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Universitetet i Bergen
Espen Johnsens bilde

Espen Johnsen

Professor
Institutt for biovitenskap (BIO)
  • E-postespen.johnsen@uib.no
  • Telefon+47 55 58 44 00
  • Besøksadresse
    Thormøhlens gate 53 A/B
    5006 Bergen
  • Postadresse
    Postboks 7803
    5020 Bergen
Vitenskapelig artikkel
  • Vis forfatter(e) (2023). WORKSHOP ON UNAVOIDABLE SURVEY EFFORT REDUCTION 2 (WKUSER2). ICES Scientific Reports.
  • Vis forfatter(e) (2023). Early ontogeny of the lesser sandeel (Ammodytes marinus). Developmental Dynamics. 1280-1291.
  • Vis forfatter(e) (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). Marine Environmental Research.
  • Vis forfatter(e) (2022). Kayak Drone – a silent acoustic unmanned surface vehicle for marine research. Frontiers in Marine Science. 13 sider.
  • Vis forfatter(e) (2021). Predicting abundance indices in areas without coverage with a latent spatio-temporal Gaussian model. ICES Journal of Marine Science. 2031-2042.
  • Vis forfatter(e) (2021). Killer whale movements on the Norwegian shelf are associated with herring density. Marine Ecology Progress Series.
  • Vis forfatter(e) (2021). Highly mixed impacts of near-future climate change on stock productivity proxies in the North East Atlantic. Fish and Fisheries. 601-615.
  • Vis forfatter(e) (2020). Video Image Enhancement and Machine Learning Pipeline for Underwater Animal Detection and Classification at Cabled Observatories. Sensors. 1-25.
  • Vis forfatter(e) (2020). Measurements of underwater noise radiated by commercial ships at a cabled ocean observatory. Marine Pollution Bulletin. 6 sider.
  • Vis forfatter(e) (2020). In situ calibration of observatory broadband echosounders. ICES Journal of Marine Science. 2954-2959.
  • Vis forfatter(e) (2020). Diel vertical movements determine spatial interactions between cod, pelagic fish and krill on an Arctic shelf bank. Marine Ecology Progress Series. 13-23.
  • Vis forfatter(e) (2020). Acoustic classification in multifrequency echosounder data using deep convolutional neural networks. ICES Journal of Marine Science. 1391-1400.
  • Vis forfatter(e) (2019). Underwater noise from wind at the high north LoVe ocean observatory. Underwater Acoustics Conference & Exhibition (UACE). 359-366.
  • Vis forfatter(e) (2019). StoX: An open source software for marine survey analyses. Methods in Ecology and Evolution. 1523-1528.
  • Vis forfatter(e) (2019). Cabled ocean observatory data reveal food supply mechanisms to a cold-water coral reef. Progress in Oceanography. 51-64.
  • Vis forfatter(e) (2018). Multispecies acoustic dead-zone correction and bias ratio estimates between acoustic and bottom-trawl data. ICES Journal of Marine Science. 361-373.
  • Vis forfatter(e) (2017). Collective structures anchor massive schools of lesser sandeel to the seabed, increasing vulnerability to fishery. Marine Ecology Progress Series. 229-236.
  • Vis forfatter(e) (2016). Acoustic identification of marine species using a feature library. Methods in oceanography. 187-205.
  • Vis forfatter(e) (2015). An evaluation of the bottom trawl surveys in the Benguela Current Large Marine Ecosystem. Fisheries Oceanography. 74-87.
  • Vis forfatter(e) (2014). Marine ecosystem acoustics (MEA): Quantifying processes in the sea at the spatio-temporal scales on which they occur. ICES Journal of Marine Science. 2357-2369.
  • Vis forfatter(e) (2014). A new model for simulating growth in fish. PeerJ.
  • Vis forfatter(e) (2013). Small-scale spatial structuring of burrowed sandeels and the catching properties of the dredge. ICES Journal of Marine Science. 379-386.
  • Vis forfatter(e) (2012). A robust method for generating separate catch time-series for each of the hake species caught in the Namibian trawl fishery. South African Journal of Marine Science. 43-53.
  • Vis forfatter(e) (2011). Foetal deformities in a smooth-hound shark, Mustelus mustelus, from an oil exploited area in Angola. Cybium. 231-236.
  • Vis forfatter(e) (2009). Size-dependent frequency response of sandeel schools. ICES Journal of Marine Science. 1100-1105.
Rapport
  • Vis forfatter(e) (2023). Toktrapport fra økosystemtokt i Vestlandsfjordene — Hydrografi, vannkjemi, reker, krill, bunnfisk, tobis og perifylla. 2023 - 11. 2023 - 11. .
  • Vis forfatter(e) (2023). Panel-based Assessment of Ecosystem Condition of the North Sea Shelf Ecosystem - Appendices. 2023 -18. 2023 -18. .
  • Vis forfatter(e) (2023). Panel-based Assessment of Ecosystem Condition of the North Sea Shelf Ecosystem. 2023 - 17. 2023 - 17. .
  • Vis forfatter(e) (2023). Foreløpige råd for tobisfiskeriet i norsk økonomisk sone 2023. 2023 - 12. 2023 - 12. .
  • Vis forfatter(e) (2023). Fangstprøvelotteriet 2021 - erfaringer og resultat. 2023 - 8. 2023 - 8. .
  • Vis forfatter(e) (2022). Råd for tobisfiskeriet i norsk sone for 2022 - Tobistokt i Nordsjøen 27. april-12. mai 2022. 2022 - 6. 2022 - 6. .
  • Vis forfatter(e) (2022). Fangstprøvelotteriet 2020 – erfaringer og resultat. 2022 - 4. 2022 - 4. .
  • Vis forfatter(e) (2022). CRIMAC - Annual Report 2021. .
  • Vis forfatter(e) (2021). Kunnskapsstatus for havsil i norsk sone av Nordsjøen. 2021 - 33. 2021 - 33. .
  • Vis forfatter(e) (2021). Fish diversity data from the Barents Sea Ecosystem Survey 2004-2019. 2021 - 15. 2021 - 15. .
  • Vis forfatter(e) (2021). Final report for the REDUS project - Reduced Uncertainty in Stock Assessment. 2021 - 16. 2021 - 16. .
  • Vis forfatter(e) (2021). CRIMAC cruise report 2020116. .
  • Vis forfatter(e) (2021). CRIMAC - Annual Report 2020. .
  • Vis forfatter(e) (2020). Measuring distribution and density of sprat in Årdalsfjorden with a kayak drone - 15-16 August 2020. 2020 - 28. 2020 - 28. .
  • Vis forfatter(e) (2019). StoX brukt på torsk og hyse data fra økosystemtoktet i Barentshavet - Lengde, vekt og mengdeindekser fra bunntrål 2004-2017 . 2019 - 6. 2019 - 6. .
  • Vis forfatter(e) (2018). Estimation of acoustic indices with CVs for cod and haddock in the Barents Sea winter survey 1994 – 2017 applying the Sea2Data StoX software. 5-2018. 5-2018. .
  • Vis forfatter(e) (2018). Estimation of acoustic indices with CVs for Northeast Arctic saithe in the Norwegian coastal survey 2003-2017 applying the Sea2Data StoX software. 1-2018. 1-2018. .
  • Vis forfatter(e) (2016). Tobis ved Vestlandet og i Nordsjøen 1950-1990. Nr. 5/2016. Nr. 5/2016. .
  • Vis forfatter(e) (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. 2016/10. 2016/10. .
  • Vis forfatter(e) (2015). Makrellen er en velsignelse for verden og økosystemene. .
  • Vis forfatter(e) (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. 3/2014. 3/2014. .
Faglig foredrag
  • Vis forfatter(e) (2016). Sea2Data - from data acquisition to advice.
  • Vis forfatter(e) (2015). Increasing the precision in acoustic estimates of patchy distributed fish.
Vitenskapelig foredrag
  • Vis forfatter(e) (2023). Towards a multi-platform armada strategy for ecosystem based marine surveys.
  • Vis forfatter(e) (2023). Behaviour dependent broadband backscattering by physostomous fish (Clupea harengus L.).
  • Vis forfatter(e) (2022). Developing and deploying machine learning methods for acoustic data.
  • Vis forfatter(e) (2021). CRIMAC - Center for Research-based Innovation in Marine Acoustic Abundance Estimation and Backscatter Classification.
  • Vis forfatter(e) (2019). Underwater noise from wind at the high north LoVe ocean observatory.
  • Vis forfatter(e) (2019). Acoustic measurements of herring close to the sea surface.
  • Vis forfatter(e) (2018). Sea2Data - from acquisition to advice.
  • Vis forfatter(e) (2017). In situ study of the functional response of cod to capelin using broadband acoustics and trawl sampling.
  • Vis forfatter(e) (2013). Variance and estimates of number of individuals from acoustic surveys.
  • Vis forfatter(e) (2013). "StoX" - an open source approach to survey calculations.
  • Vis forfatter(e) (2012). Kvoteutsiktene for de viktigste fiskeslagene de neste 5 årene.
Mastergradsoppgave
  • Vis forfatter(e) (2023). Spatiotemporal variation in the growth and size distributions of lesser sandeel (Ammodytes marinus) in the north-eastern North Sea.
  • Vis forfatter(e) (2022). Spatiotemporal Variation in the Density Distribution of Sprat (Sprattus Sprattus) in Hardangerfjorden and Sognefjorden.
Intervju
  • Vis forfatter(e) (2023). Nytt selvgående forskningsfartøy testes i Hardangerfjorden.
Sammendrag/abstract
  • Vis forfatter(e) (2020). Long term acoustic time series of the Lofoten–Vesterålen ocean observatory. Journal of the Acoustical Society of America.
  • Vis forfatter(e) (2019). The Lofoten-Vesterålen Ocean Observatory—A cabled infrastructure for operational acoustical oceanography. Journal of the Acoustical Society of America.
Poster
  • Vis forfatter(e) (2023). Centre for research based innovation in marine acoustic abundance estimation and backscatter classification (CRIMAC).
  • Vis forfatter(e) (2022). IMPACT OF CHRONIC OIL POLLUTION ON RECRUITMENT OF PREY SPECIES - KnowSandeel Project.
  • Vis forfatter(e) (2018). Towards seamless integration of data and processing software: data products generated from machine-to-machine interfaces.
Errata
  • Vis forfatter(e) (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). Sensors.

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