Browsing Brage IMR by Author "Johannesen, Edda"

Now showing items 21-40 of 67

    • Demersal fish assemblages in the boreo-Arctic shelf waters around Svalbard during the warm period 2007–2014 

      Bergstad, Odd Aksel; Johannesen, Edda; Høines, Åge Sigurd; Ellingsen, Kari Elsa; Lien, Vidar Surén; Byrkjedal, Ingvar; Yoccoz, Nigel Gilles; Tveraa, Torkild; Wienerroither, Rupert; Langhelle, Gunnar; Wenneck, Thomas de Lange (Peer reviewed; Journal article, 2017)
      The temporal and spatial resilience of abundance patterns of assemblages of organisms inhabiting transition zones between Arctic and boreal regions is an issue of concern in relation to climate change. The recognition that ...

    • 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 ...

    • Diet and trophic structure of fishes in the Barents Sea: the Norwegian-Russian program “Year of stomachs” 2015 - establishing a baseline 

      Eriksen, Elena; Benzik, Aleksander N.; Dolgov, Andrey V.; Skjoldal, Hein Rune; Vihtakari, Mikko Juhani; Johannesen, Edda; Prokhorova, Tatiana; Keulder-Stenevik, Felicia Juanita; Prokopchuk, Irina; Strand, Espen (Peer reviewed; Journal article, 2020)
      There is a long history of investigations of fish diet in the Barents Sea. The focus has been on commercially important fish species and their food consumption, while diet and interactions of other fishes have been studied ...

    • Diets of the Barents Sea cod (Gadus morhua) from the 1930s to 2018 

      Townhill, Bryony; Holt, Rebecca Emma; Bogstad, Bjarte; Durant, Joël; Pinnegar, John K.; Dolgov, Andrey V.; Yaragina, Natalia A.; Johannesen, Edda; Ottersen, Geir (Peer reviewed; Journal article, 2021)
      A new dataset on the diet of Atlantic cod in the Barents Sea from the 1930s to the present day has been compiled to produce one of the largest fish diet datasets available globally. Atlantic cod is one of the most ecologically ...

    • Diets of the Barents Sea cod (Gadus morhua) from the 1930s to 2018 

      Townhill, Bryony; Holt, Rebecca Emma; Bogstad, Bjarte; Durant, Jo l M.; Pinnegar, John K.; Dolgov, Andrey V.; Yaragina, Natalia A.; Johannesen, Edda; Ottersen, Geir (Peer reviewed; Journal article, 2021)
      A new dataset on the diet of Atlantic cod in the Barents Sea from the 1930s to the present day has been compiled to produce one of the largest fish diet datasets available globally. Atlantic cod is one of the most ecologically ...

    • Eastern Scotian Shelf and Barents Sea intercomparison: climate fluctuations, human impact, and system resilience 

      Johannesen, Edda; Skern-Mauritzen, Mette; Ingvaldsen, Randi; Stiansen, Jan Erik; Orlova, Emma L. (ICES CM documents;2010/S:10, Working paper, 2010)

    • Egner vintertoktet seg til overvåking av endringer i fiskesamfunnet i Barentshavet? : en gjennomgang av metodikk og data fra 1981-2007 

      Johannesen, Edda; Wenneck, Thomas de Lange; Høines, Åge S.; Aglen, Asgeir; Mehl, Sigbjørn; Mjanger, Hildegunn; Fotland, Åge; Halland, Tor Ivar; Jakobsen, Tore (Fisken og havet, Research report, 2009-12-10)
      The winter survey (1981-) is the longest bottom trawl time series in the Barents Sea. The survey is used as tuning series in cod and haddock assessment, but change and ecosystem-based management, necessitates the study of ...

    • Feeding in a heterogeneous environment: spatial dynamics in summer foraging Barents Sea cod 

      Johannesen, Edda; Lindstrøm, Ulf; Michalsen, Kathrine; Skern-Mauritzen, Mette; Fauchald, Per; Bogstad, Bjarte; Dolgov, Andrey V. (Journal article; Peer reviewed, 2012-07-03)
      Cod Gadus morhua are important predators in many ecosystems in the North Atlantic, but their ecological importance has diminished in many areas due to stock size reductions. In contrast, the Barents Sea cod stock is ...

    • Feeding of mature cod (Gadus morhua) on the spawning grounds in Lofoten 

      Michalsen, Kathrine; Johannesen, Edda; Bogstad, Bjarte (Journal article; Peer reviewed, 2008-03-19)
      Many authors state that cod (Gadus morhua) do not feed during the spawning period. However, this more or less established fact has rarely been investigated in the field. Here, the content of stomachs from Northeast Arctic ...

    • Fish assemblages at the Yermak Plateau and in northern Svalbard waters during the period 2012-2020 

      Gjøsæter, Harald; Ingvaldsen, Randi Brunvær; Hallfredsson, Elvar Halldor; Johannesen, Edda (Peer reviewed; Journal article, 2023)
      During several surveys covering the north-western and northern Svalbard waters, and the deeper Yermak Plateau north of Svalbard during the period 2012–2020, 291 standardized hauls with a demersal trawl were made. All fishes ...

    • Fish assemblages at the Yermak Plateau and in northern Svalbard waters during the period 2012–2020 

      Gjøsæter, Harald; Ingvaldsen, Randi Brunvær; Hallfredsson, Elvar Halldor; Johannesen, Edda (Peer reviewed; Journal article, 2023)
      During several surveys covering the north-western and northern Svalbard waters, and the deeper Yermak Plateau north of Svalbard during the period 2012–2020, 291 standardized hauls with a demersal trawl were made. All fishes ...

    • Fish diversity data from the Barents Sea Ecosystem Survey 2004-2019 

      Johannesen, Edda; Wienerroither, Rupert; Mørk, Herdis Langøy; Husson, Berengere; Holmin, Arne Johannes; Johnsen, Espen; Dolgov, Andrey; Prokhorova, Tatiana (Rapport fra havforskningen;2021 - 15, Research report, 2021)
      Assessing and improving the status of biodiversity are main targets of international agreements such as the Convention on Biological Diversity and the associated Aichi Biodiversity Targets for 2020. Here we present fish ...

    • Fish investigations in the Barents Sea winter 2007-2012 

      Mehl, Sigbjørn; Aglen, Asgeir; Bogstad, Bjarte; Dingsør, Gjert Endre; Gjøsæter, Harald; Johannesen, Edda; Korsbrekke, Knut; Staby, Arved; Wenneck, Thomas de Lange; Alexandrov, Dmitry I.; Murashko, Pavel A.; Prozorkevich, Dmitry; Smirnov, Oleg (IMR/PINRO Joint Report Series;1/2013, Research report, 2013)

    • Fish investigations in the Barents Sea winter 2013-2014 

      Mehl, Sigbjørn; Aglen, Asgeir; Bogstad, Bjarte; Dingsør, Gjert Endre; Gjøsæter, Harald; Godiksen, Jane; Johannesen, Edda; Korsbrekke, Knut; Staby, Arved; Wenneck, Thomas de Lange; Wienerroither, Rupert; Murashko, Pavel A.; Russkikh, Alexey (IMR/PINRO Joint Report Series;2/2014, Research report, 2014)

    • Gytefeltskartlegging Nordøstarktisk hyse: Toktnummer 2022609 

      Johannesen, Edda; Gabrielsen, Heidi Kathrine; Frøysa, Håvard G; Holm, Else Agnete; Husebø, Åse; Pedersen, Ronald; Petersen, Marianne; Seim, Silje Elisabeth (Toktrapport;2022 - 8, Research report, 2022)
      Gytekartleggingstokt for nordøstarktisk hyse ble gjennomført 8. -19. april 2022 med FF Kristine Bonnevie. Toktet startet i Bodø og ble avsluttet i Tromsø. Toktet dekket det antatte gyteområdet langs Eggakanten mellom ...

    • Havets ressurser og miljø 2009 

      Gjøsæter, Harald; Dommasnes, Are; Falkenhaug, Tone; Hauge, Marie; Johannesen, Edda; Olsen, Erik; Skagseth, Øystein (Fisken og havet, særnummer, Research report, 2009-04)

    • Havets ressurser og miljø 2009 

      Gjøsæter, Harald; Dommasnes, Are; Falkenhaug, Tone; Hauge, Marie; Johannesen, Edda; Olsen, Erik; Skagseth, Øystein (Fisken og havet, særnummer, Research report, 2009-04)

    • Highly mixed impacts of near-future climate change on stock productivity proxies in the North East Atlantic 

      Kjesbu, Olav Sigurd; Sundby, Svein; Sandø, Anne Britt; Alix, Maud; Hjøllo, Solfrid Sætre; Tiedemann, Maik; Skern-Mauritzen, Mette; Junge, Claudia; Fossheim, Maria; Broms, Cecilie; Søvik, Guldborg; Zimmermann, Fabian; Nedreaas, Kjell Harald; Eriksen, Elena; Höffle, Hannes; Hjelset, Ann Merete; Kvamme, Cecilie; Reecht, Yves; Knutsen, Halvor; Aglen, Asgeir; Albert, Ole Thomas; Berg, Erik; Bogstad, Bjarte; Durif, Caroline; Halvorsen, Kim Aleksander Tallaksen; Høines, Åge Sigurd; Hvingel, Carsten; Johannesen, Edda; Johnsen, Espen; Moland, Even; Myksvoll, Mari Skuggedal; Nøttestad, Leif; Olsen, Erik Joel Steinar; Skaret, Georg; Skjæraasen, Jon Egil; Slotte, Aril; Staby, Arved; Stenevik, Erling Kåre; Stiansen, Jan Erik; Stiasny, Martina H.; Sundet, Jan Henry; Vikebø, Frode Bendiksen; Huse, Geir (Peer reviewed; Journal article, 2021)
      Impacts of climate change on ocean productivity sustaining world fisheries are predominantly negative but vary greatly among regions. We assessed how 39 fisheries resources—ranging from data-poor to data-rich stocks—in the ...

    • Hva spiser torsken til middag? 

      Johannesen, Edda; Bogstad, Bjarte; Gjøsæter, Harald (Havforskningsnytt, Working paper, 2004)

    • 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 ...