Blar i Havforskningsinstituttet på forfatter "Jacobsen, Jan Arge"
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Advice on fishing opportunities for Barents Sea capelin in 2024 — ICES subareas 1 and 2 excluding Division 2.a west of 5°W
Howell, Daniel; Nielsen, Anders; Stock, Brian; Ono, Kotaro; Clain, Laura; Fossheim, Maria; Wenneck, Thomas de Lange; Harbitz, Alf; Rodriguez, Alfonso Pérez; Iriondo, Ane; Staby, Arved; Bogstad, Bjarte; Husson, Berengere; Marshall, C. Tara; Tranang, Caroline Aas; Johannesen, Edda; Vozgirdas, Eduardas; Eriksen, Elena; Eidset, Elise; Hallfredsson, Elvar H.; Berg, Erik; Skaret, Georg; Höffle, Hannes; Jacobsen, Jan Arge; Stiansen, Jan Erik; Godiksen, Jane Aanestad; Janusz, Jerzy; Fall, Johanna Jennifer Elisabeth; Trochta, John Tyler; Gondra, Jon Ruiz (IMR/PINRO Joint Report Series, Research report, 2023) -
Behaviour of Atlantic salmon (Salmo salar L.) recorded by data storage tags in the NE Atlantic – implications for interception by pelagic trawls
Holm, Marianne; Jacobsen, Jan Arge; Sturlaugsson, Johannes; Holst, Jens Christian (ICES CM documents, Working paper, 2006)In a project carried out in the Nordic Seas (Northeast Atlantic) in 2002 - 2004, 413 Atlantic salmon (Salmo salar L.) were tagged with data storage tags (DST) either logging temperature and depth (StarOddi, Milli) or ... -
Bioenergetics of egg production in Northeast Atlantic mackerel changes the perception of fecundity type and annual trends in spawning stock biomass
Jansen, Teunis; Slotte, Aril; dos Santos Schmidt, Thassya Christina; Sparrevohn, Claus Reedtz; Jacobsen, Jan Arge; Kjesbu, Olav Sigurd (Peer reviewed; Journal article, 2021)Egg surveys are used worldwide for the estimation of spawning stock biomass (SSB) of small pelagic fish species, requiring detailed knowledge about their reproductive biology. In the present study, we revisit the current ... -
Catch comparison between rockhoppers and bobbins ground gear on the Norwegian bottom sampling trawl
Engås, Arill; Jacobsen, Jan Arge; Soldal, Aud Vold (ICES CM Documents;1988/B:31, Working paper, 1988)In a study aimed at improving the reliability of the Norwegian bottom sampling trawl, comparative fishing between standard bobbins gear and rockhopper ground gear were carried out in the Barents Sea. The catch ratios ... -
Diurnal changes in bottom trawl catches and vertical fish distribution
Engås, Arill; Jacobsen, Jan Arge; Soldal, Aud Vold (ICES CM Documents;1988/B:32, Working paper, 1988)Bottom sampling trawl catches and acoustic abundance estimates of North-East Arctic cod and haddock in the Barents Sea were collected and examined according to time of day. The trawl catches were at average larger by day ... -
Drivers of the summer-distribution of Northeast Atlantic mackerel (Scomber scombrus) in the Nordic Seas from 2011 to 2017; a Bayesian hierarchical modelling approach.
Nikolioudakis, Nikolaos; Skaug, Hans J.; Olafsdottir, Anna H.; Jansen, Teunis; Jacobsen, Jan Arge; Enberg, Katja (Journal article; Peer reviewed, 2019)Identifying factors that are statistically correlated with the geographical distribution dynamics of a species can facilitate our understanding of causal physiological and ecological relationships. Northeast Atlantic (NEA) ... -
The early marine distribution of Atlantic salmon in the North-east Atlantic: A genetically informed stock-specific synthesis
Gilbey, John; Utne, Kjell Rong; Wennevik, Vidar; Beck, Alexander Christian; Kausrud, Kyrre Linné; Hindar, Kjetil; de Leaniz, Carlos Garcia; Cherbonnel, Corrine; Coughlan, Jamie; Cross, Tom F.; Dillane, Eileen; Ensing, Dennis; García-Vázquez, Eva; Hole, Lars Robert; Holm, Marianne; Holst, Jens Christian; Jacobsen, Jan Arge; Jensen, Arne Johan; Karlsson, Sten; Ó Maoiléidigh, Niall; Mork, Kjell Arne; Nielsen, Einar Eg; Nøttestad, Leif; Primmer, Craig R.; Prodöhl, Paulo; Prusov, Sergey; Stevens, Jamie R.; Thomas, Katie; Whelan, Ken; McGinnity, Philip; Verspoor, Eric (Peer reviewed; Journal article, 2021)The survival of Atlantic salmon (Salmo salar), an increasingly rare anadromous species, has declined dramatically during its marine phase, with disproportionate impacts on the poorly understood early post-smolt period. ... -
Estimates of stock size of cod, haddock, redfish and greenland halibut in the Barents Sea and the Svalbard area, autumn 1987
Hylen, Arvid; Jacobsen, Jan Arge; Mehl, Sigbjørn; Nedreaas, Kjell Harald (ICES CM Documents;1988/G:44, Working paper, 1988)Combined acoustic and bottom trawl survey for cod and haddock were carried out in the Svalbard area together with an acoustic survey in the Barents Sea in autumn 1987. The abundance index in numbers of cod continued ... -
Estimates of stock size of Northeast Arctic cod and haddock from survey data 1986/1987
Godø, Olav Rune; Hylen, Arvid; Jacobsen, Jan Arge; Jakobsen, Tore; Mehl, Sigbjørn; Nedreaas, Kjell Harald; Sunnanå, Knut (ICES CM documents, Working paper, 1987)Combined acoustic and bottom trawl survey for cod and haddock were carried out in the Svalbard area in autumn 1986 and in the Barents Sea during the winter 1987. An acoustic survey for spwaning cod was carried out in March ... -
Estimates of stock size of northeast Arctic cod and haddock, "Sebastes mentella" and "Sebastes marinus" from survey data, winter 1988
Hylen, Arvid; Jacobsen, Jan Arge; Jakobsen, Tore; Mehl, Sigbjørn; Nedreaas, Kjell Harald; Sunnanå, Knut (ICES CM Documents;1988/G:43, Working paper, 1988)An acoustic survey and a bottom trawl survey for cod and haddock were carried out in the Barents Sea during the winter 1988. The fish still had the westerly distribution established in the previous year, but the echo ... -
Feeding interactions between Atlantic salmon (Salmo salar) postsmolts and other planktivorous fish in the Northeast Atlantic
Utne, Kjell Rong; Thomas, Katie; Jacobsen, Jan Arge; Fall, Johanna Jennifer Elisabeth; Maoiléidigh, Niall Ó.; Broms, Cecilie Thorsen; Melle, Webjørn Raunsgård (Peer reviewed; Journal article, 2020) -
Nutrient-driven poleward expansion of the Northeast Atlantic mackerel (Scomber scombrus) stock: A new hypothesis
Pacariz, Selma V.; Hátún, Hjálmar; Jacobsen, Jan Arge; Johnson, Clare; Eliasen, Solva; Rey, Francisco (Journal article, 2016) -
Poleward spawning of Atlantic mackerel (Scomber scombrus) is facilitated by ocean warming but triggered by energetic constraints
dos Santos Schmidt, Thassya Christina; Slotte, Aril; Olafsdottir, Anna H.; Nøttestad, Leif; Jansen, Teunis; Jacobsen, Jan Arge; Bjarnason, Sigurvin; Lusseau, Susan Mærsk; Ono, Kotaro; Hølleland, Sondre Nedreås; Thorsen, Anders; Sandø, Anne Britt; Kjesbu, Olav Sigurd (Peer reviewed; Journal article, 2023)The Northeast Atlantic mackerel is an income breeder with indeterminate fecundity, spawning in multiple batches at optimal temperatures around 11°C in the upper water column during February–July along the continental shelf ... -
Poor feeding opportunities and reduced condition factor for salmon post-smolts in the Northeast Atlantic Ocean
Utne, Kjell Rong; Pauli, Beatriz Diaz; Haugland, Monika; Jacobsen, Jan Arge; Maoileidigh, Niall O´; Melle, Webjørn Raunsgård; Broms, Cecilie; Nøttestad, Leif; Holm, Marianne; Thomas, Katie; Wennevik, Vidar (Peer reviewed; Journal article, 2021)During the last few decades, many wild Atlantic salmon populations have declined dramatically. One possible contributing factor for the decline is reduced prey availability at sea. Here, we examine post-smolt diet and ... -
Report of the Planning Group on Surveys on Pelagic Fish in the Norwegian Sea [Bergen, Norway, 28- 30 August, 2002]
Jacobsen, Jan Arge; Gudmundsdottir, Asta; Heino, Mikko; Holst, Jens Christian; Krysov, Alexander; Melle, Webjørn; Mork, Kjell Arne; Røttingen, Ingolf; Tangen, Øyvind; Vilhjálmsson, Hjálmar (ICES CM Documents;2002/D:7, Working paper, 2002) -
Report on surveys of the distribution, abundance and migrations of the Norwegian spring-spawning herring, other pelagic fish and the environment of the Norwegian Sea and adjacent waters in late winter, spring and summer of 1997
Vilhjálmsson, Hjálmar; Misund, Ole Arve; Arrhenius, Fredrik; Holst, Jens Christian; Gislason, Ástthor; Gudmundsdottir, Asta; Jacobsen, Jan Arge; Krysov, Alexander; Malmberg, Svend-Aage; Reid, David (ICES CM Documents;1997/Y:4, Working paper, 1997)The distribution and migrations of Norwegian spring spawning herring in the Norwegian Sea in the spring and summer of 1997 were mapped during 11 coordinated surveys carried out by Faroese, Icelandic, Norwegian, Russian ... -
Reports on surveys of the distribution, abundance and migrations of the Norwegian springspawning herring, other pelagic fish and the environment of the Norwegian Sea and adjacent waters in later winter, spring and summer of 1998
Holst, Jens Christian; Melle, Webjørn; Arrhenius, Fredrik; Hammer, Cornelius; Håkansson, Nils; Jacobsen, Jan Arge; Krysov, Alexander; Vilhjálmsson, Hjálmar (ICES CM documents, Working paper, 1998) -
Space-time recapture dynamics of PIT-tagged Northeast Atlantic mackerel (Scomber scombrus) reveal size-dependent migratory behaviour
Ono, Kotaro; Slotte, Aril; Hølleland, Sondre Nedreås; Mackinson, Steven; Jónsson, Sigurður Þór; Jacobsen, Jan Arge; Ólafsdóttir, Anna Heiða (Peer reviewed; Journal article, 2022)Based on GIS-mapping and semi-parametric modelling of recaptures from PIT-tag experiments in the North Sea nursery area (September 2011), the Celtic Seas spawning area (May-June 2014-2021) and the Icelandic Waters feeding ... -
Spatial Distribution of Different Age Groups of Herring in Norwegian Sea, May 1996–2020
Eliasen, Sólvá Káradóttir; Homrum, Eydna í; Jacobsen, Jan Arge; Kristiansen, Inga; Óskarsson, Guðmundur J.; Salthaug, Are; Stenevik, Erling Kåre (Peer reviewed; Journal article, 2021)The commercially important Norwegian spring spawning herring is characterized by its extensive annual migrations and, on a decadal timescale, large shifts in migration patterns. These changes are not well understood, but ... -
Survival of saithe (Pollachius virens L.) escaping through trawl meshes
Jacobsen, Jan Arge; Thomsen, Bjarti; Isaksen, Bjørnar (ICES CM Documents;1992/B:29, Working paper, 1992)A pilot study to estimate the survival of saithe escaping from a cod-end with 145 mm diamond meshes was done in April-May 1992 north of the Faroes. Escaped fish were collected in fine meshed net cages (2x2x5m aluminium ...