Ole-Kristian Hess-Erga
PhD
Position:
Senior Research Scientist, PhD
Phone:
+47 979 73 054
Section:
Akvakultur
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.
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Scientific articles and Bookchapters
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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.
Reports
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Hess-Erga, Ole-Kristian; Furseth, Kamilla; Dale, Trine; (2022) Søknad, overvåking og kontroll med utslipp fra landbasert akvakultur , Norsk institutt for vannforskning. ISBN 978-82-577-7532-2. No 7796-2022 (34 sider)
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Hess-Erga, Ole-Kristian; Furseth, Kamilla; Dale, Trine; (2022) Søknad, overvåking og kontroll med utslipp fra landbasert akvakultur , Norsk institutt for vannforskning. ISBN 978-82-577-7532-2. No 7796-2022 (34 sider)
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Hess-Erga, Ole-Kristian; Furseth, Kamilla; Dale, Trine; (2022) Søknad, overvåking og kontroll med utslipp fra landbasert akvakultur , Norsk institutt for vannforskning. ISBN 978-82-577-7532-2. No 7796-2022 (34 sider)
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Wennberg, Aina Charlotte; Martins, Samantha Eslava; Furseth, Kamilla; Tobiesen, August E.Dessen; Hess-Erga, Ole-Kristian; (2022) Evaluation of factors influencing disinfection efficacy for aquaculture , Norsk institutt for vannforskning. ISBN 978-82-577-7537-7. No 7801-2022 (32 sider)
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Wennberg, Aina Charlotte; Martins, Samantha Eslava; Furseth, Kamilla; Tobiesen, August E.Dessen; Hess-Erga, Ole-Kristian; (2022) Evaluation of factors influencing disinfection efficacy for aquaculture , Norsk institutt for vannforskning. ISBN 978-82-577-7537-7. No 7801-2022 (32 sider)
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Kaste, Øyvind; Dahl, Einar; Gaeta, Federico Håland; Hess-Erga, Ole-Kristian; Johnsen, Kathrine Ivsett; Kildahl, Henriette Othilie Bøe; Steen, Henning; Albretsen, Jon; (2020) Mulighetskartlegging for kystbaserte næringer i Østfold , Norsk institutt for vannforskning. ISBN 978-82-577-7252-9. No 7517 (100 sider)
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Hess-Erga, Ole-Kristian; Åtland, Åse; Kvam, Olaug Vetti; Berland, Magne; Hansen, Espen; Melingen, Geir Olav; (2018) Etablering av et demonstrasjonsanlegg for integrert produksjon av fisk og planter på Akvariet i Bergen , Norsk institutt for vannforskning. ISBN 978-82-577-6962-8. No 7227 (25 sider)
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Åtland, Åse; Hess-Erga, Ole-Kristian; Rosseland, Bjørn Olav; Johannessen, Torill Vik; (2015) Vannkvalitet i marin yngelproduksjon , Norsk institutt for vannforskning. ISBN 978-82-577-6615-3. No 6880 (12 sider)
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Hess-Erga, Ole-Kristian; Johannessen, Torill Vik; Åtland, Åse; (2015) Overvåkingsprogram og kompetansehevingstiltak knyttet til vannkvalitet og fiskehelse i marine yngel- og settefiskanlegg (MarinVest) , Norsk institutt for vannforskning. ISBN 978-82-577-6517-0. No 6782 (66 sider)
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Hess-Erga, Ole-Kristian; Kristensen, Torstein; Eliassen, Robert; Iversen, Martin Haugmo; (2014) Sluttrapport - Artec pilot Dokumentasjon av vannkvalitet og fiskefysiologi i et pilotanlegg for resirkulering (Artec Pilot) og et gjennomstrømmingsanlegg , Norsk institutt for vannforskning. ISBN 978-82-577-6016-8. No 6281 (34 sider)
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Hess-Erga, Ole-Kristian (2010) Disinfection of seawater and implications for ballast water treatment , Institutt for bioteknologi, NTNU. ISBN 978-82-471-2043-9. (207 sider)
NIVA began to register scientific articles in CRIStin in 2010, reports from 2014.
Other
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Lygre, Endre; Da Silva Gomes, Ana Cristina; Hess-Erga, Ole-Kristian; Norberg, Birgitta; Nilsson, Jonatan; Rønnestad, Ivar; (2022) Exploring central and peripheral appetite-regulating peptides in the brain and gastrointestinal tract in grow-out Atlantic halibut , 30th CECE $ 9th ISFE Joint Conference of the European Society for Comparative Endocrinology and of the International Society for Fish Endocrinology 05.09.2022
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Lygre, Endre; Gomes, Ana S.; Hess-Erga, Ole-Kristian; Norberg, Birgitta; Nilsson, Jonatan; Perrichon, Prescilla; Rønnestad, Ivar; (2021) Gastric evacuation in three sizes of grow-out Atlantic halibut Hippoglossus hippoglossus fed different pellets sizes , Aquaculture Europe 2021 04.10.2021
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Rosseland, Bjørn Olav; Hess-Erga, Ole-Kristian; (2018) Generell resirkulering (RAS) Problemstillinger og vannkvalitet , Seminar 24.04.2018
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Lindivat, Mathilde; Larsen, Aud; Bratbak, Gunnar; Hess-Erga, Ole-Kristian; Hoell, Ingunn; (2018) Bacterial Viability and Vitality: Application of Click Chemistry in Flow Cytometry , 3rd International Caparica Conference on Chromogenic and Emissive Materials, IC3EM 2018 03.09.2018
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Rosseland, Bjørn Olav; Hess-Erga, Ole-Kristian; (2015) Generell resirkulering (RAS). Problemstillinger og vannkvalitet , Fagdag Franzefoss Miljøkalk 03.03.2015
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Rosseland, Bjørn Olav; Hess-Erga, Ole-Kristian; (2013) Generell resirkulering (RAS) Problemstillinger og vannkvalitet , Skretting Aqua Training Settefisk 02.11.2013
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Wolff, Silje Aase; Kittang, Ann-Iren; Mehli, Lisbeth; Karoliussen, Irene; Hess-Erga, Ole-Kristian; Schiefloe, Mona; Mikkelsen, Øyvind; Hancock, Karl Eric; Larsen, Gunnar; (2013) New knowledge and Technologies for Closed Cycle Hydroponics , GroSci 2013 17.06.2013
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Rosseland, Bjørn Olav; Terjesen, Bendik Fyhn; Hess-Erga, Ole-Kristian; (2013) Konflikten mellom villaks og fiskeoppdrett – kan den løses gjennom endret produksjonsform? , Skretting Aqua Training Settefisk 02.11.2013
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Rosseland, Bjørn Olav; Hess-Erga, Ole-Kristian; (2012) Recirculation and water quality , NOVARTIS and Meridian Salmon Group seminar on water quality and fish welfare 14.06.2012
NIVA began to register scientific articles in CRIStin in 2010, reports from 2014.