Fakultet for biovitenskap, fiskeri og økonomi: Nye registreringer
Viser treff 781-800 av 5173
-
Age class composition and growth of Atlantic cod (Gadus morhua) in the shallow water zone of Kongsfjorden, Svalbard
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-26)Although Atlantic cod has been observed in Svalbard waters since the 1880s, knowledge about the presence in the Arctic shallow water zone is limited. The regular catch of juvenile Atlantic cod in Kongs orden since 2008 is in line with an overall northward shift of boreal fish species toward the Arctic. This is the first study showing the age class composition, growth rates, and stomach content ... -
Food Safety Risks Posed by Heavy Metals and Persistent Organic Pollutants (POPs) related to Consumption of Sea Cucumbers
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-09)The global production of sea cucumbers was 245 thousand tons in 2020. Sea cucumbers are important food items in Asian and Pacific cuisines, the highest proportion being consumed in China as “bêche-de-mer” dried, gutted, boiled and salted body wall. However, consumption of sea cucumbers is expanding in China and globally, and the high demand has led to decline in populations of sea cucumbers, due to ... -
Bioassay-Guided Fractionation Leads to the Detection of Cholic Acid Generated by the Rare Thalassomonas sp.
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-20)Bacterial symbionts of marine invertebrates are rich sources of novel, pharmaceutically relevant natural products that could become leads in combatting multidrug-resistant pathogens and treating disease. In this study, the bioactive potential of the marine invertebrate symbiont Thalassomonas actiniarum was investigated. Bioactivity screening of the strain revealed Gram-positive specific antibacterial ... -
Blowing in the Wind: Using a Consumer Drone for the Collection of Humpback Whale (Megaptera novaeangliae) Blow Samples during the Arctic Polar Nights
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-26)Abstract Analysis of cetacean blow offers a unique potential for non-invasive assessments of their health. In recent years, the use of uncrewed aerial vehicles (UAVs) has revolutionized the way these samples are collected. However, the high cost and expertise associated with purpose-built waterproof UAVs, paired with the challenges of operating during difficult meteorological conditions, can be ... -
CRISPR/Cas9-Mediated Gene Editing in Salmonids Cells and Efficient Establishment of Edited Clonal Cell Lines
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-19)Finfish production has seen over three-fold increase in the past 30 years (1990–2020), and Atlantic salmon (A. salmon; salmo salar) accounted for approximately 32.6% of the total marine and coastal aquaculture of all finfish species in the year 2020, making it one of the most profitable farmed fish species globally. This growth in production is, however, threatened by a number of problems which can ... -
Vertical redistribution of principle water masses on the Northeast Greenland Shelf
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-10)The Northeast Greenland shelf (NEGS) is a recipient of Polar Water (PW) from the Arctic Ocean, Greenland Ice Sheet melt, and Atlantic Water (AW). Here, we compile hydrographical measurements to quantify long-term changes in fjords and coastal waters. We find a profound change in the vertical distribution of water masses, with AW shoaling >60 m and PW thinning >50 m since early 2000’s. The properties ... -
Plant defense under Arctic light conditions: Can plants withstand invading pests?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-24)Global warming is predicted to change the growth conditions for plants and crops in regions at high latitudes (>60° N), including the Arctic. This will be accompanied by alterations in the composition of natural plant and pest communities, as herbivorous arthropods will invade these regions as well. Interactions between previously non-overlapping species may occur and cause new challenges to herbivore ... -
Using camera traps to monitor cyclic vole populations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-02)Camera traps have become popular labor-efficient and non-invasive tools to study animal populations. The use of camera trap methods has largely focused on large animals and/or animals with identifiable features, with less attention being paid to small mammals, including rodents. Here we investigate the suitability of camera-trap-based abundance indices to monitor population dynamics in two species ... -
Semantic Segmentation in Underwater Ship Inspections: Benchmark and Dataset
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-23)In this article, we present the first large-scale data set for underwater ship lifecycle inspection, analysis and condition information (LIACI). It contains 1893 images with pixel annotations for ten object categories: defects, corrosion, paint peel, marine growth, sea chest gratings, overboard valves, propeller, anodes, bilge keel and ship hull. The images have been collected during underwater ... -
A stream-to-sea experiment reveals inhibitory effects of freshwater residency on organic-matter decomposition in the sea
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-17)One billion tons of carbon are annually transported to the global ocean, and the fate of this carbon hinges not only on marine processing rates, but also on freshwater processing during downstream transport. Using a cotton-strip assay, we assessed the decomposition of organic matter in marine and freshwater sites and simulated its downstream transport from freshwater to the sea by translocating ... -
Spatiotemporal Metabolic Network Models Reveal Complex Autotroph-Heterotroph Biofilm Interactions Governed by Photon Incidences
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-05)Autotroph-heterotroph interactions are ubiquitous in natural environment and play a key role in controlling various essential ecosystem functions, such as production and utilization of organic matter, cycling of nitrogen, sulfur, and other chemical elements. Understanding how these biofilm metabolic interactions are constrained in space and time remains challenging because fully predictive models ... -
Two pawns in their game - Inventory and customer efficiency
(Doctoral thesis; Doktorgradsavhandling, 2023-01-16)This thesis examines efficiency in the retail industry in two different directions. In the first setting, the link between inventory efficiency and performance is examined in relation to firm characteristics and exogenous explanatory variables. More specifically, in addition to general firm-specific characteristics, the effects of chain affiliation and time trends within retail chains is examined. ... -
Effect of the Nordmøre grid bar spacing on size selectivity, catch efficiency and bycatch of the Barents Sea Northern shrimp fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-27)The introduction of the Nordmøre grid in shrimp trawls has reduced the bycatch of non-target species. In the Norwegian Northern shrimp (Pandalus borealis) fishery, the mandatory selective gear consists of a Nordmøre grid with 19 mm bar spacing combined with a 35 mm mesh size diamond mesh codend. However, fish bycatch in shrimp trawls remains a challenge and further modifications of the gear that ... -
Behavioural responses of wild anadromous Arctic char experimentally infested in situ with salmon lice
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-24)Salmon lice can impact the marine behaviour, growth, and survival of salmonids, but little is known about their effects on Arctic char. We present behavioural responses from the first dose-response experiment with wild anadromous Arctic char (n = 50) infested in situ with salmon lice (0.0–1.2 lice g<sup>−1</sup> fish) in an area with low natural infestations. Infested fish spent less time at sea ... -
Environmental cues for healthy food marketing: The importance of in-store research into three conversions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-21)Since retailers control the space where consumers tend to make the vast majority of their food purchase decisions, they can take measures to promote healthy living. Increasing relative sales of healthy food can contribute to the ongoing battle against preventable lifestyle diseases. We show how retailers can use impression management and environmental cues in their stores to influence consumers' ... -
Uptake of sympagic organic carbon by the Barents Sea benthos linked to sea ice seasonality
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-11)On Arctic shelves, where primary production occurs in both the pelagic and sympagic (ice-associated) habitats, sympagic organic material (OM) can constitute a disproportionate fraction of benthic diets due to higher sinking rates and lower grazing pressure than pelagic OM. Less documented is how sympagic OM assimilation across feeding guilds varies seasonally and in relation to sea ice duation. We ... -
Historic changes in abundance, biomass and taxonomic composition of seaweed-associated fauna in Kongsfjorden, Svalbard
(Master thesis; Mastergradsoppgave, 2022-11-15)The Arctic is warming rapidly. Atmospheric temperatures in the Barents Sea region are increasing 5 – 7 times faster than the global average. As a result, Arctic sea ice extent is declining by nearly 12% per decade during the summer months. The study site in Kongsfjorden, Svalbard, has been mostly ice free since 2006. These changes in the physical environment likely affect the ecology of coastal ... -
GATA-3 in Atlantic salmon (Salmo salar): Tissue distribution and its regulation of IL-4/13a promoter
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-14)GATA3 is a transcription factor that plays an important role in T cell lineage differentiation and T-helper 2 (Th2) type immune responses. In this study, we developed two rat antibodies against Atlantic salmon GATA-3 (anti-rSsGATA-3a and anti-rSsGATA-3b, respectively). The western blotting and immunofluorescence results showed that anti-rSsGATA-3b antibodies recognized endogenous SsGATA-3 proteins, ... -
Experimental evidence for species-specific adherence of nanoplastic particles in Arctic phytoplankton communities
(Master thesis; Mastergradsoppgave, 2022-11-15)Plastic debris are ubiquitous, and the Arctic is no exception. Despite the relatively low population number around the Arctic, abundances of microplastic litter are like those of the most polluted subtropical areas. Micro- and nanoplastics have been found in Arctic fauna, but due to constraints in methodology, measurements of nanoplastics in sea water have not been carried out yet. Micro- and ... -
Spectator Interest in Attending Future Danish Men’s National Soccer Team Matches: A Study of Demand
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022)Existing research on spectator demand tends to focus primarily on elite club sport. This paper aims to expand on the literature by applying regression models to a large and unique set of survey data collected from Danish men’s national soccer team matches held from 2013 to 2017. The output from our models suggests that the number of matches attended is positively related to future demand, as ...