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| Lapegue, Sylvie; Ben Salah, Ines; Batista, Frederico; Heurtebise, Serge; Neifar, L; Boudry, Pierre. |
| Despite the economic importance of oysters due to the high aquaculture production of several species, the current knowledge of oyster phylogeny and systematics is still fragmentary. In Europe, Ostrea edulis, the European flat oyster, and Ostreola stentina, the Provence oyster or dwarf oyster, are both present along the European and African, Atlantic and Mediterranean, coasts. In order to document the relationship not only between O. stentina and O. edulis, but also with the other Ostrea and Ostreola species, we performed a sequence analysis of the 16S mitochondrial fragment (16S rDNA: the large subunit rRNA-coding gene) and the COI fragment (COI: cytochrome oxidase subunit I). Oysters were sampled from populations in Portugal (two populations), Tunisia... |
| Tipo: Text |
Palavras-chave: Tunisia; Portugal; Marocco; Ostreola stentina; Ostreola equestris; Ostrea aupouria; Phylogeographic study. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1912.pdf |
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| Lapegue, Sylvie; Boudry, Pierre. |
| Oysters are among the most familiar of all marine invertebrate taxa. However our knowledge of oyster phylogeny and systematics is fragmentary. This is principally due to the plastic growth patterns of these animals, which result in a wide range of overlapping, ecophenotypic variants that greatly reduce the value of analysis based on shell morphology. Besides that, many intentional or accidental anthropogenic transfers have emphasised this situation. In several cases of misclassification or misidentification of oysters, DNA molecular data, have provided valuable new insights on the tracing of introductions or more generally on the phylogeographic relationships between oyster species. We will illustrate this issue with recent case studies from our lab on... |
| Tipo: Text |
Palavras-chave: Genetic; Ostreola stentina; Crassostrea honkongensis; Crassostrea gigas; Crassostrea angulata; Oysters; Population genetics. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/acte-3475.pdf |
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| Lapegue, Sylvie; Ben Salah, Inès; Batista, Frederico; Heurtebise, Serge; Neifar, Lassad; Boudry, Pierre. |
| Despite the economic importance of numerous oyster species throughout the world, our knowledge of their systematics and phylogeography remains fragmentary. In Europe, the indigenous species, Ostrea edulis, suffered overexploitation as well as two successive parasitosis over the last century. However, this species is still cultivated in Europe, and especially in Spain and France. Its distribution area stretches from the Atlantic coasts of Europe to the north of Africa as well as around the Mediterranean and Black Sea. Its Mediterranean and South Atlantic distribution area is shared with another indigenous species, the dwarf oyster, Ostreola stentina. Its very small adult size (a few centimetres) makes its culture pointless from a commercial point of view.... |
| Tipo: Text |
Palavras-chave: Ostreola stentina; Oyster; Taxonomy; Ostreola stentina; Huître; Taxonomie. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/acte-3364.pdf |
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| Dridi, S.; Romdhane, M. S.; Heurtebise, Serge; El Cafsi, M.; Boudry, Pierre; Lapegue, Sylvie. |
| The taxonomy of oysters has been traditionally based on characteristics of the shell. More recently, the analysis of protein and DNA polymorphism has provided a means to overcome difficulties in distinguishing the different species of oysters based solely on shell morphology. In order to identify oysters of the Tunisian north-east coast, we sequenced a 16S rRNA mitochondrial fragment from 68 oysters sampled from the Bizert Lagoon and the Gulf of Hammamet in northern Tunisia. Comparison of oyster 16S rRNA sequences available in GenBank showed the presence of both Ostreola stentina and Crassostrea gigas in our samples, which could not be detected on the basis of shell morphology only. These data confirmed that C. gigas, a non-native species, is now... |
| Tipo: Text |
Palavras-chave: 16S rRNA; Crassostrea gigas; Genetics; Mediterranean Sea; Ostreola stentina; Polymorphism. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/00000/11063/7820.pdf |
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