Espen Johnsen

Forsker
Telefon: 90606394
Avdeling: Økosystemakustikk

Arbeidsområde

Surveyutvikling, bestandsrådgiving, fiskeribistand

- Overvåkningsmetodikk av tobis i Nordsjøen.

- Bistandsprosjekt i Pakistan.

- Bunnfisk i Nordsjøen.

Curriculum Vitae

Utdannelse

2007. Universitetet i Bergen, Biologisk Institutt
Doktorgrad

1998. Universitetet i Bergen, Institutt for fiskeri og marinbiologi
Hovedfag

Arbeidserfaring

Havforskningsinstituttet i Bergen

2008-. Faggruppe Bunnfisk

2003-2007. Faggruppe Observasjonsmetodikk, PhD - study

2003. Fiskerifaglig senter for utviklingsarbeid


National Marine Information and Research Centre, Namibia

2000–2002. Forskningsprogrammene for orange rough og lysing (hake)

Verv og internasjonale arbeidsoppgaver

2007-. Leder for samarbeidetsprosjektene mellom Marine Fisheries Department, Karachi and Havforskningsinstituttet “Assistance in planning and implementing a marine fisheries resources survey” and “Competence strengthening in fishery institutions in Pakistan”

Norsk representant i “Working Group on the Assessment of Demersal Stocks in the North Sea and Skagerrak” (2004, 2006-2008), “South East Atlantic Fisheries Organization” (2006 and 2007),

Toktleder i Namibia (2003), Angola (2003-2007) and Mozambique (2007).

Publikasjoner

Faglige foredrag

2017

In situ study of the functional response of cod to capelin using broadband acoustics and trawl sampling

Georg Skaret, Johanna Jennifer Elisabeth Fall, Per Fauchald, Øyvind Fiksen, Harald Gjøsæter, Edda Johannesen, Geir Odd Johansen, Espen Johnsen, Gavin Macaulay
2015

Increasing the precision in acoustic estimates of patchy distributed fish

Espen Johnsen, Egil Ona, Alf Harbitz, Hector Pena, Arne Johannes Holmin
2013

Variance and estimates of number of individuals from acoustic surveys

Knut Korsbrekke, Gjert Endre Dingsør, Espen Johnsen
2012

Kvoteutsiktene for de viktigste fiskeslagene de neste 5 årene

Ole Arve Misund, Bjarte Bogstad, tore Haug, Elvar H. Hallfredsson, Irene Huse, Carsten Hvingel, Åge Sigurd Høines, Randi Ingvaldsen, Espen Johnsen, Leif Nøttestad, Erling Kåre Stenevik, Sigurd Tjelmeland, Else Torstensen, Nils Inge Øien

Vitenskapelige artikler (NVI)

2018

Multispecies acoustic dead-zone correction and bias ratio estimates between acoustic and bottom-trawl data

Kotaro Ono, Stan Kotwicki, Gjert Endre Dingsør, Espen Johnsen
ICES Journal of Marine Science 75 p. 361-373
2017

Collective structures anchor massive schools of lesser sandeel to the seabed, increasing vulnerability to fishery

Espen Johnsen, Guillaume Rieucau, Egil Ona, Georg Skaret
Marine Ecology Progress Series 573 p. 229-236
2016

Acoustic identification of marine species using a feature library

Rolf Korneliussen, Yngve Heggelund, Gavin Macaulay, Daniel Patel, Espen Johnsen, Inge Kristian Eliassen
Methods in oceanography 17 p. 187-205
2015

An evaluation of the bottom trawl surveys in the Benguela Current Large Marine Ecosystem

Bjørn Erik E Axelsen, Espen Johnsen
Fisheries Oceanography 24 p. 74-87
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

A new model for simulating growth in fish

Johannes Hamre, Espen Johnsen, Kristin Hamre
PeerJ 2013
2013

Small-scale spatial structuring of burrowed sandeels and the catching properties of the dredge

Espen Johnsen, Alf Harbitz
ICES Journal of Marine Science 70 p. 379-386
2012

A robust method for generating separate catch time-series for each of the hake species caught in the Namibian trawl fishery

Espen Johnsen, J. Kathena
South African Journal of Marine Science 34 p. 43-53
2011

Foetal deformities in a smooth-hound shark, Mustelus mustelus, from an oil exploited area in Angola

Diana Zaera-Perez, Espen Johnsen
Cybium (Paris) 35 p. 231-236
2009

Size-dependent frequency response of sandeel schools

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

Rapporter og avhandlinger

2018

Estimation of acoustic indices with CVs for Northeast Arctic saithe in the Norwegian coastal survey 2003-2017 applying the Sea2Data StoX software.

Sigbjørn Mehl, Espen Johnsen, Åsmund Skålevik, Asgeir Aglen
2016

Re-estimation of swept area indices with CVs for main demersal fish species in the Barents Sea winter survey 1994-2016 applying the Sea2Data StoX software

Sigbjørn Mehl, Asgeir Aglen, Espen Johnsen
2016

Tobis ved Vestlandet og i Nordsjøen 1950-1990

Magnus Tangen, Johannes Hamre, Espen Johnsen, Odd Nakken, Kjell Harald Nedreaas, Øyvind Tangen, Per Ågotnes
2015

Makrellen er en velsignelse for verden og økosystemene

Leif Nøttestad, Espen Johnsen, Kjell Rong Utne
2014

Assessments for management of living marine resources in the Barents Sea and adjacent waters – a focus on methodology The 16th Russian-Norwegian Symposium Sochi, Russia, 10-12 September 2013

Knut Sunnanå, Yuri A. Kovalev, Harald Gjøsæter, Espen Johnsen, Evgeny Shamray
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