Bjørn Erik Axelsen

Head of Research/ Research Manager

E-mail: bjorna@hi.no

Telephone: 97144940

Department: Program

Publications

Academic articles

2024

Hydro-acoustic classification and abundance estimation of mesopelagic fish in deep scattering layers (DSL) of the Indian Ocean

Osvaldo Ernesto Chacate, Janet Claire Coetzee, Bjørn Erik Eversvik Axelsen

ICES Journal of Marine Science 81 p. 1330-1344

2021

Distribution and diversity of fish species along the Sudanese Red Sea coast based on three combined trap and gillnet surveys

Erik Joel Steinar Olsen, Bjørn Erik Eversvik Axelsen, Even Moland, Anne Christine Utne-Palm, Elamin Mohammed Elamin, Motassim Ali Mukhtar, Adel Mohamed Saleh, Sheikheldin Mohamed Elamin, Mohamed Abdelhameed Iragi, Said Gumaa Fadul Gumaa

Fisheries Research 242:106032 p. 1-13

2015

Regime shifts in demersal assemblages of the Benguela Current Large Marine Ecosystem: A comparative assessment

Stephen P. Kirkman, Dawit Yemane, Lara J. Atkinson, John Kathena, Silvi Edith Nsiangango, Larvika Singh, Bjørn Erik E Axelsen, Toufiek Samaai

Fisheries Oceanography 24 p. 15-30

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

2015

Synthesis: Climate effects on biodiversity, abundance and distribution of marine organisms in the Benguela

Astrid Jarre, Laurence Hutchings, Stephen P. Kirkman, Anja Kreiner, Pedro C.M. Tchipalanga, Paulus I. Kainge, Uatjavi Uanivi, Anje K. van der Plas, Laura K. Blamey, Janet C. Coetzee, Tarron Lamont, Toufiek Samaai, Hans M. Verheye, Dawit Yemane, Bjørn Erik E Axelsen, Marek Ostrowski, Erling Kåre Stenevik, Harald Loeng

Fisheries Oceanography 24 p. 122-149

2014

State-dependent spatial and intra-school dynamics in pre-spawning herring Clupea harengus in a semi-enclosed ecosystem

Lise Langård, Ole Andreas Fatnes, Arne Johannessen, Georg Skaret, Bjørn Erik E Axelsen, Leif Nøttestad, Aril Slotte, Knut Helge Jensen, Anders Fernø

Marine Ecology Progress Series 501 p. 251-263

2014

Ecological aspects of fin whale and humpback whale distribution during summer in the Norwegian Sea

Leif Nøttestad, Lise Henriksen Doksæter, Bjørn Arne Krafft, Lise Langård, Valentine Anthonypillai, Matteo Bernasconi, Herdis Langøy, Bjørn Erik E Axelsen

Marine Ecology 35 p. 221-232

2014

Assessing changes in the distribution and range size of demersal fish populations in the Benguela Current Large Marine Ecosystem

Davit Yemane, Stephen P. Kirkman, John Kathena, Silvi E. N'siangango, Bjørn Erik E Axelsen, Toufiek Samaai

Reviews in Fish Biology and Fisheries 24 p. 463-483

2013

Identifying and characterizing demersal fish biodiversity hotspots in the Benguela Current Large Marine Ecosystem: relevance in the light of global changes

S.P. Kirkman, Dawit Yemane, J. Kathena, Samuel Mafwila, Silvi Edith Nsiangango, Toufiek Samaai, Bjørn Erik E Axelsen, Larvika Singh

ICES Journal of Marine Science 70 p. 943-954

2012

Temporal and spatial patterns in the abundance of jellyfish in the northern Benguela upwelling ecosystem and their link to thwarted pelagic fishery recovery

B A Flynn, A J Richardson, A. S. Brierley, D. C. Boyer, Bjørn Erik E Axelsen, L Scott, NE Moroff, Paulus I. Kainge, B M Tjizoo, MJ Gibbons

South African Journal of Marine Science 34 p. 131-146

2011

Acoustic observations of dusky dolphins Lagenorhyncus obscurus hunting Cape horse mackerel Trachurus capensis off Namibia

Matteo Bernasconi, Leif Nøttestad, Bjørn Erik E Axelsen, Jens-Otto Krakstad

Marine Ecology Progress Series 429 p. 209-218

2010

Day-night differences in Cunene horse mackerel (Trachurus trecae) acoustic relative densities off Angola

Filomena Vaz Velho, Pedro Barros, Bjørn Erik E Axelsen

ICES Journal of Marine Science 67 p. 1004-1009

2010

Dusky dolphins Lagenorhynchus obscurus and Cape fur seals Arctocephalus pusillus pusillus: fatty acid composition of their blubber and prey species

Otto Grahl-Nielsen, Jens-Otto Krakstad, Leif Nøttestad, Bjørn Erik Axelsen

South African Journal of Marine Science 32 p. 187-196

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

The behaviour of spawning herring in relation to a survey vessel.

Georg Skaret, Bjørn Erik Eversvik Axelsen, Leif Nøttestad, Anders Fernö, Arne Johannessen

ICES Journal of Marine Science 62 p. 1061-1064

2005

The behaviour of spawning herring in relation to a survey vessel

Georg Skaret, B.E. Axelsen, L. Nøttestad, Anders Fernø, Arne Johannessen

ICES Journal of Marine Science 62 p. 1061-1064

2003

Killer whales dig deep for dinner

Leif Nøttestad, Anders Fernø, Bjørn Erik Axelsen

ICES CIEM Newsletter p. xx-xx

2003

Spawning of herring; day or night, today or tomorrow?

Georg Skaret, Leif Nøttestad, Anders Fernø, Arne Johannessen, Bjørn Erik Axelsen

Aquatic Living Resources 16 p. 299-306

2003

Migration patterns in Norwegian spring-spawning herring: why young fish swim away from the wintering area in late summer

Cecilie Kvamme, Leif Nøttestad, Anders Fernø, Ole Arve Misund, Are Dommasnes, Bjørn Erik Axelsen, Padmini Dalpadado, Webjørn Melle

Marine Ecology Progress Series 247 p. 197-210

2002

Digging in the deep: killer whales' hunting tactic

Leif Nøttestad, Anders Fernø, Bjørn E. Axelsen

Polar Biology 25 p. 939-941

2002

Herring as cannibals

G. Skaret, B.E. Axelsen, L. Nøttestad, Anders Fernø, Arne Johannessen

Journal of Fish Biology 61

2001

Pretty patterns but a simple strategy: predator-prey interactions between juvenile herring and Atlantic puffins observed with multibeam sonar

Bjørn Erik E Axelsen, Tycho Anker-Nilssen, Petter Fossum, Cecilie Kvamme, Leif Nøttestad

Canadian Journal of Zoology 79 p. 1586-1596

2000

'Await' in the pelagic: dynamic trade-off between reproduction and survival within a herring school splitting vertically during spawning

Bjørn Erik Axelsen, Leif Nøttestad, Anders Fernö, Arne Johannessen, Ole Arve Misund

Marine Ecology Progress Series 205 p. 259-269

1999

Herring schooling manoeuvres in response to killer whale attacks.

Leif Nøttestad, Bjørn Erik Eversvik Axelsen

Canadian Journal of Zoology 77 p. 1540-1546

Scientific lectures

2018

Bacterial ulcer infections in land based production of large post smolts of Atlantic salmon

Nina Sandlund, Egenberg Marie, Ingrid Uglenes Fiksdal, Bjørn Erik Eversvik Axelsen, Are Klevan

2017

Bacterial ulcer infections in land based production of large post smolts of Atlantic salmon.

Nina Sandlund, Marie Egeberg, Ingrid Uglenes Fiksdal, Bjørn Erik Eversvik Axelsen, Are Klevan

2017

Bacterial ulcer infections in land based production of large post smolts of Atlantic salmon.

Nina Sandlund, Marie Egenberg, Ingrid Uglenes Fiksdal, Bjørn Erik Eversvik Axelsen, Are Klevan

2006

From individual decisions to school dynamics of herring: Linking acoustic observations with individual based models

Rune Vabø, Bjørn Erik Eversvik Axelsen, Leif Nøttestad, Georg Skaret

2005

A natural "model" environment (MARE MINIMUM) for studies of ecosystem dynamics with emphasis on herring pre-spawning dynamics

Arne Johannessen, Leif Nøttestad, Bjørn Erik E Axelsen, Anders Fernø, Rune Vabø, Jan Tore Øvredal

2005

Spatial and temporal overlap and trophic interactions between Atlantic saithe (Pollachius virens) and Norwegian spring spawning herring (Clupea harengus) on herring spawning grounds

Aril Slotte, Arne Runde, Georg Skaret, Bjørn erik Axelsen, Anders Fernø, Arne Johannessen, Leif Nøttestad, Jan Tore Øvredal

2002

Spawning of herring - Day or night - Today or tomorrow

G. Skaret, Leif Nøttestad, Anders Fernø, Arne Johannessen, Bjørn Erik Axelsen

2001

Impact of herring spawning behaviour on acoustic abundance estimates

G. Skaret, Anders Fernø, Leif Nøttestad, Arne Johannessen, Bjørn Erik Axelsen

Poster

2003

Why do dolphins jump?

Leif Nøttestad, Bjørn Erik Eversvik Axelsen, Jens-Otto Krakstad, Bjørn Berland, Filomena Vaz-Velho, Graca Bauleth D'Almeida, Helge Nøttestad

2003

Xenobalanus globicipitis (Crustacea: Cirripedia) on Dusky Dolphin (Lagenorynchus obscurus) Off Namibia: Hitchhiker’s Guide to the Seas

Bjørn Berland, Jens-Otto Krakstad, Leif Nøttestad, Bjørn Erik Eversvik Axelsen

2003

Dusky dolphins (Lagenorhyncus obscurus) chasing horse mackerel (Trachurur trachurur cepensis) in deep water

Bjørn Erik Eversvik Axelsen, Jens Otto krakstad, Leif Nøttestad

2003

Dusky Dolphins (Lagenorhynchus obscurus): Fatty acid composition of their blubber and of their prey

Jens-Otto Krakstad, Ann-Kristin Halvorsen, Leif Nøttesstad, Otto Grahl-Nielsen, J.P. Roux, Bjørn Erik Axelsen, G.B. Almeida, F. Vaz-Velho

2003

Why do dolphins jump?

Leif Nøttestad, B. E. Axelsen, Jens-Otto Krakstad, B Berland, F. Vaz-Velho, G Bauleth-D'Almeida, H. Nøttestad

2003

Xenobalanus globicipitis (Crustacea: Cirripedia) on dusky dolphin (Lagenorhynhus obscurus) off SW Africa: Hitchhiker's guide to the seas

Bjørn Berland, Jens-Otto Krakstad, Leif Nøttestad, Bjørn E. Axelsen, F. Vaz-Velho, G Bauleth-D'Almeida

Reports and dissertations

2001

Impact of herring spawning begaviour on acoustic abundance estimates

Georg Skaret, Anders Fernø, Leif Nøttestad, Arne Johannessen, Bjørn Erik Axelsen

2000

A sonar stydy of Norwegian spring-spawning herring in july

Cecilie Kvamme, Leif Nøttestad, Anders Fernø, Ole Arve Misund, Are Dommasnes, Bjørn Erik E Axelsen

2000

A sonar study of the migration pattern of Norwegian spring-spawning herring (Clupea harengus L.) in July,

Cecilie Kvamme, Leif Nøttestad, Anders Fernö, Ole A. Misund, Are Dommasnes, Bjørn E. Axelsen

1998

A wait in the pelagic: Herring compromising reproduction and survival within a vertically split school

Bjørn Erik Axelsen, Leif Nøttestad, Anders Fernö, Arne Johannessen, Ole Arve Misund

1997

Stimdynamikk hos sild (Clupea harengus L.) under gyting

Axelsen, Bjørn Erik

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Bjørn Erik Axelsen

Publications

Academic articles

Hydro-acoustic classification and abundance estimation of mesopelagic fish in deep scattering layers (DSL) of the Indian Ocean

Distribution and diversity of fish species along the Sudanese Red Sea coast based on three combined trap and gillnet surveys

Regime shifts in demersal assemblages of the Benguela Current Large Marine Ecosystem: A comparative assessment

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

Synthesis: Climate effects on biodiversity, abundance and distribution of marine organisms in the Benguela

State-dependent spatial and intra-school dynamics in pre-spawning herring Clupea harengus in a semi-enclosed ecosystem

Ecological aspects of fin whale and humpback whale distribution during summer in the Norwegian Sea

Assessing changes in the distribution and range size of demersal fish populations in the Benguela Current Large Marine Ecosystem

Identifying and characterizing demersal fish biodiversity hotspots in the Benguela Current Large Marine Ecosystem: relevance in the light of global changes

Temporal and spatial patterns in the abundance of jellyfish in the northern Benguela upwelling ecosystem and their link to thwarted pelagic fishery recovery

Acoustic observations of dusky dolphins Lagenorhyncus obscurus hunting Cape horse mackerel Trachurus capensis off Namibia

Day-night differences in Cunene horse mackerel (Trachurus trecae) acoustic relative densities off Angola

Dusky dolphins Lagenorhynchus obscurus and Cape fur seals Arctocephalus pusillus pusillus: fatty acid composition of their blubber and prey species

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

The behaviour of spawning herring in relation to a survey vessel.

The behaviour of spawning herring in relation to a survey vessel

Killer whales dig deep for dinner

Spawning of herring; day or night, today or tomorrow?

Migration patterns in Norwegian spring-spawning herring: why young fish swim away from the wintering area in late summer

Digging in the deep: killer whales' hunting tactic

Herring as cannibals

Pretty patterns but a simple strategy: predator-prey interactions between juvenile herring and Atlantic puffins observed with multibeam sonar

'Await' in the pelagic: dynamic trade-off between reproduction and survival within a herring school splitting vertically during spawning

Herring schooling manoeuvres in response to killer whale attacks.

Scientific lectures

Bacterial ulcer infections in land based production of large post smolts of Atlantic salmon

Bacterial ulcer infections in land based production of large post smolts of Atlantic salmon.

Bacterial ulcer infections in land based production of large post smolts of Atlantic salmon.

From individual decisions to school dynamics of herring: Linking acoustic observations with individual based models

A natural "model" environment (MARE MINIMUM) for studies of ecosystem dynamics with emphasis on herring pre-spawning dynamics

Spatial and temporal overlap and trophic interactions between Atlantic saithe (Pollachius virens) and Norwegian spring spawning herring (Clupea harengus) on herring spawning grounds

Spawning of herring - Day or night - Today or tomorrow

Impact of herring spawning behaviour on acoustic abundance estimates

Poster

Why do dolphins jump?

Xenobalanus globicipitis (Crustacea: Cirripedia) on Dusky Dolphin (Lagenorynchus obscurus) Off Namibia: Hitchhiker’s Guide to the Seas

Dusky dolphins (Lagenorhyncus obscurus) chasing horse mackerel (Trachurur trachurur cepensis) in deep water

Dusky Dolphins (Lagenorhynchus obscurus): Fatty acid composition of their blubber and of their prey

Why do dolphins jump?

Xenobalanus globicipitis (Crustacea: Cirripedia) on dusky dolphin (Lagenorhynhus obscurus) off SW Africa: Hitchhiker's guide to the seas

Reports and dissertations

Impact of herring spawning begaviour on acoustic abundance estimates

A sonar stydy of Norwegian spring-spawning herring in july

A sonar study of the migration pattern of Norwegian spring-spawning herring (Clupea harengus L.) in July,

A wait in the pelagic: Herring compromising reproduction and survival within a vertically split school

Stimdynamikk hos sild (Clupea harengus L.) under gyting

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