Recent additions

  • Bioprospecting of marine phytoplankton from large scale cultivation - Effect of culture conditions on bioactivity and biochemistry of the diatom Porosira glacialis 

    Osvik, Renate Døving (Doctoral thesis; Doktorgradsavhandling, 2021-06-23)
    The diatoms make up the largest and most important group of marine microalgae. They are responsible for a quarter of all inorganic carbon fixation in the ocean and are thus of immense importance for global CO2 sequestration. This makes them good candidates for biological carbon capture and utilization (CCU) by mass cultivation using CO2 emissions from industrial point sources. Large scale cultivation ...
  • Bioprospecting of marine fungi from the High Arctic: A study of high latitude marine fungi from understudied taxa; bioactivity potential, taxonomy and genomics 

    Hagestad, Ole Christian (Doctoral thesis; Doktorgradsavhandling, 2021-06-17)
    Marine fungi comprise a group of organisms that have been overlooked for a long time. Research interest has increased with the realization of the important ecological role and rich chemistry of marine fungi. Marine fungi have yielded thousands of new natural products the last decade, but many taxa remain unstudied. Marine fungi from the Arctic have not been reported in literature in regard to ...
  • Fisher's effort allocation behavior and decision-making process in the Norwegian trawl fishery 

    Alizadeh Ashrafi, Tannaz (Doctoral thesis; Doktorgradsavhandling, 2021-06-09)
    The empirical investigation of fishers’ harvest behavior is an important but neglected strand of fishery science. In this thesis, we fill some of this gap by developing empirical models to investigate trawlers’ harvest behavior over time and space in codfish fisheries, managed using individual vessel quotas (IVQs). Fishers’ harvest behavior is reflected in the decision-making processes underlying ...
  • Porosira glacialis as a possible source of lipids for human consumption and aquaculture feed 

    Dalheim, Lars (Doctoral thesis; Doktorgradsavhandling, 2021-05-20)
    Det er et stort behov for marine langkjedede omega-3 fettsyrer både til humant konsum og til fiskefôr. De langkjedede omega-3 fettsyrene EPA og DHA har gunstige helseeffekter for både mennesker og fisk. Mengden villfanget fisk har de siste 40 årene nådd maksimal utnyttelse mens volumet av oppdrettsfisk har økt betraktelig. Mangelen på marint råstoff har ført til en økt andel terrestrisk råstoff i ...
  • Towards mass cultivation of diatoms as a source of marine lipids 

    Svenning, Jon Brage (Doctoral thesis; Doktorgradsavhandling, 2021-04-23)
    The global demand for the long-chain omega-3 fatty acids EPA and DHA is increasing, and the traditional sources of these fatty acids, fish oils, are no longer able to sustain the demand. This shortage is mainly a result of the surging requirement of EPA and DHA as ingredients in fish feed for aquaculture, and as dietary supplements for human consumption. As a result, there is an increased interest ...
  • Photoperiodic history-dependent preadaptation of the smolting gill. Novel players and SW immediate response as markers of growth and welfare 

    Iversen, Marianne (Doctoral thesis; Doktorgradsavhandling, 2021-04-16)
    This thesis presents a rich introduction to the evolution, life history and physiology of Atlantic salmon, with a special emphasis on the developmental transitions (termed smolting) juvenile salmon pass through has they prepare to migrate from their native freshwater habitat to the sea. The introduction provides a comprehensive background on chronobiology and osmoregulation in fishes and links this ...
  • Circadian-based processes in the High Arctic: activity, thermoregulation and photoperiodism in the Svalbard ptarmigan (Lagopus muta hyperborea) 

    Appenroth, Daniel (Doctoral thesis; Doktorgradsavhandling, 2021-04-15)
    <p>This thesis addresses aspects of the circadian and photoperiodic system in a High Arctic bird: the Svalbard ptarmigan (<i>Lagopus muta hyperborea</i>, Sundevall 1845). The most northern resident bird inhabits a unique photic environment; 2/3 of its year it spends either under a night without sunrise (polar night) or under a never setting Sun (polar day). Studies so far suggest a temporal loss of ...
  • Microbial diversity and ecology in the coastal Arctic seasonal ice zone 

    Vonnahme, Tobias (Doctoral thesis; Doktorgradsavhandling, 2021-03-11)
    Marine microbes are crucial for the marine food web and carbon cycle. Algae are the main source of organic matter in the oceans with algae blooms triggering reoccurring bacterial succession patterns. Bacteria can recycle nutrients from organic matter coming from land or algae, fueling regenerated primary production. Terrestrial freshwater inputs can have substantial impacts on Arctic marine microbes ...
  • Present and future time perspectives and health behavior 

    Pozolotina, Tatiana (Doctoral thesis; Doktorgradsavhandling, 2021-03-12)
    <p><i>Background and purpose: </i>Lifestyle diseases are the leading cause of life-time disability and death in modern society. Knowledge of the underlying causes and mechanisms of health behavior choices is crucially important when developing health-promoting campaigns and planning health behavior interventions. This dissertation aimed to advance our understanding of the relationship between time ...
  • Fouling of macro epibionts on cultivated Saccharina latissima (Phaeophyceae). In situ temporal and spatial variation 

    Matsson, Sanna (Doctoral thesis; Doktorgradsavhandling, 2021-03-04)
    The motivation for macroalgal cultivation is to meet the global demand for food, energy and biomaterials for a rapidly growing human population in the context of the challenges of limited terrestrial food resources. Over the last 20 years the interest in seaweed cultivation has increased in European countries, and the kelp <i>Saccharina latissima</i> is one of the best-suited species for cultivation ...
  • Firm internal drivers for eco-process innovation - A multi-method analysis of energy efficiency in Norwegian manufacturing firms 

    Solnørdal, Mette Talseth (Doctoral thesis; Doktorgradsavhandling, 2021-02-17)
    The high energy intensity of the manufacturing sector places it at the centre of all greenhouse gas emission abatement programmes. The thesis is thus motivated by the need to increase the environmental performance of the sector, and aims to explore the internal drivers in stimulating eco-process innovation in manufacturing firms. To this end, I use an explorative research design and explore the ...
  • Honesty in economic experiments 

    Birkelund, Johan (Doctoral thesis; Doktorgradsavhandling, 2020-12-14)
    This thesis investigates preferences for honesty in economic experiments. Preferences for honesty have attained a fair amount of attention in the last couple of decades, from multiple areas within the social sciences, including economics. This thesis may serve as an introduction to the field. First, it provides an introduction to experiments in economics, before it dives into how economists conduct ...
  • Human impact on highly mobile cetaceans: the use of biotelemetry data to inform ocean management 

    Mul, Evert (Doctoral thesis; Doktorgradsavhandling, 2020-12-03)
    <p>The human presence in the worlds’ oceans is increasing, in response to the growing demand for marine resources. This expansion of human activities will increase pressure on marine ecosystems and demands a responsible ocean management, to ensure the sustainable use of marine resources. Highly mobile marine top predators, such as cetaceans (whales, dolphins and porpoises) are exposed to a multitude ...
  • Microbial eukaryotes and their functional importance in the Arctic. A Svalbardian perspective 

    Wutkowska, Magdalena (Doctoral thesis; Doktorgradsavhandling, 2020-11-06)
    <p>Microbial eukaryotes, including protists and fungi, play diverse functions in virtually all ecosystems. In the High Arctic, their high biomass and diversity reflects crucial ecological importance and the performance of key ecological processes. Protists are the main primary producers in arctic seas, whereas fungi are an important group of decomposers and symbiotic partners of plants in terrestrial ...
  • Application of economic tools for informing Atlantic salmon management in Norway. Opportunity cost of protection measures, valuation of ecosystem services and environmental cost-benefit analysis. 

    Nikitina, Ekaterina (Doctoral thesis; Doktorgradsavhandling, 2020-10-23)
    This thesis explores various aspects of the application of economic analysis to Atlantic salmon management in Norway. The purpose and contributions are twofold. On the one hand, the thesis seeks to improve economic toolbox used to analyse environmental-economic trade-offs. On the other hand, it yields specific conclusions and recommendations for the case of Atlantic salmon management in Norway and ...
  • Understanding and forecasting population dynamics in changing arctic ecosystems 

    Marolla, Filippo (Doctoral thesis; Doktorgradsavhandling, 2020-10-21)
    Rapid environmental changes are currently occurring in the Arctic because of global warming. Arctic food webs can exhibit complex dynamics because of the prevalence of tight interactions between trophic levels. Climate change impacts can therefore propagate across food webs and result in non-trivial indirect effects on arctic species and populations. In this thesis, constituted by four papers, I ...
  • The spread of salmon lice (Lepeophtheirus salmonis Krøyer) from Norwegian fish farms and their impact on sea trout (Salmo trutta L.) 

    Serra-Llinares, Rosa Maria (Doctoral thesis; Doktorgradsavhandling, 2020-10-09)
    <p>The transmission of salmon lice (<i>Lepeophtheirus salmonis</i> Krøyer) from farm salmon to wild salmonids and the impact on wild populations are sources of intense debate in all salmon producing countries, and it is currently an issue of high political and economic relevance in Norway. Solid science-based evidence is therefore needed by decision makers to apply sound management strategies. Given ...
  • Bioactive secondary metabolites from bacteria. Natural products from marine and terrestrial bacteria, dereplication, isolation and investigation of bacterial secondary metabolites 

    Schneider, Yannik Karl-Heinz (Doctoral thesis; Doktorgradsavhandling, 2020-09-29)
    The thesis gives an introduction to natural product drug discovery and the underlying chemical principles that make natural products privileged structures for drug discovery. Paper I deals with the isolation of Lipid 430 from cultures of two <i>Algibacter</i> sp. isolates and the investigation of their anti-proliferative and anti-bacterial effect. Paper II describes the isolation of Serratiochelin ...
  • Short-term tundra plant-community nutrient responses to herbivory and warming: New insights from Near infrared-reflectance spectroscopy methodology 

    Petit Bon, Matteo (Doctoral thesis; Doktorgradsavhandling, 2020-09-22)
    In the long-term, herbivores and climate warming have been shown to alter nutrient levels in tundra plant communities by changing the functional composition of the vegetation. Here, I asked the extent to which they affect tundra plant-community nutrient levels in the short-term by directly modifying the chemistry of plants. I first developed a time- and cost-effective method that allowed me to ...
  • Mapping nature’s contribution to people: Opportunities and limitations of crowdsourced data to identify place-based values and conservation concerns 

    Muñoz, Lorena (Doctoral thesis; Doktorgradsavhandling, 2020-06-16)
    Nature provides people with a wide range of benefits, also known as nature’s contributions to people (NCP). The NCP framework evolved from the Ecosystem services (ES) concept as a response to the critiques and misconceptions associated with ES over the last years. Broadening ES valuations that have been dominated by economic valuations, the NCP framework emphasizes a pluralistic approach to valuation ...

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