Browsing Doctoral theses (BioVit) by Title
Now showing items 1-20 of 75
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Abscission in poinsettia, a methodology and –omics approach
(PhD Thesis;2018:39, Doctoral thesis, 2018)Plants detach organs in a highly controlled process called abscission. Leaves, flowers, seeds, fruits, berries and even roots abscise from the plant in response to pathogens or environmental and developmental stimuli. The ... -
Alleles of adaptive importance for barley cultivation in a subarctic climate / Magnus Göransson
(PhD thesis;2023:51, Doctoral thesis, 2023)Barley is the most grown cereal in the Nordic countries, and the fourth most important cereal crop globally. Its use is mainly for feed, but a large portion is also used by the brewing industry. At northern latitudes, such ... -
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 ... -
Assessing personality traits in dogs : conceptual and methodological issues
(PhD Thesis;2017:72, Doctoral thesis, 2017)Animal personality is defined by consistent between-individual differences in behaviour through time or across contexts. Behaviour is further organised into broader behavioural dimensions referred to as personality traits ... -
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 ... -
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 ... -
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 ... -
Characterization of genes and proteins related to chitin metabolism in Atlantic salmon
(PhD Thesis;2022:46, Doctoral thesis, 2022)Chitin is an insoluble polysaccharide and important component in the extracellular matrix of invertebrates such as arthropods, algae, and fungi. In vertebrates, the role and significance of chitin have not been deeply ... -
Characterization of genes and gene products influencing carotenoid metabolism in Atlantic salmon
(PhD Thesis;2017:36, Doctoral thesis, 2017)Distinct red flesh color is a unique trait of the fish genera Oncorhynchus, Salvelinus, Salmo and Parahucho. In this thesis we have investigated its molecular basis in Atlantic salmon to better understand how and why it ... -
Choosy chicks : chicken life quality is a matter of choices
(PhD Thesis;2023:82, Doctoral thesis, 2023) -
The contribution of repetitive elements to salmonid genome evolution
(Phd Thesis;2022:72, Doctoral thesis, 2022)Eukaryotic genomes typically consist of a substantial proportion of repetitive DNA in the form of transposable elements (TEs) and satellite DNA. From studies of mammals, model species, and a few other well studied lineages ... -
Cow-calf contact in dairy farming : Norwegian cowcalf contact (CCC) farmers’ practice and perceptions, and effects of CCC on behavior and performance on pasture
(PhD Thesis;2023:78, Doctoral thesis, 2024)The separation of cow and calf within the first day after calving is common practice in dairy farming, but cow-calf contact (CCC) systems are receiving increased attention from different stakeholders. This interest is ... -
Dynamic dietary salmon farming in the Faroe Islands with regards to production, quality and economic improvements
(PhD Thesis;2018:104, Doctoral thesis, 2018)The development of feeds for Atlantic salmon has been an ongoing process since the industry started in the 1970s. In the early years, salmon feeds had higher share of proteins than lipids, but after the introduction of ... -
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 ... -
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 ... -
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. ... -
Establishment of a base population for long-term genetic improvement of Nile tilapia in Ethiopia
(PhD Thesis;2019:8, Doctoral thesis, 2019)The success of genetic improvement obtained in fish breeding programs depends on the genetic diversity of the founder populations and how the base population is constructed, as they influence the genetic variation of the ... -
Evolution of flowering adaptations in temperate grasses
(PhD Thesis;2023:64, Doctoral thesis, 2023)Grasses (Poaceae) represent an unparalleled evolutionary success story and are particularly well adapted to the environmental challenges posed by temperate habitats. Crucial to their evolutionary success in temperate ... -
Focal dark spots in the skeletal muscle of Atlantic salmon : involvement of rib abnormalities, environmental factors, and local immune responses
(PhD Thesis;2023:67, Doctoral thesis, 2023)Focal dark spots (DS) represent a major fillet quality issue, leading to significant economic losses in farmed Atlantic salmon (Salmo salar L.). DS typically appear as discoloured red/black areas in the anterior hypaxial ...