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  • Policy context as a factor of bias in the valuation of environmental goods – a dual-process theories perspective 

    Nikitina, Ekaterina (Journal article; Tidsskriftartikkel; Preprint; Manuskript, 2018-03-13)
    When ecosystem services value estimates are applied in the economic assessment of environmental policies, high accuracy of these estimates is required. One of the directions in the scientific discussion on biases in stated preference (SP) valuation surveys builds on dual-process theories of judgment. The paper contributes to this literature by presenting an experiment where two types of judgment ...
  • Opportunity Cost of Environmental Conservation in the Presence of Externalities: Application to the Farmed and Wild Salmon Trade-Off in Norway 

    Nikitina, Ekaterina (Journal article; Tidsskriftartikkel; Preprint; Manuskript, 2018-08-17)
    Estimation of the opportunity cost is necessary for the economic assessment of environmental conservation policies. This paper considers the case where an environmental good is negatively affected in the process of the production of marketable goods. In the presence of externalities, conservation implies the undertaking of abatement measures by polluters. A relevant measure of opportunity cost in ...
  • The demands they are a-changin' 

    Brækkan, Eivind Hestvik; Thyholdt, Sverre Braathen; Asche, Frank; Myrland, Øystein (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-15)
    Smooth operators such as time trends are often applied to deal with unidentified demand shifters. However, if unknown factors affect demand irregularly, a time trend fails to capture the variation. We present an index approach for estimating irregular demand shifts, decomposing total demand shifts into predicted and unexplained effects. This allows separating demand shifts caused by known factors ...
  • Paralithocins, Antimicrobial Peptides with Unusual Disulfide Connectivity from the Red King Crab, Paralithodes camtschaticus 

    Moe, Morten Kaare; Haug, Tor; Sydnes, Magne Olav; Sperstad, Sigmund; Li, Chun; Vaagsfjord, Lena Christine; de la Vega, Enrique; Stensvåg, Klara (Journal article; Tidsskriftartikkel; Preprint; Manuskript, 2018-01-17)
    As part of an ongoing exploration of marine invertebrates as a source of new antimicrobial peptides, hemocyte extracts from the red king crab, <i>Paralithodes camtschaticus</i>, were studied. Three cationic cysteine (Cys)-rich peptides, named paralithocins 1–3, were isolated by bioassay-guided purification, and their amino acid sequences determined by Edman degradation and expressed sequences tag ...
  • Using Machine Learning to Uncover Latent Research Topics in Fishery Models 

    Syed, Shaheen; Weber, Charlotte Teresa (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-16)
    Modeling has become the most commonly used method in fisheries science, with numerous types of models and approaches available today. The large variety of models and the overwhelming amount of scientific literature published yearly can make it difficult to effectively access and use the output of fisheries modeling publications. In particular, the underlying topic of an article cannot always be ...
  • Could green artificial light reduce bycatch during Barents Sea Deep-water shrimp trawling? 

    Larsen, Roger B.; Herrmann, Bent; Sistiaga, Manu Berrondo; Brčić, Jure; Brinkhof, Jesse; Tatone, Ivan (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-31)
    The Nordmøre grid is widely used in shrimp trawls to reduce the bycatch of fish species. However, small-sized fish species and juveniles still pass through the grid and enter the codend, along with the targeted shrimp. This bycatch of small fish has a negative impact on the ecosystem due to increased fish mortality, and leads to additional sorting work onboard. Some small-sized fish that enter the ...
  • 3-Chloro-N′-(2-hydroxybenzylidene) benzohydrazide: An LSD1-Selective Inhibitor and Iron-Chelating Agent for Anticancer Therapy 

    Sarno, Federica; Papulino, Chiara; Franci, Gianluigi; Andersen, Jeanette hammer; Cautain, Bastien; Melardo, Colombina; Altucci, Lucia; Nebbioso, Angela; Andersen, Jeanette H. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-07)
    Despite the discovery and development of novel therapies, cancer is still a leading cause of death worldwide. In order to grow, tumor cells require large quantities of nutrients involved in metabolic processes, and an increase in iron levels is known to contribute to cancer proliferation. Iron plays an important role in the active site of a number of proteins involved in energy metabolism, DNA ...
  • The effect of Nordmøre grid length and angle on codend entry of bycatch fish species and shrimp catches 

    Larsen, Roger B.; Sistiaga, Manu Berrondo; Herrmann, Bent; Brinkhof, Jesse; Tatone, Ivan; Santos, Juan (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-18)
    The Nordmøre grid is regarded as an efficient bycatch reducing device and is used in various shrimp trawl fisheries globally. However, in some shrimp fisheries bycatch remains a problem that seriously impacts commercial trawl activities. This study tested and compared the performance of two versions of the Nordmøre grid in the Northeast Arctic Deepwater Shrimp (Pandalus borealis) fishery; a standard ...
  • Investigating fish behavioural responses to LED lights in trawls and potential applications for bycatch reduction in the Nephrops-directed fishery 

    Melli, Valentina; Krag, Ludvig Ahm; Herrmann, Bent; Karlsen, Junita Diana (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-18)
    Light-emitting diodes (LEDs) have been tested in trawl fisheries to reduce the bycatch of unwanted species through behavioural stimulation. Previous studies used LED lights to either highlight escaping routes or increase the contact rate with square-mesh panels. However, phototactic responses (moving towards or away from light sources) to LED lights could also be exploited to separate species during ...
  • CREELSELECT—A method for determining the optimal creel mesh: Case study on Norway lobster (Nephrops norvegicus) fishery in the Mediterranean Sea 

    Brčić, Jure; Herrmann, Bent; Mašanović, Marina; Šifner, Svjetlana Krstulović; Škeljo, Frane (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-31)
    In the laboratory, we investigated which sizes of <i>Nephrops</i> (<i>Nephrops norvegicus</i>) could pass through the meshes of different size and shape to establish a predictive model for the creels size selectivity. Predictions agreed well with the results from experimental fishing, demonstrating the reliability of this simple method. <i>Nephrops</i> minimum target size is 20 mm carapace length ...
  • The efficiency of sieve-panels for bycatch separation in Nephrops trawls 

    Santos, Juan; Herrmann, Bent; Mieske, Bernd; Krag, Ludvig Ahm; Haase, Stefanie; Stepputtis, Daniel (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-11)
    This study investigated the efficiency of a sieve‐panel concept, intended to separate bycatch species from <i>Nephrops</i> (Norway lobster) in a trawl gear via mechanical and behavioural means. Four different designs of varying panel mesh size or inclination were tested in experimental fishing. For each design, the length‐dependent sieving efficiency, defined as the fraction of <i>Nephrops</i> or ...
  • Size selection of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) in the Northeast Atlantic bottom trawl fishery with a newly developed double steel grid system 

    Larsen, Roger B.; Herrmann, Bent; Sistiaga, Manu Berrondo; Grimaldo, Eduardo; Tatone, Ivan; Brinkhof, Jesse (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-06)
    In recent years, Norwegian fishermen have reported problems with fish accumulation in front of the mandatory sorting grids (Sort-X, Sort-V, and Flexigrid). These problems are associated with high fish entry rates and low water flow through the grid sections. In this study, we replaced the lifting panel in the original design of a sorting grid section (Sort-V) by another steel grid (“lower grid”) in ...
  • Simulated trawling: Exhaustive swimming followed by extreme crowding as contributing reasons to variable fillet quality in trawl-caught Atlantic cod (Gadus morhua) 

    Svalheim, Ragnhild Aven; Aas-Hansen, Øyvind; Heia, Karsten; Drangsholt-Karlsson, Anders; Olsen, Stein Harris; Johnsen, Helge K. (Journal article; Tidsskriftartikkel; Preprint; Manuskript, 2018-07-19)
    Trawl-caught Atlantic cod (<i>Gadus morhua</i>) often yield high variable fillet quality potentially related to capture stress. To investigate mechanisms involved in causing variable quality, commercial-sized (size 3.5±0.9 kg) Atlantic cod were swum to exhaustion in a large swim tunnel and exposed to extreme crowding (736±50 kg m3) for 0, 1 or 3 hours in an experimental cod-end. Further, fish were ...
  • Social-ecological timelines to explore human adaptation to coastal change 

    Brattland, Camilla; Eythórsson, Einar; Weines, Jørn; Sunnanå, Knut (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-12-19)
    Through the construction of a socio-ecological timeline for the Porsanger fjord ecosystem, this article illustrates the different ways in which environmental and social–ecological changes have influenced the adaptations of rural households in coastal Sami communities in Finnmark, north Norway. The main finding is that, although environmental change in the form of seal invasions and dwindling ...
  • Catch and release patterns for target and bycatch species in the Northeast Atlantic deep-water shrimp fishery: Effect of using a sieve panel and a Nordmøre grid 

    Larsen, Roger B.; Herrmann, Bent; Sistiaga, Manu Berrondo; Brinkhof, Jesse; Santos, Juan (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-12-21)
    The Nordmøre grid and the sieve panel are two of the main devices used to reduce fish bycatch in trawl fisheries targeting shrimp species. However, even when using such devices, some small-sized fish enter the codend of the trawl together with the targeted shrimp. Therefore, bycatch reduction remains a problem in some shrimp fisheries. One such fishery is the Northeast Atlantic deep-water shrimp ...
  • Estimation of acoustic indices with CVs for cod and haddock in the Barents Sea winter survey 1994 – 2017 applying the Sea2Data StoX software 

    Mehl, Sigbjørn; Aglen, Asgeir; Johnsen, Espen; Skålevik, Åsmund (Research report; Forskningsrapport, 2018)
    <i>English</i>: The Sea2Data software StoX was applied to estimate acoustic indices with CVs for Northeast Arctic cod and haddock from the Barents Sea winter survey in 1994 to 2017. The indices are compared to indices previously estimated by the BEAM software. In most years the StoX indices for cod are quite similar to those obtained by BEAM, while they are somewhat higher for haddock. The largest ...
  • Torsk fra merd: Pre-rigor produksjon av loins med skinn 

    Kristoffersen, Silje; Kristiansen, Frank; Eilertsen, Guro; Olsen, Ragnar Ludvig (Research report; Forskningsrapport, 2009-03)
    I dette forsøket ble torsk fanget levende og lagret i merd hvor den ble fôret med hhv. lodde og kommersielt torskefôr i 3 måneder. Etter skånsom slakting og utblødning i 30 minutter, ble fisken sløyd og de biologiske data registrert før maskinell filetering enten pre-rigor (innen 2 timer etter død) og post-rigor (etter 4 dagers is-lagring av sløyd fisk). Det ble produsert ryggfileter (Loins) enten ...
  • Bakterievekst under naturtørking av tørrfisk: Sammenligning av normal- og mucosovev 

    Bjørkevoll, Ingebrigt; Landfald, Bjarne; Ernstsen, Marita Holm; Joensen, Sjurdur; Tidemann, Even (Research report; Forskningsrapport, 2008-04)
    Mikroorganismer antas å påvirke utviklingen av lukt og smak i tørrfisk, men det er lite er kjent om hvilke organismer som dominerer under tørkeprosessen. Samtidig er mikrobielle forhold er også antatt å være essensielle for utviklingen av mucoso, som er en kvalitetsfeil i tørrfisk der deler av fiskemuskelen blir oppløst og slimaktig. Slike partier må skjæres bort under bløtingsprosessen. Denne ...
  • Nye FoU-tilbud til sjømatindustri. Forslag til strategi for fiskeriforskningsmiljøet i Tromsø 

    Olsen, Ragnar Ludvig; Strøm, Terje; Sunnanå, Knut; Akse, Leif; Edvardsen, Torgeir (Research report; Forskningsrapport, 2000)
    Rapport fra en arbeidsgruppe nedsatt for å fremme forslag til ny strategi for fiskeriforskningsmiljøet i Tromsø for nye FoU-tilbud til sjømatindustrien. Gruppen fikk i oppgave å gi innspill til styrene i Norges Fiskerihøgskole og Fiskeri¬forsk¬ning om hvordan de to institusjonene i samarbeid kan styrke satsingen overfor norsk fiske- og sjømatindustri. Gruppens anbefalinger er at styrene i ...
  • The Fisheries Sector in Ghana: A Political Economy Analysis 

    Eriksen, Stein Sundstøl; Akpalu, Wisdom; Vondolia, Godwin Kofi (Research report; Forskningsrapport, 2018-12-04)
    The fishery sector of Ghana is beset with problems, including widespread illegal, unreported and unregulated fishing.This report analyses the political economy of fisheries in Ghana, focusing on the power and interests of key actors in the sector and the constraints and opportunities faced by the government in addressing the existing challenges. There are three main challenges facing the sector. ...

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