Now showing items 130-149 of 372

    • Feeding ecology of piscivorous brown trout (Salmo trutta L.) in a subarctic watercourse 

      Jensen, Hallvard; Bøhn, Thomas; Amundsen, Per-Arne; Aspholm, Paul Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2004-02)
      Feeding ecology of piscivorous brown trout was studied in the Pasvik watercourse, Norway and Russia. The watercourse is heavily regulated for hydroelectric purposes, and 5000 brown trout > 25 cm are stocked annually to compensate the negative impacts of the impoundments. Stocked and wild trout had almost identical diets consisting mainly of vendace Coregonus albula and partly of whitefish Coregonus ...
    • Field demonstration of a novel towed, area bubble-plume zooplankton (Calanus sp.) harvesting approach 

      Grimaldo, Eduardo; Leifer, Ira; Gjøsund, Svein Helge; Larsen, Roger B.; Jeuthe, Henrik (Research report; Forskningsrapport, 2010)
      This paper presents field experiment results of using a new technology to harvest copepods (Calanus sp.) in the ocean by bubble upwelling. Two largo-scale bubble rafts, a 21 m2 and a flexible 75 m2 bubble raft with tow parallel and perpendicular sparger elements, respectively, were field tested in areas with high, upper 25-m water column Calanus densities. Measured bubble-driven upwelling velocities ...
    • Field sampling marine plankton for biodiscovery 

      Ingebrigtsen, Richard Andre; Hansen, Espen; Andersen, Jeanette Hammer; Eilertsen, Hans Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-20)
      Microalgae and plankton can be a rich source of bioactivity. However, induction of secondary metabolite production in lab conditions can be difficult. One simple way of bypassing this issue is to collect biomass in the field and screen for bioactivity. Therefore, bulk net samples from three areas along the coast of northern Norway and Spitsbergen were collected, extracted and fractionated. ...
    • Fish silage hydrolysates: Not only a feed nutrient, but also a useful feed additive 

      Olsen, Ragnar Ludvig; Toppe, Jogeir (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-06-06)
      Background:<br> Processing of fish and shellfish may result in substantial amounts of by-products and unless they can be used as food, the most realistic option in most cases is the production of preserved feed nutrients. If large volumes are available, reduction to fishmeal and fish oil is the preferred technology. However, fresh by-products are most often available in insufficient quantities ...
    • Fisheries economics and management 

      Flaaten, Ola (Book; Bok, 2011-05)
    • Fisheries Management and Global Warming. Effects of climate change on fisheries in the Arctic region of the Nordic countries. 

      Eide, Arne; Ese, Ann-Christin; Hoel, Alf Håkon (Research report; Forskningsrapport, 2014)
    • Fisheries rent creation and distribution – the imaginary case of Codland 

      Flåten, Ola (Conference object; Konferansebidrag, 2009-08-27)
      This paper discusses actual and possible achievements and failures of Codland and examines it from the point of view of efficiency and in terms of distribution. It is argued in favour of the joint analysis of the two approaches when contemplating fisheries management reforms, since such reforms may create both winners and losers. The analysis demonstrates how rent drain from fishing communities and ...
    • 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. ...
    • Fishing efficiency of biodegradable PBSAT gillnets and conventional nylon gillnets used in Norwegian cod (Gadus morhua) and saithe (Pollachius virens) fisheries 

      Grimaldo, Eduardo; Herrmann, Bent; Vollstad, Jørgen; Su, Biao; Føre, Heidi Moe; Larsen, Roger B.; Tatone, Ivan (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-10)
      Fishing trials were carried out to compare the relative fishing efficiency of gillnets made of a new biodegradable resin (polybutylene succinate co-adipate-co-terephthalate, PBSAT) with conventional (nylon) nets. The fishing trials covered two consecutive fishing seasons (2016 and 2017) for cod (<i>Gadus morhua</i>) and saithe (<i>Pollachius virens</i>) in northern Norway. Results generally showed ...
    • Fiskeren fra veidemann til "advokat" 

      Johnsen, Jahn Petter (Chapter; Bokkapittel, 2002)
    • Fiskeridirektøren bør flyttes til Tromsø 

      Trondsen, Torbjørn; Arne, Luther; Finn, Nilsen; Alf Erling, Albrigten (Journal article; Tidsskriftartikkel, 2016-11-17)
      Fiskeridirektøren og det tilknyttede reguleringsutvalget og forvaltningsorganene flyttes fra Bergen til Tromsø, i det minste den delen som angår forvaltningen av ressursene utenfor Nord Norge, foreslår artikkelforfatterne.
    • Fiskeripolitikkens konsekvenser på kysten 

      Trondsen, Torbjørn (Chronicle; Kronikk, 2016-09-09)
    • Food-web structure varies along environmental gradients in a high-latitude marine ecosystem 

      Kortsch, Susanne; Primicerio, Raul; Aschan, Michaela; Lind, Sigrid; Dolgov, Andrey V.; Planque, Benjamin (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-05-17)
      Large-scale patterns in species diversity and community composition are associated with environmental gradients, but the implications of these patterns for food-web structure are still unclear. Here, we investigated how spatial patterns in food-web structure are associated with environmental gradients in the Barents Sea, a highly productive shelf sea of the Arctic Ocean. We compared food webs ...
    • Forfeiting the priority effect: turnover defines biofilm community succession 

      Brislawn, Colin J.; Graham, Emily B.; Dana, Karl; Ihardt, Peter; Fansler, Sarah J.; Chrisler, William B.; Cliff, John B.; Stegen, James C.; Moran, James J.; Bernstein, Hans C. (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-18)
      Microbial community succession is a fundamental process that affects underlying functions of almost all ecosystems; yet the roles and fates of the most abundant colonizers are often poorly understood. Does early abundance spur long term persistence? How do deterministic and stochastic processes influence the ecological contribution of colonizers? We performed a succession experiment within a hypersaline ...
    • Forvaltning, styring og kybernetisering i fiske – konsekvenser for raudåtenæringa? 

      Johnsen, Jahn Petter (Chapter; Bokkapittel, 2008)
      Norsk fiskerinæring har gjennomgått betydelige teknologiske og organisatoriske endringer. Blant annet har de tidligere frie fiskeriene blitt lukket, og en rekke styrings- og reguleringssystemer er innført. Fra å være basert på uformell organisering og implisitt styring, fikk vi gjennom 1980- og 90-åra ei fiskerinæring som var gjenstand for eksplisitt styring. Etter tusenårsskiftet ser vi konturene ...
    • Fra krise til krise - forventninger og svik i norsk fiskerinæring 

      Holm, Petter; Finstad, Bjørn-Petter; Henriksen, Edgar (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
    • Fra nasking til næring - samarbeid om lokal utvikling 

      Johnsen, Jahn Petter (Journal article; Tidsskriftartikkel, 2012)
      Naturreservatet i St. Abbs og Eyemouth er en ressurs for lokal næringsutvikling i Skottland. Grunnlaget er et lokalt samarbeid mellom fiskere, dykkere, verneinteresser og myndigheter. Kan vi i Nord-Norge lære noe av disse erfaringene?
    • A framework for results-based management in fisheries 

      Nielsen, Kåre Nolde; Aschan, Michaela; Agnarsson, Sveinn; Ballesteros, Marta; Baudron, Alan; Borges, Maria de Fatima; Campos, Aida; Chapela, Rosa; Daníelsdóttir, Anna Kristin; Erzini, Karim; Gregersen, Olavur; Holm, Petter; Lucchetti, Alessandro; Margeirsson, Sveinn; Mendes, Hugo Vilela; Olsen, Petter; Rangel, Mafalda; Sala, Antonello; Santiago, José Luis; Sigurdardottir, Sigridur; Silva, Cristina; Sykes, Daryl; Vidarsson, Jonas Runar; Virgili, Massimo; Wise, Laura; Fernandes, Paul George (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-30)
      We present a framework for results-based management (RBM) of commercial fisheries. The core idea of RBM is to reduce micromanagement by delegating management responsibility to resource users. The RBM framework represents an industrial organization approach to co-management and comprises three defining processes, conducted by three independent “agents”: (i) an “authority” defines specific and ...
    • From controversy to dialog in aquaculture 

      Karlsen, Kine Mari; Andreassen, Otto; Hersoug, Bjørn (Research report; Forskningsrapport, 2015-07)
      The Norwegian government has great ambitions for growth and development in the Norwegian aquaculture industry. At the same time, the aquaculture industry also encounters significant opposition by different stakeholders and is undoubtedly controversial. The aquaculture industry contributes to regional and social development in the Arctic, and supplies highly demanded seafood. On the other hand, the ...
    • From PhD to job market: Transforming doctoral training with the SAF21 model 

      Borit, Melania; Weber, Charlotte Teresa; Risan Johnsen, Hanne (Journal article; Tidsskriftartikkel, 2017-03)