Blar i Publikasjoner fra CRIStin på forfatter "Johansen, Geir Odd"

Viser treff 1-8 av 8

    • Climate change and new potential spawning sites for Northeast Arctic cod 

      Sandø, Anne Britt; Johansen, Geir Odd; Aglen, Asgeir; Stiansen, Jan Erik; Renner, Angelika (Peer reviewed; Journal article, 2020)
      In this study we investigate both historical and potential future changes in the spatial distribution of spawning habitats for Northeast Arctic cod (NEA cod) based on a literature study on spawning habitats and different ...

    • Diel vertical movements determine spatial interactions between cod, pelagic fish and krill on an Arctic shelf bank 

      Skaret, Georg; Johansen, Geir Odd; Johnsen, Espen; Fall, Johanna Jennifer Elisabeth; Fiksen, Øyvind; Englund, Gøran; Fauchald, Per; Gjøsæter, Harald; Macaulay, Gavin; Johannesen, Edda (Peer reviewed; Journal article, 2020)
      Predator-prey spatial interactions are essential to understand ecosystem processes like predation rates and trophic interaction strength. In marine systems, such spatial interactions are highly dynamic and difficult to ...

    • IESSNS international mackerel-ecosystem survey (2014813) 01.07.2014-28.07.2014 

      Johansen, Geir Odd; Grimsbø, Endre (Research report, 2014)
      Ecosystem cruise with abundance estimation and biological sampling of Northeast Atlantic (NEA) mackerel and Norwegian spring-spawning (NSS) herring. Predetermined station net for systematic biological sampling with the ...

    • Predator–prey overlap in three dimensions: cod benefit from capelin coming near the seafloor 

      Fall, Johanna Jennifer Elisabeth; Johannesen, Edda; Englund, Göran; Johansen, Geir Odd; Fiksen, Øyvind (Peer reviewed; Journal article, 2021)
      Spatial overlap between predator and prey is a prerequisite for predation, but the degree of overlap is not necessarily proportional to prey consumption. This is because many of the behavioural processes that precede ...

    • Samlet påvirkning i foreslåtte særlig verdifulle og sårbare områder i norske havområder 

      Hansen, Cecilie; Aarflot, Johanna Myrseth; Eriksen, Elena; Husson, Berengere; Fauchald, Per; Johansen, Geir Odd; Jørgensen, Lis Lindal; van der Meeren, Gro Ingleid; Mikkelsen, Nina; Ottersen, Geir; von Quillfeldt, Cecilie; Skern-Mauritzen, Mette (Rapport fra havforskningen;2022 - 46, Research report, 2022)
      I dette arbeidet er det gjort en vurdering av risiko fra samlet påvirkning med tilhørende usikkerhet for aktive sektorer i norske havområder, for hvert av havområdene Nordsjøen, Norskehavet og Barentshavet, og for hvert ...

    • StoX applied to cod and haddock data from the Barents Sea NOR-RUS ecosystem cruise in autumn - Swept area abundance, length and weight at age 2004-2017 

      Johannesen, Edda; Johnsen, Espen; Johansen, Geir Odd; Korsbrekke, Knut (Fisken og Havete;2019 - 6, Research report, 2019)
      North East Arctic cod and haddock are the largest stocks of these species in the world. Data from the Barents Sea NOR-RUS ecosystem cruise (BESS) in autumn is used as input to the assessment of these species. Here, we used ...

    • Survey report from the joint Norwegian/Russian Ecosystem Survey in the Barents Sea and adjacent waters, August - October 2017 

      Prozorkevich, Dmitry A.; Johansen, Geir Odd; van der Meeren, Gro Ingleid (IMR/PINRO Joint Report Series;2018 - 2, Research report, 2018)
      The aim of the joint Norwegian/Russian ecosystem survey in the Barents Sea and adjacent waters, August-October (BESS) is to monitor the status of abiotic and biotic factors and changes of these in the Barents Sea ecosystem. ...

    • Survey report from the joint Norwegian/Russian Ecosystem Survey in the Barents Sea and the adjacent waters August- December 2022 

      Johansen, Geir Odd; Trofimov, Alexander; Ingvaldsen, Randi Brunvær; Prokhorova, Tatiana; Grøsvik, Bjørn Einar; Krivosheya, Pavel; Bagøien, Espen; Lerch, Sarah Joanne; Prokopchuk, Irina; Eriksen, Elena; Husson, Berengere; Skaret, Georg; Johannesen, Edda; Bogstad, Bjarte; Windsland, Kristin; Höffle, Hannes; Wienerroither, Rupert; Hvingel, Carsten; Dolgov, Andrey; Hjelset, Ann Merete; Bakanev, Sergey; Stesko, Aleksei; Jørgensen, Lis Lindal; Øien, Nils Inge; Boehm, Frederike; Strelkova, Natalia; Blinova, Daria; Klepikovskiy, Roman; Fauchald, Per (IMR/PINRO Joint Report Series, Research report, 2023)
      The aim of the joint Norwegian/Russian ecosystem survey in the Barents Sea and adjacent waters, August-October (BESS) is to monitor the status and changes in the Barents Sea ecosystem and provide data to support stock ...