Blar i Doctoral theses (VetMed) på tittel
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Insect larvae meal as a feed ingredient for Atlantic salmon (Salmo salar) : effects on intestinal function, health, and microbiota
(PhD thesis;2021:75, Doctoral thesis, 2021)Being part of fish’s natural diets, insects have become a realistic, sustainable feed ingredient for aquaculture. While insects’ nutritional values have been extensively studied in numerous fish species, their impact on ... -
Intestinal functions and health of Ballan wrasse (Labrus bergylta) and lumpfish (Cyclopterus lumpus) : effects of variation in diet composition
(PhD thesis;2023:8, Doctoral thesis, 2023)To rear cleaner fish together with Atlantic salmon (Salmo salar) is a biological strategy to keep sea lice away from the salmon. Ballan (B) wrasse (Labrus bergylta) and lumpfish (Cyclopterus lumpus) are the two species ... -
Intestinal microbiota, red meat, and colorectal tumours in dogs
(PhD Thesis;2018:42, Doctoral thesis, 2018)Tarmens mikrobiota består av et rikt nettverk av mikrober som har betydning for vertens fysiologi, og således helse og velvære. Mikrobiotaen påvirkes av diettens sammensetning av makronæringsstoffer (karbohydrater, proteiner, ... -
Intestinal protozoa in wildlife : parasite transmission at the wildlife-human-domestic animal interface
(PhD Thesis;2017:56, Doctoral thesis, 2017)The interfaces between humans, wild animals, and domestic animals are changing. This process is driven by a multitude of factors, including changes in land use, habitat loss and fragmentation, climate change, ecotourism, ... -
Intestinal protozoan parasites in Northern India : investigations on transmission routes
(PhD Thesis;2018.10, Doctoral thesis, 2017)Cryptosporidium and Giardia are protozoan parasites that have been confirmed as major causes of diarrhoea, particularly in children. They represent a significant, but often neglected, threat to public health, and particularly ... -
Introductory studies on bacterial agents infecting cleaner fish
(PhD Thesis;2015:98, Doctoral thesis, 2017-07-14)Cleaner fish (wrasse and lumpsucker) are used extensively in Norwegian salmon farms for biocontrol of sea louse infestation, but cleaner fish health and welfare has only recently become a focus of attention. Bacterial ... -
Investigation of the gut-associated lymphoid tissue in sheep with emphasis on natural killer cells
(PhD Thesis;2015:52, Doctoral thesis, 2017-07-04)The gut-associated lymphoid tissue (GALT) of sheep has been investigated for decades, and several immune cells receding within these structures have been described. The GALT of sheep has specialized compartments described ... -
Investigations on Cryptosporidium and Giardia in Tigray, Ethiopia from a One Health Perspective
(PhD Thesis;2022:54, Doctoral thesis, 2022)Enteric protozoans Cryptosporidium spp. and Giardia duodenalis are among the leading causes of diarrhoea in children. These parasites have particular impact in lowand middle-income countries. In these countries, people ... -
Levels of persistent organic compounds and heavy metals in farmed and wild fish from Zambia and Tanzania, and assessment of possible health effects
(PhD thesis;2023:9, Doctoral thesis, 2023)Pollution of water bodies due to human activities is a threat to sustainable fisheries. Pollutants like heavy metals and persistent organic pollutants (POPs) can affect biological functions in fish and human. This leads ... -
Lipid and choline supply affect Atlantic salmon enterocyte steatosis : in vivo and in vitro studies
(PhD thesis;2024:10, Doctoral thesis, 2024)The shift of farmed Atlantic salmon from a marine- to plant-based diet the last decades has revealed challenges concerning the dietary requirements necessary to ensure fish health. Of the nutrients lacking in plant feeds, ... -
Medaka (Oryzias latipes) gonadotropins : production and developmental profiles, pharmacological characterization of their receptors, and establishment of a novel transgenic line tg(fshb:DsRed2)
(PhD Thesis;2019:6, Doctoral thesis, 2019)The gonadotropins, follicle-stimulating hormone (Fsh) and luteinizing hormone (Lh), produced in gonadotrope cells of the pituitary, possess key roles in the endocrine control of vertebrate puberty and reproduction as part ... -
Melanised focal changes in Atlantic salmon : interactions between infection and immunity
(PhD Thesis;2021:82, Doctoral thesis, 2022)Atlantic salmon (Salmo salar) farming has increased rapidly in Norway over the last 50 years. However, the large-scale farming of salmon battles serious health problems. There are currently many adverse conditions threatening ... -
Microbe-associated molecular patterns of Aliivibrio salmonicida : roles in the pathogenesis of cold-water vibriosis
(PhD Thesis;2017:62, Doctoral thesis, 2017)Aliivibrio salmonicida is the cause of cold-water vibriosis, a hemorrhagic septicemia of farmed salmonids. Previous reports have shown that Al. salmonicida is able to circumvent defense systems of the fish host, and it ... -
Microbial interactions : effects on virulence in Enterohaemorrhagic Escherichia coli (EHEC)
(PhD Thesis;2015:51, Doctoral thesis, 2017-07-13)Enterohaemorrhagic Escherichia coli (EHEC) is an emerging food borne pathogen associated with a number of outbreaks worldwide, and is a serious public health threat. The symptoms of the disease can range from mild diarrhoea ... -
Molecular characterization of Piscine orthoreovirus (PRV) and its pathogenesis in salmonids
(PhD Thesis;2019:79, Doctoral thesis, 2019)Piscine orthoreovirus (PRV) is a virus of salmonid fish. PRV has been associated with different diseases in various salmonid fish species, including heart and skeletal muscle inflammation (HSMI) in Atlantic salmon and more ... -
Molecular studies of Piscine orthoreovirus : viral factories, kinetics and vaccination
(PhD Thesis;2017:79, Doctoral thesis, 2018)Piscine orthoreovirus (PRV) is ubiquitous in farmed Atlantic salmon (Salmo salar) and the cause of heart and skeletal muscle inflammation (HSMI). PRV is an orthoreovirus in the family Reoviridae and shows several similarities ... -
Molecular studies of Yersinia ruckeri in Norwegian aquaculture
(PhD thesis;2022:66, Doctoral thesis, 2022)Yersinia ruckeri is the causative agent of yersinosis in fish, a haemorrhagic septicaemia occurring predominantly in farmed species of salmonids. In Norway, yersiniosis has been regarded as a regionally limited disease of ... -
Monitoring fish health : a vital part of salmon farming management
(PhD Thesis;2023:4, Doctoral thesis, 2023)Mortality represents a major challenge in the salmon farming industry. In Norway the mortality in the marine phase of the salmon production cycle has been 15-20% annually the recent years. This situation is not sustainable ... -
Monitoring of drug resistance and resistance development mechanisms in salmon lice (Lepeophtheirus salmonis)
(PhD Thesis;2015:44, Doctoral thesis, 2017-07-13)The parasite salmon louse (Lepeophtheirus salmonis) poses a threat to the salmonid aquaculture in the Northern Hemisphere. Depending on the developmental stage and the abundance of lice, these parasites can cause stress, ... -
Nanoparticle based vaccine delivery of recombinant outer membrane proteins and characterization of Aeromonas hydrophila and Edwardsiella species in Asian Aquaculture
(PhD Thesis;2019:50, Doctoral thesis, 2019)Akvakultur startet i Asia og i dag produseres mer enn to tredjedeler av den globale produksjonen i denne regionen. Bærekraftig utvikling av intensiv akvakultur utfordres av sykdom som hovedsakelig skyldes bakterielle ...