Recent additions

  • Sea ice as habitat for microalgae, bacteria, virus, fungi, meio- and macrofauna: A review of an extreme environment 

    Lund-Hansen, Lars Chresten; Gradinger, Rolf Rudolf; Hassett, Brandon; Jayasinghe, Sahan; Kennedy, Fraser; Martin, Andrew; McMinn, Andrew; Søgaard, Dorte H.; Sorrell, Brian K. (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-08-30)
    The novel concept of the review is a focus on the organisms living in the sea ice and what mechanisms they have developed for their existence. The review describes the physical environment of the sea ice and the microorganisms living there as microalgae, bacteria, virus, fungi, meio- and macrofauna where they inhabit the brine channels and exposed to low temperatures as down to −25 °C and high ...
  • Tanycytes from a bird’s eye view: gene expression profiling of the tanycytic region under different seasonal states in the Svalbard ptarmigan 

    Appenroth, Daniel; West, Alexander Christopher; Wood, Shona Hiedi; Hazlerigg, David Grey (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-09-20)
    In mammals and birds, tanycytes are known to regulate thyroid hormone conversion, and this process is central to the control of seasonal reproduction. In mammals, this cell type is also implicated in retinoic acid signalling, neurogenesis, and nutritional gatekeeping, all of which have been linked to hypothalamic regulation of energy metabolism. Less is known about these potential wider roles of ...
  • Clocks at a snail pace: biological rhythms in terrestrial gastropods 

    Salvador, Rodrigo Brincalepe; Mizumo Tomotani, Barbara (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-10-29)
    Biological rhythms are ubiquitous across the tree of life. Organisms must allocate their activities into moments of the day and of the season that will increase their probability of surviving and reproducing, which is done in the form of daily and annual rhythms. So far, the vast majority of studies on biological rhythms have focused on classical laboratory model species. Still, the use of ...
  • Snøkrabbe på norsk sokkel i Barentshavet - Status og rådgivning for 2025 

    Hjelset, Ann Merete; Danielsen, Hanna Ellerine Helle; Jenssen, Maria; Humborstad, Odd Børre; Anders, Neil; Saltskår, Jostein; Berg, Erik; Zimmermann, Fabian (Research report; Forskningsrapport, 2024-10-24)
    Basert på en MSY-tilnærming anbefaler Havforskningsinstituttet at totalfangsten av snøkrabbe på norsk sokkel i 2025 ikke bør overstige 12 724 tonn. Kvoterådet gjelder for den høstbare delen av bestanden, som er snøkrabbe over minstemålet på 95 mm skallbredde.
  • Capture and Release of Minke Whales Offers New Research Opportunities, Including Measurements of Mysticete Hearing 

    Kleivane, Lars; Kvadsheim, Petter Helgevold; Vinje, Anna Victoria Pyne; Mulsow, Jason; Ølberg, Rolf-Arne; Teilmann, Jonas; Harms, Craig; Houser, Dorian (Journal article; Tidsskriftartikkel; Peer reviewed, 2024)
    Knowledge about species-specific hearing is vital to assessing how anthropogenic noise impacts marine mammals. Unfortunately, no empirical audiogram exists for any mysticete whale. We therefore developed a catch-and-release method to assess hearing in a small mysticete, the minke whale (Balaenoptera acutorostrata). Stationary lead nets were placed to intercept migratory routes and direct the whales ...
  • Strongly asymmetric interactions and control regimes in the Barents Sea: a topological food web analysis 

    Jordán, Ferenc; Capelli, Greta; Primicerio, Raul; Bodini, Antonio (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-22)
    Introduction: Increasing temperature of the global ocean alters the spatial behavior of a number of species. From the northern Atlantic Ocean, species may shift their area towards the poles. This results in the atlantification of the Barents Sea, raising questions about possible changes in species composition, community structure and community control.<p> <p>Methods: We address the question ...
  • Fine-scale diet data reveal spatial variation in predator–prey interactions in Norwegian fjords 

    Tengvall, Jessica; Søvik, Guldborg; Enberg, Katja; Lindstrøm, Ulf Ove; Strand, Mette; Pedersen, Torstein; Strand, Hans Kristian; Zimmermann, Fabian (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-13)
    <ol> <li>Predator–prey interactions in time and space determine stock productivity, making them an important consideration when managing marine resources, rebuilding stocks or considering reopening a fishery.</li><p> <li> We analysed fine-scale diet data from surveys conducted in 2009–2010 and 2018–2019 in three fjords in northern Norway with geostatistical models investigating how predation varied ...
  • Circadian coupling of mitochondria in a deep-diving mammal 

    Ciccone, Chiara; Kante, Fayiri; Folkow, Lars; Hazlerigg, David Grey; West, Alexander Christopher; Wood, Shona Hiedi (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-08)
    Regulation of mitochondrial oxidative phosphorylation is essential to match energy supply to changing cellular energy demands, and to cope with periods of hypoxia. Recent work implicates the circadian molecular clock in control of mitochondrial function and hypoxia sensing. Because diving mammals experience intermittent episodes of severe hypoxia, with diel patterning in dive depth and duration, ...
  • Does long-term grazing cause cascading impacts on the soil microbiome in mountain birch forests? 

    Ahonen, Saija H.K.; Ruotsalainen, Anna Liisa; Wäli, Piippa R.; Suominen, Otso; Vindstad, Ole Petter Laksforsmo; Jepsen, Jane Uhd; Markkola, Annamari (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-01)
    In subarctic mountain birch forests, reindeer grazing and moth outbreaks act as important biotic drivers of ecosystem functioning. We investigated how a long-term contrast in reindeer grazing regimes and short-term ungulate exclusion affected soil fungal and bacterial communities in mountain birch forests recovering from a recent moth outbreak. We separately described the impacts on microbial ...
  • Descriptive analyses of knowledge, attitudes, and practices regarding rabies transmission and prevention in rural communities near wildlife reserves in Uganda: a One Health cross-sectional study 

    Atuheire, Collins G. K.; Okwee-Acai, James; Taremwa, Martha; Terence, Odoch; Ssali, Sarah N.; Mwiine, Frank N.; Kankya, Clovice; Skjerve, Eystein; Tryland, Morten (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-19)
    Background Despite urban (domestic dog) rabies cycles being the main target for rabies elimination by 2030, syl‑ vatic (wildlife) rabies cycles can act as rabies spillovers especially in settlements contiguous to wildlife reserves. Rural communities next to wildlife reserves are characterized by unique socio-demographic and cultural practices includ‑ ing bat consumption, hunting for bushmeat, and ...
  • Shifting invertebrate distributions in the Barents Sea since pre-1900 

    Calvet, Nathalie; Bluhm, Bodil Annikki Ulla Barbro; Yoccoz, Nigel Gilles; Altenburger, Andreas (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-08-23)
    Marine invertebrate habitats are experiencing warming, and oceanic carbon dioxide levels are on the rise. These changes result in shifts in species distributions. Monitoring and understanding these shifts provides vital information because each species plays a unique ecological role, and the human utilization of marine species is intrinsically linked to their geographic locations. Here, we ...
  • c-fos induction in the choroid plexus, tanycytes and pars tuberalis is an early indicator of spontaneous arousal from torpor in a deep hibernator 

    Markussen, Fredrik Andreas Fasth; Cázarez-Márquez, Fernando; Melum, Vebjørn Jacobsen; Hazlerigg, David Grey; Wood, Shona Hiedi (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-23)
    Hibernation is an extreme state of seasonal energy conservation, reducing metabolic rate to as little as 1% of the active state. During the hibernation season, many species of hibernating mammals cycle repeatedly between the active (aroused) and hibernating (torpid) states (T–A cycling), using brown adipose tissue (BAT) to drive cyclical rewarming. The regulatory mechanisms controlling this process ...
  • Hypothalamic tanycytes as mediators of maternally programmed seasonal plasticity 

    Melum, Vebjørn Jacobsen; Sáenz de Miera, Cristina; Markussen, Fredrik Andreas Fasth; Cazarez Marquez, Fernando; Jaeger, Catherine; Sandve, Simen Rød; Simonneaux, Valérie; Hazlerigg, David Grey; Wood, Shona Hiedi (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-12)
    In mammals, maternal photoperiodic programming (MPP) provides a means whereby juvenile development can be matched to forthcoming seasonal environmental conditions.<sup>1–4</sup> This phenomenon is driven by in utero effects of maternal melatonin<sup>5–7</sup> on the production of thyrotropin (TSH) in the fetal pars tuberalis (PT) and consequent TSH receptor-mediated effects on tanycytes lining ...
  • Biophysical characterization of summer Arctic sea-ice habitats using a remotely operated vehicle-mounted underwater hyperspectral imager 

    Lange, Benjamin Allen; Matero, Ilkka O.; Salganik, Evgenii; Campbell, Karley Lynn; Katlein, Christian; Anhaus, Philipp; Osanen, Janina Emilia; Granskog, Mats (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-08)
    The impact of a rapidly shifting sea-ice cover on climate, ecosystem processes and biophysical habitat properties is not yet fully understood, particularly in the central Arctic Ocean, due to a lack of spatially representative observations. From June to July 2020 during the year-long Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC, leg 4) in the Transpolar Drift, we ...
  • Parasitic dodder expresses an arsenal of secreted cellulases with multi-substrate specificity during host invasion 

    Edema, Hilary; Bawin, Thomas Georges A; Olsen, Stian; Krause, Kirsten; Karppinen, Katja Hannele (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-17)
    Cuscuta campestris is a common and problematic parasitic plant which relies on haustoria to connect to and siphon nutrients from host plants. Glycoside hydrolase family 9 (GH9) cellulases (EC 3.2.1.4) play critical roles in plant cell wall biosynthesis and disassembly, but their roles during Cuscuta host invasion remains underexplored. In this study, we identified 22 full-length GH9 cellulase ...
  • Management strategy evaluation for northern shrimp in the Barents Sea (ICES subareas 1 and 2) 

    Trochta, John Tyler; Stesko, Aleksei; Olssøn, Ragni; Danielsen, Hanna Ellerine Helle; Jenssen, Maria; Zimmermann, Fabian (Research report; Forskningsrapport, 2024-09-02)
    To establish a management plan for northern shrimp (Pandalus borealis) in the Barents Sea, the Norwegian-Russian Fisheries Commission requested in 2023 a proposal for a harvest control rule (HCR). Based on discussions with stakeholders, six different HCRs were defined and evaluated against three performance criteria: 1. precautionarity (less than 5% risk of falling below limit reference point for ...
  • Zooplankton fecal pellet flux drives the biological carbon pump during the winter–spring transition in a high-Arctic system 

    Darnis, Gérald; Geoffroy, Maxime; Daase, Malin Hildegard Elisabeth; Lalande, Catherine; Søreide, Janne; Leu, Eva; Renaud, Paul Eric; Berge, Jørgen (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-06-24)
    Recent research highlighted significant marine biological activity during the Arctic winter, with poorly known implications for the biological carbon pump. We used moored instruments to (1) track the development of the pelagic food web of a high-Arctic marine ecosystem from winter to spring, and (2) assess the role of zooplanktonmediated processes in the sinking export of particulate organic carbon ...
  • Environmental drivers of food webs in charr and trout-dominated cold-water lakes 

    Kangosjärvi, Henna; Amundsen, Per-Arne; Byström, Pär; Finstad, Anders Gravbrøt; Power, Michael John; Sánchez-Hernández, Javier; Eloranta, Antti (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-15)
    Cold-water lakes situated in high latitudes and altitudes have pivotal socio-ecological importance both globally and locally. However, they are increasingly threatened by multiple anthropogenic stressors, such as climate change, hydropower and invasive species. The development of efficient management strategies is therefore urgently needed and requires a comprehensive understanding of the factors ...
  • Calibration verification of an underwater hyperspectral imaging push broom instrument to measure light in absolute units and field demonstration 

    Schartmüller, Bernhard; McKee, David; Berge, Jørgen; Johnsen, Geir (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-09-16)
    The push broom design of an underwater hyperspectral imaging (UHI) instrument makes it possible to measure angle-resolved spectral radiance L(λ)in a plane. We describe the characterization of a commercial UHI instrument (UHI-4, Ecotone AS, Norway) and the spectral, geometric, and radiometric calibration transfer for measuring L(λ) in absolute units [µW cm<sup>−2</sup> nm<sup>−1</sup> sr<sup>−1</sup> ]. ...
  • Ecosystem risk from human use of ocean space and resources: a case study from the Norwegian coast 

    Aarflot, Johanna Myrseth; Bjørdal, Vilde Regine; Dunlop, Katherine Mary; Espinasse, Marina; Husson, Berengere; Lindstrøm, Ulf Ove; Keulder-Stenevik, Felicia Juanita; Ono, Kotaro; Siwertsson, Anna; Skern-Mauritzen, Mette (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-30)
    Coastal and adjacent shelf waters are generally highly productive ecosystems harboring important ecological processes and exposed to a range of anthropogenic pressures from land-based and marine sectors. Ensuring that the cumulative pressures from human activities do not cause unacceptable, permanent harm to the ecosystem is challenging but crucial for sustainable management of these regions. ...

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