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Ole-Kristian Hess-Erga
PhD
Position: Senior Research Scientist, PhD
Phone: +47 979 73 054
Section: Akvakultur
Email: Ole-Kristian.Hess-Erga(at)niva.no
Ole-Kristian Hess-Erga is a microbial ecologist (PhD) from the Norwegian University for Science and Technology (NTNU) and employed as a research scientist at NIVA, Section for Fish Ecology and Aquaculture. Ole-Kristian is specialized in microbial ecology and water treatment, and has been working with the effects of disinfection, decomposition of organic matter, bacterial recolonization, and small-scale aquaculture since 2005. His work has focussed both on intensive aquaculture (biology and technology) and ballast water treatment. Ole-Kristian has additional experience from offshore work and shipping.
Search in NIVA-reports (1958 - )
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Scientific articles and Bookchapters

  1. Höglund, Erik; Fernandes, Paulo; Rojas-Tirado, Paula Andrea; Rundberget, Thomas; Hess-Erga, Ole-Kristian; (2022) Assessing Stress Resilience After Smolt Transportation by Waterborne Cortisol and Feeding Behavior in a Commercial Atlantic Salmon (Salmo salar) Grow-Out Recirculating Aquaculture System. Frontiers in Physiology ISSN 1664-042X. Vol 12 doi: 10.3389/fphys.2021.771951
  2. Lindivat, Mathilde; Bratbak, Gunnar; Larsen, Aud; Hess-Erga, Ole-Kristian; Hoell, Ingunn Alne; (2021) Flow Cytometric Analysis of Bacterial Protein Synthesis: Monitoring Vitality After Water Treatment. Frontiers in Microbiology ISSN 1664-302X. Vol 12 doi: 10.3389/fmicb.2021.772651
  3. Lindivat, Mathilde; Larsen, Aud; Hess-Erga, Ole Kristian; Bratbak, Gunnar; Hoell, Ingunn; (2020) Bioorthogonal Non-canonical Amino Acid Tagging Combined With Flow Cytometry for Determination of Activity in Aquatic Microorganisms. Frontiers in Microbiology ISSN 1664-302X. Vol 11 doi: 10.3389/fmicb.2020.01929
  4. Hess-Erga, Ole-Kristian; Moreno-Andrés, Javier; Enger, Øivind; Vadstein, Olav; (2019) Microorganisms in ballast water: Disinfection, community dynamics, and implications for management. Science of the Total Environment ISSN 0048-9697. Vol 657 s704-716 doi: 10.1016/j.scitotenv.2018.12.004
  5. Peperzak, Louis; Zetsche, Eva-Maria; Gollasch, Stephan; Artigas, Luis Felipe; Bonato, Simon; Créach, Véronique; Vré, Pieter de; Dubelaar, George B.J.; Henneghien, Joël; Hess-Erga, Ole-Kristian; Langelaar, Roland; Larsen, Aud; Maurer, Brian N; Mosselaar, Albert; Reavie, Euan D; Rijkeboer, Machteld; Tobiesen, August; (2018) Comparing flow cytometry and microscopy in the quantification of vital aquatic organisms in ballast water. Journal of Marine Engineering & Technology ISSN 2046-4177. doi: 10.1080/20464177.2018.1525806
  6. Hoell, Ingunn; Olsen, Ranveig Ottøy; Hess-Erga, Ole-Kristian; Thuestad, Gunnar; Larsen, Aud; (2017) Application of flow cytometry in ballast water analysis - biological aspects. Management of Biological Invasions ISSN 1989-8649. Vol 8 No4 s575-588 doi: 10.3391/mbi.2017.8.4.13
  7. Olsen, Ranveig Ottøy; Hess-Erga, Ole-Kristian; Larsen, Aud; Hoffmann, Friederike; Thuestad, Gunnar; Hoell, Ingunn Alne; (2016) Dual staining with CFDA-AM and SYTOX Blue in flow cytometry analysis of UV-irradiated Tetraselmis suecica to evaluate vitality. Aquatic Biology ISSN 1864-7782. Vol 25 s39-52 doi: 10.3354/ab00662
  8. Olsen, Ranveig Ottøy; Hoffmann, Friederike; Hess-Erga, Ole-Kristian; Larsen, Aud; Thuestad, Gunnar; Hoell, Ingunn; (2016) Ultraviolet radiation as a ballast water treatment strategy: Inactivation of phytoplankton measured with flow cytometry. Marine Pollution Bulletin ISSN 0025-326X. Vol 103 No1-2 s270-275 doi: 10.1016/j.marpolbul.2015.12.008
  9. Olsen, Ranveig Ottøy; Hess-Erga, Ole-Kristian; Larsen, Aud; Thuestad, Gunnar; Tobiesen, August E.Dessen; Hoell, Ingunn; (2015) Flow cytometric applicability to evaluate UV inactivation of phytoplankton in marine water samples. Marine Pollution Bulletin ISSN 0025-326X. Vol 96 No1-2 s279-285 doi: 10.1016/j.marpolbul.2015.05.012
  10. Hess-Erga, Ole-Kristian; Blomvågnes-Bakke, Bente; Vadstein, Olav; (2010) Recolonization by heterotrophic bacteria after UV irradiation or ozonation of seawater; a simulation of ballast water treatment. Water Research ISSN 0043-1354. Vol 44 No18 s5439-5449 doi: 10.1016/j.watres.2010.06.059
  11. Hess-Erga, Ole-Kristian; Attramadal, Kari; Vadstein, Olav; (2008) Biotic and abiotic particles protect marine heterotrophic bacteria during UV and ozone disinfection. Aquatic Biology ISSN 1864-7782. Vol 4 No2 s147-154 doi: 10.3354/ab00105
NIVA began to register scientific articles in CRIStin in 2010, reports from 2014.

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