Browsing Master theses by Subject "751999"
Now showing items 1-20 of 129
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A comparison of egg investment in lesser black-backed gulls (Larus fuscus) from urban and non-urban colonies
(Master thesis, 2021-06-01)While the increasing worldwide urbanization generally has negative effects on biodiversity, some animals, like roof nesting gulls, are able to take advantage of these areas and have generated large populations in a number ... -
A comparison of the spatial ecology, trophic ecology, and hypoxia tolerance of Velvet belly lanternshark (Etmopterus spinax) and Blackmouth catshark (Galeus melastomus) in Norwegian fjords.
(Master thesis, 2022-06-01)Climate change and ocean warming are major drivers of deoxygenation in the ocean, and the effects of oxygen loss are more pronounced in fjords due to the basic fjord topography. Velvet belly lanternshark (Etmopterus spinax) ... -
A deeper look; Does Heincke´s law apply to Atlantic cod (Gadus morhua) in the Barents Sea and what is the effect of eye size on prey encounter rate?
(Master thesis, 2019-05-28)The Atlantic cod (Gadus morhua) is arguably one of the most valuable fish we have, and the Barents Sea stock, Northeast Arctic cod (NEAC), is the largest stock in the world. Despite the long history of fishing and the ... -
A descriptive analysis of data from the Norwegian Coastal Reference Fleet and comparison with catch-per-unit-effort data from research surveys
(Master thesis, 2021-03-22)Catch quotas are used for the sustainable management of fish stocks and are based on official catch statistics and research surveys. However, these methods provide only partial information, as the official catch data does, ... -
A faunistic study of the amphipod-fauna of Hjeltefjord, West-Norway
(Master thesis, 2019-06-26)Amphipods are a large and highly diverse order of benthic invertebrates. Their great variety in habitat selection, morphology, geographical range and feeding strategies makes them an important ecological group in marine ... -
A Field Study on the Effects of Norwegian Aquaculture Farms on the Intertidal Rocky Shore Community
(Master thesis, 2021-09-13)The aquaculture industry has more than doubled since the early 2000s, and the growth is not predicted to stagnate any time soon. Norwegian salmonid aquaculture cages are usually open where waste is flushed from the cage ... -
A pilot study of lumpfish (Cyclopterus lumpus) skin health, reared with three different treatments in land-based facilities and commercial net-pens
(Master thesis, 2021-06-01)Biological delousing by the means of deploying cleanerfish is one of the methods applied in Atlantic salmon aquaculture to combat the sea lice (lepeophtheirus salmonis) infestation problem. The method is based on the natural ... -
A study of two morphotypes of the brown algae Fucus serratus (Linnaeus) at Tjongspollen, Bømlo, Norway
(Master thesis, 2019-07-04)Abstract The genus Fucus contains several key forming species occupying rocky shores in the Northern Hemisphere. Fucus is known to have a great capacity for phenotypic plasticity and ability to expand in to marginal habitats. ... -
Applying fisheries data from the Norwegian reference fleet to study the demersal biodiversity and fisheries dynamics in two coastal areas
(Master thesis, 2019-06-05)It is well established that biodiversity varies throughout the year, over many years and between areas, and that biodiversity plays an important role in the overall health and resilience of an ecosystem. As fisheries ... -
Are migration timing estimates based on tagged Atlantic salmon smolts (Salmo salar) biased?
(Master thesis, 2020-06-20)Telemetry tags (e.g. PIT- or acoustic tags) are increasingly used in management to monitor the migration timing of Atlantic salmon smolts (Salmo salar). Recent findings, however, suggest that tagged fish consistently migrate ... -
Avfallsvann som et alternativt dyrkingsmedium for mikroalger med et høyt innhold av EPA og DHA
(Master thesis, 2020-07-02)Mikroalger har mulighet til å danne flere ulike komponenter av kommersiell verdi. Av spesielt stor interesse er deres innhold av de flerumettede fettsyrene eikosapentaensyre (EPA) og dokosaheksaensyre (DHA). Disse fettsyrene ... -
Biologilærarar sine kunnskapar om arbeidsminnet
(Master thesis, 2022-06-01)Arbeidsminnet er ein funksjon i hjernen for å mentalt manipulere informasjon. Arbeidsminnet har avgrensa kapasitet og varigheit, noko som er sentralt i undervisningssamanheng fordi det påverkar elevar sine evner til å ... -
Breakdown of keratin-laden biomass waste by the thermophilic bacterium Fervidobacterium pennivorans strain T
(Master thesis, 2020-06-30)Developing a more sustainable agro-industry has become a necessity in light of the current environmental crisis. Biocatalysts are already adopted in many industrial applications and have quickly optimized, and in some cases ... -
Caligus elongatus and Lepeophtheirus salmonis infestation on farmed and wild fish.
(Master thesis, 2022-02-07) -
Can catch data from small meshed gears in shallow waters be used to estimate recruitment indices of Norwegian coastal cod, Northeast Arctic saithe and pollack along the Norwegian coast?
(Master thesis, 2019-06-21)Shallow waters (<30 meters) are important nursery areas for coastal cod, saithe and pollack, before they recruit to their respective fisheries at an age around 3 years old. Still, no study provides information on fish ... -
Can environmental toxins increase parasite fitness? Ecotoxicological studies on the effects of microcystin on the host-parasite dynamics of Schistocephalus solidus
(Master thesis, 2020-08-21)Background: Eutrophication of aquatic biomes and exacerbated climate change effects are expected to result in a global increase in harmful cyanobacterial blooms. Cyanotoxins are detrimental to animal health, but how they ...