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| Registros recuperados: 77 | |
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| Fabioux, Caroline; Huvet, Arnaud; Lapegue, Sylvie; Heurtebise, Serge; Boudry, Pierre. |
| Today, it is commonly accepted that C. angulata and C. gigas are a single species according to morphological, genetic and experimental hybridization data. Following the viral disease that affected C. angulata and the subsequent expansion of C. gigas in Europe, it was of interest to examine the geographical distribution of both taxa in Europe. We studied the genetic composition of seventeen populations of cupped oysters, sampled in France, Spain, Portugal, Morocco and Italy, using a diagnostic marker, the mitochondrial Cytochrome Oxydase I gene. Results showed two distinct geographical zones. All the populations located in the northern part of the European sampled zone were mainly composed of C. gigas haplotypes whereas populations from southern Europe and... |
| Tipo: Text |
Palavras-chave: Geographical distribution; Crassostrea angulata; Crassostrea gigas; Distribution géographique; Crassostrea angulata; Crassostrea gigas. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/2002/publication-2785.pdf |
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| Marteil, Louis; Trochon, Pierre; Le Dantec, Jean; Moreau, Jean. |
| La présence d'Hexamita chez l'huître a été signalée par Certes dès 1892 mais son rôle dans l'étiologie de certaines maladies n'a été précisé qu'en 1952 par Mackin, Korringa et Hopkins. En Hollande, au Canada, aux U. S. A. ce protozoaire a été jugé responsable de mortalités importantes, survenant particulièrement dans les bassins de stockage, pendant l'hiver: une forte densité de peuplement, un renouvellement insuffisant de l'eau, une basse température étaient considérés comme des facteurs favorables au développement de ce flagellé. |
| Tipo: Text |
Palavras-chave: Ostrea edulis; Crassostrea angulata; Hexamita; Parasite; Infestation. |
| Ano: 1962 |
URL: http://archimer.ifremer.fr/doc/00005/11583/8208.pdf |
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| Deltreil, Jean-pierre. |
| A peine l'ostréiculture se relevait-elle des dommages causés en 1967-1968 par ce qu'on a appelé la "maladie des branchies" qu'une deuxième épizootie décimait en 1971 les populations de C. angulata sur l'ensemble du littoral français. Cette situation rappelle celle qu'avait connue O. edulis vers 1920 dont la mortalité avait favorisé l'extension de C. angulata; cinquante ans plus tard, l'ostréiculture a du s'orienter rapidement vers une autre espèce, C. gigas. Nous décrivons l'allure des phénomènes de mortalité et les conséquences qui en ont résulté dans les régions ostréicoles du bassin d'Arcachon et de l'estuaire de la Gironde. |
| Tipo: Text |
Palavras-chave: Ostréiculture; Crassostrea angulata; Mortalité; Bassin Arcachon; Estuaire Gironde. |
| Ano: 1973 |
URL: http://archimer.ifremer.fr/doc/00015/12630/9519.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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| Boudry, Pierre; Huvet, Arnaud. |
| The taxonomic status of Crassostrea angulata and Crassostrea gigas has long been a matter of controversy. Morphological and physiological similarities, as well as homogeneity in allelic frequencies on allozymes between the populations of the two taxa, lead most authors to suggest to regroup of the two within the same species. European and Asian populations of C. gigas and C. angulata have been studied using microsatellite and mitochondrial DNA markers. The analysis of genetic distances and the distribution of allelic and haplotype frequencies revealed a differentiation between the populations of C. gigas and C. angulata. The data allowed the construction of Neighbor-joining trees for each of the two types of markers. Similar topologies appeared with data... |
| Tipo: Text |
Palavras-chave: Mitochondrial DNA; Nuclear DNA; Phylogeography; Crassostrea angulata; Crassostrea gigas; Genetic; Oyster. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/acte-3434.pdf |
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| Alderman, D. J.; Gras, Paul. |
| During April and May of this year, there has been a heavy mortality of Portuguese oysters, Crassostrea angulata LmK., which were imported into Britain from the River Tagus (Portugal) in March. Losses in some cases exceeded 90 per cent. The symptoms shown by the dyring oysters are the same as those seen in Britain and France in C. angulata in 1967 and 1968. Farley described the general symptoms in oysters (C. virginica Gmelin) dying of prolonged functional or infectious disease. These gross symtoms appear to be similar in the case of several different diseases including the present European mortality. |
| Tipo: Text |
Palavras-chave: Gill; Crassostrea angulata; Oysters. |
| Ano: 1969 |
URL: http://archimer.ifremer.fr/doc/1969/publication-5931.PDF |
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| Huvet, Arnaud; Fabioux, Caroline; Mccombie, Helen; Lapegue, Sylvie; Boudry, Pierre. |
| The marine environment is of special interest for studying hybridization between closely related taxa because of the high dispersal potential of planktonic larvae, such as those of most bivalve species. The oysters Crassostrea angulata and C. gigas are known to be very close genetically and entirely inter-fertile under controlled conditions. However, hybridization in the wild had not been investigated, mainly due to the lack of nuclear diagnostic markers. In the present paper, we first estimated genetic differentiation between these 2 closely related taxa using 8 microsatellite markers. Interestingly, 5 markers displayed significant differences of allele size between taxa. The subsequent sequencing of alleles of one of these microsatellites showed several... |
| Tipo: Text |
Palavras-chave: Allele size; Microsatellites; Genetic differentiation; Hybridization; Crassostrea gigas; Crassostrea angulata. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-3355.pdf |
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| Boudry, Pierre; Huvet, Arnaud; Fabioux, Caroline; Lapegue, Sylvie; Heurtebise, Serge; Ledu, Christophe; Blouin, Frederic; Phelipot, Pascal; Gerard, Andre. |
| L'étude de la variabilité génétique de l' huître creuse Crassastrea gigas est un point essentiel dans la mise en place de programmes de gestion des ressources génétiques et de sélection chez cette espèce. C. gigas, originaire du Japon, a été introduite dans de nombreuses régions du monde et représente aujourd'hui plus de 95 % de la production mondiale d' huîtres. Introduite en France au début des années 1970 pour remplacer l' huître portugaise Crassostrea angulata, c'est aujourd 'hui une ressource de première importance pour notre région. Malgré la maîtrise du cycle de reproduction de l'espèce et son importance commerciale, elle n' a pas été génétiquement améliorée et on peut donc considérer les stocks comme « sauvages» ou « non domestiqués ». De plus, la... |
| Tipo: Text |
Palavras-chave: Génétique; Ressources génétiques; Différenciation génétique; Hybridation; Anomalies chromosomiques; Huîtres creuses; Crassostrea gigas; Crassostrea angulata. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00044/15564/12955.pdf |
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| His, Edouard. |
| L'étude du mouvement des valves d'huîtres fournit des renseignements précieux sur le comportement de ces mollusques et sur leur réaction à différentes conditions de milieu. De nombreux auteurs ont souligné le rôle des mouvements valvaires dans les fonctions de nutrition, de respiration, d'excrétion de substance de déchet et de lutte contre des conditions défavorables. Dès 1921 T. C. Nelson étudie l'activité de Crassostrea virginica en fonction de la marée et la lumière; A. E. Hopkins suit l'adaptation d'Ostrea lurida et de C. gigas aux variations de température (1931) et de salinité (1936). Les travaux concernant l'activité des huîtres sont nombreux; nous citerons entre autres ceux de Loosanoff (1928), Loosanoff et Nomejko (1946), Loosanoff et Engle... |
| Tipo: Text |
Palavras-chave: Crassostrea angulata; Activité valvaire; Physiologie; Salinité. |
| Ano: 1969 |
URL: http://archimer.ifremer.fr/doc/00021/13252/10294.pdf |
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| Registros recuperados: 77 | |
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