Nils Olav Handegard

HI-041905.jpg
Forsker
Telefon: 95854057
Avdeling: Økosystemakustikk

Arbeidsområde

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

Utdanning

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

Arbeidserfaring

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

Utmerkinger

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.

Verv

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

Fulltekstarkiv

http://brage.bibsys.no/imr/simple-search?query=%28%28author%3Ahandegard%29%29&rpp=10&sort_by=2&order=DESC&etal=0&submit_search=Oppdater

Publikasjoner

Faglige foredrag

2019

The COGMAR project

Arnt Børre Salberg, Line Eikvil, Ketil Malde, Nils Olav Handegard
2019

Machine Learning

Nils Olav Handegard, William Michaels
2019

The IMR deep vision pipeline for the Herring survey

Handegard, Nils Olav
2019

Automated acoustic data processing with deep learning

Olav Brautaset, Nils Olav Handegard
2019

Using a CNN trained on synthetic data for fish species identification

Vaneeda Allken, Nils Olav Handegard, Shale Rosen, Ketil Malde
2019

Using a CNN trained on synthetic data for fish species identification

Vaneeda Allken, Nils Olav Handegard, Shale Rosen, Ketil Malde
2018

Challenges and lessons learned in fisheries advice work, and the complex interplay between science, method development and people management

Geir Huse, Harald Gjøsæter, Nils Olav Handegard, Erik Joel Steinar Olsen
2018

Drowning in data: Can deep learning approaches be the solution?

Nils Olav Handegard, Vaneeda Allken, Ketil Malde
2015

Lyd i havet

Handegard, Nils Olav
2015

Using acoustics to observe fine scale schooling behaviour in open ocean and controlled net pen experiments

Nils Olav Handegard, Guillaume Rieucau, Jose Castillo Montoya, Arne Johannes Holmin
2014

Snakkar fisk i stim med kvarandre?

Handegard, Nils Olav
2014

The reaction of a captive herring school to playbacks of a noisy and a conventional research vessel

Nils Olav Handegard, Alex De Robertis, Guillaume Rieucau, Kevin Boswell, Gavin Macaulay
2014

Risk perception affects the schooling dynamic collective anti-predator responses in herring

Guillaume Rieucau, Nils Olav Handegard
2013

Sounds in fishes and the environmental impact of noise – the Norwegian experience

Handegard, Nils Olav
2013

A framework for data flow from observations to advice – the development of a new, efficient data infrastructure at IMR

Nils Olav Handegard, Harald Gjøsæter, Geir Odd Johansen, Jens-Otto Krakstad, Sjur Ringheim-Lid, Helge Sagen, Trond Westgård, Geir Huse
2013

Integrated Ecosystem Observations

Handegard, Nils Olav
2013

A multifrequency acoustic index of Barents Sea euphausiid (krill) biomass?

Ressler Patrick, Gavin Macaulay, Nils Olav Handegard, Padmini Dalpadado, Mette Skern-Mauritzen
2013

Investigating the effect of tones and frequency sweeps on the collective behavior of penned herring (Clupea harengus)

Nils Olav Handegard, Kevin Boswell, Alex De Robertis, Gavin Macaulay, Guillaume Rieucau, Lise Doksæter Sivle
2013

An overview of underwater acoustics applied to observe fish behaviour at the Institute of Marine Research

Handegard, Nils Olav
2010

Behaviorural responses of captive herring to sonar signals (1-1.6 kHz) of a naval frigate throughout a yearly cycle

Lise Henriksen Doksæter, Petter Helgevold Kvadsheim, Nils Olav Handegaard, Olav Rune Godø, Nina Nordlund
2003

Avoidance behaviour in cod (Gadus morhua) to a bottom-trawling vessel

Nils Olav Handegard, Kathrine Michalsen, Dag Bjarne Tjøstheim

Populærvitenskapelige artikler

2002

Climate-fish relations in Norwegian waters

Jan Erik Stiansen, Harald Loeng, Einar Svendsen, Lasse Petterson, Johnny Johannessen, Tore Furevik, Nils Olav Handegard, Olivier Fredo
Fisken og Havet 6

Vitenskapelige artikler (NVI)

2019

From siphonophores to deep scattering layers: Uncertainty ranges for the estimation of global mesopelagic fish biomass

Roland Proud, Nils Olav Handegard, Rudy Kloser, Martin J. Cox, Andrew S. Brierley
ICES Journal of Marine Science 76 p. 718-733
2019

Effects on individual level behaviour in mackerel (Scomber scombrus) of sub-lethal capture related stressors: Crowding and hypoxia

Neil Anders, Kirsten Howarth, Bjørn Totland, Nils Olav Handegard, Maria Tenningen, Michael Breen
PLOS ONE 14
2019

Temporal-spatial, spectral, and source level distributions of fin whale vocalizations in the Norwegian Sea observed with a coherent hydrophone array

Heriberto A. Garcia, Chenyang Zhu, Matthew E. Schinault, Anna I. Kaplan, Nils Olav Handegard, Olav Rune Godø, Heidi Ahonen, Nicholas C. Makris, Delin Wang, Wei Huang, Purnima Ratilal
ICES Journal of Marine Science 76 p. 268-283
2019

Data interoperability between elements of the global ocean observing system

Derrick P. Snowden, Vardis Tsontos, Nils Olav Handegard, Marcos Zarate, Kevin M. O'Brien, Kenneth S. Casey, Neville Smith, Helge Sagen, Kathleen Bailey, Mirtha Lewis, Sean Arms
Frontiers in Marine Science 6:442 p. 1-15
2019

Estimating purse seine volume during capture: implications for fish densities and survival of released unwanted catches

Maria Tenningen, Armin Pobitzer, Nils Olav Handegard, Karen de Jong
ICES Journal of Marine Science
2018

Detection, Localization and Classification of Multiple Mechanized Ocean Vessels over Continental-Shelf Scale Regions with Passive Ocean Acoustic Waveguide Remote Sensing

Chenyang Zhu, Heriberto Garcia, Anna Kaplan, Matthew Schinault, Nils Olav Handegard, Olav Rune Godø, Wei Huang, Purnima Ratilal
Remote Sensing 10
2018

Fish species identification using a convolutional neural network trained on synthetic data

Vaneeda Allken, Nils Olav Handegard, Shale Rosen, Tiffanie Schreyeck, Thomas Mahiout, Ketil Malde
ICES Journal of Marine Science 76 p. 342-349
2018

Echo integration using non-vertical sonar beams: The bias caused by non-uniform distribution of fish within the echo beam

Sindre Vatnehol, Nils Olav Handegard
Journal of the Acoustical Society of America 144 p. 2160-2165
2018

A method to automatically detect fish aggregations using horizontally scanning sonar

Sindre Vatnehol, Hector Pena, Nils Olav Handegard
ICES Journal of Marine Science 75 p. 1803-1812
2018

Automatic interpretation of otoliths using deep learning

Endre Moen, Nils Olav Handegard, Vaneeda Allken, Ole Thomas Albert, Alf Harbitz, Ketil Malde
PLOS ONE 13 p. 1-14
2017

Effects on schooling function in mackerel of sub-lethal capture related stressors: Crowding and hypoxia

Nils Olav Handegard, Maria Tenningen, Kirsten Howarth, Neil Anders, Guillaume Rieucau, Michael Breen
PLOS ONE 12 p. 1-16
2017

The loss of schooling function in mackerel in response to crowding but not hypoxia

Nils Olav Handegard, Maria Tenningen, Kirsten Howarth, Neil Anders, Guillaume Rieucau, Michael Breen
PLOS ONE
2017

Method to observe large scale behavioural waves propagating through fish schools using 4D sonar

Nils Olav Handegard, Arne Johannes Holmin, Guillaume Rieucau
ICES Journal of Marine Science 74 p. 804-812
2016

Herring perform stronger collective evasive reactions when previously exposed to killer whales calls

Guillaume Rieucau, Lise Doksæter Sivle, Nils Olav Handegard
Behavioral Ecology 27 p. 538-544
2016

School level structural and dynamic adjustments to risk promote information transfer and collective evasion in herring

Guillaume Rieucau, Arne Johannes Holmin, Jose Carlos Castillo, Iain D. Couzin, Nils Olav Handegard
Animal Behaviour 117 p. 69-78
2016

Mackerel behaviour and seismic signals – a net pen study. Rapport fra Havforskningen nr 19 2016. ISSN 1893-4536.

Lise Doksæter Sivle, Rune Roland Hansen, Hans Erik Karlsen, Nils Olav Handegard
Rapport fra havforskningen 19
2016

Investigating the Effect of Tones and Frequency Sweeps on the Collective Behavior of Penned Herring (Clupea harengus).

Nils Olav Handegard, Kevin Boswell, Alex DeRobertis, Gavin Macaulay, Guillaume Rieucau, Lise Doksæter Sivle
Advances in Experimental Medicine and Biology 875 p. 391-398
2016

Observing the ocean interior in support of integrated management

Verena M. Trenkel, Nils Olav Handegard, Thomas C. Weber
ICES Journal of Marine Science 73 p. 1947-1954
2016

Collective responses of a large mackerel school depend on the size and speed of a robotic fish but not on tail motion

Maarja Kruusmaa, Guillaume Rieucau, José Carlos Castillo Montoya, Riho Markna, Nils Olav Handegard
Bioinspiration & Biomimetics 11
2015

Ecosystem processes are rarely included in tactical fisheries management

Mette Skern-Mauritzen, Geir Ottersen, Nils Olav Handegard, Geir Huse, Gjert Endre Dingsør, Nils Christian Stenseth, Olav Sigurd Kjesbu
Fish and Fisheries 17 p. 165-175
2015

Acoustic surveys of euphausiids and models of baleen whale distribution in the Barents Sea

Patrick H Ressler, Padmini Dalpadado, Gavin Macaulay, Nils Olav Handegard, Mette Skern-Mauritzen
Marine Ecology Progress Series 527 p. 13-29
2015

The reaction of a captive herring school to playbacks of a noise-reduced and a conventional research vessel

Nils Olav Handegard, Alex De Robertis, Guillaume Rieucau, Kevin Boswell, Gavin Macaulay
Canadian Journal of Fisheries and Aquatic Sciences 72 p. 491-499
2014

Marine ecosystem acoustics (MEA): Quantifying processes in the sea at the spatio-temporal scales on which they occur

Olav Rune Godø, Nils Olav Handegard, Howard Browman, Gavin Macaulay, Stein Kaartvedt, Jarl Giske, Egil Ona, Geir Huse, Espen Johnsen
ICES Journal of Marine Science 71 p. 2357-2369
2014

School density affects the strength of collective avoidance responses in wild-caught Atlantic herring (Clupea harengus): a simulated-predator encounter experiment

Guillaume Rieucau, Alex De Robertis, Kevin M. Boswell, Nils Olav Handegard
Journal of Fish Biology 85 p. 1650-1664
2014

Towards of a firmer explanation of large shoal formation, maintenance and collective reactions in marine fish

Guillaume Rieucau, Anders Fernø, Christos Ioannou, Nils Olav Handegard
Reviews in Fish Biology and Fisheries 25 p. 21-37
2014

Experimental evidence of threat-sensitive collective avoidance responses in a large wild-caught herring school

Guillaume Rieucau, Kevin M. Boswell, Alex De Robertis, Gavin Macaulay, Nils Olav Handegard
PLOS ONE 9
2014

Harmful routines? Uncertainty in science and conflicting views on routine petroleum operations in Norway

Anne Blanchard, Kjellrun Hiis Hauge, Gisle Andersen, Jan Helge Fosså, Bjørn Einar Grøsvik, Nils Olav Handegard, Matthias Kaiser, Sonnich Meier, Erik Joel Steinar Olsen, Frode Bendiksen Vikebø
Marine Policy 43 p. 313-320
2013

Feeding herring schools do not react to seismic air gun surveys

Hector Pena, Nils Olav Handegard, Egil Ona
ICES Journal of Marine Science 70 p. 1174-1180
2013

Evaluating the effect of seismic surveys on fish — the efficacy of different exposure metrics to explain disturbance

Nils Olav Handegard, Tron Tronstad, Jens Martin Hovem
Canadian Journal of Fisheries and Aquatic Sciences 70 p. 1271-1277
2013

Towards an acoustic-based coupled observation and modelling system for monitoring and predicting ecosystem dynamics of the open ocean

Nils Olav Handegard, Louis du Buisson, Patrice Brehmer, Stewart J Chalmers, Alex De Robertis, Geir Huse, Rudy Kloser, Gavin Macaulay, Olivier Maury, Patrick H Ressler, Nils Christian Stenseth, Olav Rune Godø
Fish and Fisheries 14 p. 605-615
2013

Fish avoidance of research vessels and the efficacy of noise-reduced vessels: a review

Alex De Robertis, Nils Olav Handegard
ICES Journal of Marine Science 70 p. 34-45
2012

Behavioral Responses of Captive Herring to Sonar Signals (1-1.6 kHz) of a Naval Frigate Throughout a Yearly Cycle

Lise Henriksen Doksæter, Petter Helgevold Kvadsheim, Nils Olav Handegard, Nina Nordlund, Olav Rune Godø
Journal of the Acoustical Society of America 131 p. 1632-1642
2012

Simulations of multi-beam sonar echos from schooling individual fish in a quiet environment

Arne Johannes Holmin, Nils Olav Handegard, Rolf Korneliussen, Dag Bjarne Tjøstheim
Journal of the Acoustical Society of America 132 p. 3720-3734
2012

Behavior of captive herring exposed to naval sonar transmissions (1.0-1.6 kHz) throughout a yearly cycle

Lise Henriksen Doksæter, Nils Olav Handegard, Olav Rune Godø, Petter Helgevold Kvadsheim, Nina Nordlund
Journal of the Acoustical Society of America 131 p. 1632-1642
2012

Vortex formation and foraging in polyphenic spadefoot toad tadpoles

Sepideh Bazazi, Pfennig Karin S., Nils Olav Handegard, Iain D. Couzin
Behavioral Ecology and Sociobiology 66 p. 879-889
2012

Impact of naval sonar signals on Atlantic herring (Clupea harengus) during summer feeding

Lise Henriksen Doksæter, Petter Helgevold Kvadsheim, Michael Ainslie, Andrew Solow, Nils Olav Handegard, Nina Nordlund, Frans-Peter A. Lam
ICES Journal of Marine Science 69 p. 1078-1085
2012

The dynamics of coordinated group hunting and collective information transfer among schooling prey

Nils Olav Handegard, Kevin M. Boswell, Christos Ioannou, Simon P. Leblanc, Dag Bjarne Tjøstheim, Iain D. Couzin
Current Biology 22 p. 1213-1217
2010

Effekter av seismiske undersøkelser på fiskefordeling og fangstrater for garn og line i Vesterålen sommeren 2009

Svein Løkkeborg, Egil Ona, Aud Vold, Hector Pena, Are Salthaug, Bjørn Totland, Jan Tore Øvredal, John Dalen, Nils Olav Handegard
Fisken og Havet 2
2009

Lateral-aspect, target-strength measurements of in situ herring (Clupea harengus)

Geir Pedersen, Nils Olav Handegard, Egil Ona
ICES Journal of Marine Science 66 p. 1191-1196
2009

The sampling volume of trawl and acoustics: estimating availability probabilities from observations of tracked individual fish

Nils Olav Handegard, Dag Bjarne Tjøstheim
Canadian Journal of Fisheries and Aquatic Sciences 66 p. 425-438
2009

Estimating tail-beat frequency using split-beam echosounders

Nils Olav Handegard, Geir Pedersen, Ole Brix
ICES Journal of Marine Science 66 p. 1252-1258
2009

Behavioral responses of herring (Clupea harengus) to 1-2 and 6-7 kHz sonar signals and killer whale feeding sounds

Lise Doksæter, Olav Rune Godø, Nils Olav Handegard, Petter Helgevold Kvadsheim, Frans-Peter A. Lam, Carl Donovan, Patrick J.O. Miller
Journal of the Acoustical Society of America 125 p. 554-564
2006

Pre-spawning herring in a protected area showed only moderate reaction to a surveying vessel

Georg Skaret, Aril Slotte, Nils Olav Handegard, Bjørn Erik Axelsen, Roar Jørgensen
Fisheries Research 78 p. 359-367
2005

When fish meet a trawling vessel: examining the behaviour of gadoids using a free-floating buoy and acoustic split-beam tracking

Nils Olav Handegard, Dag Bjarne Tjøstheim
Canadian Journal of Fisheries and Aquatic Sciences 62 p. 2409-2422
2004

Possible vessel avoidance behaviour of capelin in a feeding area and on a spawning ground

Roar Jørgensen, Nils Olav Handegard, Harald Gjøsæter, Aril Slotte
Fisheries Research 69 p. 251-261
2003

Avoidance behaviour in cod (Gadus morhua) to a bottom-trawling vessel

Nils Olav Handegard, Kathrine Michalsen, Dag Bjarne Tjøstheim
Aquatic Living Resources 16 p. 265-270

Rapporter og avhandlinger

2018

PELFOSS (PELagic Fish Observation System Simulator)

Morten D. Skogen, Nils Olav Handegard, Arne Johannes Holmin, Solfrid Sætre Hjøllo, Erik Askov Mousing, Kjell Rong Utne, Rune Vabø
2016

Korleis kan vi dokumentera at fisken overlever slipping frå not?

Nils Olav Handegard, Maria Tenningen, Marie Hauge
2000

Simulering av torsk (Gadus Morhua) sin reaksjon på fartøystøy

Handegard, Nils Olav

Poster

2018

Towards seamless integration of data and processing software: data products generated from machine-to-machine interfaces

Nils Olav Handegard, Harald Gjøsæter, Espen Johnsen, Sjur Ringheim Lid, Erik Joel Steinar Olsen, Helge Sagen, Ibrahim Umar, Geir Huse
2017

Automatisk klassifisering av svømming i not

Nils Olav Handegard, Ketil Malde, Maria Tenningen, Hector Pena
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