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Espen Johnsen

C%3A%5CUsers%5Ckjersti%5CDesktop%5CEspen Johnsen
Head of Research/ Research Manager
Telephone: 90606394
Department: Pelagisk fisk

Publications

Academic articles

2024

Uncrewed surface vehicles (USVs) as platforms for fisheries and plankton acoustics

Nils Olav Handegard, Alex De Robertis, Arne Johannes Holmin, Espen Johnsen, Joshua Lawrence, Naig Le Bouffant, Richard O'driscoll, David Peddie, Geir Pedersen, Pierre Priou, Rabea Patricia Rogge, Mikal Arntzen Samuelsen, David A. Demer
ICES Journal of Marine Science
2024

Broadband backscattering by Atlantic herring (Clupea harengus L.) differs when measured from a research vessel vs. a silent uncrewed surface vehicle

Geir Pedersen, Espen Johnsen, Babak Khodabandeloo, Nils Olav Handegard
ICES Journal of Marine Science
2024

Oil droplet fouling on lesser sandeel (Ammodytes marinus) eggshells does not enhance the crude oil induced developmental toxicity

Elin Sørhus, Reidun Marie Bjelland, Caroline Durif, Espen Johnsen, Carey Donald, Sonnich Meier, Trond Nordtug, Frode Bendiksen Vikebø, Prescilla Perrichon
Journal of Hazardous Materials 468
2023

Early ontogeny of the lesser sandeel (Ammodytes marinus)

Prescilla Perrichon, Reidun Marie Bjelland, Caroline Durif, Ingrid Uglenes Fiksdal, Espen Johnsen, Anne Berit Skiftesvik, Alessandro Cresci, Howard Browman, Elin Sørhus
Developmental Dynamics
2023

WORKSHOP ON UNAVOIDABLE SURVEY EFFORT REDUCTION 2 (WKUSER2)

Sean C. Anderson, Nate Bacheler, Lewis Barnett, Casper Willestofte Berg, Kristan Blackhart, Derek Bolser, Patrik Börjesson, Meaghan Bryan, Thibault Cariou, Corina Chaves, Elizabeth Chilton, Jason Conner, Annica De Groote, Lukas DeFilippo, Paul Dolder, Catherine Foley, Hans Gerritsen, Madison Hall, Espen Johnsen, Eoghan Kelly, Stan Kotwicki, Sven Kupschus, Gwladys Lambert, Andy Lipsky, Emily Markowitz, Guillermo Martin, Angelia Miller, Coilin Minto, Bríd O'Connor, Kotaro Ono, Zack Oyafuso, Iosu Paradinas, Maria Grazia Pennino, Elizabeth Phillips, John Gabriel Ramirez, Yves Reecht, Paul Regular, Margaret Siple, Matt Siskey, David Stokes, Anna Stroh, James T. Thorson, Ralf van Hal, Joel Vigneau, Daniel Vilas, Kai Wieland, Semra Yalcin
ICES Scientific Reports 5
2022

Magnetic fields generated by the DC cables of offshore wind farms have no effect on spatial distribution or swimming behavior of lesser sandeel larvae (Ammodytes marinus)

Alessandro Cresci, Prescilla Perrichon, Caroline Durif, Elin Sørhus, Espen Johnsen, Reidun Marie Bjelland, Torkel Larsen, Anne Berit Skiftesvik, Howard Browman
Marine Environmental Research 176
2022

Kayak Drone – a silent acoustic unmanned surface vehicle for marine research

Atle Totland, Espen Johnsen
Frontiers in Marine Science 9
2021

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

Olav Sigurd Kjesbu, Svein Sundby, Anne Britt Sandø, Maud Alix, Solfrid Sætre Hjøllo, Maik Tiedemann, Mette Skern-Mauritzen, Claudia Junge, Maria Fossheim, Cecilie Broms, Guldborg Søvik, Fabian Zimmermann, Kjell Harald Nedreaas, Elena Eriksen, Hannes Höffle, Ann Merete Hjelset, Cecilie Kvamme, Yves Reecht, Halvor Knutsen, Asgeir Aglen, Ole Thomas Albert, Erik Berg, Bjarte Bogstad, Caroline Durif, Kim Aleksander Tallaksen Halvorsen, Åge Sigurd Høines, Carsten Hvingel, Edda Johannesen, Espen Johnsen, Even Moland, Mari Skuggedal Myksvoll, Leif Nøttestad, Erik Joel Steinar Olsen, Georg Skaret, Jon Egil Skjæraasen, Aril Slotte, Arved Staby, Erling Kåre Stenevik, Jan Erik Stiansen, Martina H. Stiasny, Jan Henry Sundet, Frode Bendiksen Vikebø, Geir Huse
Fish and Fisheries 23 p. 601-615
2021

Killer whale movements on the Norwegian shelf are associated with herring density

Emma Vogel, Martin Biuw, Marie-Anne Blanchet, Ian D. Jonsen, Evert Mul, Espen Johnsen, Solfrid Sætre Hjøllo, Morten Tange Olsen, Rune Dietz, Audun Rikardsen
MEPS
2021

Predicting abundance indices in areas without coverage with a latent spatio-temporal Gaussian model

Olav Nikolai Breivik, Fredrik L Aanes, Guldborg Søvik, Asgeir Aglen, Sigbjørn Mehl, Espen Johnsen
ICES Journal of Marine Science
2020

In situ calibration of observatory broadband echosounders

Egil Ona, Guosong Zhang, Geir Pedersen, Espen Johnsen
ICES Journal of Marine Science 77 p. 2954-2959
2020

Long term acoustic time series of the Lofoten–Vesterålen ocean observatory

Geir Pedersen, Guosong Zhang, Ana Sofia Aniceto, Espen Johnsen
Journal of the Acoustical Society of America 148
2020

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

Vanesa Lopez-vazquez, Jose Manuel Lopez-guede, Simone Marini, Emanuela Fanelli, Espen Johnsen, J. Aguzzi
Sensors 20 p. 1-25
2020

in situ calibration of observatory broadband echosounders

Egil Ona, Guosong Zhang, Geir Pedersen, Espen Johnsen
ICES Journal of Marine Science
2020

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

Georg Skaret, Geir Odd Johansen, Espen Johnsen, Johanna Jennifer Elisabeth Fall, Øyvind Fiksen, Gøran Englund, Per Fauchald, Harald Gjøsæter, Gavin Macaulay, Edda Johannesen
Marine Ecology Progress Series 638 p. 13-23
2020

Acoustic classification in multifrequency echosounder data using deep convolutional neural networks

Olav Brautaset, Anders Ueland Waldeland, Espen Johnsen, Ketil Malde, Line Eikvil, Arnt-Børre Salberg, Nils Olav Handegard
ICES Journal of Marine Science 77 p. 1391-1400
2020

Measurements of underwater noise radiated by commercial ships at a cabled ocean observatory

Guosong Zhang, Tonje Nesse Forland, Espen Johnsen, Geir Pedersen, Hefeng Dong
Marine Pollution Bulletin 153
2019

Underwater noise from wind at the high north LoVe ocean observatory

Lars Alf Ødegaard, Geir Pedersen, Espen Johnsen
p. 359-366
2019

StoX: An open source software for marine survey analyses

Espen Johnsen, Atle Totland, Åsmund Skålevik, Arne Johannes Holmin, Gjert Endre Dingsør, Edvin Fuglebakk, Nils Olav Handegard
Methods in Ecology and Evolution 10 p. 1523-1528
2019

Cabled ocean observatory data reveal food supply mechanisms to a cold-water coral reef

Tom Van Engeland, Olav Rune Godø, Espen Johnsen, Gerard C.A. Duineveld, Dick Van Oevelen
Progress in Oceanography 172 p. 51-64
2018

Multispecies acoustic dead-zone correction and bias ratio estimates between acoustic and bottom-trawl data

Kotaro Ono, Stan Kotwicki, Gjert Endre Dingsør, Espen Johnsen
ICES Journal of Marine Science 75 p. 361-373
2017

Collective structures anchor massive schools of lesser sandeel to the seabed, increasing vulnerability to fishery

Espen Johnsen, Guillaume Rieucau, Egil Ona, Georg Skaret
Marine Ecology Progress Series 573 p. 229-236
2016

Acoustic identification of marine species using a feature library

Rolf Korneliussen, Yngve Heggelund, Gavin Macaulay, Daniel Patel, Espen Johnsen, Inge Kristian Eliassen
Methods in oceanography 17 p. 187-205
2015

An evaluation of the bottom trawl surveys in the Benguela Current Large Marine Ecosystem

Bjørn Erik E Axelsen, Espen Johnsen
Fisheries Oceanography 24 p. 74-87
2014

Marine ecosystem acoustics (MEA): Quantifying processes in the sea at the spatio-temporal scales on which they occur

Olav Rune Godø, Nils Olav Handegard, Howard Browman, Gavin Macaulay, Stein Kaartvedt, Jarl Giske, Egil Ona, Geir Huse, Espen Johnsen
ICES Journal of Marine Science 71 p. 2357-2369
2014

A new model for simulating growth in fish

Johannes Hamre, Espen Johnsen, Kristin Hamre
PeerJ 2013
2013

Small-scale spatial structuring of burrowed sandeels and the catching properties of the dredge

Espen Johnsen, Alf Harbitz
ICES Journal of Marine Science 70 p. 379-386
2012

A robust method for generating separate catch time-series for each of the hake species caught in the Namibian trawl fishery

Espen Johnsen, J. Kathena
South African Journal of Marine Science 34 p. 43-53
2011

Foetal deformities in a smooth-hound shark, Mustelus mustelus, from an oil exploited area in Angola

Diana Zaera-Perez, Espen Johnsen
Cybium 35 p. 231-236
2009

Size-dependent frequency response of sandeel schools

Espen Johnsen, Ronald Pedersen, Egil Ona
ICES Journal of Marine Science 66 p. 1100-1105

Other journal contributions

2022

Erratum: Correction: Lopez-Vazquez et al. Video Image Enhancement and Machine Learning Pipeline for Underwater Animal Detection and Classification at Cabled Observatories. Sensors 2020, 20, 726 (Sensors (Basel, Switzerland) (2020) 20 3 PII: 16)

Vanesa Lopez-Vazquez, Jose Manuel Lopez-Guede, Simone Marini, Emanuela Fanelli, Espen Johnsen, Jacopo Aguzzi
Sensors 23
2020

Long term acoustic time series of the Lofoten–Vesterålen ocean observatory

Geir Pedersen, Guosong Zhang, Ana Sofia Aniceto, Espen Johnsen
Journal of the Acoustical Society of America 148
2019

The Lofoten-Vesterålen Ocean Observatory—A cabled infrastructure for operational acoustical oceanography

Geir Pedersen, Espen Johnsen, Lars Alf Ødegaard, Guosong Zhang, Endre Grimsbø, Gavin Macaulay, Tor Arne Reinen, Anders Hermansen
Journal of the Acoustical Society of America 146

Scientific lectures

2024

Identifying size and behavior of Mueller’s Pearlside (Maurolicus muelleri) by combining measured broadband frequency responses with backscattering models and in-trawl observations

Maria Tenningen, Geir Pedersen, Babak Khodabandeloo, Nils Olav Handegard, Tonje Nesse Forland, Thor A. Klevjer, Espen Johnsen
2024

Behaviour and platform dependent broadband backscattering by physostome fish (Clupea harengus L.) revisited

Geir Pedersen, Babak Khodabandeloo, Espen Johnsen, Nils Olav Handegard
2024

Testing acoustic data quality and performance on Sounder USV

Nils Olav Handegard, Arne Johannes Holmin, Espen Johnsen, Rolf Korneliussen, Geir Pedersen, Joakim Skjefstad, Rabea Patricia Rogge, Mikal Arntzen Samuelsen
2023

Action plan for implementing USV in acoustic trawl surveys. CRIMAC – Workshop on Fisheries acoustics and Uncrewed Surface Vehicles.

Johnsen, Espen
2023

Spatial structure and sensitivity of lesser sandeel to increasing pressure of human activities filling knowledge gaps and improved risk assessment : KnowSandeel 2.0

Elin Sørhus, Frode Bendiksen Vikebø, Espen Johnsen
2023

Tobis en nøkkelart -hvor sårbar er de ulike livsfasene hos tobis for menneskelig aktivitet i Nordsjøen og Norskekysten?

Elin Sørhus, Frode Bendiksen Vikebø, Espen Johnsen
2023

Towards a multi-platform armada strategy for ecosystem based marine surveys

Espen Johnsen, Nils Olav Handegard, Atle Totland, Arne Johannes Holmin, Cecilie Kvamme, Are Salthaug, Geir Huse
2023

Behaviour dependent broadband backscattering by physostomous fish (Clupea harengus L.)

Geir Pedersen, Nils Olav Handegard, Espen Johnsen
2022

Developing and deploying machine learning methods for acoustic data

Nils Olav Handegard, Olav Brautaset, Changkyu Choi, Tomasz Furmanek, Arne Johan Hestnes, Espen Johnsen, Alba Ordonez, Ingrid Utseth, Sindre Vatnehol, Geir Huse
2021

CRIMAC - Center for Research-based Innovation in Marine Acoustic Abundance Estimation and Backscatter Classification

Nils Olav Handegard, Tonje Nesse Forland, Espen Johnsen, Geir Pedersen, Maria Tenningen, Egil Ona
2019

Underwater noise from wind at the high north LoVe ocean observatory

Lars Alf Ødegaard, Geir Pedersen, Espen Johnsen
2019

Acoustic measurements of herring close to the sea surface

Espen Johnsen, Atle Totland, Rokas Kubilius, Egil Ona
2018

Sea2Data - from acquisition to advice

Sjur Ringheim Lid, Åge Fotland, Harald Gjøsæter, Espen Johnsen, Jens-Otto Krakstad, Helge Sagen, Edvin Fuglebakk, Nils Olav Handegard
2017

In situ study of the functional response of cod to capelin using broadband acoustics and trawl sampling

Georg Skaret, Johanna Jennifer Elisabeth Fall, Per Fauchald, Øyvind Fiksen, Harald Gjøsæter, Edda Johannesen, Geir Odd Johansen, Espen Johnsen, Gavin Macaulay
2016

Sea2Data - from data acquisition to advice

Sjur Ringheim Lid, Åge Fotland, Harald Gjøsæter, Espen Johnsen, Jens-Otto Krakstad, Helge Sagen, Thomas de Lange Wenneck, Nils Olav Handegard
2015

Increasing the precision in acoustic estimates of patchy distributed fish

Espen Johnsen, Egil Ona, Alf Harbitz, Hector Pena, Arne Johannes Holmin
2013

"StoX" - an open source approach to survey calculations

Atle Totland, Harald Gjøsæter, Nils Olav Handegard, Espen Johnsen, Sjur Ringheim Lid
2013

Variance and estimates of number of individuals from acoustic surveys

Knut Korsbrekke, Gjert Endre Dingsør, Espen Johnsen
2012

Kvoteutsiktene for de viktigste fiskeslagene de neste 5 årene

Ole Arve Misund, Bjarte Bogstad, tore Haug, Elvar H. Hallfredsson, Irene Huse, Carsten Hvingel, Åge Sigurd Høines, Randi Ingvaldsen, Espen Johnsen, Leif Nøttestad, Erling Kåre Stenevik, Sigurd Tjelmeland, Else Torstensen, Nils Inge Øien

Poster

2024

Embryos of lesser sandeel (Ammodytes marinus) are robust to crude oil exposure

Elin Sørhus, Reidun Marie Bjelland, Caroline Durif, Espen Johnsen, Carey Donald, Sonnich Meier, Trond Nordtug, Frode Bendiksen Vikebø, Prescilla Perrichon
2023

Classifying fish with broadband acoustics; behaviour and platform dependent broadband backscattering by physostomous fish (Clupea harengus L.). From Echosounders to the Cloud: Transforming Acoustic Data to Information.

Geir Pedersen, Nils Olav Handegard, Babak Khodabandeloo, Espen Johnsen
2023

Centre for research based innovation in marine acoustic abundance estimation and backscatter classification (CRIMAC)

Nils Olav Handegard, Tonny Algrøy, Inge Kristian Eliassen, Tonje Nesse Forland, Espen Johnsen, Audun Oppedal Pedersen, Geir Pedersen, Maria Tenningen, Ingrid Utseth
2022

IMPACT OF CHRONIC OIL POLLUTION ON RECRUITMENT OF PREY SPECIES - KnowSandeel Project

Prescilla Perrichon, Reidun Marie Bjelland, Caroline Durif, Espen Johnsen, Elin Sørhus
2018

Towards seamless integration of data and processing software: data products generated from machine-to-machine interfaces

Nils Olav Handegard, Harald Gjøsæter, Espen Johnsen, Sjur Ringheim Lid, Erik Joel Steinar Olsen, Helge Sagen, Ibrahim Umar, Geir Huse

Reports and dissertations

2024

Liste over forvaltningsrelevante naturenheter - Oppfølgende informasjon til rapporten "Forvaltningsrelevante naturenheter i sjø"

Jonatan Fredricson Marquez, Gro Ingleid van der Meeren, Terje van der Meeren, Jon Albretsen, Rebecca Ross, Henning Steen, Kjell Magnus Norderhaug, Kim Aleksander Tallaksen Halvorsen, Stein Mortensen, Halvor Knutsen, Jonas Thormar, Per Erik Jorde, Elisabeth Helene Juliussen, Tone Kroglund, Carla Freitas, Guldborg Søvik, Tina Kutti, Lars Johan Naustvoll, Mette Skern-Mauritzen, Johanna Myrseth Aarflot, Even Moland, Gayantonia Franzè, Florian Berg, Ellen Sofie Grefsrud, Fabian Zimmermann, Edda Johannesen, Erlend Langhelle, Halvard Aas Midtun, Jane Aanestad Godiksen, Johanna Jennifer Elisabeth Fall, Jon Egil Skjæraasen, Knut Korsbrekke, Magnus Aune, Sigmund Grønnevik, Pål Buhl-Mortensen, Erik Berg, Kjell Harald Nedreaas, Rupert Wienerroither, Mats Brockstedt Olsen Huserbråten, Cecilie Kvamme, Espen Johnsen, Per Arneberg, Sigurd Heiberg Espeland
Rapport fra havforskningen
2024

Fangstprøvelotteriet 2023 - erfaringer og resultat

Håkon Magne Otterå, Lise Heggebakken, Åge Sigurd Høines, Espen Johnsen, Cecilie Kvamme, Leif Nøttestad, Georg Skaret, Erling Kåre Stenevik, Bjørn Vidar Svendsen
Rapport fra havforskningen
2024

Fordeling og mengde av tobis i norsk sone av Nordsjøen i mai 2023 — Tobistokt i Nordsjøen 23. april – 13. mai 2023

Espen Johnsen, Hector Pena, Ronald Pedersen, Åse Husebø, Lisbet Solbakken
Toktrapport
2024

Foreløpig råd for tobisfiske i norsk økonomisk sone i 2024 - Faglig grunnlag

Espen Johnsen, Cecilie Kvamme
Rapport fra havforskningen
2024

Survey report for CRIMAC SFI 2023

Nils Olav Handegard, Vaneeda Allken, Arne Johannes Holmin, Espen Johnsen, Rolf Korneliussen, Geir Pedersen, Joakim Skjefstad, Rabea Patricia Rogge, Mikal Arntzen Samuelsen, Maria Tenningen, Lise Doksæter Sivle
Toktrapport
2023

Fangstprøvelotteriet 2022 - erfaringer og resultat

Georg Skaret, Justine Emmanuelle Diaz, Lise Heggebakken, Lea Marie Hellenbrecht, Åge Sigurd Høines, Espen Johnsen, Cecilie Kvamme, Leif Nøttestad, Are Salthaug, Erling Kåre Stenevik, Bjørn Vidar Svendsen, Susanne Tonheim, Håkon Magne Otterå
Rapport fra havforskningen
2023

Spatiotemporal variation in the growth and size distributions of lesser sandeel (Ammodytes marinus) in the north-eastern North Sea

Daniel Berge, Espen Johnsen, Maria Tenningen
2023

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

Guldborg Søvik, Tone Falkenhaug, Fabian Zimmermann, Natalya Gallo, Kjell Harald Nedreaas, Jean-Baptiste Danre, Terje Hovland, Trude Hauge Thangstad, Siri Aaserud Olsen, Espen Johnsen, Lars Asplin
2023

Fangstprøvelotteriet 2021 - erfaringer og resultat

Åge Sigurd Høines, Justine Emmanuelle Diaz, Lise Heggebakken, Lea Marie Hellenbrecht, Espen Johnsen, Cecilie Kvamme, Leif Nøttestad, Are Salthaug, Georg Skaret, Erling Kåre Stenevik, Bjørn Vidar Svendsen, Susanne Tonheim, Håkon Magne Otterå
2023

Foreløpige råd for tobisfiskeriet i norsk økonomisk sone 2023

Johnsen, Espen
2023

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

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

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

Per Arneberg, Berengere Husson, Anna Siwertsson, Jon Albretsen, Knut Yngve Børsheim, Côme Denechaud, Joël Durant, Tone Falkenhaug, Per Fauchald, Anders Martin Frugård Opdal, Sissel Jentoft, Tore Johannessen, Espen Johnsen, Elizabeth Marie Jones, Cecilie Kvamme, Anna Jeja Gabriella Ljungström, Pål Buhl-Mortensen, Yves Reecht, Hiroko Kato Solvang, Morten D. Skogen, Aril Slotte, Espen Strand, Guldborg Søvik, Gro Ingleid van der Meeren
2022

Fangstprøvelotteriet 2020 – erfaringer og resultat

Åge Sigurd Høines, Espen Johnsen, Cecilie Kvamme, Leif Nøttestad, Håkon Magne Otterå, Are Salthaug, Erling Kåre Stenevik, Bjørn Vidar Svendsen
2022

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

Johnsen, Espen
2022

CRIMAC - Annual Report 2021

Nils Olav Handegard, Geir Pedersen, Tonje Nesse Forland, Maria Tenningen, Espen Johnsen
2022

Spatiotemporal Variation in the Density Distribution of Sprat (Sprattus Sprattus) in Hardangerfjorden and Sognefjorden

Daniel Jarl Skåtøy Stiti, Espen Johnsen, Cecilie Kvamme, Arild Folkvord
2021

CRIMAC - Annual Report 2020

Egil Ona, Nils Olav Handegard, Geir Pedersen, Tonje Nesse Forland, Maria Tenningen, Espen Johnsen
2021

Kunnskapsstatus for havsil i norsk sone av Nordsjøen

Espen Johnsen, Elin Sørhus, Karen de Jong, Kai Kristoffer Lie, Bjørn Einar Grøsvik
2021

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

Edda Johannesen, Rupert Wienerroither, Herdis Langøy Mørk, Berengere Husson, Arne Johannes Holmin, Espen Johnsen, Andrey Dolgov, Tatiana Prokhorova
2021

Final report for the REDUS project - Reduced Uncertainty in Stock Assessment

Erik Joel Steinar Olsen, Sondre Aanes, Magne Tommy Aldrin, Olav Nikolai Breivik, Edvin Fuglebakk, Daisuke Goto, Nils Olav Handegard, Cecilie Hansen, Arne Johannes Holmin, Daniel Howell, Espen Johnsen, Natoya Jourdain, Knut Korsbrekke, Kotaro Ono, Håkon Magne Otterå, Holly Ann Perryman, Samuel Subbey, Guldborg Søvik, Ibrahim Umar, Sindre Vatnehol, Jon Helge Vølstad
2021

CRIMAC cruise report 2020116

Egil Ona, Nils Olav Handegard, Espen Johnsen, Rokas Kubilius, Rolf Korneliussen, Geir Pedersen, Atle Totland, Shale Rosen, Melanie Underwood, Lars N Andersen, Ivar Wangen, Eirik Svoren Osborg
2020

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

Espen Johnsen, Atle Totland, Cecilie Kvamme
2019

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

Edda Johannesen, Espen Johnsen, Geir Odd Johansen, Knut Korsbrekke
2018

Estimation of acoustic indices with CVs for cod and haddock in the Barents Sea winter survey 1994 – 2017 applying the Sea2Data StoX software.

Sigbjørn Mehl, Asgeir Aglen, Espen Johnsen, Åsmund Skålevik
2018

Estimation of acoustic indices with CVs for Northeast Arctic saithe in the Norwegian coastal survey 2003-2017 applying the Sea2Data StoX software.

Sigbjørn Mehl, Espen Johnsen, Åsmund Skålevik, Asgeir Aglen
2016

Re-estimation of swept area indices with CVs for main demersal fish species in the Barents Sea winter survey 1994-2016 applying the Sea2Data StoX software

Sigbjørn Mehl, Asgeir Aglen, Espen Johnsen
2016

Tobis ved Vestlandet og i Nordsjøen 1950-1990

Magnus Tangen, Johannes Hamre, Espen Johnsen, Odd Nakken, Kjell Harald Nedreaas, Øyvind Tangen, Per Ågotnes
2015

Makrellen er en velsignelse for verden og økosystemene

Leif Nøttestad, Espen Johnsen, Kjell Rong Utne
2014

Assessments for management of living marine resources in the Barents Sea and adjacent waters – a focus on methodology The 16th Russian-Norwegian Symposium Sochi, Russia, 10-12 September 2013

Knut Sunnanå, Yuri A. Kovalev, Harald Gjøsæter, Espen Johnsen, Evgeny Shamray
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