Blar i Faculty of Biosciences (BioVit) på forfatter "Øverland, Margareth"
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Antarctic krill (Euphausia superba) as a feed ingredient for salmonids with focus on the shell fraction and fluoride
Hansen, Jon Øvrum (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 ... -
Can fish grow on trees? Nutritional and functional properties of yeasts in diets for Atlantic salmon (Salmo salar)
Agboola, Jeleel Opeyemi (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 ... -
The effect of black soldier fly (Hermetia illucens) larvae fractions in diets for Atlantic salmon (Salmo salar) on extruder parameters, pellet quality, growth performance and nutrient utilization
Ghimire, Shlesha (Master thesis, 2021)This study focused on the effects of dietary inclusion of black soldier fly larvae (Hermetia illucens) fractions on extruder parameters, pellet quality, growth performance and nutrient digestibility and utilization in ... -
Effects of functional ingredients from yeast in diets for Atlantic salmon (Salmo salar), from two genetic backgrounds, on growth performance and nutrient utilization
Lund, Reidun (Master thesis, 2021)The overall aim of this thesis was to determine effects of functional ingredients in diets for Atlantic salmon, extracted from non- saccharomyces yeast, on growth performance and feed utilization. A 13 week (7 weeks in ... -
Effects of the downstream processing of yeast on the gastrointestinal health of Atlantic salmon during seawater transfer
Mensah, Dominic Duncan (Master thesis, 2021)Aquaculture intensification and sustainability concerns have prompted research into new feed ingredients, notably microbial ingredients such as yeast. Cyberlindnera jadinii (CJ) and Wickerhamomyces anomalus (WA) are among ... -
Evaluating retch wire screen as a new tool for feces collection in digestibility assessment in fish: the impact of nutrient leaching on apparent digestibility of fishmeal, soybean meal and rapeseed meal diets in rainbow trout (Oncorhynchus mykiss)
Shomorin, Oluwaseun George (Master thesis, 2017)The study was carried out to evaluate the retch wire screen as a potential tool for collecting feces from water, by comparing its apparent digestibility estimates with that of the conventional stripping method. The retch ... -
Feed intake, nutrient digestibility, growth performance and general health of piglets fed increasing levels of yeast
Håkenåsen, Ingrid Marie (Master thesis, 2017)In Norway, the climatic conditions and limited agricultural area impedes production of protein-rich plant-feedstuff, leading to the current dependency of import of soybeans. Norway has large forest areas, which constitute ... -
Filamentous fungi (Paecilomyces variotii) as an alternative sustainable ingredient in diets for Atlantic salmon (Salmo salar) : effects on pellet quality, growth performance, nutrient digestibility and utilization, and immune-related biomarkers in the distal intestine during the freshwater phase.
Javed, Sana (Master thesis, 2023)Filamentous fungi (FF) are promising microbial ingredients (MI) for use in aquaculture feeds due to their high protein content and bioactive components with potential health beneficial effects. This study aimed to assess ... -
Hydrolysis of Atlantic salmon (Salmo salar) rest raw materials : influence of process conditions and evaluation of hydrolysate in diets for broiler chickens and piglets
Opheim, Margareth (PhD Thesis;2015:85, Doctoral thesis, 2018-04-25)Annually Norway produces 1.3 million tons of Atlantic salmon and the levels of production are still rising. After withdrawal of eviscerated fish and filet, 336 000 tons of rest raw material are available for further ... -
Improved nutritional value of fish feed with plant protein ingredients by means of organic acid salts and solid state fermentation
Gao, Youling (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 ... -
Interactive effects of dietary and environmental challenges on digestive function and intestinal homeostasis in rainbow trout (Oncorhynchus mykiss)
Tanha, Peyman Mosberian (PhD Thesis;2016:82, Doctoral thesis, 2016)Aquaculture is challenged by various dietary and environmental factors. A widely debated and studied dietary challenge is the inclusion of plant ingredients containing anti-nutritional factors (ANFs) in salmonids diet. ... -
A multi-disciplinary approach using growth performance, gut microbiome, and behaviour to characterise and optimise the impact of dietary protein supply for Atlantic salmon (Salmo salar) aquaculture
Leeper, Alexandra (PhD thesis;2021:90, Doctoral thesis, 2021) -
Novel functional feed based on bioactive compounds from spruce tree (Picea abies) and their beneficial health effects on distal intestine of Atlantic salmon
Okbayohanese, Dawit Teklay (Master thesis, 2022)Aquaculture is an important industry that has the potential to stimulate economical growth, create jobs and assisting in poverty alleviation. However, the rapid growth and intensification of this sector has raised concerns ... -
Novel functional ingredients containing yeast cell wall components modulate molecular biomarkers in Atlantic salmon (Salmo salar) when exposed to acute hypoxic stress.
Gaudhaman, Ashwath (Master thesis, 2021)Aquaculture is a continuously expanding global industry, however, some of the major problems associated with intensive fish farming are acute and chronic stressful conditions such as handling, sub-optimal nutrition, ... -
Novel indicator traits for individual feed efficiency in Atlantic salmon (Salmo salar)
Dvergedal, Hanne (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 ... -
Novel protein sources in diets for weaned piglets – effect on growth performance, gut function, and health
Håkenåsen, Ingrid Marie (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, ... -
Nutritional, health, and technical properties of black soldier fly (Hermetia illucens) in Atlantic salmon (Salmo salar) feeds
Weththasinghe, Pabodha (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 ... -
Optimal use of plant protein concentrates in extruded feeds for carnivorous fish
Zhang, Yuexing (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 ... -
Rapeseed co-products in pig diets : effects on nutrient and energy digestibility and metabolism
Perez de Nanclares Fernandez, Marta (PhD Thesis;2017:90, Doctoral thesis, 2017)The European pig industry is heavily dependent on imported protein feedstuffs, particularly soybean meal (SBM). Increased and more efficient use of locally produced protein sources, such as rapeseed (RS), could alleviate ... -
Starch digestion dynamics in broiler chickens as affected by structural components, starch properties and level of inclusion
Itani, Khaled (PhD Thesis;2019: 57, Doctoral thesis, 2019)Quantitatively, starch is the most important component and the major energy source in poultry diets. Although it is commonly believed that the broiler chicken has a large capacity to digest starch, numerous studies have ...