Now showing items 1-10 of 17
Mass cultivation of some common coldwater diatoms (Bacillariophyceae): lipids vs. growth conditions
(Doctoral thesis; Doktorgradsavhandling, 2017-02-27)
The present study was aimed at investigating northern diatoms as sustainable sources of omega-3 fatty acids widely used and now much needed in salmon aquaculture as well as ingredients to be used in nutraceuticals in the human diet. As known, fish oil is currently the main source of physiologically requisite fatty acids such as eicosapentaenoic (EPA) and docosahexaenoic acids (DHA). Due to the rapid ...
Endogenous sharing of knowledge
(Doctoral thesis; Doktorgradsavhandling, 2017-12-13)
This thesis investigates the willingness of firms to cooperate on Research and Development (R&D). I present three papers concerning incentives to share/exchange knowledge created by the firms’ own R&D. It is my hope that this thesis can give some clues of how sharing and exchange of knowledge can contribute to an already large literature on Research and Development.
Hvordan nød og nye ideer skaper nye lover: Speilvendingen av sjøgrenseloven i 1992
(Doctoral thesis; Doktorgradsavhandling, 2017-01-13)
Avhandlingen viser hvordan lovverket gjenspeiler samfunnets skiftende behov og virkelighetsoppfatninger. Eksempelet som brukes for å illustrere dette, er en lovendringsprosess i fiskerisektoren. Frem til 1992 var det forbudt for utenlandske fiskere å levere fisk i norsk havn. En ressurskrise, torskekrisa i Nord-Norge på slutten av 1980-tallet, gjorde at det ble stilt spørsmål ved dette forbudet: ...
Microbial community variation in an Arctic shelf seafloor. Biogeographic and anthropogenic influences
(Doctoral thesis; Doktorgradsavhandling, 2017-04-21)
Studying the spatial patterns of microbial diversity is crucial in order to assess the relationship between community structure and ecosystem function. However, due to methodological limitations in the past, relatively little has been known about the biogeography of microbial communities. The introduction of next generation sequencing technologies from 2005 was a game changer, as DNA sequencing ...
The fate of a key Arctic copepod in future ocean acidification: Integrating molecular, organismal, and evolutionary thinking in the face of climate change
(Doctoral thesis; Doktorgradsavhandling, 2017-05-05)
Uptake of anthropogenic carbon dioxide (CO2) into the world’s oceans is increasing seawater acidity in a process termed ocean acidification. This is predicted to have harmful effects on a variety of marine organisms. With the greatest and fastest changes in pH expected to occur the Arctic seas over the next 100 years, the need for understanding the effects of low pH on Arctic marine organisms is ...
Economic analysis of Marine Protected Areas: Bioeconomic Modeling and Economic Valuation Approaches
(Doctoral thesis; Doktorgradsavhandling, 2017-04-05)
Marine protected areas (MPAs) are often established for conservation objectives. Benefits provided by MPAs exceed pure biodiversity conservation as they may include contributions to social and economic benefits of local communities. And though it is still debated, MPAs may provide a management tool for sustainable fisheries and/or solving conflicts of interests between users of marine resources. It ...
Understanding winter patterns of zooplankton Diel Vertical Migration (DVM) in a high Arctic fjord (Kongsfjorden, Svalbard)
(Doctoral thesis; Doktorgradsavhandling, 2017-05-09)
Recent Arctic studies contradict a long-held paradigm of winter quiescence by documenting activity at many trophic levels in the marine food web even during the darkest months of winter. Previous studies have failed to identify which species are performing patterns of vertical migrations during polar night in Kongsfjorden (Svalbard). In the present study, acoustic data supplemented by zooplankton ...
Gut metagenomics in relation to diet and methanogenesis in arctic herbivores
(Doctoral thesis; Doktorgradsavhandling, 2017-06-01)
Enteric methane (CH4) from gut microbial fermentation of complex organic polymers in ruminants comprises an important source of the anthropogenic CH4 emissions and may also represent a significant loss of metabolic energy to the host animal depending on diet. CH4 is produced by specialized microbes called methanogens. Extensive research exists on enteric CH4 production and methanogens in domestic ...
Calanus glacialis and C. finmarchicus in a warming Arctic Implications of increasing temperature at the individual and population level
(Doctoral thesis; Doktorgradsavhandling, 2017-03-21)
Climate change is particularly pronounced in the Arctic and water temperatures are predicted to increase substantially. This has important implications for Arctic marine organism, especially ectotherms, such as copepods. The calanoid copepods Calanus glacialis and C. finmarchicus are key species of different pelagic food webs at high latitudes and changes in temperature will likely affect them ...
Antibacterial and anti-biofilm activity of novel marine natural product mimics
(Doctoral thesis; Doktorgradsavhandling, 2017-01-20)
Infectious diseases represent an urgent public health problem globally. Particularly healthcare-associated infections are often complicated by antibiotic resistance and presence of recalcitrant microbial biofilms. On the hunt for effective antibiotics with novel mechanisms of action (MOA), researchers look into largely unexplored natural environments with high biodiversity like the oceans, rich in ...