Egil Ona

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Telefon: 90998087
Avdeling: Økosystemakustikk

Publikasjoner

Vitenskapelige artikler (NVI)

2016

Estimating the volumes of fish schools from observations with multi-beam sonars

Sindre Vatnehol, Hector Pena, Egil Ona
ICES Journal of Marine Science
2016

Two mechanical rigs for field calibration of multi-beam fishery sonars

Sindre Vatnehol, Atle Totland, Egil Ona
Methods in oceanography 13-14 p. 1-12
2016

Practical calibration of ship-mounted omni-directional fisheries sonars

Gavin Macaulay, Sindre Vatnehol, Ole Bernt Gammelsæter, Hector Pena, Egil Ona
Methods in oceanography 17 p. 206-220
2015

Measuring in situ krill tilt orientation by stereo photogrammetry: Examples for Euphausia superba and Meganyctiphanes norvegica

Rokas Kubilius, Egil Ona, Lucio Calise
ICES Journal of Marine Science 72 p. 2494-2505
2015

Target strengths of two abundant mesopelagic fish species

Ben Scoulding, Dezhang Chu, Egil Ona, Paul G. Fernandes
Journal of the Acoustical Society of America 137 p. 989-1000
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

Broad bandwidth acoustic backscattering from sandeel - measurements and finite element simulations

Tonje Nesse Forland, Halvor Hobæk, Egil Ona, Rolf Korneliussen
ICES Journal of Marine Science 71 p. 1894-1903
2014

Measurements of acoustic attenuation at 38kHz by wind-induced air bubbles with suggested correction factors for hull-mounted transducers

Fannie W. Shabangu, Egil Ona, Dawit Yemane
Fisheries Research 151 p. 47-56
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

Accuracy of the Kirchhoff-approximation and Kirchhoff-ray-mode fish swimbladder acoustic scattering models

Gavin Macaulay, Hector Pena, Sacha M.M. Fässler, Geir Pedersen, Egil Ona
PLoS ONE 8
2012

Target strength and tilt-angle distribution of the lesser sandeel (Ammodytes marinus)

Rokas Kubilius, Egil Ona
ICES Journal of Marine Science 69 p. 1099-1107
2012

Effects of Sounds From Seismic Air Guns on Fish Behavior and Catch Rates

Svein Løkkeborg, Egil Ona, Aud Vold, Are Salthaug
Advances in Experimental Medicine and Biology 730 p. 415-419
2012

Sounds from seismic air guns: gear- and species-specific effects on catch rates and fish distribution

Svein Løkkeborg, Egil Ona, Aud Vold, Are Salthaug
Canadian Journal of Fisheries and Aquatic Sciences 69 p. 1278-1291
2011

A revised target strength-length estimate for blue whiting (Micromesistius poutassou): implications for biomass estimates

Geir Pedersen, Olav Rune Godø, Egil Ona, Gavin John Macaulay
ICES Journal of Marine Science 68 p. 2222-2228
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
2010

The acoustic properties of Salpa thompsoni

Peter H. Wiebe, Dezhang Chu, Stein Kaartvedt, Anna Hoelter Hundt, Webjørn Melle, Egil Ona, Paola Batta-Lona
ICES Journal of Marine Science 67 p. 583-593
2009

Calibration methods for two scientific multibeam systems

Egil Ona, Valerie Mazauric, Lars Nonboe Andersen
ICES Journal of Marine Science 66 p. 1326-1334
2009

Size-dependent frequency response of sandeel schools

Espen Johnsen, Ronald Pedersen, Egil Ona
ICES Journal of Marine Science 66 p. 1100-1105
2009

Inferring the acoustic dead-zone volume by split-beam echo sounder with narrow-beam transducer on a noninertial platform

Ruben Patel, Geir Pedersen, Egil Ona
Journal of the Acoustical Society of America 125 p. 698-705
2009

Measuring herring densities with one real and several phantom research vessels

Ruben Patel, Egil Ona
ICES Journal of Marine Science 66 p. 1264-1269
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 use of an adaptive acoustic-survey design to estimate the abundance of highly skewed fish populations

Alf Harbitz, Egil Ona, Michael Robert Pennington
ICES Journal of Marine Science 66 p. 1349-1354
2009

Quantifying and reducing the surface blind zone and the seabed dead zone using new technology

Atle Totland, Geir Odd Johansen, Olav Rune Godø, Egil Ona, Terje Torkelsen
ICES Journal of Marine Science 66 p. 1370-1376
2007

Estimating and decomposing total uncertainty for survey-based abundance estimates of Norwegian spring-spawning herring

Anders Løland, Magne Aldrin, Egil Ona, Vidar Hjellvik, Jens Christian Holst
ICES Journal of Marine Science 64
2004

Hydroacoustic monitoring of fish in sea cages: target strength (TS) measurements on Atlantic salmon (Salmo salar)

Frank Reier Knudsen, Jan Erik Fosseidengen, Frode Oppedal, Ørjan Karlsen, Egil Ona
Fisheries Research 69 p. 205-209
1996

Comparative fishing trials for cod and haddock using commercial trawl and longline at two different stock levels

Arill Engås, Svein Løkkeborg, Aud vold Soldal, Egil Ona
Journal of Northwest Atlantic Fishery Science 19 p. 83-90
1996

Effects of seismic shooting on local abundance and catch rates of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus)

Arill Engås, Svein Løkkeborg, Egil Ona, Aud vold Soldal
Canadian Journal of Fisheries and Aquatic Sciences 53 p. 2238-2249
1996

Improved mapping of schooling fish near the surface: comparison of abundance estimates obtained by sonar and echo integration

Ole Arve Misund, Asgeir Aglen, Johannes Hamre, Egil Ona, Ingolf Røttingen, Dankert W. Skagen, John Willy Valdemarsen
ICES Journal of Marine Science 53 p. 383-388
1992

Determining the extinction cross section of aggregating fish

Kenneth Foote, Egil Ona, Reidar Toresen
Journal of the Acoustical Society of America 91 p. 1983-1990

Poster

2016

Does an acoustic deep scattering layer show diel vertical migration in the Arctic?

Harald Gjøsæter, Peter H. Wiebe, Egil Ona, Tor Knutsen, Randi Brunvær Ingvaldsen
2015

Traceable calibration of calibration spheres

Gavin Macaulay, Egil Ona, Rokas Kubilius
2012

Minimising ‘Slipping’ Mortality in Purse Seine Fisheries

Bjørnar Isaksen, Jostein Saltskår, Aud Vold, Maria Mikaela Tenningen, Egil Ona, Jan Tore Øvredal, Bjørn Totland, Kurt Hansen, Mike Breen
2007

The 71N vent fields at the Arctic Mid-Ocean Ridge

Rolf Birger Pedersen, Ingunn Hindenes Thorseth, H.P Knudsen, Christoffer Schander, D. Butterfield, M. Lelley, E. Ona, Ingeborg Elisabet Økland, B. Hellevang, Helge Hellevang

Mediebidrag

2003

Smygjeger etter småkryp.Intervju med Svein Sundby og Egil Ona i Bergens Tidende i forbindelse med pressekonferanse og presentasjon av nye ”G.O. Sars”

Svein Sundby, Egil Ona

Kapitler og bøker

2007

Sonar Explorer: A New Tool for Visualization of Fish Schools from 3D Sonar Data

Jean-Paul Balabanian, Ivan Viola, Ruben Patel, Egil Ona, Eduard Gröller

Faglige foredrag

2016

Development of instrumentation for pre-catch identification and sizing of fish

Tonny Algrøy, Egil Ona
2016

Akustisk måling av fisketetthet, og målinger med sonar

Ona, Egil
2016

Hvordan måler vi mengden av fisk i havet, og hvordan beregnes fiskekvotene

Ona, Egil
2016

Measuring important fish stocks with acoustic instruments; how can we do it and where can it go wrong?

Ona, Egil
2016

The TS-probe, a new instrument for detailed TS measurements of single targets and for profiling the water column

Egil Ona, Ronald Pedersen, Rolf Korneliussen
2015

A new fish school segmentation method for fishery sonar

Arne Johannes Holmin, Hector Pena, Egil Ona
2015

CRISP - forkus på nytteverdien for pelagisk sektor

Ona, Egil
2015

Increasing the precision in acoustic estimates of patchy distributed fish

Espen Johnsen, Egil Ona, Alf Harbitz, Hector Pena, Arne Johannes Holmin
2015

Comparative studies and field measurements of the acoustic absorption coefficient in seawater

Dezhang Chu, Gavin Macaulay, Egil Ona
2015

Modelling (mean) target strength of individual herring (Clupea harengus) at any aspect as a function of pressure

Geir Pedersen, Hector Pena, Sacha M.M. Fässler, Gavin Macaulay, Egil Ona
2015

Complementary density estimates of fish layers with echo sounder and scientific sonar

Rolf Korneliussen, Egil Ona, Georg Skaret
2015

calibration of omni-directional fisheries sonar using split beam target positioning

Sindre Vatnehol, Hector Pena, Atle Totland, Gavin Macaulay, Egil Ona
2015

School biomass estimates using digital omnidirectional fisheries sonar

Hector Pena, Egil Ona, Gavin Macaulay, Arne Johannes Holmin, Sindre Nordlund Vatnehol, Ole Bernt Gamelsæter
2015

Target strength of herring and mackerel in dorsal and lateral aspect for sonar biomass estimation

Egil Ona, Gavin Macaulay, Ronald Pedersen
2015

Størrelsesmåling av fisk med bredbåndsekkolodd

Ona, Egil
2015

Hvordan kan vi bestemme mengde og fiskestørrelse i en stim?

Ona, Egil
2014

Biomass estimates for selected herring schools using omni‐directional fisheries sonar and echo sounder

Hector Pena, Egil Ona
2014

Biomass estimation by echo integration using omnidirectional fishery sonar

Hector Pena, Arne Johannes Holmin, Egil Ona
2013

Calibration trails on a omni-directional fisheries sonar with the split beam method

Sindre Vatnehol, Gavin Macaulay, Egil Ona, Atle Totland
2013

Calibration trials on a omnidirectional fishery sonar with the split beam method

Sindre Vatnehol, Atle Totland, Gavin Macaulay, Egil Ona
2012

Improved methods for mapping distribution and abundance of pelagic fish schools with omni-directional fisheries sonar

Hector Pena, Egil Ona
2012

Calibration of a broadband split-beam echosounder and broadband spectra from selected targets

Gavin Macaulay, Egil Ona, Lars nonboe Andersen, Rolf Korneliussen, Lucio Calise
2012

Probing the ocean; a new promising combined observation method

Egil Ona, Ronald Pedersen
2012

The acoustic absorption coefficient at 333 kHz

Egil Ona, Gavin Macaulay, Rolf Korneliussen, Dezhang Chu
2012

A review of possible mitigation measures for reducing mortality in purse-seine fisheries

Mike Breen, Bjørnar Isaksen, Egil Ona, A.O. Pedersen, Geir Pedersen, Jostein Saltskår, B svardal, Maria Mikaela Tenningen, P. J. Thomas, Bjørn Totland, Jan Tore Øvredal, Aud Vold
2011

Trials with broadband split beam echo sounders for zooplankton: some preliminary results from the WESTZOO project

Lars nonboe Andersen, Egil Ona
2011

Calibration of a multibeam echo sounder for abundance estimation of sandeel biomass

Egil Ona, Lars nonboe Andersen, Ruben Patel, Ingvald Kvinge Svellingen
2011

Exploratory measurements using a broadband, split beam echo sounder system

Egil Ona, Lars nonboe Andersen, Haakon Solli, Gavin Macaulay, Lucio Calise, Ruben Patel, Rolf Korneliussen, Tor Knutsen
2011

Ex situ target-strength measurements of Northern krill (Meganyctiphanes norvegica) with a broadband split-beam echosounder prototype

Lucio Calise, Egil Ona, Tor Knutsen, Gavin Macaulay, Ruben Patel, Lars nonboe Andersen, Rokas Kubilius
2011

Estimation of target position using a split-beam broadband echosounder

Gavin Macaulay, Lars Nonboe Andersen, Egil Ona
2011

Exploiting broadband split-beam echosounders for zooplankton; some pre-liminary results from the WESTZOO project

Egil Ona, Lars Nonboe Andersen, Lucio Calise, Gavin Macaulay, Rolf Korneliussen, Tor Knutsen, Dezhang Chu, Anne Dhaussy Lebourges
2011

Orientation of krill and fish in situ as determined by stereogrammetry

Rokas Kubilus, Egil Ona, Georg Skaret
2006

Acoustic Scattering from Atlantic Mackerel Backbones

Tonje Lexau Nesse, Halvor Hobæk, Rolf Jacob Korneliussen, Egil Ona
2001

Complete acoustic recording of water column scatters and sea bed characteristics

H.P Knudsen, W Melle, O.A Misund, E Ona, Dag Lorents Aksnes, Hans Petter Sejrup

Annet tidsskriftbidrag

2016

Broadband acoustics: A viable tool for quantification of cod egg density and distribution?

Gavin Macaulay, Egil Ona, Rokas Kubilius, Olav Rune Godø
Journal of the Acoustical Society of America 140 p. 3243-3243
2009

An introduction to the proceedings and a synthesis of the 2008 ICES Symposium on the Ecosystem Approach with Fisheries Acoustics and Complementary Technologies (SEAFACTS)

David A. Demer, Rudy Kloser, David N MacLennan, Egil Ona
ICES Journal of Marine Science 66 p. 961-965
2001

Complete acoustic recording of water column scatters and sea bed characteristics

Hans Petter Knudsen, Webjørn Raunsgård Melle, Ole Arve Misund, Egil Ona, Dag Lorents Aksnes, Hans Petter Sejrup
Journal of the Acoustical Society of America 109 p. 2423-2423

Rapporter og avhandlinger

2016

Increasing the biomass estimation accuracy of a single fish school using a cylindrical multi-beam fishery sonar

Egil Ona, Sindre Vatnehol
2016

Kan måle fiskestørrelse før fangsting

Ona, Egil
2015

Multi-frequency acoustic discrimination between gas bubble plumes and biological targets in the ocean

Rokas Kubilius, Egil Ona
2012

Modellering av det spredte lydfeltet fra en rigid kule med innfallende lydfelt fra en akustisk sylinderarray (Eng.: Modelling of the sound pressure scattered from a rigid sphere, with incident sound field radiated by a cylindrical acoustic array) (Master thesis)

Sindre Nordlund Vatnehol, Per Lunde, Egil Ona
2009

Improving acoustic abundance estimates of pelagic fish using commercial fishing vessel

Egil Ona, Olav Rune Godø, Hector Eduardo Peña Alid
2007

Bio-acoustic investigations of sound scattering layers overlaying hydrothermal vens in the Arctic Ocean

Ole Nicolai Staurland Aarbakke, Egil Ona
2007

Methodology for in situ target strength measurement of fish

Geir Pedersen, Egil Ona, Halvor Hobæk
2006

Acoustic identification of sandeel (Ammodytes marinus) using multi-frequency methods

Egil Ona, Mohammed Zahor
2005

Acoustic shadowing in dense herring layers, measured from the ventral side by a bottom-mounted transducer

Egil Ona, Kjell Rong Utne
2004

Methods for measuring acoustic extinction in sardine (Sardina pilchardus W.) schools

Martha Uumati, Egil Ona
2004

In situt target strength measurements of Chilean jack mackerel (Trachurus symmetricus murphyi, Nichols) using a commercial vessel with split beam echo sounder

Hector Eduardo Peña Alid, Egil Ona
1999

ICES Cooperative Research Report No.235

Ona, E
1992

Using acoustics to improve precision of bottom trawl indices of abundance. ICES C.M. 1991/D:13

Egil Ona, Michael Robert Pennington, Jon Helge Vølstad
1985

Spredning av gruveavfall i kystområdet utenfor Jøssingfjord fra Titania A/S

Jan Aure, Egil Ona, Svein Sundby
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