelle; Fugmann, Gerlis Ursula; Lisowska, Maja; Baeseman, Jenny Lynn (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-09)
      Supporting and training the next generation of researchers is crucial to continuous knowledge and leadership in Arctic research. An increasing number of Arctic organizations have developed initiatives to provide travel support for Early Career Researchers (ECRs) to participate in workshops, conferences and meetings and to network with internationally renowned scientific leaders. However, there has ...
    • Where do the treeless tundra areas of northern highlands fit in the global biome system: toward an ecologically natural subdivision of the tundra biome 

      Virtanen, Risto; Oksanen, Lauri Kalervo; Oksanen, Tarja Maarit; Cohen, Juval; Forbes, Bruce C.; Johansen, Bernt; Käyhkö, Jukka; Olofsson, Johan; Pulliainen, Jouni; Tømmervik, Hans (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-12-15)
      According to some treatises, arctic and alpine sub-biomes are ecologically similar, whereas others find them highly dissimilar. Most peculiarly, large areas of northern tundra highlands fall outside of the two recent subdivisions of the tundra biome. We seek an ecologically natural resolution to this long-standing and far-reaching problem. We studied broad-scale patterns in climate and ...
    • Whirly proteins as communicators between plant organelles and the nucleus? 

      Krause, Kirsten; Herrmann, Ullrich; Fuss, Janina; Miao, Ying; Krupinska, Karin (Journal article; Tidsskriftartikkel; Peer reviewed, 2009)
      Whirly proteins belong to a small family of proteins with a characteristic secondary structure and a conserved DNA binding domain that is found mainly in angiosperms. At least one member of the Whirly protein family, Whirly1, is dually targeted to the nucleus and to the chloroplasts and it was shown that apart from its initially described function as a transcriptional regulator of nuclear disease ...
    • Who are the future seaweed consumers in a Western society? Insights from Australia 

      Birch, Dawn; Skallerud, Kåre; Paul, Nicholas A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-09)
      <i>Purpose</i>: The purpose of this paper is to profile the consumers who are likely to eat seaweed products in Australia.<p> <p><i>Design/methodology/approach</i>: The study was conducted as an online survey among 521 Australian consumers. Binary logistic regression modelling was used to profile the consumers.<p> <p><i>Findings</i>: The paper identifies education, familiarity, food ...
    • Who Eats Seaweed? An Australian Perspective 

      Birch, Dawn; Skallerud, Kåre; Paul, Nicholas (Journal article; Tidsskriftartikkel, 2018-12-14)
      Current seaweed consumption and attitudes and preferences toward seaweed food products in a Western society are investigated to inform the seaweed industry regarding product development and marketing strategies. A national survey of 521 Australian consumers was conducted. About 75% of respondents had eaten seaweed; however, only 37% had consumed seaweed regularly over the past 12 months. Key drivers ...
    • Who's at risk in the backcountry? Effects of individual characteristics on hypothetical terrain choices 

      Mannberg, Andrea; Hendrikx, Jordy; Landrø, Markus; Ahrland Stefan, Martin (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-18)
      We use data from an online survey in Norway (N = 467, 73% male; age: M = 34, SD = 10.07) to analyze hypothetical choices in hazardous avalanche terrain. We further analyze differences in stated preference for and willingness to accept to ski relatively risky terrain. Our results suggest that risk attitudes and perception constitute important determinants for hypothetical terrain choices. We further ...
    • Whole genome sequencing reveals development of structured salmon lice (Lepeophtheirus salmonis, Krøyer, 1838) populations among aquaculture net pens through production 

      Brække, Nora (Master thesis; Mastergradsoppgave, 2023-05-15)
      Salmon louse, (Lepeophtheirus salmonis, Krøyer, 1838), is an ectoparasite that causes multiple health and economic problems in the farming of Atlantic salmon (Salmo salar L.), but also threatens wild salmonid species. The industry is struggling to identify proper measures for limiting lice infections, and to identify effective delousing treatments. One of the major production and management challenges, ...
    • Why and how to regulate Norwegian salmon production? – The history of Maximum Allowable Biomass (MAB) 

      Hersoug, Bjørn (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-05)
      Salmon farming has been a great success story in Norway over the last 50 years, but the industry is still much disputed. Right from the start, farmers were licensed, with a limit on total production. In addition, each site was regulated according to carrying capacity. Over the years, various management measures have been used to regulate both the total production and environmental conditions, before ...
    • Why are Svalbard Arctic foxes Brucella spp. seronegative? 

      Nymo, Ingebjørg Helena; Fuglei, Eva; Mørk, Torill; Breines, Eva Marie; Holmgren, Karin Elisabeth; Davidson, Rebecca K.; Tryland, Morten (Journal article; Tidsskriftartikkel, 2022-07-06)
      Arctic foxes (Vulpes lagopus) are susceptible to smooth Brucella (s-Brucella) infection and may be exposed to such bacteria through the consumption of infected marine mammals, as implied by the finding of s-Brucella antibodies in polar bears (Ursus maritimus). Arctic foxes in Svalbard have not previously been investigated for s-Brucella antibodies, but such antibodies have been detected in Arctic ...
    • Why do Prices Change? An Analysis of Supply and Demand Shifts and Price Impacts in the Farmed Salmon Market 

      Brækkan, Eivind Hestvik (Doctoral thesis; Doktorgradsavhandling, 2014-09-01)
      Price changes in any market are essentially due to shifts in supply relative to demand. In a global market there can be several simultaneous supply and demand shifts in different geographical locations, all affecting prices to different extents. This dissertation focuses on procedures for measuring such shifts and their relative effects on prices by looking at the global market for farmed salmon ...
    • Why do the boreal forest ecosystems of Northwestern Europe differ from those of Western North America? 

      Boonstra, Rudy; Andreassen, Harry Peter; Boutin, Stan; Husek, Jan; Ims, Rolf Anker; Krebs, Charles J.; Skarpe, Christina; Wabakken, Petter (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-07-20)
      The boreal forest is one of the largest terrestrial biomes on Earth. Conifers normally dominate the tree layer across the biome, but other aspects of ecosystem structure and dynamics vary geographically. The cause of the conspicuous differences in the understory vegetation and the herbivore–predator cycles between northwestern Europe and western North America presents an enigma. Ericaceous dwarf ...
    • Why don't all species overexploit? 

      Vuorinen, Katariina Elsa Maria; Oksanen, Tarja Maarit; Oksanen, Lauri; Vuorisalo, Timo; Speed, James David Mervyn (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-14)
      Overexploitation of natural resources is often viewed as a problem characteristic of only the human species. However, any species could evolve a capacity to overexploit its essential resources through natural selection and competition, even to the point of resource collapse. Here, we describe the processes that potentially lead to overexploitation and synthesize what is known about overexploitation ...
    • Why enter the church on holiday? Tourist encounters with the Basilica of Santa Maria in Trastevere, Rome 

      Smørvik, Kjersti Karijord (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-17)
      The tourist is constantly seeking out new experiences, and there is a growing interest in experiences at religious sites. This article examines tourists’ church experience, and what meaning it gives, and what motivates tourists to visit a church on their holiday. With a particular focus on the individual’s experience creation, the article looks into the tourist’s personal experience inside a church, ...
    • Why Not Use the Sea? A Shared Value Approach to Sustainable Value Creation When Using Carbon Dioxide as a Valuable Resource in Manufacturing 

      Agwu, Ukeje; Oftedal, Elin Merethe; Bertella, Giovanna (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-20)
      Interest on the creation of sustainable value has recently increased as a response to global issues caused by traditional business-as-usual logic. Indeed, corporations pursuing profits and competitive advantage at the expense of social and environmental resources has become a source of pressing concern and institutionalized unsustainability needs to be reversed. To create sustainable value, a paradigm ...
    • Why potential entry may increase platform sponsors' profit 

      Foros, Øystein; Sand, Jan Yngve; Kind, Hans Jarle (Working paper; Arbeidsnotat, 2005-09)
      In this paper we analyze the incentives for platform sponsors to open up their networks for independent rivals. We show that open access may increase the platform sponsors’ profit levels and enhance quality improving investments.
    • Why Rudolph's nose is red: observational study 

      Ince, Can; van Kuijen, Anne-Marie; Milstein, Dan M J; Yürük, Koray; Folkow, Lars; Fokkens, Wytske J; Blix, Arnoldus S (Journal article; Tidsskriftartikkel, 2012-12-17)
      Objective To characterise the functional morphology of the nasal microcirculation in humans in comparison with reindeer as a means of testing the hypothesis that the luminous red nose of Rudolph, one of the most well known reindeer pulling Santa Claus’s sleigh, is due to the presence of a highly dense and rich nasal microcirculation.<p> <p>Design Observational study.<p> <p>Setting Tromsø, ...
    • Wicked problems: management complexities in the Atlantic bluefin tuna fisheries 

      Lunndal, Ingvild (Master thesis; Mastergradsoppgave, 2012-05-15)
      This study examines the complexities of achieving sufficient management measures for the Atlantic Bluefin Tuna, with an attempt to specify failure and shortcomings within the management system. The key to the solution is embedded in man-made governance systems and legal frameworks. With this thesis I will try to unfold the complexities of governance systems, the legal framework of fisheries ...
    • A Widely Distributed Thraustochytrid Parasite of Diatoms Isolated from the Arctic Represents a gen. and sp. nov. 

      Hassett, Brandon (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-06)
      A unicellular, heterotrophic, eukaryotic parasite was isolated from nearshore Arctic marine sediment in association with the diatom <i>Pleurosigma</i> sp. The parasite possessed ectoplasmic threads that could penetrate diatom frustules. Healthy and reproducing <i>Pleurosigma</i> cultures would begin to collapse within a week following the introduction of this parasite. The parasite (2–10 μm diameter) ...