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University of Bergen
Espen Johnsen's picture

Espen Johnsen

Associate Professor
Department of Biological Sciences (BIO)
  • E-mailEspen.Johnsen@uib.no
  • Phone+47 55 58 44 00
  • Visitor Address
    Thormølens gate 53 A/B
    5006 Bergen
  • Postal Address
    Postboks 7803
    5020 Bergen
Academic article
  • Show author(s) (2021). Predicting abundance indices in areas without coverage with a latent spatio-temporal Gaussian model. ICES Journal of Marine Science. 2031-2042.
  • Show author(s) (2021). Killer whale movements on the Norwegian shelf are associated with herring density. MEPS. 217-231.
  • Show author(s) (2021). Highly mixed impacts of near-future climate change on stock productivity proxies in the North East Atlantic. Fish and Fisheries. 15 pages.
  • Show author(s) (2020). Video Image Enhancement and Machine Learning Pipeline for Underwater Animal Detection and Classification at Cabled Observatories. Sensors. 1-25.
  • Show author(s) (2020). Measurements of underwater noise radiated by commercial ships at a cabled ocean observatory. Marine Pollution Bulletin. 6 pages.
  • Show author(s) (2020). In situ calibration of observatory broadband echosounders. ICES Journal of Marine Science. 2954-2959.
  • Show author(s) (2020). Diel vertical movements determine spatial interactions between cod, pelagic fish and krill on an Arctic shelf bank. Marine Ecology Progress Series. 13-23.
  • Show author(s) (2020). Acoustic classification in multifrequency echosounder data using deep convolutional neural networks. ICES Journal of Marine Science. 1391-1400.
  • Show author(s) (2019). Underwater noise from wind at the high north LoVe ocean observatory. Underwater Acoustics Conference & Exhibition (UACE). 359-366.
  • Show author(s) (2019). StoX: An open source software for marine survey analyses. Methods in Ecology and Evolution. 1523-1528.
  • Show author(s) (2019). Cabled ocean observatory data reveal food supply mechanisms to a cold-water coral reef. Progress in Oceanography. 51-64.
  • Show author(s) (2018). Multispecies acoustic dead-zone correction and bias ratio estimates between acoustic and bottom-trawl data. ICES Journal of Marine Science. 361-373.
  • Show author(s) (2017). Collective structures anchor massive schools of lesser sandeel to the seabed, increasing vulnerability to fishery. Marine Ecology Progress Series. 229-236.
  • Show author(s) (2016). Acoustic identification of marine species using a feature library. Methods in oceanography. 187-205.
  • Show author(s) (2015). An evaluation of the bottom trawl surveys in the Benguela Current Large Marine Ecosystem. Fisheries Oceanography. 74-87.
  • Show author(s) (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.
  • Show author(s) (2014). A new model for simulating growth in fish. PeerJ.
  • Show author(s) (2013). Small-scale spatial structuring of burrowed sandeels and the catching properties of the dredge. ICES Journal of Marine Science. 379-386.
  • Show author(s) (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.
  • Show author(s) (2011). Foetal deformities in a smooth-hound shark, Mustelus mustelus, from an oil exploited area in Angola. Cybium. 231-236.
  • Show author(s) (2009). Size-dependent frequency response of sandeel schools. ICES Journal of Marine Science. 1100-1105.
Report
  • Show author(s) (2022). Råd for tobisfiskeriet i norsk sone for 2022 - Tobistokt i Nordsjøen 27. april-12. mai 2022. 2022 - 6. 2022 - 6. .
  • Show author(s) (2022). Fangstprøvelotteriet 2020 – erfaringer og resultat. 2022 - 4. 2022 - 4. .
  • Show author(s) (2021). Kunnskapsstatus for havsil i norsk sone av Nordsjøen. 2021 - 33. 2021 - 33. .
  • Show author(s) (2021). Fish diversity data from the Barents Sea Ecosystem Survey 2004-2019. 2021 - 15. 2021 - 15. .
  • Show author(s) (2021). Final report for the REDUS project - Reduced Uncertainty in Stock Assessment. 2021 - 16. 2021 - 16. .
  • Show author(s) (2021). CRIMAC cruise report 2020116. .
  • Show author(s) (2021). CRIMAC - Annual Report 2020. .
  • Show author(s) (2020). Measuring distribution and density of sprat in Årdalsfjorden with a kayak drone - 15-16 August 2020. 2020 - 28. 2020 - 28. .
  • Show author(s) (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. 2019 - 6. 2019 - 6. .
  • Show author(s) (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. .
  • Show author(s) (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. .
  • Show author(s) (2016). Tobis ved Vestlandet og i Nordsjøen 1950-1990. Nr. 5/2016. Nr. 5/2016. .
  • Show author(s) (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. .
  • Show author(s) (2015). Makrellen er en velsignelse for verden og økosystemene. .
  • Show author(s) (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. .
Lecture
  • Show author(s) (2016). Sea2Data - from data acquisition to advice.
  • Show author(s) (2015). Increasing the precision in acoustic estimates of patchy distributed fish.
Academic lecture
  • Show author(s) (2021). CRIMAC - Center for Research-based Innovation in Marine Acoustic Abundance Estimation and Backscatter Classification.
  • Show author(s) (2019). Underwater noise from wind at the high north LoVe ocean observatory.
  • Show author(s) (2019). Acoustic measurements of herring close to the sea surface.
  • Show author(s) (2018). Sea2Data - from acquisition to advice.
  • Show author(s) (2017). In situ study of the functional response of cod to capelin using broadband acoustics and trawl sampling.
  • Show author(s) (2013). Variance and estimates of number of individuals from acoustic surveys.
  • Show author(s) (2013). "StoX" - an open source approach to survey calculations.
  • Show author(s) (2012). Kvoteutsiktene for de viktigste fiskeslagene de neste 5 årene.
Abstract
  • Show author(s) (2020). Long term acoustic time series of the Lofoten–Vesterålen ocean observatory. Journal of the Acoustical Society of America.
  • Show author(s) (2019). The Lofoten-Vesterålen Ocean Observatory—A cabled infrastructure for operational acoustical oceanography. Journal of the Acoustical Society of America.
Poster
  • Show author(s) (2022). IMPACT OF CHRONIC OIL POLLUTION ON RECRUITMENT OF PREY SPECIES - KnowSandeel Project.
  • Show author(s) (2018). Towards seamless integration of data and processing software: data products generated from machine-to-machine interfaces.
Article in business/trade/industry journal
  • Show author(s) (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.

More information in national current research information system (CRIStin)