The genetic composition of feeding aggregations of the Atlantic mackerel (Scomber scombrus) in the central north Atlantic: a microsatellite loci approach

Type Article
Date 2020-03
Language English
Author(s) Gislason Davio1, Helyar Sarah J1, 2, Oskarsson Guðmundur J3, Olafsdottir Guðbjorg1, Aril Slotte4, Jensen Teunis5, 6, Jacobsen Jan Arge7, Olafsson Kristinn1, Skirnisdottir Sigurlaug1, Dahle Geir4, Siegstad Helle5, Joensen Horaldur8, Curti Kiersten L.9, Gregoire François10, Masse Jacques11, Sveinsson Sæmundur1, Danıelsdottir Anna Kristın1, Pampoulie Christophe3
Affiliation(s) 1 : Matis Ltd, Vinlandsleid 12, 113 Reykjavik, Iceland
2 : Institute of Global Food Security, Queen's University Belfast, Northern Ireland, UK
3 : Marine and Freshwater Research Institute, Skulagata 4, 101 Reykjavik, Iceland
4 : Institute of Marine Research, Nordnes, P.O. Box 1870, 5817 Bergen, Norway
5 : Greenland Institute of Natural Resources, P.O. Box 570, 3900 Nuuk, Greenland
6 : DTU AQUA, National Institute of Aquatic Resources, 2920 Charlottenlund, Denmark
7 : Faroe Marine Research Institute, Toirshavn, Faroe Islands
8 : University of the Faroe Islands, Toirshavn, Faroe Islands
9 : NOAA/National Marine Fisheries Service, Northeast Fisheries Science Center, 166 Water St, Woods Hole, MA 02543, USA
10 : Department of Fisheries and Ocean Canada, Maurice Lamontagne Institute, 850 route de la mer, P.O. Box 1000, Mont-Joli, QC G5H3Z4, Canada
11 : IFREMER, Unite Evologie et Modeles pour l’halieutique, Centre Atlantique, Rue de l’Ile d’Yeu, BP 21105, 44311 Nantes Cedex 03, France
Source Ices Journal Of Marine Science (1054-3139) (Oxford University Press (OUP)), 2020-03 , Vol. 77 , N. 2 , P. 604-612
DOI 10.1093/icesjms/fsaa003
Keyword(s) Atlantic mackerel, feeding grounds composition, microsatellite loci, migration, population structure
Abstract

The impacts of climate change on marine ecosystems can be seen in the changing distribution, migration, and abundance of species in the oceans. For some species this changing environment may be beneficial and can support population expansions. In the northeast Atlantic (NEA), the Atlantic mackerel (Scomber scombrus) is undergoing an increase in stock size accompanied by changing summer migration patterns, which have resulted in an expansion further north and north west than previously recorded. This study uses microsatellite loci to confirm the differentiation among NEA and northwest Atlantic (NWA) mackerel spawning populations and to assess the level of structuring within these populations. In addition, to enable population-specific exploitation rates to be factored into fisheries management, we identified the origin of individuals composing the expanding feeding aggregations in the central north Atlantic (Greenland, Iceland, Faroes), with all aggregations tested originating from spawning populations in the NEA. This study showed that microsatellite loci were useful to assess the contribution of NEA and NWA populations to mixed feeding aggregations across the north Atlantic for large pelagic fish stocks but were not powerful enough to evaluate the specific contribution of known stocks within NEA and NWA.

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Gislason Davio, Helyar Sarah J, Oskarsson Guðmundur J, Olafsdottir Guðbjorg, Aril Slotte, Jensen Teunis, Jacobsen Jan Arge, Olafsson Kristinn, Skirnisdottir Sigurlaug, Dahle Geir, Siegstad Helle, Joensen Horaldur, Curti Kiersten L., Gregoire François, Masse Jacques, Sveinsson Sæmundur, Danıelsdottir Anna Kristın, Pampoulie Christophe (2020). 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, 77(2), 604-612. Publisher's official version : https://doi.org/10.1093/icesjms/fsaa003 , Open Access version : https://archimer.ifremer.fr/doc/00607/71882/