Det er et stort behov for marine langkjedede omega-3 fettsyrer både til humant konsum og til fiskefôr. De langkjedede omega-3 fettsyrene EPA og DHA har gunstige helseeffekter for både mennesker og fisk. Mengden villfanget fisk har de siste 40 årene nådd maksimal utnyttelse mens volumet av oppdrettsfisk har økt betraktelig. Mangelen på marint råstoff har ført til en økt andel terrestrisk råstoff i ...

This thesis presents a rich introduction to the evolution, life history and physiology of Atlantic salmon, with a special emphasis on the developmental transitions (termed smolting) juvenile salmon pass through has they prepare to migrate from their native freshwater habitat to the sea. The introduction provides a comprehensive background on chronobiology and osmoregulation in fishes and links this ...

Marine microbes are crucial for the marine food web and carbon cycle. Algae are the main source of organic matter in the oceans with algae blooms triggering reoccurring bacterial succession patterns. Bacteria can recycle nutrients from organic matter coming from land or algae, fueling regenerated primary production. Terrestrial freshwater inputs can have substantial impacts on Arctic marine microbes ...

The motivation for macroalgal cultivation is to meet the global demand for food, energy and biomaterials for a rapidly growing human population in the context of the challenges of limited terrestrial food resources. Over the last 20 years the interest in seaweed cultivation has increased in European countries, and the kelp <i>Saccharina latissima</i> is one of the best-suited species for cultivation ...

This thesis investigates preferences for honesty in economic experiments. Preferences for honesty have attained a fair amount of attention in the last couple of decades, from multiple areas within the social sciences, including economics. This thesis may serve as an introduction to the field. First, it provides an introduction to experiments in economics, before it dives into how economists conduct ...

<p>Microbial eukaryotes, including protists and fungi, play diverse functions in virtually all ecosystems. In the High Arctic, their high biomass and diversity reflects crucial ecological importance and the performance of key ecological processes. Protists are the main primary producers in arctic seas, whereas fungi are an important group of decomposers and symbiotic partners of plants in terrestrial ...

Rapid environmental changes are currently occurring in the Arctic because of global warming. Arctic food webs can exhibit complex dynamics because of the prevalence of tight interactions between trophic levels. Climate change impacts can therefore propagate across food webs and result in non-trivial indirect effects on arctic species and populations. In this thesis, constituted by four papers, I ...

The thesis gives an introduction to natural product drug discovery and the underlying chemical principles that make natural products privileged structures for drug discovery. Paper I deals with the isolation of Lipid 430 from cultures of two <i>Algibacter</i> sp. isolates and the investigation of their anti-proliferative and anti-bacterial effect. Paper II describes the isolation of Serratiochelin ...

Nature provides people with a wide range of benefits, also known as nature’s contributions to people (NCP). The NCP framework evolved from the Ecosystem services (ES) concept as a response to the critiques and misconceptions associated with ES over the last years. Broadening ES valuations that have been dominated by economic valuations, the NCP framework emphasizes a pluralistic approach to valuation ...

Demersal trawl fisheries play an important role in providing income and protein to the people of the Southwestern Indian Ocean (SWIO). These fisheries are very destructive to the habitats in which they operate and have an impact on the associated biodiversity. Three crustacean species, knife prawn (<i>Haliporoides triarthrus</i>), African langoustine (<i>Metanephrops mozambicus</i>) and pink geryon ...