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Title |
Subantarctic transoceanic dispersal: Patagonia-Kerguelen connections. XXXIII SCAR Biennial Meetings and Open Science Conference, 25-28 august 2014, Auckland, New Zealand. |
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Conference - International - Communication |
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2014 |
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1044 |
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5259 |
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Divergence between Antarctic and South American marine invertebrates: what molecules tell us about Scotia Arc geodynamics and the intensification of the Antarctic Circumpolar Current. XXXIII SCAR Biennial Meetings and Open Science Conference, 25-28 august 2014, Auckland, New Zealand. |
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Conference - International - Communication |
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2014 |
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1044 |
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5260 |
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Extinction and recolonization of maritime Antarctica in the limpet Nacella concinna (Strebel, 1908) during the last glacial cycle: toward a model of Quaternary biogeography in shallow Antarctic invertebrates. XXXIII SCAR Biennial Meetings and Open Science Conference, 25-28 august 2014, Auckland, New Zealand. |
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Conference - International - Communication |
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2014 |
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1044 |
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5261 |
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Complete molecular phylogeny in Nacella (Patellogastropoda: Nacellidae) in the Southern Ocean. XXXIII SCAR Biennial Meetings and Open Science Conference, 25-28 august 2014, Auckland, New Zealand. |
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Conference - International - Communication |
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2014 |
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1044 |
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yes |
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5262 |
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The data behind the Biogeographic Atlas of the Southern Ocean. XXXIII SCAR Biennial Meetings and Open Science Conference, 25-28 august 2014, Auckland, New Zealand. |
Type |
Conference - International - Communication |
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Year |
2014 |
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1044 |
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yes |
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5263 |
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Does natural selection explain the fine scale genetic structure at the nuclear exon Glu-5′ in blue mussels from Kerguelen? |
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Journal Article |
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Year |
2015 |
Publication |
Ecology and Evolution |
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Volume |
5 |
Issue |
7 |
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1456-1473 |
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Abstract |
The Kerguelen archipelago, isolated in the Southern Ocean, shelters a blue mussel Mytilus metapopulation far from any influence of continental populations or any known hybrid zone. The finely carved coast leads to a highly heterogeneous habitat. We investigated the impact of the environment on the genetic structure in those Kerguelen blue mussels by relating allele frequencies to habitat descriptors. A total sample comprising up to 2248 individuals from 35 locations was characterized using two nuclear markers, mac-1 and Glu-5′, and a mitochondrial marker (COI). The frequency data from 9 allozyme loci in 9 of these locations were also reanalyzed. Two other nuclear markers (EFbis and EFprem's) were monomorphic. Compared to Northern Hemisphere populations, polymorphism in Kerguelen blue mussels was lower for all markers except for the exon Glu-5′. At Glu-5′, genetic differences were observed between samples from distinct regions (FCT = 0.077), as well as within two regions, including between samples separated by <500 m. No significant differentiation was observed in the AMOVA analyses at the two other markers (mac-1 and COI). Like mac-1, all allozyme loci genotyped in a previous publication, displayed lower differentiation (Jost's D) and FST values than Glu-5′. Power simulations and confidence intervals support that Glu-5′ displays significantly higher differentiation than the other loci (except a single allozyme for which confidence intervals overlap). AMOVA analyses revealed significant effects of the giant kelp Macrocystis and wave exposure on this marker. We discuss the influence of hydrological conditions on the genetic differentiation among regions. In marine organisms with high fecundity and high dispersal potential, gene flow tends to erase differentiation, but this study showed significant differentiation at very small distance. This may be explained by the particular hydrology and the carved coastline of the Kerguelen archipelago, together with spatially variable selection at Glu-5′ |
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1044 |
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2045-7758 |
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5681 |
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Féral J-P, Améziane N, Chenuil A, David B, De Ridder C, Marschal C, Poulin E & Saucède T. |
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Title |
PROTEKER : Mise en place d’un observatoire sous-marin côtier à Kerguelen. 10èmes journées scientifiques du CNFRA, Rennes. |
Type |
Conference - National - Communication |
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Year |
2014 |
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1044 |
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6266 |
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Author |
Poulin E |
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Title |
Molecular insight into historical and recent biogeographical pattern and processes of marine benthic invertebrates in the Southern Ocean. Molecular and genetic advances to understanding evolution and biodiversity in the polar regions. The legacy of EBA, 02-03 October 2014, Naples, Italy |
Type |
Conference - International - Communication |
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Year |
2014 |
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1044 |
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6267 |
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Author |
Gonzalez-Wevar CA, Morley S, Chown S, Coria N, Saucède T, Poulin E. |
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Title |
Extinction and recolonization of maritime Antarctica in the limpet Nacella concinna (Strebel, 1908) during the last glacial cycle: toward a model of Quaternary biogeography in shallow Antarctic invertebrates. 33rd SCAR Open Science Conference, Auckland, New Zealand. |
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Conference - International - Communication |
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Year |
2014 |
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1044 |
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6270 |
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Thomas Saucède, Angie Díaz, Benjamin Pierrat, Javier Sellanes, Bruno David, Jean-Pierre Féral & Elie Poulin |
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Title |
The phylogenetic position and taxonomic status of Sterechinus bernasconiae Larrain, 1975 (Echinodermata, Echinoidea), an enigmatic Chilean sea urchin. |
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Journal Article |
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Year |
2015 |
Publication |
POLAR BIOLOGY |
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Polar Biol. |
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Volume |
38 |
Issue |
8 |
Pages |
1223-1237 |
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Abstract |
Sterechinus is a very common echinoid genus in benthic communities of the Southern Ocean. It is widely distributed across the Antarctic and South Atlantic Oceans and has been the most frequently collected and intensively studied Antarctic echinoid. Despite the abundant literature devoted to Sterechinus, few studies have questioned the systematics of the genus. Sterechinus bernasconiae is the only species of Sterechinus reported from the Pacific Ocean and is only known from the few specimens of the original material. Based on new material collected during the oceanographic cruise INSPIRE on board the R/V Melville, the taxonomy and phylogenetic position of the species are revised. Molecular and morphological analyses show that S. bernasconiae is a subjective junior synonym of Gracilechinus multidentatus (Clark). Results also show the existence of two genetically distinct subclades within the so-called Sterechinus clade: a Sterechinus neumayeri subclade and a subclade composed of other Sterechinus species. The three nominal species Sterechinus antarcticus, Sterechinus diadema, and Sterechinus agassizi cluster together and cannot be distinguished. The species Sterechinus dentifer is weakly differentiated from these three nominal species. The elucidation of phylogenetic relationships between G. multidentatus and species of Sterechinus also allows for clarification of respective biogeographic distributions and emphasizes the putative role played by biotic exclusion in the spatial distribution of species. |
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0722-4060 |
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6291 |
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