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  • Uncovering the secrets they keep – the role of parasites in food web ecology 

    Moore, Shannon Elizabeth (Master thesis; Mastergradsoppgave, 2022-06-01)
    Interactions involving parasites often account for large proportions of links within aquatic food webs, yet few studies integrate parasites into their food web analyses. This analysis compares three sets of highly resolved food webs that differ in taxa composition, space, and time for a subarctic lake system. Key topological food web metrics, including connectance, linkage density, and mean generality ...
  • Molecular study of digenean diversity in aquatic organisms in northern Norway, with a focus on the seasonality of Crepidostomum [Braun, 1900] 

    Slåteng, Sigurd (Master thesis; Mastergradsoppgave, 2022-06-07)
    This study aimed to elucidate cryptic trematode diversity across multiple life stages in aquatic organisms. I collected samples from first intermediate hosts (bivalves), second intermediate hosts (amphipods and insect nymphs), and definitive hosts (fish), and identified them by use of molecular methods. Phylograms based on molecular markers from 28S and COI genes were used to identify nine species ...
  • The structure of nasal conchae in Svalbard rock ptarmigan (Lagopus muta hyperborea) with comparisons to three other Galliform birds 

    Westvik, Marie Aas (Master thesis; Mastergradsoppgave, 2022-05-27)
    Birds are endothermic homeotherms that regulate internal metabolic heat production to keep a stable body core temperature. Lung ventilation, which is required to obtain oxygen for metabolism, is potentially a large source for heat and water loss. In a polar habitat with low year-round temperatures and scarcity of food in the winter, conservation of heat and water is crucial for survival of the ...
  • Validating the Tritiated Water Method in Adult Harp Seal 

    Sørli, Bernhard Jakob Salen (Master thesis; Mastergradsoppgave, 2022-05-16)
    As one of the top predators in the northeast Atlantic, and most numerous, the harp seal (Pagophilus groenlandicus), has a significant role in the higher trophic levels in the ecosystem. Their condition can be an indicator of changes in prey availability, competition with other species or even climate. It can also be a useful tool in predicting the pup production and breeding success. The ...
  • Dive behaviour and respiration rates of humpback whales (Megaptera Novaeangliae) during foraging off Northern Norway, with implications for metabolic rate estimates 

    Gunnufsen, Rikke (Master thesis; Mastergradsoppgave, 2022-05-16)
    Knowing the metabolic rate of marine mammals is often important as baseline knowledge of their biology and physiology, e.g., to allow ecosystem assessments and estimation of their resource needs and use, and prey requirements. However, our current knowledge of energetics of large cetaceans is limited compared to many smaller cetaceans. Determining the energy expenditure of large free-ranging whales ...
  • Marine growth of introduced pink salmon (Oncorhynchus gorbuscha) caught in northern and central Norway 

    Paulsen, Tora (Master thesis; Mastergradsoppgave, 2022-05-16)
    The introduction of pink salmon in the White Sea area during the second half of the 20th century has resulted in the establishment of a self-sustaining population of pink salmon in rivers draining to the Barents Sea and North Atlantic Ocean. The size and abundance of pink salmon is dependent on survival during the marine phase, where they acquire more than 95% of their body weight. Investigating ...
  • Exploring the potential of an online platform for citizen science-based ecological monitoring of plant- and wildlife on the high-Arctic Archipelago Svalbard 

    Bruholt, Linn (Master thesis; Mastergradsoppgave, 2022-05-16)
    Citizen science is increasingly used to include in ecological monitoring over the past three decades. Web-based applications or smart phones enable citizens to record observations or experiences at larger temporal and spatial scale and provide opportunities for a larger number of citizens to participate in mapping observations. Citizen science can also be used to record, or map observed and experienced ...
  • Bærekraft i oppdrettskonsepter: Hva er bærekraftig oppdrett og hvor bærekraftig er ulike oppdrettskonspeter? 

    Emblem-Lund, Henrik (Master thesis; Mastergradsoppgave, 2022-05-16)
    Vekst i norsk lakseoppdrett har ført til et økende fokus på bærekraft, etterfulgt av en oppgang i utvikling av nye oppdrettskonsepter for å løse utfordringene dagens næring står ovenfor. En tydelig forståelse i definisjon og operasjonalisering av bærekraft er avgjørende for riktig veivalg fremover. En forståelse som vil gjøre vurderinger og valg av ulike oppdrettskonsepter i et bærekraftaspekt enklere ...
  • Seabed minerals in Norway. An analysis of conflicts and sustainability issues. 

    Skancke, Ida Seljevoll (Master thesis; Mastergradsoppgave, 2022-05-16)
    The increasing demand for metals for use in renewable technologies and electronics has led to a surge in the interest in the minerals found on the seabed. The demand is driven by the need for green technologies to reach climate goals, population growth, and environmental, social, and economic challenges with today’s mining methods on land. Deep-sea mining is an industry still in its infancy, and ...
  • Å opparbeide endringskapasitet i en sykehusorganisasjon. En kvalitativ undersøkelse av endringsarbeid i en sykehusavdeling 

    Eriksdatter Tradin, Guro (Master thesis; Mastergradsoppgave, 2020-06-19)
    Temaet for denne studien er endringskapasitet i offentlige organisasjoner der mange organisasjoner ofte står i flere endringsprosesser samtidig. Hensikten er å få økt forståelse og kunnskap om hvordan organisasjoner som sykehussektoren håndtere endringer, samtidig som de må ivareta den daglige driften. I tillegg vil studien belyse hvordan et dynamisk begrep som endringskapasitet kan tilpasse seg ...
  • Environmental drivers of population-level variation in the migratory and diving ontogeny of an Arctic top predator 

    Grecian, W. James; Stenson, Garry B.; Biuw, Martin; Boehme, Lars; Folkow, Lars; Goulet, Pierre J.; Jonsen, Ian D.; Malde, Aleksander; Nordøy, Erling Sverre; Rosing-Asvid, Aqqalu; Smout, Sophie (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-02)
    The development of migratory strategies that enable juveniles to survive to sexual maturity is critical for species that exploit seasonal niches. For animals that forage via breath-hold diving, this requires a combination of both physiological and foraging skill development. Here, we assess how migratory and dive behaviour develop over the first year of life for a migratory Arctic top predator, the ...
  • Mid-summer vertical behavior of a high-latitude oceanic zooplankton community 

    Bandara, Kanchana; Basedow, Sünnje Linnéa; Pedersen, Geir; Tverberg, Vigdis (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-18)
    Vertical behavior, such as diel vertical migration (DVM) and swarming are widespread among zooplankton. At higher latitudes, synchronized DVM is mostly absent during summer and predominantly herbivorous copepods tend to form large near-surface swarms. This behavior is risky because it can make them vulnerable to visual predators. Here, we used ca. 12 days of mid-summer (28 June to 10 July 2018) ...
  • Increasing catch efficiency for Nephrops in deep-water shrimp (Pandalus borealis) trawl fisheries 

    Ingólfsson, Ólafur Arnar; Jørgensen, Terje; Sistiaga, Manu; Herrmann, Bent; Kvalvik, Liz Beate Kolstad (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-14)
    In Skagerrak and the North Sea, coastal vessels harvest deep-water shrimp (Pandalus borealis) in a mixed fishery, in which catches of Nephrops (Nephrops norvegicus) are of economic importance for the fleet. Fishermen targeting shrimp in this area must use a sorting grid with a maximum bar spacing of 19 mm, which means that only the smallest Nephrops can pass through the grid to be retained in the ...
  • De unge vil lære å lage spennende torskemiddager 

    Alm, Siril (Journal article; Tidsskriftartikkel, 2022-05-24)
    Sjømatkonsumet blant våre unge voksne fortsetter å synke. En Nofima-undersøkelse indikerer at konsumet kan økes hvis de blir inspirert til å lage spennende retter med hvit fisk.
  • Antimicrobial peptides in sea urchins. Isolation, characterization and expression 

    Li, Chun (Doctoral thesis; Doktorgradsavhandling, 2010)
    <p>Echinoderms are interesting animals for biodiscovery/bioprospecting as sources for novel compounds that have interesting activities. These compounds might be developed into potential drug candidates. In this work, two novel families of short proteins, referred to as antimicrobial peptides (AMPs) were isolated and characterized from the sea urchin, <i>Strongylocentrotus droebachiensis</i>. One of ...
  • Diagnostikk av parasittsykdommer 

    Dale, Ole Bendik; Hansen, Haakon; Tørud, Brit; Erkinharju, Toni; Gjessing, Mona Cecilie (Journal article; Tidsskriftartikkel, 2022)
    Parasitter er alle snyltere, men de tilhører svært ulike grupper og har et mangfoldig levesett!
  • Tracking decision-making of backcountry users using GPS tracks and participant surveys 

    Hendrikx, Jordy; Johnson, Jerry; Mannberg, Andrea (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-03)
    Snow avalanches are a significant natural hazard representing the primary risk of death to backcountry travelers in many alpine countries. Careful use of backcountry terrain through effective decision making can mitigate the risk of dangerous snowpack conditions, but requires relevant knowledge and experience. We present the results from a large-scale crowd sourced data collection method from ...
  • Temporal Trends of Organochlorine and Perfluorinated Contaminants in a Terrestrial Raptor in Northern Europe Over 34 years (1986–2019) 

    Bustnes, Jan Ove; Bårdsen, Bård-Jørgen; Herzke, Dorte; Bangjord, Georg; Bourgeon, Sophie; Fritsch, Clémentine; Eulaers, Igor (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-21)
    Fourteen legacy organochlorine (OC) contaminants and 12 perfluoroalkyl substances (PFASs) were measured in eggs of tawny owls (Strix alueco) in central Norway (1986–2019). We expected OCs to have reached stable equilibrium levels due to bans, and that recent phase-out of some PFASs would have slowed the increase of these compounds. ∑OC comprised on average approximately 92% of the measured compounds, ...
  • Congruent responses to weather variability in high arctic herbivores 

    Stien, Audun; Ims, Rolf Anker; Albon, Steve D.; Fuglei, Eva; Irvine, R.J.; Ropstad, Erik; Halvorsen, Odd; Langvatn, Rolf; Loe, Leif Egil; Veiberg, Vebjørn; Yoccoz, Nigel (Journal article; Tidsskriftartikkel; Peer reviewed, 2012-09-26)
    Assessing the role of weather in the dynamics of wildlife populations is a pressing task in the face of rapid environmental change. Rodents and ruminants are abundant herbivore species in most Arctic ecosystems, many of which are experiencing particularly rapid climate change. Their different life-history characteristics, with the exception of their trophic position, suggest that they should show ...
  • Temporal correlations among demographic parameters are ubiquitous but highly variable across species 

    Fay, Rémi; Hamel, Sandra; Van de Pol, Martijn; Gaillard, Jean Michel; Yoccoz, Nigel; Acker, Paul; Authier, Matthieu; Larue, Benjamin; Le Coeur, Christie; Macdonald, Kaitlin R.; Nicol-Harper, Alex; Barbraud, Christophe; Bonenfant, Christophe; Van Vuren, Dirk H.; Cam, Emmanuelle; Delord, Karine; Gamelon, Marlène; Moiron, Maria; Pelletier, Fanie; Teplitsky, Céline; Visser, Marcel E.; Wells, Caitlin P.; Wheelwright, Nathaniel T.; Jenouvrier, Stéphanie; Sæther, Bernt-Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-24)
    Temporal correlations among demographic parameters can strongly influence population dynamics. Our empirical knowledge, however, is very limited regarding the direction and the magnitude of these correlations and how they vary among demographic parameters and species’ life histories. Here, we use long-term demographic data from 15 bird and mammal species with contrasting pace of life to quantify ...

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