Fakultet for biovitenskap, fiskeri og økonomi: Nye registreringer
Viser treff 581-600 av 5173
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The effect of endurance training on mitochondrial function in Siberian huskies and Alaskan huskies
(Master thesis; Mastergradsoppgave, 2023-05-15)Teams of Alaskan huskies and Siberian Huskies are used to pull sleds and compete in long-distance races such as Finnmarksløpet (1200 km) and the Iditarod (1600 km). That is an elite athlete performance, and their ability to conduct such extreme endurance challenges under arctic conditions is poorly understood. A previous study has shown that Alaskan huskies possibly have the highest values of ... -
Microplastics Accumulation in Recirculating Aquaculture Systems (RAS)
(Master thesis; Mastergradsoppgave, 2023-05-14)It has in recent years been a shift in the land-based aquaculture production from flow through systems (FTS) to recirculating aquaculture systems (RAS). With emerging use of RAS, it is necessary with knowledge regarding potential issues, whereas one potentially increasing problem is accumulation of microplastics (MP) in the RAS water. The objects of this study were to determine MPs concentration in ... -
Microbial responses to warming and seasonal temperature changes in sub-Arctic forest and grassland soils
(Master thesis; Mastergradsoppgave, 2023-05-15)Atmospheric carbon dioxide (CO2) levels and global temperatures have increased steadily over the past 100 years (IPCC, 2018). Greenhouse gases, such as CO2, and their emissions from soils play an important role in shaping future climate scenarios. Soil microorganisms are responsible for the turnover of soil organic matter and the release of CO2 to the atmosphere (Hartley et al., 2008), thereby ... -
The Suprachiasmatic Nucleus of The Reindeer (Rangifer tarandus tarandus) and it’s Circadian Outputs
(Master thesis; Mastergradsoppgave, 2023-05-14)The Earth is in constant movement around the Sun – this has created environments with changing light throughout the day and year. Through evolution animals have adapted to this change in light and circadian and circannual rhythms have evolved to enhance fitness and survival. Animals living in the Arctic region have a different relationship to light changes as for several months a year the Sun ... -
Biotic and abiotic drivers of barnacle recruitment along a sub-Arctic intertidal rocky shore
(Master thesis; Mastergradsoppgave, 2023-05-15)Most marine ecological research in the Arctic has focused on open water ecosystems, while coastal ecosystems are systematically under-studied. However, Arctic near-shore ecosystems are highly stressed environments and play a major role in biogeochemical cycling (e.g., nutrient input from thawing permafrost). Furthermore, the Arctic region has extreme environmental conditions which are expected ... -
Circannual rhythms in Arctic charr (Salvelinus alpinus)
(Master thesis; Mastergradsoppgave, 2023-05-15)The Arctic charr (Salvelinus alpinus) is a true arctic species and is considered to be the northernmost freshwater fish. Since this species is being known for its great variability in size, phenotype, colour, ecology and history, some of them are landlocked (which stay in freshwater all their life) and others are anadromous (they undertake summer migrations to sea and then they come back to ... -
Changes in the distribution of marine invertebrates in a warming Barents Sea over the last century
(Master thesis; Mastergradsoppgave, 2023-05-14)The Barents Sea is a shelf sea in the European Arctic and is influenced by the North Atlantic Current and the Arctic Ocean. The North Atlantic Current is composed of warmer, saline waters compared to the cold, fresher waters from the Arctic Ocean. Over the last century, the Barents Sea mean temperature has increased by 1.5°C above a depth of 60m and by 0.5-0.8°C below 60m. This warming is ... -
Developing a mitigation hierarchy framework to conserve wetland biodiversity under pressure from development
(Master thesis; Mastergradsoppgave, 2023-05-16)Wetlands are severely affected by human development. About 50 % of their original global extent has been lost, their populations of plants and animals have declined faster than for any other ecosystem, and 25 % of wetland-dependent species are threatened. As the main reason for these declines is habitat loss, often caused by infrastructure development, it is critical to develop conservation strategies ... -
Beyond Catching Fish: Exploring the role of Relational Values in Mobilizing Community-based Management Efforts in a north Norwegian lake
(Master thesis; Mastergradsoppgave, 2023-05-15)All over the world, local communities are actively engaging in the management and monitoring of natural resources. The underlying driver of most community-driven efforts goes beyond the direct utilization of natural resources to entail a deeper relation to the place or ecosystem they are managing. Relational values have been suggested as a potential driver of such initiatives, but empirical research ... -
Size composition, reproductive investment, and fecundity of red king crab (Paralithodes camtschaticus) in Finnmark fjords, 1994-2022
(Master thesis; Mastergradsoppgave, 2023-05-15)The release of red king crab (Paralithodes camtschaticus) into the Barents Sea by Russian scientists in the 1960s had the goal of establishing a self-sustaining stock for the purpose of commercial harvest. The red king crab has been successfully established as a stock in Norwegian waters where it has become an important commercial resource in the eastern regions of Finnmark. The Norwegian red king ... -
Kartlegging av dødelighet og vekst i produksjonen av triploid settefisk (Salmo Salar L.) i perioden 2017-2021 i et norsk settefiskanlegg
(Master thesis; Mastergradsoppgave, 2023-05-15)Noen av de største utfordringene i dagens oppdrett av atlantisk laks (Salmo Salar L.) er knyttet til påvirkninger av miljøet. Rømming av oppdrettslaks er en stor miljøutfordring da det er fare for at rømt oppdrettslaks kan påvirke vill laks genetisk i tillegg til spredning av lakselus (Lepeophtheirus salmonis). Produksjon triploid laks er en måte å produsere steril laks på, og et tiltak for å gjøre ... -
Hvor ble det av kystreka? Formidling av forskningsresultater med StoryMap
(Master thesis; Mastergradsoppgave, 2023-05-15)Dypvannsreke Pandalus borealis har er en viktig ressurs for fiskere langs norskekysten. Årlige kvoter fastsettes basert på råd av havforskning, fiskeristatistikk og innspill fra ulike interesser, forhandlinger mellom land og politiske føringer for å sikre en bærekraftig forvaltning. Planlegging, håndtering og overvåkning av ressurser i kystsonen er viktig for å ta vare på økosystemene og sikre ... -
To tell or not to tell: Preference elicitation with and without emphasis on scientific uncertainty
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-01)Decisions about the optimal use of coastal and marine resources must be taken under high uncertainty about environmental impacts and may conflict with public perception of the risk associated with current blue growth initiatives. In a discrete choice experiment conducted in valuation workshops in five communities in Arctic Norway, we examine public preferences for various aquaculture expansion paths. ... -
Optimizing intensive culture protocols for Atlantic cod (Gadus morhua) larvae
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-22)Larval cod require live prey as food, and prey concentration (PC) and feeding frequency (FF) often afect their growth and survival. Apart from this, water exchange rates/water fow (WER/WF) and water current (WC) also afect the prey resident time in the tank and larval/early juvenile behaviour, respectively. High water current is also known to induce stress in fnfsh larvae, and this stress response ... -
High seasonal overlap in habitat suitability in a nonmigratory High Arctic ungulate
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-26)Understanding drivers of space use and habitat selection is essential for management and conservation, especially under rapid environmental change. Here, we develop summer and winter habitat suitability models for the endemic wild Svalbard reindeer (Rangifer tarandus platyrhynchus). The High Arctic Svalbard tundra is currently subject to the fastest temperature increases on Earth, and reindeer ... -
Seasonal dynamics of four cryptic species of Crepidostomum spp. in a subarctic lake in Northern Norway
(Master thesis; Mastergradsoppgave, 2023-05-16)The function of parasites in ecosystems is often overlooked, and there is a general lack of knowledge about parasite biodiversity down to species levels, especially for cryptic species. This study looks at the seasonal dynamics of four cryptic species of the trematode Crepidostomum spp. in Lake Takvatn, Northern Norway. Samples were collected between June 2017 and May 2018, and a total of 560 ... -
Framtidig tilnærming i bearbeidingsprosessen hos SalMar InnovaNor
(Master thesis; Mastergradsoppgave, 2023-05-15)Temaet for masteroppgaven er innovasjon og bærekraftig utvikling i sjømatnæringen. Målet med studien er å se på implementering og mulighetsområder for bearbeidingsprosessen inn mot et grønt skifte. Tematikken vil bli belyst gjennom selskapet SalMar InnovaNor. SalMar InnovaNor er et slakteri- og bearbeidingsanlegg på Senja som driver med bearbeiding av laks, og er et av de største selskapene innenfor ... -
Broad-Host-Range Genetic Tools for Observing Microbial Consortia
(Master thesis; Mastergradsoppgave, 2023-05-15)Microbial communities are complex assemblages that are key to ecosystem stability and human health. Synthetic ecology aims to design and construct microbial consortia with reduced complexity that enable innovative applications beyond monocultures. However, their robust and performance-based design is constrained by limited knowledge of growth dynamics and derived binary interactions that are critical ... -
Northern expansion is not compensating for southern declines in North American boreal forests
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-08)Climate change is expected to shift the boreal biome northward through expansion at the northern and contraction at the southern boundary respectively. However, biome-scale evidence of such a shift is rare. Here, we used remotely-sensed tree cover data to quantify temporal changes across theNorth American boreal biome from 2000 to . 2019. We reveal a strong northsouth asymmetry in tree cover change, ... -
Kunnskapskartlegging-produksjon av stor laksesmolt
(Research report; Forskningsrapport, 2023-05-26)Basert på forskning og erfaringer kan det gis noen anbefalinger for produksjon av storsmolt med tanke på sentrale produksjonsparametere i den landbaserte fasen av produksjonen. En temperatur på 10-12 °C anbefales for å sikre god vekst i sjøfase og redusere tidlig kjønnsmodning hos hannfisk. Det anbefales ikke å gå bort fra lysstyring for å indusere smoltifisering før det foreligger mer dokumentasjon ...