FN Archimer Export Format PT J TI Origin and route of establishment of the invasive Pacific oyster Crassostrea gigas in Scandinavia BT AF FAUST, Ellika ANDRE, Carl MEURLING, Sara KOCHMANN, Judith CHRISTIANSEN, Henrik JENSEN, Lasse Fast CHARRIER, Gregory LAUGEN, Ane T. STRAND, Asa AS 1:1;2:1;3:2;4:3;5:1,4;6:5;7:6;8:7,8;9:1; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:; C1 Univ Gothenburg, Dept Marine Sci Tjarno, S-45296 Stromstad, Sweden. Uppsala Univ, Dept Ecol & Genet, S-75236 Uppsala, Sweden. Senckenberg Biodiversitat & Klima Forschungszentr, Senckenberg Gesell Nat Forsch, D-60325 Frankfurt, Germany. Katholieke Univ Leuven, Lab Biodivers & Evolutionary Genom, B-3000 Leuven, Belgium. Fisheries & Maritime Museum, DK-6710 Esbjerg V, Denmark. Univ Bretagne Occidentale, Lab Sci Environm Marin LEMAR, UMR 6539, UBO,CNRS,IRD,Ifremer,IUEM, F-29280 Plouzane, France. Novia Univ Appl Sci, Ekenas 10600, Finland. Swedish Univ Agr Sci, Dept Ecol, S-75007 Uppsala, Sweden. C2 UNIV GOTHENBURG, SWEDEN UNIV UPPSALA, SWEDEN SBIK-F, GERMANY UNIV KATHOLIEKE LEUVEN, BELGIUM FISHERIES & MARITIME MUSEUM, DENMARK UBO, FRANCE UNIV APPL SCI, FINLAND UNIV UPSALLA SLU, SWEDEN UM LEMAR IF 2.276 TC 7 UR https://archimer.ifremer.fr/doc/00395/50627/72574.pdf https://archimer.ifremer.fr/doc/00395/50627/72576.pdf LA English DT Article DE ;Population genetics;Microsatellites;Range expansion;Non-native species;Aquaculture;Connectivity;Scandinavia;Skagerrak AB Identifying the routes and rates of introductions is fundamental for the understanding of marine invasions. Recurring introductions over the last 50 yr have led to the establishment of feral Pacific oyster Crassostrea gigas populations throughout Europe. In the northern countries, Sweden and Norway, the species first occurred in large numbers in 2006. Here, we investigated the relative importance of introduction via re-laying of cultured oysters imported for consumption from France, Ireland or the Netherlands, and dispersal of oyster larvae by ocean currents from wild oyster populations in Denmark. Using microsatellite DNA markers, we estimated genetic differentiation among Pacific oysters collected at 4 Swedish locations, 3 Norwegian locations and 9 potential source locations in Denmark, Ireland, the Netherlands and France. All Swedish samples and 1 Norwegian sample(Tromlingene) were genetically similar to each other and the Danish samples and showed significant genetic differentiation from all other populations. Consequently, it appears that the Pacific oyster populations in Sweden, Denmark and Tromlingene are closely connected and/or share a recent origin. The 2 remaining Norwegian samples(Hui and Espevik) differed from each other and all other populations, but showed similarities to wild oyster samples from Scandinavia and Ireland, respectively. Overall, the results underline a complex origin of Norwegian oysters, with gene flow from Swedish/Danish populations, as well as other unidentified sources. The apparent connectivity among most of the Scandinavian populations has implications for regional management of this invasive species, and highlights possible scenarios for other marine invasive species with a similar life history. PY 2017 PD JUN SO Marine Ecology Progress Series SN 0171-8630 PU Inter-research VL 575 UT 000406135500008 BP 95 EP 105 DI 10.3354/meps12219 ID 50627 ER EF