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norskArtikler, rapporter og annet (Norges fiskerihøgskole): Recent submissions
Now showing items 601-620 of 931
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Mechanistic model identifies increasing light availability due to sea ice reductions as cause for increasing macroalgae cover in the Arctic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-04)In the Arctic, rising seawater temperatures and increasing underwater light caused by reductions in sea ice cover are expected to change the structure of arctic marine communities. Substantial, sometimes sudden, increases in macroalgal productivity and biomass have already been observed in arctic rocky bottom communities. These macroalgal responses have been attributed to increasing temperature and ... -
Comparing size selectivity of traditional and knotless diamond-mesh codends in the Iceland redfish (Sebastes spp.) fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-04-30)The size selectivity and usability of two diamond mesh codends, a traditional two-panel codend versus an experimental four-panel ultra-cross knotless mesh codend, were compared using the covered codend method in the Iceland redfish (<i>Sebastes norvegicus and S. viviparous</i>) fishery. Results showed that there was no significant difference in size selectivity between the codends at lengths greater ... -
The transformation of the oceans and the future of marine social science
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-13)The oceans have become a juncture of great visions of blue growth as well as strong environmental concern. This paper discusses the essential role of the social sciences as the oceans increasingly emerge as a contested social arena. The marine social sciences have generated a vast knowledge about the development of fisheries and the implications of fisheries policies on coastal communities. We review ... -
A life after Research? First Release of Harp Seals (Phoca groenlandica) after Temporary Captivity for Scientific Purposes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-07-08)Three wild-caught female harp seals (Pagophilus groenlandicus) from the Greenland Sea stock were brought into temporary captivity in connection with a controlled validation study on energetics. The two pups and one adult were kept in two indoor and outdoor experimental facilities approved by the Norwegian Animal Research Authority. They were trained daily using operant conditioning to participate ... -
CpGs Induce Differentiation of Atlantic Salmon Mononuclear Phagocytes Into Cells With Dendritic Morphology and a Proinflammatory Transcriptional Profile but an Exhausted Allostimulatory Activity
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-13)Due to their ability to present foreign antigens and prime naïve T cells, macrophages, and dendritic cells (DCs) are referred to as professional antigen-presenting cells (APCs). Although activated macrophages may function as APCs, these cells are particularly effective at directly engaging pathogens through phagocytosis, and production of antimicrobial compounds. On the other hand, DCs possess superb ... -
Rethinking capitalist transformation of fisheries in South Africa and India
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018)The industrialization of fisheries and the growth of a capitalist sector within fisheries have received considerable scholarly attention. For the most part, scholars have emphasized how capitalism has led to privatization of the commons, forced small-scale resource users into wage labor, and marginalized the sector. This analysis does not, however, explain the continued presence of such a vibrant ... -
Antiviral Responses and Biological Concequences of Piscine orthoreovirus Infection in Salmonid Erythrocytes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-16)Salmonid red blood cells are the main target cells for <i>Piscine orthoreovirus</i> (PRV). Three genotypes of PRV (PRV-1,2,3) infect Atlantic salmon (<i>Salmo salar</i>), Chinook salmon (<i>Onchorhynchus tshawytscha</i>), Coho salmon (<i>Oncorhynchus kisutch</i>), rainbow trout (<i>Onchorhynchus mykiss</i>) and brown trout (<i>Salmo trutta</i>), and can cause diseases like heart and skeletal muscle ... -
How vulnerable is the European seafood production to climate warming?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-16)The main challenge for the European seafood industry is to ensure sustainable production volume while adapting to climate warming. Marine fisheries mainly target 41 species which account for 80% of the seafood production in Europe. The remaining 20% comes from marine and freshwater aquaculture, which harvest mainly 5 and 11 species, respectively. European seafood production volume (2004–2014) recorded ... -
Functional roles and redundancy of demersal Barents Sea fish: Ecological implications of environmental change
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-21)When facing environmental change and intensified anthropogenic impact on marine ecosystems, extensive knowledge of how these systems are functioning is required in order to manage them properly. However, in high-latitude ecosystems, where climate change is expected to have substantial ecological impact, the ecosystem functions of biological species have received little attention, partly due to the ... -
External damage to trawl-caught Northeast arctic cod (Gadus morhua): Effect of codend design
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-22)The purpose of this study was to investigate the extent of external damage (gear marks, pressure injuries, ecchymosis and skin abrasion) present on trawl-caught cod (Gadus morhua) and to examine whether the extent of damage could be reduced by introducing changes in the gear. We tested whether changing the 2-panel knotted codend used by the Norwegian trawler fleet operating in the Barents Sea today ... -
On the numerous concepts in invasion biology
(Journal article; Tidsskriftartikkel; Peer reviewed, 2006-01-20)The study of biological invasions has triggered the production of a diversity of concepts. The terminology has, however, often been applied inconsistently and inaccurately. This article lists and assesses the most commonly used terms and concepts in invasion ecology. In each case the most coherent definition and use is suggested. -
The antimicrobial effect of CEN1HC-Br against Propionibacterium acnes and its therapeutic and anti-inflammatory effects on acne vulgaris
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-12-03)Propionibacterium acnes is a commensal bacterium, which is involved in acne inflammation. An antimicrobial peptide named CEN1HC-Br, which was isolated and characterized form the green sea urchin, has been shown to possess broad-spectrum antibacterial activity. Little is known concerning the potential effects of its antibacterial and anti-inflammatory properties against P. acnes. To examine the potency ... -
Trading Off Tourism for Fisheries
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-22)This paper presents a deterministic bioeconomic model in which the creation of a marine protected area (MPA) is not only a fisheries management tool but also introduced in order to provide tourism amenity benefits. The theoretical model is illustrated with analysis of the Nha Trang Bay (NTB) MPA in Khanh Hoa province in Vietnam, where the anchovy purse seine fishery is considered. An amenity value ... -
Impact of Multiple Ecological Stressors on a Sub-Arctic Ecosystem: No Interaction Between Extreme Winter Warming Events, Nitrogen Addition and Grazing
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-30)Climate change is one of many ongoing human-induced environmental changes, but few studies consider interactive effects between multiple anthropogenic disturbances. In coastal sub-arctic heathland, we quantified the impact of a factorial design simulating extreme winter warming (WW) events (7 days at 6–7∘C) combined with episodic summer nitrogen (+N) depositions (5 kg N ha-1) on plant winter physiology, ... -
Environmental DNA: A New Low-Cost Monitoring Tool for Pathogens in Salmonid Aquaculture
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-12-07)Environmental DNA (eDNA) metabarcoding is a relatively new monitoring tool featuring in an increasing number of applications such as the facilitation of the accurate and cost effective detection of species in environmental samples. eDNA monitoring is likely to have a major impact on the ability of salmonid aquaculture industry producers and their regulators to detect the presence and abundance of ... -
Lactic acid bacteria in finfish - An update
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-10)A complex and dynamic community of microorganisms, play important roles within the fish gastrointestinal (GI) tract. Of the bacteria colonizing the GI tract, are lactic acid bacteria (LAB) generally considered as favorable microorganism due to their abilities to stimulating host GI development, digestive function, mucosal tolerance, stimulating immune response, and improved disease resistance. ... -
Transforming conflicts from the bottom-up? Reflections on civil society efforts to empower marginalized fishers in postwar Sri Lanka
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018)We analyze the efforts of an international consortium of academics and activists to understand and address a transnational fisheries conflict in South Asia. The so-called REINCORPFISH project (2010–2016) focused on an asymmetrical conflict between trawler fishers from the Indian state of Tamil Nadu who frequently transgress into Sri Lankan waters and northern Sri Lankan fishers, whose livelihoods ... -
Intestinal microbiome and its potential functions in bighead carp (Aristichthys nobilis) under different feeding strategies
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-12-03)Bighead carps (<i>Aristichthys nobilis</i>) were divided into four groups with different feeding strategies: group A, nature live food only (fertiliser only, 200 g urea + 160 g ethylamine phosphate + 250 g Huangjintai bio-fertiliser); group B, nature live food + 1/2 formulated feed; group C, nature live food + formulated feed; and group D, formulated feed only. The intestinal microbiomes of the ... -
Effect of a quality-improving codend on size selectivity and catch patterns of cod in bottom trawl fishery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-26)A new codend concept developed and tested exhibited significantly improved quality of caught cod (<i>Gadus morhua</i>) compared to that of the conventional codend used in the Barents Sea bottom trawl fishery. However, the design of the new quality-improving codend raised concerns about its size selectivity and the possibility that higher retention probability could negatively impact the catch pattern ... -
Data on European seafood biomass production by country, sectors, and species in 2004–2014 and on ecological characteristics of the main species produced
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-30)In this data article, we present the 2004–2014 average European seafood production volume by production sector, country, and species. The production data originates from the Food and Agriculture Organisation of the United Nations (FAO) and covers three production sectors: Marine fisheries, marine aquaculture, and freshwater production. We present the main ecological characteristics of each species ...
