Browsing Artikler, rapporter og annet (Norges fiskerihøgskole) by Author "Aglen, Asgeir"

Now showing items 1-5 of 5

    • Coincident mass occurrence of gelatinous zooplankton in Northern Norway 

      Knutsen, Tor; Hosia, Aino; Falkenhaug, Tone; Skern-Mauritzen, Rasmus; Wiebe, Peter H.; Larsen, Roger B.; Aglen, Asgeir (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-05-23)
      In autumn 2015, several sources reported observations of large amounts of gelatinous material in a large north Norwegian fjord system, either caught when trawling for other organisms or fouling fishing gear. The responsible organism was identified as a physonect siphonophore, Nanomia cara, while a ctenophore, Beroe cucumis, and a hydromedusa, Modeeria rotunda, were also registered in high abundances ...

    • 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 ...

    • Estimation of acoustic indices with CVs for Northeast Arctic saithe in the Norwegian coastal survey 2003-2017 applying the Sea2Data StoX software 

      Mehl, Sigbjørn; Johnsen, Espen; Skålevik, Åsmund; Aglen, Asgeir (Research report; Forskningsrapport, 2018)
      The Sea2Data software StoX was applied to estimate acoustic indices with CVs and length and weight at age for Northeast Arctic saithe from the Norwegian coastal survey Varanger - Stad in 2013 to 2017. The indices are compared to indices previously estimated by the BEAM software, and differences are mainly explained by different strata areas.

    • Fish investigations in the Barents Sea winter 2017 

      Mehl, Sigbjørn; Aglen, Asgeir; Bogstad, Bjarte; Russkikh, Alexey A.; Staby, Arved; Wenneck, Thomas de Lange; Wienerroither, Rupert (Research report; Forskningsrapport, 2017)
      Annual catch quotas and other regulations of the Barents Sea fisheries are set through negotiations between Norway and Russia. Assessment of the state of the stocks and quota advices are given by the International Council for the Exploration of the Sea (ICES). Their work is based on survey results and international landings statistics. The results from the demersal fish winter surveys in the ...

    • Trapped in the TAC Machine: Making a Fisheries-Based Indicator System for Coastal Cod in Steigen, Norway 

      Holm, Petter; Aglen, Asgeir; Bjørkan, Maiken; Andersen, Jan (Chapter; Bokkapittel, 2020)
      The GAP project is concerned with the lack of stakeholder participation in providing knowledge for management. This creates a legitimacy problem as the fishermen do not get to share the knowledge basis for and justification of management decisions. In addition, fishermen’s experience-based knowledge remains unused. GAP intends to bridge the legitimacy and knowledge gaps, finding practical ways for ...