Blar i Faculty of Biosciences (BioVit) på utgivelsesdato
Viser treff 41-60 av 1078
-
Variation at early life stages of Atlantic salmon : relationships between emergence time and stress coping styles
(PhD Thesis;2011:08, Doctoral thesis, 2011)Captive fish are exposed to a variety of stressful situations, which can affect growth rates and promote diseases. Identification and selection for stress resistant fish at early stages of the production cycle could be ... -
A quantitative genetic study on the proportion of males in tilapia
(PhD Thesis;2011:63, Doctoral thesis, 2011)Early sexual maturation is one the main constraints in Tilapia farming since early breeding causes stunted growth and large size variability. To circumvent this problem all-male populations are used commercially, and ... -
Effect of cobalt on fatty acid composition in milk of dairy cows and sows
(PhD Thesis;2011:75, Doctoral thesis, 2011)Previous research revealed that supplementing excess cobalt (Co) reduces bovine milk content of monounsaturated fatty acids (MUFAs), probably mediated by the enzyme Δ9 -desaturase. The general aim of this research project ... -
Genetic analyses of meat, fat and carcass quality traits measured by rapid methods
(PhD Thesis;2011:13, Doctoral thesis, 2011)The overall aim of this thesis was to analyse meat and fat quality traits using quantitative genetic methods. This study has demonstrated that it is possible to establish simple laboratory practices and high quality rapid ... -
Improved nutritional value of fish feed with plant protein ingredients by means of organic acid salts and solid state fermentation
(PhD Thesis;2011:23, Doctoral thesis, 2011)The objective of this work was to improve the nutritional value of plant protein sources to be used in fish feed by means of organic acid salts and solid state fermentation (SSF). Four studies were conducted to determine ... -
Tick-borne fever in sheep : production loss and preventive measures
(PhD Thesis;2011:32, Doctoral thesis, 2011)A major challenge in sheep farming during the grazing season along the coast of southwestern Norway is tick-borne fever (TBF) caused by the bacteria Anaplasma phagocytophilum, that is transmitted by the tick Ixodes ricinus. ... -
The influence og dietary fatty acid composition and sex on pork quality
(PhD Thesis;2011:04, Doctoral thesis, 2011)Norway is an important fish catching and producing country and has traditionally used fish and fish by-products in feed for monogastric animals, the pig is no exception. Fish and fish by products are excellent sources of ... -
Genetic variation and management of the Norwegian horse breeds
(PhD Thesis;2011:05, Doctoral thesis, 2011)The Norwegian horse breeds suffer from strong competition in the market from imported, specialized breeds. Decreasing population sizes, especially for the Fjord, the Døle and the Nordland/Lyngen, and risk of rapid accumulation ... -
Quantitative genetics of traits related to disease resistance and effects of vaccination in Atlantic salmon (Salmo salar)
(PhD Thesis;2011:39, Doctoral thesis, 2011)Disease resistance is of major importance to the fish farming industry as disease outbreaks have negative effects on the industry’s economy, its reputation and on fish welfare. Today, almost all fish in the Norwegian salmon ... -
Antarctic krill (Euphausia superba) as a feed ingredient for salmonids with focus on the shell fraction and fluoride
(PhD Thesis;2011:21, Doctoral thesis, 2011)Antarctic krill (Euphausia superba) may be the largest biomass of a single species worldwide and is a promising ingredient for use in fish feeds. Krill have a balanced amino acid profile, and krill lipids are rich in ... -
Optimal use of plant protein concentrates in extruded feeds for carnivorous fish
(PhD Thesis;2011:53, Doctoral thesis, 2011)The main objective of the research presented in this thesis was to evaluate multiple amino acidsupplemented plant protein concentrates as the main protein source in diets for carnivorous fish. This objective was approached ... -
Winter hardiness and management of velvet bentgrass (Agrostis canina) on golf greens in the Nordic climate
(PhD Thesis;2011:14, Doctoral thesis, 2011)Major concerns for the introduction of velvet bentgrass (Agrostis canina) on Nordic golf courses are whether current cultivars have sufficient winter hardiness, and if it is possible to control the rapid thatch formation ... -
Partial resistance to Fusarium head blight and powdery mildew in wheat
(PhD Thesis;2011:66, Doctoral thesis, 2011)Both Fusarium head blight and powdery mildew are devastating diseases in wheat growing areas around the world. Breeding for resistance has been undergoing for many decades and mostly depends on phenotypic selection. Marker ... -
Molecular studies of Atlantic cod (Gadus morhua) globin genes – functional effects of hemoglobin polymorphisms and their geographical distribution
(PhD Thesis;2011:56, Doctoral thesis, 2011)The phenotypic variation among Atlantic cod hemoglobins and their physiological properties has been of great interest to researchers for several decades, and many cod stocks have been “genotyped” according to the HbI ... -
Farm animal-assisted interventions in clinical depression
(PhD Thesis;2011:25, Doctoral thesis, 2011)Depression affects millions of people every year. Depressed individuals suffer from depressed mood, loss of interest and enjoyment, reduced energy, diminished activity, reduced attention and concentration and reduced ... -
Upgrading plant ingredients in feed for salmonids by thermo-mechanical treatment and acid salts
(PhD Thesis;2011:52, Doctoral thesis, 2011)Inclusion of plant ingredients in diets for salmonids is restricted due to low energy contents, unbalanced amino acid (AA) composition and presence of antinutritional factors (ANF). The objective of this thesis was to ... -
Stress responsiveness in salmonids : effects on genes, organs, and organisms
(PhD Thesis;2011:06, Doctoral thesis, 2011)Stress is an inescapable burden for fish like for all other animals. For individuals that frequently encounter stressful situations, repeated or prolonged physiological stress responses, can potentially compromise the ... -
The effect of pancreas disease and salting conditions on the quality of raw and cold-smoked Atlantic salmon (Salmo salar L.)
(PhD Thesis;2011:07, Doctoral thesis, 2011)Fillet quality of farmed Atlantic salmon (Salmo salar L.) is affected by a broad range of preand post-mortem factors. This thesis focuses mainly on the impact of pancreas disease (PD), salt composition and salting method ... -
Designing the optimal free stall for dairy cows : effects of free-stall design on cleanliness, milk yield, health, and behaviour
(PhD Thesis;2011:42, Doctoral thesis, 2011)Liggebåsens utforming er av stor betydning for blant annet hygiene og kuenes atferd i et løsdriftfjøs ettersom kua tilbringer hoveddelen av tida si her, hovedsakelig liggende men også stående i båsen. For å unngå at kua ... -
Effekt av botanisk sammensetning av surfôr på metanproduksjon hos melkekyr
(Master thesis, 2011-02-15)Sammendrag Formålet med oppgaven var å se på effekten av botanisk sammensetning i surfôr på metanproduksjon hos melkekyr. Dette ble gjort som en del av et PhD studie og det var markørmetoden SF6 som ble brukt for å måle ...