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Academic article
  • 2019. Determining natal origin for improved management of Atlantic bluefin tuna. Frontiers in Ecology and the Environment. 439-444.
  • 2018. Geographical expansion of Northeast Atlantic mackerel (Scomber scombrus) in the Nordic Seas from 2007 to 2016 was primarily driven by stock size and constrained by low temperatures. Deep-sea research. Part II, Topical studies in oceanography.
  • 2016. Quantifying changes in abundance, biomass, and spatial distribution of Northeast Atlantic mackerel (Scomber scombrus) in the Nordic seas from 2007 to 2014. ICES Journal of Marine Science. 359-373.
  • 2016. Feeding strategy of mackerel in the Norwegian Sea relative to currents, temperature, and prey. ICES Journal of Marine Science. 1127-1137.
  • 2016. Feeding Ecology of Northeast Atlantic Mackerel, Norwegian Spring-Spawning Herring and Blue Whiting in the Norwegian Sea. PLOS ONE. 25 pages.
  • 2016. Changes in weight-at-length and size-at-age of mature Northeast Atlantic mackerel (Scomber scombrus) from 1984 to 2013: Effects of mackerel stock size and herring (Clupea harengus) stock size. ICES Journal of Marine Science. 1255-1265.
  • 2015. Tracking individual herring within a semi-enclosed coastal marine ecosystem: 3-Dimensional dynamics from pre- To post-spawning. Marine Ecology Progress Series. 267-279.
  • 2015. Spatially explicit estimates of stock sizes, structure and biomass of herring and blue whiting, and catch data of bluefin tuna. Earth System Science Data. 35-46.
  • 2015. Recent changes in distribution and relative abundance of cetaceans in the Norwegian Sea and their relationship with potential prey. Frontiers in Ecology and Evolution. 1-11.
  • 2015. First records of Atlantic mackerel (Scomber scombrus) from the Svalbard archipelago, Norway, with possible explanations for the extension of its distribution. Arctic. 54-61.
  • 2014. State-dependent spatial and intra-school dynamics in pre-spawning herring Clupea harengus in a semi-enclosed ecosystem. Marine Ecology Progress Series. 251-263.
  • 2014. Prey selection of offshore killer whales (Orcinus orca) in the Northeast Atlantic in late summer: spatial associations with mackerel. Marine Ecology Progress Series. 275-283.
  • 2014. Observations of cetaceans in the south-east sector of the Southern Ocean during summer 2008. Polar Biology. 891-895.
  • 2014. Ecological aspects of fin whale and humpback whale distribution during summer in the Norwegian Sea. Marine Ecology. 221-232.
  • 2014. Comparative ecology of widely distributed pelagic fish species in the North Atlantic: Implications for modelling climate and fisheries impacts. Progress in Oceanography. 219-243.
  • 2013. The effect of depth on the target of a humpback whale(Megaptera novaengliae). Journal of the Acoustical Society of America.
  • 2013. Fin whale (Balaenoptera physalus) target strength measurements. Marine mammal science. 371-388.
  • 2013. Determination of L (max) for Atlantic Bluefin Tuna, Thunnus thynnus (L.), from Meta-Analysis of Published and Available Biometric Data. Reviews in fisheries science. 181-212.
  • 2012. Overlap in distribution and diets of Atlantic mackerel (Scomber scombrus), Norwegian spring-spawning herring (Clupea harengus) and blue whiting (Micromesistius poutassou) in the Norwegian Sea during late summer. Marine Biology Research. 442-460.
  • 2012. Horizontal distribution and overlap of planktivorous fish stocks in the Norwegian Sea during summers 1995-2006. Marine Biology Research. 420-441.
  • 2012. Behavioral Observations of Baleen Whales in Proximity of a Modern Fishing Vessel. Advances in Experimental Medicine and Biology. 335-338.
  • 2012. Acoustic tagging: a suitable method for the study of natural herring behaviour around spawning? Bioacoustics. 383-385.
  • 2011. Evidence that whales (Balaenoptera borealis) visit drifting fish aggregating devices: do their presence affect the processes underlying fish aggregation? Marine Ecology. 176-182.
  • 2011. Cruise report from the coordinated ecosystem survey (IESSNS) with M/V "Libas", M/V "Finnur Fridi" and R/V "Arni Fridriksson" in the Norwegian Sea and surrounding waters 18. July - 31. August 2011. ICES cooperative research report. 31 pages.
  • 2011. Acoustic observations of dusky dolphins Lagenorhyncus obscurus hunting Cape horse mackerel Trachurus capensis off Namibia. Marine Ecology Progress Series. 209-218.
  • 2010. Dusky dolphins Lagenorhynchus obscurus and Cape fur seals Arctocephalus pusillus pusillus: fatty acid composition of their blubber and prey species. South African Journal of Marine Science. 187-196.
  • 2009. Two components of Northeast Atlantic herring within the same school during spawning: support for the existence of a metapopulation? ICES Journal of Marine Science. 1740-1748.
  • 2009. Ecological studies of marine mammals using a seabed-mounted echosounder. ICES Journal of Marine Science. 1029-1036.
  • 2008. Sound production in pre-spawning herring, cod and haddock in a naturally enclosed ecosystem. Bioacoustics. 38 -40.
  • 2008. Small-scale spatial variability of sperm and sei whales in relation to oceanographic and topographic features along the Mid-Atlantic Ridge. Deep-sea research. Part II, Topical studies in oceanography. 254-268.
  • 2008. Evaluation of Fisheries Sonar for Whale Detection in Relation to Seismic Survey Operations. Bioacoustics. 327-328.
  • 2008. Distribution and feeding ecology of dolphins along the Mid-Atlantic Ridge between Iceland and the Azores. Deep-sea research. Part II, Topical studies in oceanography. 243-253.
  • 2007. Predators in Marine Ecosystems. Their Role in Monitoring and Management. Fish and Fisheries. 367-368.
  • 2007. Herring at the Arctic front: influence of temperature and prey on their spatio-temporal distribution and migration. Marine Ecology. 123-133.
  • 2007. Echotrace classification and spatial distribution of pelagic fish aggregations around drifting fish aggregating devices (DFAD). Aquatic Living Resources. 343-356.
  • 2007. A major increase in snake pipefish (Entelurus aequoreus) in northern European seas since 2003: potential implications for seabird breeding success. Marine Biology. 973-983.
  • 2005. The behaviour of spawning herring in relation to a survey vessel. ICES Journal of Marine Science. 1061-1064.
  • 2004. RoxAnn bottom classification system, sidescan sonar and video-sledge; spatial resolution and their use in assessing trawling impacts. ICES Journal of Marine Science. 53-63.
  • 2003. Spawning of herring; day or night, today or tomorrow? Aquatic Living Resources. 299-306.
  • 2003. Migration patterns in Norwegian spring-spawning herring: why young fish swim away from the wintering area in late summer. Marine Ecology Progress Series. 197-210.
  • 2003. Killer whales dig deep for dinner. ICES CIEM Newsletter. xx-xx.
  • 2002. How whales influence herring school dynamics in a cold-front area of the Norwegian Sea. ICES Journal of Marine Science. 393-400.
  • 2002. Distribution and abundance of fish in deep-sea coral habitats. Hydrobiologia. 91-99.
  • 2002. Digging in the deep: killer whales' hunting tactic. Polar Biology. 939-941.
  • 2001. Pretty patterns but a simple strategy: predator-prey interactions between juvenile herring and Atlantic puffins observed with multibeam sonar. Canadian Journal of Zoology. 1586-1596.
  • 2001. Killer whales attacking schooling fish: Why force herring from deep water to the surface? Marine mammal science. 343-352.
  • 2000. 'Await' in the pelagic: dynamic trade-off between reproduction and survival within a herring school splitting vertically during spawning. Marine Ecology Progress Series. 259-269.
  • 1999. Herring schooling manoeuvres in response to killer whale attacks. Canadian Journal of Zoology. 1540-1546.
  • 1999. Cross-scale observations on distribution and behavioural dynamics of ocean feeding Norwegian spring spawning herring (Clupea harengus L.). ICES Journal of Marine Science. 613-626.
  • 1999. A length-based hypothesis for feeding migrations in pelagic fish. Canadian Journal of Fisheries and Aquatic Sciences. 26-34.
  • 1998. The challenge of the herring in the Norwegian Sea: Making optimal collective spatial decisions. Sarsia. 149-167.
  • 1998. Extensive gas bubble release i Norwegian spring spawning herring (Clupea harengus L.) during predator avoidance. ICES Journal of Marine Science. 1133-1140.
  • 1998. Changing attitudes and new data: a move toward cooperative responsibility. Reviews in Fish Biology and Fisheries.
  • 1997. Individual based model of fish schooling reactions: Prediction of antipredator behaviour as observed in nature. Fisheries Oceanography. 155-171.
  • 1997. An individual based model of fish school reactions: predicting antipredator behaviour as observed in nature. Fisheries Oceanography. 155-171.
  • 1995. Schooling dynamics of norwegian spring spawning herring (Clupea harengus L.) in a coastal spawning area. Sarsia. 277-284.
Academic lecture
  • 2020. The Institute of Marine Research in Norway.
  • 2020. Science, advice and management of Northeast Atlantic mackerel and Atlantic bluefin tuna.
  • 2020. Science and advice on small and large pelagic fish species in the Northeast Atlantic Ocean.
  • 2019. Science, advice and management on mackerel in the Northeast Atlantic Ocean.
  • 2019. Satellittmerking av makrellstørje i norske farvann.
  • 2019. Resultater fra makrell-økosystemtoktet og rådene fra ICES på makrell, nvg-sild, nordsjøsild og lodde i Barentshavet + kystbrisling.
  • 2019. Gjennomgang av metoderevisjon for makrellbestanden i 2019.
  • 2019. Et utrolig comeback av makrellstørje i norske farvann: Hva skjer og hvorfor?
  • 2018. Situasjonen økosystemet i Norskehavet - hovedfokus på norsk vårgytende sild, kolmule og makrell.
  • 2018. Science and innovation on mackerel in the Northeast Atlantic Ocean.
  • 2018. Science and advice on mackerel in the Northeast Atlantic Ocean.
  • 2018. Pelagiske arter - forskning og råd.
  • 2018. Om spekkhoggaren - den mest utbreidde av verdas sjøpattedyr. No òg i Hardangerfjorden.
  • 2018. Makrellstørje - kunnskapsstatus og forskningsplaner.
  • 2018. Makrellstørja, verdens største tunfisk, er tilbake med tyngde i norske farvann.
  • 2018. Makrellen - kor er den og koss lever den.
  • 2018. Makrell i Norskehavet og langs norskekysten.
  • 2018. Mackerel fishery and management.
  • 2018. Historical distribution of juvenile mackerel northwards along the Norwegian coast and offshore following the 2016 mackerel spawning.
  • 2018. Gjennomgang av makrell-økosystemtoktet (IESSNS) 2018.
  • 2018. Evaluering av makrell-økosystemtoktet i Norskehavet (IESSNS).
  • 2018. Cruise report from the International Ecosystem Summer Survey in the Nordic Seas (IESSNS) 30th og June - 6th of August 2018.
  • 2018. Bluefin tuna in Norway.
  • 2018. Bestandsvurdering av makrellbestanden - hvordan gjør man det.
  • 2018. Bestandsvurdering av makrell- hvordan man gjør det.
  • 2018. Bestandsvurdering av makrell - hvordan gjør man det?
  • 2018. Alternative plausible assessment runs for Northeast Atlantic mackerel.
  • 2018. Alternative assessment runs for Northeast Atlantic (NEA) mackerel.
  • 2017. Vitenskapelig rådgivning - gjennomgang av diskusjonene og konklusjonene fra WKWIDE makrell-benchmark møtet i København 30 jan - 3 feb. 2017.
  • 2017. Ressursforskning i pelagisk fiskeri - makrell.
  • 2017. Radio-Frequency Identification (RFID) tagging and recapture method.
  • 2017. RFID tagging and recapture time series on northeast Atlantic mackerel.
  • 2017. Presentasjon av makrell-økosystemtoktet 3 juli-4 august 2017.
  • 2017. Presentasjon av makrell bestandsberegninger i WGWIDE 2017 og ACOM rådgivning for 2018.
  • 2017. Presentantation of the International Ecosystem Summer Survey in the Nordic Seas (IESSNS) 3rd of July to 4th of August 2017.
  • 2017. NEA mackerel management plan and international quota negotiations in London October 2017.
  • 2017. Mengdemåling av makrellbestanden: Samarbeid mellom forskning og fiskerinæring.
  • 2017. Major results from the mackerel-ecosystem survey (IESSNS) in 2017.
  • 2017. Mackerel assesment and advice for 2018.
  • 2017. Institute of Marine Research - a short overview.
  • 2017. Draft request to ICES concerning long-term management strategy for mackerel in the North-east Atlantic.
  • 2017. Comeback kid - Atlantic bluefin tuna is back in Norway.
  • 2017. Comeback kid - Atlantic bluefin tuna is back big time in Norway.
  • 2017. Collaboration between the Norwegian fishing fleet, industry and Institute of Marine Research.
  • 2016. What is happening in the Norwegian Sea? Spotlight on mackerel, marine mammals and bluefin tuna.
  • 2016. The value of the oceans - the resource base and fishing in the oceans.
  • 2016. Siste nytt fra makrellforskningen ved Havforskningsinstituttet.
  • 2016. Presentation of the International Ecosystem Summer Survey in the Nordic Seas(IESSNS), 1-31 July 2016.
  • 2016. Presentation of the International Ecosystem Summer Survey in the Nordic Seas (IESSNS), 1-31 July 2016.
  • 2016. Pelagisk fisk og sjøpattedyr relasjoner.
  • 2016. Norwegian spring spawning herring (Clupea harengus) – biology, fisheries, collapse and recovery, management and policy .
  • 2016. Northeast Atlantic mackerel - science, advice and answers on specific questions from the Japanese delegation.
  • 2016. Marine økosystem i endring - hva skjer, hvorfor og hva kan vi gjøre?
  • 2016. Makrellstørja - Comeback kid.
  • 2016. Keynote speaker: "Historical mackerel expansion in the Northeast Atlantic during the last decade - what is happening and why?".
  • 2016. Historical mackerel expansion and bluefin tuna comeback in the Norwegian Sea.
  • 2016. Havforskningsinstituttet 2016 og forslag til masteroppgaver.
  • 2016. HI-forskning på kval utafor Sjøpattedyrgruppa.
  • 2016. Comeback kid - makrellstørja tilbake med stor tyngde i norske farvann.
  • 2015. Økosystemet i Norskehavet: Et hav av kunnskap, verdier og inspirasjon.
  • 2015. Økosystemet i Norskehavet og langs norskekysten - Et hav av kunnskap, verdier og inspirasjon.
  • 2015. Using action cameras to quantify fish behaviour and passages rate inside a trawl.
  • 2015. The Holy Mackerel show.
  • 2015. Status for nordøstatlantisk makrell og makrellstørje.
  • 2015. Schooling dynamics of Northeast Atlantic mackerel (Scomber scombrus) feeding in the Norwegian Sea using multibeam sonar.
  • 2015. Norwegian fisheries research.
  • 2015. Mengdemåling av makrellbestanden 2007-2014 fra IESSNS makrell-økosystemtoktet.
  • 2015. Makrellrådgivning fra ICES for 2016.
  • 2015. Makrell og makrellstørje.
  • 2015. International Ecosystem Summer Survey in the Nordic Seas (IESSNS) 1. July - 12. August 2015.
  • 2015. Internasjonal toktrapport fra IESSNS makrell-økosystemtoktet fra juli-august 2015.
  • 2015. Institute of Marine Research - an overview.
  • 2015. Increased biomass indices, spatial distribution and density of Northeast Atlantic (NEA) mackerel (Scomber scombrus) in the Nordic Seas from 2007 to 2014.
  • 2015. ICES råd og kommentarer til ny forvaltningsplan for nordøstatlantisk makrell.
  • 2015. Havforskning - metodikk og rådgivning knyttet til makrell.
  • 2015. Does Atlantic mackerel visit Svalbard for pleasure or out of need?
  • 2015. Development of a standarized surface trawling swept area abundance technique for estimation of Northeast Atlantic mackerel.
  • 2015. Density dependent growth in the mackerel stock.
  • 2015. Cruise report from the International Ecosystem Summer Survey in the Nordic Seas (IESSNS) with M/V ”Brennholm”, M/V “Eros”, M/V “Christian í Grótinum” and R/V “Árni Friðriksson”, 1 July - 10 August 2015.
  • 2015. Cruise report from the International Ecosystem Summer Survey in the Nordic Seas (IESSNS) in July-August 2015.
  • 2015. Collaboration between the Norwegian fishing fleet, industry and the Institute of Marine Research in Norway.
  • 2015. Bestands- og økosystemforskningen, med hovefokus på nvg-sild, makrell og laks i Norskehavet.
  • 2014. Varmere havområders påvirkning på fiskebestander.
  • 2014. Toktgjennomføring og datagrunnlag for bestandsberegninger og rådgivning for makrellbestanden.
  • 2014. Swordfish towards the Arctic Atlantic under climate change.
  • 2014. Presentation of the mackerel-ecosystem survey (IESSNS) 2. July - 12. August 2014.
  • 2014. Presentation of the IESSNS survey 2, July - 12. August 2014.
  • 2014. Observations of gadoid feeding by large baleen whales in the Norwegian Sea.
  • 2014. Observations of gadoid feeding by large baleen whales in the Norwegian Sea.
  • 2014. Makrellstørja: Havets gull er tilbake i norske farvann!
  • 2014. Makrellforskning og makrellbestanden.
  • 2014. Makrell - Hvor stor er bestanden og hvilken innvirkning har den på økosystemet.
  • 2014. Hva skjer i havet? Økosystemet i Norskehavet under lupen.
  • 2014. Forskning, bestandssituasjon og rådgivning på nordøstatlantisk makrell og makrellstørje.
  • 2014. Bestandsstatus, forvaltning og økologi: nvg sild og makrell.
  • 2014. Bestandsstatus, forvaltning og økologi: norsk vårgytende sild og makrell.
  • 2014. Bestandsstatus og økologi for nvg sild, makrell og lodde.
  • 2014. Advice from ICES on mackerel in the Northeast Atlantic for 2015.
  • 2013. Økosystemet i Norskehavet og langs kysten i stor forandring.
  • 2013. Makrellstørjen er nå kommet tilbake i norske farvann.
  • 2013. Makrellstørja, selveste kongen på haugen av fiskeartene på kloden, er nå tilbake i norske farvann.
  • 2013. IESSNS survey July-August 2013.
  • 2013. Hvordan påvirker varmere havområder de store fiskebestandene og våre fiskerier.
  • 2013. Changes in abundance, distribution and migration patterns of Northeast Atlantic mackerel during summers 2007-2013.
  • 2013. Changes in abundance, distribution and migration of Northeast Atlantic mackerel during summers 2007-2013.
  • 2012. Makrellens grenseløse sprell - ekspanderende forskning midt i makrellkrigen.
  • 2012. Kvoteutsiktene for de viktigste fiskeslagene de neste 5 årene.
  • 2010. Humpback whale sightings between the African and Antarctic continent in austral summer 2008.
  • 2009. Seeing by sound at sea: Revealing underwater secrets of dynamic fish schools, diving seabirds and hunting whales and dolphins.
  • 2009. Methods applied for scrutinizing pelagic fish species (mackerel, herring, and blue whiting).
  • 2009. Mackerel - Ecosystem survey in the Norwegian Sea in July-August.
  • 2009. Annual Report and Contribution to Bluefin Year Program (BYP) from Norway.
  • 2008. The Norwegian bluefin tuna fisheriy for the period 1920-1986.
  • 2008. The Antarctic krill and ecosystem survey with r/v GO Sars, in 2008.
  • 2008. Multi-beam sonar and echosounder to study schooling behaviour and predator-prey interactions of marine animals .
  • 2008. Mixing of populations of north-east Atlantic herring within the same school during spawning: support for the existence of a metapopulation.
  • 2008. Ecosystem considerations.
  • 2007. Multi-beam sonar and echosounder to study predator-prey interactions of marine animals .
  • 2007. Dynamikk for marine fisk i vestnordiske farvann.
  • 2006. Økosystemtokt i Norskehavet med M/S "Libas" og M/S "Endre Dyrøy" 15. juli - 6. august 2006.
  • 2006. Marine mammals along the Mid-Atlantic Ridge between Iceland and the Azores: What do the whales tell us about this ecosystem?
  • 2006. MAR-ECO top-predator initiative.
  • 2006. Hvor ble det av fisken på Vestlandskysten?
  • 2006. Hvaler langs den midt-Atlantiske ryggen: hva i all verden gjør de der?
  • 2006. How and why acoustic detectability and catchability of herring change with individual motivation and physiological state in a variable environment: a multi-scale study on a local herring population in southwestern Norway.
  • 2006. From individual decisions to school dynamics of herring: Linking acoustic observations with individual based models.
  • 2005. Top predators along the Mid-Atlantic Ridge.
  • 2005. Top predators (marine mammals and seabirds) along the Mid-Atlantic Ridge (MAR).
  • 2005. Spatial and temporal overlap and trophic interactions between Atlantic saithe (Pollachius virens) and Norwegian spring spawning herring (Clupea harengus) on herring spawning grounds.
  • 2005. Satellite tagging of large baleen whales in Azorean water.
  • 2005. Possible prey of seabirds (Procellariiformes) and marine mammal hot spots along the mid-Atlantic Ridge (MAR) as determined by use of visual observations, Underwater Video Profiler, integrated acoustics and plankton nets.
  • 2005. Distribution of seabirds and cetaceans along the northern mid-Atlantic Ridge in June 2004.
  • 2005. A natural "model" environment (MARE MINIMUM) for studies of ecosystem dynamics with emphasis on herring pre-spawning dynamics.
  • 2004. Sjøpattedyr og sjøfugl langs den Midt-Atlantiske ryggen.
  • 2004. Dyrelivet i verdenshavets ukjente fjellheim, Den midtatlantiske rygg.
  • 2003. Økosystembasert forskning med vekt på predator-bytte og trofiske interaksjoner.
  • 2002. Spawning of herring - Day or night - Today or tomorrow.
  • 2002. Immediate effects of experimental otter trawling on the benthic assemblage of Bear Island (fishery protection zone), Barents Sea.
  • 2001. Impact of herring spawning behaviour on acoustic abundance estimates.
  • 2001. Hvilke strategier benytter hval og fisk for å fange sild, og hvordan i all verden skal silda unngå å bli middagsmat.
  • 2001. How whales influence fish school dynamics in a cold front area.
  • 1999. Herring Overwintering Strategy: A Response to Killer Whale Predation?
  • 1997. Rapid appraisal of the 'health' of fisheries for small pelagics using multivariate, mulitidisciplinary ordination.
Abstract
  • 1999. Individual based model of fish schooling reactions: Prediction of antipredator behaviour as observed in nature. Science.

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