Fakultet for biovitenskap, fiskeri og økonomi: Recent submissions
Now showing items 181-200 of 5171
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Relasjonsledelse. En studie av betydningen av leder – medarbeiderrelasjonen
(Master thesis; Mastergradsoppgave, 2023-12-01)I dette forskningsprosjektet har vi søkelys på relasjonen mellom leder og medarbeider. Vi tilbringer store deler av dagen på jobb, og det er viktig å føle at man har en god relasjon og føler trygghet til sin leder. Det er dessverre ikke slik for alle, noe som kan resultere i både turnover, sykemeldinger og konflikter. Dette er verken bedriften eller den enkelte medarbeider tjent med. Formålet ... -
Role of the lactate receptor HCAR1 as part of neural adaptations to hypoxia in hooded seals (Cystophora cristata)
(Master thesis; Mastergradsoppgave, 2023-11-15)To maintain normal neuronal function, the mammalian brain requires a constant supply of energy. The deep-diving hooded seal (<i>Cystophora cristata</i>) brain exhibits remarkable tolerance to extreme hypoxia, presumably involving a reduction in brain activity to lower energy demand. Thus, some neurons, circuits or even regions in the seal’s brain presumably display a neural protective shutdown ... -
Bioactivity profiling and mode of action studies of antibacterial and antibiofilm agents of marine origin
(Doctoral thesis; Doktorgradsavhandling, 2024-01-26)<p>The emergence of drug-resistant strains and new pathogens intensifies the need for new antimicrobials. Additionally, bacterial biofilms, which contribute to persistent infections, further complicate treatment efforts. The increasing difficulty in discovering and developing new antimicrobials adds to this challenge. However, marine environments, with their vast biodiversity, offer a promising ... -
Improving the size selectivity and exploitation pattern of cocktail shrimp (Trachypenaeus curvirostris) in shrimp trawl fishery of the South China Sea
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-13)In order to improve the size selectivity and exploitation pattern for cocktail shrimp (Trachypenaeus curvirostris) in shrimp trawl fishery of the South China Sea (SCS), selective properties of four codends were tested and compared. These experimental codends involved two mesh sizes, 30 and 35 mm, and two mesh shapes, diamond-mesh (T0) and diamond-mesh turned by 90 degree (T90), respectively. Our ... -
Mucosal and systemic physiological changes underscore the welfare risks of environmental hydrogen sulphide in post-smolt Atlantic salmon (Salmo salar)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-04)Atlantic salmon (Salmo salar) might encounter toxic hydrogen sulphide (H<sub>2</sub>S) gas during aquaculture production. Exposure to this gas can be acute or chronic, with heightened levels often linked to significant mortality rates. Despite its recognised toxicity, our understanding of the physiological implications of H<sub>2</sub>S on salmon remains limited. This report details the mucosal and ... -
A combined microbial and biogeochemical dataset from high-latitude ecosystems with respect to methane cycle
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-04)High latitudes are experiencing intense ecosystem changes with climate warming. The underlying methane (CH4) cycling dynamics remain unresolved, despite its crucial climatic feedback. Atmospheric CH<sub>4</sub> emissions are heterogeneous, resulting from local geochemical drivers, global climatic factors, and microbial production/consumption balance. Holistic studies are mandatory to capture ... -
Environmental impacts of aquaculture and coexcisting industries
(Research report; Forskningsrapport, 2023)This is the final report for the project "Environmental impact of aquaculture and coexisting industries - scope for comprehensive regulation" - "MILJØREG". The project is funded by the Norwegian Fisheries and Aquaculture Industry's research funding. The main goal of the project has been to prepare a broad overview of the knowledge base related to the environmental impact of aquaculture, as well ... -
Sustainable blue foods: drivers and barriers in northern Norway
(Research report; Forskningsrapport, 2023)There is a push for transition to sustainable blue food systems in the High North. An interdisciplinary group of Fram Centre researchers have looked closer at the drivers motivating the transition and identified a set of barriers to sustainable blue food systems in northern Norway. -
Connecting the multiple dimensions of global soil fungal diversity
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-29)How the multiple facets of soil fungal diversity vary worldwide remains virtually unknown, hindering the management of this essential species-rich group. By sequencing high-resolution DNA markers in over 4000 topsoil samples from natural and human-altered ecosystems across all continents, we illustrate the distributions and drivers of different levels of taxonomic and phylogenetic diversity of fungi ... -
Trophic relationships in the Early Miocene Upper Marine Molasse of Baden-Württemberg, Southwest Germany, with special emphasis on the elasmobranch fauna
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11)The Early Miocene Upper Marine Molasse (OMM) in south-western Germany contains a diverse fossil ecosystem in which elasmobranch teeth are especially abundant. However, the scarcity of outcrops and sometimes poor preservation of fossils resulted in scant recent literature about the OMM. Here, we focus on the elasmobranch fauna to determine the trophic relationships within the OMM, using fossil ... -
Snowmelt progression drives habitat selection and vegetation disturbance by an Arctic avian herbivore
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-17)Arctic tundra vegetation is affected by rapid climatic change and fluctuating herbivore population sizes. Broad-billed geese, after their arrival in spring, feed intensively on belowground rhizomes, thereby disturbing soil, mosses, and vascular plant vegetation. Understanding of how springtime snowmelt patterns drive goose behavior is thus key to better predict the state of Arctic tundra ecosystems. ... -
Gut microbiome biogeography in reindeer supersedes millennia of ecological and evolutionary separation
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-29)Ruminants are dependent on their gut microbiomes for nutrient extraction from plant diets. However, knowledge about the composition, diversity, function, and spatial structure of gut microbiomes, especially in wild ruminants, is limited, largely because analysis has been restricted to faeces or the rumen. In two geographically separated reindeer subspecies, 16S rRNA gene amplicon sequencing revealed ... -
Hepatic melanomacrophage centers in the arctic cultured fish Cyclopterus lumpus are not indicative of its health state
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-11-26)The lumpfish, Cyclopterus lumpus, holds significant promise as a candidate for large-scale aquaculture production, particularly in its role as a cleaner fish used to manage sea lice infestations in Atlantic salmon Salmo salar farming. Melanomacrophage centers (MMCs) represent polymorphic structures present in the hemolymphopoietic organs of various vertebrates, serving as a widely applicable ... -
Effect of rotational harvesting on the size composition of Cape rock oysters Striostrea margaritacea on the east coast of South Africa
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-11)A commercial fishery for the Cape rock oyster Striostrea margaritacea along the north coast of KwaZulu-Natal, South Africa (western Indian Ocean), follows a 4-year rotational cycle, with each harvest year followed by 3 fallow years across four harvest zones. We analysed reported harvesting effort and catch information, and fishery-independent oyster size composition data collected over 18 years (Feb ... -
Global economic drivers in the development of different industrial hubs in the European Arctic
(Research report; Forskningsrapport, 2022-03)This project report discusses global drivers affecting the development of key industries in the European Arctic (EA). Aquaculture is important for littoral states in the North, forestry and mining for northern Scandinavia, and tourism throughout the northern regions in the EA, and all are affected by globalization. Globalization is not a homogeneous, uniform phenomenon, but consists of various global ... -
The COVID-19 pandemic and regional economic resilience in northern Finland, Norway, and Sweden – bouncing back or not?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023)The COVID-19 pandemic has been first and foremost a health crisis, but it has also had severe negative impacts on the global economy. It has shaken regional economies, especially labour markets, over the last two years. Arctic regions are no exception. The aim of this article is to analyse the regional economic impacts, as well as the recovery processes, of the COVID19 pandemic in Arctic 5 cities ... -
From Winter to Late Summer in the Northwestern Barents Sea Shelf: Impacts of Seasonal Progression of Sea Ice and Upper Ocean on Nutrient and Phytoplankton Dynamics
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-11)Strong seasonality is a key feature of high-latitude systems like the Barents Sea. While the interannual variability and long-term changes of the Barents Sea are well-documented, the seasonal progression of the physical and biological systems is less known, mainly due to poor accessibility of the seasonally ice-covered area in winter and spring. Here, we use an extensive set of physical and biological ... -
Photophysiological responses of bottom sea-ice algae to fjord dynamics and rapid freshening
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-13)Sea ice algae have a broad salinity tolerance but can experience stress during rapid decreases in salinity that occur with seasonal ice melt and during ice sample melt. This study investigated the impact of salinity on the photophysiological responses of bottom-ice algal communities from two Svalbard fjords (Tempelfjorden and Van Mijenfjorden). To further investigate the impact of salinity alone, ... -
Human responses to year-round lighting using Google Trends to investigate seasonality in activity patterns and libido
(Master thesis; Mastergradsoppgave, 2023-11-16)Seasonal rhythms in humans are fascinating but studying them is inherently challenging due to the need for data that covers multiple years. Due to the experimental obstacles, it remains debated whether humans exhibit seasonal fluctuations in aspects such as activity levels and libido. To approach these topics through indirect digital measures, this thesis used multi-year data from Google Trends ... -
Reindeer diseases associated with supplementary feeding in Norway and Sweden - A questionnaire-based survey
(Master thesis; Mastergradsoppgave, 2021-11-15)Climatic and anthropogenic factors are increasingly affecting reindeer husbandry in Norway and Sweden. The potential health risks associated with a warming climate, and the necessity to avoid starvation by providing supplementary feed to semi-domesticated reindeer, need to be explored and identified. A questionnaire-based survey among reindeer herders was conducted, containing questions about the ...