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Post mortem proteolytic degradation of myosin heavy chain in skeletal muscle of Atlantic cod
(Doctoral thesis; Doktorgradsavhandling, 2011-01-28)
One of the most important parameters of quality regarding meat both from mammals and fish is texture. The post mortem degradation of muscle and connective tissue proteins during tenderization of meat from warm-blooded animals is unwanted in fish due to a loss of product quality. Soft fillet and gaping are common problems both in wild and farmed cod and have huge impact on the quality and the consumers’ ...
Scavenging amphipods in the high Arctic : Studies of benthic and sympagic amphipods in the genera Onisimus and Anonyx
(Doctoral thesis; Doktorgradsavhandling, 2011-05-02)
The main objective of this study was to increase our knowledge about the ecology of scavenging amphipods, particularly amphipods within the genera Onisimus and Anonyx. Specifically, the emphasis was to increase the knowledge of ice-associated (sympagic) Onisimus-species, but as these species are rather inaccessible, an approach using benthic congeners as proxies was chosen. By studying the shallow-water ...
Moderators in the relationship between satisfaction and loyalty of Vietnamese fish products consumers
(Doctoral thesis; Doktorgradsavhandling, 2011-02-26)
This study first discusses and tests the strength and possible different forms of the relationships between satisfaction and loyalty. Secondly, it focuses on if, and how, satisfaction strength properties (e.g. involvement, ambivalence, knowledge, and certainty) moderate the satisfaction–loyalty relationship. It also extends to discuss and test the role of perceived risk in the satisfaction–loyalty ...
The immune system of Atlantic cod : with emphasis on intestinal immunology
(Doctoral thesis; Doktorgradsavhandling, 2011-04-08)
Torskeoppdrett er en lovende industri i Norge, men problemer med blant annet bakteriesykdommer gjør at næringen fortsatt har problemer med å etablere seg. For å få kontroll med sykdomsproblemene i næringen, er grunnleggende kunnskap om hvordan torsken beskytter seg mot infeksjoner nødvendig. Hensikten med dette doktorgradsarbeidet har vært å studere forsvarssystemet hos torsk, med et spesielt fokus ...
Planktonic food webs in the Arctic Ocean : structure and function in contrasting seasons and physical settings across Fram Strait
(Doctoral thesis; Doktorgradsavhandling, 2011-12-08)
This thesis investigates the structure and function of planktonic food webs at two sites between Greenland and the Svalbard Archipelago, covering a coastal ecosystem influenced by Atlantic water masses (Kongsfjorden, 78º N) and a more oceanic system off the East Greenlandic shelf, influenced by the outflow of Arctic water and sea ice from the Arctic Ocean (northwest Fram Strait, 75 - 80º N). In ...
Studies on the amphipod genus Metopa (Stenothoidae) : Taxonomy, Ecology, Phylogeny
(Doctoral thesis; Doktorgradsavhandling, 2011-12-19)
The Amphipod-genus Metopa is a relatively large genus, with currently 55 accepted
species. This PhD thesis consists of redescriptions of 23 of these species based on typespecimens
or specimens collected and identified by the original authors; this has been
done to create consistent descriptions that could form a basis for a phylogenetic analysis
of Metopa. For some species Scanning Electron ...
Bacterial flagellin : a novel adjuvant for vaccine strategies
(Doctoral thesis; Doktorgradsavhandling, 2011-10-18)
Flagellin is the principal structural protein in the locomotive organ flagellum present on flagellated bacteria, and is known to be an important evolutionarily conserved PAMP. Flagellin has been shown to bind to the PRR TLR5 which induces innate immune system responses and signaling pathways. In mammals, much focus has been placed on this protein in vaccine studies for its possible function as an ...
Species concepts and functional aspects of cold-water diatoms (Bacillariophyceae)
(Doctoral thesis; Doktorgradsavhandling, 2011-10-18)
The choice of species concept when delineating phytoplankton species is decisive for our knowledge of species diversity and distribution, but will also affect our understanding of the functioning of marine ecosystems. This is particularly true for so-called cryptic species, which may show high degree of genetic and physiological heterogeneity although being morphologically similar. A precise species ...
Fishing for Advice : the case of the Norwegian Reference Fleet
(Doctoral thesis; Doktorgradsavhandling, 2011-12-15)
This dissertation is about the changing relationship between science and society and the attempt to organize knowledge production and advisory processes in new ways: How can the relations between science and society be organized in a way that ensures sound advice as well as democratic ideals such as transparency and inclusion? Is it possible to relax the boundary between science and society without ...
Cellular responses induced by environmental stress factors in Arctic Seabird chicks : Responses of the antioxidant defense system and autophagic lysosomal processes related to contaminant exposure and food restriction
(Doctoral thesis; Doktorgradsavhandling, 2011-11-29)
This PhD study has investigated how two commonly occurring environmental stress factors in the Arctic (periods with little food and exposure to halogenated organic contaminants) have had an impact on two important cellular defense mechanisms in Arctic seabirds.
The antioxidant defense system and autophagic lysosomal responses in liver cells of Arctic seabird chicks have been studied. Samples ...