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The Image Fallacy: Rethinking the Tragedy of the Commons
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-05)An image is what we have in our head and what we make up in an allegory, a name, a metaphor, a text, a map or in a drawing. None of these should be confused with the thing that is being imagined. They are not the real thing, just our imaginations of it. Still, we could not do without them, for instance when governing small-scale fisheries. They make us understand what we are up to and the track we ... -
Discovery and structural assignment of (S)-sydosine from amphipod-derived Aspergillus sydowii MBC15-11F through HRMS, advanced Mosher, and molecular modelling analyses
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-07-21)Aims - This study aims to prioritize fungal strains recovered from under-explored habitats that produce new metabolites. HRMS dereplication is used to avoid structure redundancy, and molecular modelling is used to assign absolute configuration.<p> <p>Methods and results - MBC15-11F was isolated from an amphipod and identified using ITS, 28S, and β-tubulin phylogeny as Aspergillus sydowii. Chemical ... -
Adjusting the Fitting of Fluorescence-Based Dose-Response Kinase Inhibition Assay to Account for Fluorescent Inhibitors
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-11)Fluorescence is routinely used to monitor kinase inhibition in commercial assays. Occasionally fluorescent compounds can interfere with the fluorescent reading. To address this issue, the problematic data are usually truncated to improve the fit, however, this approach raises ethical and reproducibility concerns. Instead, it is suggested to adjust the fitting formula, to account for the autofluorescence ... -
Marine heatwaves are not a dominant driver of change in demersal fishes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-30)Marine heatwaves have been linked to negative ecological effects in recent decades1,2. If marine heatwaves regularly induce community reorganization and biomass collapses in fishes, the consequences could be catastrophic for ecosystems, fisheries and human communities3,4. However, the extent to which marine heatwaves have negative impacts on fish biomass or community composition, or even whether ... -
Choice of climate risk adaptive measures in shrimp farming—A case study from the Mekong, Vietnam
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-06)Extreme climate events challenge the livelihoods of shrimp farmers worldwide. A comprehensive analysis of farmers’ choices of adaptive measures is essential for developing approaches that can lessen the effects of these climate risks. This study presents the determinants that influence the choice of adaptive measures in response to two climate risks, drought, and irregular weather, using a survey ... -
Anti-microbial activity and immunomodulation of recombinant hepcidin 2 and NK-lysin from flounder (Paralichthys olivaceus)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-21)Infections due to pathogens impact global aquaculture economy, where diseases caused by bacteria should be in particular focus due to antibiotic resistance. Hepcidin and NK-lysin are important innate immune factors having potential to be exploited as alternatives to antibiotics due to their antimicrobial activity and immunomodulatory capacity. In this study, the recombinant proteins of hepcidin 2 ... -
Growth strategies of Chlorella vulgaris in seawater for a high production of biomass and lipids suitable for biodiesel
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-09)Chlorella vulgaris is a freshwater microalga that synthesises large amounts of saturated lipids, which makes it suitable for production of bioenergy and biofuels. Since its cultivation usually requires freshwater, it competes with agriculture, economic development and ecological conservation for this limited natural resource. This study investigated the possibility of the partial replacement of ... -
Revealing the Host-Dependent Nature of an Engineered Genetic Inverter in Concordance with Physiology
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-16)Broad-host-range synthetic biology is an emerging frontier that aims to expand our current engineerable domain of microbial hosts for biodesign applications. As more novel species are brought to “model status,” synthetic biologists are discovering that identically engineered genetic circuits can exhibit different performances depending on the organism it operates within, an observation referred ... -
Does soak time influence the effect of artificial light on catch efficiency in snow crab (Chionoecetes opilio) pot fishery?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-09)In the Barents Sea commercial snow crab (Chionoecetes opilio) fishery, an increase in catch efficiency of the conical pots is important for the profitability of the industry. Light emitting diodes (LEDs) have previously been tested for increasing catch efficiency of the snow crab pots. These earlier experiments have shown varying results ranging from large increase in snow crab catches to no ... -
Kvalitetsutfordringer på stor snurrevadtorsk - årsaker og mulige tiltak
(Research report; Forskningsrapport, 2024-01-22)Stor snurrevadfanget fisk har andre typer skader enn fisk som er fanget med andre redskap, eksempelvis garn. Målsettingen med arbeidet som presenteres her var å kartlegge type og omfanget av skader på stor snurrevadfanget torsk, samt finne årsakene til slike skader. Det synes å bli flere innvendige skader på snurrevadfanget fisk, slik som knekt rygg og bloduttredelser nær svømmeblæra. Disse ... -
How to conduct more systematic reviews of agent-based models and foster theory development - Taking stock and looking ahead
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-15)Agent-based models (ABMs) are increasingly utilized in ecology and related fields, yet concerns persist regarding the lack of consideration for lessons learned from previous models. This study explores the potential of systematically conducted ABM reviews to contribute to cumulative science and theory development by synthesizing individual ABM findings more effectively. We are conducting a meta-review ... -
Fungi and Actinobacteria: Alternative Probiotics for Sustainable Aquaculture
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-25)Aquatic animals are continually being exposed to stressors under farming conditions, increasing risks to gut health that result in dysbiosis. Since restrictions are imposed on the frequent use of antibiotics in aquaculture, there is emerging demand for economically viable, environmentally safe, and sustainable alternatives for the intensive production of aquaculture species. The application ... -
Improving the size selectivity and exploitation pattern of cocktail shrimp (Trachypenaeus curvirostris) in shrimp trawl fishery of the South China Sea
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-13)In order to improve the size selectivity and exploitation pattern for cocktail shrimp (Trachypenaeus curvirostris) in shrimp trawl fishery of the South China Sea (SCS), selective properties of four codends were tested and compared. These experimental codends involved two mesh sizes, 30 and 35 mm, and two mesh shapes, diamond-mesh (T0) and diamond-mesh turned by 90 degree (T90), respectively. Our ... -
Mucosal and systemic physiological changes underscore the welfare risks of environmental hydrogen sulphide in post-smolt Atlantic salmon (Salmo salar)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-04)Atlantic salmon (Salmo salar) might encounter toxic hydrogen sulphide (H<sub>2</sub>S) gas during aquaculture production. Exposure to this gas can be acute or chronic, with heightened levels often linked to significant mortality rates. Despite its recognised toxicity, our understanding of the physiological implications of H<sub>2</sub>S on salmon remains limited. This report details the mucosal and ... -
Environmental impacts of aquaculture and coexcisting industries
(Research report; Forskningsrapport, 2023)This is the final report for the project "Environmental impact of aquaculture and coexisting industries - scope for comprehensive regulation" - "MILJØREG". The project is funded by the Norwegian Fisheries and Aquaculture Industry's research funding. The main goal of the project has been to prepare a broad overview of the knowledge base related to the environmental impact of aquaculture, as well ... -
Hepatic melanomacrophage centers in the arctic cultured fish Cyclopterus lumpus are not indicative of its health state
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-11-26)The lumpfish, Cyclopterus lumpus, holds significant promise as a candidate for large-scale aquaculture production, particularly in its role as a cleaner fish used to manage sea lice infestations in Atlantic salmon Salmo salar farming. Melanomacrophage centers (MMCs) represent polymorphic structures present in the hemolymphopoietic organs of various vertebrates, serving as a widely applicable ... -
Effect of rotational harvesting on the size composition of Cape rock oysters Striostrea margaritacea on the east coast of South Africa
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-11)A commercial fishery for the Cape rock oyster Striostrea margaritacea along the north coast of KwaZulu-Natal, South Africa (western Indian Ocean), follows a 4-year rotational cycle, with each harvest year followed by 3 fallow years across four harvest zones. We analysed reported harvesting effort and catch information, and fishery-independent oyster size composition data collected over 18 years (Feb ... -
Anatomical distribution of scavenger endothelial cells in bony fishes (Osteichthyes)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-28)The scavenger endothelial cells (SECs) of vertebrates are an important class of endocytic cells responsible for clearance of foreign and physiological waste macromolecules, partitioning in the immune system, functioning as a cellular powerplant by producing high energy metabolites like lactate and acetate. All animal phyla possess SECs, but the tissue localization of SECs has only been investigated ... -
The structure of Norwegian seafood trade
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-11-30)While seafood is a highly traded commodity, lack of data has largely prevented examination of the firms and industries that are conducting the actual transactions. In this paper we use highly disaggregated data to provide an overview of the seafood exports from Norway, the world’s 2nd largest seafood exporting country, and a country where fisheries as well as aquaculture are important industries. ... -
Alternative materialer til plast brukt i snurrevadtau og trålmatter
(Research report; Forskningsrapport, 2023-10-30)Dette prosjektet studerte ulike løsninger for å redusere effekten av slitasje fra fossilbasert, ikke-nedbrytbare plastmaterialer som brukes i snurrevad og trålmatter. Prosjektet testet ulike natur-, syntetiske og biologisk nedbrytbare materialer i laboratorium og i felt. Prosjektet kvantifiserte og sannsynliggjorde hvor mye reduksjon i utslipp ulike tiltak og løsninger kan bidra med. Det inkluderes ...