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  • Ultrastructural evidence for the participation of muscle cells in the formation of extracellular matrices in aporocotylid blood flukes (Digenea) 

    Poddubnaya, Larisa G.; Zhokhov, Alexander E.; Hemmingsen, Willy; Gibson, David I. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-05)
    The muscle cells and extracellular matrices (ECMs) of two teleost-infecting blood flukes belonging to distinct evolutionary lineages of the Aporocotylidae (Digenea) were examined using Transmission Electron Microscopy. Four morphotypes of muscle cells were found in the freshwater species Sanguinicola sp., but were considered to be various developmental stages of a single cisternic type. In the marine ...
  • Assessment of the risks to honey bees and biodiversity in Norway posed by the predatory wasp species Vespa velutina and V. mandarinia - Scientific Opinion of the Panel on Alien Organisms and Trade in Endangered species of the Norwegian Scientific Committee for Food and Enviroment 

    Eldegard, Katrine; Flø, Daniel; Kirkendall, Lawrence Richard; Malmstrøm, Martin; Nielsen, Anders; Rasmussen, Claus; de Boer, Hugo; Hindar, Kjetil; Järnegren, Johanna; Kausrud, Kyrre Linné; Rueness, Eli Knispel; Thorstad, Eva Bonsak; Velle, Gaute (Research report; Forskningsrapport, 2022-02-21)
    Med varmere klima er det mulig at asiatisk geithams (Vespa velutina) kan spre seg til Norge. Det er usannsynlig at japansk geithams (Vespa mandarina) vil spre seg til Norge.
  • Economic valuation of climate change impacts on ecotourism in Rekawa coastal wetland in Sri Lanka: Application of stated preference techniques 

    Salpage, Nesha Dushani (Doctoral thesis; Doktorgradsavhandling, 2022-06-02)
    <p>The research presented in this thesis has focused on the economic valuation of climate change impacts on ecotourism in a coastal wetland using three different methods of stated-preference techniques to provide answers to different research questions related to coastal tourism and climate change. Rekawa coastal wetland in Southern Sri Lanka was taken as the empirical context to examine the identified ...
  • Niches of marine mammals in the European Arctic 

    MacKenzie, Kirsteen M.; Lydersen, Christian; Haug, Tore; Routti, Heli Anna Irmeli; Aars, Jon; Andvik, Clare Margaret; Borgå, Katrine; Fisk, A.T.; Meier, Sonnich; Biuw, Martin; Lowther, Andrew; Lindstrøm, Ulf Ove; Kovacs, Kit M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-11)
    The Arctic is warming rapidly, with concomitant sea ice losses and ecosystem changes. The animals most vulnerable to Arctic food web changes are long-lived and slow-growing such as marine mammals, which may not be able to adapt rapidly enough to respond to changes in their resource bases. To determine the current extent and sources of these resource bases, we examined isotopic and trophic niches ...
  • Intra-season variations in distribution and abundance of humpback whales in the West Antarctic Peninsula using cruise vessels as opportunistic platforms 

    John Elling Deehr, Johannessen; Biuw, Martin; Lindstrøm, Ulf Ove; Ollus, Victoria Marja Sofia; Martín López, Lucía Martina; Gkikopoulou, Kalliopi C.; Oosthuizen, Wessel Chris; Lowther, Andrew (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-09)
    Fine-scale knowledge of spatiotemporal dynamics in cetacean distribution and abundance throughout the Western Antarctic Peninsula (WAP) is sparse yet essential for effective ecosystem-based management (EBM). Cruise vessels were used as platforms of opportunity to collect data on the distribution and abundance of humpback whales (Megaptera novaeangliae) during the austral summer of 2019/2020 in a ...
  • Dietary effects on biomarkers of growth, stress, and welfare of diploid and triploid Atlantic salmon (Salmo salar) during parr-smolt transformation 

    Bortoletti, Martina; Maccatrozzo, Lisa; Peruzzi, Stefano; Strand, Jo Espen Tau; Jobling, Malcolm; Radaelli, Giuseppe; Bertotto, Daniela (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-12)
    Triploidy is induced in Atlantic salmon (Salmo salar) to produce sterile fish for genetic containment and to hinder early sexual maturation in farmed fish, but it can have unwanted negative effects on growth, health, and welfare. However, the growth and welfare of triploid fish may be improved by adjusting the rearing environment, feeding conditions and diets. This study evaluated physiological ...
  • Growth performance, hepatic enzymes, and gut health status of common carp (Cyprinus carpio) in response to dietary Cetobacterium somerae fermentation product 

    Xie, Mingxu; Hao, Qiang; Olsen, Rolf Erik; Ringø, Einar; Yang, Yalin; Zhang, Zhen; Ran, Chao; Zhou, Zhigang (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-15)
    Intensive aquaculture practices compromise the health of fish. Probiotics especially those isolated from aquatic animals play important roles in improving fish health. The aim of the study was to evaluate the effects of stabilized fermentation product of Cetobacterium somerae (XMX-1) on the growth performance, gut and liver health of common carp. A total of 300 carps (initial weight of 2.32 ± 0.02 ...
  • Driving through dense fog: a study of the effects and control of sustainable public procurement of electric cars 

    Langseth, Marius; Moe, Helene Tronstad (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-21)
    Governments are large buyers of vehicles, thus contributing to pollution. To promote sustainability, policies have been shaped to replace government-owned fossil fuel cars with electric cars. Public procurement is seen as a strategic tool for the government to transition. This study identifies a research gap due to a lack of studies on how stakeholders at different levels identify and calculate the ...
  • Overview of the MOSAiC expedition: Snow and sea ice 

    Marcel, Nicolaus; Perovich, Donald; Spreen, Gunnar; Granskog, Mats; Divine, Dmitry; Gerland, Sebastian; Gradinger, Rolf Rudolf; Høyland, Knut Vilhelm; Salganik, Evgenii; Albedyll, Luisa von; Angelopoulos, Michael; Anhaus, Philipp; Arndt, Stefanie; Belter, H. Jakob; Bessonov, Vladimir; Birnbaum, Gerit; Brauchle, Jörg; Calmer, Radiance; Cardellach, Estel; Cheng, Bin; Clemens-Sewall, David; Dadic, Ruzica; Damm, Ellen; de Boer, Gijs; Demir, Oguz; Dethloff, Klaus; Fong, Allison A.; Fons, Steven; Frey, Markus M.; Fuchs, Niels; Gabarro, Carolina; Goessling, Helge F.; Haapala, Jari; Haas, Christian; Hamilton, Jonathan; Hannula, Henna-Reetta; Hendricks, Stefan; Herber, Andreas; Heuze´, Céline; Hoppmann, Mario; Huntemann, Marcus; Hutchings, Jennifer K.; Kaleschke, Lars; Katlein, Christian; Kolabutin, Nikolai; Krampe, Daniela; Savstrup Kristensen, Steen; Krumpen, Thomas; Kurtz, Nathan; Lampert, Astrid; Lange, Benjamin Allen; Lei, Ruibo; Light, Bonnie; Linhardt, Felix; Liston, Glen E.; Loose, Brice; Macfarlane, Amy R.; Mahmud, Mallik; Matero, Ilkka O.; Maus, Sönke; Morgenstern, Anne; Naderpour, Reza; Nandan, Vishnu; Niubom, Alexey; Oggier, Marc; Oppelt, Natascha; Pätzold, Falk; Perron, Christophe; Petrovsky, Tomasz; Pirazzini, Roberta; Polashenski, Chris; Rabe, Benjamin; Raphael, Ian A.; Regnery, Julia; Rex, Markus; Ricker, Robert; Riemann-Campe, Kathrin; Rinke, Annette; Rohde, Jan; Scharien, Randall K.; Schiller, Martin; Schneebeli, Martin; Semmling, Maximilian; Shimanchuk, Egor; Stroeve, Julienne; Thielke, Linda; Timofeeva, Anna; Tonboe, Rasmus Tage; Tavri, Aikterini; Tsamados, Michel; Wagner, David N.; Watkins, Daniel; Webster, Melinda; Wendisch, Manfred (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-07)
    Year-round observations of the physical snow and ice properties and processes that govern the ice pack evolution and its interaction with the atmosphere and the ocean were conducted during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition of the research vessel Polarstern in the Arctic Ocean from October 2019 to September 2020. This work was embedded ...
  • Disrupted seasonal biology impacts health, food security and ecosystems 

    Stevenson, Tyler J.; Visser, Marcel E.; Arnold, Walter; Barrett, Perry; Biello, Stephany M.; Dawson, Alistair G.; Denlinger, David L.; Dominoni, Davide M.; Ebling, Francis J.P.; Elton, Sarah; Evans, Neil; Ferguson, Heather M.; Foster, Russell G.; Hau, Michaela; Haydon, Daniel Thomas; Hazlerigg, David; Heideman, Paul D.; Hopcraft, John Grant C.; Jonsson, Nicholas N.; Kronfeld-Schor, Noga; Kumar, Vinod Anil; Lincoln, Gerald A.; Macleod, Ross; Martin, Samuel A.M.; Martinez-Bakker, Michaela E.; Nelson, Randy J.; Reed, Thomas E.; Robinson, Jane E.; Rock, Daniel Joseph E.; Schwartz, William J.; Steffan-Dewenter, Ingolf; Tauber, Eran; Thackeray, Stephen J.; Umstätter, Christina; Yoshimura, Takashi; Helm, Barbara (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-10-22)
    The rhythm of life on earth is shaped by seasonal changes in the environment. Plants and animals show profound annual cycles in physiology, health, morphology, behaviour and demography in response to environmental cues. Seasonal biology impacts ecosystems and agriculture, with consequences for humans and biodiversity. Human populations show robust annual rhythms in health and well-being, and the ...
  • Gene expression of lactobacilli in murine forestomach biofilms 

    Schwab, Clarissa; Tveit, Alexander Tøsdal; Schleper, Christa; Urich, Tim (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-04-04)
    Lactobacilli populate the gastro-intestinal tract of vertebrates, and are used in food fermentations and as probiotics. Lactobacilli are also major constituents of stable biofilms in the forestomach of rodents. In order to investigate the lifestyle of these biofilm lactobacilli in C57BL/6 mice, we applied metatranscriptomics to analyse gene expression (assessed by mRNA) and community composition ...
  • Shifting mirrors: adaptive changes in retinal reflections to winter darkness in Arctic reindeer 

    Stokkan, Karl-Arne; Folkow, Lars; Dukes, Juliet; Neveu, Magella; Hogg, Chris R; Siefken, Sandra Katharina Christiane; Dakin, Steven C; Jeffery, Glen (Journal article; Tidsskriftartikkel; Peer reviewed, 2013-12-22)
    Arctic reindeer experience extreme changes in environmental light from continuous summer daylight to continuous winter darkness. Here, we show that they may have a unique mechanism to cope with winter darkness by changing the wavelength reflection from their tapetum lucidum (TL). In summer, it is golden with most light reflected back directly through the retina, whereas in winter it is deep ...
  • 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, ...
  • Fish Skin and Gill Mucus: A Source of Metabolites for Non-Invasive Health Monitoring and Research 

    Ivanova, Lada; Rangel-Huerta, Oscar Daniel; Tartor, Haitham; Gjessing, Mona Cecilie; Dahle, Maria; Uhlig, Silvio (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-31)
    Mucous membranes such as the gill and skin mucosa in fish protect them against a multitude of environmental factors. At the same time, changes in the molecular composition of mucus may provide valuable information about the interaction of the fish with their environment, as well as their health and welfare. In this study, the metabolite profiles of the plasma, skin and gill mucus of freshwater ...
  • Robuste sjømatinntekter også under COVID-19 pandemien 

    Bertheussen, Bernt Arne (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-09)
    Norge er verdens nest største eksportør av sjømat. Inntektene skaper arbeid og aktivitet i lokalsamfunn langs hele kysten. Denne studien undersøker hvor sårbare inntektene til sjømatnæringen har vært under Covid-19 pandemien som har preget mesteparten av 2020 og hele 2021. I tillegg til å analysere inntektsutviklingen på aggregert nivå for fiskeri og havbruk, presenterer studien sektorvise analyser ...
  • Resemblance Reporting on Children: Sisters Are More Proactive than Brothers 

    Fisktjønmo, Guro Hole; Bårdsen, Bård-Jørgen; Folstad, Ivar (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-02)
    The asymmetric grandparental investment in humans may ultimately be explained by the paternity uncertainty hypothesis. The proximate mechanisms leading to grandparental bias in investment in grandchildren are, however, unclear. In a study of 233 males and females with an opposite sexed sibling, we examined whether comments on resemblance regarding one’s own child, or one’s sibling’s child, ...
  • Immobilization of muskoxen (Ovibos moschatus) with etorphine and xylazine 

    Blix, Arnoldus S; Lian, Hans; Ness, john (Journal article; Tidsskriftartikkel; Peer reviewed, 2011-06-27)
    One hundred and thirty three “wild” muskoxen, 81 of which of known body mass, were successfully immobilized using etorphine (M99), and xylazine (Rompun®), delivered by use of a dart gun. A dose of 0.05 mg/kg M99, supplemented by 0.15 mg/kg Rompun was found to be very effective. This dose is much higher than currently recommended e.g. by Handbook of Wildlife Chemical Immobilization.
  • Tundra vegetation ecology from the sky - Aerial images and photogrammetry as tools to monitor landscape change 

    Eischeid, Isabell (Doctoral thesis; Doktorgradsavhandling, 2022-05-24)
    Long-term temperature increases, higher frequencies of extreme weather events and changes in food web structures will all affect the state of Arctic tundra ecosystems at different temporal and spatial scales. Ecologists are tasked with understanding these biotic and abiotic interactions and finding methods to measure them. This thesis applies new technology and methods within the principles of ...
  • Upregulation of tryptophanyl-tRNA synthethase adapts human cancer cells to nutritional stress caused by tryptophan degradation 

    Adam, Isabell; Dewi, Dyah L.; Mooiweer, Joram; Sadik, Ahmed; Mohapatra, Soumya R.; Berdel, Bianca; Keil, Melanie; Sonner, Jana K.; Thedieck, Kathrin; Rose, Adam J.; Platten, Michael; Heiland, Ines; Trump, Saskia; Opitz, Christiane A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-05)
    Tryptophan (Trp) metabolism is an important target in immuno-oncology as it represents a powerful immunosuppressive mechanism hijacked by tumors for protection against immune destruction. However, it remains unclear how tumor cells can proliferate while degrading the essential amino acid Trp. Trp is incorporated into proteins after it is attached to its tRNA by tryptophanyl-tRNA synthestases. As ...
  • Herbivore Effects on Ecosystem Process Rates in a Low-Productive System 

    Tuomi, Maria Wilhelmina; Stark, Sari; Hoset, Katrine Skamfer; Väisänen, Maria; Oksanen, Lauri; Murguzur, Francisco Javier Ancin; Tuomisto, Hanna; Dahlgren, Jonas; Bråthen, Kari Anne (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-17)
    Mammalian herbivores shape the structure and function of many nutrient-limited or low-productive terrestrial ecosystems through modification of plant communities and plant–soil feedbacks. In the tundra biome, mammalian herbivores may both accelerate and decelerate plant biomass growth, microbial activity and nutrient cycling, that is, ecosystem process rates. Selective foraging and associated ...

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