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Håndbok for levendefangst og levendelagring av fisk – bedre kvalitet og velferd
(Research report; Forskningsrapport, 2024)Fiske og fangst har en lang historie i Norge. Konservering av fisk har foregått med tørking, salting eller kombinasjoner av disse. For flere arter som torsk, sei, flyndre, sild, brisling og ål har også lagring levende i kortere eller lengre perioder vært viktig. <p> <p>Denne håndboken handler hovedsakelig om levendelagring av snurrevadfanget torsk. Bruk av andre fangstredskap er inkludert. Det ... -
Ghost fishing efficiency in swimming crab (Portunus trituberculatus) pot fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-24)Abandoned, lost, or otherwise discarded fishing gear (ALDFG) is a global challenge that negatively affects marine environment through plastic pollution and continued capture of marine animals, so-called “ghost fishing”. In different pot fisheries, ghost fishing related to ALDFG is of concern, including pot fishery targeting swimming crab (Portunus trituberculatus). This study quantified the ghost ... -
Industrial CO2 capturing by mass cultivation of microalgae (diatoms): Processes, sustainability and applications
(Chapter; Bokkapittel, 2024-06-03)In the 2012–2013 academic year, a research group at UiT The Arctic University of Norway, with expertise in the physiology and ecology of planktonic microalgae, took on the challenge to test industrial mass cultivation of certain species of microalgae. This ambition was driven by the increasing focus on photoautotrophic (photosynthetic) microalgae as future biofuels, as well as a source of feed and ... -
The sustainable development goals, human rights, and the capability approach in an Arctic context
(Chapter; Bokkapittel, 2024-06-03)This chapter discusses how an industry–university collaboration between ferrosilicon producer Finnfjord AS in northern Norway and UiT The Arctic University of Norway contributes to the mission of operationalising the United Nations Sustainable Development Goals (SDGs). The core of the project is to capture CO2 by means of microalgae cultivation on an industrial scale. The microalgae, rich in omega-3 ... -
A Guide to Re-implementing Agent-Based Models: Experiences from the HUMAT Model
(Chapter; Bokkapittel, 2024-07-21)Replicating existing agent-based models poses significant challenges, particularly for those new to the field. This article presents an all-encompassing guide to re-implementing agent-based models, encompassing vital concepts such as comprehending the original model, utilizing agent-based modeling frameworks, simulation design, model validation, and more. By embracing the proposed guide, researchers ... -
The future Barents Sea—A synthesis of physical, biogeochemical, and ecological changes toward 2050 and 2100
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-02-21)The Barents Sea is a hotspot for ongoing Arctic climate change, manifested in a rapid warming of the ocean and the atmosphere and a strong decline of the winter sea-ice cover. These changes in the physical environment have large consequences for marine ecosystems, including commercial fish populations. In a warmer future climate, both physical and ecological changes are expected to intensify. ... -
“Influence of short-to-continuous and continuous photoperiods combined with elevated temperatures on sexual maturation in lumpfish (Cyclopterus lumpus, L. 1758)”
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-12-02)We tested the photothermal effects on sexual maturation in the broodstock of lumpfish (Cyclopterus lumpus) using short-to-continuous (LDL) and continuous (LL) photoperiods for 24 weeks, with temperature elevation during final maturation in females. The lumpfish sexual maturation was phased differently between the two photoperiods, while temperature elevation enhanced the photoperiod changes. Female ... -
Towards an integrative morpho-molecular classification of the Lulworthiomycetidae
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-02-21)This study re-evaluates the classification of the Lulworthiomycetidae based on phylogenetic analyses of 18S, 28S and ITS (internal transcribed spacers and 5.8S) regions of rDNA and protein coding genes (TEF1α, RPB1, RPB2, TUB2, MCM7) along with comprehensive morphological comparisons. Based on the current phylogenetic data we consider the genus Spathulospora as a member of the Lulworthiales, ... -
Allochrony in Atlantic Lumpfish: Genomic and Otolith Shape Divergence Between Spring and Autumn Spawners
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-02-14)Allochrony is a form of reproductive isolation characterized by differences in the timing of spawning and may play a crucial role in the genetic and phenotypic divergence within species. The Atlantic lumpfish (Cyclopterus lumpus) is known to spawn in spring and autumn. However, the role of allochrony on the genomic structure of this species has not been addressed. Here, by combining whole ... -
Short-term evolutionary implications of an introgressed size-determining supergene in a vulnerable population
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-01-27)The Thorny Skate (Amblyraja radiata) is a vulnerable species displaying a discrete size-polymorphism in the northwest Atlantic Ocean (NWA). We conducted whole genome sequencing of samples collected across its range. Genetic diversity was similar at all sampled sites, but we discovered a ~ 31 megabase bi-allelic supergene associated with the size polymorphism, with the larger size allele having ... -
Morphological evidence supports splitting of species in the North Atlantic Sebastes spp. complex
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-02-06)The redfishes (genus Sebastes) are long-lived, commercial species in the North Atlantic. Excessive harvest through decades has led to a decline in the mature population of golden redfish (Sebastes norvegicus) in Norwegian waters, which is currently considered severely depleted. Accumulating genetic evidence suggests a more complex structure within this genus in the North Atlantic, which has ... -
A photonic sensor system for real-time monitoring of turbidity changes in aquaculture
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-10-08)Objective - The objective of this study was to test the compatibility and performance of a developed photonic sensor system, which can serve as a dependable and practical device for continuous monitoring of turbidity changes in aquaculture tanks.<p> <p>Methods - The fabricated photonic sensor system consisted of an integrated data logger and sensor probe. The sensor probe exhibited a precise ... -
Preferences for Intuition and Deliberation in Decision-Making in the Public Sector: Cross-Cultural Comparison of China, Taiwan, the Philippines, and the USA
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-12)This paper explores hypotheses based on Hofstede’s cultural framework showing that decision-makers’ culture impacts their implicit choice. How people make decisions is tested through the behavioral dimension preference for intuition/preference for deliberation based on data from 1,233 employees in China, Taiwan, the Philippines, and the USA. This study reveals significant variation in individuals’ ... -
A fishy gut feeling – current knowledge on gut microbiota in teleosts
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-01-10)The importance of the gastrointestinal microbiota (GM) in health and disease is widely recognized. Although less is known in fish than in mammals, advances in molecular techniques, such as 16S rRNA sequencing, have facilitated characterization of fish GM, comprising resident autochthonous and transient allochthonous bacteria. The microbial diversity and composition are strongly influenced by diet. ... -
Five millennia of mitonuclear discordance in Atlantic bluefin tuna identified using ancient DNA
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-02-07)Mitonuclear discordance between species is readily documented in marine fishes. Such discordance may either be the result of past natural phenomena or the result of recent introgression from previously seperated species after shifts in their spatial distributions. Using ancient DNA spanning five millennia, we here investigate the long-term presence of Pacific bluefin tuna (Thunnus orientalis) and ... -
A vision for global eDNA-based monitoring in a changing world
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-15)Environmental DNA (eDNA) has opened promising avenues for establishing standardized, cost-efficient monitoring of biodiversity. However, comprehensive and systematic implementation is urgently needed to address the current biodiversity crisis. Here, we envision a global eDNA biomonitoring scheme, which could potentially revolutionize the understanding and conservation of life on Earth. -
Metabolomics-Guided Discovery of Bipolarolides H−O, New Ophiobolin-Type Sesterterpenes with Antibacterial Activity from the Marine-Derived Fungus Uzbekistanica storfjordensis sp. nov.
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-01-30)A marine-derived Pleosporales fungus, Uzbekistanica storfjordensis, was isolated from driftwood and described as a new species. The fungus was cultivated in liquid media and a molecular networking-driven approach was used to identify potential new secondary metabolites. The targeted compounds were isolated using preparative HPLC-MS, and through extensive spectroscopic analysis, eight new ophiobolin-type ... -
Effect of mesh size in monofilament and multifilament gillnets on catch efficiency in the Black Sea whiting (Merlangius merlangus) fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-26)Gillnets are widely used fishing gear for targeting various fish species. Gillnet fisheries use different gear configurations such as different mesh sizes and number of netting twines (mono- or multifilament) depending on the species targeted. Gillnet fishery targeting whiting (Merlangius merlangus) is one of the economically important year-round fisheries in the Black Sea. However, large bycatch ... -
Use of floated gillnet to reduce flatfish bycatch in a mixed-species gillnet fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-24)Bycatch of threatened flatfish species is a major concern in mixed-species bottom-set gillnet fisheries in the Yellow Sea, China. Therefore, we tested floated gillnets against standard bottom-set gillnets to reduce bycatch by exploiting difference in species-specific fish behavior. Our results demonstrated that the floated gillnet design can greatly improve species and size selectivity. Floated ... -
Semi-pelagic trawling in the U.S. West Coast groundfish bottom trawl fishery: Effects on catch efficiency and seafloor interactions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-15)Reducing the impacts of bottom trawling on seafloor habitats is a management priority in the U.S. West Coast groundfish bottom trawl fishery as well as other trawl fisheries internationally. Modifications to conventional bottom trawls, such as semi-pelagic trawl technology, are commonly used in demersal fisheries to reduce trawl-seafloor interactions by elevating the doors and portions of the sweeps ...
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