Blar i Published in cooperation with others på forfatter "Aglen, Asgeir"

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    • Fish investigations in the Barents Sea winter 2015 

      Mehl, Sigbjørn; Aglen, Asgeir; Dingsør, Gjert Endre; Gjøsæter, Harald; Godiksen, Jane; Staby, Arved; Wenneck, Thomas de Lange; Wienerroither, Rupert; Amelkin, Aleksey (IMR/PINRO Joint Report Series;2/2015, Research report, 2015-06)

    • 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 2017 

      Mehl, Sigbjørn; Aglen, Asgeir; Bogstad, Bjarte; Russkikh, Alexey A.; Staby, Arved; Wenneck, Thomas de Lange; Wienerroither, Rupert (IMR/PINRO Joint Report Series;, Research report, 2017)
      This report presents the main results from the surveys in January–March 2017. The surveys were performed with the Norwegian research vessels “Helmer Hanssen” and “G.O. Sars”. Annual survey reports since 1981 are listed in ...

    • Fish investigations in the Barents Sea winter 2018. 

      Mehl, Sigbjørn; Aglen, Asgeir; Gjøsæter, Harald; Godiksen, Jane Aanestad; Staby, Arved; Wenneck, Thomas de Lange; Wienerroither, Rupert; Russkikh, Alexey A.; Tretyakov, Ivan (IMR/PINRO Joint Report Series;, Research report, 2018)
      This report presents the main results from the surveys in January-March 2018. The surveys were performed with the Norwegian research vessels “Helmer Hanssen” and “Johan Hjort” and Russian research vessel “Fritjof Nansen”. ...

    • Fish Investigations in the Barents Sea Winter 2019 

      Mehl, Sigbjørn; Wenneck, Thomas de Lange; Aglen, Asgeir; Fuglebakk, Edvin; Gjøsæter, Harald; Godiksen, Jane Aanestad; Seim, Silje Elisabeth; Staby, Arved; Bogstad, Bjarte; Russkikh, Alexey A.; Fomin, Konstantin (IMR/PINRO Joint Report Series;, Research report, 2019)
      The Institute of Marine Research (IMR), Bergen, has performed acoustic measurements of demersal fish in the Barents Sea since 1976. Since 1981 a bottom trawl survey has been combined with the acoustic survey. Typical effort ...

    • In situ fish target strengths derived with a split-beam echo sounder 

      Nakken, Odd; Foote, Kenneth G.; Aglen, Asgeir (ICES CM documents, Working paper, 1985)
      In-situ target strengths of six fishes were determined with a split-beam echo sounder during cruises about Lofoten in March 1984 and the Shetland Islands in July 1984. The species and lengths, mean and standard deviation, ...

    • Including climate into the assessment of future fish recruitment, using multiple regression models. 

      Stiansen, Jan Erik; Aglen, Asgeir; Bogstad, Bjarte; Loeng, Harald; Mehl, Sigbjørn; Nakken, Odd; Ottersen, Geir; Svendsen, Einar (ICES CM documents, Working paper, 2005)
      Climate variability has generally not been included in the assessment of fish stocks in the Barents Sea and Norwegian Sea. However, in recent years there has been a focus on implementing climate variability in the assessment ...

    • Influence of climate on recruitment and migration of fish stocks in the North Sea 

      Svendsen, Einar; Aglen, Asgeir; Iversen, Svein A.; Skagen, Dankert W.; Smedstad, Odd M. (ICES CM Documents;1991/H:12, Working paper, 1991)
      For several decades one of the prime targets within fishery science has been to be able to understand and explain the great variability in the success of survival from egg to mature fish. One of the reasons why such effort ...

    • 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 2003 : detailed report 

      Aglen, Asgeir; Alvsvåg, John; Halland, Tor Ivar; Høines, Åge S.; Nakken, Odd; Russkikh, Alexey; Smirnov, Oleg (IMR/PINRO joint report series, Research report, 2003)
      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 ...

    • Investigations on demersal fish in the Barents Sea winter 2005 : detailed report 

      Aglen, Asgeir; Alvsvåg, John; Grekov, A.; Høines, Åge S.; Mehl, Sigbjørn; Zhukova, Nathalia (IMR/PINRO joint report series, Research report, 2005)
      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 ...

    • Joint PINRO/IMR report on the state of the Barents Sea ecosystem 2005/ 2006 

      Stiansen, Jan Erik; Aglen, Asgeir; Bogstad, Bjarte; Budgell, W. Paul; Dalpadado, Padmini; Dolgov, Andrey V.; Dommasnes, Are; Filin, Anatoly; Gjøsæter, Harald; Hauge, Kjellrun Hiis; Høines, Åge S.; Ingvaldsen, Randi; Johannesen, Edda; Jørgensen, Lis Lindal; Karsakov, A.L.; Klungsøyr, Jarle; Knutsen, Tor; Lien, Vidar S.; Loeng, Harald; Mehl, Sigbjørn; Buhl-Mortensen, Pål; Muchina, N.V.; Nesterova, V.N.; Olsen, Erik; Orlova, Emma L.; Ozhigin, Vladimir K.; Pedchenko, Andrey; Stenevik, Erling Kåre; Skogen, Morten D.; Titov, Oleg V.; Tjelmeland, Sigurd; Zabavnikov, V.B.; Ziryanov, S.V.; Zhukova, Nathalia; Øien, Nils; Aanes, Sondre (IMR/PINRO joint report series, Research report, 2006)

    • Length dependant corrections of survey estimates of cod and haddock in the Barents Sea 

      Nakken, Odd; Aglen, Asgeir (ICES CM documents, Working paper, 1994)
      This paper describes an attempt to utilize new information on gear selectivity and fish target strength to improve time series of survey estimates. Swept area estimates and acoustic estimates of cod and haddock in the ...

    • On the shape, size and density of North Sea herring schools as mapped by echo integration and accurate sonar projection 

      Misund, Ole Arve; Aglen, Asgeir (ICES CM Documents;1993/B:16, Working paper, 1993)
      The shape and horizontal extent of herring schools in the North Sea have been mapped by a naval sonar (SIMRAD SA 950) with narrow horizontal beam width. The density of schools that were passed over was measured by the ...

    • 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 ...

    • A regression model for recruitment of 3-year-old NEA cod based on capelin biomass, survey index and climate 

      Stiansen, Jan Erik; Aglen, Asgeir; Bogstad, Bjarte; Mehl, Sigbjørn; Nakken, Odd (Working paper, 2003)

    • Relationships between the geometric dimensions and biomass of schools 

      Misund, Ole Arve; Aglen, Asgeir; Beltestad, Arvid K.; Dalen, John (ICES CM Documents;1990/B:41, Working paper, 1990)
      Acoustic measurements of the geometric dimensions and packing density of herring, sprat and saithe schools have been conducted by multi-beam sonars and echo integrator systems. Relationships between the reflected echo ...