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Browsing Brage IMR by Author "Svellingen, Ingvald"

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    • Etterlatte oljeplattformer som kunstige fiskerev 

      Soldal, Aud Vold; Humborstad, Odd-Børre; Løkkeborg, Svein; Svellingen, Ingvald; Jørgensen, Terje (Fisken og havet, Research report, 1999)
      Prosjektet som beskrives i rapporten har til hensikt å belyse i hvilken utstrekning etterlatte plattformer i Nordsjøen samler fisk, og om de kan utnyttes til lønnsomt fiske. Hoveddelen ble utført ved Albuskjell 2/4 Fox ...
    • Forsøk med lys i fisketeiner. Rapport fra to feltforsøk 

      Furevik, Dag M.; Løkkeborg, Svein; Saltskår, Jostein; Aasen, Asbjørn; Svellingen, Ingvald; Jørgensen, Terje (Rapport fra Havforskningen;Nr.8-2008, Working paper, 2008-07)
      Våren 2007 ble det gjennom et møte mellom firmaet Esca AS ved Vidar Saue, Christian Michelsen Research (CMR) ved Dag Lothe og flere deltakere fra faggruppe Fangst vedHavforskningsinstituttet diskutert en utprøving av ...
    • High-resolution target strength measurements in deep water 

      Ona, Egil; Svellingen, Ingvald (Others, 1999)
    • Hydroacoustic performance of fishery survey instruments 

      Knudsen, Hans Petter; Ona, Egil; Svellingen, Ingvald (Others, 2001)
    • Methodology for assessment of the capelin spawning migration in the Barents Sea, spring 2008 

      Eriksen, Elena; Johansen, Geir Odd; Pedersen, Geir; Peña, Hector; Svellingen, Ingvald; Tjelmeland, Sigurd ([Toktrapport/Havforskningsinstituttet];Nr. 8 - 2008, Working paper, 2008)
    • Oil production structures in the North Sea as fish aggregating devices 

      Brønstad, Oddvar; Humborstad, Odd-Børre; Jørgensen, Terje; Løkkeborg, Svein; Svellingen, Ingvald; Soldal, Aud Vold (ICES CM documents, Working paper, 1998)
      The paper deals with a study aimed at investigating whether underwater structures from decommissioned oil platforms in the North Sea can be used as artificial fish reefs or protection habitats for fish. The experimental ...
    • Quantifying the amount of fish unavailable to a bottom trawl by use of an upward looking transducer 

      Michalsen, Kathrine; Aglen, Asgeir; Somerton, David; Svellingen, Ingvald; Øvredal, Jan Tore (ICES CM documents, Working paper, 1999)
      When surveying demersal fish with a wide and variable vertical distribution, it is desirable to combine information from a bottom trawl survey with the information from a hydroacoustic survey into an absolute abundance ...
    • Simple calibration of a split-beam echo-sounder 

      Svellingen, Ingvald; MacLennan, David N. (ICES CM Documents;1986/B:8, Working paper, 1986)
    • Simple calibration technique for the split-beam echo-sounder 

      MacLennan, David N.; Svellingen, Ingvald (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1989)
      The split-beam echo-sounder is used to measure the target strength of fish. Calibration of this instrument requires sensitivity measurements to be made throughout the cross-section of the acoustic beam. It is necessary ...
    • Some pitfalls of short-range standard-target calibration 

      Ona, Egil; Foote, Kenneth G.; Zhao, Xianyong; Svellingen, Ingvald (ICES CM Documents;1996/B:36, Working paper, 1996)
      Often it is necessary or desirable to perform a standard-target calibration at rather short range, for example, because of shallow water or interest in measuring animals at short range. A number of general range-dependent ...
    • A summary of target strength observations on fisheries from the shelf off West Africa 

      Svellingen, Ingvald; Ona, Egil (Others, 1999)
    • Target strength analysis in high fish densities using a probing split beam transducer 

      Ona, Egil; Svellingen, Ingvald (Others, 2001)
    • Vassild: Metodeutvikling for bestandsestimering [2/4 - 15/4, 2008] 

      Hallfredsson, Elvar; Svellingen, Ingvald; Hansen, Hege Ø. ([Toktrapport/Havforskningsinstituttet];Nr. 6 - 2008, Working paper, 2008)

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