Academic article

• Sørhus, Elin; Bjelland, Reidun Marie; Durif, Caroline et al. (2026). Minimal oil exposure causes sublethal damage in early larval stages of a key prey species, lesser sandeel (Ammodytes marinus). (external link)
• Skaret, Georg; Pena, Hector; Tenningen, Maria et al. (2025). Evaluation of pre-spawning monitoring of Barents Sea capelin for assessment and advice. (external link)
• Handegard, Nils Olav; Holmin, Arne Johannes; Pala, Ahmet et al. (2025). Integrating and assessing machine learning acoustic target classification models for fish survey estimations. (external link)
• Slotte, Aril; Salthaug, Are; Vatnehol, Sindre et al. (2025). Herring spawned poleward following fishery-induced collective memory loss. (external link)
• Komiyama, Sakura; Holmin, Arne Johannes; Pedersen, Geir et al. (2025). Silent uncrewed surface vehicles reveal the diurnal vertical distribution of lesser sandeel. (external link)
• Sørhus, Elin; Bjelland, Reidun Marie; Durif, Caroline et al. (2024). Oil droplet fouling on lesser sandeel (Ammodytes marinus) eggshells does not enhance the crude oil induced developmental toxicity. (external link)
• Handegard, Nils Olav; Robertis, Alex De; Holmin, Arne Johannes et al. (2024). Uncrewed surface vehicles (USVs) as platforms for fisheries and plankton acoustics. (external link)
• Pedersen, Geir; Johnsen, Espen; Khodabandeloo, Babak et al. (2024). Broadband backscattering by Atlantic herring (Clupea harengus L.) differs when measured from a research vessel vs. a silent uncrewed surface vehicle. (external link)
• Perrichon, Prescilla; Bjelland, Reidun Marie; Durif, Caroline et al. (2023). Early ontogeny of the lesser sandeel (Ammodytes marinus). (external link)
• Anderson, Sean C.; Bacheler, Nate; Barnett, Lewis et al. (2023). WORKSHOP ON UNAVOIDABLE SURVEY EFFORT REDUCTION 2 (WKUSER2). (external link)
• Totland, Atle; Johnsen, Espen (2022). Kayak Drone – a silent acoustic unmanned surface vehicle for marine research. (external link)
• Cresci, Alessandro; Perrichon, Prescilla; Durif, Caroline et al. (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). (external link)
• Vogel, Emma; Biuw, Martin; Blanchet, Marie-Anne et al. (2021). Killer whale movements on the Norwegian shelf are associated with herring density. (external link)
• Kjesbu, Olav Sigurd; Sundby, Svein; Sandø, Anne Britt et al. (2021). Highly mixed impacts of near-future climate change on stock productivity proxies in the North East Atlantic. (external link)
• Breivik, Olav Nikolai; Aanes, Fredrik L; Søvik, Guldborg et al. (2021). Predicting abundance indices in areas without coverage with a latent spatio-temporal Gaussian model. (external link)
• Brautaset, Olav; Waldeland, Anders Ueland; Johnsen, Espen et al. (2020). Acoustic classification in multifrequency echosounder data using deep convolutional neural networks. (external link)
• Lopez-vazquez, Vanesa; Lopez-guede, Jose Manuel; Marini, Simone et al. (2020). Video Image Enhancement and Machine Learning Pipeline for Underwater Animal Detection and Classification at Cabled Observatories. (external link)
• Skaret, Georg; Johansen, Geir Odd; Johnsen, Espen et al. (2020). Diel vertical movements determine spatial interactions between cod, pelagic fish and krill on an Arctic shelf bank. (external link)
• Zhang, Guosong; Forland, Tonje Nesse; Johnsen, Espen et al. (2020). Measurements of underwater noise radiated by commercial ships at a cabled ocean observatory. (external link)
• Ona, Egil; Zhang, Guosong; Pedersen, Geir et al. (2020). In situ calibration of observatory broadband echosounders. (external link)
• Johnsen, Espen; Totland, Atle; Skålevik, Åsmund et al. (2019). StoX: An open source software for marine survey analyses. (external link)
• Engeland, Tom Van; Godø, Olav Rune; Johnsen, Espen et al. (2019). Cabled ocean observatory data reveal food supply mechanisms to a cold-water coral reef. (external link)
• Ødegaard, Lars Alf; Pedersen, Geir; Johnsen, Espen (2019). Underwater noise from wind at the high north LoVe ocean observatory. (external link)
• Ono, Kotaro; Kotwicki, Stan; Dingsør, Gjert Endre et al. (2018). Multispecies acoustic dead-zone correction and bias ratio estimates between acoustic and bottom-trawl data. (external link)
• Johnsen, Espen; Rieucau, Guillaume; Ona, Egil et al. (2017). Collective structures anchor massive schools of lesser sandeel to the seabed, increasing vulnerability to fishery. (external link)
• Korneliussen, Rolf; Heggelund, Yngve; Macaulay, Gavin et al. (2016). Acoustic identification of marine species using a feature library. (external link)
• Axelsen, Bjørn Erik E; Johnsen, Espen (2015). An evaluation of the bottom trawl surveys in the Benguela Current Large Marine Ecosystem. (external link)
• Godø, Olav Rune; Handegard, Nils Olav; Browman, Howard et al. (2014). Marine ecosystem acoustics (MEA): Quantifying processes in the sea at the spatio-temporal scales on which they occur. (external link)
• Hamre, Johannes; Johnsen, Espen; Hamre, Kristin (2014). A new model for simulating growth in fish. (external link)
• Johnsen, Espen; Harbitz, Alf (2013). Small-scale spatial structuring of burrowed sandeels and the catching properties of the dredge. (external link)
• Johnsen, Espen; Kathena, J. (2012). A robust method for generating separate catch time-series for each of the hake species caught in the Namibian trawl fishery. (external link)
• Zaera-Perez, Diana; Johnsen, Espen (2011). Foetal deformities in a smooth-hound shark, Mustelus mustelus, from an oil exploited area in Angola. (external link)
• Johnsen, Espen; Pedersen, Ronald; Ona, Egil (2009). Size-dependent frequency response of sandeel schools. (external link)

Report

• Salthaug, Are; Stenevik, Erling Kåre; Johnsen, Espen (2026). Norsk vårgytende sild overvintringstokt 2025 med F/F Johan Hjort og USV Frida. (external link)
• Huse, Geir; Olsen, Siri Aaserud; Søvik, Guldborg et al. (2026). Ressursoversikt 2026. (external link)
• Kvamme, Cecilie; Holmin, Arne Johannes; Johnsen, Espen et al. (2026). Brislingtokt i Hardangerfjorden, Sognefjorden, Nordfjorden og Trondheimsfjorden i 2025 på F/F Prinsesse Ingrid Alexandra - Toktnummer 2025005015. (external link)
• Orio, Alessandro; Vansteenbrugge, Lies; Abdullah, Muhammad et al. (2025). Working Group on the Assessment of Demersal Stocks in the North Sea and Skagerrak (WGNSSK). (external link)
• Høines, Åge Sigurd; Diaz, Justine Emmanuelle; Heggebakken, Lise et al. (2025). Fangstprøvelotteriet 2024 - Erfaringer og resultater. (external link)
• Salthaug, Are; Johnsen, Espen; Stenevik, Erling Kåre (2025). Norsk vårgytende sild overvintringstokt 2024 med F/F Johan Hjort. (external link)
• Johnsen, Espen; Kvamme, Cecilie (2025). Foreløpig råd for tobisfiske i norsk økonomisk sone i 2025. (external link)
• Johnsen, Espen; Kvamme, Cecilie (2025). Measuring distribution and density of sprat in Norwegian fjords using a kayak drone. (external link)
• Johnsen, Espen; Kvamme, Cecilie (2025). Råd for tobisfiske i norsk økonomisk sone i 2025. (external link)
• Salthaug, Are; Stenevik, Erling Kåre; Johnsen, Espen (2025). Distribution and abundance of Norwegian spring-spawning herring during the spawning season in 2025. (external link)
• Johnsen, Espen; Kvamme, Cecilie (2024). Foreløpig råd for tobisfiske i norsk økonomisk sone i 2024 - Faglig grunnlag. (external link)
• Johnsen, Espen; Pena, Hector; Pedersen, Ronald et al. (2024). Fordeling og mengde av tobis i norsk sone av Nordsjøen i mai 2023 — Tobistokt i Nordsjøen 23. april – 13. mai 2023. (external link)
• Handegard, Nils Olav; Allken, Vaneeda; Holmin, Arne Johannes et al. (2024). Survey report for CRIMAC SFI 2023. (external link)
• Otterå, Håkon Magne; Heggebakken, Lise; Høines, Åge Sigurd et al. (2024). Fangstprøvelotteriet 2023 - erfaringer og resultat. (external link)
• Marquez, Jonatan Fredricson; Meeren, Gro Ingleid van der; Meeren, Terje van der et al. (2024). Liste over forvaltningsrelevante naturenheter - Oppfølgende informasjon til rapporten "Forvaltningsrelevante naturenheter i sjø". (external link)
• Høines, Åge Sigurd; Diaz, Justine Emmanuelle; Heggebakken, Lise et al. (2023). Fangstprøvelotteriet 2021 - erfaringer og resultat. (external link)
• Johnsen, Espen (2023). Foreløpige råd for tobisfiskeriet i norsk økonomisk sone 2023. (external link)
• Arneberg, Per; Husson, Berengere; Siwertsson, Anna et al. (2023). Panel-based Assessment of Ecosystem Condition of the North Sea Shelf Ecosystem - Appendices. (external link)
• Arneberg, Per; Husson, Berengere; Siwertsson, Anna et al. (2023). Panel-based Assessment of Ecosystem Condition of the North Sea Shelf Ecosystem. (external link)
• Søvik, Guldborg; Falkenhaug, Tone; Zimmermann, Fabian et al. (2023). Toktrapport fra økosystemtokt i Vestlandsfjordene — Hydrografi, vannkjemi, reker, krill, bunnfisk, tobis og perifylla. (external link)
• Skaret, Georg; Diaz, Justine Emmanuelle; Heggebakken, Lise et al. (2023). Fangstprøvelotteriet 2022 - erfaringer og resultat. (external link)
• Høines, Åge Sigurd; Johnsen, Espen; Kvamme, Cecilie et al. (2022). Fangstprøvelotteriet 2020 – erfaringer og resultat. (external link)
• Johnsen, Espen (2022). Råd for tobisfiskeriet i norsk sone for 2022 - Tobistokt i Nordsjøen 27. april-12. mai 2022. (external link)
• Handegard, Nils Olav; Pedersen, Geir; Forland, Tonje Nesse et al. (2022). CRIMAC - Annual Report 2021. (external link)
• Ona, Egil; Handegard, Nils Olav; Pedersen, Geir et al. (2021). CRIMAC - Annual Report 2020. (external link)
• Johnsen, Espen; Sørhus, Elin; Jong, Karen de et al. (2021). Kunnskapsstatus for havsil i norsk sone av Nordsjøen. (external link)
• Ona, Egil; Handegard, Nils Olav; Johnsen, Espen et al. (2021). CRIMAC cruise report 2020116. (external link)
• Johannesen, Edda; Wienerroither, Rupert; Mørk, Herdis Langøy et al. (2021). Fish diversity data from the Barents Sea Ecosystem Survey 2004-2019. (external link)
• Olsen, Erik Joel Steinar; Aanes, Sondre; Aldrin, Magne Tommy et al. (2021). Final report for the REDUS project - Reduced Uncertainty in Stock Assessment. (external link)
• Johnsen, Espen; Totland, Atle; Kvamme, Cecilie (2020). Measuring distribution and density of sprat in Årdalsfjorden with a kayak drone - 15-16 August 2020. (external link)
• Johannesen, Edda; Johnsen, Espen; Johansen, Geir Odd et al. (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. (external link)
• Mehl, Sigbjørn; Aglen, Asgeir; Johnsen, Espen et al. (2018). Estimation of acoustic indices with CVs for cod and haddock in the Barents Sea winter survey 1994 – 2017 applying the Sea2Data StoX software.. (external link)
• Mehl, Sigbjørn; Johnsen, Espen; Skålevik, Åsmund et al. (2018). Estimation of acoustic indices with CVs for Northeast Arctic saithe in the Norwegian coastal survey 2003-2017 applying the Sea2Data StoX software.. (external link)
• Mehl, Sigbjørn; Aglen, Asgeir; Johnsen, Espen (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. (external link)
• Tangen, Magnus; Hamre, Johannes; Johnsen, Espen et al. (2016). Tobis ved Vestlandet og i Nordsjøen 1950-1990. (external link)
• Nøttestad, Leif; Johnsen, Espen; Utne, Kjell Rong (2015). Makrellen er en velsignelse for verden og økosystemene. (external link)
• Sunnanå, Knut; Kovalev, Yuri A.; Gjøsæter, Harald et al. (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. (external link)

Academic monograph

• Steingrund, Petur; Anker-Nilssen, Tycho; Bjørnsson, Høskuldur et al. (2025). Advection of zooplankton onto the Nordic shelves and effects on forage fish, demersal fish and seabirds. (external link)
• Steingrund, Petur; Anker-Nilssen, Tycho; Bjørnsson, Høskuldur et al. (2025). Ecosystem based management of sandeels, demersal fish and seabirds in Boreal ecosystems in Northeast Atlantic. (external link)

Academic lecture

• Handegard, Nils Olav; Bildøy, Leif Edvard; Johnsen, Espen (2025). Uncrewed Surface Vehicles and fisheries acoustics: The Norwegian case. (external link)
• Handegard, Nils Olav; Bildøy, Leif Edvard; Jacobsen, Stian et al. (2025). Implementing uncrewed surface vehicles in existing acoustic trawl surveys: data infrastructure, remote operating centre, edge computing, data compression and transfer, data quality monitoring, and automated target classification. (external link)
• Pedersen, Geir; Khodabandeloo, Babak; Johnsen, Espen et al. (2024). Behaviour and platform dependent broadband backscattering by physostome fish (Clupea harengus L.) revisited. (external link)
• Handegard, Nils Olav; Holmin, Arne Johannes; Johnsen, Espen et al. (2024). Testing acoustic data quality and performance on Sounder USV. (external link)
• Tenningen, Maria; Pedersen, Geir; Khodabandeloo, Babak et al. (2024). Identifying size and behavior of Mueller’s Pearlside (Maurolicus muelleri) by combining measured broadband frequency responses with backscattering models and in-trawl observations. (external link)
• Johnsen, Espen; Handegard, Nils Olav; Totland, Atle et al. (2023). Towards a multi-platform armada strategy for ecosystem based marine surveys. (external link)
• Sørhus, Elin; Vikebø, Frode Bendiksen; Johnsen, Espen (2023). Tobis en nøkkelart -hvor sårbar er de ulike livsfasene hos tobis for menneskelig aktivitet i Nordsjøen og Norskekysten?. (external link)
• Sørhus, Elin; Vikebø, Frode Bendiksen; 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. (external link)
• Pedersen, Geir; Handegard, Nils Olav; Johnsen, Espen (2023). Behaviour dependent broadband backscattering by physostomous fish (Clupea harengus L.). (external link)
• Johnsen, Espen (2023). Action plan for implementing USV in acoustic trawl surveys. CRIMAC – Workshop on Fisheries acoustics and Uncrewed Surface Vehicles.. (external link)
• Handegard, Nils Olav; Brautaset, Olav; Choi, Changkyu et al. (2022). Developing and deploying machine learning methods for acoustic data. (external link)
• Handegard, Nils Olav; Forland, Tonje Nesse; Johnsen, Espen et al. (2021). CRIMAC - Center for Research-based Innovation in Marine Acoustic Abundance Estimation and Backscatter Classification. (external link)
• Johnsen, Espen; Totland, Atle; Kubilius, Rokas et al. (2019). Acoustic measurements of herring close to the sea surface. (external link)
• Ødegaard, Lars Alf; Pedersen, Geir; Johnsen, Espen (2019). Underwater noise from wind at the high north LoVe ocean observatory. (external link)
• Lid, Sjur Ringheim; Fotland, Åge; Gjøsæter, Harald et al. (2018). Sea2Data - from acquisition to advice. (external link)
• Skaret, Georg; Fall, Johanna Jennifer Elisabeth; Fauchald, Per et al. (2017). In situ study of the functional response of cod to capelin using broadband acoustics and trawl sampling. (external link)
• Korsbrekke, Knut; Dingsør, Gjert Endre; Johnsen, Espen (2013). Variance and estimates of number of individuals from acoustic surveys. (external link)
• Totland, Atle; Gjøsæter, Harald; Handegard, Nils Olav et al. (2013). "StoX" - an open source approach to survey calculations. (external link)
• Misund, Ole Arve; Bogstad, Bjarte; Haug, tore et al. (2012). Kvoteutsiktene for de viktigste fiskeslagene de neste 5 årene. (external link)

Poster

• Sørhus, Elin; Bjelland, Reidun Marie; Durif, Caroline et al. (2024). Embryos of lesser sandeel (Ammodytes marinus) are robust to crude oil exposure. (external link)
• Handegard, Nils Olav; Algrøy, Tonny; Eliassen, Inge Kristian et al. (2023). Centre for research based innovation in marine acoustic abundance estimation and backscatter classification (CRIMAC). (external link)
• Pedersen, Geir; Handegard, Nils Olav; Khodabandeloo, Babak et al. (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.. (external link)
• Perrichon, Prescilla; Bjelland, Reidun Marie; Durif, Caroline et al. (2022). IMPACT OF CHRONIC OIL POLLUTION ON RECRUITMENT OF PREY SPECIES - KnowSandeel Project. (external link)
• Perrichon, Prescilla; Bjelland, Reidun Marie; Durif, Caroline et al. (2021). Early ontogeny of lesser sandeel (Ammodytes marinus). (external link)
• Handegard, Nils Olav; Gjøsæter, Harald; Johnsen, Espen et al. (2018). Towards seamless integration of data and processing software: data products generated from machine-to-machine interfaces. (external link)

Interview

• Johnsen, Espen; Handegard, Nils Olav; Fagerbakke, Christine (2023). Nytt selvgående forskningsfartøy testes i Hardangerfjorden. (external link)

Masters thesis

• Berge, Daniel; Johnsen, Espen; Tenningen, Maria (2023). Spatiotemporal variation in the growth and size distributions of lesser sandeel (Ammodytes marinus) in the north-eastern North Sea. (external link)
• Stiti, Daniel Jarl Skåtøy; Johnsen, Espen; Kvamme, Cecilie et al. (2022). Spatiotemporal variation in the density distribution of sprat (Sprattus sprattus) in Hardangerfjorden and Sognefjorden. (external link)

Errata

• Lopez-Vazquez, Vanesa; Lopez-Guede, Jose Manuel; Marini, Simone et al. (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). (external link)

Lecture

• Lid, Sjur Ringheim; Fotland, Åge; Gjøsæter, Harald et al. (2016). Sea2Data - from data acquisition to advice. (external link)
• Johnsen, Espen; Ona, Egil; Harbitz, Alf et al. (2015). Increasing the precision in acoustic estimates of patchy distributed fish. (external link)

See a complete overview of publications in Cristin.