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(Master thesis / Masteroppgave, 2023)
The euphausiid Meganyctiphanes norvegica performs diel vertical migrations (DVMs), staying in deeper waters during the day and ascending to the shallows at night. This behaviour is interpreted as a trade-off between food ...
(Master thesis / Masteroppgave, 2023)
(Master thesis / Masteroppgave, 2023)
Harmful algal blooms can be devastating to local ecosystems as well as have major impacts on economy and aquaculture. Chrysochromulina leadbeateri caused the death of an estimated seven and a half million farmed salmon in ...
(Master thesis / Masteroppgave, 2023)
(Master thesis / Masteroppgave, 2023)
(Master thesis / Masteroppgave, 2023)
According to the Norwegian Flora (Elven et al. 2022), we have three accepted species of eelgrass in Norway: Zostera marina L. (eelgrass, ålegras), Z. noltii Hornem. (dwarf eelgrass, dverg- ålegras), and Z. angustifolia (Hornem.) ...
(Master thesis / Masteroppgave, 2023)
(Master thesis / Masteroppgave, 2023)
Oppblomstringer av kalkflagellater utgjør et viktig fundament for næringskjeden i Barentshavet. Fjernanalyse med satellittbilder har de siste tiårene dokumentert at denne oppblomstringen beveger seg nordover i takt med ...
(Master thesis / Masteroppgave, 2023)
The Hardangerfjord has a high density of harbour porpoises, making it stand out among Norwegian fjords as a particularly important habitat. A new predator-prey relationship emerged in 2017, with killer whales entering the ...
(Master thesis / Masteroppgave, 2023)
While invasive species obtain widespread attention for their ecological implications, the earlier stages of their invasion usually remain as uncharted territory. Procambarus clarkii is well known for being one of the most ...
(Master thesis / Masteroppgave, 2023)
The European eel has a complex life history. They are widely distributed in Europe and northern Africa, but panmictic, meaning that co-management across the entire distributional range is of vital importance. In Norway, ...
(Master thesis / Masteroppgave, 2023)
(Master thesis / Masteroppgave, 2023)
(Master thesis / Masteroppgave, 2023)
Several months of darkness during polar night impose unique challenges on polar phototrophic organisms, whereby solar energy capture via plastid-based photosystems remains unattainable for an extended period of time. ...
(Master thesis / Masteroppgave, 2023)
(Master thesis / Masteroppgave, 2023)
(Master thesis / Masteroppgave, 2023)
In this study I compared the detection sensitivity of qPCR and DNA-metabarcoding for lamprey in 45 locations, with two samples collected from each location. I compared if the samples were positive or negative for lamprey ...
(Master thesis / Masteroppgave, 2023)
(Master thesis / Masteroppgave, 2022)
Each year large numbers of escaped farmed salmon migrate in Norwegian rivers and some partake in spawning. Offspring with varying degrees of domestication inhabit river systems together with wild conspecifics. As climate ...
(Master thesis / Masteroppgave, 2022)
(Master thesis / Masteroppgave, 2022)
(Master thesis / Masteroppgave, 2022)
I denne studien ble den bentiske algevegetasjonen i Indre Oslofjord undersøkt. Hensikten var å undersøke hvordan vegetasjonen hadde endret seg siden Jon Fonnlid Larsens (1995) undersøkelser fra 1993 og 1994, og finne ut ...
(Master thesis / Masteroppgave, 2022)
I denne kvalitative oppgaven er det kartlagt hvor mange, og hvilke algearter som finnes på fire stasjoner i nordre del av Indre Oslofjord. Algenes fordeling mellom rød-, brun- og grønnalger er også undersøkt. Resultatene ...
(Master thesis / Masteroppgave, 2022)
(Master thesis / Masteroppgave, 2021)
The pelagic zone is the largest ecosystem on Earth. The inhabitants of this ecosystem are not provided with any substances to hide behind. Diel vertical migration (DVM) is believed to be a trade-off between substantial ...
(Master thesis / Masteroppgave, 2021)
I løpet av de siste ti årene har det vært rapportert en omfattende nedgang av blåskjell i Oslofjorden. Dette har blitt meldt fra både kystbefolkning og hytteeiere, men også fra forskere. Nedgangen i blåskjell er en trend ...
(Master thesis / Masteroppgave, 2021)
Behaviors of Capelin, Herring and Mackerel Before and During Capture by Purse Seine Measured with Multibeam Fisheries Sonar Restricted Access
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
Pelagic copepods are hosts to numerous protistan parasites, which can have devastating effects on host fitness. Effects of parasitism include increased mortality, behavioral modifications, sterility and death. Although ...
(Master thesis / Masteroppgave, 2021)
Karpefisken karuss (Carassius carassius) har en unik evne til å tolerere svært lave oksygennivåer, og kan leve i helt anoksiske tilstander over flere måneder under isdekke. Dens unike egenskaper innebærer en svært høy ...
(Master thesis / Masteroppgave, 2021)
Cod (Gadus morhua ) and capelin (Mallotus villosus) play an important ecological and commercial role in the Barents Sea. Capelin provide high lipid energy to many of its predators in the Barents Sea including cod, which ...
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2021)
(Master thesis / Masteroppgave, 2020)
Transatlantic studies of mesopelagic ecosystems Restricted Access
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
The presence of microplastics in the marine environment is an emerging concern for marine life. This study investigated the presence of low-density polyethylene (LDPE) particles (20-25 μm) in the gills, intestinal lumen, ...
(Master thesis / Masteroppgave, 2020)
Growth of two red algae species (Palmaria palmata and Vertebrata lanosa) in lab culture Newt Petride Master of Science Thesis Department of Biosciences Section for Aquatic Biology and Toxicology (AQUA) University of Oslo ...
(Master thesis / Masteroppgave, 2020)
Environmental changes are affecting a great number of marine ecosystems. Many top predators are particularly vulnerable to such changes as they are contingent on the various prey species along the food chain and their ...
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
Bentiske makroalger kan fortelle oss om hvordan miljøforholdene i et område har vært over en lengre periode. De er fastvoksende, og kan ikke flykte fra faktorer som økende sjøtemperatur, næringsberikelse av vannmasser eller ...
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
(Master thesis / Masteroppgave, 2020)
Plastic pollution has become a major threat to many marine ecosystems, and there is a need for an improved understanding of its impact on marine organisms. Studies have mainly focused on lower trophic levels, including ...
(Master thesis / Masteroppgave, 2020)
Økt menneskelig påvirkning på kystområder kan føre til at endringer i fysiske og biologiske miljøfaktorer skjer raskt. Slike endringer vil være utfordrende for en rekke arter tilpasset spesifikke økosystem. Marine ...
(Master thesis / Masteroppgave, 2019)
The use of remote video traps is a popular method of studying animal behavior in nature. It is an efficient, inexpensive and non-invasive way of obtaining samples from the field. In this study, I built and used video traps ...
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2019)
Bentiske alger og ålegras utgjør to viktige marine habitater langs Norges kystlinje. Bentiske diatomeer som epifytter er ofte funnet på disse. Det er ingen tidligere studier fra tempererte områder av sesongmessig variasjon ...
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2019)
(Master thesis / Masteroppgave, 2019)
The retreat of glaciers, melting of permafrost, and increased riverine runoff influence Arctic fjords and their physical and biological environment, but to which extent is poorly known. In this study, I determined the ...
(Master thesis / Masteroppgave, 2019)
Brown trout (BT) and Arctic char (AC) are freshwater species exhibiting a wide array of life history and migration strategies. Populations with free access to the marine environment often display anadromous tendencies, ...
(Master thesis / Masteroppgave, 2019)
Microplastics contaminate marine environments worldwide, but there is little knowledge of whether and how benthic foraminifera are affected. The aim of this project was to clarify whether microplastics accumulate in and ...
(Master thesis / Masteroppgave, 2019)
During the 1980`s it was discovered that fishes from the wrasse family (Labridae) along the Norwegian coast could be utilized as cleaner fish for controlling sea-lice infestations in commercial fish farming. Since this ...
(Master thesis / Masteroppgave, 2018)
(Master thesis / Masteroppgave, 2018)
(Master thesis / Masteroppgave, 2018)
Laminaria hyperborea is an important species of kelp comprising large kelp forests along the Norwegian coast. Large quantities of detritus from these forests are exported to other ecosystems. These exports could support ...
(Master thesis / Masteroppgave, 2018)
Ytre Hvaler nasjonalpark ble opprettet i 2009 for å bevare urørt natur i et marint miljø. Samtidig er nasjonalparken et viktig rekreasjonsområde for mange mennesker, og fjæresonen kan lett påvirkes av menneskelig aktivitet ...
(Master thesis / Masteroppgave, 2018)
Denne undersøkelsen har registret forekomst av makroalger og dyr på 7 utvalgte stasjoner i Ytre Hvaler nasjonalparks fjæresone, inkludert fjærepytter. Feltarbeidet ble utført over to sesonger: I april (vår) og august (høst) ...
Bryozoan Life Histories in the Arctic Marine Environment Restricted Access
(Master thesis / Masteroppgave, 2018)
(Master thesis / Masteroppgave, 2018)
At the prospect of global warming, an understanding of how increasing temperatures may affect both species and communities becomes increasingly important. In 2002, a regime shift occurred along the Norwegian Skagerrak coast ...
(Master thesis / Masteroppgave, 2018)
The responses in size, survival and other life-history traits in the cladoceran Daphnia magna were assessed at two temperatures (15 and 25ºC) across a calcium (Ca) gradient (0.5, 4 and 106 mg Ca/l) for two different clones ...
(Master thesis / Masteroppgave, 2018)
(Master thesis / Masteroppgave, 2018)
(Master thesis / Masteroppgave, 2018)
(Master thesis / Masteroppgave, 2017)
The sea urchin, Strongylocentrotus droebachiensis, is a prominent grazer in coastal ecosystems with the ability to graze down large areas of kelp forests and turn them into marine deserts, or so called barren grounds. Kelp ...
(Master thesis / Masteroppgave, 2017)
(Master thesis / Masteroppgave, 2017)
In Antarctica, the failure to establish international agreement on regulations caused an overexploitation which reduced the number of blue whales from about 240 000 to less than 500. I have here taken a closer look at the ...
(Master thesis / Masteroppgave, 2017)
(Master thesis / Masteroppgave, 2017)
European lobsters (Homarus gammarus) have been overfished for decades as it is a highly valued species. Commercial catch per unit of effort (CPUE) in Skagerrak, Norway has decreased to historically low levels in the most ...
Den relative effekten av bølger og biotiske faktorer på bentiske organismesamfunn. Studier belyst i marine mesokosmer. Restricted Access
(Master thesis / Masteroppgave, 2017)
(Master thesis / Masteroppgave, 2017)
Seasonal variation in space use of sea trout - A case study of sea trout in the Tvedestrand fjord, Southern Norway. Restricted Access
(Master thesis / Masteroppgave, 2016)
(Master thesis / Masteroppgave, 2016)
(Master thesis / Masteroppgave, 2016)
Data from a monitored segment (about 20 vessels) of the fleet of about 6000 small vessels (less than 15 meters length overall) operating bottom-set gillnets for cod (Gadus morhua) and monkfish (Lophius piscatorius) in the ...
(Master thesis / Masteroppgave, 2016)
(Master thesis / Masteroppgave, 2016)
Sammendrag Kokkolitoforer, også kalt kalkflagellater, er en viktig gruppe marine planktonalger. Det som kjennetegner denne algegruppen er at de produserer skjell , kalt kokkolitter, på utsiden av cellen som er dannet av ...
(Master thesis / Masteroppgave, 2016)
It is important both from a management and conservation point of view to uncover the potential of a species to cope with climate warming, and whether this potential differ among populations. In this thesis I used Atlantic ...
Protists in the intestinal content of Atlantic cod (Gadus morhua L.), with a special emphasis on two parasite groups; the X-cell and Mesomycetozoa. Restricted Access
(Master thesis / Masteroppgave, 2015)
Protists have representatives in all but one of the kingdoms in the tree of life and are highly important in the oceans, where they generate most of the carbon-flow in the first trophic levels. Parasitic lineages work as ...
(Master thesis / Masteroppgave, 2015)
The tropical Red Sea coast of Saudi Arabia is dominated by intertidal soft sediments, seagrass meadows and mangrove beaches. These habitats have been under high pressure for decades partly due to anthropogenic activity. ...
(Master thesis / Masteroppgave, 2015)
Temperature and elemental composition are key factors that affect life history traits in algae. Climate change is predicted to cause major temperature changes in the ocean that may affect algal populations, seasonal dynamic ...
(Master thesis / Masteroppgave, 2015)
My experiments tried to investigate the effect of available surfaces on rotifer growth, and the benefits of the attached state. A linear model was formulated to test whether the predictions for functional respones of ...
(Master thesis / Masteroppgave, 2015)
(Master thesis / Masteroppgave, 2015)
A description of the epidermal structure of minke and humpback whales in relation to their respective capabilities of retaining suction-cup tags.
(Master thesis / Masteroppgave, 2015)
(Master thesis / Masteroppgave, 2015)
(Master thesis / Masteroppgave, 2015)
Predator-prey interactions are prevalent in all natural ecosystems and are regarded as a fundamental force in ecological as well as in evolutionary processes. A series of studies have investigated predator-prey dynamics ...
Protist diversity across a marine - freshwater gradient with a special focus on the X-cell parasite Restricted Access
(Master thesis / Masteroppgave, 2014)
Protists are a highly abundant and diverse group of microorganisms that hold important ecological roles in all aquatic ecosystems. Phototrophic protists are responsible for a large portion of the global primary production, ...
(Master thesis / Masteroppgave, 2014)
In this thesis a bio-optical model was used in order to identify and characterise diversity and fertilisation effects on primary productivity in Freshwaters. The experiments were conducted in mesocosms, comprising 12 ...