Blar i ICES CM documents authored by IMR scientists (1949-2011) på forfatter "Michalsen, Kathrine"

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    • Ambient temperature and distribution of northeast arctic cod 

      Ottersen, Geir; Michalsen, Kathrine; Nakken, Odd (ICES CM documents, Working paper, 1996)
      Most studies on the effects of field temperature on fish distribution and population parameters have considered the temperature and its variability at fixed stations or sections rather than the temperature in the actual ...

    • Barents Sea Ecosystem Resilience under global environmental change 2010-2013 

      Planque, Benjamin; Johannesen, Edda; Michalsen, Kathrine; Primicerio, Raul; Fossheim, Maria; Ingvaldsen, Randi (ICES CM Documents;2010/Q:27, Working paper, 2010)

    • Behavioural rhythm of cod during migration in the Barents Sea 

      Stensholt, Boonchai K.; Michalsen, Kathrine; Godø, Olav Rune (ICES CM Documents;2000/K:34, Working paper, 2000)
      To assess fish abundance by direct methods and to understand and model species interaction, it is important to have proper knowledge about behavioural patterns. Patterns in vertical distribution might strongly affect ...

    • Catfish - King of the sea 

      Godø, Olav Rune; Huse, Irene; Michalsen, Kathrine (ICES CM Documents;1995/B:16, Working paper, 1995)
      During an acoustic tagging experiment on cod in the Barents Sea in March 1995 a hierarchy between different fish species was revealed, and the catfish (Anarhichas sp.) was observed to be dominant in relation to cod and ...

    • Estimates of towing time in surveys 

      Huse, Irene; Michalsen, Kathrine; Skeide, Roar L. (ICES CM documents, Working paper, 2002)
      To decide the start and stop time for a survey haul the current method used in Norwegian sampling are the data from the door sensors and height sensors of the trawl. When the trawl has achieved its right geometry, the start ...

    • An evaluation of recruitment indices for Northeast Arctic cod (Gadus morhua L.) 

      Helle, Kristin; Bogstad, Bjarte; Marshall, C. Tara; Michalsen, Kathrine; Ottersen, Geir; Pennington, Michael (ICES CM documents, Working paper, 1999)
      Indices of the abundance of Northeast Arctic cod (Gadus morhua L.) for various life stages were compared in order to determine the earliest stage at .which year-class strength is established. The indices considered are: ...

    • Growth of northeast arctic cod in relation to ambient temperature 

      Michalsen, Kathrine; Ottersen, Geir; Nakken, Odd (ICES CM documents, Working paper, 1996)
      In the present study temperature related changes in horizontal distribution are described and the influence of temperature on the growth of Northeast Arctic cod is interpreted. Data from acoustic-and bottom trawl surveys ...

    • Linking tagging technology and molecular genetics to gain insight in the spatial dynamics of two stocks of cod in Northeast Atlantic waters 

      Michalsen, Kathrine; Johansen, Torild; Johannesen, Edda (ICES CM documents, Working paper, 2006)
      The Northeast Arctic cod (Gadus morhua L.: NEAC) is thought to be the most abundant cod stock in the North Atlantic, while the catches of the partially co-occurring Norwegian coastal cod (NCC) stocks have dramatically ...

    • Observations of cod behaviour reveal insights into the function and properties of the swimbladder under pressure 

      Kooij, Jeroen van der; Righton, David; Michalsen, Kathrine; Thorsteinsson, Vilhjalmur; Svedäng, Henrik; Neat, Francis (ICES CM documents, Working paper, 2006)
      Atlantic cod (Gadus morhua L.) is a highly adaptive boreal species with a broad distribution through different ecosystems in the North Atlantic. Diet, environmental factors and population dynamics vary enormously ...

    • 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 ...

    • The use of data storage tags to study cod natural behaviour and availability to abundance surveys in the Barents Sea 

      Godø, Olav Rune; Michalsen, Kathrine (ICES CM Documents;1997/W:18, Working paper, 1997)
      Vertical movements of fish stocks can be studied by means of acoustic data from surveys, and diurnal related cycles in behaviour is often reported. To what extent the movements observed by this method reflect behaviour ...

    • Vertical distribution of cod, haddock and redfish; Impact on bottom trawl and acoustic surveys in the Barents Sea 

      Aglen, Asgeir; Engås, Arill; Huse, Ingvar; Michalsen, Kathrine; Stensholt, Boonchai K. (ICES CM Documents;1997/Y:16, Working paper, 1997)
      At a selected location in the Barents Sea acoustic observations, bottom- and pelagic trawl catch data were collected over a 10 day period. A large proportion of the fish were in the acoustic dead zone during the sampling ...