Consulta: subjectFacets:"Crassostrea angulata"
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Influence du climat sur le recrutement et sur la production d'huîtres cultivées (Crassostrea angulata et Crassostrea gigas) dans le bassin de Marennes-Oléron (France)
Provedor de dados: 5
Autores: Heral, Maurice; Deslous-paoli, Jean-marc; Prou, Jean.
Recruitment, marketed yield and cultivated biomasses of oysters Crassostrea angulata and Crassostrea gigas are compared to climatic indices for the period 1885-1984. Temperature plays a role up on the date of spawning but explains only partially the failure of recruitment, which has less influence on the marketed yield than on the total biomass Contrary to the sensitivity of wild molluscan stocks to climatic conditions, yield and biomass of these cultivated stocks are not hightly correlated to the annual and seasonal indices of rainfall and air temperature.
Tipo: Text
Palavras-chave: Marennes Oleron Bay; Climatic conditions; Recrutment; Crassostrea gigas; Crassostrea angulata; Oysters; Marennes Oléron; Facteurs climatiques; Recrutement; Crassostrea gigas; Crassostrea angulata; Huîtres.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-2972.pdf

Comparaison de la filtration entre une population de Crassostrea angulata Lmk et une population de Crassostrea gigas Thunberg élevées dans le bassin d'Arcachon
Provedor de dados: 5
Autores: His, Edouard.
L'introduction d'une nouvelle espèce en ostréiculture donne souvent lieu à des débats passionnés dans les milieux ostréicoles. Un exemple est donné par Charles Martin, parqueur du Bassin d'Arcachon, dans son ouvrage "Agriculteur de la mer"; il rapporte les mesures restrictives qu'avait entraînées l'introduction de l'huître portugaise à Arcachon au début du 20ème siècle. Un des arguments avancés pour expliquer les réticences était celui de la "concurrence vitale" et de la compétition sur le plan nutritionnel (filtration) entre C. angulata et Ostrea edulis: cette dernière espèce était alors seule exploitée dans le bassin. Il fallut attendre l'épizootie de 1920, qui anéantit presque totalement l'huître plate, pour que la portugaise soit définitivement admise.
Tipo: Text
Palavras-chave: Ostréiculture; Crassostrea gigas; Crassostrea angulata; Filtration; Bassin Arcachon; Gironde.
Ano: 1970
URL: http://archimer.ifremer.fr/doc/00009/11978/8682.pdf

Etude préalable à la diversification d'huîtres creuses en France : isolement reproductif entre Crassostrea gigas et C. angulata
Provedor de dados: 5
Autores: Balabaud, Karen.
Avec 30 000 tonnes d'huîtres produites chaque année, l'ostréiculture est l'activité principale du bassin de Marennes-Oléron. Caractérisé par une très forte interaction avec les milieux professionnels de la conchyliculture, l'Ifremer se doit avant tout de répondre à leurs questions, en particulier en matière de croissance, de reproduction et surtout en matière de mortalité de l'huître creuse. En effet, l'huître portugaise Crassostrea angulata fut décimée de 1968 à 1972 par un agent pathogène de type iridovirus. Pour faire face à cette disparition des populations d'huîtres japonaises Crassostrea gigas sont alors introduites en France. Mais, les professionnels s'interrogent sur la bonne adaptation de l'huître creuse japonaise à l'environnement français et...
Tipo: Text
Palavras-chave: Génétique; Croisement; Isolement reproductif; Huîtres creuses; Hybrides; Marqueurs moléculaires; PCR; Crassostrea gigas; Crassostrea angulata.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00033/14441/11740.pdf

Rapport sur l'activité du Laboratoire de La Tremblade - Année 1962
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire de La Tremblade concernant l'année 1962
Tipo: Text
Palavras-chave: Rapport activité; Conchyliculture; Hydrologie; Mortalité; Météorologie; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1962
URL: http://archimer.ifremer.fr/doc/00069/18060/15604.pdf

Rapport sur l'activité du laboratoire de La Tremblade - Année 1968
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire ISTPM (Institut Scientifique et Technique des Pêches Maritimes) de La Tremblade - Année 1968
Tipo: Text
Palavras-chave: Rapport activité; Conchyliculture; Hydrologie; Mortalité; Météorologie; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1968
URL: http://archimer.ifremer.fr/doc/00069/18050/15592.pdf

Epizootic diseases of oysters associated with viral infections
Provedor de dados: 5
Autores: Comps, Michel.
Virus infections have been associated with major diseases of oysters of the genus Crassostrea. These infections include gill necrosis virus and hemocytic infection virus diseases of the Portuguese oyster C. angulata and more recently the oyster velar virus disease affecting larval, hatchery-reared Pacific oysters C. gigas. This report presents histo- and cytopathological characteristics of these infections in which large icosahedral cytoplasmic deoxyriboviruses, similar to the iridoviridae, are implicated, The gill necrosis virus causes, principally in the Portuguese oyster, an evolutive ulceration of the gills, including cellular hypertrophy and severe inflammation. Mortalities have been observed in the most serious cases. Hemocytic infection virus has...
Tipo: Text
Palavras-chave: Crassostrea gigas; Crassostrea angulata; Oysters; Viral diseases.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/publication-5912.PDF

Rapport sur l'activité du Laboratoire de La Tremblade - Année 1961
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire de La Tremblade année 1961
Tipo: Text
Palavras-chave: Rapport activité; Conchyliculture; Hydrologie; Mortalité; Météorologie; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1961
URL: http://archimer.ifremer.fr/doc/00069/18059/15603.pdf

Dynamiques des productions et des biomasses des huîtres creuses cultivées (Crassostrea angulata et Crassostrea gigas) dans le bassin de Marennes-Oléron depuis un siècle
Provedor de dados: 5
Autores: Heral, Maurice; Deslous-paoli, Jean-marc; Prou, Jean.
The evolution of the production of cupped oysters is estimated on a century (1885-1985) with three different sources of data. The total biomass in culture is calculated from productions by knowing regularly the growing rate and the mortality rate of the populations of oysters. It appears that the efficiencies of the culture (P/B) decrease when the stock increase. The production reaches a plateau maximum of 40 000 tons whereas the stock goes on to growth up to 200 000 tons. This plateau correspond to the maximal capacity of production of the ecosystem limited by the trophic capacities of the bay. This work shows that without management of the cultivated oysters, the stocks tend to exceed the minimal biomass which is necessary to reach the maximal potential...
Tipo: Text
Palavras-chave: Biomasse; Marennes Oléron; Huîtres; Crassostrea angulata; Crassostrea gigas.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-2965.pdf

Is fertility of hybrids enough to conclude that the two oysters Crassostrea gigas and Crassostrea angulata are the same species?
Provedor de dados: 5
Autores: Huvet, Arnaud; Gerard, Andre; Ledu, Christophe; Phelipot, Pascal; Heurtebise, Serge; Boudry, Pierre.
The distinction of the two cupped oysters Crassostrea gigas (Thunberg, 1793) and Crassostrea angulata (Lamark, 1819) into two species was chiefly due to their differing geographical distributions, C. gigas being present in Asia and C. angulata in Europe. Today it is commonly accepted that C. angulata and C. gigas are a single species according to morphological, genetic and F1 hybridization data. However, the demonstration of the fertility of their hybrids and the absence of any reproductive isolation remained to be investigated. Consequently, we studied the fertility of hybrids and sperm competition by performing three different experiments and producing G1 and G2 hybrid progenies between wild populations of C. angulata and C. gigas. Progenies showed very...
Tipo: Text
Palavras-chave: Crassostrea angulata; Crassostrea gigas; Developmental yields of larvae; Fertility; Controlled crosses; Hybridization.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-1395.pdf

Rapport sur l'activité du Laboratoire de La Tremblade - Biologie conchylicole - Année 1953
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire ISTPM de La Tremblade, biologie conchylicole concernant l'année 1953
Tipo: Text
Palavras-chave: Conchyliculture; Rapport d'activité; Météorologie; Reproduction; Claires ostréicoles; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1953
URL: http://archimer.ifremer.fr/doc/00069/18064/15608.pdf

Influence des facteurs climatiques sur la production conchylicole du bassin de Marennes-Oléron
Provedor de dados: 5
Autores: Heral, Maurice; Prou, Jean; Deslous-paoli, Jean-marc.
The authors are comparing the recruitment, the commercialised production, the cultivated biomasses of oysters Crassostrea gigas and Crassostrea angulata  with the statistics of the meteorology (1885-1984). The temperature plays a role up on the date of spawning but partialy explains the lack of recruitment, which has less impact on the commercialised production than on the total biomass. The annual and seasonal characteristics of the precipitations and water temperatures do not show tight correlations with the variations of the production and of the biomass, for these cultivated populations in opposition with the sensitivity of the natural molluscan populations towards the climatic factors.
Tipo: Text
Palavras-chave: Meteorology; Recruitment; Biomass; Production; Crassostrea angulata; Crassostrea gigas; Météorlogie; Recrutement; Biomasse; Production; Crassostrea gigas; Crassostrea angulata.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-2968.pdf

Rapport sur l'activité du laboratoire de La Tremblade - Année 1960
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire ISTPM (Institut Scientifique et Technique des Pêches Maritimes) de La Tremblade année 1960
Tipo: Text
Palavras-chave: Rapport activité; Conchyliculture; Hydrologie; Mortalité; Météorologie; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1960
URL: http://archimer.ifremer.fr/doc/00069/18054/15596.pdf

Is the Portuguese oyster Crassostrea angulata in Southern Europe endangered by the expansion of the Pacific oyster C. gigas?
Provedor de dados: 5
Autores: Batista, Frederico; Boudry, Pierre; Lapegue, Sylvie; Heurtebise, Serge; Monteiro, C. C.
The Portuguese oyster, Crassostrea angulata, was introduced from Portugal to the French Atlantic Coast in the 1860s. C. angulata quickly settled and expanded and leaded to the development of a new aquacultural industry in France. In the late 1960s, mortality associated with the detection of an iridovirus, led to the wipe out of C. angulata from French Atlantic waters and to the massive introduction of C. gigas to sustain production. In Southern Europe, similar symptoms were also observed in natural stocks of C. angulata from Sado River (Portugal) and from the area of Cadiz (Spain). Nowadays, only very few «pure» populations of C. angulata remain in southern Europe. These populations are potentially endangered by the current expansion of C. gigas...
Tipo: Text
Palavras-chave: Selection; Hybridization; Settlement pattern; Population genetic; Genetic; Oysters; Crassostrea angulata; Crassostrea gigas.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3310.pdf

Un microorganisme de type rickettsien chez l'huître portugaise Crassostrea angulata Lmk
Provedor de dados: 5
Autores: Comps, Michel; Deltreil, Jean-pierre.
A prokaryotic microorganism has been observed in the cells of the digestive gland of Crassostrea angulata, an oyster of economic importance. The study of its characteristics shows that it has a chlamydial type cycle with structural particularities.
Tipo: Text
Palavras-chave: Pathologie; Crassostrea angulata; Huître; Procaryote.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-6081.PDF

Activité comparée chez les espèces Crassostrea angulata Lmk et Crassostrea gigas Thunberg, en hiver
Provedor de dados: 5
Autores: His, Edouard.
L'espèce Crassostrea gigas a été introduite en 1969 à titre d'essai par de nombreux ostréiculteurs du bassin d'Arcachon. La comparaison des vitesses de croissance de cette nouvelle espèce et de l'huître indigène C. angulata est nettement à l'avantage de l'huître japonaise. Cette dernière atteint la taille marchande dans la plupart des cas dès la première année d''immersion dans la baie alors qu'il faut généralement de deux à trois ans pour obtenir le même résultat avec l'huître portugaise.
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Crassostrea angulata; Crassostrea gigas; Physiologie; Comparaison; Bassin Arcachon; Gironde.
Ano: 1971
URL: http://archimer.ifremer.fr/doc/00009/11979/8683.pdf

Sur un copépode parasite de l'huître portugaise (Crassostrea angulata Lmk) dans le bassin de Marennes- Oléron
Provedor de dados: 5
Autores: Comps, Michel.
Dans le bassin de Marennes-Oléron, à partir de l’hiver 1970, on a observé chez Crassostra angulata la présence d’un copépode fixé sur les branchies. Cet organisme a attiré l’attention de certains ostréiculteurs et ce, d’autant plus qu’il n’était rencontré que chez les huîtres immergées dans des claires. Ce copépode posséderait des caractéristiques morphologiques proches de celles des Pseudomyicolidae
Tipo: Text
Palavras-chave: Copépode; Parasite; Huîtres; Crassostrea angulata; Pseudomyicola; Marennes Oléron; Charente Maritime.
Ano: 1972
URL: http://archimer.ifremer.fr/doc/00009/12004/8696.pdf

Une virose de l'huître portugaise (Crassostea angulata LMK)
Provedor de dados: 5
Autores: Comps, Michel; Bonami, Jean-robert; Vago, Constantin; Campillo, Albert.
A viral infection has been observed in the Portuguese oyster Crassostrea angulata during the massive mortalities of 1970-1973. A new type of virus and the viral morphogenesis are described. It is the first virus observed in oysters and linked to an epizooty in this mollusc of great economic importance.
Tipo: Text
Palavras-chave: Infection virale; Crassostrea angulata; Huître; Virologie.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/publication-6084.PDF

Rapport sur l'activité du Laboratoire de La Tremblade - Année 1956
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire ISTPM de La Tremblade concernant l'année 1956
Tipo: Text
Palavras-chave: Conchyliculture; Rapport d'activité; Météorologie; Parasite; Mortalité; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1956
URL: http://archimer.ifremer.fr/doc/00069/18068/15612.pdf

Rapport sur l'activité du laboratoire de La Tremblade - Année 1967
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport d'activité du Laboratoire ISTPM (Institut Scientifique et Technique des Pêches Maritimes) de La Tremblade année 1967
Tipo: Text
Palavras-chave: Rapport activité; Conchyliculture; Hydrologie; Mortalité; Reproduction; Claire ostréicole; Météorologie; Crassostrea angulata; Ostrea edulis; Mytilus edulis.
Ano: 1967
URL: http://archimer.ifremer.fr/doc/00069/18049/15591.pdf

Rapport sur l'activité du Laboratoire de La Tremblade - Année 1955
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire ISTPM de La Tremblade : Année 1955
Tipo: Text
Palavras-chave: Conchyliculture; Rapport d'activité; Météorologie; Reproduction; Claires ostréicoles; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1955
URL: http://archimer.ifremer.fr/doc/00069/18067/15611.pdf

Différenciation génétique et hybridation entre les populations naturelles d'huîtres creuses Crassostrea gigas et Crassostrea angulata
Provedor de dados: 5
Autores: Fabioux, Caroline.
Les deux sous-espèces d'huîtres creuses Crassostrea gigas et Crassostrea angulata originaires d'Asie, sont aujourd'hui présentes en Europe. A la suite de l'observation d'hybridation entre les deux taxons en milieu contrôlé, nous nous sommes demandés s'il existait des phénomènes d'hybridation dans la nature et quels étaient les flux géniques entre les populations des deux taxons. Neuf populations ont été échantillonnées le long des côtes atlantiques de la France, de l'Espagne et du Portugal. La classification des individus dans le taxon C. gigas ou C. angulata peut être déterminée par leur haplotype au locus mitochondrial de la Cytochrome Oxydase I, analysé par la technique de PCR-RFLP. En France et en Espagne, le taxon C. gigas représente plus de 99,9% des...
Tipo: Text
Palavras-chave: Crassostrea gigas; Crassostrea angulata; Hybridation; Différenciation; Marqueurs moléculaires.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00032/14363/11652.pdf

Hybridation naturelle entre les deux sous-espèces d'huîtres creuses Crassostrea gigas et Crassostrea angulata au sud de l'Europe
Provedor de dados: 5
Autores: Huvet, Arnaud; Fabioux, Caroline; Lapegue, Sylvie; Boudry, Pierre.
Crassostrea angulata and Crassostrea gigas, two cupped oysters of Asian origin (O'Foighil et al, 1998), have been introduced successively in Europe during the XVlth and the XXth century (Grizel et Héral, 1991). The present populations of C. angulata appear to be limited to the south of Spain and Portugal, whereas the distribution of C. gigas in Europe is rising because of the development of oyster farming. The distinction between the two subspecies in based on a RFLP marker of the mitochondrial genome (COI) which shows a strong genetic differentiation between the two subspecies populations (Boudry et al., 1998). On the contrary, the nuclear markers (microsatellites) showed a smaller genetic differentiation between them (Huvet et al, under press). The...
Tipo: Text
Palavras-chave: Microsatellite; Hybridation; Crassostrea angulata; Crassostrea gigas; Huîtres; Génétique.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/acte-3282.pdf

Etude de la croissance et de l'activité écophysiologique des huîtres creuses Crassostrea gigas, Crassostrea angulata et de leurs hybrides en système contrôlé
Provedor de dados: 5
Autores: Haure, Joel; Huvet, Arnaud; Palvadeau, Hubert; Nourry, Max; Martin, Jean-louis; Boudry, Pierre; Penisson, Christian.
A comparative study of the growth of the oysters Crassostrea gigas, Crassostrea angulata and their hybrids was carried out in 1999 in system controlled with contribution of the micro alga Skeletonema costatum. The results showed significant differences of the pondéral growth of the four studied progenies. The animals C. gigas had growth rates 1.4 times greater than C. angulata oysters. The hybrid progenies were shown more powerful than Portuguese oysters but are not different from the Japanese oysters. The ecophysiologic study showed that the averages of filtration and oxygen uptake, obtained by means of a three hours recording, cannot differentiate the four studied progenies. On the other hand, the calculation of the FTA (Feeding Time Activity) allowed to...
Tipo: Text
Palavras-chave: Skeletonema costatum; Hybrids; Crassostrea angulata; Crassostrea gigas; Ecophysiology; Growth; Skeletonema costatum; Hybrides; Crassostrea angulata; Crassostrea gigas; Ecophysiologie; Croissance.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-1636.pdf

Impact de Marteilia refringens et de Bonamia ostreae sur l'ostréiculture bretonne
Provedor de dados: 5
Autores: Grizel, Henri.
Two successive diseases struck the flat oyster Ostrea edulis farms in Brittany. These two epizooties lead to some changes in the farming practices. The oyster culture developed towards the open ocean, in the sublitoral part. New techniques have been developed for the culture and collection. The flat oyster has been partially replaced by the cupped oyster Crassostrea gigas whose production went from 3 000 to 16 000 tonnes. They also had heavy consequences on the regional economy. The important mortalities decimated the stocks. The production dropped by about 17 000 tonnes from 1910 to 1982. For the same period of time, profits from the sale of the produced flat oysters dropped from 131.6 million to 65.2 million francs. Numerous companies reduced the surface...
Tipo: Text
Palavras-chave: Bonamia ostreae; Marteilia refringens; Crassostrea gigas; Crassostrea angulata; Ostrea edulis; Huître; Pathologie.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-5924.PDF

Essai de réimplantation de Crassostrea angulata en France. Résistance au chambrage et comportement des hybrides C. angulata - C. gigas
Provedor de dados: 5
Autores: Bougrier, Serge; Raguenes, Gerard; Bachere, Evelyne; Tige, Gilbert; Grizel, Henri.
The inability to rear the oysters C. gigas and O. edulis in certain Brittany waters has prompted us to conduct breeding trials with C. angulata C. gigas and their hybrids. Results have revealed that all the strains tested were sensitive to Tributyl tin (TBT), showing atnormal shell thickness and their growth was lower than C. gigas. In addition, C. angulata was still affected by the presence of the Iridovirus in France.
Tipo: Text
Palavras-chave: TBT; Breeding trials; Hubrids; Crassostrea gigas; Crassostrea angulata; TBT; Chambrage; Croisement; Hybrides; Crassostrea gigas; Crassostrea angulata.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-3102.pdf

Comparative study of shell shape and muscle scar pigmentation in the closely related cupped oysters Crassostrea angulata, C. gigas and their reciprocal hybrids
Provedor de dados: 5
Autores: Batista, Frederico; Ben-hamadou, Radhouan; Fonseca, Vera; Taris, Nicolas; Ruano, Francisco; Reis-henriques, Maria; Boudry, Pierre.
The taxonomic status of the cupped oysters Crassostrea angulata and C. gigas has received considerable attention in the last decades. Based on larval shell morphology, experimental hybridization, allozymes and nuclear DNA studies several authors have considered these two taxa as being synonymous. However, mitochondrial data showed clear genetic differences between the two taxa. In addition, microsatellite-based studies and cytogenetic studies have also provided evidence that supports their differentiation. Considerable differences have also been observed at the phenotypic level in terms of growth rate and ecophysiological parameters. In the present study, C. angulata from Sado estuary (Portugal) and C. gigas from Seudre estuary (France) were collected and...
Tipo: Text
Palavras-chave: Crassostrea gigas; Crassostrea angulata; Hybridization; Shell pigmentation; Shell morphology.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3904.pdf

Etude comparative de la croissance et de l'activité écophysiologique des huîtres creuses Crassostrea gigas, Crassostrea angulata et des hybrides
Provedor de dados: 5
Autores: Haure, Joel; Huvet, Arnaud; Palvadeau, Hubert; Nourry, Max; Penisson, Christian; Boudry, Pierre; Martin, Jean-louis.
A comparative study of the growth performances in cupped oysters Crassostrea gigas, Crassostrea angulata and their hybrids was conducted from March to October 1999 in a controlled farm with phytoplankton (Skeletonema costatum) input. The individuals, of the same age, were from genitors which had been identified through a marker analysis of the mitochondrial genome (Boudry et al, 1998). As a consequence, two pure offspring were obtained through the crossing of Portuguese oyster C. angulata (AA) genitors and the crossing of Japanese oyster C. gigas (GG) genitors. Two other offsprings were produced through the hybrid crossing of C. gigas female genitors with C. angulata (GA) male genitors on one hand, and C. angulata female genitors with C. gigas (AG) male...
Tipo: Text
Palavras-chave: Géniteur; Génétique; Performances croissance; Crassostrea gigas; Crassostrea angulata; Huîtres.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/acte-3281.pdf

Application des techniques moléculaires de PCR-RFLP et de PCR-RFLP-SSCP dans l'étude de la différenciation génétique de deux huîtres creuses : Crassostrea gigas et Crassostrea angula
Provedor de dados: 5
Autores: Dufourg, Cecile.
Les 2 taxons d'huîtres creuses C. angulata et C. gigas n'étant pas différenciables sur des critères morphologiques, écologiques ou physiologiques, l'étude de leur passé évolutif fait appel à l'utilisation de marqueurs génétiques. L'étude du polymprohisme des séquences mitochondriales codant pour la sous-unité I de la cytochrome oxydase par la technique de PCR-RFLP a été réalisée sur 197 individus appartenant à 5 populations d'origine géographique différente, de type Crassostrea angulata ou Crassostrea gigas. Elle a permis la construction d'un arbre représentant les relations phylogénétiques entre ces populations. Cet arbre a été comparé à celui établi à partir de l'analyse de 3 marqueurs microsatellites. Les résultats de ces 2 analyses sont similaires et...
Tipo: Text
Palavras-chave: Huître creuse; Crassostrea angulata; Crassostrea gigas; Génétique; Polymorphisme; ADN; SSCP; Biologie moléculaire.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00033/14415/11709.pdf

Comportement de Crassostrea angulata Lmk. sous des conditions experimentales de milieu. Resistance aux basses salinites.
Provedor de dados: 5
Autores: His, Edouard.
Portuguese oysters, C. angulata from brood ponds at Arcachon (salinity 27-28ppt) were exposed to lowered salinities and their valve activity continuously recorded. Down to 2 ppt, normal activity was resumed within 24 hours, between 8 and 11%, oysters, survived and adapted slowly, below 8%, oysters died. Sexually mature oysters are more susceptible and may die at 10 to 8% salinity, perhaps because the gonad is full of gametes. Oysters from different localities probably respond differently to changed salinity.
Tipo: Text
Palavras-chave: Arcachon; Salinities; Crassostrea angulata; Portuguese oysters.
Ano: 1972
URL: http://archimer.ifremer.fr/doc/1972/publication-2053.pdf

Rapport sur l'activité du Laboratoire de La Tremblade - Année 1958
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire ISTPM de La Tremblade concernant l'année 1958
Tipo: Text
Palavras-chave: Conchyliculture; Rapport d'activité; Météorologie; Parasite; Mortalité; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1958
URL: http://archimer.ifremer.fr/doc/00069/18071/15615.pdf

Evidence for natural hybrtidisation between the two oyster sub-species Crassostrea gigas and Crassostrea angulata in Southern Europe
Provedor de dados: 5
Autores: Boudry, Pierre; Huvet, Arnaud; Fabioux, Caroline; Lapegue, Sylvie.
Crassostrea angulata and Crassostrea gigas, two cupped oyster taxa of Asian origin (O'Foighil et al, 1998), were successively introduced into Europe  during the XVIth  and the XXth century respectively (Héral and Grizel, 1991). To date, populations presumed to be C. angulata remain only in the south of Spain and Portugal, while the geographic range of C. gigas is expending, notably due to aquaculture. The two taxa can be distinguished by RFLP analysis of the mitochondrial Cytochrome Oxydase I locus (COI).  This marker revealed strong genetic differentiation between Asian populations of the two taxa (Boudry et al., 1998). In contrast, nuclear markers showed a much lower genetic differentiation (Huvet et al, in press). The absence of any reproductive barrier...
Tipo: Text
Palavras-chave: Microsatellite; Genetic; Crassostrea angulata; Crassostrea gigas; Oysters.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/acte-3453.pdf

Rapport sur l'activité du laboratoire de La Tremblade - Année 1966
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire ISTPM (Institut Scientifique et Technique des Pêches Maritimes) de La Tremblade année 1966
Tipo: Text
Palavras-chave: Rapport activité; Conchyliculture; Hydrologie; Mortalité; Météorologie; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1966
URL: http://archimer.ifremer.fr/doc/00069/18048/15590.pdf

Oyster population genetics : understanding natural populations and tracing introductions
Provedor de dados: 5
Autores: 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

Deux cas d'affection massive par la maladie des branchies observés sur les huîtres portugaises, Crassostrea angulata Lmk. élevées en suspension dans le Bassin d'Arcachon
Provedor de dados: 5
Autores: Deltreil, Jean-pierre.
Marteil, en 1968, a fait état de la présence, des manifestations et des problèmes posés par l'existence de la maladie des branchies dans la plupart des centres ostréicoles français. Rappelons que la découverte dans le bassin d'Arcachon des premiers sujets présentant des anomalies dans la morphologie des feuillets branchiaux remonte au mois de février 1967. Au cours des mois suivants le pourcentage de tels individus devait croître rapidement. Dès le printemps et pendant tout l'été une mortalité excessive affectait gravement les élevages arcachonnais.
Tipo: Text
Palavras-chave: Pathologie; Maladie; Crassostrea angulata; Huîtres; Bassin Arcachon; Branchies.
Ano: 1969
URL: http://archimer.ifremer.fr/doc/00010/12118/8844.pdf

New insights about the introduction of the Portuguese oyster, Crassostrea angulata, into the North East Atlantic from Asia based on a highly polymorphic mitochondrial region
Provedor de dados: 5
Autores: Grade, Ana; Chairi, Hicham; Lallias, Delphine; Power, Deborah M.; Ruano, Francisco; Leitao, Alexandra; Drago, Teresa; King, Jonathan W.; Boudry, Pierre; Batista, Frederico M.
It is commonly presumed that the Portuguese oyster Crassostrea angulata was introduced into the North East (NE) Atlantic from Asia. The analysis of the nucleotide sequence of a highly polymorphic non-coding mitochondrial region (major noncoding region - MNR) of C. angulata samples collected in Europe (Portugal), Africa (Morocco) and Asia (Shantou and Taiwan) provided new insight into the introduction of this species into the NE Atlantic. Sixty haplotypes and a nucleotide diversity of 0.0077 were observed in 130 analyzed sequences. Higher nucleotide diversity levels were observed in NE Atlantic sites than in Asian sites and significant genetic differentiation was found between the two. Our results suggest that C. angulata might have been introduced to the...
Tipo: Text
Palavras-chave: Crassostrea angulata; Phylogeography; Genetic signature; Biological invasions.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00371/48200/48316.pdf

Rapport sur l'activité du service du contrôle sanitaire des coquillages pendant l'année 1951 - La Tremblade
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport d'action du service du contrôle sanitaire des coquillages pendant l'année 1951 du Laboratoire ISTPM de La Tremblade
Tipo: Text
Palavras-chave: Contrôle sanitaire; Rapport d'activité; Ostréiculture; Reproduction; Parasite; Crassostrea angulata; Mytilus edulis; Ostrea edulis; Marennes Oléron.
Ano: 1951
URL: http://archimer.ifremer.fr/doc/00069/18062/15606.pdf

Comparative analysis of oxygen consumption rates between cupped oyster spat of Crassostrea gigas of French, Japanese, Spanish and Taiwanese origins
Provedor de dados: 5
Autores: Goulletquer, Philippe; Wolowicz, Maciej; Latala, Adam; Geairon, Philippe; Huvet, Arnaud; Boudry, Pierre.
Respiration rates of various geographical strains of Crassostrea gigas were compared to assess the respiratory expenditure as a physiological indicator of catabolism (cost of maintenance). Parental oysters, sampled in France (Marennes-Oleron), Japan (Hiroshima), Taiwan (Tunkang) and Spain (Cadix), were differentiated by both their geographic origin and by mitochondrial DNA markers, allowing the distinction between the two closely related taxa Crassostrea gigas and Crassostrea angulata. After reproduction of these parental oysters, respiration rates of spat of each strain, reared under common controlled conditions, were individually estimated at 20 degrees C by using a volumetric microrespirometer. Our results demonstrated that physiological variability...
Tipo: Text
Palavras-chave: Pacific Ocean; NE Atlantic; Oyster strains; Hybrids; Crassostrea angulata; Crassostrea gigas; Metabolism; Respiration rates; Océan Pacifique; Atlantique NE; Souches génétiques; Hybrides; Crassostrea angulata; Crassostrea gigas; Métabolisme; Taux de respiration.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-859.pdf

Etude préliminaire de l'acide désoxyribonucléique (ADN) d'huîtres du littoral atlantique français
Provedor de dados: 5
Autores: Gras, Marie-paule.
The mortality that decimated Portuguese oysters, C. angulata, in 1970-1971, up to 80% in most sectors, required the introduction of C. gigas oysters resistant to disease and whose reproduction proved itself to be excellent (GRAS and assoc. 1971). Artificial beds of Pacific oysters were created. Nonetheless, in some areas, there continued to be small populations of C. angulata that, mixed in with the C. gigas oysters that had been brought in, participated in reproduction. Genetic problems then arose, among which the selection of specimens and hybridisation were to be considered more specifically. There are, in fact, two cases of hybridisation.
Tipo: Text
Palavras-chave: Génétique; Hybridation; Huîtres; Crassostrea angulata; Crassostrea gigas.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/acte-2987.pdf

Quelques observations sur la condition des huîtres portugaises (Crassostrea angulata LmK), dans le bassin d'Arcachon, les ruissellements des eaux qui draînent l'arrière-pays, la présence de sels de fer et un phénomène de coloration
Provedor de dados: 5
Autores: Le Dantec, Jean.
Nous avons précédemment montré que des diminutions du rendement ostréicole pouvaient être consécutives à des périodes de sécheresse, que les ruissellements dans la baie n'étaient massifs que de novembre à mai inclus par suite des variations du niveau de la nappe phréatique; que les fortes pluies de l'hiver 1960-61 avaient eu pour conséquences d'importants apports d'alluvions et la réapparition sur les terrains ostréicoles d'une couche de vase superficielle appelée localement « barotte », où pullulait une flore benthique très riche, et une revigoration momentanée de l'huître portugaise. Ces constatations nous ont incité à comparer au cours des années dernières l'évolution des chutes météoriques pendant la période novembre-mai et les fluctuations de la...
Tipo: Text
Palavras-chave: Crassostrea angulata; Sel de fer; Mortalité; Pollution; Impact.
Ano: 1966
URL: http://archimer.ifremer.fr/doc/00039/15068/12402.pdf

The taxonomic status and origin of the Portuguese oyster Crassostea angulata (Lamark, 1819)
Provedor de dados: 5
Autores: Batista, Frederico; Leitao, Alexandra; Huvet, Arnaud; Lapegue, Sylvie; Heurtebise, Serge; Boudry, Pierre.
The taxonomic status of the Portuguese oyster Crassostrea angulata and the Pacific oyster Crassostrea gigas has often been a matter of controversy. Based on larval shell morphology, experimental hybridisation and electrophoretic studies of enzyme polymorphism several authors have considered these two species as being synonymous. During the recent years, several genetic studies based on mitochondrial DNA and microsatellites data have provided evidences that the two taxa are genetically distinct although closely related. Furthermore, karyotype analyses have also highlighted the close genetic similarity of these taxa in comparison with other cupped oyster species. However, a comparative analysis of restriction enzymes ideograms revealed differences between...
Tipo: Text
Palavras-chave: Geographical origin; Phylogenetic; Genetic; Taxonomic status; Crassostrea angulata; Oyster.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3433.pdf

Rapport sur l'activité du Laboratoire de La Tremblade - Biologie conchylicole - Année 1954
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire ISTPM de La Tremblade, biologie conchylicole : année 1954
Tipo: Text
Palavras-chave: Conchyliculture; Rapport d'activité; Météorologie; Parasite; Mortalité; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1954
URL: http://archimer.ifremer.fr/doc/00069/18066/15609.pdf

Rapport sur l'activité du Laboratoire de La Tremblade - Année 1957
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire ISTPM de La Tremblade concernant l'année 1957
Tipo: Text
Palavras-chave: Conchyliculture; Rapport d'activité; Météorologie; Parasite; Mortalité; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1957
URL: http://archimer.ifremer.fr/doc/00069/18069/15613.pdf

Infections virales chez les huîtres Crassostrea angulata Lmk. et Crassostrea gigas Th.
Provedor de dados: 5
Autores: Comps, Michel; Duthoit, Jean-louis.
Two viral infections associated to some epizooties have been observed in Crassostrea angulata Lmk. The first one concerns the Gill disease in which the viral damages go hand in hand with a cellular hypertrophy, while, in the second one, the contaminated cells are associated with a deterioration of the connective tissue. These branchial necrosis associated to a virus have been observed again recently in some Portuguese oysters from the natural deposits of the Cadix (Spain) area. Moreover, the study of the summer mortalities (July 1977) in the oyster Crassostrea gigas Th. demonstrated the presence in this species of a virus of the same type as the one associated to the massive mortalities of the Portuguese oyster. In both cases, the viral morphogenesis takes...
Tipo: Text
Palavras-chave: Oyster; Crassostrea gigas; Crassostrea angulata; Pathology; Virus; Huître; Crassostrea gigas; Crassostrea angulata; Pathologie; Virologie.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-5922.PDF

Activite mecanique comparee des huitres portugaises et des Ciones, Epibiontes.
Provedor de dados: 5
Autores: Le Borgne-david, A.
The Portuguese oyster (Crassostrea angulata) and the sea-squirt Ciona intestinalis are both filter-feeders and compete for space in the oyster beds. Valve movement in oysters and shortening and elongation in Ciona were recorded on a smoked drum. Oysters showed a slow (3 one half min) spontaneous opening/closing rhythm, which was speeded up by stimulatory (vitamin) substances and increased in amplitude by toxic accumulated waste substances, or sudden change in temperature. Ciona showed a regular contraction rhythm of similar to 1 min and single sharp shortening after a strong light stimulus or a food particle touch stimulus to the oral tentacles. The neural ganglion discharges spikes 3 times faster than in the dark, after light stimulation. Filtration rates...
Tipo: Text
Palavras-chave: Stimulation; Rhythm; Temperature; Crassostrea angulata; Portuguese oyster.
Ano: 1972
URL: http://archimer.ifremer.fr/doc/1972/publication-2052.pdf

Caractérisation sur estran des performances de croissance, maturation et survie des deux-taxons d'huîtres creuses C. gigas et C. angulata, hybrides et "exotiques"
Provedor de dados: 5
Autores: Soletchnik, Patrick; Huvet, Arnaud; Le Moine, Olivier; Razet, Daniel; Geairon, Philippe; Goulletquer, Philippe; Faury, Nicole.
This study presents the zootechnical performances in their natural habitat, the Marennes Oléron Bay, of two Crassostrea gigas and Crassostrea angulata taxons of European and Asian origin, as well as those of their "European" hybrids (6 studied strains). Growth performance seems to be a phenotypic characterisation linked with the maternal origin (c. gigas or C. angulata). The Asian "pure gigas" or "pure angulata" strains' growth performances differ more from those of their European "sisters" than the European taxons with their hybrids. The C. angulata strain, of Taiwanese origin, does not survive the second culture week in the Marennes Oléron Bay. The C. angulata strain seems to "carry" a strong mortality potential. After 6 months of off-bottom culture, the...
Tipo: Text
Palavras-chave: Survie; Performance croissance; Hybrides; Zootechnie; Crassostrea angulata; Crassostrea gigas; Huîtres.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/acte-3382.pdf

Rapport sur l'activité du laboratoire de La Tremblade - Année 1969
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire ISTPM (Institut Scientifique et Technique des Pêches Maritimes) de La Tremblade année 1969
Tipo: Text
Palavras-chave: Rapport activité; Conchyliculture; Hydrologie; Mortalité; Météorologie; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1969
URL: http://archimer.ifremer.fr/doc/00069/18051/15593.pdf

Différenciation génétique de deux huîtres creuses Crassostrea gigas et Crassostrea angulata : apport des marqueurs microsatellites
Provedor de dados: 5
Autores: Huvet, Arnaud.
Les définitions taxonomiques de Crassostrea angulata et Crassostrea gigas font l'objet de controverses. Les similitudes morphologiques et physiologiques ainsi que l'homogénéité des fréquences allozymiques entre populations des deux taxons orientent les auteurs vers un regroupement au sein d'une seule espèce. Récemment, une étude basée sur l'analyse par RFLP de l'ADN mitochondrial a révélé des différences permettant de distinguer C. angulata et C. gigas. La caractérisation par 4 marqueurs microsatellites de 12 populations des 2 taxons révèlent les points suivants : des déficits en hétérozygotes sont observés dans l'ensemble des populations, l'analyse de la variabilité inter-populations montre l'existence d'une structuration, l'analyse des distances...
Tipo: Text
Palavras-chave: Crassostrea gigas; Crassostrea angulata; Microsatellites; Différenciation.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00033/14377/11667.pdf

Ressources génétiques chez l'huître creuse Crassostrea gigas : variabilité, différenciation et adaptation aux conditions de production en Charente-Maritime - Année 1999
Provedor de dados: 5
Autores: Huvet, Arnaud.
Dans ce présent travail, nous proposons d' étudier la variabilité génétique de populations d' huîtres creuses C. Gigas au niveau mondial à l'aide de ces nouveaux marqueurs moléculaires. La reconnaissance de populations génétiquement distinctes étant désormais possible, les performances de certaines de ces populations dans les conditions locales d' élevage sont comparées. L'objectif sera ici d'identifier des populations plus performantes que celle actuellement en élevage. Pendant toute la durée du programme, la profession ostréicole représentée par la Section Régionale de la Conchyliculture de Marennes-Oléron sera tenue informée de l'évolution des résultats.
Tipo: Text
Palavras-chave: Génétique; Marqueur génétique; Croisement génétique; Huîtres creuses; Crassostrea gigas; Crassostrea angulata.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00044/15562/12950.pdf

Rapport sur l'activité du Laboratoire de La Tremblade - Année 1965
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire ISTPM (Institut Scientifique et Technique des Pêches Maritimes) de La Tremblade année 1965
Tipo: Text
Palavras-chave: Rapport activité; Conchyliculture; Hydrologie; Mortalité; Météorologie; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1965
URL: http://archimer.ifremer.fr/doc/00069/18047/15589.pdf

Microsatellite analysis of 6-hour-old embryos reveals no preferential intraspecific fertilization between cupped oysters Crassostrea gigas and Crassostrea angulata
Provedor de dados: 5
Autores: Huvet, Arnaud; Balabaud, K; Bierne, Nicolas; Boudry, Pierre.
Experimental examination of reproductive isolation is the first step in understanding li,hybridization processes. Here, we studied preferential fertilization between 2 cupped oyster taxa, Crassostrea angulata and Crassostrea gigas, as a potential prezygotic reproductive isolation. Early examination of sperm competition is now possible by molecular analysis of oyster embryos. This avoids the confounding effect of differential mortality during the larval stage. Six hundred embryos were sampled from 2 crosses. Three microsatellite loci were enough to determine without ambiguity the taxa of contributing sires of embryos. No evidence of preferential fertilization between gametes from the same taxa was shown. A significantly higher contribution of the C. gigas...
Tipo: Text
Palavras-chave: Paternal contribution; Microsatellites; In vitro crossings; Hybridization; Crassostrea angulata; Crassostrea gigas.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-436.pdf

Hybridization and morphological differences between the two closely related oyster taxa Crassostrea angulata and C. gigas
Provedor de dados: 5
Autores: Batista, Frederico; Fonseca, Vera; Ben-hamadou, Radhouan; Taris, Nicolas; Henriques, Maria; Boudry, Pierre.
Unlike in some crops, no large heterotic effects have been observed in most farmed animals. Interestingly, significant hybrid vigour for some traits has been reported in the Pacific oyster, Crassostrea gigas. Crossbreeding between closely related taxa can be seen as an efficient way to exploit the dominance component of the genetic variance of a trait. Factorial crosses between the Portuguese oyster C. angulata (from Sado estuary, Portugal) and C. gigas (from Seudre estuary, France) were done to evaluate the aquaculture potential of hybrids. Juveniles of the different progenies were reared in Ria Formosa (Portugal) under usual farming conditions. The genetic confirmation of all progenies was done using mitochondrial and nuclear markers in order to detect...
Tipo: Text
Palavras-chave: Hybridization; Crassostrea angulata; Crassostrea gigas; Genetic; Oyster.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3429.pdf

Performances zootechniques des deux taxons Crassostrea gigas, Crassostrea angulata et de leurs hybrides dans des conditions d'élevage traditionnel dans le bassin de Marennes Oléron (France)
Provedor de dados: 5
Autores: Soletchnik, Patrick; Huvet, Arnaud; Le Moine, Olivier; Razet, Daniel; Geairon, Philippe; Faury, Nicole; Robert, Stephane; Goulletquer, Philippe.
This study presents the zootechnical performances in their natural habitat, the Marennes Oléron Bay, of two Crassostrea gigas and Crassostrea angulata taxons of European and Asian origin, as well as those of their "European" hybrids (6 studied strains). Growth performance seems to be a phenotypic characterisation linked with the maternal origin (c. gigas or C. angulata). The Asian "pure gigas" or "pure angulata" strains' growth performances differ more from those of their European "sisters" than the European taxons with their hybrids. The C. angulata strain, of Taiwanese origin, does not survive the second culture week in the Marennes Oléron Bay. The C. angulata strain seems to "carry" a strong mortality potential.
Tipo: Text
Palavras-chave: Performance croissnce; Hybrides; Zootechnie; Crassostrea angulata; Crassostrea gigas; Huîtres.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/acte-3283.pdf

A la recherche de l'huître portuguaise: identification de marqueurs moléculaires discriminant Crassostrea angulata et Crassostrea gigas
Provedor de dados: 5
Autores: Cornette, Florence.
L'étude historique de l'ostréiculture française monte que cette activité est caractérisée par des périodes de prospérités et de pénurie. Des épizooties ont été à l'origine de ces alternances. A chacune de ces période, on a pu constater des changements d'espèces : Ostrea edulis fut remplacée par Crassostrea angulata, de même celle-ci fut remplacée par Crassostrea gigas dans les années 1970. L'étude de la bibliographie montre que les techniques utilisées pour distinguer des espèces Crassostrea angulata et Crassostrea gigas sont insuffisantes. L'évolution des technologies en matière d'analyses génétiques ouvrent de nouvelles perspectives. La recherche de marqueurs moléculaires réalisée sur Crassostrea angulata et Crassostrea gigas, par amplification par PCR...
Tipo: Text
Palavras-chave: Crassostrea angulata; Crassostrea gigas; Marqueurs moléculaires; ADN mitochondrial; PCR; Enzymes de restrictions; Haplotypes.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00049/15979/13421.pdf

First study in cryopreserved Crassostrea angulata sperm
Provedor de dados: 5
Autores: Riesco, Marta F.; Felix, Francisca; Matias, Domitilia; Joaquim, Sandra; Suquet, Marc; Cabrita, Elsa.
Sperm cryopreservation is a widely employed technique that promotes alternative techniques to contribute to broodstock management or restoration programs for species of commercial interest, endangered species or species with an interesting genotype. The preservation of genetic material from improved stocks or from the original population is extremely important for the oyster aquaculture industry to prevent the potential impacts of epidemic diseases and natural disasters. The Portuguese oyster, Crassostrea angulata, was the most important species commercialized by the shellfish industry. However, inadequate management of this industry and pathology occurrences resulted in a significant decrease in natural populations. For this reason, in this work a...
Tipo: Text
Palavras-chave: Crassostrea angulata; Sperm; Cryopreservation; Motility; Viability; Fertilization.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00333/44432/44098.pdf

Infection virale associée à la "maladie des branchies" de l'huître portugaise Crassostrea angulata LmK
Provedor de dados: 5
Autores: Comps, Michel; Duthoit, Jean-louis.
Some particles and viral damages linked to a strong cellular hypertrophy have been observed in the branchial necrosis of some Portuguese oysters contaminated by the Gill disease. The structure and development of the virions, as well as the cellular alteration, are studied by electron microscopy.
Tipo: Text
Palavras-chave: Crassostrea angulata; Huître; Pathologie; Virologie.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/publication-5920.PDF

Virose de l'huître portugaise
Provedor de dados: 5
Autores: Comps, Michel.
Tipo: Text
Palavras-chave: Virose; Crassostrea angulata; Crassostrea gigas; Etiologie; Prophylaxie et traitement; Histopathologie; Virosis; Crassostrea angulata; Crassostrea gigas; Etiology; Control; Histopathology.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00140/25076/23182.pdf

Evolution de la mortalité des huîtres portugaises C. angulata dans le bassin de Marennes
Provedor de dados: 5
Autores: Comps, Michel; Gras, Paul.
A year after the end of the Gill disease which heavily struck the Portuguese oysters Cassostrea angulata Lmk. (Marteil, 1968), a new disease whose causes are still unexplained caused a massive mortality in the same species in the summer of 1970 (Comps, 1972). It can be considered, in 1973, that the successive losses lead to the quasi-extinction of the species C. angulata in the farms of the Marennes basin, since, contrary to what has been done in the case of the Malpèque disease in Canada, the indigenous specious was replaced by another species, the Pacific oyster Crassostrea gigas Thunberg.
Tipo: Text
Palavras-chave: Marennes Oléron; Huîtres; Mortalité; Crassostrea angulata.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/acte-5927.PDF

Mitochondrial and nuclear DNA phylogeography of Crassostrea angulata, the Portuguese oyster endangered in Europe
Provedor de dados: 5
Autores: Huvet, Arnaud; Lapegue, Sylvie; Magoulas, A; Boudry, Pierre.
The respective status of the Portuguese oyster, Crassostrea angulata, and the Pacific oyster, Crassostrea gigas, has long been a matter of controversy. Morphological and physiological similarities, homogeneity of allozyme allelic frequencies between populations of the two taxa and the demonstration of hybridization lead most authors to suggest that they should be regrouped within the same species. The risk of introgression and the present expansion of C. gigas aquaculture in Europe raises the question of the need for preservation of C. angulata in Europe, as only a few populations remain. We studied European and Asian populations of C. gigas and C. angulata using microsatellite and mitochondrial DNA markers to estimate their genetic diversity and...
Tipo: Text
Palavras-chave: Phylogeography; Population genetics; Microsatellites; Crassostrea gigas; Crassostrea angulata.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/2000/publication-707.pdf

La mise en évidence d'une infection virale chez l'huître portugaise à l'occasion de l'épizootie de 1970-1974
Provedor de dados: 5
Autores: Comps, Michel; Bonami, Jean-robert; Vago, C.; Razet, Daniel.
Among the major epizootics known in marine Molluscs, the one that started on the coasts of Europe in 1970 in the Portuguese oyster, Crassostrea angulata, was certainly one of the largest due to its range and due to the economic loss sustained by the French oyster farming as a whole. It led to the disappearance of the species C. angulata as a farmed oyster, and to the massive introduction of the Japanese oyster, C. gigas, known to be resistant to the disease. From the first manifestations of this epizootic, the laboratories of the ISTPM were actively dedicated to its etiology. Now, after several years, a study begun at the La Tremblade laboratory has just been completed.
Tipo: Text
Palavras-chave: Marennes Oléron; Mortalités; Histologie; Epizootie; Crassostrea angulata.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/publication-2995.pdf

Saisonnalité de ponte de Crassostrea gigas et Crassostrea angulata dans le bassin de Marennes-Oléron. Un demi siècle de résultats : 1950-2000. La différence dans la saison de ponte reflète-t-elle une différence entre taxons ou l'évolution climatique ?
Provedor de dados: 5
Autores: Soletchnik, Patrick.
The Marennes-Oléron Bay on the Atlantic coast is a major oyster culture centre in France. 40 000 tonnes of cupped oysters are produced there each year. The two taxa C. angulata and C. gigas have been cultured in turn over the last century. Since 1950, larvae have been captured between June and September in the southern part of the Bay, near the mouth of the Seudre River, the traditional oyster spat capture zone. This historical database shows that the frequency of larvae capture is defined by three to four peaks in larvae emission in C. angulata and only two peaks for C. gigas during a single season. Seventeen years of data on C. angulata between 1950 and 1969 and 27 years for C. gigas between 1972 and 2000 demonstrate that the beginning of the spawning...
Tipo: Text
Palavras-chave: Crassostrea angulata; Crassostrea gigas; Marennes Oléron bassin; Pertuis Charentais; Environnement; Huître creuse; Reproduction.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2008/rapport-4126.pdf

Past and present geographical distribution of populations of Portuguese (Crassostrea angulata) and Pacific (C. gigas) oysters along the European and north African Atlantic coats
Provedor de dados: 5
Autores: 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

Sur la présence d'Hexamita chez O. edulis et C. angulata des côtes françaises
Provedor de dados: 5
Autores: 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

Evolution et conséquences de la mortalité de C. angulata dans le bassin d'Arcachon et l'estuaire de la Gironde de 1971 à 1973
Provedor de dados: 5
Autores: 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

Rapport sur l'activité du laboratoire de La Tremblade - Année 1964
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport d'activité du Laboratoire ISTPM (Institut Scientifique et Technique des Pêches Maritimes) de La Tremblade
Tipo: Text
Palavras-chave: Rapport activité; Conchyliculture; Hydrologie; Mortalité; Météorologie; Reproduction; Claire ostréicole; Ostrea edulis; Crassostrea angulata; Mytilus edulis.
Ano: 1964
URL: http://archimer.ifremer.fr/doc/00069/18046/15588.pdf

Evidence for the presence of the Portuguese oyster, Crassostrea angulata, in northern China
Provedor de dados: 5
Autores: 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

Mitochondrial and nuclear DNA phylogeography of  two cupped oysters Crassostrea gigas and Crassostrea angulata
Provedor de dados: 5
Autores: 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

Observations sur la résistance d'huîtres du genre Crassostrea au cours de la mortalité massive de 1970-1971 dans le bassin de Marennes-Oléron
Provedor de dados: 5
Autores: Comps, Michel.
Depuis plusieurs années on a constaté une baisse sensible de la productivité dans l'exploitation des parcs et claires à huîtres du bassin de Marennes-Oléron. En outre l'huître portugaise (Crassostrea angulata Lmk) élevée dans cette zone ostréicole devait subir en 1966 et 1967 les effets de la maladie des branchies qui entraîna des pertes appréciables (Franc &amp; Arvy, 1970). Au cours de l'été 1970, parallèlement à des perturbations dans la reproduction, s'amorça une mortalité massive qui au printemps 1971 affectait environ 70% du cheptel.
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Crassostrea angulata; Crassostrea gigas; Physiologie; Pathologie; Mortalité; Marennes Oléron; Charente Maritime.
Ano: 1972
URL: http://archimer.ifremer.fr/doc/00009/11980/8684.pdf

Rapport sur l'activité du Laboratoire de La Tremblade - Année 1959
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport sur l'activité du Laboratoire ISTPM de La Tremblade concernant l'année 1959
Tipo: Text
Palavras-chave: Conchyliculture; Rapport d'activité; Météorologie; Parasite; Mortalité; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1959
URL: http://archimer.ifremer.fr/doc/00069/18072/15616.pdf

Une virose de l'huître portugaise (Crassostrea angulata LMK)
Provedor de dados: 5
Autores: Comps, Michel; Bonami, Jean-robert; Vago, Constantin.
Une infection virale a été observée chez les Huîtres portugaises Crassostrea angulata durant les mortalités massives de 1970-1973. Un type nouveau de virus et la morphogenèse virale sont décrits. Il s'agit du premier virus signalé chez les huîtres, mis en relation avec une épizootie de ce mollusque de ce mollusque économiquement très important.
Tipo: Text
Palavras-chave: Pathologie; Virologie; Mollusques bivalves; Crassostrea angulata.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/00087/19820/17462.pdf

Etat actuel de l'introduction d'organismes marins non-indigènes
Provedor de dados: 5
Autores: Marteil, Louis.
Le présent rapport fera le point sur les introductions d'organismes marins non-indigènes effectuées en France depuis 1971, en se référant au questionnaire qui a servi de base à l'établissement du rapport initial.
Tipo: Text
Palavras-chave: Introduction espèces; Crassostrea gigas; Crassostrea angulata; Crassostrea rhizophorae; Homarus americanus; Homarus vulgaris; Pseudostylochus; Undaria pinnatifida.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/00021/13217/10277.pdf

"Gill disease" of Portuguese Oysters
Provedor de dados: 5
Autores: 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

Natural hybridization between genetically differentiated populations of Crassostrea gigas and C-angulata highlighted by sequence variation in flanking regions of a microsatellite locus
Provedor de dados: 5
Autores: 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

A "G" chromosome banding study of three cupped oyster species : Crassostrea gigas, Crassostrea angulata and Crassostrea virginica (Mollusca : Bivalvia)
Provedor de dados: 5
Autores: Leitao, Alexandra; Thiriot-quievreux, Catherine; Malheiro, Isabel; Boudry, Pierre.
The G-banding technique was performed on chromosomes from gill tissue of three cupped oyster species : Crassostrea gigas, Crassostrea angulata and Crassostrea virginica. Identification of the ten individual chromosome pairs was obtained. Comparative analysis of G-banded karyotypes of the three species showed that their banding patterns generally resembled each other, with chromosome pair 3 being similar in all three species. However, differences from one species to another were also observed. The G-banding pattern highlighted greater similarities between C. gigas and C. angulata than between these two species and C. virginica, thus providing an additional argument for genetic divergence between, these two evolutionary lineages. C. gigas and C. angulata...
Tipo: Text
Palavras-chave: Crassostrea virginica; Crassostrea angulata; Crassostrea gigas; G banding; Chromosome.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-2736.pdf

Programme 3 : Gestion durable des productions ostréicoles : les apports de la génétique. Convention 2000 RPC-A-530 Ifremer - Région Poitou-Charentes
Provedor de dados: 5
Autores: 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

Un dispositif simple permettant d'étudier le comportement des huîtres. Exemple d'application: comportement de Crassostrea angulata LmK. aux basses salinités
Provedor de dados: 5
Autores: 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

Using a satellite DNA family for species identification of commercial oysters
Provedor de dados: 5
Autores: Lopez-flores, I.; De La Herran, R.; Garrido-ramos, M. A.; Boudry, Pierre; Ruiz-rejon, C.; Ruiz-rejon, M.
The cultivation of oyster presents some problems related with the identification and differentiation of species as Ostrea edulis (European flat oyster) with respect to Ostrea stentina (Provence oyster) or Crassostrea angulata (portuguese oyster). Crossostrea gigas (Pacific oyster). We have characterized a satellite DNA family and used it as a molecular marker for genetic differentiation between commercial and non-commercial oyster species present in Europe. This marker clearly supports a high degree of differentiation between O. edulis and O. stentina and conversely upholds the contention that C. gigas and C. angulata are the same species.
Tipo: Text
Palavras-chave: Satellite DNA; Ostres stentina; Ostrea edulis; Genetic; Crassostrea angulata; Crassostrea gigas; Oysters.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/acte-3484.pdf

Rapport sur l'activité du Laboratoire de La Tremblade - Année 1963
Provedor de dados: 5
Autores: Trochon, Pierre.
Rapport de l'activité du Laboratoire de La Tremblade concernant l'année 1963
Tipo: Text
Palavras-chave: Rapport activité; Conchyliculture; Hydrologie; Mortalité; Météorologie; Reproduction; Claire ostréicole; Crassostrea angulata; Ostrea edulis; Mytilus edulis; Marennes Oléron.
Ano: 1963
URL: http://archimer.ifremer.fr/doc/00069/18061/15605.pdf