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norskFakultet for biovitenskap, fiskeri og økonomi
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Handelshøgskolen ved UiT [746]
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Flexibility in a changing arctic food web: Can rough-legged buzzards cope with changing small rodent communities?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-08-07)Indirect effects of climate change are often mediated by trophic interactions and consequences for individual species depend on how they are tied into the local food web. Here we show how the response of demographic rates of an arctic bird of prey to fluctuations in small rodent abundance changed when small rodent community composition and dynamics changed, possibly under the effect of climate ... -
Absorptive capacity and energy efficiency in manufacturing firms – An empirical analysis in Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-02)Increased energy efficiency (EE) in manufacturing firms is important for confronting climate challenges. However, the information barrier is considered a major restriction on EE innovation. Building on the theory of absorptive capacity and the current EE literature, we argue that this barrier relates to firms' ability to assimilate and exploit information. Thus, this study's objective is to analyse ... -
Hiding in the background: community-level patterns in invertebrate herbivory across the tundra biome
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-09-03)Invertebrate herbivores depend on external temperature for growth and metabolism. Continued warming in tundra ecosystems is proposed to result in increased invertebrate herbivory. However, empirical data about how current levels of invertebrate herbivory vary across the Arctic is limited and generally restricted to a single host plant or a small group of species, so predicting future change remains ... -
The radiation exposure of fish in the period of the Techa river peak contamination
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-10)Waterborne radioactive releases into the Techa River from the Mayak Production Association in Russia during 1949–1956 resulted in downstream contamination of the river ecosystem. The discharged liquid waste contained both short-lived isotopes (95Zr, 95Nb, 103,106Ru, 141,144Ce, 91Y, 89Sr and 140Ba with half-life from 3 days to 1.02 years) and the long-lived 90Sr and 137Cs (half-life - 28.79 y and ... -
Sticky mucilages and exudates of plants – putative microenvironmental design elements with biotechnological value
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-09-24)Plants produce a wide array of secretions both above and below ground. Known as mucilages or exudates, they are secreted by seeds, roots, leaves and stems and fulfil a variety of functions including adhesion, protection, nutrient acquisition and infection. Mucilages are generally polysaccharide‐rich and often occur in the form of viscoelastic gels and in many cases have adhesive properties. In some ... -
GDPR – til glede eller besvær? En kvalitativ case studie av hvordan ledere og ansatte i en lokalbank i Nord-Norge håndterer GDPR
(Master thesis; Mastergradsoppgave, 2019-11-28)Våren 2018 gjorde en ny personvernlov, General Data Protection Regulation sitt inntog og ble gjeldende for alle organisasjoner i EU. Loven skal bidra til at kundenes personopplysninger ivaretas på best mulig måte gjennom sikker og trygg innsamling, behandling, lagring og sending. Loven medfører derfor at organisasjoner er nødt til å endre rutiner og arbeidsmetoder. En organisasjonsendring slik som ... -
Fra liten gründerbedrift, til stor vekstbedrift – hva skyldes suksessen? Lederne i KOA sine betraktninger – en kvalitativ casestudie
(Master thesis; Mastergradsoppgave, 2019-11-26)I denne masteroppgaven har jeg tatt for meg hva ledelsen i KOA har vektlagt i prosessen fra liten gründerbedrift til stor vekstbedrift. Jeg har med utgangspunkt i teori om organisasjoners livssyklus (vekstfaseteori) tatt for meg de naturlige endringene i lederutfordringene når KOA vokste, og hvordan ledergruppa løste disse utfordringene. Videre har jeg med utgangspunkt i forskning rundt faktorer som ... -
Norwegian cod by-products in the Chinese market
(Master thesis; Mastergradsoppgave, 2019-05-14)This thesis is dedicated to studying the main factors which could affect Norwegian cod by-products in the Chinese market. Norway has been recognized as one of the biggest seafood countries in the world while China shows a preference towards Norwegian seafood. And due to the relationship has been better in the past few years between these two countries, it is worthy to discuss Norwegian seafood ... -
Assessing the effect of predator control on an endangered goose population subjected to predator-mediated food web dynamics
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-29)<ol> <li>Assessing the effectiveness of conservation actions to halt population declines is challenging when confounded by other factors. We assessed whether culling of red fox, a predator currently increasing in number in the sub‐Arctic, contributed to recent recovery of the critically endangered Fennoscandian population of Lesser White‐fronted Goose <i>Anser erythropus</i>, while controlling for ... -
Differences in smolt status affect the resistance of Atlantic salmon (Salmo salar L.) against infectious pancreatic necrosis, while vaccine-mediated protection is unaffected
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-18)In today's aquaculture of Atlantic salmon (<i>Salmo salar</i> L.), a majority of viral disease outbreaks occur after seawater transfer. A relevant question is how the parr–smolt transformation influences the efficacy of viral vaccines and the innate resistance against viral diseases. In this study, vaccinated and unvaccinated A. salmon parr were exposed to different photoperiodic regimens (1‐, 3‐ ... -
High resistance to climatic variability in a dominant tundra shrub species
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-05)Climate change is modifying temperature and precipitation regimes across all seasons in northern ecosystems. Summer temperatures are higher, growing seasons extend into spring and fall and snow cover conditions are more variable during winter. The resistance of dominant tundra species to these season-specific changes, with each season potentially having contrasting effects on their growth and survival, ... -
Review on Immersion Vaccines for Fish: An Update 2019
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-11-29)Immersion vaccines are used for a variety of aquacultured fish to protect against infectious diseases caused by bacteria and viruses. During immersion vaccination the antigens are taken up by the skin, gills or gut and processed by the immune system, where the resulting response may lead to protection. The lack of classical secondary responses following repeated immersion vaccination may partly be ... -
Arctic greening and bird nest predation risk across tundra ecotones
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-01)Alarming global-scale declines of bird numbers are occurring under the changing climate, and species belonging to alpine and Arctic tundra are particularly affected. Increased nest predation appears to be involved4, but the mechanisms linking predation to climate change remain to be shown. Here we test the prediction from food web theory that increased primary productivity (greening of tundra) in a ... -
Cost-benefit analysis of aquaculture expansion in Arctic Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-22)According to governmental plans, Norway faces huge expansions in the production of farmed Atlantic salmon. However, it is municipalities that designate coastal areas to aquaculture activities and their motivation depends on net benefits at municipal level from such use. Yet, there is little empirical evidence on costs and benefits of using coastal areas to aquaculture activities. We set up a ... -
Genus bacillus, promising probiotics in aquaculture: Aquatic animal origin, bio-active components, bioremediation and efficacy in fish and shellfish
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-04-07)Species of <i>Bacillus</i> are spore-forming bacteria that are resistant to aggressive physical and chemical conditions, with various species showing unusual physiological features enabling them to survive in various environmental conditions including fresh waters, marine sediments, desert sands, hot springs, Arctic soils, and the gastrointestinal tract of finfish and shellfish. They are able to ... -
Effects of Assam tea extract on growth, skin mucus, serum immunity and disease resistance of Nile tilapia (Oreochromis niloticus) against Streptococcus agalactiae
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-27)The present study aimed to assess the possible effects of Assam tea (<i>Camellia sinensis</i>) extract (ATE) on growth performances, immune responses, and disease resistance of Nile tilapia, <i>Oreochromis niloticus</i> against <i>Streptococcus agalactiae</i>. Five levels of ATE were supplemented into the based diet at 0, 1, 2, 4, and 8 g kg<sup>−1</sup> feed of Nile tilapia fingerlings (10.9 ± 0.04 g ... -
Climate warming is predicted to enhance the negative effects of size-selective harvesting on lake fish
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-11-05)<ol> <li>Ecosystems at high latitudes are exposed to some of the highest rates of climate warming on earth, and freshwater ecosystems in those regions are already experiencing extended ice‐free seasons and warmer waters. The dominant fish species in these ecosystems are cold‐water salmonids, which play a central ecological role in lake ecosystems, where they are often exposed to size‐selective ... -
Biodiversity assessment of tropical shelf eukaryotic communities via pelagic eDNA metabarcoding
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12-03)Our understanding of marine communities and their functions in an ecosystem relies on the ability to detect and monitor species distributions and abundances. Currently, the use of environmental DNA (eDNA) metabarcoding is increasingly being applied for the rapid assessment and monitoring of aquatic species. Most eDNA metabarcoding studies have either focussed on the simultaneous identification of a ... -
Assisting sustainable food consumption: The effects of quality signals stemming from consumers and stores in online and physical grocery retailing
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12-03)Increased fish consumption can contribute to a more sustainable food system. This paper explores how signaling affects consumer choices in fresh fish purchasing situations, both in traditional and online retail settings. We examined two different types of market signals; quality signals stemming from consumers as a social proof and authority signals coming from stores. Study 1 showed that quality ... -
DNA metabarcoding reveals modern and past eukaryotic communities in a high-mountain peat bog system
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-09-30)Peat bogs located in high mountains are suitable places to study local environmental responses to climate variability. These ecosystems host a large number of eukaryotes with diverse taxonomic and functional diversity. We carried out a metabarcoding study using universal 18S and COI markers to explore the composition of past and present eukaryotic communities of a Pyrenean peat bog ecosystem. We ...
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