Browsing Department of Biological Sciences by Document Types "Doctoral thesis"
Now showing items 1-20 of 240
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Adaptation of anemonefish to their host anemones: From Genetics to Physiology
(Doctoral thesis, 2020-02-21)The mutualism between anemonefish and anemones can be studied in terms of permanent or temporary adaptation of fish toward their host anemones. This thesis explores this theme, and aims to test (1) Whether a mutual ... -
Anaesthesia of farmed fish with special empasis on atlantic cod (Gadus morhua) and atlantic habibut (Hippoglossus hippoglossus)
(Doctoral thesis, 2011-03-23)During the life cycle as farmed animals there are numerous situations where fish are subjected to handling and confinement. Netting, weighing, sorting, vaccination, transport and, at the end, slaughter are common events ... -
Analysis of IgM sub-variants related to ancestral tetraploidy in salmonid fish
(Doctoral thesis, 2013-03-21)Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) possess two paralogous IgM heavy chain (μ) genes related to ancestral tetraploidy. Accordingly, IgM subpopulations of Atlantic salmon and brown trout can be ... -
Analysis of sequencing data in environmental genomics. Exploring the diversity of the microbial biosphere
(Doctoral thesis, 2013-04-12)Most life on this planet is microbial and for the last two decades, environmental genomics has contributed to reveal an impressive biodiversity of this microbial life. This approach applies DNA sequencing to environmental ... -
Analysis of transcription factor complexes and their associated chromatin interactions during erythropoiesis
(Doctoral thesis, 2014-01-17)Cis-regulatory elements can control gene transcription over large distances. Studying the association between cis-regulatory elements and the mechanism of gene regulation is important since the disruption in the transcriptional ... -
The antecedents and consequences of students´ autonomous motivation. The relation between need-support, motivation, and academic achievement
(Doctoral thesis, 2018-02-16)Higher education has traditionally rested on teacher-centred education. Recently, there has been a shift towards learner-centred education. Innovative teaching tools, active teaching methods, and teachers that encourages ... -
Application of CRISPR-based gene editing tools in Atlantic salmon
(Doctoral thesis, 2024-05-15)Atlantisk laks er den viktigaste arten i norsk havbruksnæring. Næringa i Noreg er i dag ramma av fleire berekraftsufordringar, til dømes genetisk innblanding av rømt laks, og spreiing av smittsame sjukdommar. Dette påverkar ... -
Aquaculture relevant stressors and their impacts on skin and wound healing in post-smolt Atlantic salmon (Salmo salar L.)
(Doctoral thesis, 2018-11-30)The work described in this thesis focuses on the response mechanisms in the skin of post-smolt Atlantic salmon (Salmo salar L.) under the following challenging conditions: <ul> i. The effect of high biomass and low specific ... -
Archaeological bird remains from Norway as a means to identify long-term patterns in a Northern European avifauna
(Doctoral thesis, 2021-06-18)Birds are currently facing a biodiversity crisis. Seabirds, birds in agricultural landscapes, and montane birds are particularly vulnerable to extinction. Whilst their modern distributions are well studied, how past events ... -
The Arctic Mid-Ocean Ridge Vent Fields - A valuable Resource for Marine Bioprospecting?
(Doctoral thesis, 2016-05-25)The past decade the awareness for sustainability has come more and more into focus of society in terms of a need for eco-friendlier processes and renewable energies, new and better pharmaceuticals, and agricultural- and ... -
Assessing and comparing climatic control on distribution and reproduction of alpine and lowland species in the subalpine habitat of western Norway.
(Doctoral thesis, 2012-02-06)Aims and background: Species range shift is among the most well-documented responses to climate change. As a result, a growing number of studies model species climatic niches to predict how species ranges may displace in ... -
At what cost? Attempting to quantify cost of resistance in bacterium-phage interactions
(Doctoral thesis, 2023-12-15)Biodiversiteten i mikrobielle samfunn er svært stor. Organismene som danner samfunnet må stadig gjøre avveininger mellom ulike karaktertrekk som påvirker deres muligheter for vekst, konkurranse og overlevelse. For å beskrive ... -
Atlantic salmon (Salmo salar L.) sterol metabolism and metabolic health – impact of dietary lipids
(Doctoral thesis, 2014-12-12)Marine resources are today limited, and due to this there is an increasing inclusion of non-marine lipids in the diet of farmed salmonids. An optimal diet for farmed Atlantic salmon (Salmo salar L.) should not only promote ... -
Bacterial biofilms on the kelp Laminaria hyperborea
(Doctoral thesis, 2011-03-23)This thesis deals with bacterial communities in biofilms on the surfaces of the kelp Laminaria hyperborea and their roles in carbon cycling. Kelp forests are characterized by high biodiversity and productivity, and cycling ... -
Bacterial community structures in the Arctic Ocean: the effect of increased carbon load on nutrient competition and bacterial diversity
(Doctoral thesis, 2012-06-29)The Arctic Ocean is a unique marine environment with respect to irradiation periodicity and intensity, temperature, ice formation and strong stratification. Changes due to global warming might be more pronounced in this ... -
Bacterial growth control in marine environments : from experimental approaches to comparative analyses
(Doctoral thesis, 2010-12-14)To understand (1) the role of heterotrophic bacteria in the biogeochemical cycles, (2) the fate of the organic carbon and mineral nutrients, and (3) the flow of energy to higher trophic levels, we need to understand how ... -
Basic mechanisms for control of appetite and feed intake in Atlantic salmon (Salmo salar)
(Doctoral thesis, 2022-11-10)Atlantisk laks (Salmo salar L.) er en nøkkelart i norsk sjømateksport, og representerer 70 – 80 Mrd NOK i verdi. Den store økningen i produksjon kombinert med overfôring har bidratt til negative effekter på det marine ... -
Behavioural effects of naval sonars on fish and cetaceans
(Doctoral thesis, 2011-04-01)Anthropogenic noise in the sea has increased during the past decades as a consequence of increased shipping traffic, oil and gas exploitation, and underwater construction work (Southall et al., 2007; Slabbekoorn et al., ... -
Biodiversity and spatial ecology of arctic sponge grounds in the Nordic Seas
(Doctoral thesis, 2022-06-17)Sponge grounds are biogenic habitats formed by large structure-forming sponges in the deep-sea. They are biodiversity hotspots because they provide associated fauna a place of refuge, additional substratum, foraging areas, ... -
Biological and ecological effects of Ligula intestinalis (Linnaeus, 1758) in a fish host Engraulicypris sardella (Gütter, 1868) from Tanzanian side of Lake Nyasa
(Doctoral thesis, 2020-10-23)The current thesis investigates the epidemiological, behavioral and evolutionary effects of the tapeworm Ligula intestinalis in the ‘Nyasa sardine’ (Engraulicypris sardella), an intermediate fish host, endemic to Lake ...