Browsing Brage IMR by Author "Strand, Espen"

Now showing items 1-20 of 29

    • Can mesopelagic mixed layers be used as feed source for salmon aquaculture ? 

      Olsen, Rolf Erik; Strand, Espen; Melle, Webjørn Raunsgård; Nørstebø, Jo Trelvik; Lall, Santosh P.; Tocher, Douglas R.; Sprague, Matthew (Journal article; Peer reviewed, 2019)
      Salmon aquaculture is in great need of good quality balanced protein and lipid sources, particularly marine omega-3 (n-3) long-chain polyunsaturated fatty acids (LC-PUFA), to sustain a further development of the industry. ...

    • Comparison of two multiple plankton samplers: MOCNESS and Multinet Mammoth 

      Strand, Espen; Broms, Cecilie Thorsen; Bagøien, Espen; Knutsen, Tor; Arnesen, Hilde; Mozfar, Bahar (Peer reviewed; Journal article, 2022)
      To ensure an optimal continuation of a long time series of zooplankton monitoring surveys, two types of equipment for depth-stratified mesozooplankton sampling were compared. The Institute of Marine Research (Norway) has ...

    • The Continuous Plankton Recorder Survey – Monitoring plankton in the Nordic Sea 

      Edwards, M.; Helaouet, P.; Ostle, C.; Wootton, M.; Strand, Espen; Bagøien, Espen (Chapter, 2018)
      The warm-temperate calanoid copepod Calanus helgolandicus is becoming more common in the Nordic Seas with high records in 2016, which continued into 2017. The Pacific diatom Neodenticula seminae (an indicator of trans-Arctic ...

    • 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 ...

    • Distribution and composition of mesopelagic macroplankton and micronekton in the North-east Atlantic 

      Garcia-Seoane, E.; Klevjer, Thor A.; Knutsen, Tor; Macaulay, Gavin; Mork, Kjell Arne; Rosen, Shale; Strand, Espen; Wienerroither, Rupert; Underwood, Melanie; Melle, Webjørn Raunsgård (Lecture, 2018)

    • Does seismic have an effect on zooplankton? - Field study at Ekofisk with RV Kristine Bonnevie 

      Utne-Palm, Anne Christine; de Jong, Karen; Pedersen, Geir; Klevjer, Thor A.; Titelman, Josefin; Strand, Espen; Vereide, Emilie Hernes; Kühn, Saskia; Hannaas, Sigurd; Totland, Atle; Buschmann, Håvard Johnsen; Mihaljevic, Marina; Strømme, Rune; Johannesen, Reidar (Toktrapport;2022 - 9, Research report, 2022)
      Toktnr: 2022611

    • Dynamics of phytoplankton species composition, biomass and nutrients in the North Atlantic during spring and summer - A trans-Atlantic study 

      Naustvoll, Lars Johan; Melle, Webjørn Raunsgård; Klevjer, Thor A.; Drinkwater, Kenneth F.; Strand, Espen; Knutsen, Tor (Peer reviewed; Journal article, 2020)
      During a return trip in May–June 2013 from Bergen, Norway, to Nuuk, Greenland, on the Institute of Marine Research's R/V “G. O. Sars”, four ocean basins, the Norwegian, Iceland, Irminger and Labrador seas, were surveyed ...

    • Ecology of mesozooplankton across four North Atlantic basins 

      Strand, Espen; Klevjer, Thor A.; Melle, Webjørn Raunsgård; Knutsen, Tor (Peer reviewed; Journal article, 2020)
      A comparative study of the mesozooplankton in four North Atlantic basins is presented. During a trans-Atlantic expedition with R/V G.O. Sars in May and June 2013, the Norwegian Sea, Iceland Sea, Irminger Sea and Labrador ...

    • Feeding ecology of Benthosema glaciale across the North Atlantic 

      Knutsen, Tor; Strand, Espen; Klevjer, Thor A.; Salvanes, Anne Gro Vea; Broms, Cecilie; Sunde, Synne Myhre; Aksnes, Dag Lorents; García-Seoane, Eva; Melle, Webjørn Raunsgård (Peer reviewed; Journal article, 2023)
      The glacier lanternfish Benthosema glaciale is a key myctophid with a wide distribution in the northern Atlantic. It is a species that has a strong vertical migration capacity and have the potential to move between the ...

    • Fine-scale observations of physical and biological environment along a herring feeding migration route 

      Melle, Webjørn Raunsgård; Klevjer, Thor A.; Strand, Espen; Wiebe, Peter H.; Slotte, Aril; Huse, Geir (Peer reviewed; Journal article, 2020)
      We observed herring horizontal and vertical distribution during feeding migration along a 128 km transect across the Arctic front of the Norwegian and Iceland seas, in early June, in relation to its physical, chemical and ...

    • Genetics in the ocean’s twilight zone: Population structure of the glacier lanternfish across its distribution range 

      Quintela, Maria; Garcia-Seoane, Eva; Dahle, Geir; Klevjer, Thor A.; Melle, Webjørn; Lille-Langøy, Roger; Besnier, Francois; Tsagarakis, Konstantinos; Geoffroy, Maxime; Rodríguez-Ezpeleta, Naiara; Jacobsen, Eugenie; Côté, David; Knutar, Sofie; Unneland, Laila; Strand, Espen; Glover, Kevin (Dataset, 2024)
      Dataset for "Genetics in the ocean’s twilight zone: Population structure of the glacier lanternfish across its distribution range", published in Evolutionary Applications, a Wiley journal The information deposited ...

    • Latitudinally distinct stocks of Atlantic cod face fundamentally different biophysical challenges under on-going climate change 

      Kjesbu, Olav Sigurd; Alix, Maud; Sandø, Anne Britt; Strand, Espen; Wright, Peter J.; Johns, David G.; Thorsen, Anders; Marshall, C. Tara; Bakkeplass, Kjell Gunnar; Vikebø, Frode Bendiksen; Myksvoll, Mari Skuggedal; Ottersen, Geir; Allan, Bridie Jean Marie; Fossheim, Maria; Stiansen, Jan Erik; Huse, Geir; Sundby, Svein (Peer reviewed; Journal article, 2023)
      The reproductive success of marine ectotherms is especially vulnerable in warming oceans due to alterations in adult physiology, as well as embryonic and larval survival prospects. These vital responses may, however, differ ...

    • Latitudinally distinct stocks of Atlantic cod face fundamentally different biophysical challenges under on-going climate change 

      Kjesbu, Olav Sigurd; Alix, Maud; Sandø, Anne Britt; Strand, Espen; Wright, Peter J.; Johns, David G.; Thorsen, Anders; Marshall, C. Tara; Bakkeplass, Kjell Gunnar; Vikebø, Frode Bendiksen; Myksvoll, Mari Skuggedal; Ottersen, Geir; Allan, Bridie Jean Marie; Fossheim, Maria; Stiansen, Jan Erik; Huse, Geir; Sundby, Svein (Peer reviewed; Journal article, 2023)
      The reproductive success of marine ectotherms is especially vulnerable in warming oceans due to alterations in adult physiology, as well as embryonic and larval survival prospects. These vital responses may, however, differ ...

    • Mass estimates of individual gas-bearing mesopelagic fish from in situ wideband acoustic measurements ground-truthed by biological net sampling 

      Agersted, Mette Dalgaard; Khodabandeloo, Babak; Klevjer, Thor A.; García-Seoane, Eva; Strand, Espen; Underwood, Melanie; Melle, Webjørn Raunsgård (Peer reviewed; Journal article, 2021)
      A new acoustic approach to estimate the mass of individual gas-bearing fish at their resident depth at more than 400 m was tested on Cyclothone spp.. Cyclothone are small and slender, and possibly numerically underestimated ...

    • Mesopelagic Species and Their Poential Contribution to Food and Feed Security - A Case Study from Norway 

      Kjellevold, Marian; Strand, Espen; Sanden, Monica; Wiech, Martin (Peer reviewed; Journal article, 2020)
      The projected increase in global population will demand a major increase in global food production. There is a need for more biomass from the ocean as future food and feed, preferentially from lower trophic levels. In this ...

    • Micronekton biomass distribution, improved estimates across four north Atlantic basins 

      Klevjer, Thor A.; Melle, Webjørn Raunsgård; Knutsen, Tor; Strand, Espen; Korneliussen, Rolf; Dupont, Nicolas; Salvanes, Anne Gro Vea; Wiebe, Peter H. (Peer reviewed; Journal article, 2019)
      Distribution of micronekton was investigated during early summer of 2013, using data from a cruise covering the central parts of four north Atlantic basins, the Norwegian Sea (NS), Iceland Sea (ICS), Irminger Sea (IRS), ...

    • The One Ocean Expedition: Science and Sailing for the Ocean We Want 

      Huse, Geir; Baussant, Thierry; Becker, Meike; Biuw, Martin; Bødtker, Gunhild; Cook, Jeremy; Gomiero, Alessio; Grøsvik, Bjørn Einar; Handegard, Nils Olav; Hestnes, Arne Johan; Hole, Lars Robert; Husson, Berengere; Jaccard, Pierre Franqois; Johannessen, Johnny Andre; Krolicka, Adriana; Lien, Vidar Surén; Lindemann, Christian; Olsen, Are; Renner, Angelika; Lid, Sjur Ringheim; Steen-Larsen, Hans Christian; Strand, Espen; Westgaard, Jon-Ivar; Pedersen, Geir (Rapport fra havforskningen;2023 - 34, Research report, 2023)
      The One Ocean Expedition (OOE) was a 20-month long circumnavigation of the globe by the Norwegian sail training vessel Statsraad Lehmkuhl, and a recognised part of the UN decade of Ocean Science for Sustainable Development. ...

    • Overwintering distribution, inflow patterns and sustainability of Calanus finmarchicus in the North Sea 

      Gao, Shuang; Hjøllo, Solfrid Sætre; Falkenhaug, Tone; Strand, Espen; Edwards, Martin; Skogen, Morten D. (Peer reviewed; Journal article, 2021)
      Calanoid copepods are key taxa in the North Sea as they are the main food source for many fish stocks, such as herring, mackerel and cod. In this study we use an individual-based model for Calanus finmarchicus embedded in ...

    • 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)