Nils Olav Handegard

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Telephone: 95854057
Department: Økosystemakustikk

Arbeider med

Hovudinteressa mi er korleis ein kan nytta ulike akustiske sensorar til å observera marine organismar. Eg er spesielt interessert i korleis ein kan observera effektar av menneskeleg påverknad på fiskeåtferd og struktur og kollektiv åtferd i store fiskestimar. Eg er og interessert i storskala observasjonssystem og data prosessering generelt. Eg er den norske representanten i ICES sin vitskapskomité.

Curriculum Vitae


2001-2004 dr Scient student (Anvendt matematikk), Havforskningsinstituttet

1997-2000 Cand. Scient (Anvendt matematikk), Universitet i Bergen

1993-1996 Høgskuleingeniør (Maskin), Høgskulen i Sør Trøndelag


2004-present Forskar, Observasjonsmetodikk, Havforskingsinstiuttet

2010 (January-July) Gjesteforskar, Department of Ecology and Evolutionary Biology, Princeton University, NJ, US

2007 (October-December) Fungerande faggruppeleiar for “Observasjonsmetodikk”

2005-2006 Gjesteforskar, School of Oceanography, University of Washington, WA, US

2005-2006 Gjesteforskar, Alaska Fisheries Science Center, NOAA, Seattle, WA, US

2001 IIASA Young Scientists Summer Program, Vienna, Austria

2000 Forskingsassistent, Nansen environmental and remote sencing center


Co-author on the paper that won the best presentation at the 2010 ICES Annual Science Conference: Lehodey, P. et al. (2010). “Towards Operational Management Of Pelagic Ecosystems”, ICES CM 2010/A:04

Beste artikkel frå Havforskingsinstituttet i 2007: Ona, Egil and Godø, Olav Rune and Handegard, Nils Olav and Hjellvik, Vidar and Patel, Ruben and Pedersen, Geir (2007). "Silent research vessels are not quiet", J. Acoust. Soc. Am, Vol 121, JASA Express letters online

Beste artikkel på 2004 ICES Annual Science Conference: Handegard, N.O. and Tjøstheim, D. "The effective swept volume of a bottom trawl", ICES CM 2004/R:07, ICES Annual Science conference, Vigo Sep 2004.


Member of ICES Science Committee (2012-2015)

Chair of the ICES SCICOM steering group on Ecosystem Surveys, Science and Technology (2012-2015)

Chair of the ICES Working Group on Fisheries Acoustics Science and Technology 2010-2013

Chair of the “MAAS group” in the Cliotop programme

Member of the Acoustical Society of America


Publikasjonar (under arbeid eller fagfellevurdering)

[34] Nils Olav Handegard, Ole Folkedal, Endre Grimsbø, Alf Harbitz, Rokas Kubilius, Terje Torkelsen. Can a profiling split beam echosounder be used to assess fish abundance in commercial net pens? In prep.

[33] Ingegjerd Opstad; Browman, Howard; Skiftesvik, Anne Berit; Dalen, John; Handegard, Nils Olav; Eichner, Christiane; Ketil Malde; Karlsen, Ørjan; and Fields, David. Effects of Seismic Air-gun blasts on the copepod Calanus finmarchicus on survival, behaviour, histology and gene expression. In prep.

[32] Maarja Kruusmaa, Guillaume Rieucau, José Carlos Castillo Montoya, Riho Markna, Nils Olav Handegard. Collective responses of a large mackerel school depend on the size and speed of a robotic fish but not on tail motion. Submitted.

[31] Ressler, Dalpadado, Macaulay, Handegard, Skern-Mauritzen. Barents Sea acoustic euphausiid index paper. accepted with revisions, Marine Ecology progress Series.

Publications (publisert eller "in press")

[30] Mette Skern-Mauritzen, Gjert E. Dingsør, Nils Olav Handegard, Geir Ottersen, Geir Huse, Nils Chr. Stenseth, Olav Sigurd Kjesbu (2015). Few signs of ecosystem processes in fisheries management, in press, Fish and Fisheries. doi: 10.1111/faf.12111

[29] Nils Olav Handegard, Alex De Robertis, Gavin Macaulay, Guillaume Rieucau (2015). Herring collective response to vessel noise playbacks. In press, Canadian Journal of  Fisheries & Aquatic Sciences. doi:10.1139/cjfas-2014-0257

[28] G. Rieucau, A. De Robertis, K. M. Boswell and N. O. Handegard. (2014) School density affects the strength of collective avoidance responses in wild-caught Atlantic herring (Clupea harengus): a simulated-predator encounter experiment, Journal of Fish Biology, pp 1650-64. doi:10.1111/jfb.12520

[27] Rieucau Guillaume, Anders Fernö, Christos C. Ioannou, Nils Olav Handegard (2014). Towards of a firmer explanation of large shoal formation, maintenance and collective reactions in marine fish, Reviews in Fish Biology and Fisheries. doi:10.1007/s11160-014-9367-5

[26] Godø, O.R., Handegard, NO, Browman, H., Macaulay, G., Kaartvedt, S., Giske, K., Ona, E., Huse, G., Johnsen, E. Marine Ecosystem Acoustics (MEA) – observing productivity-determining processes in the sea at the spatiotemporal scales on which they occur (2014). ICES Journal of Marine Science. 71 (8) :2357-2369. doi:10.1093/icesjms/fsu116

[25] Rieucau Guillaume, Kevin M. Boswell, Alex De Robertis, Gavin J Macaulay and Nils Olav Handegard. (2014) Experimental evidence of threat-sensitive collective antipredator responses in schooling herring (Clupea harengus), Plos One, 10.1371/journal.pone.0086726.

[24] Blanchard Anne, Kjellrun Hiis Hauge, Gisle Andersen, Matthias Kaiser, Jan Helge Fosså, Bjørn Einar Grøsvik, Nils Olav Handegard, Sonnich Meier, Erik Olsen, Frode Vikebø (2014). Harmful routines? Uncertainty in science and conflicting views on routine petroleum operations in Norway, Marine Policy, 43:313-320,

[23] Hector Peña, Nils Olav Handegard and Egil Ona (2013). Feeding herring do not react to seismic shooting, ICES Journal of Marine Science. 70 (6): 1174-1180. doi:10.1093/icesjms/fst079

[22] Handegard, N.O.; Tronstad, T.V. & Hovem, J. (2013) Noise dose estimation for fish from seismic shooting: a comparison of two cases. Canadian Journal of  Fisheries & Aquatic Sciences 70(9): 1271-1277, doi:10.1139/cjfas-2012-0465

[21] Handegard, N.O. et al. (2013) Towards an acoustic-based coupled observation and modelling system for monitoring and predicting ecosystem dynamics of the open ocean, Fish and Fisheries 14(4): 605-615, doi:10.1111/j.1467-2979.2012.00480.x

[20] Robertis, Alex De, and Nils Olav Handegard. (2013) “Fish Avoidance of Research Vessels and the Efficacy of Noise-reduced Vessels: a Review.” ICES Journal of Marine Science 70, no. 1: 34–45. doi:10.1093/icesjms/fss155.

[19] Holmin, Arne Johannes, Nils Olav Handegard, Rolf J. Korneliussen, and Dag Tjostheim. (2012) Simulations of Multi-beam Sonar Echos from Schooling Individual Fish in a Quiet Environment. The Journal of the Acoustical Society of America 132, no. 6: 3720–3734. doi:10.1121/1.4763981.

[18] Handegard, N. O.; Boswell, K.; LeBlanc, S.;Tjostheim, D. & Couzin, I.D. (2012) Interactions between group hunting predators and schooling prey in a natural marine environment, Current Biology 22, no. 13: 1213–1217. See dispatch by Graeme Ruxton and feature by Michael Gross.

[17] Doksæter, L.; Handegard, N. O.; Kvadsheim, P. H.; Nordlund, N.; Lam, F.-P. A. & Ainslie, M. A. (2012) Impact of naval sonar signals on the behaviour of herring (Clupea harengus) and accumulated effect at the population level, ICES Journal of Marine Science, Volume 69(6): 1078–1085, doi: 10.1093/icesjms/fss080

[16] Bazazi, S., Pfennig, K.S., Handegard, N.O. & Couzin, I.D. (2012) Collective vortex formation and foraging in polyphenic spadefoot toad tadpoles. Behavioral Ecology and Sociobiology: Volume 66, Issue 6, Page 879-889, doi: 10.1007/s00265-012-1336-1

[15] Doksæter, L.; Handegard, N. O.; Godø, O. R.; Kvadsheim, P. H. & Nordlund, N. (2012) Behavioral responses of captive herring to naval sonar signals (1-1.6 kHz) of a throughout a yearly cycle, J. Acoust. Soc. Am., Volume 131, Issue 2, pp. 1632-1642

[14] Handegard, N.O. and Tjøstheim, D. (2009). "The sampling volume of trawl and acoustics: estimating availability probabilities from observations of tracked individual fish", Canadian Journal of Fisheries & Aquatic Sciences. Canadian Journal of Fisheries & Aquatic Sciences, 2009, 66, 425-438.

[13] Handegard, N.O., Pedersen, G. and Brix, O. (2009). "Estimating Tail-beat Frequency using split-beam echosounders", ICES J. Mar. Sci. (SEAFACTS conference), Vol. 66, 1252-1258.

[12] Pedersen, G., Handegard, N.O., Ona, E. (2009). "Horizontal target strength of herring, resolved in incident angles using split beam tracking", ICES J. Mar. Sci. (SEAFACTS conference), Vol. 66, 1191-1196.

[11] Doksæter L., Godø, O.R, Handegard, N.O., Kvadsheim, P. H., Lam, F. P., Donovan, C and Miller, P.J.O. (2009). "Herring (Clupea harengus) behavioural responses to sonar signals (1-2  and 6-7 kHz) and killer whale feeding sounds", J. Acoust. Soc. Am., Vol. 125, No. 1, pp. 554–564.

[10] Hjellvik, V., Handegard, N.O. and Ona, E. (2008). "Correcting for vessel avoidance in acoustic abundance estimates for herring using a generalized linear model", ICES J. Mar. Sci., Vol. 65, 1036 - 1045

[9] Handegard, N. O. and Williams, K. (2008). "Automated tracking of fish in trawls using the DIDSON (dual frequency identification sonar)", ICES J. Mar. Sci., Vol. 65, pp 636-644

[8] Handegard, Nils Olav (2007). "Observing individual fish behavior in fish aggregations: Tracking in dense aggregations", J. Acoust. Soc. Am, Vol 122(1), 177–187

[7] Ona, Egil and Godø, Olav Rune and Handegard, Nils Olav and Hjellvik, Vidar and Patel, Ruben and Pedersen, Geir (2007). "Silent research vessels are not quiet", J. Acoust. Soc. Am, Vol 121, JASA Express letters online. This paper won the best paper award at the Institute of Marine Research in 2007.

[6] Georg Skaret, Aril Slotte, Nils Olav Handegard, Bjørn Erik Axelsen and Roar Jørgensen (2006). "Pre-spawning herring in a protected area showed only moderate reaction to a surveying vessel", Fisheries Research, Vol 78, pp 359-367

[5] Handegard, Nils Olav, Ruben Patel and Vidar Hjellvik (2005). "Tracking individual fish from a moving platform using a split-beam transducer", J. Acoust. Soc. Am., Vol 118(4), pp 2210-2223

[4] Handegard, Nils Olav and Dag Tjøstheim (2005). "When fish meets a trawling vessel: examining the behaviour of gadoids using a free floating buoy and acoustic split-beam tracking", Canadian Journal of Fisheries & Aquatic Sciences, Vol 62, pp 2409-2422

[3] Roar Jørgensen, Nils Olav Handegard, Harald Gjøsæter, and Arill Slotte (2004). "Possible vessel avoidance behaviour of capelin in a feeding area and on a spawning ground", Fisheries Research, Vol 69, pp 251-261

[2] Ruben Patel, Nils Olav Handegard, and Olav Rune Godø (2004)."Behaviour of herring (Clupea harengus L.) towards an approaching autonomous underwater vehicle", ICES Journal of Marine Science, Vol. 61, pp 1044-1049

[1] Handegard, Nils Olav, Kathrine Michalsen and Dag Tjøstheim (2003). "Avoidance behaviour in cod (Gadus morhua) to a bottom-trawling vessel", Aquatic Living Resources, Vol 16(3), pp 265-270

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