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  • Probiotic dosing of ruminococcus flavefaciens affects rumen microbiome structure and function in reindeer 

    Præsteng, Kirsti; Pope, Phillip B.; Cann, Isaac K. O.; Mackie, Roderick I.; Mathiesen, Svein Dish; Folkow, Lars P.; Eijsink, Vincent G. H.; Sundset, Monica Alterskjær (Journal article; Tidsskriftartikkel; Peer reviewed, 2013-08-20)
    Highly cellulolytic bacterial species such as <i>Ruminococcus flavefaciens</i> are regarded essential for the microbial breakdown of cellulose in the rumen. We have investigated the effect of ruminal dosing of <i>R. flavefaciens</i> strain 8/94-32 during realimentation of starved reindeer (males, n = 3). Microbiome function measured as in situ digestion of cellulose and food pellets (percent DMD; ...
  • 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 ...
  • Can morphology reliably distinguish between the copepods Calanus finmarchicus and C. glacialis, or is DNA the only way? 

    Choquet, Marvin; Kosobokova, Ksenia; Kwaśniewski, Sławomir; Hatlebakk, Maja Karoline Viddal; Dhanasiri, Anusha Krishanthi Shyama; Melle, Webjørn Raunsgård; Daase, Malin; Svensen, Camilla; Søreide, Janne; Hoarau, Galice Guillaume (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-10)
    Copepods of the genus <i>Calanus</i> play a key role in marine food webs as consumers of primary producers and as prey for many commercially important marine species. Within the genus, <i>Calanus glacialis</i> and <i>Calanus finmarchicus</i> are considered indicator species for Arctic and Atlantic waters, respectively, and changes in their distributions are frequently used as a tool to track climate ...
  • ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO2, water, and energy fluxes on daily to annual scales 

    Qiu, Chunjing; Zhu, Dan; Ciais, Philippe; Guenet, Bertrand; Krinner, Gerhard; Peng, Shushi; Aurela, Mika; Bernhofer, Christian; Brümmer, Christian; Bret-Harte, Syndonia; Chu, Housen; Chen, Jiquan; Desai, Ankur R.; Dušek, Jiří; Euskirchen, Eugénie S.; Fortuniak, Krzysztof; Flanagan, Lawrence B.; Friborg, Thomas; Grygoruk, Mateusz; Gogo, Sébastien; Grünwald, Thomas; Hansen, Birger U.; Holl, David; Humphreys, Elyn; Hurkuck, Miriam; Kiely, Gerard; Klatt, Janina; Kutzbach, Lars; Largeron, Chloé; Laggoun-Défarge, Fatima; Lund, Magnus; Lafleur, Peter M.; Li, Xuefei; Mammarella, Ivan; Merbold, Lutz; Nilsson, Mats B.; Olejnik, Janusz; Ottosson-Löfvenius, Mikaell; Oechel, Walter C.; Parmentier, Frans-Jan W.; Peichl, Matthias; Pirk, Norbert; Peltola, Olli; Pawlak, Włodzimierz; Rasse, Daniel; Rinne, Janne; Shaver, Gaius R.; Schmid, Hans Peter; Sottocornola, Matteo; Steinbrecher, Rainer; Sachs, Torsten; Urbaniak, Marek; Zona, Donatella; Ziemblinska, Klaudia (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-05)
    Peatlands store substantial amounts of carbon and are vulnerable to climate change. We present a modified version of the Organising Carbon and Hydrology In Dynamic Ecosystems (ORCHIDEE) land surface model for simulating the hydrology, surface energy, and CO<sub>2</sub> fluxes of peatlands on daily to annual timescales. The model includes a separate soil tile in each 0.5° grid cell, defined from a ...
  • Marine depth use of sea trout Salmo trutta in fjord areas of Central Norway 

    Eldøy, Sindre Håvarstein; Davidsen, Jan Grimsrud; Thorstad, Eva Bonsak; Whoriskey, Frederick G.; Aarestrup, Kim; Næsje, Tor; Rønning, Lars; Sjursen, Aslak Darre; Rikardsen, Audun H.; Arnekleiv, Jo Vegar (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-09-15)
    The vertical behaviour of 44 veteran sea trout <i>Salmo trutta</i> (275–580 mm) in different marine fjord habitats (estuary, pelagic, near shore with and without steep cliffs) was documented during May–February by acoustic telemetry. The swimming depth of <i>S. trutta</i> was influenced by habitat, time of day (day v. night), season, seawater temperature and the body length at the time of tagging. ...
  • Effects of water level regulation in alpine hydropower reservoirs: an ecosystem perspective with a special emphasis on fish 

    Hirsch, Philipp E.; Eloranta, Antti; Amundsen, Per-Arne; Brabrand, Åge; Charmasson, Julie; Helland, Ingeborg Palm; Power, Michael John; Sanchez-Hernandez, Javier; Sandlund, Odd Terje; Sauterleute, Julian Friedrich; Skoglund, Sigrid Østrem; Ugedal, Ola; Yang, Hong (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-02-04)
    Sustainable development of hydropower demands a holistic view of potential impacts of water level regulation (WLR) on reservoir ecosystems. Most environmental studies of hydropower have focused on rivers, whereas environmental effects of hydropower operations on reservoirs are less well understood. Here, we synthesize knowledge on how WLR from hydropower affects alpine lake ecosystems and highlight ...
  • Scientific opinion on chronic wasting disease (II) 

    Ricci, A.; Allende, A; Bolton, D.; Chemaly, M; Davies, R; Fernández Escámez, P.S.; Gironés, R.; Herman, L; Koutsoumanis, Kostas; Lindqvist, R; Nørrung, Birgit; Robertson, L; Ru, Giuseppe; Sanaa, Moez; Skandamis, Panagiotis; Snary, Emma; Speybroeck, Niko; Kuile, B.T.; Threlfall, John; Wahlström, Helene; Benestad, Sylvie; Gavier-Widen, D; Miller, M.W.; Telling, G.C.; Tryland, Morten; Latronico, Francesca; Ortiz-Pelaez, A; Stella, P; Simmons, Marion (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-17)
    The European Commission asked EFSA for a scientific opinion on chronic wasting disease in two parts. Part one, on surveillance, animal health risk‐based measures and public health risks, was published in January 2017. This opinion (part two) addresses the remaining Terms of Reference, namely, ‘are the conclusions and recommendations in the EFSA opinion of June 2004 on diagnostic methods for chronic ...
  • Area protection may reduce salmon louse infection risk to wild salmonids 

    Bjørn, Pål Arne; Sivertsgård, Rolf; Finstad, Bengt; Nilsen, Rune; Serra-Llinares, Rosa Maria; Kristoffersen, Roar (Journal article; Tidsskriftartikkel; Peer reviewed, 2011-05-30)
    ABSTRACT: Salmon louse <i>Lepeophtheirus salmonis</i> Krøyer infection levels in both wild sea trout <i>Salmo trutta</i> L. and sentinel Atlantic salmon <i>Salmo salar</i> L. smolts were investigated inside and outside a temporary protected zone with limits on fish farming in the intensively farmed Romsdalsfjord system. Wild sea trout outside the protected zone had higher prevalence and significantly ...
  • Growth and development of skeletal anomalies in diploid and triploid Atlantic salmon (Salmo salar) fed phosphorus-rich diets with fish meal and hydrolyzed fish protein 

    Peruzzi, Stefano; Puvanendran, Velmurugu; Riesen, Guido; Ripman Seim, Rudi; Hagen, Ørjan; Martínez-Llorens, Silvia; Falk-Petersen, Inger-Britt; Fernandes, Jorge Manuel de Oliveira; Jobling, Malcolm (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-22)
    Diploid and triploid Atlantic salmon, <i>Salmo salar</i> were fed high-protein, phosphorus-rich diets (56–60% protein; ca 18g phosphorus kg<sup>-1</sup> diet) whilst being reared at low temperature from start-feeding until parr-smolt transformation. Performances of salmon fed diets based on fish meal (STD) or a mix of fishmeal and hydrolysed fish proteins (HFM) as the major protein sources were ...
  • The distribution of the fathead sculpin species Cottunculus subspinosus Jensen, 1902 

    Byrkjedal, Ingvar; Langhelle, Gunnar; Christiansen, Jørgen Schou; Karamushko, Oleg V. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-13)
    The range of the rarely caught fathead sculpin species <i>Cottunculus subspinosus</i> has been considered restricted to the waters off East Greenland and Northeast Iceland. For the first time the species is recorded from the east side of the Norwegian Sea, and also it is found further north in the Greenland Sea than previously known. Mapping all the corroborated specimens known indicates that the ...
  • Temporally stable population-specific differences in run timing of one-sea-winter Atlantic salmon returning to a large river system 

    Vähä, Juha-Pekka; Erkinaro, Jaakko; Niemelä, Eero; Primmer, Craig R.; Saloniemi, Irma; Johansen, Morten; Svenning, Martin; Brørs, Sturla (Journal article; Tidsskriftartikkel; Peer reviewed, 2010-12-06)
    The understanding of migration patterns can significantly contribute to conservation and management. The spawning migrations of Atlantic salmon (<i>Salmo salar</i>) cover thousands of kilometers from the feeding areas at sea to their natal rivers to reproduce. Migrating salmon are exposed to intensive harvest, but little is known of the population‐specific differences in migration behavior. In this ...
  • Inter-laboratory testing of the effect of DNA blocking reagent G2 on DNA extraction from low-biomass clay samples 

    Jacobsen, Carsten Suhr; Nielsen, Tue Kjærgaard; Vester, Jan Kjølhede; Stougaard, Peter; Nielsen, Jeppe Lund; Voriskova, Jana; Winding, Anne; Baldrian, Petr; Liu, Binbin; Frostegård, Åsa; Pedersen, Dorthe; Tveit, Alexander Tøsdal; Svenning, Mette Marianne; Tebbe, Christoph C.; Øvreås, Lise; Jakobsen, Pia Bach; Blazewicz, Steven J.; Hubablek, Valerie; Bertilsson, Stefan; Hansen, Lars Hestbjerg; Cary, S. Craig; Holben, William E.; Ekelund, Flemming; Bælum, Jacob (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-09)
    Here we show that a commercial blocking reagent (G2) based on modified eukaryotic DNA significantly improved DNA extraction efficiency. We subjected G2 to an inter-laboratory testing, where DNA was extracted from the same clay subsoil using the same batch of kits. The inter-laboratory extraction campaign revealed large variation among the participating laboratories, but the reagent increased the ...
  • Size at maturity and molting probability across latitude in female Cancer pagurus 

    Bakke, Snorre; Larssen, Wenche Merete Emblem; Woll, Astrid Kari; Søvik, Guldborg; Gundersen, Agnes Christine; Hvingel, Carsten; Nilssen, Einar Magnus (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-11)
    Edible crab, <i>Cancer pagurus</i>, is a valuable North Atlantic fishery resource distributed from Morocco to northern Norway, covering a wide range of temperatures and other oceanographic variables. Knowledge on how local environmental conditions affect life history traits like maturity and growth in this species is however lacking, despite its importance in science-based management. Through analyses ...
  • Temporal variability in surface water pCO2 in Adventfjorden (West Spitsbergen) with emphasis on physical and biogeochemical drivers 

    Ericson, Ylva; Falck, Eva; Chierici, Melissa; Fransson, Agneta; Kristiansen, Svein; Platt, Stephen Matthew; Hermansen, Ove; Myhre, Cathrine Lund (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-26)
    Seasonal and interannual variability in surface water partial pressure of CO<sub>2</sub> (<i>p</i>CO2) and air‐sea CO<sub>2</sub> fluxes from a West Spitsbergen fjord (IsA Station, Adventfjorden) are presented, and the associated driving forces are evaluated. Marine CO<sub>2</sub> system data together with temperature, salinity, and nutrients, were collected at the IsA Station between March 2015 and ...
  • Mandibular shape in farmed Arctic foxes (Vulpes lagopus) exposed to persistent organic pollutants 

    Bradley, Madison M.; Perra, Megan; Ahlstrøm, Øystein; Jenssen, Bjørn Munro; Jørgensen, Even Hjalmar; Fuglei, Eva; Muir, Derek C.G.; Sonne, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-07-26)
    We investigated if dietary exposure to persistent organic pollutants (POPs) affect mandibular asymmetry and periodontal disease in paired male-siblings of Arctic foxes (<i>Vulpes lagopus</i>). During ontogeny, one group of siblings was exposed to the complexed POP mixture in naturally contaminated minke whale (<i>Balaenoptere acutorostarta</i>) blubber (n = 10), while another group was given wet ...
  • The serostatus of Brucella spp., Chlamydia abortus, Coxiella burnetii and Neospora caninum in cattle in three cantons in Bosnia and Herzegovina 

    Softic, Adis; Asmare, Kassahun; Granquist, Erik Georg; Godfroid, Jacques; Fejzic, Nihad; Skjerve, Eystein (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-02)
    Dairy production in Bosnia and Herzegovina exhibits limited productivity, which may partly, be explained by extensive reproductive problems of non-infectious and infectious origin. Brucella spp., Chlamydia abortus, Coxiella burnetii and Neospora caninum are common infectious causes of decreased reproductive outcomes in cattle worldwide. Little is, however, known about the disease status of herds ...
  • New Species of Saprobic Labyrinthulea (=Labyrinthulomycota) and the Erection of a gen. nov. to Resolve Molecular Polyphyly within the Aplanochytrids 

    Hassett, Brandon Thomas; Gradinger, Rolf (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-12-19)
    A culture of a unicellular heterotrophic eukaryote was established from pollen‐baited seawater acquired from the nearshore environment in Tromsø, Norway. Light microscopy revealed the production of ectoplasmic nets and reproduction by biflagellated zoospores, as well as binary division. After culturing and subsequent nucleotide extraction, database queries of the isolate's 18S small ribosomal subunit ...
  • Stay or go – how topographic complexity influences alpine plant population and community responses to climate change 

    Graae, Bente Jessen; Vandvik, Vigdis; Armbruster, W. Scott; Eiserhardt, Wolf L.; Svenning, Jens-Christian; Hylander, Kristoffer; Ehrlén, Johan; Speed, James D.M.; Klanderud, Kari; Bråthen, Kari Anne; Milbau, Ann; Opedal, Øystein Hjorthol; Alsos, Inger G.; Ejrnæs, Rasmus; Bruun, Hans Henrik; Birks, H. John B.; Westergaard, Kristine Bakke; Birks, Hilary H; Lenoir, Jonathan (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-11)
    In the face of climate change, populations have two survival options − they can remain in situ and tolerate the new climatic conditions (“stay”), or they can move to track their climatic niches (“go”). For sessile and small-stature organisms like alpine plants, staying requires broad climatic tolerances, realized niche shifts due to changing biotic interactions, acclimation through plasticity, or ...
  • Use of an Autonomous Surface Vehicle reveals small-scale diel vertical migrations of zooplankton and susceptibility to light pollution under low solar irradiance 

    Ludvigsen, Martin; Berge, Jørgen; Geoffroy, Maxime; Cohen, Jonathan H.; De La Torre, Pedro R.; Nornes, Stein Melvær; Singh, Hanumant; Sørensen, Asgeir Johan; Daase, Malin; Johnsen, Geir (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-10)
    Light is a major cue for nearly all life on Earth. However, most of our knowledge concerning the importance of light is based on organisms’ response to light during daytime, including the dusk and dawn phase. When it is dark, light is most often considered as pollution, with increasing appreciation of its negative ecological effects. Using an Autonomous Surface Vehicle fitted with a hyperspectral ...
  • Histopathological characterisation of retinal lesions associated to Diplostomum species (Platyhelminthes: Trematoda) infection in polymorphic Arctic charr Salvelinus alpinus 

    Padros, Francesc; Knudsen, Rune; Blasco-Costa, Isabel (Journal article; Tidsskriftartikkel; Peer reviewed, 2018)
    The eye represents an immune privileged organ where parasites can escape host reactions. This study provides the first systematic evidence of the pathology associated with <i>Diplostomum</i> sp. infection in the eye retina of fish (i.e. Arctic charr). Histological sections showed that the trematodes caused mechanical disengagement between the retinal pigmentary epithelium and the neurosensory retina, ...

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