Blar i Doctoral theses (BioVit) på utgivelsesdato
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The neural basis of threat-sensitive behaviour in fish
(PhD Thesis;2015:6, Doctoral thesis, 2020-11-10)Fear, or threat-sensitive behaviour, is an emotionally guided response allowing animals to minimize exposure to potential danger. Stress is a set of physiological/behavioural responses to such exposure. Among other ... -
Improved starch and protein utilization by extruded feed pellets targeted to benefit dynamics of rumen digestion in dairy cows
(PhD Thesis;2021:15, Doctoral thesis, 2021)To meet their requirements for energy and amino acids, high-producing dairy cows are fed compound feeds containing high amounts of starch and protein. Optimal utilization of these high-quality feeds is critical, where the ... -
Identification of photoreceptors with functional characterization of photolyase in Pseudoidium neolycopersici
(PhD Thesis;2021:72, Doctoral thesis, 2021)Powdery mildew caused by Pseudoidium neolycopersici is one of the most destructive diseases, occurring predominantly on greenhouse grown tomatoes, and has gained importance worldwide due to severe economic losses in terms ... -
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 ... -
Supplying dairy cows with Propionibacterium to reduce enteric methane emission
(PhD Thesis;2021:16, Doctoral thesis, 2021)The primary target of this research was to explore the ability of promising propionibacteria strains to reduce the enteric methane emission from dairy cows. The second objective was to study the effect of propionibacteria ... -
Genomic methods in breeding programs: Parental assignment, triploid genomics and case-parental control modelling
(Phd Thesis;2021:7, Doctoral thesis, 2021)The use of high-density single nucleotide polymorphism (SNP) genotypes enables us to perform highly accurate parentage assignment. However, dependence between loci often results in using a subset of the data to obtain ... -
Nutritional, health, and technical properties of black soldier fly (Hermetia illucens) in Atlantic salmon (Salmo salar) feeds
(PhD Thesis;2021:79, Doctoral thesis, 2021)Black soldier fly (BSF) (Hermetia illucens) has been identified as a promising novel ingredient in fish feeds. The knowledge on optimal downstream processing of BSF is, however, lacking in the literature. The main objective ... -
A new approach for predicting milk production responses and feed utilization in dairy cows
(Doctoral thesis, 2021)Feed evaluation systems (FESs), such as the Nordic Feed Evaluation System (NorFor), aim to help dairy producers compare the nutritive value of various types of feed, formulate of balanced diets, and predict animal performance ... -
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 ... -
Supplying dairy cows with Propionibacterium to reduce enteric methane emission
(PhD thesis;2021:16, Doctoral thesis, 2021)The primary target of this research was to explore the ability of promising propionibacteria strains to reduce the enteric methane emission from dairy cows. The second objective was to study the effect of propionibacteria ... -
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 ... -
Quantitative genetics of growth rate and carcass quality traits in Atlantic salmon
(Phd Thesis;2021:39, Doctoral thesis, 2021-05-06)Quantitative genetic parameters of quality traits and growth rate in Atlantic salmon are commonly recorded at a target average market body weight (4-5 kg) at which the individuals are at the same age, which is less labour ... -
Reproductive and Genetic Studies in Large Yellow Croaker
(Doctoral thesis, 2021-12-15)Large yellow croaker (Larimichthys crocea) is distributed in the coastal regions of East Asia and is one of the most important marine aquaculture species in China. However, due to overfishing, it has been difficult to ... -
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 ... -
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. ... -
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 ... -
Novel protein sources in diets for weaned piglets – effect on growth performance, gut function, and health
(PhD Thesis;2022:50, Doctoral thesis, 2022)The world is facing a growing food demand from an ever-increasing population. To meet this challenge, new resources must be utilized through innovative solutions. Meat is a valuable protein source in the human diet. However, ... -
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 ... -
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 ...