Doctoral theses (BioVit): Recent submissions
Now showing items 21-40 of 75
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The effect of freezing and thawing on water flow and pesticide leaching in partially frozen soil: Soil column experiments and model development
(;2019:20, Doctoral thesis, 2019)Increased pesticide concentrations have often been detected in soil leachate, drain discharge and surface runoff during freeze/thaw periods in late winter and early spring, both in Norway and Sweden. Limited knowledge and ... -
The genetics of omega-3 fatty acids in fillets of Atlantic salmon (Salmo salar L.)
(Doctoral thesis, 2019)Decreasing contents of the omega-3 fatty acids EPA and DHA in farmed Atlantic salmon reduces the nutritional value for consumers and influences physiological processes in the fish. Most studies of physiological omega-3 ... -
Ecological effects of Cytisus scoparius invasion : a native or alien species?
(PhD Thesis;2019:31, Doctoral thesis, 2019)The number of alien invasive species is continually increasing, threatening the environment and economy and their management is challenging. For cases of cryptic invasions, it is not even known if a species is native or ... -
Whole-farm modelling of greenhouse gas emissions from suckler cow beef production
(PhD Thesis;2019:93, Doctoral thesis, 2019)The main objective of this thesis was to develop a whole-farm model adapted to the various production systems and natural resources in Norway, estimate the level and variation in greenhouse gas (GHG) emission intensities ... -
Yeast (Cyberlindnera jadinii): an alternative protein source in pig and poultry feed
(PhD Thesis;2019:87, Doctoral thesis, 2019)The demand for food protein sources continues to increase rapidly along with the World population. Consequently, the European livestock industry requires a growing supply of feed protein to meet these demands. Furthermore, ... -
Towards a genome wide understanding of salmon lipid metabolism gene regulation across tissues and life stages
(PhD Thesis;2019:40, Doctoral thesis, 2019)Atlantic salmon is an important source of essential omega-3 fatty acids in human diets; however, omega-3 content in farmed salmon has been decreasing over the past decade due to the replacement of fish oil in aquafeeds ... -
Genomic prediction using high-density and whole-genome sequence genotypes
(Phd Thesis;2022:33, Doctoral thesis, 2022)The main objective of this thesis was to investigate genomic prediction methods for high-density and whole-genome sequence genotypes, with emphasis on traits that may have difficulties achieving a high prediction accuracy ... -
Can fish grow on trees? Nutritional and functional properties of yeasts in diets for Atlantic salmon (Salmo salar)
(Phd Thesis;2022:11, Doctoral thesis, 2022)Yeasts are gaining attention as alternative ingredients in fish feeds. The nutritional and health potentials of non-saccharomyces yeasts in fish are scarce in literature. Three non-saccharomyces yeasts; Cyberlindnera jadinii ... -
Genetic variation in recombination rates and genetic shuffling in pigs, cattle and Atlantic salmon
(PhD Thesis;2022:17, Doctoral thesis, 2022)Meiotic recombination ensures proper segregation of homologues chromosomes in meiosis while also breaking down linkage disequilibrium and creating novel haplotypes by shuffling alleles of genes located on the same chromosome. ... -
Novel indicator traits for individual feed efficiency in Atlantic salmon (Salmo salar)
(PhD Thesis;2019:02, Doctoral thesis, 2019)Selective breeding for enhanced feed efficiency in aquaculture production has so far been performed indirectly, largely through selection for an improved growth rate. However, a substantial fraction of the genetic variation ... -
Epigenetic and genetic adaptation in experimental yeast populations
(PhD Thesis;2019:23, Doctoral thesis, 2019)Evolution is a highly complex process where life change over time by the influence of relatively simple forces. Bringing evolution into the lab is a valuable asset to answer questions about processes that shape evolution. ... -
Carbohydrate digestion in horses : methods, processing, and future perspectives
(PhD Thesis;2022:7, Doctoral thesis, 2022)Understanding the digestion of nutrients in different segments of the gastro-intestinal tract of horses is important for correct feed evaluation. This thesis aimed to examine starch and fibre digestion and fermentation in ... -
Plant-parasitic nematodes of the Ethiopian food security crop enset (Ensete ventricosum) : occurrence, distribution, characterisation and management
(PhD Thesis;2021:32, Doctoral thesis, 2021)To confront the challenges of eradicating hunger and improve food security, agricultural growth needs to be driven by intensification. This in turn increases the threat of pests and diseases, including plant-parasitic ... -
Genomics exploring population structure and sex determination in Atlantic cod (Gadus morhua)
(PhD Thesis;2019:102, Doctoral thesis, 2019)Atlantic cod (Gadus morhua) is a benthopelagic cold-water marine species found across the North Atlantic Ocean. Thanks to its historical and current significance as an important food resource it is one of the most well-known ... -
Breeding for disease resistance against Edwardsiella ictaluri in Mekong striped catfish (Pangasianodon hypophthalmus)
(PhD Thesis;2020:77, Doctoral thesis, 2020)Bacillary necrosis (BN) is a disease caused by Edwardsiella ictaluri (E. ictaluri) that results in severe economic losses in farming of Mekong striped catfish (Pangasianodon hypophthalmus) in Vietnam. Genetic selection ... -
Breeding for Milk Production in Sheep in Ethiopia
(Phd Thesis;2021:34, Doctoral thesis, 2021)The overall aim of this study was to investigate options to breed sheep for milk production and to find out the optimal proportion of Awassi in Local sheep breeds for milk production through the prevailing Community-Based ... -
Genetic studies of the wheat-Parastagonospora nodorum pathosystem
(PhD Thesis;2020:21, Doctoral thesis, 2020)Septoria nodorum blotch (SNB) caused by the necrotrophic fungus Parastagonospora nodorum is the major wheat leaf blotch disease in Norway. It reduces both yield and grain quality by causing symptoms on wheat leaves and ... -
Alternative systems for Norwegian sheep production: extending fresh meat season and meeting niche market demands
(Phd Thesis;2020:49, Doctoral thesis, 2020)Norway has the largest sheep population (>1 million winterfed ewes) in Scandinavia. Sheep farming is taken as a part-time activity by most farmers. The focus of this PhD study has been on increasing year-round fresh meat ... -
Genetic analyses of semen characteristics in Norwegian Red
(PhD Thesis;2021:62, Doctoral thesis, 2021)The research on the genetics of bull fertility is limited, many studies are old, estimates are often based on few observations or few bulls, and with large or lacking standard errors. With more than 20 years of data on ...