Norges fiskerihøgskole: Recent submissions
Now showing items 821-840 of 1751
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Size selectivity and catch efficiency of bottom trawl with a double sorting grid and diamond mesh codend in the North-east Atlantic gadoid fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-28)This study investigated the size selectivity and catch efficiency in the North-east Atlantic demersal trawl fishery targeting cod (<i>Gadus morhua</i>) and haddock (<i>Melanogrammus aeglefinus</i>). The use of a sorting grid followed by a size selective codend is compulsory in this fishery. Experimental fishing was conducted with a commercially rigged trawl, flexigrid section, and diamond-mesh codend. ... -
Antimicrobial activity of small synthetic peptides based on the marine peptide turgencin A: Prediction of antimicrobial peptide sequences in a natural peptide and strategy for optimization of potency
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-30)Turgencin A, a potent antimicrobial peptide isolated from the Arctic sea squirt <i>Synoicum turgens</i>, consists of 36 amino acid residues and three disulfide bridges, making it challenging to synthesize. The aim of the present study was to develop a truncated peptide with an antimicrobial drug lead potential based on turgencin A. The experiments consisted of: (1) sequence analysis and prediction ... -
Dissemination of Piscine orthoreovirus-1 (PRV-1) in Atlantic Salmon (Salmo salar) during the Early and Regenerating Phases of Infection
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-20)<i>Piscine orthoreovirus-1</i> (PRV-1) can cause heart and skeletal muscle inflammation (HSMI) in farmed Atlantic salmon (<i>Salmo salar</i>), but the line of events from infection, pathologic change, and regeneration has not been thoroughly described. In this study, the cellular localization and variation of PRV-1 RNA and protein levels were analyzed at different times post-exposure in experimentally ... -
The Geopolitics of Fish in the Arctic
(Research report; Forskningsrapport, 2020)Climate change and declining sea-ice in the Central Arctic Ocean (CAO) has brought concerns that fish stocks may expand into the high Arctic. While the sub-Arctic seas of the North Pacific and the North Atlantic have abundant fish resources subject to major commercial fisheries for generations, the CAO has little or none. Concerns that fish stocks could expand into the CAO provided the impetus for ... -
Profit and Resource Rent in Fisheries
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-19)The difference between the concepts of profit and rent are discussed theoretically and by using aggregated data from the Icelandic and Norwegian fish harvesting industries. The former is a basic indicator for gauging the business performance of firms and industries, and the latter is important for the evaluation of the economic welfare contribution of resources and industries. The importance of ... -
Testing a size sorting grid in the brown shrimp (Crangon Crangon Linnaeus, 1758) beam trawl fishery
(Journal article; Tidsskriftartikkel, 2020-08-12)The North Sea brown shrimp (<i>Crangon crangon</i> Linnaeus, 1758) fishery became Marine Stewardship Council (MSC) certified in 2017. As part of the certification, the fishermen proposed to incrementally increase the mesh size of the codend used from 22 mm to 26 mm. As this increase in mesh size could result in a substantial loss of marketable sized brown shrimp (shrimp with total length equal or ... -
Assessments and their status in international law
(Conference object; Konferansebidrag, 2020-03)The workshop addressed the issue of "environmental impact assessments" in the new implementation agreement under the law of the sea convention on biodiversity beyond national jurisdiction (BBNJ. This was the opening presentation. The purpose was to give a brief overview of different types of assessments and their status in international law. I also made several comments to the negotiations. At the ... -
Bioactivity of Serratiochelin A, a Siderophore Isolated from a Co-Culture of Serratia sp. and Shewanella sp.
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-14)Siderophores are compounds with high affinity for ferric iron. Bacteria produce these compounds to acquire iron in iron-limiting conditions. Iron is one of the most abundant metals on earth, and its presence is necessary for many vital life processes. Bacteria from the genus <i>Serratia</i> contribute to the iron respiration in their environments, and previously several siderophores have been isolated ... -
Towards enhancing trustworthiness of socially interactive and culture aware robots
(Journal article; Tidsskriftartikkel, 2014-05-05)Building fine-tuned socially believable autonomous agents interacting with humans in virtual environments is an important aspect of agent design, as humans are influenced more by virtual agents with a high degree of behavioral realism. However, modeling complex psychological processes such as the trust-building between humans and culturallyadaptable agents in a realistic manner is not a trivial task. ... -
Playing with the Past to Understand the Present: The potential of using Nusfjord (2017) to Teach About the Complexity of Fisheries as SocioEcological Systems
(Journal article; Tidsskriftartikkel, 2019-10-17)Games are vehicles that transport their players between different realties (Peters & Westelaken 2014). By doing this, they have the potential to provide many different benefits for their players, such as relaxation, excitement, social interaction, and learning. Higher education is increasingly trying to capitalize on this potential and many teachers now make use of different forms of game-based learning ... -
Computational Models That Matter During a Global Pandemic Outbreak: A Call to Action
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-31)The COVID-19 pandemic is causing a dramatic loss of lives worldwide, challenging the sustainability of our health care systems, threatening economic meltdown, and putting pressure on the mental health of individuals (due to social distancing and lock-down measures). The pandemic is also posing severe challenges to the scientific community, with scholars under pressure to respond to policymakers’ ... -
Safe production of farmed Atlantic salmon (Salmo salar)
(Research report; Forskningsrapport, 2010-06-17)This work contains a review of the undesirable substances that may be introduced as contaminants of natural and malicious origin, and of emerging hazards, in the production chain of farmed salmon,from ova to packed fillet.<p><p> The work, focused in the supply chain to European countries, contains a brief introduction to general food safety in relation to aquaculture products, followed by an ... -
Systems biology – Current status and challenges
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-13)We put together a special issue on current approaches in systems biology with a focus on mathematical modeling of metabolic networks. Mathematical models have increasingly been used to unravel molecular mechanisms of complex dynamic biological processes. We here provide a short introduction into the topics covered in this special issue, highlighting current developments and challenges. -
Description of the processes in the value chain and risk assessment of decomposition substances and oxidation products in fish Oils. Opinion of Steering Committee of the Norwegian Scientific Committee for Food Safety
(Research report; Forskningsrapport, 2011-10-19)The Norwegian Scientific Committee for Food Safety (VKM) has been asked by the Norwegian Food Safety Authority to perform a health risk assessment on decomposition substances and oxidation products in fish oils intended for human consumption except pharmaceuticals. Seal and/or krill oil intended for human consumption might be included but in separate chapters. EU’s hygiene regulations for the ... -
Enjoying the warming Mediterranean: Transcriptomic responses to temperature changes of a thermophilous keystone species in benthic communities
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-29)Information about the genomic processes underlying responses to temperature changes is still limited in non-model marine invertebrates. In this sense, transcriptomic analyses can help to identify genes potentially related to thermal responses. We here investigated, via RNA-seq, whole-transcriptomic responses to increased and decreased temperatures in a thermophilous keystone sea urchin, <i>Arbacia ... -
Genotyping of Salmon Gill Poxvirus Reveals One Main Predominant Lineage in Europe, Featuring Fjord- and Fish Farm-Specific Sub-Lineages
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-29)Salmon gill poxvirus (SGPV) can cause serious gill disease in Atlantic salmon (<i>Salmo salar</i> L.) and represents a significant problem to aquaculture industries in Northern Europe. Here, a single-tube multi-locus variable-number tandem-repeat (VNTR) analysis (MLVA) genotyping assay, targeting eight VNTR loci, was developed for studying the epizootiology of SGPV. Through MLVA typing of SGPV ... -
Development of Commercial Aquaculture and the Role of Policies. A case study on the development of aquaculture as a tool for poverty reduction and food security in Kenya
(Master thesis; Mastergradsoppgave, 2015-08-17)In Kenya, there is a growing demand for fish food, due to rapid population growth and dwindling fisheries. Aquaculture has been revived, and is now the fastest growing food-producing sector in the country. However, this development has happened in an unprecedented speed whereas the issue with sustainability emerges. The main driver for this growth is by government intervention, heavily involved in ... -
Novel feeding interactions amplify the impact of species redistribution on an Arctic food web
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-01)Species are redistributing globally in response to climate warming, impacting ecosystem functions and services. In the Barents Sea, poleward expansion of boreal species and a decreased abundance of Arctic species are causing a rapid borealization of the Arctic communities. This borealization might have profound consequences on the Arctic food web by creating novel feeding interactions between ... -
GoDental! Enhancing flipped classroom experience with game‐based learning
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-10)<i>Aim</i> - To investigate the use of game‐based learning (GBL) to enhance students’ experience of the flipped classroom (FC) in dental education.<p> <p><i>Materials and Methods</i> - Students participated in three sessions organised as FC, implemented either as conventional FC or FC augmented with the GoDental! game. In the pre‐class phase, sessions 1 and 2 were organised as instructor‐made ... -
Microplastics in fish and shellfish - A threat to seafood safety?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-23)Plastic litter in the oceans is a major environmental problem, and small size plastics (microplastics) have been detected in many species of fish and shellfish consumed by humans. The purpose of this paper is to evaluate the knowledge on microplastics in fish and shellfish in relation to a possible threat to seafood safety. In fish and crustacean species, the presence of microplastics has in most ...