Now showing items 1341-1360 of 5233

    • High genomic diversity in the endangered East Greenland Svalbard Barents Sea stock of bowhead whales (Balaena mysticetus) 

      Cerca, José; Westbury, Michael V; Heide-Jørgensen, Mads-Peter; Kovacs, Kit M.; Lorenzen, Eline D.; Lydersen, Christian; Shpak, Olga V.; Wiig, Øystein; Bachmann, Lutz (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-12)
      The East Greenland-Svalbard-Barents Sea (EGSB) bowhead whale stock (Balaena mysticetus) was hunted to near extinction and remains Endangered on the International Union of Conservation of Nature Red List. The intense, temporally extensive hunting pressure may have left the population vulnerable to other perturbations, such as environmental change. However, the lack of genomic baseline data renders ...
    • Connecting people and ideas from around the world: Global innovation platforms for next-generation ecology and beyond 

      Jørgensen, Peter Søgaard; Barraquand, Frédéric; Bonhomme, Vincent; Curran, Timothy J.; Cieraad, Ellen; Ezard, Thomas G.; Gherardi, Laureano A.; Hayes, R. Andrew; Poisot, Timothee; Salguero-Gòmez, Roberto; DeSoto, Lucia; Swartz, Brian; Talbot, Jennifer M.; Wee, Brian; Zimmerman, Naupaka (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-04-28)
      We present a case for using Global Community Innovation Platforms (GCIPs), an approach to improve innovation and knowledge exchange in international scientific communities through a common and open online infrastructure. We highlight the value of GCIPs by focusing on recent efforts targeting the ecological sciences, where GCIPs are of high relevance given the urgent need for interdisciplinary, ...
    • On the Interplay between Cannibalism and Harvest in Stage-Structured Population Models 

      Wikan, Arild (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06-17)
      By use of a nonlinear stage-structured population model the role of cannibalism and the combined role of cannibalism and harvest have been explored. Regarding the model, we prove that in most parts of parameter space it is permanent. We also show that the transfer from stability to nonstationary dynamics always occurs when the unique stable equilibrium undergoes a supercritical Neimark-Sacker (Hopf) ...
    • Bakteriell gjellebetennelse hos rognkjeks (Cyclopterus lumpus) 

      Furnesvik, Lisa; Erkinharju, Toni; Hansen, Miroslava (Journal article; Tidsskriftartikkel; Peer reviewed, 2021)
      Veterinærinstituttet mottok i januar i år en innsendelse fra et settefiskanlegg for rognkjeks. Rognkjeksen var 10-13 gram og uvaksinert. Settefiskanlegget er et gjennomstrømningsanlegg med sjøvann. Det var mistanke om gjelleproblematikk da det ble rapportert om døde individer med utspilte gjellelokk og bleke gjeller. Ved Veterinærinstituttet ble det gjennomført histopatologiske og immunhistokjemiske ...
    • Conceptualizing fishery systems: A mental models approach 

      Sam, Theodora (Doctoral thesis; Doktorgradsavhandling, 2022-04-22)
      Thinking of fisheries as a system is a relatively new approach in fisheries science and management. As part of my contribution to this perspective, this thesis uses mental models as a new approach to gain insights into how individuals conceptualize fisheries. Mental models are internal representations of the surrounding world (e.g., phenomena, processes, problems) and they are important because these ...
    • Leadership aiming at innovation: suggesting and discussing four roles of an innovation leader 

      Skålsvik, Hugo; Adriaenssen, Daniel J.; Johannessen, Jon-Arild (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-09-27)
      Organizations often experience problems and challenges due to the development of rigid bureaucratic rules and procedures, which may represent obstacles to creativity and innovation. In a global knowledge economy, innovation is an important competitive parameter. Consequently, anything that may stimulate innovation in an organization’s creative energy fields is valuable. This paper addresses one ...
    • Land-Ocean Interactions in a Changing Arctic: Effects of terrestrial inputs on coastal food-web carbon source and contamination in Isfjorden, Svalbard 

      McGovern, Maeve (Doctoral thesis; Doktorgradsavhandling, 2022-04-29)
      Climate change driven increases in temperature are enhancing land-ocean connectivity in the coastal Arctic, with a range of implications for coastal food-webs and contaminant cycling. Terrestrial inputs are a direct source of carbon and legacy contaminants to coastal areas, but as a source of freshwater, nutrients and suspended inorganic sediments, they can also affect coastal food-webs and contaminant ...
    • Niche separation between two dominant crustacean predators in European estuarine soft-bottom habitats 

      Siegenthaler, Andjin; Wangensteen, Owen S.; Benvenuto, Chiara; Lollobrigidi, Riccardo; Mariani, Stefano (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-05)
      Epibenthic predators in estuarine shallow soft-bottom environments are generally considered to have broad ecological niches with a wide overlap. This allows them to cope with abundant but highly variable prey communities. The assessment of trophic relationships in shallow soft-bottom habitats is, however, challenging and often complicated by the bias and low resolution of the analytical tools available ...
    • Structural and functional analyses of Rubisco from arctic diatom species reveal unusual posttranslational modifications 

      Valegård, Karin; Andralojc, P. John; Haslam, Richard P.; Pearce, F. Grant; Eriksen, Gunilla Kristina; Madgwick, Pippa J.; Kristoffersen, Anne Karin; van Lun, Michiel; Klein, Uwe; Eilertsen, Hans Christian; Parry, Martin A.J.; Andersson, Inger (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-20)
      The catalytic performance of the major CO<sub>2</sub>-assimilating enzyme, ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), restricts photosynthetic productivity. Natural diversity in the catalytic properties of Rubisco indicates possibilities for improvement. Oceanic phytoplankton contain some of the most efficient Rubisco enzymes, and diatoms in particular are responsible for a significant ...
    • Greater topoclimatic control of above‐ versus below‐ground communities 

      Mod, Heidi K.; Scherrer, Daniel; Di Cola, Valeria; Broennimann, Olivier; Blandenier, Quentin; Breiner, Frank T.; Buri, Aline; Goudet, Jérôme; Guex, Nicolas; Lara, Enrique; Mitchell, Edward A. D.; Niculita‐Hirzel, Hélène; Pagni, Marco; Pellissier, Loïc; Pinto‐Figueroa, Eric; Sanders, Ian R.; Schmidt, Benedikt R.; Seppey, Victor William Christophe; Singer, David; Ursenbacher, Sylvain; Yashiro, Erika; van der Meer, Jan R.; Guisan, Antoine (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-31)
      Assessing the degree to which climate explains the spatial distributions of different taxonomic and functional groups is essential for anticipating the effects of climate change on ecosystems. Most effort so far has focused on above-ground organisms, which offer only a partial view on the response of biodiversity to environmental gradients. Here including both above- and below-ground organisms, we ...
    • Bioprospecting of marine microorganisms for the discovery of antibacterial compounds - Isolation, structure elucidation and bioactivity assessment of marine microbial natural products 

      Jenssen, Marte (Doctoral thesis; Doktorgradsavhandling, 2022-04-27)
      <p>Infectious diseases have been a problem for humans since the beginning of human existence. The “golden age” of antibiotics started at the end of the 1920s, with the discovery of penicillin by Sir Alexander Fleming. This was followed by the discovery of several life-saving antibiotics. The number of new marketed antibiotics has declined, and most pharmaceutical companies are no longer working in ...
    • Investigating the drivers of the Nordic Seas food-web dynamics using Chance and Necessity modelling 

      Sivel, Elliot (Doctoral thesis; Doktorgradsavhandling, 2022-04-22)
      Marine ecosystems are under pressures of human activities that have altered their dynamics and structure during the last five decades, but there can also vary due to internal dynamics or chance. Managers focus on human activities and often ignore the contribution of internal dynamics and chance to ecosystem dynamics in the decision-making process. In this thesis, I use food-web modelling based on ...
    • Ethical By Designer - How to Grow Ethical Designers of Artificial Intelligence 

      Vanhée, Loïs; Borit, Melania (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-13)
      Ethical concerns regarding Artificial Intelligence (AI) technology have fueled discussions around the ethics training received by AI designers. We claim that training designers for ethical behaviour, understood as habitual application of ethical principles in any situation, can make a significant difference in the practice of research, development, and application of AI systems. Building on ...
    • Native range estimates for red-listed vascular plants 

      Borgelt, Jan; Parada, Jorge Sicacha; Skarpaas, Olav; Verones, Francesca (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-29)
      Besides being central for understanding both global biodiversity patterns and associated anthropogenic impacts, species range maps are currently only available for a small subset of global biodiversity. Here, we provide a set of assembled spatial data for terrestrial vascular plants listed at the global IUCN red list. The dataset consists of pre-defned native regions for 47,675 species, density ...
    • A host-free transcriptome for haustoriogenesis in Cuscuta campestris: signature gene expression identifies markers of successive development stages 

      Bawin, Thomas Georges A; Bruckmüller, Julien-Alexander; Olsen, Stian; Krause, Kirsten (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-20)
      The development of the infection organ of the parasitic angiosperm genus Cuscuta is a dynamic process that is normally obscured from view as it happens endophytically in its host. We artificially induced haustoriogenesis in C. campestris by far-red light to define specific morphologically different stages and analyze their transcriptional patterns. This information enabled us to extract sets of ...
    • Net heterotrophy in High Arctic first-year and multi-year spring sea ice 

      Campbell, Karley; Lange, Benjamin; Landy, Jack Christopher; Katlein, Christian; Nicolaus, Marcel; Anhaus, Philipp; Matero, Ilkka; Gradinger, Rolf; Charette, Joannie; Duerksen, Steven; Tremblay, Pascal; Rysgaard, Søren; Tranter, Martyn; Haas, Christian; Michel, Christine (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-04)
      The net productivity of sea ice is determined by the physical and geochemical characteristics of the ice–ocean system and the activity of organisms inhabiting the ice. Differences in habitat suitability between first-year and multi-year sea ice can affect the ice algal community composition and acclimation state, introducing considerable variability to primary production within each ice type. In ...
    • Mass Cultivation of Microalgae: I. Experiences with Vertical Column Airlift Photobioreactors, Diatoms and CO2 Sequestration 

      Eilertsen, Hans Christian; Eriksen, Gunilla; Bergum, John-Steinar; Strømholt, Jo; Elvevoll, Edel O.; Eilertsen, Karl-Erik; Heimstad, Eldbjørg Sofie; Giæver, Ingeborg Hulda; Israelsen, Linn; Svenning, Jon Brage; Dalheim, Lars; Osvik, Renate Døving; Hansen, Espen Holst; Ingebrigtsen, Richard Andre; Aspen, Terje M; Wintervoll, Geir-Henning (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-17)
      From 2015 to 2021, we optimized mass cultivation of diatoms in our own developed vertical column airlift photobioreactors using natural and artificial light (LEDs). The project took place at the ferrosilicon producer Finnfjord AS in North Norway as a joint venture with UiT—The Arctic University of Norway. Small (0.1–6–14 m<sup>3</sup>) reactors were used for initial experiments and to produce inoculum ...
    • Effect of the T90-codend on the catch quality of cod (Gadus morhua) compared to the conventional codend configuration in the Barents Sea bottom trawl fishery 

      Jensen, Tonje Kristin; Brinkhof, Jesse; Lindberg, Stein-Kato; Tobiassen, Torbjørn Inge; Heia, Karsten; Olsen, Stein Harris; Larsen, Roger B.; Esaiassen, Margrethe (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-18)
      The aim of this study was to compare the catch quality of Northeast Atlantic cod (Gadus morhua) in the Barents Sea bottom trawl fishery caught using the conventional configuration (a sorting grid followed by a diamond mesh (T0) codend) and a T90° turned mesh codend (T90) without a grid. Twenty hauls were conducted, consisting of 10 hauls with the conventional configuration and 10 hauls with the ...
    • Smarte kontrakter kan hindre grønnvasking 

      Silkoset, Ragnhild; Nygaard, Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2021)
      Evnen til å spore produktinformasjon har vært mulig gjennom ulike teknologier i årtier. Bidraget i denne artikkelen er å utvikle forståelsen av hvordan smarte kontrakter gjennom blokkjedeteknologien kan være en informasjonsgarantist i markeder preget av informasjonsasymmetri. Informasjon om bærekraft er et eksempel på et problem knyttet til informasjonsasymmetri. Smarte kontrakter i kombinasjon med ...
    • A pioneering pest: the winter moth (Operophtera brumata) is expanding its outbreak range into Low Arctic shrub tundra 

      Vindstad, Ole Petter Laksforsmo; Jepsen, Jane Uhd; Molvig, Helge; Ims, Rolf Anker (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-01)
      Climate warming allows generalist boreal consumers to expand into Arctic ecosystems. We present experimental and observational field data showing that a generalist boreal insect pest—the winter moth (Operophtera brumata Linnaeus, 1758)—is expanding its outbreak range out of the northern boreal mountain birch forest in northeast Fennoscandia and into the adjacent Low Arctic shrub tundra. This is the ...