Blar i Publikasjoner fra CRIStin på forfatter "Johnsen, Espen"

Viser treff 21-30 av 30

    • Measuring distribution and density of sprat in Årdalsfjorden with a kayak drone - 15-16 August 2020 

      Johnsen, Espen; Totland, Atle; Kvamme, Cecilie (Rapport fra havforskningen;2020 - 28, Research report, 2020)
      Sprat is a key species in several Norwegian fjords, as an important prey for fish, sea mammals and sea birds. The sprat populations are monitored with routine acoustic-trawl surveys using a large research vessel, which ...

    • Panel-based Assessment of Ecosystem Condition of the North Sea Shelf Ecosystem 

      Arneberg, Per; Husson, Berengere; Siwertsson, Anna; Albretsen, Jon; Børsheim, Knut Yngve; Denechaud, Côme; Durant, Joël; Falkenhaug, Tone; Fauchald, Per; Opdal, Anders Martin Frugård; Jentoft, Sissel; Johannessen, Tore; Johnsen, Espen; Jones, Elizabeth Marie; Kvamme, Cecilie; Ljungström, Anna Jeja Gabriella; Buhl-Mortensen, Pål; Reecht, Yves; Solvang, Hiroko Kato; Skogen, Morten D.; Slotte, Aril; Strand, Espen; Søvik, Guldborg; van der Meeren, Gro Ingleid (Rapport fra havforskningen;2023 - 17, Research report, 2023)
      The System for Assessment of Ecological Condition, coordinated by the Norwegian Environment Agency, is intended to form the foundation for evidence-based assessments of the ecological condition of Norwegian terrestrial and ...

    • Panel-based Assessment of Ecosystem Condition of the North Sea Shelf Ecosystem - Appendices 

      Arneberg, Per; Husson, Berengere; Siwertsson, Anna; Albretsen, Jon; Børsheim, Knut Yngve; Denechaud, Côme; Durant, Joël; Falkenhaug, Tone; Fauchald, Per; Opdal, Anders Martin Frugård; Jentoft, Sissel; Johannessen, Tore; Johnsen, Espen; Jones, Elizabeth Marie; Kvamme, Cecilie; Ljungström, Anna Jeja Gabriella; Buhl-Mortensen, Pål; Reecht, Yves; Solvang, Hiroko Kato; Skogen, Morten D.; Slotte, Aril; Strand, Espen; Søvik, Guldborg; van der Meeren, Gro Ingleid (Rapport fra havforskningen;2023 - 18, Research report, 2023)

    • Råd for tobisfiskeriet i norsk sone for 2022 - Tobistokt i Nordsjøen 27. april-12. mai 2022 

      Johnsen, Espen (Toktrapport;2022 - 6, Research report, 2022)
      Tobistoktet i 2022 viser at rekrutteringen (ettåringer) av havsil (tobis) i sørlige del av norsk sone av Nordsjøen er lavere enn middels, men individvekten for disse ettåringene er høyere enn gjennomsnittet i tidsserien ...

    • 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 ...

    • StoX: An open source software for marine survey analyses 

      Johnsen, Espen; Totland, Atle; Skålevik, Åsmund; Holmin, Arne Johannes; Dingsør, Gjert Endre; Fuglebakk, Edvin; Handegard, Nils Olav (Journal article; Peer reviewed, 2019)
      Scientists across the globe conduct survey programs to monitor and characterize abundance, population structure, biodiversity and geographical distributions. To assess the state of marine fish and zooplankton, population ...

    • Survey report for CRIMAC SFI 2023 

      Handegard, Nils Olav; Allken, Vaneeda; Holmin, Arne Johannes; Johnsen, Espen; Korneliussen, Rolf; Pedersen, Geir; Skjefstad, Joakim; Rogge, Rabea Patricia; Samuelsen, Mikal Arntzen; Tenningen, Maria; Sivle, Lise Doksæter (Toktrapport;2024 - 7, Research report, 2024)
      This cruise report describes the objectives, methods, and preliminary results from the tasks carried out at the CRIMAC SFI survey. The survey was conducted on board RV G.O. Sars between November 15th (Tromsø) and November ...

    • Toktrapport fra økosystemtokt i Vestlandsfjordene — Hydrografi, vannkjemi, reker, krill, bunnfisk, tobis og perifylla 

      Søvik, Guldborg; Falkenhaug, Tone; Zimmermann, Fabian; Gallo, Natalya; Nedreaas, Kjell Harald; Danre, Jean-Baptiste; Hovland, Terje; Thangstad, Trude Hauge; Olsen, Siri Aaserud; Johnsen, Espen; Asplin, Lars (Toktrapport;2023 - 11, Research report, 2023)
      Den Strategiske instituttsatsingen CoastRisk (2019–2023) har hatt som mål å styrke kunnskapsgrunnlaget om ulike påvirkningsfaktorers betydning for kystøkosystemenes tilstand, funksjon og utvikling. Vestland fylke er ett ...

    • Underwater noise from wind at the high north LoVe ocean observatory 

      Ødegaard, Lars Alf; Pedersen, Geir; Johnsen, Espen (Peer reviewed; Journal article, 2019)

    • Video Image Enhancement and Machine Learning Pipeline for Underwater Animal Detection and Classification at Cabled Observatories 

      Lopez-vazquez, Vanesa; Lopez-guede, Jose Manuel; Marini, Simone; Fanelli, Emanuela; Johnsen, Espen; Aguzzi, J. (Peer reviewed; Journal article, 2020)
      An understanding of marine ecosystems and their biodiversity is relevant to sustainable use of the goods and services they offer. Since marine areas host complex ecosystems, it is important to develop spatially widespread ...