FN Archimer Export Format PT J TI Rapid expansion of the invasive oyster Crassostrea gigas at its northern distribution limit in Europe: Naturally dispersed or introduced? BT AF ANGLES D'AURIAC, Marc B. RINDE, Eli NORLING, Pia LAPEGUE, Sylvie STAALSTROM, Andre HJERMANN, Dag O. THAULOW, Jens AS 1:1;2:1;3:1,3;4:2;5:1;6:1;7:1; FF 1:;2:;3:;4:PDG-RBE-SG2M;5:;6:;7:; C1 NIVA, Oslo, Norway. IFREMER, LGPMM SG2M, Lab Genet & Pathol Mollusques Marins, La Tremblade, France. Swedish Agcy Marine & Water Management SwAM, Gothenburg, Sweden. C2 NIVA, NORWAY IFREMER, FRANCE SWAM, SWEDEN SI LA TREMBLADE SE PDG-RBE-SG2M IN WOS Ifremer jusqu'en 2018 DOAJ copubli-europe IF 2.766 TC 19 UR https://archimer.ifremer.fr/doc/00385/49589/50101.pdf https://archimer.ifremer.fr/doc/00385/49589/50109.xlsx LA English DT Article AB The Pacific oyster, Crassostrea gigas, was introduced to Europe for aquaculture purposes, and has had a rapid and unforeseen northward expansion in northern Europe. The recent dramatic increase in number of C. gigas populations along the species' northern distribution limit has questioned the efficiency of Skagerrak as a dispersal barrier for transport and survival of larvae. We investigated the genetic connectivity and possible spreading patterns between Pacific oyster populations on the southern Norwegian coast (4 localities) and Swedish and Danish populations by means of DNA microsatellite analysis of adult oysters, and by simulating larvae drift. In the simulations we used a 3D oceanographic model to explore the influence of recent climate change (1990±2010) on development, survival, and successful spreading of Danish and Swedish Pacific oyster larvae to Norwegian coastal waters. The simulations indicated adequate temperature conditions for development, survival, and settlement of larvae across the Skagerrak in warm years since 2000. However, microsatellite genotyping revealed genetic differences between the Norwegian populations, and between the Norwegian populations and the Swedish and Danish populations, the latter two populations being more similar. This patchwork pattern of genetic dissimilarity among the Norwegian populations points towards multiple local introduction routes rather than the commonly assumed unidirectional entry of larvae drifted from Denmark and Sweden. Alternative origins of introduction and implications for management, such as forecasting and possible mitigation actions, are discussed. PY 2017 PD MAY SO Plos One SN 1932-6203 PU Public Library Science VL 12 IS 5 UT 000401314000081 DI 10.1371/journal.pone.0177481 ID 49589 ER EF