Browsing Institutt for biologi by Title
Now showing items 1-20 of 2642
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1H NMR metabolic profiling of cod (Gadus morhua) larvae: potential effects of temperature and diet composition during early developmental stages
(Journal article; Peer reviewed, 2015)Marine aquaculture offers a great source of protein for the increasing human population, and farming of, for example, Atlantic salmon is a global industry. Atlantic cod farming however, is an example of a promising industry ... -
A battle of the mountains: Intraguild competition between arctic fox Vulpes lagopus and red fox Vulpes vulpes
(Master thesis, 2019)Fjellreven (Vulpes lagopus) er en truet art i Fennoskandia. Konkurranse med rødreven (Vulpes vulpes) er regnet som en av hovedtruslene for fjellrevens utbredelse. Flere bevaringstiltak har blitt satt i gang for å redde ... -
A Biomarker assay of Troponin T in patients with Atrial Fibrillation, and the response of Exercise until Exhaustion
(Master thesis, 2024)Introduksjon: Atrieflimmer (AF) er en vanlig hjertesykdom som påvirker store deler av verdens befolkning, og den er forventet å øke i fremtiden. Risikofaktorer som øker sannsynligheten for AF er alder, hjertestørrelse, ... -
A burning question: what are the risks and benefits of mammalian torpor during and after fires?
(Journal article; Peer reviewed, 2018)Although wildfires are increasing globally, available information on how mammals respond behaviourally and physiologically to fires is scant. Despite a large number of ecological studies, often examining animal diversity ... -
A comparative study of diploid versus triploid Atlantic salmon (Salmo salar L.). The effects of rearing temperatures (5, 10 and 15 °C) on raw material characteristics and storage quality
(Journal article; Peer reviewed, 2017)Several major market operators argue that the current level of knowledge about quality is too scant to justify a switch to a large-scale production of triploid salmon. The aim of the present study was, therefore, to elucidate ... -
A comparative study of the physiological responses of chronically stressed diploid and triploid Atlantic salmon (Salmo salar)
(Master thesis, 2022)Rømt oppdrettslaks (Salmo salar) regnes for å være en av de største truslene som påføres ville populasjoner av Atlantisk laks grunnet introgressiv hybridisering. Dette kan unngås ved å indusere sterilitet i oppdrettslaksen, ... -
A comparison of growth and timing of outward autumn migration between a lake run and a sea run brown trout (Salmo trutta) population.
(Master thesis, 2024)I denne studien er det undersøkt vekst- og migrasjonsmønster hos brunørret (Salmo trutta). Disse ble merket og sporet ved hjelp av akustisk telemetri i to norske elver, lokalisert på like breddegrader: én sjøvandrende ... -
A comparison of life history and biological characters between Atlantic salmon first-time and repeat spawners in two Norwegian rivers
(Master thesis, 2023)Iteroparitet er en avveiningsstrategi mellom nåværende og fremtidig reproduksjon. Risikoen for svikt i reproduksjonen er spredt over tid dersom fisken kan overleve sin første gyting og gyte igjen på et senere tidspunkt. ... -
A comparison of the chemical toxicity of recycled versus pristine plastics using Daphnia magna
(Master thesis, 2024)Dersom verdens produksjon og bruk av plast fortsetter som den er i dag, vil den totale produksjonen nå 1,1 millioner tonn innen år 2050. Den enorme plastforurensningen i miljøet har i det siste fått stor politisk oppmerksomhet. ... -
A Complex Interaction between Rickettsia conorii and Dickkopf-1 - Potential Role in Immune Evasion Mechanisms in Endothelial Cells
(Journal article; Peer reviewed, 2012)The pathophysiological hallmark of spotted fever group rickettsioses comprises vascular inflammation. Based on the emerging importance of the wingless (Wnt) pathways in inflammation and vascular biology, we hypothesized ... -
A comprehensive evaluation of predictive performance of 33 species distribution models at species and community levels
(Journal article; Peer reviewed, 2019)A large array of species distribution model (SDM) approaches has been developed for explaining and predicting the occurrences of individual species or species assemblages. Given the wealth of existing models, it is unclear ... -
A comprehensive mitogenome phylogeny of the avian tribe Arini (Arinae: Psittacidae) with emphasis in Pyrrhura species
(Master thesis, 2021)The tribe Arini is the most diverse group of Neotropical parrots, and it includes approximately 158 species distributed in at least 32 genera. These parrots have been largely affected by habitat loss, fragmentation, and ... -
A CRISPR/Cas13-based method for downregulation of ALB3 genes in Phaeodactylum tricornutum
(Master thesis, 2021)Diatoms, a group of unicellular photosynthetic microalgae, are of high ecological importance. They are responsible for about 20% of the world’s oxygen production. They have also been exploited in research due to their high ... -
A CRISPR/Cas9 system adapted for gene editing in marine algae
(Journal article; Peer reviewed, 2016)Here we report that the CRISPR/Cas9 technology can be used to efficiently generate stable targeted gene mutations in microalgae, using the marine diatom Phaeodactylum tricornutum as a model species. Our vector design opens ... -
A Crude Awakening: Effects of Crude Oil on Lipid Metabolism in Calanoid Copepods Terminating Diapause
(Journal article; Peer reviewed, 2019)Calanus finmarchicus and Calanus glacialis are keystone zooplankton species in North Atlantic and Arctic marine ecosystems because they form a link in the trophic transfer of nutritious lipids from phytoplankton to predators ... -
A Diet Rich in Carbohydrates Induces Changes in Serum microRNA Levels Associated with Type 2 Diabetes Development.
(Master thesis, 2012)It is known that the level of serum microRNAs, small RNA molecules involved in regulation of gene expression, is altered in diabetic patients compared to healthy individuals and that microRNAs may be involved in the ... -
A dynamic state modelling approach to partial migration in brown trout
(Master thesis, 2022)Partiell migrasjon, fenomenet der ein populasjon har både individ som migrerer og individ som let vere, er observert i store delar av dyreriket. Mekanismane bak kan vere komplekse, og kan inkludere både genetikk og miljø ... -
A faunistic assessment of species diversity in the class Ascidiacea in Norwegian waters using morphological and molecular analyses, including three case studies of the genera Ascidiella Roule, 1884, Botryllus Gaertner, 1774, and Botrylloides Milne Edwards, 1841
(Master thesis, 2023)I moderne systematikk brukes en integrativ tilnærming for artsavgrensning, hvor morfologiske og molekylære metoder ofte kombineres. Ett av målene med DNA-strekkoding er å bygge en plattform for identifisering av dyrearter, ... -
A General Stochastic Dynamic Model of the Differential Allocation Hypothesis
(Master thesis, 2015)Differential allocation (DA), adjusting reproductive investment according to the quality of the current mate, is an area of evolutionary behavioral ecology subject to much confusion, with vague terminology, apparently ... -
A genetic insight to the population of African savannah elephants (Loxodonta africana) in the Serengeti Ecosystem, Tanzania.
(Master thesis, 2011)African savannah elephants play a vital role in the Serengeti ecosystem with the opportunity to alter the entire ecosystem by its sheer number. Management of these animals are therefore of high importance, but little genetic ...