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norskFakultet for biovitenskap, fiskeri og økonomi
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Synchronous timing of return to breedingsites in a long-distance migratory seabirdwith ocean-scale variation in migrationschedules
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-22)Background Migratory birds generally have tightly scheduled annual cycles, in which delays can have carry-over effects on the timing of later events, ultimately impacting reproductive output. Whether temporal carry-over effects are more pronounced among migrations over larger distances, with tighter schedules, is a largely unexplored question. <p><p>Methods We tracked individual Arctic Skuas ... -
Sluttrapport for prosjekt: "Kartlegging og testing av metoder for å redusere interaksjoner mellom fiskeri og hval" - FHF 901681
(Research report; Forskningsrapport, 2024-04-03)Spekkhoggere og knølhval i norske farvann følger den pelagiske fiskeflåten og beiter på fisken som blir samlet sammen av nøtene. Disse interaksjonene har ved flere anledninger ført til skade eller død av hval, og fangsttap og ødelagte redskap for fiskerne. Målsetningen i dette prosjektet var å kartlegge og teste utstyr og metoder som kan bidra til å redusere uønskede interaksjoner mellom spekkhoggere ... -
Mitogenomic evidence of population differentiation of thorny skate, Amblyraja radiata, in the North Atlantic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-25)Management of thorny skate (Amblyraja radiata) in the Northwest Atlantic has posed a conservation dilemma for several decades due to the species' lack of response to strong conservation efforts in the US Gulf of Maine and the Canadian Scotian Shelf, confusion over the relationship between two reproductive size morphs of differing life histories that are sympatric in the Northwest Atlantic, and ... -
Reindeer in the Arctic reduce sleep need during rumination
(Journal article; Tidsskriftartikkel, 2023-12-22)Timing and quantity of sleep depend on a circadian (ca 24-h) rhythm and a specific sleep requirement. Sleep curtailment results in a homeostatic rebound of more and deeper sleep, the latter reflected in increased electroencephalographic (EEG) slow-wave activity (SWA) during non-rapid eye movement (NREM) sleep. Circadian rhythms are synchronized by the light-dark cycle but persist under constant ... -
Assisting healthier and more sustainable online food choices through digital quality signals: Exploring preferences and segments
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-26)The current paper contributes to signalling theory by demonstrating the importance of digital quality signals in influencing consumer preferences for sales and segmentation in the context of marketing fresh fish online. We conducted a choice-based conjoint analysis with a latent class segmentation to analyse the significance of digital quality signals compared to traditional attributes online. The ... -
A Relational Approach to Event Sustainability: Applying Actor–Network Theory and Foucauldian Discourse Analysis to a Music Event
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-28)The framing of event sustainability should go beyond the greening of specific events and the event sector. Based on a relational approach, we used actor–network theory and Foucauldian discourse analysis to investigate the debate on a music event sustainability. We collected and discursively analysed online newspapers and social media data regarding this event’s sustainability. The findings showed a ... -
Interannual differences in sea ice regime in the north-western Barents Sea cause major changes in summer pelagic production and export mechanisms
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-22)The Barents Sea is a highly dynamic and productive marine ecosystem and a hotspot of global warming. Variability in sea ice extent is a common feature in the Barents Sea with substantial movements of the sea ice edge on short-term, seasonal to interannual time scales. Historically the northern Barents Sea (north of 75◦N) has been ice-covered in winter, but recently it has become the area with most ... -
Fra praktisk matematikk til matematikk for økonomer
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-12)Matematikk er et obligatorisk fag ved mange utdanninger, blant annet innenfor økonomi. Denne studien gir ny innsikt i hvordan økonomistudenter med praktisk matematikk fra videregående skole presterer på eksamen i matematikk. Regresjonsanalyse blir benyttet på utvalget av 1489 studenter fra Handelshøgskolen ved UiT i perioden 2016–2022. Over 60 % har praktisk matematikk som bakgrunn, slik at ... -
Can plastic related chemicals be indicators of plastic ingestion in an Arctic seabird?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-22)For decades, the northern fulmar (Fulmarus glacialis) has been found to ingest and accumulate high loads of plastic due to its feeding ecology and digestive tract morphology. Plastic ingestion can lead to both physical and toxicological effects as ingested plastics can be a pathway for hazardous chemicals into seabirds' tissues. Many of these contaminants are ubiquitous in the environment and the ... -
Retrieval operations of derelict fishing gears give insight on the impact on marine life
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-16)Abandoned, lost and discarded fishing gear (ALDFG), significantly impacts marine ecosystems and biodiversity by incidental capture known as ghost fishing. Such impacts were quantified during the Norwegian Directorate of Fisheries' annual ALDFG cleanup operation in September 2023 by examining the characteristics of retrieved ALDFG and recording the taxonomically sorted catch abundance and biomass. A ... -
Global standards and the philosophy of consumption: Toward a consumer-driven governance of global value chains
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-27)This study delves into the significant ethical criteria in the context of global standards. It addresses the moral wrongdoings and adverse side effects associated with global value chains as discussed in the business ethics literature. The methodology involves theoretical application and synthesis. The study employs ethical principles from deontology, consequentialism, and political cosmopolitanism ... -
Global consortium for the classification of fungi and fungal-like taxa
(Journal article; Tidsskriftartikkel, 2023-12-12)The Global Consortium for the Classification of Fungi and fungus-like taxa is an international initiative of more than 550 mycologists to develop an electronic structure for the classification of these organisms. The members of the Consortium originate from 55 countries/regions worldwide, from a wide range of disciplines, and include senior, mid-career and early-career mycologists and plant pathologists. ... -
Diel activity rhythms in wild songbirds in the Subarctic
(Master thesis; Mastergradsoppgave, 2024-02-15)The highly rhythmic environment caused by the rotation of the earth has driven the evolution of an intrinsic timekeeping mechanism in most organisms known as circadian clocks. As climate change drives the expansion of southern species into northern latitudes, their circadian clocks are challenged by the novel light conditions they encounter. In contrast to the clear day and night in southern latitudes, ... -
To keep or not to keep track of time in eternal sunshine? Diel activity patterns of Svalbard arthropods during polar day
(Master thesis; Mastergradsoppgave, 2024-02-16)Organisms on Earth are exposed to cyclic changes in environmental variables due to Earth’s rotation around it’s axis. As a response, many organisms adapt their behaviour in a rhythmic manner, which is often cued by 24h light-dark cycles. However, in the Arctic, traditional 24h light- dark cycle cues do not exist for long periods at the time. Arthropods play an important role in the high latitude ... -
Long-term warming-induced trophic downgrading in the soil microbial food web
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-01)Climatic warming has been hypothesized to accelerate organic matter decomposition by soil microorganisms and thereby enhance carbon (C) release to the atmosphere. However, the long-term consequences of soil warming on belowground biota interactions are poorly understood. Here we investigate how geothermal warming by 6 °C for more than 50 years affects soil microbiota. Using metatranscriptomics we ... -
Norwegian killer whale movements reflect their different preytypes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-21)Norwegian killer whales (Orcinus orca) are thought to be generalists that feed primarily on fish, but some individuals have been observed targeting pinnipeds. In the study reported here, field observations of foraging behaviours formed the basis of a priori classification as either seal-eaters or fish-eaters. Concurrent collection of photographic identification and biopsies for stable isotope analysis ... -
Fasting and its implications for fish welfare in Atlantic salmon aquaculture
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-20)Periods of fasting occur for a multitude of reasons in Atlantic salmon aquaculture. Feed withdrawal is widely used prior to transport, parasite treatments, preslaughter and for depuration purposes in recirculating aquaculture systems. Voluntary fasting is a coping response when fish have poor health or are exposed to poor farm environments. Owing to increased attention to animal welfare in aquaculture, ... -
Using neural networks to examine trending keywords in Inventory Control
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-27)Inventory control is one of the key areas of research in logistics. Using the SCOPUS database, we have processed 9,829 articles on inventory control using triangulation of statistical methods and machine learning. We have proven the usefulness of the proposed statistical method and Graph Attention Network (GAT) architecture for determining trend-setting keywords in inventory control research. We ... -
The Impact on Environmental Taxes on Transportation and Storage Enterprises’ Development – The Case of Balkan Countries.
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-19)Sustainable development counteracts climate change and strives for a good quality of life. It is a development based on economic, social and environmental goals which should be evaluated. Environmental taxes have to ensure enterprises’ development follows sustainability principles. The basis of environmental taxes is a physical unit of harmful substance emissions with a proven negative impact on the ... -
Establishment of killer whale cell cultures and their responses to pollutant exposure
(Master thesis; Mastergradsoppgave, 2022-03-15)The cosmopolitan apex predator killer whale (Orcinus orca) is one of the species worldwide with the highest levels of persistent organic pollutants (POPs) in their tissues. The knowledge of how POPs may affect the species is limited, likely due to the ethical, legal, and practical challenges of researching toxicology on free-ranging marine mammals. The use of in vitro models has proved to be a ...
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