Browsing Published in cooperation with others by Author "Korsbrekke, Knut"

Now showing items 1-20 of 29

    • Acoustic and Bottom Trawl Surveys; How Much Information Do They Provide for Assessing the Northeast Arctic Cod Stock? 

      Korsbrekke, Knut; Mehl, Sigbjørn; Nakken, Odd; Pennington, Michael (ICES CM documents, Working paper, 1999)
      Acoustic and bottom trawl surveys of the Northeast Arctic cod stock provide fishery independent estimates of trends in abundance and population characteristics. Given the recent uncertainties in the catch based assessment ...

    • An approach to estimate the daily ration of cod during intensive feeding based on 24 hour fishery 

      Ajiad, Adnan Mosa; Korsbrekke, Knut (PINRO-IMR Symposium, Conference object, 1992)
      A model descnbing gashic evacuation developed by dos Santos (1990) using a modified version of the power exponential model for stomach evacuation is applied to the Northeast Arctic cod stomachs collected during 24 hour ...

    • Arctic fishes in the Barents Sea 2004-2015: Changes in abundance and distribution 

      Johannesen, Edda; Mørk, Herdis Langøy; Korsbrekke, Knut; Wienerroither, Rupert; Eriksen, Elena; Fossheim, Maria; Wenneck, Thomas de Lange; Dolgov, Andrey V.; Prokhorova, Tatiana; Prozorkevich, Dmitry (IMR/PINRO Joint Report Series;1- 2017, Research report, 2017)
      The Barents Sea is one of nine shelf ecosystem survey bordering the Arctic Basin. The Arctic region is warming faster than the rest of the world. In the Barents Sea the years since 2000 were the warmest since the onset of ...

    • Arctic fishes in the Barents Sea 2004-2015: Changes in abundance and distribution 

      Johannesen, Edda; Mørk, Herdis Langøy; Korsbrekke, Knut; Wienerroither, Rupert; Eriksen, Elena; Fossheim, Maria; Wenneck, Thomas de Lange; Dolgov, Andrey; Prokhorova, Tatiana; Prozorkevich, Dmitry (IMR/PINRO Joint Report Series;1/2017, Research report, 2017)

    • Can a bioenergetics model explain growth of the northeast Arctic cod? 

      Smedstad, Odd M.; Ajiad, Adnan Mosa; Korsbrekke, Knut (ICES CM Documents;1994/G:7, Working paper, 1994)
      For the period 1984 to 1991, the individual maximum daily consumption in calories (cmax) based on 33000 cod stomach samples is given by the power equation: Cmax = 68.84 · W ^0,934 where W represents the total fish ...

    • Comparison of the capture efficiency of 0-group fish in pelagic trawls 

      Hylen, Arvid; Korsbrekke, Knut; Nakken, Odd; Ona, Egil (PINRO-IMR Symposium, Conference object, 1995)
      In 1992 and 1993 experiments were carried out during the international 0-group fish surveys in order to study the capture efficiency of two pelagic trawls. The catches of the standard sampling trawl were compared with ...

    • Evaluation of the proposed harvest control rule for Northeast Arctic saithe: background, population model, parameters, data and preliminary analyses 

      Mehl, Sigbjørn; Fotland, Åge; Bogstad, Bjarte; Korsbrekke, Knut; Gjøsæter, Harald (Working paper, 2007)

    • Fish investigations in the Barents Sea winter 2007-2012 

      Mehl, Sigbjørn; Aglen, Asgeir; Bogstad, Bjarte; Dingsør, Gjert Endre; Gjøsæter, Harald; Johannesen, Edda; Korsbrekke, Knut; Staby, Arved; Wenneck, Thomas de Lange; Alexandrov, Dmitry I.; Murashko, Pavel A.; Prozorkevich, Dmitry; Smirnov, Oleg (IMR/PINRO Joint Report Series;1/2013, Research report, 2013)

    • Fish investigations in the Barents Sea winter 2013-2014 

      Mehl, Sigbjørn; Aglen, Asgeir; Bogstad, Bjarte; Dingsør, Gjert Endre; Gjøsæter, Harald; Godiksen, Jane; Johannesen, Edda; Korsbrekke, Knut; Staby, Arved; Wenneck, Thomas de Lange; Wienerroither, Rupert; Murashko, Pavel A.; Russkikh, Alexey (IMR/PINRO Joint Report Series;2/2014, Research report, 2014)

    • Fish investigations in the Barents Sea winter 2016 

      Mehl, Sigbjørn; Aglen, Asgeir; Bogstad, Bjarte; Dingsør, Gjert Endre; Korsbrekke, Knut; Olsen, Erik; Staby, Arved; Wenneck, Thomas de Lange; Wienerroither, Rupert; Amelkin, Aleksey; Russkikh, Aleksey (IMR/PINRO Joint Report Series;4/2016, Research report, 2016-09)

    • Fish investigations in the Barents Sea winter 2021 : IMR/PINRO Joint Report Series nr. 1 2022 

      Fall, Johanna Jennifer Elisabeth; Wenneck, Thomas de Lange; Bogstad, Bjarte; Fuglebakk, Edvin; Godiksen, Jane Aanestad; Korsbrekke, Knut; Seim, Silje Elisabeth; Skage, Malin Lie; Staby, Arved; Tranang, Caroline Aas; Windsland, Kristin; Russkikh, Alexey A.; Fomin, Konstantin (IMR/PINRO Joint Report Series;, Research report, 2022)
      This report presents the main results from the surveys in January-March 2021. The surveys were performed with the Norwegian research vessels “Helmer Hanssen”, “Kronprins Haakon” and “Johan Hjort”, and the Russian research ...

    • Fish investigations in the Barents Sea Winter 2022 

      Fall, Johanna Jennifer Elisabeth; Wenneck, Thomas de Lange; Bogstad, Bjarte; Fuglebakk, Edvin; Godiksen, Jane Aanestad; Høines, Åge Sigurd; Korsbrekke, Knut; Skage, Malin Lie; Staby, Arved; Tranang, Caroline Aas; Windsland, Kristin; Russkikh, Alexey A.; Kharlin, Sergey (IMR/PINRO Joint Report Series;2023 - 1, Research report, 2023)
      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 advice are based on survey results and international ...

    • Interactions between cod (Gadus morhua) and deep sea shrimp (Pandalus Borealis) in the Barents Sea 

      Korsbrekke, Knut; Mehl, Sigbjørn; Hylen, Arvid (ICES CM documents, Working paper, 1991)
      For some of the most important deep sea shrimp (Pandalus borealis) areas in the Barents Sea the content of shrimp in cod (Gadus morhua) stomachs during the first part of each year in the period 1984-1990 is analysed. Total ...

    • Investigations on demersal fish in the Barents Sea winter 2000 : detailed report 

      Aglen, Asgeir; Drevetnyak, Konstantin; Jakobsen, Tore; Korsbrekke, Knut; Lepesevich, Yuri; Mehl, Sigbjørn; Nakken, Odd; Nedreaas, Kjell Harald (IMR/PINRO joint report series, Research report, 2001)
      A combined acoustic and bottom trawl survey to obtain indices of abundance and estimates of length and weight at age has been carried out each winter (4-6 weeks in January-March) since 1981 in the Barents Sea. The target ...

    • Investigations on demersal fish in the Barents Sea winter 2001 : detailed report 

      Aglen, Asgeir; Alvsvåg, John; Lepesevich, Yuri; Korsbrekke, Knut; Mehl, Sigbjørn; Nedreaas, Kjell Harald; Sokolov, Konstantin; Ågotnes, Per (IMR/PINRO joint report series, Research report, 2002)
      A combined acoustic and bottom trawl survey to obtain indices of abundance and estimates of length and weight at age has been carried out each winter (46 weeks in January- March) since 1981 in the Barents Sea. The target ...

    • Investigations on demersal fish in the Barents Sea winter 2002 : detailed report 

      Aglen, Asgeir; Alvsvåg, John; Drevetnyak, Konstantin; Høines, Åge S.; Korsbrekke, Knut; Mehl, Sigbjørn; Sokolov, Konstantin (IMR/PINRO joint report series, Research report, 2002)
      A combined acoustic and bottom trawl survey to obtain indices of abundance and estimates of length and weight at age has been carried out each winter (4-6 weeks in January- March) since 1981 in the Barents Sea. The target ...

    • Investigations on demersal fish in the Barents Sea winter 2004 : detailed report 

      Aglen, Asgeir; Alvsvåg, John; Høines, Åge S.; Korsbrekke, Knut; Smirnov, Oleg; Zhukova, Nathalia (IMR/PINRO joint report series, Research report, 2004)
      The main results in 2004 were: - The abundance of the 2003 and 2001 year classes of cod are poor, the 2002 and 1999 year classes are below average, while the 2000 and 1998 year classes are near average. - The abundance of ...

    • Length and species dependent diurnal variation in catch rates in the Norwegian Barents Sea bottom trawl surveys 

      Korsbrekke, Knut; Nakken, Odd (ICES CM documents, Working paper, 1997)
      Diurnal variation in capture efficiency may add to the variability in swept area estimates (or indices) from bottom trawl surveys. In the present study the relationship between the day/night ratio of swept area estimates ...

    • Limiting inter-annual variation in total allowable catch strategies. An application to ICES roundfish stocks 

      Kell, Laurence T.; Pilling, Graham; Kirkwood, Geoffrey P.; Pastoors, Martin; Abaunza, Pablo; Aps, Robert; Biseau, Alain; Korsbrekke, Knut; Kunzlik, Philip; Laurec, Alain; Mesnil, Benoit; Needle, Coby L.; Roel, Beatriz; Ulrich, Clara (ICES CM Documents;2003/X:7, Working paper, 2003)
      This study evaluated through simulation management strategy that stabilise catch levels by setting bounds on the inter-annual variability in Total Allowable Catches (TACs). An integrated modelling approach was used, which ...

    • Minimalistic surveys clear the way for priorities in the ecosystem approach 

      Godø, Olav Rune; Hjellvik, Vidar; Tjøstheim, Dag; Korsbrekke, Knut (ICES CM documents;2009/I:20, Working paper, 2009)
      Standardized surveys are an integral part of most fish stock assessments. Ship time is expensive and new demands set by the ecosystem approach challenge present survey and sampling strategies with respect to coverage of ...