Fakultet for biovitenskap, fiskeri og økonomi: Nye registreringer
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Mining various genomic resources to resolve old alpha-taxonomy questions: A test of the species hypothesis of the Proteocephalus longicollis species complex (Cestoda: Platyhelminthes) from salmonid fishes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-24)High-throughput sequencing strategies became commonly employed to study non-model parasites, but the corresponding genomes and transcriptomes were seldom mined following the original publication. Similar to the data generated with genome skimming techniques based on shallow-depth shotgun gen omes, various genomic and transcriptomic resources can be screened for useful molecular phylogenetic markers ... -
Comparative analysis of the cytoarchitecture of the excretory bladder of adult Digenea (Platyhelminthes) with consideration of the presence of mineralized excretory corpuscles in marine and freshwater adult worms
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-01)The ultrastructural differences are shown between the cytoarchitecture of the excretory bladder and excretory inclusions in four digenean species, two azygiids, the marine Otodistomum cestoides and the freshwater Azygia lucii, the marine derogenid Derogenes varicus and the freshwater allocreadiid Acrolichanus auriculatus. The unusual cytoarchitecture of the bladder epithelium of the azygiid digeneans, ... -
Simple pot modification improves catch efficiency and species composition in a tropical estuary mud crab (Scylla serrata) fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-08)Pots are widely used fishing gear type for targeting different crustacean and fish species. Pot entrance size and design are among the most important technical parameters that influence the catch efficiency of certain species. An optimal pot entrance design should allow an efficient entry for the target species while preventing subsequent escape. The tropical estuary pot fishery targeting mud crab ... -
Impact of ground gear design on catch efficiency in demersal trawl fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-03)The choice of ground gear design in demersal trawls can significantly affect both catch composition and efficiency. The preference for a specific design depends on the fishing ground. In the North-Eastern Mediterranean, two types of ground gears, Single Line and Double Line are commonly used. Therefore, this study compared the catch performance for trawls using these ground gears during research ... -
Effect of artificial lights on catch efficiency and capture patterns in Asian paddle crab (Charybdis japonica) gillnet fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-07-22)The gillnet fishery targeting Asian paddle crab (Charybdis japonica) is an important commercial fishery in the Yellow Sea of China. However, low catch rates represent a challenge, and solutions for improving the catch efficiency are crucial for economical sustainability in this fishery. Therefore, we tested whether the use of artificial fishing lights could improve gillnet catch performance. ... -
Testing of hook sizes and appendages to reduce yelloweye rockfish bycatch in a Pacific halibut longline fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-03)In Pacific halibut (Hippoglossus stenolepis) longline fisheries in the eastern North Pacific Ocean bycatch of yelloweye rockfish (Sebastes ruberrimus) is a concern as their stock status along the U.S. West Coast is “rebuilding” from being “overfished”, the southeast Alaska stock has shown a ∼60% decline since at least 1994 and through 2015 where it stabilized, and the Canadian stock has been recently ... -
Comparison of physical properties and fishing performance between biodegradable PLA and conventional PA trammel nets in grey mullet (Mugil cephalus) and red-lip mullet (Liza haematocheila) fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-16)Marine plastic pollution and continuous capture of marine animals, so-called “ghost fishing”, by abandoned, lost, or otherwise discarded fishing gear (ALDFG) are global concerns. This study investigated whether biodegradable polylactic acid (PLA) monofilaments can be used to replace conventionally used non-biodegradable polyamide (PA) in trammel net fishery for limiting ALDFG associated effects. It ... -
Biological timekeeping in polar environments: lessons from terrestrial vertebrates
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-30)The polar regions receive less solar energy than anywhere else on Earth, with the greatest year-round variation in daily light exposure; this produces highly seasonal environments, with short summers and long, cold winters. Polar environments are also characterised by a reduced daily amplitude of solar illumination. This is obvious around the solstices, when the Sun remains continuously above (polar ... -
Sea, fish, and resource management in the High North
(Chapter; Bokkapittel, 2023)With more than five times the land area of the kingdom, Norway’s oceans extend from 55 degrees north in the North Sea to 85 degrees north in the Arctic Ocean north of Svalbard – a distance of more than 3,000 kilometres. More than 80 per cent of these sea areas lies to the north of the Arctic Circle. As for natural resources, these sea areas are very productive and sustain large commercial fisheries. ... -
Sustainability and justice: farm animals in rural tourism and lessons to be learned
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12)Farm animals are virtually ignored in tourism studies concerning sustainability and justice. This study argues that this conflicts with animal ethics and is a missed opportunity to reflect on sustainability and justice in tourism. It adopts an ecofeminist care ethics perspective and conducts autoethnographic research into farm animals, considered ‘silenced’ individuals belonging to a marginalised ... -
The gift of community
(Book; Bok, 2023)This book is a followup, or a continuation rather, of the one I published in 2019 as part of the Too Big To Ignore (TBTI) Global Book Series, titled ‘Life Above Water: Essays on Human Experiences of Small-Scale Fisheries’. The design and purpose of the current book are the same. The introduction in the 2019 book could also work here, even if this book has a sharper focus on communities. Both consist ... -
Comparative assessment of Chinese mitten crab aquaculture in China: Spatiotemporal changes and trade-offs
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-12)The increasing human demand for high-quality animal protein has provided impetus for the development of aquaculture. Chinese mitten crab (Eriocheir sinensis) is a catadromous species rapidly being cultured in China but scientific literature documenting its life cycle environmental and economic consequences remains scarce. This study aims to address this gap by examining the spatio-temporal evolution ... -
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 ... -
Quantifying zoobenthic blue carbon storage across habitats within the Arctic’s Barents Sea
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-26)Introduction: The Arctic sea ice extent in September (when it is at its lowest) has declined 13% Q10 per decade, and the Arctic Ocean is becoming a more Atlantic-influenced system. Rapid climate-forced changes are taking place in many high-latitude marine ecosystems. The Barents Sea is one such highlatitude shelf ecosystem, between approximately 70° and 80°N in the Norwegian Arctic. The purpose ... -
Grazing intensity drives a trophic shift in the diet of common alpine birds
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-18)Large mammalian herbivores (LMH) shape vertebrate communities and structure food webs in many terrestrial ecosystems. However, the mechanisms that underlie the effects of LMH on other vertebrates are poorly understood. In France, domestic LMH have grazed alpine and mountain grasslands for thousands of years, profoundly influencing landscapes and wildlife. As LMH modify habitat structure, favour ...