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norskFakultet for biovitenskap, fiskeri og økonomi
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Handelshøgskolen ved UiT [903]
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Feeding ecology and interactions of invasive vendace and DR whitefish in the Pasvik watercourse
(Master thesis; Mastergradsoppgave, 2021-02-15)Introductions and invasions of species outside their natural range can have devastating effects on the native species and be a major driver of biodiversity change. When the zooplanktivorous vendace invaded the Pasvik watercourse in the 1990s, it quickly took over the ecological role of the native DR whitefish. In the upper part of the watercourse, DR whitefish was displaced from the pelagic habitat ... -
Gastrointestinal nematodes in Icelandic reindeer (Rangifer tarandus tarandus)
(Master thesis; Mastergradsoppgave, 2021-01-18)Reindeer (<i>Rangifer tarandus</i>) are host to gastrointestinal-tract nematodes (GINs) throughout the world. Some populations of reindeer exist in almost complete isolation from others, and this can have a key influence on the species and infection rates of GINs. An example of an isolated reindeer population occurs in Iceland. In this study, I have investigated the prevalence of GINs in Icelandic ... -
Adaptive niche-based sampling to improve ability to find rare and elusive species: Simulations and field tests
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-27)<ol> <li>Sampling efficiency is crucial to overcome the data crisis in biodiversity and to understand what drives the distribution of rare species.</li <li>Adaptive niche‐based sampling (ANBS) is an iterative sampling strategy that relies on the predictions of species distribution models (SDMs). By predicting highly suitable areas to guide prospection, ANBS could improve the efficiency of sampling ... -
Novelty in tourism experiences: the influence of physical staging and human interaction on behavioural intentions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-15)Tourists’ tendency to choose new and different experiences and destinations is well known in tourism research and practice. By drawing on social exchange theory and service-dominant logic, the present study investigates how physical staging and human interaction influence behavioural intentions in experiences with varying levels of novelty. This relationship is tested using survey data collected ... -
Nest association between two predators as a behavioral response to the low density of rodents
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-11-04)Many birds nest in association with aggressive birds of other species to benefit from their protection against predators. We hypothesized that the protective effect also could extend to foraging resources, whereby the resultant resource-enriched habitats near a nest of aggressive raptors could be an alternative cause of associations between nesting bird species with non-overlapping foraging niches. ... -
Interdependency in coordinating networked maintenance and modification operations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-05)Purpose - The purpose of this research is to detect, through applying a process-based view, how to manage economisation of the maintenance and modification operations in offshore petroleum logistics operations.<p> <p>Design/methodology/approach - A single case study of engineering services, more specifically, maintenance and modification service operations, on a Norwegian Sea oil platform reveals ... -
Phytoplankton community succession and dynamics using optical approaches
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-04)The phytoplankton in coastal regions are responding to constant environmental changes, thus the use of proxies derived from in situ frequent time-series observations and validated from traditional microscopic or pigment methods can be a solution for detecting rapid responses of community dynamics and succession. In this study, we combined in situ high-frequency (every 30 min from May to September ... -
The Transformation of Extralegal Principles into Legal Principles by the International Court of Justice in The Hague: Illustrated by a Peaceful Delimitation of «the Promised Land»
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020)Social norms are mixtures of extralegal and legal principles. The International Court of Justice‟ in The Hague‟s (ICJ) adjudication subtracts normative structures from different sources, moral, ethical, religious etc. dogmas amplifying its case law. The failing Israel-Palestine reconciliation that results from “power asymmetries” and “supreme emergency exception”, illustrates how absence of concomitant ... -
The networked handling of rush orders in customer services
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020)Rush orders are characterised by time constraints and organisational priority. They are handled by the supplier with the aim of meeting customer requirements in as limited a timeframe as possible. Rather than focusing on rush orders as a deterministic planning problem, this paper takes an inter-organisational perspective that highlights the complex networked interactions between the supplier and the ... -
Changes in air passenger demand as a result of the COVID-19 crisis: using Big Data to inform tourism policy
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-05)This paper develops a methodology for the early detection of reactivation of tourist markets to help mitigate the effects of the COVID-19 crisis, using Skyscanner data on air passenger searches (>5,000 million) and picks (>600 million), for flights between November 2018 and December 2020, through ForwardKeys. For future travel during the May to September 2020 period, the desire to travel (based on ... -
Asymmetric price transmission in a changing food supply chain
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-26)The farmed salmon supply chain in Europe is changing. There is a growing concentration at intermediary levels in the supply chain and more product differentiation in the market. This means that different price determination processes could apply in various product sub-markets. In this study, price transmission relationships in the salmon value chain were investigated at two different product levels. ... -
Geographic hierarchical population genetic structuring in British European whitefish (Coregonus lavaretus) and its implications for conservation
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-04)The European whitefish <i>Coregonus lavaretus</i> complex represents one of the most diverse radiations within salmonids, with extreme morphological and genetic differentiation across its range. Such variation has led to the assignment of many populations to separate species. In Great Britain, the seven native populations of <i>C. lavaretus</i> (two in Scotland, four in England, one in Wales) were ... -
High parasite diversity in the amphipod Gammarus lacustris in a subarctic lake
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-05)Amphipods are often key species in aquatic food webs due to their functional roles in the ecosystem and as intermediate hosts for trophically transmitted parasites. Amphipods can also host many parasite species, yet few studies address the entire parasite community of a gammarid population, precluding a more dynamic understanding of the food web. We set out to identify and quantify the parasite ... -
Does the Infectious Status of Aphids Influence Their Preference Towards Healthy, Virus-Infected and Endophytically Colonized Plants?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-11)Aphids (Hemiptera: Aphididae) cause significant damage and transmit viruses to various crop plants. We aimed to evaluate how the infectious status of aphids influences their interaction with potential hosts. Two aphid (Myzus persicae and Rhopalosiphum padi) and plant (Nicotiana tabacum and Triticum aestivum) species were used. The preferences of aphids towards healthy, virus-infected (Potato Leafroll ... -
Best environmental predictors of breeding phenology differ with elevation in a common woodland bird species
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-17)Temperatures in mountain areas are increasing at a higher rate than the Northern Hemisphere land average, but how fauna may respond, in particular in terms of phenology, remains poorly understood. The aim of this study was to assess how elevation could modify the relationships between climate variability (air temperature and snow melt‐out date), the timing of plant phenology and egg‐laying date of ... -
Infection and microbial molecular motifs modulate transcription of the interferon-inducible gene ifit5 in a teleost fish
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-21)Interferon-induced proteins with tetratricopeptide repeats (IFITs) are involved in antiviral defense. Members of this protein family contain distinctive multiple structural motifs comprising tetratricopeptides that are tandemly arrayed or dispersed along the polypeptide. IFIT-encoding genes are upregulated by type I interferons (IFNs) and other stimuli. IFIT proteins inhibit virus replication by ... -
Understanding and managing the interactions of impacts from nature-based recreation and climate change
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-04)Disturbance to ecosystems in parks and protected areas from nature-based tourism and recreation is increasing in scale and severity, as are the impacts of climate change—but there is limited research examining the degree to which these anthropogenic disturbances interact. In this perspective paper, we draw on the available literature to expose complex recreation and climate interactions that may ... -
Acceptance of near-natural greenspace management relates to ecological and socio-cultural assigned values among European urbanites
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-31)Grasslands are widespread elements of urban greenspace providing recreational, psychological and aesthetic benefits to city residents. Two urban grassland types of contrasting management dominate urban greenspaces: frequently mown, species-poor short-cut lawns and less intensively managed, near-natural tall-grass meadows. The higher conservation value of tall-grass meadows makes management interventions ... -
Verdifulle turismeopplevelser - verdi for hvem?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-02)Verdifulle opplevelser står sentralt i turismenæringen og har betydning både for bedrift og kunde. Denne artikkelen tar for seg hvordan verdi kan forstås fra både kunde- og bedriftsperspektiv. Studien sammenholder finansiell verdi og kundeverdi gjennom kvalitativ analyse av regnskaper og kundeomtaler for to reiselivsbedrifter med fokus på opplevelser. Analysen av kunders opplevde verdi, synliggjør ... -
Discovery and Biosynthetic Investigation of a New Antibacterial Dehydrated Non‐Ribosomal Tripeptide
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-27)Dehydroalanine (Dha) and dehydrobutyrine (Dhb) display considerable flexibility in a variety of chemical and biological reactions. Natural products containing Dha and/or Dhb residues are often found to display diverse biological activities. While the (Z) geometry is predominant in nature, only a handful of metabolites containing (E)‐Dhb have been found thus far. Here we report discovery of a new ...
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