Guðmundur J. Óskarsson

2024

Christophe Pampoulie , Aril Slotte, Guðmundur J. Óskarsson , Guðbjörg Ólafsdóttir, Jan Arge Jacobsen, Hóraldur Joensen, Sindri Karl Sigurðsson, Sæmundur Sveinsson, Leif Andersson, Anna Kristín Daníelsdóttir, Davíð Gíslason. Discriminating populations of Atlantic herring mixing in the Norwegian Sea feeding ground using single nucleotide polymorphisms (SNPs). Marine Ecology Progress Series . 2024;739:227-240. 10.3354/meps14619

2023

Warsha Singh , Anna Heiða Ólafsdóttir , Sigurður Þór Jónsson , Guðmundur J. Óskarsson . Capelin in a changing environment. HV2023-43. Haf- og vatnarannsóknir. 2023;43:83.

Warsha Singh , Anna Heiða Ólafsdóttir , Sigurður Þór Jónsson , Guðmundur J. Óskarsson . Loðna á tímum umhverfisbreytinga – afrakstur átaksverkefnis um loðnurannsóknir 2018-2022. HV2023-33. Íslenska.. Haf- og vatnarannsóknir. 2023;33:72.

2021

Guðmundur J. Óskarsson , Guðmundur Þórðarson, Guðni Guðbergsson , Ingibjörg G. Jónsdóttir , Sigurður Guðjónsson, Sólveig R. Ólafsdóttir . Staða umhverfis og vistkerfa í hafinu við Ísland og horfur næstu áratuga. HV 2021-14. Haf- og vatnarannsóknir. 2021.

James Kennedy , Sigurður Þór Jónsson , Höskuldur Björnsson , Guðmundur J. Óskarsson , Bjarki Þór Elvarsson , Guðmundur Þórðarson. Report on benchmark assessment and revision of an advisory rule for lumpfish around Iceland. KV 2021-1. Kver. 2021.

Eliasen SK, et al., Guðmundur J. Óskarsson , et at.. Spatial distribution of different age groups of herring in Norwegian Sea, May 1996-2020. Frontiers in Marine Science . 2021. https://doi.org/10.3389/fmars.2021.778725

Jed I. Macdonald, Ingibjörg G. Jónsdóttir , Russel N. Drysdale, Roman Witt, Þorsteinn Sigurðsson , Guðmundur J. Óskarsson , Zsófia Csagoly, Guðrún Marteinsdóttir. Rules for quantifying otolith chemical variability help expose nursery population structure, site fidelity and multiple origins in a fished herring stock. Fisheries Research. 2021. https://www.sciencedirect.com/science/article/pii/S0165783621001685?via%3Dihub

Thassya C. dos Santos Schmidt , et al., Guðmundur J. Óskarsson , et at.. Adult body growth and reproductive investment vary markedly within and across Atlantic and Pacific herring: a meta-analysis and review of 26 stocks. Reviews in Fish Biology and Fisheries. 2021. https://link.springer.com/article/10.1007/s11160-021-09665-9

Siple M, et al., Guðmundur J. Óskarsson , et at.. Considerations for management strategy evaluation for small pelagic fishes. Fish and Fisheries. 2021. https://doi.org/10.1111/faf.12579

Kvaavik C., Guðmundur J. Óskarsson , Hildur Pétursdóttir , Guðrún Marteinsdóttir, Anna Kristín Daníelsdóttir. New insight into trophic niche partitioning and diet of mackerel (Scomber scombrus) and herring (Clupea harengus) in Icelandic waters. ICES Journal of Marine Science. 2021;78:4:1485–1499. https://doi.org/10.1093/icesjms/fsaa100

2020

Guðmundur J. Óskarsson , Christophe Pampoulie . The genetic composition of feeding aggregations of the Atlantic mackerel (Scomber scombrus) in the central north Atlantic: a microsatellite loci approach. ICES Journal of Marine Science. 2020;77(2):604-612. https://doi.org/10.1093/icesjms/fsaa003

Thassya C. dos Santos Schmidt , et al., Guðmundur J. Óskarsson , James Kennedy , et at.. Environmental stressors may cause unpredicted, notably lagged life-history responses in adults of the planktivorous Atlantic herring. Progress in Oceanography. 2020;181: 102257.1. https://doi.org/10.1016/j.pocean.2019.102257

2019

Guðmundur J. Óskarsson , Hildur Pétursdóttir , Ayca Eleman. Helstu niðurstöður vistfræðileiðangurs í Austurdjúp á RS Árna Friðrikssyni í maí 2019. HV 2019-43. 2019.

Guðmundur J. Óskarsson . Niðurstöður bergmálsmælinga á íslenskri sumargotssíld veturinn 2018/19. HV 2019-37. 2019.

Sigurvin Bjarnason , Birkir Bárðarson , Svanhildur Egilsdóttir , Guðmundur J. Óskarsson . Verification of macroscopic maturity staging in Iceland‐East Greenland‐Jan Mayen capelin (Mallotus villosus). HV 2019-32. 2019.

Teunis Jansen, Sören Post, Anna Heiða Ólafsdóttir , Páll Reynisson , Guðmundur J. Óskarsson , Kristine Engel Arendt. Diel vertical feeding behaviour of Atlantic mackerel (Scomber scombrus) in the Irminger current. Fisheries Research. 2019;214:25-34. https://doi.org/10.1016/j.fishres.2019.01.020

Björn Gunnarsson, Jónas P. Jónasson , Kai Logemann, Guðrún Marteinsdóttir, Guðmundur J. Óskarsson . Recent occurrence and origin of juvenile Atlantic mackerel (Scomber scombrus L.) in Icelandic waters. HV 2019-03. 2019.

Anna Heiða Ólafsdóttir , Kjell Rogn Utne, Jan Arge Jacobsen, Teunis Jansen, Guðmundur J. Óskarsson , Leif Nøttestad, Bjarki Þór Elvarsson , Cecilie Broms, Aril Slotte. 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. 2019. https://doi.org/10.1016/j.dsr2.2018.05.023

Kvaavik C., Guðmundur J. Óskarsson , Anna Kristín Daníelsdóttir, Guðrún Marteinsdóttir. Diet and Feeding Strategy of Northeast Atlantic Mackerel (Scombrus scomber) in Icelandic Waters. PLOS ONE. 2019. https://doi.org/10.1371/journal.pone.0225552

Guðmundur J. Óskarsson , et al.. Variation in egg mass within two Atlantic herring Clupea harengus stocks. Journal of fish biology. 2019;95:367-378. https://doi.org/10.1111/jfb.13956

Guðmundur J. Óskarsson . Fimmtíu ár frá hruni íslensku vorgotssíldarinnar – þróun stofnstærðar og tengsl við aðra síldarstofna. Náttúrufræðingurinn. 2019;89(1-2):49-54.

2018

Guðmundur J. Óskarsson . The existence and population connectivity of Icelandic spring-spawning herring over a 50-year collapse period. ICES Journal of Marine Science. 2018;75:2025-2032. https://doi.org/10.1093/icesjms/fsy120

Guðmundur J. Óskarsson , Sólveig R. Ólafsdóttir , Þorsteinn Sigurðsson , Héðinn Valdimarsson. Observation and quantification of two incidents of mass fish kill of Icelandic summer spawning herring (Clupea harengus) in the winter 2012/2013. Fisheries Oceanography. 2018;27 (4):302-311. https://doi.org/10.1111/fog.12253

2017

Guðmundur J. Óskarsson , Jónbjörn Pálsson, Ásta Guðmundsdóttir. An ichthyophoniasis epizootic in Atlantic herring in marine waters around Iceland. Canadian Journal of Fisheries and Aquatic Sciences. 2017;75 (7):1106-1116. https://doi.org/10.1139/cjfas-2017-0219

Thassya C. dos Santos Schmidt , Aril Slotte, James Kennedy , Svein Sundby, Arne Johannessen, Guðmundur J. Óskarsson , Yutaka Kurita, Nils C. Stenseth, Olav Sigurd Kjesbu. Oogenesis and reproductive investment of Atlantic herring are functions of not only present but long-ago environmental influences as well. Proceedings of the National Academy of Sciences. 2017;114:2634-2639. https://doi.org/10.1073/pnas.1700349114

2016

Teunis Jansen, Sören Post, Trond Kristiansen, Guðmundur J. Óskarsson , Jesper Boje, Brian R. MacKenzie, Mala Broberg, Helle Siegstad. Ocean warming expands habitat of a rich natural resource and benefits a national economy. Ecological Applications. 2016;26 (7):2021-2032. https://doi.org/10.1002/eap.1384

Anna Heiða Ólafsdóttir , Aril Slotte, Jan Arge Jacobsen, Guðmundur J. Óskarsson , Kjell Rogn Utne, Leif Nøttestad. 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. 2016;73:1255-1265. https://doi.org/10.1093/icesjms/fsv142

Guðmundur J. Óskarsson , Christopher T. Taggart, Robert L. Stephenson. Fecundity and reproductive potential of Scotia-Fundy summer- and autumn spawning herring (Clupea harengus L). Canadian Technical Report of Fisheries and Aquatic Sciences. 2016;3182:7+27 p..

2015

Leif Nøttestad, Kjell Rogn Utne, Guðmundur J. Óskarsson , Sigurður Þór Jónsson , Jan Arge Jacobsen, Öyvind Tangen, Valentine Anthonypillai, Sondre Aanes, Jon Helge Völstad, Matteo Bernasconi, Högni Debes, Leon Smith, Sveinn Sveinbjörnsson, Jens C. Holst, Teunis Jansen, Aril Slotte. 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. 2015;73 (2):359-373. https://doi.org/10.1093/icesjms/fsv218

Guðmundur J. Óskarsson , Ásta Guðmundsdóttir, Sveinn Sveinbjörnsson, Þorsteinn Sigurðsson . Feeding ecology of mackerel and dietary overlap with herring in Icelandic waters. Marine Biology Research. 2015;12 (1):16-29. https://doi.org/10.1080/17451000.2015.1073327

Sanne Kjellerup, Michael Dünweber, Eva Friis Möller, Doris Schiedek, Guðmundur J. Óskarsson , Frank Rigét, Kasper Lambert Johansen, Anders Mosbech. Vertical and horizontal distribution of zooplankton and polar cod in southern Baffin Bay (66–71°N) in September 2009. Polar Biology. 2015;38 (5):699-718. https://doi.org/10.1007/s00300-014-1633-4

Lísa Anne Libungan , Guðmundur J. Óskarsson , Aril Slotte, Jan Arge Jacobsen, Snæbjörn Pálsson. Otolith shape: a population marker for Atlantic herring Clupea harengus. Journal of Fish Biology. 2015;86 (4):1377-1395. https://doi.org/10.1111/jfb.12647

Erling Kåre Stenevik, Jon Helge Völstad, Åge Höines, Sondre Aanes, Guðmundur J. Óskarsson , Jan Arge Jacobsen, Öyvind Tangen. Precision in estimates of density and biomass of Norwegian spring-spawning herring based on acoustic surveys. Marine Biology Research. 2015;11 (5):449-461. http://dx.doi.org/10.1080/17451000.2014.995672

Ólafur S. Ástþórsson, Héðinn Valdimarsson, Ásta Guðmundsdóttir, Guðmundur J. Óskarsson . Makríll og ástand sjávar í 100 ár. Ægir. 2015;108:52-56.

Christophe Pampoulie , Aril Slotte, Guðmundur J. Óskarsson , Sarah J. Helyar, Ásbjörn Jónsson, Guðbjörg Ólafsdóttir, Sigurlaug Skírnisdóttir, Lísa Anne Libungan , Jan Arge Jacobsen, Hróaldur Joensen, Henrik Hauch Nielsen, Sindri Karl Sigurðsson, Anna Kristín Daníelsdóttir. Stock structure of Atlantic herring Clupea harengus in the Norwegian Sea and adjacent waters. Marine Ecology Progress Series. 2015;522:219-230. https://doi.org/10.3354/MEPS11114

2014

Verena M. Trenkel, Geir Huse, Brian R. MacKenzie, Paula Alavarez, Haritz Arrizabalanga, Martin Castonguay, Nicolas Goni, Francois Grégoire, Hjálmar Hátún, Teunis Jansen, Jan Arge Jacobsen, Patrick Lehodey, Molly E. Lutacavage, Patrizio Mariani, Gary D. Melvin, John D. Neilson, Leif Nøttestad, Guðmundur J. Óskarsson , Mark R. Payne, David E. Richardson, Inna Senina, Douglas C. Speirs. Comparative ecology of widely distributed pelagic fish species in the North Atlantic: Implications for modelling climate and fisheries impacts. Progress in Oceanography. 2014;129:219-243. http://dx.doi.org/10.1016/j.pocean.2014.04.030

Geir Huse, Brian R. MacKenzie, Verena M. Trenkel, Mathieu Doray, Leif Nøttestad, Guðmundur J. Óskarsson . Spatially explicit estimates of stock sizes, structure and biomass of herring and blue whiting, and catch data of bluefin tuna. Earth System Science Data. 2014;7:457-493. https://doi.org/10.5194/essdd-7-457-2014

Guðmundur J. Óskarsson . A new compilation of stomach content data for commercially important pelagic fish species in the northeast Atlanti. Earth System Science Data. 2014;7:197-223. https://doi.org/10.5194/essdd-7-197-2014

Guðmundur J. Óskarsson , Aril Slotte. Endurheimtur makrílmerkja við Ísland. Sjávarafl. 2014;1 (2):26-27.

Maxim Rybakov, Y. Firsov, M. Nosov, O.Goncharova, Ö.Tangen, V.Anthonypillai, K.Utne, A.Höines, K.A. Mork, W. Melle, E.K. Stenevik, K.J. Stæhr, B. Couperus, M. Kloppmann, Guðmundur J. Óskarsson , Sveinn Sveinbjörnsson, Héðinn Valdimarsson, L. Smith, E.I. Homrum, P. Vestergaard, J.A. Thomassen. International Ecosystem Survey In Nordic Sea (IESNS) IN April-June 2014. Working Document, . WGIPS & WGWIDE. 2014.

2013

Guðbjörg Ólafsdóttir, Kristinn Ólafsson, Sigurlaug Skírnisdóttir, Guðmundur J. Óskarsson , Doreen Kohlbach, Helga Franklínsdóttir, Cecilia Elisabeth Klitgaard Kvaavik, Renée Morneau, André Chevrier, Christophe Pampoulie , Sarah J. Helyar, Anna Kristín Daníelsdóttir. Isolation and characterization of thirty microsatellite loci for Atlantic mackerel (Scomber scombrus L.). Conservation Genetics Resources. 2013;5:4191-494. https://www.doi.org/10.1007/s12686-012-9835-y

Guðmundur J. Óskarsson , Þorsteinn Sigurðsson , Sólveig R. Ólafsdóttir , Héðinn Valdimarsson. Two incidents of mass mortalities of Icelandic summer-spawning herring in Kolgrafafjörður in the winter 2012/2013. ICES North Western Working Group (NWWG), 26 April - 3 May 2013, Working Document No. 1. 11 bls.. 2013.

2012

Ólafur S. Ástþórsson, Héðinn Valdimarsson, Ásta Guðmundsdóttir, Guðmundur J. Óskarsson . Climate-related variations in the occurrence and distribution of mackerel (Scomber scombrus) in Icelandic waters. ICES Journal of Marine Science. 2012;69:1289-1297. https://doi.org/10.1093/icesjms/fss084

Kjell Rogn Utne, Geir Huse, Jens C. Holst, Vladimir Zabavnikov, Jan Arge Jacobsen, Guðmundur J. Óskarsson , Leif Nøttestad. Horizontal distribution and overlap of planktivorous fish stocks in the Norwegian Sea during summers 1995–2006. Marine Biology Research. 2012;8 (5-6):420-441. http://dx.doi.org/10.1080/17451000.2011.640937

Lísa Anne Libungan , Guðbjörg Ólafsdóttir, Sigurlaug Skírnisdóttir, Snæbjörn Pálsson, Christophe Pampoulie , Snædís Björnsdóttir, Kristinn Ólafsson, Guðmundur J. Óskarsson , Anna Kristín Daníelsdóttir. Fourteen new microsatellite markers for Atlantic herring Clupea harengus. Journal of Fish Biology . 2012;81(4):1422-1426. https://doi.org/10.1111/j.1095-8649.2012.03391.x

2010

Guðmundur J. Óskarsson , Jónbjörn Pálsson. Sýking í íslenskri sumargotssíld. Útvegsblaðið. 2010;8:26.

Guðmundur J. Óskarsson , Christopher T. Taggart. Variation in reproductive potential and influence on Icelandic herring recruitment. Fisheries Oceanography. 2010;19:412-426. https://doi.org/10.1111/j.1365-2419.2010.00554.x

2009

Guðmundur J. Óskarsson , Christopher T. Taggart. Spawning time variation in Icelandic summer-spawning herring (Clupea harengus). Canadian Journal of Fisheries and Aquatic Sciences. 2009;66:1666-1681. https://doi.org/10.1139/F09-095

Guðmundur J. Óskarsson , Ásta Guðmundsdóttir, Þorsteinn Sigurðsson . Variation in spatial distribution and migration of Icelandic summer-spawning herring . ICES Journal of Marine Science. 2009;66:1762-1767. https://doi.org/10.1093/icesjms/fsp116

2008

Guðmundur J. Óskarsson . Variation in body condition, fat content and growth rate of Icelandic summer‐spawning herring Clupea harengus L.. Journal of Fish Biology. 2008;72:2655-2676. https://doi.org/10.1111/j.1095-8649.2008.01886.x

2007

Ásta Guðmundsdóttir, Guðmundur J. Óskarsson , Sveinn Sveinbjörnsson. Estimating year-class strength of Icelandic summer-spawning herring on the basis of two survey method. ICES Journal of Marine Science. 2007;6:1182-1190. https://doi.org/10.1093/icesjms/fsm088

2006

Guðmundur J. Óskarsson , Christopher T. Taggart. Fecundity variation in Icelandic summer-spawning herring and implications for reproductive potential. ICES Journal of Marine Science. 2006;63:493-503. https://doi.org/10.1016/j.icesjms.2005.10.002

Sigfús A. Schopka, Jón Sólmundsson , Vilhjálmur Þorsteinsson, Guðmundur J. Óskarsson . Áhrif svæðafriðunar á vöxt og viðgang þorsks. Niðurstöður úr þorskmerkingum út af norðanverðum Vestfjörðum og Húnaflóa sumurin 1994 og 1995 / Samanburður á íslensku sumargotssíldinni sem veiddist fyrir austan og vestan land árið 1997-2003. Fjölrit nr. 123. 2006.

2002

Guðmundur J. Óskarsson , Olav Sigurd Kjesbu, Aril Slotte. Predictions of realised fecundity and spawning time in Norwegian spring-spawning herring (Clupea harengus). Journal of Sea Research. 2002;48 (1):59-79. https://doi.org/10.1016/S1385-1101(02)00135-1