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| Registros recuperados: 858 | |
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| Renault, Tristan; Allain, Gwenhael; Arzul, Isabelle; Chollet, Bruno; Cobret, Laetitia; De Decker, Sophie; Faury, Nicole; Ferrand, Sylvie; Francois, Cyrille; Garcia, Celine; Haffner, Philippe; Joly, Jean-pierre; Miossec, Laurence; Morga, Benjamin; Nicolas, Jean-louis; Omnes, Emmanuelle; Pepin, Jean-francois; Saulnier, Denis; Schikorski, David; Segarra, Amelie. |
| Abnormal mortality outbreaks occurred in the majority of Pacific oyster (Crassostrea gigas) producing areas in France in 2008 during the summer period. These outbreaks were usually sudden and severe (up to 100%) and affected essentially spat (oysters less than 1 year-old) and juveniles (12 to 18 month-old oysters). Crassostrea gigas was the single affected species Mortality outbreaks were first observed from mid May to mid June in Brittany, Vendée, Charente Maritime and Mediterranean coast A second episode of massive mortality events was reported at the end of June and the beginning of July. All oyster production sites were affected except some particular locations including Arcachon Bay and Brittany. Mortality occurred latter in Arcachon Bay in August.... |
| Tipo: Text |
Palavras-chave: Abnormal mortality; Oysters; Crassostrea gigas; Pathogens. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00014/12554/9420.pdf |
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| Taris, Nicolas; Ernande, Bruno; Mccombie, Helen; Boudry, Pierre. |
| The life histories of oysters in the genus Crassostrea, like those of most marine bivalves, are typified by high fecundity and low survival in nature. Rearing conditions in hatcheries however ensure optimized density, diet, and temperature. Hatcheries are becoming increasingly important for the production of juveniles in aquaculture, and their culture practices often include culling of slow growing larvae to reduce and synchronize the time taken to reach settlement. Because previous studies have found substantial genetic variation for early life developmental traits in Crassostrea gigas, these culling practices are likely to cause highly different selective pressures in hatcheries from those in the natural environment. We studied the phenotypic and genetic... |
| Tipo: Text |
Palavras-chave: Oysters; Larvae; Hatchery; Genetic diversity; Culling; Crassostrea gigas. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1677.pdf |
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| Sauvage, Christopher; Bierne, N; Lapegue, Sylvie; Boudry, Pierre. |
| DNA sequence polymorphism and codon usage bias were investigated in a set of 41 nuclear loci in the Pacific oyster Crassostrea gigas. Our results revealed a very high level of DNA polymorphism in oysters, in the order of magnitude of the highest levels reported in animals to date. A total of 290 single nucleotide polymorphisms (SNPs) were detected, 76 of which being localised in exons and 214 in non-coding regions. Average density of SNPs was estimated to be one SNP every 60 bp in coding regions and one every 40 bp in non-coding regions. Non-synonymous substitutions contributed substantially to the polymorphism observed in coding regions. The non-synonymous to silent diversity ratio was 0.16 on average, which is fairly higher to the ratio reported in other... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Codon bias; Genetic diversity; SNP. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3417.pdf |
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| Thebault, Anne; Chollet, Bruno; Robert, Maeva. |
| La cellule de veille zoosanitaire de La Tremblade s'occupe de trois zones situées au sud de la Loire: la Baie de Bourgneuf, la région de Marennes-Oléron-Charentes, et le bassin d'Arcachon. Ces régions produisent principalement des huîtres creuses. Le naissain d'huîtres creuses produit à Arcachon et en Charente représente près de 80% de la production d'huître creuse, qui sera élevée dans toutes les régions ostréicoles françaises. Un effort particulier avec des prélèvements systématiques a donc été mis en place sur Crassostrea gigas dans ces trois trois zones, notamment sur les larves et le naissain d'Arcachon et de Charente. Compte tenu des transferts fréquents, des animaux sauvages sont prélevés pour caractériser les sites, tandis que la production en... |
| Tipo: Text |
Palavras-chave: Réseau surveillance; REPAMO; Analyses zoosanitaires; Huître creuse; Crassostrea gigas; Mortalités. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00134/24488/22513.pdf |
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| Soletchnik, Patrick; Le Moine, Olivier; Faury, Nicole; Razet, Daniel; Geairon, Philippe; Goulletquer, Philippe. |
| The summer mortality patterns was studied in 1996 on the Ronce-les-Bains oyster bank (175 ha), located on the southern part of the Bay Marennes-Oleron (Atlantic coastline). Studies on growth, sexual maturation, survival rates and environmental variables were compared at fifteen experimental sites (on- and off-bottom culture). After 7 months, cumulative mortality reached 8-19 and 23-33% for off-bottom and on-bottom culture, respectively which is significantly higher for the latter case. A seasonal mortality trend was noted, with a significant increase related to air temperature greater than 20 degrees C and with a significant pre-spawning glycogen catabolism. Based on soft tissue flesh growth results from both types of culture, several empirical models were... |
| Tipo: Text |
Palavras-chave: Atlantic Ocean; Crassostrea gigas; Mortality; Growth rates; Océan Atlantique; Crassostrea gigas; Mortalité; Croissance. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/publication-862.pdf |
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| His, Edouard; Robert, Rene. |
| "Il est impossible d'imaginer un lieu plus favorable à l'ostréiculture que le bassin d'Arcachon" (Yonge, 1950). En effet, l'huître indigène, Ostrea edulis, et l'espèce plus récemment introduite, Crassostrea gigas, peuvent s'y reproduire en abondant. Si l'exploitation de la première a pris fin à la suite de deux épizooties consécutives, la seconde est l'objet d'une culture intensive dont la production annuelle est d'environ 12 000 tonnes de mollusques commercialisés. Des anomalies ont sévi dans la baie, de 1977 à 1981, rendant les récoltes de naissain pratiquement sensibles aux facteurs d'agression, et ont même été proposées par Woelke (1967) comme matériel biologique, afin de tester la qualité des eaux en zone littorale. La technique des élevages larvaires... |
| Tipo: Text |
Palavras-chave: Bassin d'Arcachon; Crassostrea gigas; Larves; Température; Nutrition; Bioessais; Facteurs anthropiques. |
| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/00019/13055/10013.pdf |
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| Goulletquer, Philippe. |
| Fisheries and aquaculture are of major importance to the coastal communities throughout the Bay of Biscaye. Almost half of French fishermen rely on catches from the Bay which achieve and estimated first sale value of more than 525m annually. Moreover, emblematic species such as eels have an additional economic as weil as social value for coastal communities. Similarly, the main French shellfish rearing areas are located within the Bay of Biscaye. They contribute predominantly to the yearly spat (mussel & oyster) recruitment, used to sustain the entire French shellfish industry. These activities have a direct impact on ecosystem functioning and biodiversity. Meanwhile, drastic environmental changes have been reported over the last 30 years, including a... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Solea solea; Living resources; Ecosystem; Biodiversity; Impacts; Climate change. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/acte-3488.pdf |
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| Renault, Tristan. |
| L'Unité de Recherche en Pathologie et Immunologie Générales (Station IFREMER de La Tremblade) se propose dans le présent projet d'étudier le virus de type herpès observée chez les huîtres (pouvoir pathogène, conditions d'expression de l'infection, transmission, etc ... ) et de développer des réactifs permettant de réaliser un diagnostic rapide, sensible et fiable de l'infection qu'il occassionne. Les diagnostics proposés seront basés sur la détection directe du virus, soit au moyen de réactifs immunologiques spécifiques des antigènes viraux, soit par des techniques de biologie moléculaire permettant de détecter l'ADN viral (hybridation de sondes nucléiques et réaction PCR : Polymerase Chain Reaction). Ce projet, proposé sur une durée de trois années... |
| Tipo: Text |
Palavras-chave: Virus; Herpès; Pathogène; Purification; Herpesviridae; Crassostrea gigas. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00043/15447/12818.pdf |
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| Soletchnik, Patrick; Le Moine, Olivier; Goulletquer, Philippe; Geairon, Philippe; Razet, Daniel; Faury, Nicole; Fouche, Dominique; Robert, Stephane. |
| Oyster farming in France is a traditional activity. Each year, 60,000 tons of C. gigas are fattened before being sold. Present-day fattening techniques for improving oyster taste and colour and increasing the meat weight are not particularly reliable. To optimize the fattening process, large phytoplanktonic blooms were induced in ponds, then distributed in oyster ponds. Despite the variability of the autumn weather conditions, diatoms (Skeletonema costatum) have been successfully cultured in outdoor ponds. During neap tides (when no seawater replenishes the water in the oyster beds), between mid-October and mid-December 1996, the fattening index (the weight of the meat) was constant or increased by 10-15% when a supplement of algae of 380.000... |
| Tipo: Text |
Palavras-chave: Fattening process; Crassostrea gigas; Oyster farming; Marennes Oleron Bay. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-478.pdf |
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| Heral, Maurice; Bacher, Cedric; Razet, Daniel; Prou, Jean; Deslous-paoli, Jean-marc; De Pontual, Helene; Raillard, Olivier; Maestrini, Serge; Mornet, Francoise; Menesguen, Alain; Sautour, Benoit; Robert, Jean-michel. |
| Les termes du contrat passé entre le Fond de la Recherche et de la Technologie et l'IFREMER précisent qu ele programmer a pour objectif une gestion rationnelle du milieu conchylicole avec notamment une mise au point de modèles (voir notification de l'aide en annexe). Un premier modèle appelé modèle global par analogie avec les modèles de pêche met en évidence la limite de la capacité trophique du bassin de Marennes-Oléron pour les huîtres cultivées. Un modèle analytique avec un modèle physique simple permet dans un premier temps de développer un modèle de croissance des huîtres en fonction de la nourriture disponible et d'effectuer des simulations qui confirment l'influence du stock sur les performances de croissance des bivalves. Un troisième approche... |
| Tipo: Text |
Palavras-chave: Modèle production; Biomasse; Huître creuse; Crassostrea gigas; Modèle énergétique; Croissance; Modèle multiboîte; Marennes Oléron; Modèle trophique; Marennes Oléron. |
| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/00048/15908/13337.pdf |
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| Richard, Marion; Forget, Fabien; Mignucci, Alexandre; Mortreux, Serge; Le Gall, Patrik; Callier, Myriam; Weise, Am; Mckindsey, Cw; Bourjea, Jerome. |
| Bivalve predation by seabream has been observed worldwide and is a major concern for bivalve farmers. Farmed bivalve-seabream interactions must be better understood to ensure the sustainability of bivalve aquaculture. The objectives of this study were to characterize gilthead seabream Sparus aurata presence in a bivalve farm in Prevost Lagoon (Mediterranean Sea) using acoustic telemetry and to evaluate monthly losses of mussels Mytilus galloprovincialis and oysters Crassostrea gigas due to seabream predation over an 18 mo period inside the farm and at an unprotected experimental platform. Large (281 to 499 mm TL) seabream were more commonly detected in the bivalve farm than were small (200 to 280 mm TL) seabream. In contrast to small seabream, 90% of large... |
| Tipo: Text |
Palavras-chave: Shellfish culture; Sparus aurata; Size; Acoustic telemetry; Crassostrea gigas; Mytilus galloprovincialis; Oyster; Mussel. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00663/77515/79299.pdf |
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| Boudry, Pierre; Degremont, Lionel; Taris, Nicolas; Mccombie, Helen; Haffray, Pierrick; Ernande, Bruno. |
| The most significant genetic improvement for production of Pacific oyster (Crassastrea gigas) has been obtained through the breeding of triploids, especially since the development of tetraploids. Quantitative genetics studies suggest that significant gains, for disease resistance or for other traits of aquacultural interest, could be obtained using this approach. However, the limited extent of hatchery-propagation (versus natural recruitment) and/or various technical difficulties and biological characteristics of the species have slowed the development of selective breeding programs. Recently, in the USA, Australia and New Zealand, family-based selective breeding programs have been initiated to improve growth and yield. In Europe, where both natural and... |
| Tipo: Text |
Palavras-chave: Microsatellites; Quantitative genetic; Genetic variability; Crassostrea gigas; Oysters. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-2861.pdf |
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| Registros recuperados: 858 | |
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