Browsing Publikasjoner fra CRIStin by Author "Johannesen, Edda"

Now showing items 21-36 of 36

    • Increased functional diversity warns of ecological transition in the Arctic 

      Frainer, André; Primicerio, Raul; Dolgov, Andrey V.; Fossheim, Maria; Johannesen, Edda; Lind, Sigrid; Aschan, Michaela (Peer reviewed; Journal article, 2021)
      As temperatures rise, motile species start to redistribute to more suitable areas, potentially affecting the persistence of several resident species and altering biodiversity and ecosystem functions. In the Barents Sea, a ...

    • Large-scale patterns in community structure of benthos and fish in the Barents Sea 

      Johannesen, Edda; Jørgensen, Lis Lindal; Fossheim, Maria; Primicerio, Raul; Greenacre, Michael; Ljubin, Pavel A.; Dolgov, Andrey V.; Ingvaldsen, Randi; Anisimova, Natalya A.; Manushin, Igor E. (Journal article; Peer reviewed, 2016-04-23)
      Biogeographical patterns have an ecological basis, but few empirical studies possess the necessary scale and resolution relevant for investigation. The Barents Sea shelf provides an ideal study area, as it is a transition ...

    • Marine fishes expert network: Findings and recommendations from the circumpolar biodiversity monitoring program´s state of the Arctic marine biodiversity report 

      Hedges, Kevin; MacPhee, Shannon; Valtýsson, Hreiðar Þór; Johannesen, Edda; Mecklenburg, Catherine W. (Lecture, 2018)

    • Marine fishes of the arctic region 

      Mecklenburg, Catherine W.; Lynghammar, Arve; Johannesen, Edda; Byrkjedal, Ingvar; Christiansen, Jørgen Schou; Dolgov, Andrey V.; Karamushko, Oleg V.; Mecklenburg, Tony; Møller, Peter Rask; Steinkte, Dirk; Wienerroither, Rupert (Lecture, 2018)

    • Persistent differences in recruitment variability among co-occurring North Atlantic groundfish species 

      Johannesen, Edda; Keith, Dave; Fogarty, Michael; Shackell, Nancy; Frank, Kenneth T. (Peer reviewed; Journal article, 2022)
      Knowledge of recruitment and its variability in marine fish populations contributes to sustainable fisheries but a full understanding remains elusive. An earlier study showed that haddock (Melanogrammus aeglefinus) stocks ...

    • 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 ...

    • Report of the Joint Russian-Norwegian Working Group on Arctic Fisheries (JRN-AFWG) 2022 

      Howell, Daniel; Bogstad, Bjarte; Chetyrkin, Anatoly; Fall, Johanna Jennifer Elisabeth; Filin, Anatoly; Godiksen, Jane Aanestad; Höffle, Hannes; Johannesen, Edda; Kovalev, Yuri; Russkikh, Alexey; Vasilyev, Dmitri; Yaragina, Natalya (IMR/PINRO Joint Report Series;2022 - 6, Research report, 2022)
      On 30 th March 2022 all Russian participation in ICES was temporally suspended. Although the announcement of the suspension stressed the role of ICES as a “multilateral science organization”, this suspension applied not ...

    • Report of the Joint Russian-Norwegian Working Group on Arctic Fisheries (JRN-AFWG) 2023 

      Howell, Daniel; Bogstad, Bjarte; Chetyrkin, Anatoly; Fall, Johanna Jennifer Elisabeth; Filin, Anatoly; Hallfredsson, Elvar Halldor; Höffle, Hannes; Johannesen, Edda; Kovalev, Yuri; Mikhailov, Andrey; Russkikh, Alexey; Stesko, Aleksi; Vasilyev, Dmitri; Vihtakari, Mikko; Windsland, Kristin; Yaragina, Natalya (IMR/PINRO Joint Report Series;2023 - 7, Research report, 2023)
      On 30 th March 2022 all Russian participation in ICES was temporally suspended. Although the announcement of the suspension stressed the role of ICES as a “multilateral science organization”, this suspension applied not ...

    • Resource‐driven colonization by cod in a high Arctic food web 

      Johannesen, Edda; Yoccoz, Nigel; Tveraa, Torkild; Schackell, Nancy L.; Ellingsen, Kari; Dolgov, Andrey V.; Frank, Kenneth T. (Peer reviewed; Journal article, 2020)
      1. Climate change is commonly associated with many species redistributions and the influence of other factors may be marginalized, especially in the rapidly warming Arctic. 2. The Barents Sea, a high latitude large marine ...

    • The rise of a marine generalist predator and the fall of beta diversity 

      Ellingsen, Kari; Yoccoz, Nigel; Tveraa, Torkild; Frank, Kenneth T.; Johannesen, Edda; Anderson, Marti J.; Dolgov, Andrey V.; Shackell, Nancy L. (Peer reviewed; Journal article, 2020)
      Determining the importance of physical and biological drivers in shaping biodiversity in diverse ecosystems remains a global challenge. Advancements have been made towards this end in large marine ecosystems with several ...

    • Seasonal dynamics of spatial distributions and overlap between Northeast Arctic cod (Gadus morhua) and capelin (Mallotus villosus) in the Barents Sea 

      Fall, Johanna Jennifer Elisabeth; Ciannelli, Lorenzo; Skaret, Georg; Johannesen, Edda (Journal article; Peer reviewed, 2018)
      The trophic link between cod (Gadus sp.) and capelin (Mallotus sp.) is important in many panarctic ecosystems. Since the early 2000s, the Northeast Arctic cod stock (G. morhua) in the Barents Sea has increased greatly, and ...

    • 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 CODFUN 2016114 Barents Sea survey 5.-11. oktober 2016 

      Skaret, Georg; Johannesen, Edda; Fall, Johanna Jennifer Elisabeth; Fiksen, Øyvind (Rapport fra havforskningen;Nr. 41 - 2016, Research report, 2016)
      The survey is part of the project “The cod – capelin interaction in the Barents Sea: spatial dynamics in predator prey overlap and functional response (CODFUN)” funded by the Norwegian Research Council (NRC project number ...

    • 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 ...

    • The role of cod in the decline in arctic fishes in the Barents sea 

      Johannesen, Edda; Dolgov, Andrey V.; Ottersen, Geir (Lecture, 2018)

    • Tracking oocyte development and the timing of skipped spawning for north-east Arctic haddock (Melanogrammus aeglefinus) 

      Tronbøl, Frida; Johannesen, Edda; Alix, Maud; dos Santos Schmidt, Thassya Christina; Charitonidou, Katerina; Folkvord, Arild; Kjesbu, Olav Sigurd (Peer reviewed; Journal article, 2022)
      The present study tracked oocyte development over 9 months and noted incidences of ‘skipping’, i.e., adults terminating their upcoming reproductive cycle, in field-caught north-east Arctic (NEA) haddock (Melanogrammus ...