Browsing Department of Biological Sciences by Title
Now showing items 7-26 of 2484
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A Comparative Study of the Spawning Phenology of Cod (Gadus morhua), Saithe (Pollachius virens), and Haddock (Melanogrammus aeglefinus): a Geographical Perspective along the Norwegian Coast
(Master thesis, 2023-06-02)Reproductive traits are a fundamental aspect of an organism's life history and play a critical role in shaping population dynamics, as these traits can significantly influence offspring survival rates and, thereby, ... -
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 Modeling Study of Behavior and Sampling Bias Introduced by Artificial Light on Marine Organisms During the Polar Night
(Master thesis, 2023-06-02) -
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 autophagy gene expression in autoimmune Addison's disease
(Master thesis, 2022-06-01) -
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. ... -
Abrupt change in tropical Pacific climate mean state during the Little Ice Age
(Journal article; Peer reviewed, 2023)The mean state of the tropical Pacific ocean-atmosphere climate, in particular its east-west asymmetry, has profound consequences for regional climates and for the El Niño/Southern Oscillation variability. Here we present ... -
Acacia trees on the cultural landscapes of the Red Sea Hills
(Peer reviewed; Journal article, 2014-07-18)This paper examines interactions between five pastoral nomadic culture groups of the Egyptian and Sudanese Red Sea Hills and the acacia trees Acacia tortilis (Forssk.) Hayne subsp. tortilis and subsp. raddiana growing in ... -
Accumulation and distribution of microplastics in coastal sediments from the inner Oslofjord, Norway
(Journal article; Peer reviewed, 2021)Microplastic presence in benthic marine systems is a widely discussed topic. The influence of the natural matrix on microplastic distribution within the sedimentary matrix is often overlooked. Marine sediments from the ... -
Acoustic attenuation by air bubble in bad weather conditions; a comparison of hull- and keel-mounted transducers
(Master thesis, 2009-08-25)Echo integration in bad weather conditions is problematic due to vessel- and wind-induced air bubble layer that is formed below the hull of a vessel, where acoustic transducers are mounted. The bubbles below the hull ... -
Acoustic Delicing of Atlantic Salmon (Salmo salar): Fish Welfare and Salmon Lice (Lepeophtheirus salmonis) Dynamics
(Journal article; Peer reviewed, 2022)Acoustic lice treatment (AcuLice) is a newly developed system, which uses a composite acoustic sound image with low-frequency sound to remove salmon lice (Lepeophtheirus salmonis) from Atlantic salmon (Salmo salar). This ...