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| Gagnaire, Pierre-alexandre; Lamy, Jean-baptiste; Cornette, Florence; Heurtebise, Serge; Degremont, Lionel; Flahauw, Emilie; Boudry, Pierre; Bierne, Nicolas; Lapegue, Sylvie. |
| The Pacific cupped oyster is genetically subdivided into two sister taxa, Crassostrea gigas and C. angulata, which are in contact in the north-western Pacific. The nature and origin of their genetic and taxonomic differentiation remains controversial due the lack of known reproductive barriers and the high degree of morphologic similarity. In particular, whether the presence of ecological and/or intrinsic isolating mechanisms contributes to species divergence is unknown. The recent co-introduction of both taxa into Europe offers a unique opportunity to test how genetic differentiation is maintained under new environmental and demographic conditions. We generated a pseudo-chromosome assembly of the Pacific oyster genome using a combination of BAC-end... |
| Tipo: Text |
Palavras-chave: Cupped oysters; Genome assembly; Species divergence; Reproductive barriers; Recombination rate. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00455/56622/58337.pdf |
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| Mazurie, Joseph; Bouget, Jean-francois. |
| in order to estimate the carrying capacity of Mont Saint-Michel Bay, the stock (or biomass) of cupped oysters, Crassostrea gigas, cultivated intertidally, in Cancale Bay, has been estimated in october 2002. Aerial photographs, at 2 scales (1/10 000 and 1/2000), provided by the mollusc farmers union, have been used to estimate the cumulative length of surelevaged trestles (« tables ») and the occupation rate by oyster bags. A field survey, between the 7th and 9th of october 2002, has been conducted by Ifremer with the help of « Lycée Maritime de Saint-Malo », on 40 sampled stations : 3 subsample bags per station were examined (counts and weights of different age-class oysters). 309 ha out of 333 leased ha were considered exploited (after elimination of... |
| Tipo: Text |
Palavras-chave: Baie du Mont Saint Michel; Cancale; Crassostrea gigas; Cupped oysters; Production; Biomass; Baie du Mont Saint Michel; Cancale; Crassostrea gigas; Huîtres creuses; Production; Biomasse; Stock. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/rapport-5296.pdf |
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| Lapegue, Sylvie; Batista, Frederico; Heurtebise, Serge; Yu, Ziniu; Boudry, Pierre. |
| The Pacific oyster, Crassostrea gigas (Thunberg), and the Portuguese oyster, C. angulata (Lamarck), are two closely related taxa. Although these two taxa were both introduced from Asia into Europe. one (C. gigas) was voluntarily introduced in the early 1970s, whereas the other (C. angulata) was presumed to be present in Europe for at least four centuries, but nearly disappeared because of disease. Few C. angulata populations remained in southern Portugal, Spain and Morocco and their putative origin was traced in Taiwan. The present paper reports evidence for its presence in Northern China. We reanalyzed recently published mitochondrial cytochrome oxidase C subunit I (COI) sequence data from presumed Dalianwan oysters (C. talienwhanensis) and compared them... |
| Tipo: Text |
Palavras-chave: Phylogeography; Cytochrome oxidase C subunit 1 gene; Crassostrea talienwhanensis; Gigas; Crosstrea; Crassostrea angulata; Cupped oysters. |
| Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/2004/publication-3173.pdf |
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| Lapegue, Sylvie; Heurtebise, Serge; Cornette, Florence; Guichoux, Erwan; Gagnaire, Pierre-alexandre. |
| The Pacific oyster, Crassostrea gigas, was voluntarily introduced from Japan and British Columbia into Europe in the early 1970s, mainly to replace the Portuguese oyster, Crassostrea angulata, in the French shellfish industry, following a severe disease outbreak. Since then, the two species have been in contact in southern Europe and, therefore, have the potential to exchange genes. Recent evolutionary genomic works have provided empirical evidence that C. gigas and C. angulata exhibit partial reproductive isolation. Although hybridization occurs in nature, the rate of interspecific gene flow varies across the genome, resulting in highly heterogeneous genome divergence. Taking this biological property into account is important to characterize genetic... |
| Tipo: Text |
Palavras-chave: Cupped oysters; Population genetics; Introgression; Conservation; Shellfisheries. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00623/73544/72938.pdf |
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