Consulta: subjectFacets:"Ostrea edulis"
Registros recuperados: 225
Data/hora: 04/06/2024 04:35:44

Итоги изучения фауны симбионтов промысловых черноморских двустворчатых моллюсков
Provedor de dados: 13
Autores: Холодковская, Е. В.
Для Mytilus galloprovincialis, Ostrea edulis и Crassostrea gigas у черноморских берегов России, Украины, Румынии и Болгарии приведен список видов симбионтов и их ареалы. Установлено, что характер распространения симбионтов определяется экологическим типом биоты. Приведены новые данные по морфометрии трематоды Parvatrema duboisi и инфузорий Raabella helensis и Crebricoma carinata
Tipo: Journal Contribution
Palavras-chave: Симбионты; Паразиты; Mytilus galloprovincialis; Ostrea edulis; Crassostrea gigas; Черное море; Parasites; Symbionts; The Black Sea Symbionts Parasites Symbionts Parasites http://aims.fao.org/aos/agrovoc/c_7562 http://aims.fao.org/aos/agrovoc/c_5574.
Ano: 2003
URL: http://repository.ibss.org.ua/dspace/handle/99011/488

Comparaison de la croissance et de la mortalité de différentes familles et lignées d'huître plate Ostrea edulis en système intensif
Provedor de dados: 5
Autores: Baud, Jean-pierre; Le Bayon, Nicolas; Haure, Joel; Nourry, Max; Palvadeau, Hubert; Penisson, Christian; Naciri-graven, Yamama; Goyard, Emmanuel; Barre, Marc.
As of 1985, Ifremer set up a selection programme for resistance to the protozoan Bonamia ostreae in European flat oysters (Ostrea edulis). Two selection lines, L85 and L89, from the third and second generation, respectively, were produced with 17 and 21 different families. The experimental design also included a mixed line (L85 x L89) of seven families and a control line of five families from Quiberon broodstock maintained without selection pressure.
Tipo: Text
Palavras-chave: Croissance; Génétique; Huîtres plates; Ostrea edulis.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-3245.pdf

Identification de polymorphismes de gènes chez l'huître plate Ostrea edulis L. et variabilité au sein de populations européennes
Provedor de dados: 5
Autores: Chupeau, Gaelle.
Le but de ce travail était de rechercher des marqueurs non neutres afin de comparer ces données obtenues avec celles données par les marqueurs précédemment étudiés (marqueurs neutres ou supposés l'être à savoir microsatellites, enzymatique et mitochondriales). Dû à des soucis d'ADN extrait des populations qui avaient été étudiées jusqu'alors, il a fallu effectuer un nouvel échantillonnage de l'huître plate Européenne, Ostrea edulis, sur son aire de répartition. Nous avons donc analysé en plus du but majeur, les données microsatellites pour ces nouvelles populations de manière à avoir un jeu de données de marqueurs non neutres. Ces analyses ont ainsi complété l'arbre phylogénétique déjà existant, et ont confirmé dans une moindre mesure puisque tous les...
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Génétique des populations; Nucleotide Polymorphisme (SNP); Test de neutralisté; Microsatellites.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00033/14417/11712.pdf

A preliminary genetic linkage map for the European flat oyster Ostrea edulis L.
Provedor de dados: 5
Autores: Lallias, Delphine; Lapegue, Sylvie; Harley, Crhis; Boudry, Pierre; Heurtebise, Serge; Beaumont, Andy.
The flat oyster Ostrea edulis is the species endemic to European coasts, both Atlantic and Mediterranean. It has been exploited since Roman times, but its aquaculture production decreased from around 20000 tons in the 1950's to 1500 tons today because of two successive diseases due to the intracellular parasites Marteilia refringens and Bonamia ostreae. Since 1985, Ifremer has been undertaking a breeding program to produce families of oysters tolerant to Bonamia. In this context, a further step would be to identify QTLs for resistance to this parasite. Therefore, as a first step a genetic map is now being built. The establishment of a genetic linkage map will provide a foundation for the mapping of QTLs, with the ultimate objective to implement...
Tipo: Text
Palavras-chave: QTLs; Ostrea edulis; Flat oyster; Genetic linkage map; Genetic.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3466.pdf

A first genetic linkage map of the European flat oyster, Ostrea edulis : towards the identification of Bonamia resistance QTLs
Provedor de dados: 5
Autores: Lallias, Delphine; Lapegue, Sylvie; Haley, Chris; Heurtebise, Serge; Boudry, Pierre; Beaumont, Andy.
The flat oyster Ostrea edulis is an endemic European oyster species, found on both Atlantic and Mediterranean coasts. Its aquacultural production has dramatically decreased due to two successive diseases caused by the intracellular parasites Marteilia refringens and Bonamia ostreae. Since 1985, Ifremer has undertaken a breeding program to produce oyster families which are tolerant to Bonamia. In this context, the next step is to identify QTLs for resistance to this parasite. A genetic map is therefore being established as a basis for QTL work. The reference family is an F2 family produced by single pair mating of two oysters from the same F1 family. The F1 family was itself produced from a bi-parental cross between a wild oyster and an individual from the...
Tipo: Text
Palavras-chave: Genetic linkage map; Parasite; Genetic; QTLs; Resistance; Bonamia ostreae; Ostrea edulis; Flat oyster.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3464.pdf

Molecular responses of Ostrea edulis haemocytes to an in vitro infection with Bonamia ostreae
Provedor de dados: 5
Autores: Morga, Benjamin; Arzul, Isabelle; Faury, Nicole; Segarra, Amelie; Chollet, Bruno; Renault, Tristan.
Bonamiosis due to the parasite Bonamia ostreae is a disease affecting the flat oyster Ostrea edulis. B. ostreae is a protozoan, affiliated to the order of haplosporidia and to the cercozoan phylum. This parasite is mainly intracellular, infecting haemocytes, cells notably involved in oyster defence mechanisms.  Suppression subtractive hybridisation (SSH) was carried out in order to identify oyster genes differentially expressed during an infection of haemocytes with B. ostreae. Forward and reverse banks allowed obtaining 1104 and 1344 clones respectively, among which 391 and 480 clones showed a differential expression between both tested conditions (haemocytes alone versus haemocytes in contact with parasites). ESTs of interest including genes involved in...
Tipo: Text
Palavras-chave: Bonamia ostreae; Protozoan; Ostrea edulis; Flat oyster; Haemocytes; Gene expression; Suppression subtractive hybridisation.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00018/12879/9828.pdf

Fragmentation des populations naturelles d'Ostrea edulis: une adaptation locale de l'huître plate européenne
Provedor de dados: 5
Autores: Harrang, Estelle; Bierne, Nicolas; Heurtebise, Serge; Morga, Benjamin; Lapegue, Sylvie.
L'huître plate européenne Ostrea edulis a connu une période faste dans l'aquaculture jusqu'à la fin des années 1960, lorsque deux parasites, Marteilia refringens (1969) et Bonamia ostreae (1979), ont successivement décimé les bancs naturels de cette espèce endémique, déjà affaiblis par la sur-exploitation de ses gisements. Historiquement présente sur toute la côte européenne, de la Mer du Nord à la Mer Méditerranée, en passant par l'Océan Atlantique, la Mer Adriatique et la Mer Noire, les bancs naturels de cette espèce sont devenus très localisés, laissant penser à des phénomènes d'adaptation locale de l'huître vis à vis de son environnement biotique et abiotique.  La diversité et la structuration génétique de plusieurs populations de l'espèce, à l'échelle...
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Génétique des populations; Sélection Génétique.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00014/12547/9417.pdf

Bilan des productions expérimentales d'huîtres plates de 2005 à 2010 au Laboratoire de Génétique et Pathologie de La Tremblade
Provedor de dados: 5
Autores: Heurtebise, Serge; Harrang, Estelle; Lallias, Delphine; Lapegue, Sylvie.
L’objectif de ce rapport est de détailler les productions d’huîtres plates européennes, Ostrea edulis, dans le cadre des projets de recherche développés autour de l’amélioration génétique de cette espèce. Nous avons choisi de synthétiser les actions de recherche dans un premier temps puis la production des huîtres et les expérimentations dans un ordre chronologique.
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Production expérimentale; Amélioration génétique.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00013/12421/9211.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

Can survival of European flat oysters following experimental infection with Bonamia ostreae be predicted using QTLs?
Provedor de dados: 5
Autores: Harrang, Estelle; Heurtebise, Serge; Faury, Nicole; Robert, Maeva; Arzul, Isabelle; Lapegue, Sylvie.
The present study identifies quantitative trait loci (QTLs) in response to an experimental infection with the parasite responsible for bonamiosis, Bonamia ostreae, in two segregating families of the European flat oyster, Ostrea edulis. We first constructed a genetic-linkage map for each studied family and improved the existing genetic-linkage map for the European flat oyster with a set of SNP markers. This latter map now combines the best accuracy and the best estimate of the genome coverage available for an oyster species. Secondly, by comparing the QTLs detected in this study with those previously published for O. edulis in similar experimental conditions, we identified several potential QTLs that were identical between the different families, and also...
Tipo: Text
Palavras-chave: Ostrea edulis; Single Nucleotide Polymorphism; Disease resistance; Genetic and QTL mapping; Candidate genes.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00271/38244/36429.pdf

Mise au point de techniques d'isolement de parasites - Compte rendu d'activité
Provedor de dados: 5
Autores: Grizel, Henri; Bachere, Evelyne; Gagneraud, Sylvie; Audic, Guylaine.
Les recherches faisant l'objet de ce contrat ont porté sur la mise au point de techniques adaptées aux bivalves marins et à l'étude du parasite Bonamia ostreae responsable de la maladie hémocytaire de l'huître plate, Ostrea edulis.
Tipo: Text
Palavras-chave: Pathologie; Huître plate; Ostrea edulis; Bonamia ostreae; Techniques laboratoire.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00015/12626/9514.pdf

Contribution à la validation et à l'optimisation de la technique de PCR pour la détection de Bonamia ostreae chez l'huître plate : Ostrea edulis
Provedor de dados: 5
Autores: Touzeau, Damien.
L'ostréiculture représente une part économique régionale et française importante avec une production d'environ 117 106 Tonnes de coquillages par an (FAO, 2003). Cependant le développement de cette activité peut être limité par des mortalités, parfois massives, dues à des maladies infectieuses. L'huître plate Ostrea edulis a subi deux maladies majeures : la Marteiliose due à Marteilia refringens et la Bonamiose due à Bonamia ostreae. Ces maladies à déclaration obligatoires ont fait chuter la production de 20 000 tonnes dans les années 70 à 2 098 Tonnes aujourd'hui. Suite à ces mortalités, différents programmes de recherche ont été lancés par Ifremer pour tenter de préserver voire de relancer la culture de l'huître plate. Un de ces programmes concerne la...
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Parasite; Bonamia ostreae; Technique PCR; ARN 18 S; Diagnostic.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00034/14478/11777.pdf

Données sur la situation de la maladie de l'huître plate, Ostrea edulis L.
Provedor de dados: 5
Autores: Grizel, Henri; Tige, Gilbert; Rabouin, Marie-agnès.
Throughout the years 1974-1975, the flat oyster (Ostrea edulis Linné) disease has gradually spread to most of the French oyster culture centres and caused very important losses in farmed oysters and natural deposits. This note analyses the current evolution of the epizooty; to do so, we differentiate three types of flat oyster culture centres: Centres affected in the past by the epizooty and where the traditional flat oyster culture has become uncertain. It has been replaced by the culture of Crassostrea gigas and by the finishing, for 7 to 8 months, of flat oysters aged 3 or 4 years old which remained of good quality. Centres recently touched by the epizooty where the culture of flat oysters (18 months and 2 years old) from unharmed spat is still possible...
Tipo: Text
Palavras-chave: Marteilia refringens; Pathologie; Ostrea edulis; Huître.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/acte-5928.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

Stratégie d'utilisation de différentes espèces animales par le parasite Marteilia refringens pour assurer son cycle biologique
Provedor de dados: 5
Autores: Audemard, Corinne.
Au cours des trente dernières années, la production française d 'huître plate Ostrea edulis est passée de 30 000 tonnes par an à seulement 1 500 tonnes actuellement. Le parasite de la glande digestive de l'huître plate, Marteilia refringens, est en partie responsable de cette chute de production. La gestion des risques liés au développement de cette maladie en zone endémique, nécessite la mise en évidence des compartiments fonctionnels de ce cycle parasitaire. Les travaux antérieurs ont montré que le cycle de M. refringens était vraisemblablement hétéroxène, cependant cette hypothèse n'avait jamais pu être démontrée, limitant cette gestion. La recherche d'hôtes de M. refringens a pu être réalisée par l'application d'outils de biologie moléculaire (PCR et...
Tipo: Text
Palavras-chave: Pathologie des mollusques; Marteilia refringens; Ostrea edulis; Paracartia grani; Cycle de vie; Outils de biologie moléculaire; Modèle d'étude.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00107/21850/19440.pdf

Données sur la situation de la maladie de l'huître plate, Ostrea edulis
Provedor de dados: 5
Autores: Grizel, Henri; Tige, Gilbert; Rabouin, Marie-agnès.
Au cours des années 1974-1975, la maladie de l'huître plate, Ostrea edulis Linné, a peu à peu gagné la majorité des centres ostréicoles français et provoqué des pertes très importantes tant sur les huîtres d'élevage que sur les gisements naturels. Cette note analyse l'évolution actuelle de l'épizootie ; elle distingue pour cela trois types de centres d'élevage de l'huître plate : les centres anciennement touchés par l'épizootie où la culture traditionnelle de l'huître plate est devenue aléatoire. Elle est remplacée par celle de Crassostrea gigas et par l'affinage, pendant 7 à 8 mois, d'huîtres plates de 3 ou 4 ans qui restent de bonne qualité. Les centres récemment atteints par l'épizootie où, après dragage des bancs naturels parasités, l'élevage d'huîtres...
Tipo: Text
Palavras-chave: Ostréiculture; Ostrea edulis; Pathologie; Maladie; Huître plate.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/00009/11999/8692.pdf

Obtention de souches conchylicoles performantes par polyploïdisation (3ème partie)
Provedor de dados: 5
Autores: Gerard, Andre; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Noiret, Christophe; Bodoy, Alain; Heurtebise, Serge; Garnier, Jacqueline.
The third part of the polyploidisation program of the main French species of commercial interest, this report presents the actions and results for the year 1991 which was devoted to:- continuation of the development trials of the triploidy induction technique in Ruditapes decussates (i.e. indigenous clam)- production of diploid and triploid populations of Ostrea edulis (i.e. flat oyster)- control of diploid and triploid population performances in cupped oyster and Pacific clam in their natural habitat- continuation of the development of a ploidy control technique through image analysis- beginning of the development of a new polyploidy induction technique in bivalve molluscs
Tipo: Text
Palavras-chave: Ruditapes decussatus; Ostrea edulis; Ruditapes philippinarum; Crassostrea gigas; Imagerie numérique; Cytogénétique; Polyploïdie.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/rapport-3857.PDF

Mise au point d'une méthode d'estimation du recrutement en huîtres plates (Ostrea edulis L.) sur coques de moules en suspension
Provedor de dados: 5
Autores: Martin, Anne-genevieve; Durand, Jean-louis; Carbonnier, N.; Le Bec, Claude; Langlade, Aime; Claude, Serge.
A new process of collecting fIat oyster spat in deep water, based on the use of suspended mussel shell, was perfected between 1978 and 1982. The technique has contributed the continued breeding of the species in Quiberon bay (Brittany ) , in spite of the presence of Bonamia ostreae. In order to quantify the number of spat recruited by this technique each year, a method of estimation was tested during the summer 1985. This paper describes the sampling strategy and the results.
Tipo: Text
Palavras-chave: Ostréiculture; Ostrea edulis; Captage; Naissain; Huître plate.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00019/13018/9994.pdf

Essai de culture de l'huître plate Ostrea edulis dans le bassin d'Arcachon. Résultats préliminaires
Provedor de dados: 5
Autores: Robert, Rene; Pichot, Yves; Comps, Michel.
From 1988 to 1989, a study has been conducted pertaining to the growth of the flat oyster Ostrea edulis, as well as Marteilia refringens and Bonamia ostreae outbreaks.  Commercial mono specific farming (flat oysters), with low density or mixed (flat and hollow oysters) along with higher density, has been taking place in the Arcachon basin oceanographic sectors, where main hydrobiological parameters were acquired simultaneously.   The excellent growth of the flat oyster was witnessed in mono specific farming. However this growth was average in mixed farming, probably due to higher total oyster density and interspecies competition. Regardless of the type of farming, Marteilia refringens infection was very quick and may have been related to climatic bay water...
Tipo: Text
Palavras-chave: Basin of Arcachon; Pathology; Bonamia ostreae; Marteilia refringens; Growth; Ostrea edulis; Bassin d'Arcachon; Pathologie; Bonamia ostreae; Marteilia refringens; Croissance; Ostrea edulis.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/rapport-1592.pdf

Influence of diet assemblage on Ostrea edulis broodstock conditioning and subsequent larval development
Provedor de dados: 5
Autores: Gonzalez, Ricardo; Mingant, Christian; Petton, Bruno; Robert, Rene.
In contrast with the Japanese oyster Crassostrea gigas and the Manila clam Ruditapes philippinarum, Ostrea edulis seed production in the hatchery has been reported to be erratic, with sudden and unexplained larval and post-metamorphosis mortalities. Fecundity and initial larval quality have been related to broodstock conditioning, but effects on larval development and metamorphosis remain poorly understood. In addition, molluscan larval mortalities have been often associated with bacterial contamination and flow-through techniques may help to overcome this problem. Both aspects have been considered in the present work. O. edulis broodstock were conditioned at 19 °C and fed three different microalgal diets. Two were single-species diets: Rhodomonas salina...
Tipo: Text
Palavras-chave: Ostrea edulis; Feeding; Broodstock conditioning; Larval development; Flow-through.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00090/20093/17732.pdf

Contrôle des performances des souches d'huîtres plates résistantes au protozoaire Bonamia ostreae 2ème année
Provedor de dados: 5
Autores: Haure, Joel; Nourry, Max; Le Bayon, Nicolas; Baud, Jean-pierre.
Un contrôle des performances de souches d'huîtres plates, Ostrea edulis, issues d'un plan de sélection a été réalisé d'avril à novembre 1995 en élevage intensif. Un débit d'eau de mer fixé à 4l/heure/huître et un apport nutritif (Skeletonema costatum) de 3.10(9) cellules/jour/huître semblent constituer un bon compromis pour satisfaire les exigences physiologiques de l'huître plate. Les lots d'huîtres résistantes ou tolérantes à Bonamia ostreae présentent de meilleures performances de croissance que les lots témoins. Une hiérarchisation de la croissance validée sur le plan statistique a été mise en évidence comme suit : R6 (F0*F1) &gt; R7 (F1*F2) &gt; Q (lot témoin). La plupart des huîtres ont été infestées par le ver Polydora, malgré le traitement à la...
Tipo: Text
Palavras-chave: Génétique quantitative; Ostrea edulis; Bonamia ostreae; Souche résistante.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00048/15875/13297.pdf

La bonamiose de l' huître plate Ostrea edulis. Bilan des connaissances actuelles, analyse des données collectées en France de 1989 à 2004, mesures de lutte et perspectives
Provedor de dados: 5
Autores: Blanchet, Estelle.
Bonamiosis, favoured by change of temperature and stress, causes mortalities in the adult flat oyster Ostrea edulis in the majority of European oyster farmers. The life cycle of this Haplosporidia protozoan Bonamia ostreae is unknown, it is not dttectable during the five mon th latent period. Because of the Jack of sensibility of reference techniques, histology and tissue smear, further use of PCR assays or HCM-CC, in particular, is recommended. Analysis of data collected in France from 1989 to 2004 shows the absence of simple prediction methods and an apparent cyclicity of the disease. Transfer restriction and control of boat hulls can protect uninfected areas. Reducing stress and density, commercialising earlier can limit losses in infected areas. The...
Tipo: Text
Palavras-chave: Bivalve; Bonamia ostreae; Epidémiologie; Haplosporidia; Huître plate; Lutte; Ostrea edulis; Protozoaire; Surveillance; Bonamia ostreae; Control; Epidemiology; Flat oyster; Haplosporidia; Ostrea edulis; Protozoan; Survey.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00451/56235/57795.pdf

Observations sur le cycle de Marteilia refringens
Provedor de dados: 5
Autores: Grizel, Henri; Tige, Gilbert.
Observations on the cycle of Marteilia refringens in light and electronic microscopy led us to realise in situ experiences of experimental infestation. According to the rivers the period of infestation varied between may and auguste. During the winter the parasite seems to be absent from the tissues of the oyster.
Tipo: Text
Palavras-chave: Ostrea edulis; Parasite; Infestation; Marteilia refringens.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-3225.pdf

Diversité génétique et dynamique du recrutement chez l'huître plate Ostrea edulis L. (2003)
Provedor de dados: 5
Autores: Lapegue, Sylvie; Taris, Nicolas; Boudry, Pierre; Langlade, Aime; Bonhomme, Francois.
Le milieu marin est un milieu difficile à appréhender car composé d'un ensemble d'organismes et d'écosystèmes caractérisés par des conditions de fonctionnement tout à fait originales et souvent difficiles d'accès. Ces spécificités peuvent être attribuées à la structure spatiale du milieu marin, qui à bien des égards, diffère du milieu terrestre. En effet si les notions de barrières géographiques sont une réalité concrète pour les organismes terrestres, elles restent rarement identifiées en milieu marin (PALUMBI 1994). Dans un tel environnement, les organismes présentent des cycles de vie souvent mal connus, notamment ceux qui associent phase benthique et phase planctonique. L'étude de la structure génétique des populations, dans un espace aussi ouvert aux...
Tipo: Text
Palavras-chave: Diversité génétique; Génétique; Recrutement; Génotypage; Variabilité génétique; Huître plate; Ostrea edulis.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00044/15478/12857.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

La Bonamiose : études des mécanismes cellulaires de défense de l'huître plate, Ostrea edulis, vis à vis du parasite Bonamia ostreae
Provedor de dados: 5
Autores: Cochennec, Nathalie; Renault, Tristan; Chollet, Bruno.
Bonamiosis—a disease caused by a protozoan parasite, Bonamia ostreae—was detected for the first time in Brittany in 1979 in conjunction with a massive mortality event. Since then, the disease has spread to all French oyster farming areas, and then throughout Europe.
Tipo: Text
Palavras-chave: Pathologie; Ostrea edulis; Bonamia ostreae.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-3241.pdf

Analyse bibliographique: historique de l'huître plate, Ostrea edulis, et la Bonamiose, maladie due au protozoaire Bonamia ostreae
Provedor de dados: 5
Autores: Cochennec-laureau, Nathalie.
Oyster productions represent an important part of the french aquaculture. However, diseases are considered as the first limiting factors for the development of this activity around the world. Two exemples point out this problem for the french flat oyster production: Marteiliosis, the disease of the digestive gland, caused by Marteilia refringens, and Bonamiosis, the hemocytic disease, caused by Bonamia ostreae. This report proposes a bibliography analysis of major results obtained for Bonamiosis studies.
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Bonamia ostreae; Bonamiose; Pathologie; European flat oyster; Oslrea edulis; Bonamia ostreae; Bonamiosis; Pathology.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00105/21661/19242.pdf

Les huîtres des côtes françaises Ostrea edulis et Gryphaea angulata
Provedor de dados: 5
Autores: Lambert, Louis.
Les bancs d'huîtres plates Ostrea edulis formaient jadis un cordon ininterrompu sur toutes les côtes de France. Quelques chiffres donneront une idée des quantités d'huîtres pêchées jadis sur les côtes françaises. A la fin du XVIII ème siècle et au début du XIV ème, les pêcheurs enlevaient des seuls bancs de Cancale et Granville au minimum cent millions d'huîtres par ans; leurs bateaux pêchaient du 1er Septembre au 1er Avril sans discontinuer. La destruction du naissain et des petites huîtres par les dragues très lourdes que l'on employait alors était plus grand encore. L'exportation, de 1772 à 1775, atteignit le chiffre de 293 millions. En 1775, notamment, 234 bateaux normands et 104 anglias emportaient de la baie de Cancale 95 millions d'huîtres.
Tipo: Text
Palavras-chave: Huître plate; Huître portugaise; Ostrea edulis; Gryphaea angulata; Ostréiculture; Récolte naissain; Technique élevage; Ennemis; Maladies; France.
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00004/11491/8055.pdf

Plan de relance de l'huître plate Ostrea edulis L.. Travaux 1985.
Provedor de dados: 5
Autores: IFREMER.
La situation épidémiologique due à Bonamia ostreae n'a pas évoluée au cours de 1985. Les élevages réalisés dans le cadre du plan de relance ont confirmé la très faible propagation du parasite,en eau profonde, jusqu'à l'âge de deux ans. Des résultats encourageants ont également été obtenus avec des huîtres plus âgées. Les essais d'acclimatation effectués avec Ostrea angasi ont permis de constater la réceptivité de cette huître aux deux Protozooses mais également sa sensibilité à une Haplosporidie. L'étude de cette dernière et d'une Haplosporidie sp. trouvée chez des huîtres plates de Méditerranée a été réalisée en microscopie électronique. Les techniques d'isolement et de purification de Marteilia refringens ont été adaptées à d'autres Protozoaires. Des...
Tipo: Text
Palavras-chave: Ostréa edulis; Pathologie; Elevages; Acclimatation; Ostrea edulis; Pathology; Breeding; Acclimatation.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00102/21328/18951.pdf

Recherches sur une maladie epizootique de l'huitre plate Ostrea edulis Linne
Provedor de dados: 5
Autores: Bonami, Jean-robert; Grizel, Henri; Vago, Constantin; Dutholt, Jean-louis.
Digestive glands of Ostrea edulis affected by an epizootic have been examined by light- and electron- microscopy. Round, compact lesions in the digestive gland cells contain refractive elements staining slightly blue or red with Geimsa. Ultra-structurally, each lesion contains (a) dense cytoplasma, without mitochondria and with paracrystal-line inclusions, (b) enclosed regions with vacuolar cytoplasm, no mitochondria and two types of formation; one is opaque, the other a vacuole containing ribosomes, lamellar structures and peripheral ovoid particles. The nature and significance of these structures is not known.
Tipo: Text
Palavras-chave: Histology; Epizooty; Ostrea edulis.
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1971/publication-2238.pdf

Study of interactions between flat oyster, Ostrea edulis, and the parasite Bonamia ostreae using flow cytometry and suppression subtractrive hybridization (SSH)
Provedor de dados: 5
Autores: Morga, Benjamin; Arzul, Isabelle; Faury, Nicole; Gagnaire, Beatrice; Chollet, Bruno; Renault, Tristan.
Bonamiosis due to the intrahaemocytic protistan parasite Bonamia ostreae is a European endemic disease affecting flat oysters Ostrea edulis. Control of bonamiosis requires a good knowledge of the parasite life cycle including host-parasite interactions. In this study, we investigated interactions between parasites and haemocytes by flow cytometry and Suppression Subtractive Hybridization (SSH). In both approaches, analyses were performed after 2 hours of contact between haemocytes and parasites purified from highly infected flat oysters. Flow cytometry analyses consisted in testing haemocyte activities including esterase activities, reactive oxygen species (ROS) production and phagocytosis after contact with live parasites and parasites inactivated by...
Tipo: Text
Palavras-chave: SSH; Suppression subtractive hybridization; Cytometry; Bonamia ostreae; Parasite; Ostrea edulis; Oyster.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3367.pdf

Données sur le nouveau parasite de l'huître plate. Situation épidémiologique
Provedor de dados: 5
Autores: Tige, Gilbert; Grizel, Henri; Comps, Michel.
Abnormal mortalities of flat oysters, Ostrea edulis, have been monitored in June 1979 in some farms of l'Ile Tudy. The examination of these oysters with light and electron microscopy showed different forms of an intracellular parasite localized in the connective tissue of the gills and the digestive gland. It is also detectable in the blood vessels and the stomachal epithelium. Numerous parasited oysters showed distinctive branchial damages (perforations, indentations) visible through macroscopic examination. The epidemiological monitoring carried out on the Norman and Breton coast revealed the presence of this parasite in a large number of flat oyster farms. The percentage of parasited oysters is higher in areas where mortalities have been monitored but...
Tipo: Text
Palavras-chave: Epidémiologie; Huître plate; Ostrea edulis; Mortalité.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/acte-4925.PDF

Suivi des gisements naturels de mollusques dans le cadre du réseau Repamo
Provedor de dados: 5
Autores: Garcia, Celine; Francois, Cyrille; Arzul, Isabelle; Miossec, Laurence; Joly, Jean-pierre; Robert, Maeva; Chollet, Bruno; Ferrand, Sylvie.
A monitoring of the natural and high density populations of commercial molluscs is performed on an annual basis within the scope of the Repamo mollusc pathology monitoring network The aim of this surveillance is (1) to monitor the health status of the molluscs along the French coast and to produce a reference picture, and (2) to study the evolution of the noticeable pathogenic agents existing on the national territory. Different sampling strategies have been introduced for the past 15 years; each strategy is based on an active monitoring including the systematic study of natural mollusc deposits. Indeed, the natural and high density mollusc populations are interrelated and pathogenic agents can be and have been exchanged between these populations with...
Tipo: Text
Palavras-chave: Haliotis tuberculata; Ostrea edulis; Population sauvage; Elevage; Mollusques; REPAMO; Réseau surveillance.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/acte-3720.pdf

Relance de l'huître plate. Rapport d'avancement des travaux. Année 1992
Provedor de dados: 5
Autores: Martin, Anne-genevieve.
A revival program for the European flat oyster Ostrea edulis was initiated in Brittany in 1984 and funded by regional and national agencies. Since then, the research programs were carried out and the 1992 results are presented in this report. Disease status and spat settlement trends are described within each breeding area as well as advances in management practices and genetic research.
Tipo: Text
Palavras-chave: Bivalves; Ostrea edulis; Bonamia ostreae; Marteilia refringens; Epidemiologie; Pathologie; Génétique; Echantillonnage; Elevage; Shellfish; Ostrea edulis; Bonamia ostreae; Marteilia refringens; Epidemiology; Pathology; Genetic; Sampling; Breeding.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00427/53823/54814.pdf

Obtention de souches conchylicoles performantes par polyploïdisation (5ème partie)
Provedor de dados: 5
Autores: Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Baud, Jean-pierre; Nourry, Max; Haure, Joel; Heurtebise, Serge; Garnier, Jacqueline; Martin, Anne-genevieve; Claude, Serge; Langlade, Aime; Joly, Jean-pierre; Goulletquer, Philippe; Ruelle, Francois; Coatanea, Denis; Oheix, Jocelyne; Vercelli, Catherine; Chabirand, Jean-michel; Maurer, Daniele; Borel, Michel; Cardinal, Mireille; Cornet, Josiane; Le Pennec, Marcel; Le Mercier, A.
This fifth part of the polyploidisation program reports the experiments that were conducted in 1993 and that were devoted to : - monitoring growth performance of Ostrea edulis diploids and triploids in La Trinité sur Mer and Palavas - monitoring growth performance of Crassostrea gigas diploids and triploids in Port en Bessin, Marennes Oleron (2 locations), Arcachon and Palavas - comparative study of gametogenesis for C. gigas diploids and triploids - comparative study of C. gigas diploids and triploids using sensorial analysis At the end of fifth year, it was clear that triploids are advantageous although such a statement must be moderated according to locations. The gametogenesis stydy showed that triploidy is associated with partial to complete...
Tipo: Text
Palavras-chave: Crassostrea gigas; Ostrea edulis; Cytogenetics; Polyploidy; Crassostra gigas; Ostrea edulis; Cytogénétique; Polyploïdie.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/rapport-3860.PDF

Bonamia ostreae-induced mortalities in one-year old European flat oysters Ostrea edulis: experimental infection by cohabitation challenge
Provedor de dados: 5
Autores: Lallias, Delphine; Arzul, Isabelle; Heurtebise, Serge; Ferrand, Sylvie; Chollet, Bruno; Robert, Maeva; Beaumon, Andy; Boudry, Pierre; Morga, Benjamin; Lapegue, Sylvie.
Bonamiosis is a parasitic disease (causative agent: Bonamia ostreae) affecting the European flat oyster Ostrea edulis, responsible for a drastic decline in its aquaculture production. Selective breeding programs for resistance to bonamiosis have been undertaken to counter this disease. In the present study, a 6-month cohabitation challenge experiment was performed in order to transmit the disease from wild oysters injected with the parasite to two tested families of oysters (20 and 8-month old at the beginning of the experiment, with different genetic backgrounds) originating from a selective breeding program developed by IFREMER in France. Mortalities were checked daily and ventricular heart smears were performed on dying or moribund oysters to detect the...
Tipo: Text
Palavras-chave: Heart smear; Transmission; Cohabitation experiment; Bonamia ostreae; Ostrea edulis.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4783.pdf

Growth and mortality of the European oyster Ostrea edulis in the Bay of Arcachon (France)
Provedor de dados: 5
Autores: Robert, René; Borel, Michel; Pichot, Yves; Trut, Gilles.
A study of the growth and mortality of the European oyster Ostrea edulis , including the effects of Marteilia refringens and Bonamia ostreae , was carried out in three oceanic areas in the Bay of Arcachon from May 1989 to February 1991. One-year-old spat, free from disease were used for the trials. Six months after beginning the trials, Marteilia refringens had severely infested the cultures. Although Bonamia ostreae was found during the first year, the rate of infestation was low. In the second year bonamiasis increased and high mortality (&gt; 60%) occurred in Ostrea edulis populations. Although the growth of the oysters was good, their condition index was generally poor. Moreover, shell perforations by Polydora sp. were observed. The influence of...
Tipo: Text
Palavras-chave: Ostrea edulis; Pathologie; Mortalité; Croissance; Reproduction; Composition biochimique; Bassin Arcachon; Ostrea edulis; Pathology; Mortality; Growth; Reproduction; Gross biochemical composition; Bay of Arcachon.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00015/12600/9477.pdf

Selecting flat oysters, Ostrea edulis, for survival against the parasite Bonamia ostreae : assessment of the resistance of a first selected generation
Provedor de dados: 5
Autores: Martin, Anne-genevieve; Gerard, Andre; Cochennec, Nathalie; Langlade, Aime.
In 1989, a selected strain of flat oyster. Ostrea edulis, was produced from breeders that survived Bonamia ostreae and that were over selected by injection of purified parasites. This generation (G 1) was compared to native oysters which had settled during the same year. After a growing period of 21 months,  the oysters were tested according to three procedures: exposure to natural infection in an intertidal area, maintenance at the laboratory in tanks near heavily infested oysters, injection of parasites. The test lasted 7 months. In each procedure, oysters of the first generation (G1) showed a better survival rate than control oysters (72 to 94% versus 48 to 66%). On the other hand, the highest mortalities were observed among injected oysters (G1 and...
Tipo: Text
Palavras-chave: Genetics; Ostrea edulis; Bonamia ostreae; Parasite resistance.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/acte-3201.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

Approche comparative de la variabilité et de la structuration génétique chez deux espèces d'huîtres cultivées (Crassostrea gigas et Ostrea edulis) présentant des stratégies reproductives et des histoires contrastées
Provedor de dados: 5
Autores: Boudry, Pierre; Launey, Sophie; Huvet, Arnaud.
The two common oyster species cultivated in Europe are the flat oyster Ostrea edulis and the cupped oyster Crassostrea gigas. These species have two really different reproduction strategies (oviparity versus larviparity) and histories (natural distribution versus introductions linked to oyster culture). We used microsatellite markers to compare the observed variabilities Europe wide. O. edulis presents a lower rate of alleles per locus than C. gigas. The observed structuration levels (global Fst and by pairs values) are similar for both species, but the spatial organisation of the diversity is different. In O. edulis, appears a differentiation based on the distance (concordance of the results with those obtained with the allozymes) whereas in C. gigas,...
Tipo: Text
Palavras-chave: Différenciation génétique; Variabilité; Génétique; Crassostrea gigas; Ostrea edulis; Huîtres.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/acte-3455.pdf

Anaesthesia and gonad sampling in the European flat oyster (Ostrea edulis)
Provedor de dados: 5
Autores: Suquet, Marc; Gonzalez, Ricardo; Lebrun, Luc; Queau, Isabelle; Mingant, Christian; Robert, Rene.
Controlled reproduction of the European flat oyster requires the development of tools adapted to this species, including a practical anaesthesia and gonad sampling protocol to facilitate sex determination and the verification of gametogenesis. Three replicate groups of 10 oysters (mean weight +/- SD: 29.9 +/- 8.5 g) were anaesthetised in 5 L containers using magnesium chloride designed either for laboratory (Flucka (R)) or agricultural (Dead Sea Work (R): DSW) use, at two concentrations (50 or 72 g L-1). No significant differences were observed in the percentages of oysters anaesthetised or subsequent oyster mortality with the different anaesthetics or concentrations, but increasing water temperature from 14.9 to 18.8 degrees C significantly increased the...
Tipo: Text
Palavras-chave: Oyster; Ostrea edulis; Anaesthesia; Magnesium chloride; Gonad sampling.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00018/12907/9876.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

Etude ecophysiologique de quelques mollusques bivalves
Provedor de dados: 5
Autores: Riva, A; Masse, H.
Using an experimental flowing system, the filtration rate of Mytilus galloprovincialis, Ostrea edulis, Ruditapes decussatus and Ruditapes aureus has been measured by an indirect technique under Mediterranean thermal conditions in coastal open sea. The oxygen consumption and excretion rate of ammonia have been estimated and influence of temperature and salinity tested for M. galloprovincialis . The results are discussed and compared to literature data.
Tipo: Text
Palavras-chave: Ruditapes decussatus; Ostrea edulis; Mytilus galloprovincialis; Bivalvia; Respiration; Excretion; Oxygen consumption; Water filtration; Ecophysiology; Méditerranéee; Excrétion; Respiration; Filtration; Bivalves.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1177.pdf

Etude des intéractions entre le parasite Bonamia ostreae et son hôte, huître plate Ostrea edulis in vitro
Provedor de dados: 5
Autores: Morga, Benjamin; Arzul, Isabelle; Chollet, Bruno; Gagnaire, Beatrice; Renault, Tristan.
Bonamiosis is a disease affecting the flat oyster Ostrea edulis and caused by the protozoa parasite Bonamia ostreae, which is affiliated to the haplosporidia order and the cercozoa phylum. This parasite is mainly intracellular, infecting haemocytes, circulating cells playing an important role in the oyster's defence mechanisms. Even though the parasite's cycle has not been completely understood yet, direct infection from infected oysters to healthy oysters is possible. This leads us to think that there is no intermediary host in the cycle. Very little data on the parasite's infection mechanisms or the host's defence mechanisms is available. In order to better comprehend the Bonamia ostreae / host interaction, some flat oyster's haemocytes have been put in...
Tipo: Text
Palavras-chave: Hémocytes; Ostrea edulis; Bonamia ostreae; Parasite; Huîtres.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3368.pdf

Cytotoxic and antibacterial properties of Mytilus galloprovincialis, Ostrea edulis and Crassostrea gigas (bivalve molluscs) hemolymph
Provedor de dados: 5
Autores: Hubert, Florence; Van Der Knaap, Wil; Noel, Thierry; Roch, Philippe.
Mussel (Mytilus galloprovincialis) plasma contains cytotoxic activity against both vertebrate (erythrocytes and mouse tumour) and protozoan cells. Procaryotes (Escherichia coli and Vibrio alginolyticus) were not sensitive to the cytotoxicity. The activity was still present in dialyzed samples but was inhibited by heating at 45°C. Large individual variability which was not correlated with protein concentration and an increasing number of reactive specimens following injection, suggested that naive mussels were in various stages of immune response. Purification by anion exchange chromatography followed by gel filtration revealed a 320 kDa cytotoxic polymeric protein that acts through a polymerization process after binding onto target cell membranes as...
Tipo: Text
Palavras-chave: Cytotoxicité; Antibactérien; Hémolymphe; Lysat d'hémocyte; Moule; Huître; Mytilus galloprovincialis; Ostrea edulis; Crassostrea gigas; Cytotoxicity; Antibacterial; Hemolymph; Hemocyte lysate; Musssel; Oyster; Mytilus galloprovincialis; Ostrea edulis; Crassostrea gigas.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00039/15008/12333.pdf

Serological and analysis of Bonamia in Ostrea edulis and Tiostrea lutaria using polyclonal and monoclonal antibodies
Provedor de dados: 5
Autores: Mialhe, Eric; Boulo, Viviane; Elston, Ralph; Hill, Barry; Hine, Michel; Montes, Jaime; Mont, Jaime; Banning, Paul Van; Grizel, Henri.
Murine moncolonal and polyclonal antibodies to antigesn of Bonamia ostreae were assessed for serological comparaison of parasites associated with different geographical originns of flat oyster, Ostrea edulis, and with Tiostrea lutaria. All Bonamia isolates from O. edulis reacted similary with polyclonal and monoclonal antibodies. The parasite associed with Tiostrea lutaria which lacks reactivity with 20 B 2 MAB must be considered as a serologically distinct from of B. ostreae
Tipo: Text
Palavras-chave: Serological comparison; Polyclonal and monoclonal antibodies; Tiostrea lutaria; Ostrea edulis; Bonamia; Comparaison sérologique; Anticorps polyclonaux et monoclonaux; Tiostrea lutaria; Ostrea edulis; Bonamia.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/publication-3101.pdf

Population bottleneck and effective size in Bonamia ostreae-resistant populations of Ostrea edulis as inferred by microsatellite markers
Provedor de dados: 5
Autores: Launey, Sophie; Barre, Marc; Gerard, Andre; Naciri, Yamama.
Genetic variability at five microsatellite loci was analysed in three hatchery-propagated populations of the flat oyster, Ostrea edulis. These populations were part of a selection programme for resistance to the protozoan parasite Bonamia ostreae and were produced by mass spawns, without control of the genealogy. Evidence for population bottlenecks and inbreeding was sought. A reduction in the number of alleles, mainly due to the loss of rare alleles, was observed in all selected populations, relative to the natural population from which they were derived. Heterozygote excesses were observed in two populations, and were attributed to substructuring of the population into a small number of families. Pedigree reconstruction showed that these two populations...
Tipo: Text
Palavras-chave: Inbreeding; Effective population size; Bonamia ostreae; Ostrea edulis; European flat oyster.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-2703.pdf

Relance de l'huître plate, Ostrea edulis. Bilan des travaux réalisés en 1993
Provedor de dados: 5
Autores: Martin, Anne-genevieve.
A revival program for the European flat oyster Ostrea edulis was initiated in Brittany in 1984 and funded by regional and national agencies. Since then, the research programs were carried out and the 1993 results are presented in this report. Disease status and spat settlement trends are described within each breeding area as weil as advances in genetic research.
Tipo: Text
Palavras-chave: Bivalves; Ostrea edulis; Bonamia ostreae; Marteilia refringens; Epidemiologie; Pathologie; Génétique; Echantillonnage; Elevage; Bivalves; Ostrea edulis; Bonamia ostreae; Marteilia refringens; Epidemiology; Pathology; Genetic; Sampling; Breeding.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00427/53822/54813.pdf

Genetic diversity of the European oyster (Ostrea edulis L.) in Nova Scotia: Comparison with other parts of Canada, Maine and Europe and implications for broodstock management
Provedor de dados: 5
Autores: Vercaemer, Bénédikte; Spence, Koren R.; Herbinger, Christophe; Lapegue, Sylvie; Kenchington, Ellen L.
The European oyster (Ostrea edulis) was introduced to the Nova Scotia aquaculture industry 30 years ago using stocks imported from naturalized populations in Maine whose ancestors originated in the Netherlands. This study used 5 microsatellites to assess the level of genetic diversity in several hatchery stocks and naturalized populations from Nova Scotia, New Brunswick, British Columbia and Maine. Some genetic erosion was shown to have occurred in the Maritimes populations, with the largest loss of alleles being experienced by the hatchery stocks. In spite of this loss, genetic diversity and heterozygosity in the Maritimes populations are still relatively high. Relationships within and between the populations and the existence of kin groups within the...
Tipo: Text
Palavras-chave: Genetic diversity; Maine; Microsatellites; Flat oyster; European oyster; Ostrea edulis.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2121.pdf

A first linkage map for the European flat oyster, Ostrea edulis towards the identification of Bonamia resistance QTLs
Provedor de dados: 5
Autores: Lallias, Delphine; Beaumont, Andy; Haley, Chris; Heurtebise, Serge; Boudry, Pierre; Lapegue, Sylvie.
The flat oyster Ostrea edulis is an endemic European oyster species, found on both Atlantic and Mediterranean coasts. Its aquacultural production has dramatically decreased due to two successive diseases caused by the intracellular parasites Marteilia refringens and Bonamia ostreae. Since 1985, Ifremer has undertaken a breeding program to produce oyster families which are tolerant to Bonamia. In this context, a genetic map was therefore established as a basis for Quantitative Trait Loci (QTLs) analysis. The reference family was an F2 family coming from a first bi-parental cross between a wild oyster and an individual from the fifth generation inbred line of the Bonamia tolerance selection program. This inbred line had shown no mortality when reared in...
Tipo: Text
Palavras-chave: Parasite; Bonamia ostreae; Bonamiosis; QTL; Genetic; Ostrea edulis; Flat oyster.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3459.pdf

Extension de la maladie de la glande digestive de l'huître plate en Bretagne
Provedor de dados: 5
Autores: Tige, Gilbert; Morel, Marc.
Depuis plusieurs années, l'huître plate O. edulis, cultivée en France est atteinte d'une maladie de la glande digestive. Jusqu'à la fin de l'été 1973, les élevages de l'Aber Benoît, de l'Aber Wrach et de la Penzé étaient les seuls qui, en Bretagne, fussent parasités (Grizel et Tigé, 1973). Depuis, la situation a très nettement évolué. A la fin de l'année 1973, l'épizootie a gagné les secteurs ostréicoles de Morlaix et d'une partie de la rade de Brest ; elle s'est étendue d'avril à juin 1974 à la quasi totalité des autres centres d'élevage. Nous rapporterons ici les observations faites depuis 1973.
Tipo: Text
Palavras-chave: Pathologie; Huître plate; Ostrea edulis; Glande digestive; Bretagne.
Ano: 1974
URL: http://archimer.ifremer.fr/doc/00015/12628/9516.pdf

Etude de la dynamique des populations zooplanctoniques au sein d'une claire ostréicole
Provedor de dados: 5
Autores: Sajus, Marie-celine.
Marteilia refringens est un protozoaire parasite de l'huître plate Ostrea edulis, à l'origine de mortalités dramatiques en élevage depuis les années 1970. En zone endémique, le seul moyen de contrôle de la marteiliose, est une gestion du risque de contamination. Dans ce cadre, la connaissance du cycle parasitaire de Marteilia refringens est primordiale. Les travaux réalisés à ce sujet ont permis de poser l'hypothèse d'un cycle hétéroxène. Le parasite a été détecté par PCR puis localisé au sein des tissus par hybridation in situ au sein d'une espèce de copépode Calanoide prélevée dans une claire ostréicole. A ce stade, cette espèces peut être considéré comme un hôte de Marteilia refringens. Notre étude consistait à mettre en évidence la dynamique des...
Tipo: Text
Palavras-chave: Marteilia refringens; Parasitologie; Huître plate; Ostrea edulis; Eau de mer; Zooplancton; Claires ostréicoles.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00032/14351/11635.pdf

Elevages de bivalves à partir de naissain d'écloseries dans les claires du bassin de Marennes-Oléron
Provedor de dados: 5
Autores: Gras, Paul; Gras, Marie-paule.
Des élevages expérimentaux d'huîtres plates Ostrea edulis et de palourdes Ruditapes decussatus et Ruditapes philippinarum ont été réalisés dans les claires à huîtres du bassin de Marennes-Oléron à partir de naissain provenant d'écloserie. Les croissances pondérale et linéraire et le pourcentage de mortalité ont été étudiés. Les premiers résultats obtenus sont encourageants, et, plusieurs ostréiculteurs ont commencé, cette année, avec notre assistance, la culture des palourdes dans leurs claires à huîtres.
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Palourde; Ostrea edulis; Ruditapes decussatus; Ruditapes philippinarum; Claire ostréicole; Marennes Oléron; Charente Maritime.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00009/12010/8702.pdf

Optimisation de la méthode de quantification de l'infection à Bonamia ostreae chez l'huître plate Ostrea edulis par P.C.R. quantitative
Provedor de dados: 5
Autores: Dupin, Clément.
Le Laboratoire de Génétique et de Pathologie a développé un programme de recherche concernant la bonamiose, maladie due au protiste Bonamia ostreae. Le diagnostic de la maladie repose essentiellement sur deux techniques (histologie et la cytologie par apposition de tissus cardiaque), cependant la sensibilité de ces technique reste relativement faible. C'est pourquoi il est nécessaire de mettre au point une technique plus sensible, afin de pouvoir établir un diagnostic plus précoce de la maladie. Notre étude a porté sur le développement et la mise au point de la méthode de PCR quantitative sur une portion du gène de l'actine I de Bonamia ostreae récemment caractérisé. Les résultats obtenus ont permis de sélectionner le couple d'amorces les plus efficace...
Tipo: Text
Palavras-chave: Bonamia ostreae; Ostrea edulis; PCR-Q; Clonage; Prémix Brillant (R); Réaction de polymérisation en chaîne (P.C.R.); Extraction d'ADN; Référence dye; Quantification absolue.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00368/47913/47942.pdf

Croissance et indice de condition de l'huître plate Ostrea edulis élevée en mer et en étang sur la côte méditerranéenne
Provedor de dados: 5
Autores: Paquotte, Philippe; Moriceau, Jacques.
A monitoring of the growth and condition index of the flat oyster Ostrea edulis has been conducted in the Thau Lagoon and in open sea off the Cap d'Agde. Between April and November, its growth is greater in open sea than in the lagoon. In winter, the growth doesn't stop in open sea, but one needs to get away from mussel collection in practicing seabed farming. In these conditions, the oyster's growth, throughout the year, is very close in open sea and in lagoons whereas the condition index is higher in open sea.
Tipo: Text
Palavras-chave: Méditerranée; Mer ouverte; Etang de Thau; Indice de condition; Croissance; Ostrea edulis.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-6188.PDF

Influence de la température sur la filtration et la consommation d'oxygène de l'huître plate Ostrea edulis: détermination des coefficients allométriques
Provedor de dados: 5
Autores: Haure, Joel; Penisson, Christian; Bougrier, Serge; Baud, Jean-pierre.
La filtration et la consommation d'oxygène d'Ostrea edulis ont été mesurées à différentes températures (10°-30°C) sur des individus de 5 à 120g de poids total (0,1 à 2,7g de poids sec) et hors période de gamétogénèse. Pour chaque température, la relation allométrique entre la réponse physiologique et le poids sec de l'animal (W) a été estimée selon la relation: y=aWb. Un modèle statistique est proposé pour expliquer la filtration ou la consommation d'oxygène (y) en fonction de la température (T) et du poids sec de l'animal (W): y=[a+(b.cT)]. Wd.d est égal à 0,62 pour la filtration et à 0,74 pour la consommation d'oxygène. Les deux fonctions physiologiques augmentent avec l'élévation de la température et atteignent leur maximum à 30°C ( Filtration:...
Tipo: Text
Palavras-chave: Filtration; Consommation oxygène; Poids sec; Température; Ostrea edulis.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00048/15886/13308.pdf

Concomitant herpes-like virus infections in hatchery-reared larvae and nursery-cultured spat Crassostrea gigas and Ostrea edulis
Provedor de dados: 5
Autores: Renault, Tristan; Le Deuff, Rose-marie; Chollet, Bruno; Cochennec, Nathalie; Gerard, Andre.
Concomitant sporadic high mortalities were reported in France in May 1994 among batches of hatchery-reared larval Pacific oysters Crassostrea gigas and European flat oysters Ostrea edulis in 2 hatcheries, and in June and July 1994 among batches of cultured spat of both species in a shellfish nursery. Histological observation showed the presence of cellular abnormalities in moribund animals. Transmission electron microscopy revealed the presence of herpes-like virus particles in infected larvae and spat of both oyster species. This is the first description of a herpes-like virus infection in larval O.. edulis. Viruses observed in diseased larvae and spat of both species are similar with respect to ultrastructure and morphogenesis, They were detected...
Tipo: Text
Palavras-chave: Apoptosis; Virus replication; Concomitant infection; Oyster mortality; Crassostrea gigas; Pacific oyster; Ostrea edulis; European flat oyster; Herpes like virus.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-820.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

Bonamia ostreae and Ostrea edulis : a stable host-parasite system in France?
Provedor de dados: 5
Autores: Arzul, Isabelle; Miossec, Laurence; Blanchet, Estelle; Garcia, Celine; Francois, Cyrille; Joly, Jean-pierre.
Bonamiosis due to the intrahaemocytic protistan parasite Bonamia ostreae is a European endemic disease affecting flat oysters Ostrea edulis. After its first description in June 1979 in L'Ile Tudy, Brittany, the parasite rapidly spread to all French oyster farming areas and in other European countries through transfers of live molluscs. Bonamiosis and marteiliosis, another protozoan disease appeared in the seventies, drastically reduced the French flat oyster production from 20 000 tonnes in 1970 to less than 2000 tonnes after 1981. In 2001, about 1650 t of flat oysters were marketed in France. The production is restricted to several areas specialised in reproduction, growth and/or marketing, and depends on transfers of animals. Most important production...
Tipo: Text
Palavras-chave: Bonamia ostreae; Parasitology; Pathology; Ostrea edulis; Oyster.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-6381.pdf

Variance of reproductive success in the European flat oyster Ostrea edulis assessed by microsatellite-based parentage analyses in a natural population and in hatchery
Provedor de dados: 5
Autores: Lallias, Delphine; Taris, Nicolas; Boudry, Pierre; Bonhomme, Francois; Lapegue, Sylvie.
he European flat oyster (Ostrea edulis L.) is a marine bivalve whose natural geographical distribution ranges along the European Atlantic coast from Norway to Morocco, in addition to the Mediterranean and Black Sea. Previous studies of allozymes, microsat-ellites and mitochondrial differentiation over the whole range concluded that a significant divergence existed between Mediterranean and Atlantic populations, together with an isolation-by-distance pattern. However, the average mitochondrial haplotypic diversity displayed a high among populations variance, reflecting smaller effective population size in some locations. Additionally, a ten-fold quantitative difference was observed in the same study in Fst between the mitochondrial and the nuclear genomes,...
Tipo: Text
Palavras-chave: Genotypes; Genetic diversity; Breeding success; Allozymes; Population genetics; Parentage analyses; Natural population; Ostrea edulis; Oyster.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3334.pdf

Mise au point d'outils moléculaires pour le diagnostic des parasites de type « Mikrocells » chez l'huître
Provedor de dados: 5
Autores: Kerdudou, Nolwenn.
Tipo: Text
Palavras-chave: Protozoa; Parasite identification; Ostrea edulis.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-1764.pdf

Développement et cycle du parasite responsable de l'épizootie de l'huître plate Ostrea edulis L.
Provedor de dados: 5
Autores: Grizel, Henri.
The description, in light microscopy, of the different stages of the evolution of the Ostrea edulis digestive gland parasite enabled the highlighting of an annual evolution cycle in sick oyster populations.
Tipo: Text
Palavras-chave: Ostrea edulis; Huître plate; Pathologie; Parasitologie.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/acte-6167.PDF

Etude des interactions hôte/parasite chez l'huître plate Ostrea edulis et son parasite Bonamia ostreae
Provedor de dados: 5
Autores: Morga, Benjamin.
The history of the French oyster production highlights the fragility of this production against overexploitation and disease outbreaks. In particular, the production of flot oyster, Ostrea edulis, has decreased following the emergence of two parasitic diseases including bonamiosis. The means to fight against bonamiosis are relatively limited. They are mainly based on oyster health surveillance to limit the spread of the disease. However, the use of predictive models of disease progression in infected area would help to improve stock management and minimize the impact pathogens. Moreover the development of resistant animais could help to revive this production. These different approaches require appropriate diagnostic tools, a good knowledge of the life...
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Bonamiose; Bonamia ostreae; Interaction hôte-parasite; Expression; Résistance; Hémocytes; Hybridation soustractive suppressive; Flat oyster; Ostrea edulis; Bonamiosis; Bonamia ostreae; Interaction host-parasite; Expression; Resistance; Haemocytes; Suppressive subtractive hybridization.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00055/16664/14157.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

Infection with the protozoan parasite Bonamia ostreae modifies in vitro haemocyte activities of flat oyster Ostrea edulis
Provedor de dados: 5
Autores: Morga, Benjamin; Arzul, Isabelle; Chollet, Bruno; Renault, Tristan.
Bonamia ostreae is an intracellular protozoan parasite, infecting haemocytes of the European flat oyster Ostrea edulis. Oyster defence mechanisms mainly rely on haemocytes. In the present study in vitro interactions between parasites and flat oyster haemocytes were investigated using flow cytometry and light microscopy. Haemocyte parameters including: non specific esterase activity, reactive oxygen species (ROS) production and phagocytosis were monitored using flow cytometry after 2 hour cell incubation with live and dead B. ostreae. Two ratios of parasites per haemocyte were tested (5:1 and 10:1), haemocytes alone were used as controls and the experiment was carried out three times. Flow cytometry revealed a decrease of non specific esterase activities...
Tipo: Text
Palavras-chave: Reactive oxygen species (ROS); Esterase; Flow cytometry; Haemocytes; Ostrea edulis; Bonamia ostreae.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6271.pdf

Effects of temperature and salinity on the survival of Bonamia ostreae parasite infecting falt oyster Ostrea edulis in sea water
Provedor de dados: 5
Autores: Arzul, Isabelle; Bond, Celine; Gagnaire, Beatrice; Chollet, Bruno; Morga, Benjamin; Ferrand, Sylvie; Robert, Maeva; Renault, Tristan.
Bonamiosis due to the intrahaemocytic protistan parasite Bonamia ostreae is a European endemic disease affecting flat oysters Ostrea edulis. The parasite has been described in different ecosystems from estuaries to open sea and no clear correlations could be demonstrated between the development of the disease and environmental parameters such as temperature or salinity. The parasite life cycle, including its survival outside the host is not completely known. Nevertheless, the infection can be directly transmitted by cohabitation between infected and non infected oysters suggesting that the parasite does not need intermediate host to complete its cycle. In the present study, the impact of temperature and salinity on the survival of purified parasites...
Tipo: Text
Palavras-chave: Effects; Temperarature; Salinity; Bonamia ostreae; Parasite; Pathology; Flat oyster; Ostrea edulis; Oyster.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3375.pdf

Etude de la dynamique du parasite Marteilia refringens chez son hôte Ostrea edulis
Provedor de dados: 5
Autores: Barnaud, Antoine.
Après une synthèse des principaux agents pathogènes en conchyliculture, l'auteur présente le protozoaire Marteilia refringens, parasite majeur de l'huître plate Ostrea edulis en Europe, dont le cycle reste inconnu. Suit une étude expérimentale de la dynamique du parasite dans l'huître, intégrée à un modèle d'étude de la marteiliose en claire ostrécole, montrant l'existence d'une fenêtre temporelle d'infection et aboutissant à une nouvelle hypothèse de cycle parasitaire. Ces résultats sont enfin mis en relation avec la détection récente de Marteilia refringens dans le copépode Acartia grani, hôte intermédiaire potentiel.
Tipo: Text
Palavras-chave: Marteilia refringens; Ostrea edulis; Huître; Conchyliculture; Pathologie; Paramyxea.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00109/22038/19683.pdf

Nursery function of coastal temperate benthic habitats: New insight from the bivalve recruitment perspective
Provedor de dados: 5
Autores: Barbier, Pierrick; Meziane, Tarik; Foret, Martin; Tremblay, Rejean; Robert, Rene; Olivier, Frederic.
Marine habitat function has been typically investigated in terms of biogeochemical regulation but rarely in terms of population renewal, which is mainly controlled by recruitment dynamics. The recruitment phase is crucial for organisms with a bentho-pelagic life cycle, such as bivalves, and it regulates the population renewal success. This study provides new insight on the role of temperate benthic habitats on bivalve recruitment, as a function of nursery areas. Six dominant benthic habitats of the Chausey archipelago (Normandy, France) were studied. In each habitat, bivalve recruit assemblages were described at the end of two reproductive seasons. Furthermore, Ostrea edulis juveniles were immerged on each habitat during two months to compare growth...
Tipo: Text
Palavras-chave: Benthic habitats; Bivalve recruitment; Nursery function; Ostrea edulis; Fatty acids.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00367/47863/47845.pdf

Influence of feeding regime and temperature on development and settlement of oyster   Ostrea edulis   (Linnaeus, 1758) larvae
Provedor de dados: 5
Autores: Robert, Rene; Vignier, Julien; Petton, Bruno.
Under controlled conditions of food density and temperature, larval performances (ingestion, growth, survival and settlement success) of the flat oyster, Ostrea edulis, were investigated using a flow-through rearing system. In the first experiment, oyster larvae were reared at five different phytoplankton densities (70, 500, 1500, 2500 and 3500 μm3 μL−1: ≈1, 8, 25, 42 and 58 cells μL−1 equivalent TCg), and in the second, larvae were grown at four different temperatures (15, 20, 25 and 30°C). Overall, larvae survived a wide range of food density and temperature, with high survival recorded at the end of the experiments. Microalgae concentration and temperature both impacted significantly larval development and settlement success. A mixed diet of Chaetoceros...
Tipo: Text
Palavras-chave: Ostrea edulis; Larvae; Temperature; Feeding regime; Flow-through; DEB parameters.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00377/48817/49295.pdf

L'évolution de la maladie de la glande digestive de l'huître plate dans le bassin d'Arcachon et ses conséquences actuelles
Provedor de dados: 5
Autores: Tige, Gilbert; His, Edouard; Rabouin, Marie-agnès.
Nous avions montré qu'en 1975 la maladie de la glande digestive de l'huître plate était responsable d'une mauvaise qualité et de mortalités importantes d'huîtres plates du bassin d'Arcachon (His &amp; coll., 1976). L'étude des populations autochtones, captées successivement au cours des étés de 1974, 1975 et 1977 a été entreprise de mai 1977 à Janvier 1979. La croissance des huîtres redevient satisfaisantes ces dernières années; la qualité des mollusques s'améliore; les mortalités sont peut importantes. Le phénomène est plus sensible chez les populations les plus jeunes. Parallèlement nous notons une régression de la parasitose, tant au niveau des taux que des intensités de l'infestation.
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Maladie; Mortalité; Arcahon.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/00015/12627/9515.pdf

A high load of non-neutral amino-acid polymorphisms explains high protein diversity despite moderate effective population size in a marine bivalve with sweepstakes reproduction
Provedor de dados: 5
Autores: Harrang, Estelle; Lapegue, Sylvie; Morga, Benjamin; Bierne, Nicolas.
Marine bivalves show among the greatest allozyme diversity ever reported in Eukaryotes, putting them historically at the heart of the neutralist-selectionist controversy on the maintenance of genetic variation. Although it is now acknowledged that this high diversity is most probably a simple consequence of a large population size, convincing support for this explanation would require a rigorous assessment of the silent nucleotide diversity in natural populations of marine bivalves, which has not yet been done. This study investigated DNA sequence polymorphism in a set of 37 nuclear loci in wild samples of the flat oyster Ostrea edulis. Silent diversity was found to be only moderate (0.7%), and there was no departure from demographic equilibrium under the...
Tipo: Text
Palavras-chave: Nucleotide; Polymorphism; Marine bivalve; Deleterious; Mutations; Genetic load; Ostrea edulis.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00125/23610/21444.pdf

Production artificielle de naissain de mollusques, Ostrea edulis, Haliotis tuberculata
Provedor de dados: 5
Autores: Flassch, Jean-pierre; Koike, Y.; L'Herroux, Michel; Aveline, C.
Ce problème pouvait être abordé de deux façons différentes; il était en effet possible soit de s'orienter vers les technIques Japonaises (expérimentations en semi-intensif avec utilisation de grands volumes supérieurs au m3 , procédés donnant des résultats Immédiats mais à reproductivité incertaine, emploi d'une main-d'oeuvre nombreuse et peu spécialisée), soit d'adopter pour le système clos à forte production contrôlée (mis en oeuvre assez longue, investissement immédiat plus important, utilisation en série de petits volumes à forte concentration, nourriture naturelle produite artificiellement et donnée en quantité connue, main-d'oeuvre peu abondante mais très spécialisée) . Pour une meilleure connaissance des problèmes et pour une adaptation future plus...
Tipo: Text
Palavras-chave: Reproduction artificielle; Naissain; Larves; Molluques; Ostrea edulis; Haliotis tuberculata; Artificial production; Larvae; Mollusca; Ostrea edulis; Haliotis tuberculata.
Ano: 1974
URL: http://archimer.ifremer.fr/doc/00021/13250/10292.pdf

Approche in vitro et in vivo des interactions hémocytes/parasite Bonamia ostreae, chez l'huître plate Ostrea edulis
Provedor de dados: 5
Autores: Denoix, Michael.
Depuis la fin des années soixante, la conchyliculture française doit faire face à des mortalités importantes d'huître plate, Ostrea edulis, causées entre autres, par le protozoaire, Bonamia ostreae, responsable de la bonamiose. Peu de moyens sont à l'heure actuelle à la disposition des professionnels pour lutter contre cette maladie. L'obtention d'animaux résistants à cette infection est une voie retenue et explorée par l'Ifremer pour combattre la bonamiose et tenter d'apporter des solutions aux conchyliculteurs. Dans cette optique, l'Ifremer, a entrepris un programme de sélection pour obtenir des animaux résistants en exerçant une pression de sélection par inoculation de parasites purifiés dans la cavité péricardique d'animaux anesthésiés. Les premières...
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Bonamia ostreae; Hemocyte; Parasite.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00033/14443/11742.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

Comparison of haemocytic parameters among flat oyster Ostrea edulis stocks with different susceptibility to bonamiosis and the Pacific oyster Crassostrea gigas
Provedor de dados: 5
Autores: Comesana, Pilar; Casas, Sandra M.; Cao, Asuncion; Abollo, Elvira; Arzul, Isabelle; Morga, Benjamin; Villalba, Antonio.
Farming of the flat oyster Ostrea edulis in Europe is severely constrained by the protozoan Bonamia ostreae. The introduction of the resistant species Crassostrea gigas has been a relief for the farmers, while the pilot programmes to select O. edulis strains resistant to bonamiosis performed in various countries can be seen as a promising strategy to minimise the effects of bonamiosis. However, the physiological bases of this differential susceptibility remain unknown. A search for an explanation of the intra and interspecific differences in oyster susceptibility to bonamiosis was accomplished by comparing some immune parameters among various O. edulis stocks and C gigas. On December 2003, naive and Bonamia-relatively resistant flat oysters from Ireland....
Tipo: Text
Palavras-chave: Ostrea edulis; Crassostrea gigas; Bonamia ostreae; Haemocyte; Phagocytosis; Respiratory burst; Nitric oxide.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00074/18501/16092.pdf

Historique, expériences en cours et perspectives du programme de sélection de l'huître plate Ostrea edulis pour la résistance à la bonamiose
Provedor de dados: 5
Autores: Barre, Marc; Naciri, Yamama; Boudry, Pierre; Goyard, Emmanuel; Launey, Sophie; Cochennec, Nathalie; Heurtebise, Serge; Ledu, Christophe; Phelipot, Pascal; Gerard, Andre.
The Aquaculture and Pathological Genetics (GAP) laboratory at La Tremblade has been monitoring three populations of European flat oyster since 1985 or 1989 under selection for higher survival rates in the presence of the parasite Bonamia ostrea. One selection cycle (1985 population) or two (1989 populations) were carried out by mass selection by placing the oysters for several years in a highly infested zone, and then harvesting spawns from survivors.
Tipo: Text
Palavras-chave: Huîtres plates; Génétique; Selection génétique; Ostrea edulis.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-3244.pdf

La fixation en claires des larves de l'huître plate Ostrea edulis
Provedor de dados: 5
Autores: Trochon, Pierre.
La reproduction des huîtres plates dans les claires de la région de La Tremblade a été étudiée à partir de l'année 1953. Les premières observations permirent de constater dans ces plans d'eau la présence de larves en grand nombre au début de l'été ; mais la quantité des larves parvenues au stade de fixation demeurait toujours très faible. Néanmoins, sur des collecteurs immergés aux moments les plus favorables, de très faibles fixations furent obtenues. Il était donc démontré qu'il était possible de récolter des huîtres plates dans ces bassins.
Tipo: Text
Palavras-chave: Reproduction; Huître plate; Ostrea edulis; Claires ostréicole; Marennes Oléron.
Ano: 1956
URL: http://archimer.ifremer.fr/doc/00005/11578/8203.pdf

Individual monitoring of gonad development in the European flat oyster Ostrea edulis by in vivo magnetic resonance imaging
Provedor de dados: 5
Autores: Davenel, Armel; Gonzalez, Ricardo; Suquet, Marc; Quellec, Stephane; Robert, Rene.
Previous studies have shown that magnetic resonance imaging is a very appropriate non-invasive technique for quantifying the growth of somatic and gonadic tissues and sex determination in the Pacific oyster, Crassostrea gigas. Despite a thinner gonad, harder to distinguish than that of the Pacific oyster, we showed in this study that it was possible to distinguish and quantify the development of the gonad of the European flat oyster, Ostrea edulis, using a 3D MRI sequence with a suitable finer resolution. Compared to T2-weighted images, theoretically the most appropriate for good anatomical description, T1-weighted images were more suited to gonad observation. The gonad development was quantified by the number of voxels with higher grey level. Larvae were...
Tipo: Text
Palavras-chave: Oyster; Ostrea edulis; Gonad development; Magnetic resonance imaging.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00014/12508/9363.pdf

Etude des recentes epizooties de l'huitre plate Ostrea Edulis Linne et de leur impact sur l'ostreiculture bretonne
Provedor de dados: 5
Autores: Grizel, Henri.
The study concerns two previously unseen Protozoa, Marteilia refringens and Bonamia ostreae, responsible for epizootics in the flat oyster, Ostrea edulis L. The epizootiological aspect, the impact of diseases on Breton oyster farming and the research for appropriate prophylaxes is addressed. The morphology, the ultrastructure and certain phases of the growth cycle are described for the two parasites, as well as their cyto- and histopathogenic effects. The epizootiology explains the evolution of the diseases in space and time, their conditions for propagating, the sensitivity of the parasites and the receptivity of various test hosts. A summary analysis of Breton oyster farming before and during the epizootic is done. It makes it possible to judge the...
Tipo: Text
Palavras-chave: Impact; Prophylaxies; Epizootiologie; Bonamia ostreae; Martelia refrengens; Protozoaires; Epizooties; Ostrea edulis; Huître plate; Ostréiculture; Bretagne.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/these-2581.pdf

Establishment of a genetic map in the European flat oyster Ostrea edulis L.
Provedor de dados: 5
Autores: Lallias, Delphine; Boudry, Pierre; Heurtebise, Serge; Lapegue, Sylvie; Beaumont, Andy.
The flat oyster Ostrea edulis is the species endemic from European coasts, Atlantic and Mediterranean. It has been exploited since Roman times in Europe. But its production decreased from around 20000 tons in the 1950ies to 1500 tons nowadays because of two successive diseases due to the intracellular parasites Marteilia refringens and Bonamia ostreae. Since 1985, Ifremer initiated a program of selection to produce families of oysters tolerant to Bonamia. In this context, a further step is to identify QTLs of resistance to this parasite. Therefore, a genetic map is first now being built. The establishment of a genetic linkage map will represent the basement for the mapping of QTLs, with the ultimate objective to implement marker-assisted selection in O....
Tipo: Text
Palavras-chave: Genetic map; Ostrea edulis; Genetic; European flat oyster.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3472.pdf

Population genetics of the European flat oyster (Ostrea edulis) : from larvae to populations
Provedor de dados: 5
Autores: Boudry, Pierre; Launey, Sophie; Diaz-almela, E.; Naciri-graven, Yamama; Ledu, Christophe; Mira, Sara; Taris, Nicolas; Bonhomme, Francois; Lapegue, Sylvie.
Nowadays, PCR-based DNA markers allow the study of diversity and differentiation of marine organisms at different stages of their life cycle. Our study of European flat oyster (Ostrea edulis) populations has aimed to describe their spatial and temporal dynamics. First, we analyzed adults sampled over the natural range of the species.  An Atlantic/Mediterranean differentiation pattern was observed. Results were congruent between allozymes, microsatellites and mitochondrial DNA and  support an isolation by distance model. High variability was observed in the breadth of diversity between populations using a mitochondrial marker, this highlights the small effective population sizes in some locations. A 10-fold quantitative difference was observed in Fst...
Tipo: Text
Palavras-chave: Larvae; Reproduction; Genetic; Ostrea edulis; European flat oyster; Population genetics.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/acte-3493.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

Premiers essais d'une nouvelle technique de captage d'huîtres plates en Baie de Quiberon
Provedor de dados: 5
Autores: Grizel, Henri; Langlade, Aime; Perodou, Jean-bernard.
Some observations on spat collection, carried out in 1976 and 1977, lead us to use mussel shells in suspension. In 1978, while bottom collection, in deep water farms, had been very bad, large quantities of spat were collected using our method. The sectors used, the percentage of collecting mussel shells and the amount of spat par shell are indicated in this note.
Tipo: Text
Palavras-chave: Naissain; Captage; Ostrea edulis; Huître plate.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/acte-6288.PDF

Relance de l'huître plate. Rapport d'avancement des travaux 1988.
Provedor de dados: 5
Autores: IFREMER (LA TRINITE/MER - LA TREMBLADE).
Un contrat de Plan État-Région Bretagne a été signé en 1983 pour financer des recherches sur la période 1984-1988 dans le but de permettre la relance de l'élevage de l'huître plate, à la suite de la deuxième épizootie due à un protozaire, Bonamia ostreae. Ce rapport présente les travaux réalisés et les résultats acquis durant l'année 1988, dans les domaines de la pathologie (étude de la maladie et des mécanismes de défense des mollusques) de la génétique (recherche de souches résistantes), de l'épidémiologie descriptive et de la zootechnie.
Tipo: Text
Palavras-chave: Bivalves; Ostrea edulis; Bonamia ostreae; Épidémiologie; Pathologie; Immunologie; Échantillonnage; Élevage; Shellfish; Ostrea edulis; Bonamia ostreae; Epidemiology; Pathology; Immunology; Sampling; Rearing.
Ano: 1989
URL: https://archimer.ifremer.fr/doc/00342/45284/44749.pdf

Contribution of in Vivo Experimental Challenges to Understanding Flat Oyster Ostrea edulis Resistance to Bonamia ostreae
Provedor de dados: 5
Autores: Morga, Benjamin; Renault, Tristan; Faury, Nicole; Lerond, Sophie; Garcia, Celine; Chollet, Bruno; Joly, Jean-pierre; Lapegue, Sylvie; Harrang, Estelle; Arzul, Isabelle.
Bonamiosis due to the parasite Bonamia ostreae has been associated with massive mortality outbreaks in European flat oyster stocks in Europe. As eradication and treatment are not possible, the control of the disease mainly relies on transfer restriction. Moreover, selection has been applied to produce resistant flat oyster families, which present better survival and lower prevalence than non-selected oysters. In order to better understand the mechanisms involved in resistance to bonamiosis, cellular and molecular responses of 2 oyster groups (selected oysters and wild-type oysters) were analyzed in the context of experimental injection and cohabitation infections. Cellular responses including non-specific esterases detection, ROS production and...
Tipo: Text
Palavras-chave: Bonamia ostreae; Protozoan; Ostrea edulis; Resistance; Experimental infection; Haemocytes; Gene expression; Apoptosis.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00405/51665/52213.pdf

Essais de captage d'huître plate avec de nouveaux types de collecteurs
Provedor de dados: 5
Autores: Martin, Anne-genevieve; Grizel, Henri; Langlade, Aime.
Malgré l'augmentation du coût de la main d'oeuvre au cours des dernières années, il a été constaté une diminution du prix du naissain capté d'une manière traditionnelle à l'aide de tuiles chaulées. Le besoin de rechercher des collecteurs aussi performants que la tuile mais surtout plus facilement maniables et d'un coût moins élevé s'est fait de plus en plus ressentir dans la profession ostréicole. Les deux nouveaux types de collecteurs étudiés semblent, sous réserve de modifications, réclamer moins de manipulations que la tuile. Ceci pourrait se traduite par une diminution du prix de production du naissain
Tipo: Text
Palavras-chave: Collecteur; Ostrea edulis; Huître plate; Naissain; Captage; Reproduction.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/acte-5016.PDF

Maladie de la glande digestive de l'huître plate - Etude histochimique
Provedor de dados: 5
Autores: Morel, Marc; Tige, Gilbert.
The histochemical study conducted here aims to bring to light the different biochemical components of the parasite. We carried out a series of analyses focusing on the main features known to this parasite: basic "primary" cell (stage 1), included "secondary" cells (stage 2), groups of "secondary" cells isolated by a membrane with or without "refracting clusters" (stage 4 and 3). The results of these histochemical tests are described in this work.
Tipo: Text
Palavras-chave: Histochimie; Pathologie; Maladie; Ostrea edulis; Huître.
Ano: 1974
URL: http://archimer.ifremer.fr/doc/1974/publication-6287.PDF

The effects of eight single microalgal diets on sex-ratio and gonad development throughout European flat oyster (Ostrea edulis L.) conditioning
Provedor de dados: 5
Autores: Gonzales, Ricardo; Quillien, Virgile; Robert, Rene.
To determine the effects of food quality on Ostrea edulis reproduction, European flat oysters were conditioned during two sets of experiments, carried out in spring and autumn, during 40 days at 19 degrees C, in 50 l transparent flow-through tanks, in triplicate, and fed constantly at 900 mu m(3) mu l(-1), with eight different types of microalgae. Four species were fed per group of trials: Isochrysis affinis galbana, Chaetoceros gracilis, Skeletonema marinoi, and Tetraselmis suecica were fed to flat oysters in the first set; whereas Rhodomonas salina, Thalassiosira weissflogii, Thalassiosira pseudonana, and Pavlova lutheri were provided during the second set of experiments. At the beginning and end of both conditioning periods, oysters were sampled and...
Tipo: Text
Palavras-chave: Ostrea edulis; Broodstock conditioning; Gametogenesis; Microalgal diets.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00144/25497/24163.pdf

Bonamia ostreae (Pichot et Coll., 1979) parasite de l'huître plate : comparaison de deux méthodes de diagnostic
Provedor de dados: 5
Autores: Bachere, Evelyne; Durand, Jean-louis; Tige, Gilbert.
The parasite, Bonamia ostreae, was diagnosed in several South Brittany flat oyster's samples, from gills tissues's prints, stained in May-Grunwald-Giemsa and from corresponding digestive glands sections. The comparaison of results shows quantitative differences relating to the infested oyster's rate, and qualitative differences relating to the early stages of infestation. Gill's print technic seems more intersting for the only Bonamia ostreae diagnosis.
Tipo: Text
Palavras-chave: Pathologie; Parasite; Huître plate; Ostrea edulis; Bonamia ostreae.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/acte-5013.PDF

Culture in vitro de Bonamia ostreae parasite hémocytaire de l'huître plate Ostrea edulis L.
Provedor de dados: 5
Autores: Comps, Michel.
The development of Bonamia ostreae, a parasite responsible for an important disease in the flat oyster plate Ostrea edulis, has been achieved in vitro through the contamination of cultures of explanted oyster tissues. A description of the cultured parasite's cytological characteristics is provided.
Tipo: Text
Palavras-chave: Ostrea edulis; Huître plate; Parasite; Bonamia ostreae; Pathologie.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/publication-6156.PDF

Etudes pathologiques et epidemiologiques des lesions parasitaires chez Ostrea edulis : Premiers resultats d'un recherche prospective comparative chez les principales especes de mollusques des zones ostreicoles de Bretagne nord
Provedor de dados: 5
Autores: Poder, M; Auffret, Mathieu; Balouet, G.
This paper is a contribution to the study of the Bonamia ostreae epizooty in french european oyster Ostrea edulis : parasite process (hemocytic parasitosis); experimental contaminations on parks and in tanks. First results of an epidemiological watch conducted in oyster culture sites show in molluks mytilidae, pectinidae, cardiidae, veneridae: the absence of Bonamia ostreae forms; the existence of different types of parasitism or commensalisus of inequal pathological importance and especially a parasite of the Marteilia genus in Tapes sp . digestive epithelium. Additionally, a new example of hemocytosercoma is observed in Cerastoderma edule .
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Tapes rhomboides; Tapes pullastra; Mytilus edulis; Cerastoderma edule; Ostrea edulis; Bivalvia; Marteilia; Bonamia ostreae; Comparative studies; Parasitic diseases; Commensalism; Parasitology; Marine mollusks; Epidemiology; Pathology; Pathologie; Mollusques; Bonamia ostreae; Epizootie; Ostrea edulis.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1182.pdf

Bonamia ostreae, parasite de l'huître plate, Ostrea edulis: sa position taxonomique parmi les parasites du groupe "microcell", analyses des interactions hôte/parasite chez plusieurs populations d'huîtres plates
Provedor de dados: 5
Autores: Besnard-cochennec, Nathalie.
Bonamia ostreae is the causative agent of hemocyte disease. It has been detected first during mortalities occured in Franc in 1979. Bonamiosis spread rapidly among oysters farming in France and Europ. Another species, Bonamia sp. has been detected in New Zealand and Australia. These paasites were both included in the "microcell" group. This group contains 2 others parasites, Mikrocytos mackini affecting Crassostrea gigas in British Columbia (Canada) and M. roughleyi affecing Saccostrea glomerata in Australia. Structural and molecular caracterisation of all these parasites were realised. Results show tha B. ostreae, B. sp., B. exitiosus. Molecular tools are available for genus detection, Bonamia spp. and Mikrocytos and species identification (B. ostreae, B....
Tipo: Text
Palavras-chave: Bonamia ostreae; Ostrea edulis; Taxonomie; Diagnotic; PCR; In situ hybridation; Hémocytes; Lectines; Phagocytose; Résistance; Bonamia ostreae; Ostrea edulis; Taxonomy; Diagnotic; PCR; In situ hybridization; Hemocytes; Lectins; Phagocytosis; Resistance.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00211/32223/30671.pdf

Diversité génétique et dynamique du recrutement chez l'huître plate Ostrea edulis L.
Provedor de dados: 5
Autores: Lapegue, Sylvie; Boudry, Pierre; Mira, Sara; Taris, Nicolas; Bonhomme, Francois.
In order to understand better some fundamental aspects of the bivalve biology, one has to pay attention to the variance of their breeding success, the time structure of the populations and their effective size. An abundant literature shows the existence of a heterozygote deficit as well as positive relationships between heterozygoty and fitness components. This last point is the subject of explanatory hypotheses which have never been clearly decided between until now. One of these hypotheses is the possible existence of a certain degree of inbreeding among those populations. This is only possible in the case of separated colonies coming from a small amount of spawners, thus creating blood relations between individuals recruited from the same area, and...
Tipo: Text
Palavras-chave: Reproducteur; Variabilité génétique; Génétique population; Diversité génétique; Ostrea edulis; Huître plate.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/acte-3494.pdf

Caractérisation de types hémocytaires dans l'hémolymphe de l'huître plate, Ostrea edulis, par classification robuste
Provedor de dados: 5
Autores: Segretin, Angelique.
Les méthodes de classification sont largement utilisées en vision par ordinateur et reconnaissance des formes. La classification floue a d'ailleurs montré de bonnes performances dans ces domaines, non seulement dans la reconnaissance de classes en volume, mais aussi pour des formes fines, des droites, des courbes, et également des surfaces. L'idée est d'utiliser la classification automatique pour tenter de caractériser des types hémocytaires présents dans l'hémolymphe de l'huître plate. Actuellement, trois types d'hémocyte ont été définis, mais la difficulté d'établir un classement des cellules dans ces trois groupes, laisse penser qu'ils ne sont pas exhaustifs. Différentes approches de classification ont été tentées sur des mesures morphométriques de...
Tipo: Text
Palavras-chave: Classification floue; Analyse d'image; Huître plate; Ostrea edulis; Hémocytes.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00033/14445/11744.pdf

Bonamia ostreae, parasite of the European flat oyster, Ostrea edulis, does not experimentally infect the Japanese oyster, Crassostrea gigas
Provedor de dados: 5
Autores: Renault, Tristan; Cochennec, Nathalie; Grizel, Henri.
The protozoan Bonamia ostreae (Ascetospora) is the etiological agent of bonamiosis, or hemocyte disease of the European fiat oyster, Ostrea edulis (Pichot et al., 1980). Since this infection was first reported from the coast of Brittany (Comps et al., 1980), the parasite has spread rapidly along the French Atlantic coasts (Grizel &amp; Tigé, 1982), and in the European countries including the UK, Holland, lreland and Spain (Bannister &amp; Key, 1982; Van Banning, 1982; Polanco et al., 1984). Under the EEC Council Directive 91/67, this parasitic protozoan is included in list II of Annex A. Serious pathogen agents for molluscs that should be obligatorily declared are placed in this list
Tipo: Text
Palavras-chave: Infection; Protozoan; Oyster; Ostrea edulis; Bonamia ostreae.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/publication-2892.pdf

Eléments concernant l'huître plate, Ostrea edulis
Provedor de dados: 5
Autores: Martin, Anne-genevieve.
La production française d'huîtres plates (Ostrea edulis) est assurée en majeure partie par les centres bretons. Le captage de cette espèce se fait essentiellement en Bretagne dans la baie de Quiberon et les rivières attenantes. Le laboratoire conchylicole ISTPM de La Trinité S/Mer consacre donc une partie de ses programmes, d'une part à l'étude de la reproduction de l'huître plate afin de déterminer la période favorable à la pose des collecteurs, d'autre part à l'évaluation du recrutement sur ces collecteurs.
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Reproduction; Captage; Recrutement.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00016/12704/9626.pdf

First report of a Mikrocytos-like parasite in European oysters Ostrea edulis from Canada after transport and quarantine in France
Provedor de dados: 5
Autores: Gagne, N; Cochennec, Nathalie; Stephenson, M; Mcgladdery, S; Meyer, G; Bower, S.
As part of a disease resistance experiment, 112 apparently healthy European flat oysters Ostrea edulis L. were exported from Canada (Nova Scotia) into France to test their susceptibility to Bonamia ostreae infection. Twelve oysters died in transit and 17 others died within 2 wk of laboratory quarantine acclimation. All oysters were examined histologically, and the 17 that died during quarantine were assayed for microcells (Bonamia sp. and Mikrocytos mackini) using molecular techniques. A microcell parasite was detected in the connective tissue of 5 of the 112 oysters. Morphological appearance, tissue affinity and molecular characterization through PCR, in situ hybridization (ISH), fluorescence in situ hybridization (FISH) and sequencing revealed a protist...
Tipo: Text
Palavras-chave: Histology; PCR; In situ hybridization; Ostrea edulis; Mikrocytos.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4475.pdf

Marqueurs microsatellites chez l'huître plate Ostrea edulis l. : caractérisation et applications à un programme de sélection pour une résistance au parasite Bonamia ostreae et à l'etude de populations naturelles
Provedor de dados: 5
Autores: Launey, Sophie.
The flat oyster Ostrea edulis L. is the indigenous oyster of the Atlantic as well as the Mediterranean coasts of Europe.  Its commercial exploitation dates back to Antiquity but its breeding is now threatened by two parasitic protozoa, among which Bonamia ostreae. Various aspects of the genetics of this species' natural and farmed populations have been studied with the aid of microsatellite markers.  At first, the implementation and the screening of two partial genomic libraries made it possible to identify 28 new microsatellite loci. Analysis of the segregation of 12 of these loci and of two enzymatic loci shows that most microsatellite loci are transmitted in a Mendelian way, but some loci have significant segregation distortions. Moreover, seven linkage...
Tipo: Text
Palavras-chave: Microsatellites markers; Parasite; Bonamia ostreae; Oyster; Ostrea edulis; Marqueurs microsatellites; Parasite; Bonamia ostreae; Huître; Ostrea edulis.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/these-1919.pdf

Faisabilité biologique de l'élevage intensif en bassin de l'huître plate Ostrea edulis
Provedor de dados: 5
Autores: Brault, Isabelle; Baud, Jean-pierre; Haure, Joel.
L'étude de faisabilité de l'élevage intensif de l'huître plate Ostrea edulis en bassin (enceinte contenant 8 niveaux de casiers d'élevage empilés) permet d'établir un premier bilan sur cette technique: Aspects positifs: - Obtention d'une croissance homogène quelque soit le niveau d'élevage dans la colonne d'eau durant les trois saisons étudiées (printemps, été, automne), - Adéquation entre la ration alimentaire de phytoplancton (Skeletonema costatum) et la densité de coquillages à trois tailles différentes (1.10(9) cellules de phytoplancton). Seule la densité de 400 individus par casier pour les juvéniles (P) pourrait être augmentée. Aspects négatifs: - Mise en évidence d'une relation décroissante entre le coefficient de croissance (G30) et la taille des...
Tipo: Text
Palavras-chave: Aquaculture intensive; Ostrea edulis; Skeletonema costatum.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00048/15876/13298.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

Etude des interactions entre l'huître plate Ostrea edulis et le parasite Bonamia ostreae en cytométrie en flux et en hybridation soustractive suppressive (SSH)
Provedor de dados: 5
Autores: Morga, Benjamin.
The French ostreiculture history highlights the fragility of its production caused by stocks overexploitation and diseases. Particularly, the flat oyster production decreased a lot after the appearance of two parasitic diseases: marteilliose and bonamiose. The bonamiose is due to a parasite Bonamia ostreae. The study of interactions between the parasite and oysters hemocytes with flow cytometry allowed to identify modifications of hemocytes activities wh en active parasite is present. On the other hand, inactive parasite does not induce modification for the same hemocyte's activities. Finally, a new study approach, subtractive and suppressive hybridization, has been undertaken in order to identify genes expressed by hemocytes and parasites during in vitro...
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Maladie; Bonamia ostrea; Interaction; Cytométrie en flux; SSH; Flat oyster; Ostrea edulis; Disease; Bonamia ostreae; Interaction; Flow cytometrY; Subtractive and suppressive hybridization.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00426/53790/54698.pdf

Rapport final : mise au point de cultures cellulaires de mollusques marins
Provedor de dados: 5
Autores: Grizel, Henri.
Le problème majeur allant à l'encontre du développement de l'aquaculture dans le monde, en particulier pour l'élevage des mollusques, est lié à des maladies infectieuses. Les agents responsables sont essentiellement des parasites et des microorganismes intracellulaires. Les données acquises en pathologie des mollusques sont à l'heure actuelle en majorité descriptives, mais compte tenu de l'impact économique de ces maladies, des recherches doivent être développées pour élaborer des mesures prophylactiques et thérapeutiques. Dans cette optique l'établissement de lignées cellulaires de mollusques marins constitue une priorité car, à l'instar des lignées cellulaires de vertébrés utilisées en pathologie humaine et vétérinaire, elles permettraient la production...
Tipo: Text
Palavras-chave: Pathologie; Culture cellulaire; Biologie moléculaire; Agent pathogène; Primoculture; Ostrea edulis.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00049/15978/13420.pdf

La variabilité génétique chez l'huître plate Ostrea edulis (L. 1758) : inférence du nombre de géniteurs instantané d'une population
Provedor de dados: 5
Autores: Da Silva, Sara Maria Mira.
Les études de génétique des populations des bivalves marins ont fréquemment mit en évidence une relation hétérozygotie / valeur sélective, et un fort déficit en hétérozygotes. Parmi les hypothèses explicatives de ces deux phénomènes, la création d'individus consanguins dans les populations est particulièrement intéressante à tester. Le but de ce travail était de vérifier s'il pouvait y avoir un nombre faible de géniteurs à la base d'un événement de reproduction donné chez l'huître plate Ostrea edulis. Dans cette étude, nous montrons qu'une cohorte de captage collectée sur un intervalle de temps très court (15 jours), présente une diversité génétique fortement réduite ainsi qu'une modification des fréquences alléliques par rapport aux populations d'adultes...
Tipo: Text
Palavras-chave: Génétique population; Huître plate; Ostrea edulis; Diversité génétique; Variabilité génétique.
Ano: 2001

Bilan de l'état zoosanitaire des mollusques en Méditerranée française : 1988-2001
Provedor de dados: 5
Autores: Pichot, Yves.
The fact that molluscs from the Mediterranean have benefited from a privileged zoosanitary condition compared to those of the other French coasts has for a long time limited the control of farms and natural fields in this area. It is only in the early 70's, because of the pathological problems and risks observed in other areas that Mediterranean molluscs started to be stictly under zoosanitory control. This control was however limited until the early 90's. With the implementation of the European directives 91/67 and 95/70 for the protection of molluscs against diseases and their propagation, with the creation in 1992 of REPAMO- IFREMER (with a watch unit in the Mediterranean), the control of molluscs in the Mediterranean has considerably improved. Since...
Tipo: Text
Palavras-chave: Méditerranée; Zoosanitaire; Mortalité; Huître plate; Ostrea edulis; Huître creuse; Crassostrea gigas; Moule; Mytilus galloprovincialis; Palourde; Tapes decussatus; Telline; Donas trunculus; Mediterranean; Zoosanitary; Mortality; Flat oyster; Ostrea edulis; Pacific cupped oyster; Crassostrea gigas; Mussel; Mytilus galloprovincialis; Clam; Tapes decussatus; Coquina clam; Donax trunculus.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00145/25579/23717.pdf

Variété "bicolor" de l'huître plate : Ostrea edulis
Provedor de dados: 5
Autores: Marteil, Louis.
Bien que la culture de l'huître portugaise ne soit pas autorisée dans le Bassin Morbihannais, jusqu'ici réservé à la production et à l'élevage de la seule huître plate, Ostrea edulis, il n'est pas rare de trouver chaque année, parmi les jeunes plates qui garnissent les collecteurs, quelques exemplaires de Gruyphea angulata. Celles- sont toujours peu nombreuses : 1 pour 50000 ou même 10 000 huîtres plates. Si les individus adultes de l'une et l'autre espèces peuvent être facilement distingués par leur seule conformation extérieure, cette différentiation n'est pas toujours aussi aisée sur les très jeunes naissains fixés, en raison de l'existence de jeunes plates présentant, au premier examen, des ressemblances marquées avec de jeunes portugaises.
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Gryphea angulata; Naissain; Comparaison.
Ano: 1953
URL: http://archimer.ifremer.fr/doc/00003/11466/8026.pdf

Impact of the reproduction dynamics on genetic variation in the European flat oyster Ostrea edulis
Provedor de dados: 5
Autores: Lapegue, Sylvie; Taris, Nicolas; Lallias, Delphine; Bonhomme, Francois; Boudry, Pierre.
The European flat oyster (Ostrea edulis L.) is a marine bivalve whose natural geographical distribution ranges along the European Atlantic coast from Norway to Morocco, in addition to the Mediterranean and Black Sea. The latest results obtained on the genetic differentiation between these populations have led us to pursue studies at a finer scale, in order to estimate the effective number of breeders and the temporal dynamics of reproduction and, more specially, recruitment. Several experiments were performed to document (1) the variance in allele frequencies during a natural settlement period; (2) the paternal contribution to fertilization by analyzing larvae sampled at the brooding stage within individual females; (3) the variance of individual...
Tipo: Text
Palavras-chave: Ostrea edulis; Oyster; Sexual reproduction; Population dynamics; Oyster culture; Inbreeding; Heterosis; Genetic isolation; Genetic diversity; Breeding success; Biological fertilization.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/acte-3436.pdf

Bonamia-ostreae induced mortalities in one-year old European flat oysters Ostrea edulis: experimental infection by cohabitation challenge
Provedor de dados: 5
Autores: Lallias, Delphine; Arzul, Isabelle; Heurtebise, Serge; Ferrand, Sylvie; Chollet, Bruno; Robert, Maeva; Beaumont, Andrew; Boudry, Pierre; Morga, Benjamin; Lapegue, Sylvie.
Bonamiosis is a parasitic disease (causative agent: Bonamia ostreae) affecting the European flat oyster Ostrea edulis, responsible for a drastic decline in the aquaculture production of this oyster species. Therefore a selective breeding program for resistance to bonamiosis has been undertaken since 1985 bu Ifremer, leading to the production of several selected oyster families. In the present study, a 6-month cohabitation challenge experiment was performed in order to transmit the disease from wild oysters (injected with the parasite) to two tested families of oysters originating from the selective breeding program. Mortalities were checked daily, and ventricular heart smears were performed on dying or moribund oysters to detect the level of infection to...
Tipo: Text
Palavras-chave: Heart smear; Transmission; Cohabitation experiment; Bonamia ostreae; Ostrea edulis.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/acte-4535.pdf

Etude expérimentale de différentes conditions de mileu sur le comportement du parasite de la glande digestive de l'huître plate (Ostrea edulis L.)
Provedor de dados: 5
Autores: Comps, Michel.
During trials on the influence of environmental factors on the parasite of the flat oyster digestive gland, we observed that some experimental conditions including the re-immersion after a several day-exsiccation period could result in a decrease of the parasitism rate.
Tipo: Text
Palavras-chave: Glande digestive; Huître plate; Ostrea edulis; Bivalve; Pathologie; Parasitologie.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/acte-6168.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

A first generation genetic linkage map of the European flat oyster Ostrea edulis (L.) based on AFLP and microsatellite markers
Provedor de dados: 5
Autores: Lallias, Delphine; Beaumont, A.r.; Haley, C.s.; Boudry, Pierre; Heurtebise, Serge; Lapegue, Sylvie.
This study presents the first genetic linkage map for the European flat oyster Ostrea edulis. AFLP and 20 microsatellite markers were genotyped in a three-generation pedigree comprised of 2 grand-parents, 2 parents and 92 progeny. Chi-square goodness of fit tests revealed high segregation distortion, which was significant for 32.8% of markers. Sixteen microsatellites and 235 AFLPs (170 AFLPs type 1:1 and 65 AFLPs type 3:1) were used to build sex-specific linkage maps using CriMap software. The first parental map (P1) consisted of 104 markers grouped in nine linkage groups, spanning 471.2 cM with an average spacing of 4.86 cM. The second parental map (P2) consisted of 117 markers grouped in ten linkage groups (which equals the haploid chromosome number),...
Tipo: Text
Palavras-chave: Microsatellite; AFLP; Ostrea edulis; Flat oyster; Genetic linkage map.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2642.pdf

Biological characteristics of sperm in European flat oyster (     Ostrea edulis     )
Provedor de dados: 5
Autores: Suquet, Marc; Pouvreau, Stephane; Queau, Isabelle; Boulais, Myrina; Le Grand, Jacqueline; Ratiskol, Dominique; Cosson, Jacky.
n brooding mollusc species that incubate larvae before their release in seawater, the biology of gametes remains poorly explored. The present study describes some biological characteristics of sperm of the European flat oyster, a native species that has been over-exploited in the past and is nowadays classified as an endangered species in Europe. Flat oysters were collected by divers in the Rade de Brest (Finistère, France), during its natural reproduction period. Gonadal pH is acidic (6.31 ± 0.10). Spermatozoa are clustered in spermatozeugmata, an acellular structure in which the sperm heads are embedded. After their transfer in seawater, spermatozeugmata have a mean diameter of 64 ± 3 μm and they release free spermatozoa for a mean duration of...
Tipo: Text
Palavras-chave: Oyster; Ostrea edulis; Brooding species; Sperm; Spermatozeugmata; Endangered species.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00454/56539/58245.pdf

Point sur le programme huître plate - Complément au compte-rendu de réunion REGEMO sur l'Amélioration Génétique de l'huître plate du 11 mars 1998
Provedor de dados: 5
Autores: Goyard, Emmanuel; Lapegue, Sylvie; Gerard, Andre; Boudry, Pierre.
Ce document vient compéter le rapport REGEMO sur l'huître plate. Une première version visait essentiellement à faciliter le transfert de responsabilité du programme en cours. Celle-ci, épurée des aspects pratiques purement internes, se propose de faire le point sur les familles produites en 1998, et la continuité du programme d'amélioration.
Tipo: Text
Palavras-chave: Génétique; Sélection génétique; Huître plate; Ostrea edulis; Génétique population; Croissance.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00049/15980/13422.pdf

Etude cellulaire et moléculaire de l’apoptose chez l’huître plate Ostrea edulis en réponse au parasite Bonamia ostreae
Provedor de dados: 5
Autores: Gervais, Ophelie.
The flat oyster, Ostrea edulis, is the European endemic oyster species. Its production has been reduced because of overfishing and diseases including bonamiosis. Massive mortalities observed on the Pacific cupped oyster these last years explained the wish of shellfish farmers to diversify their production and their revival of interest for this patrimonial oyster species. However, bonamiosis due to the protozoan, Bonamia ostreae, is still a major problem for the production of this species. Measures to control the disease are limited and require a better knowledge of the interactions between the flat oyster and the parasite. Previous studies have suggested the involvement of apoptosis in flat oyster defense mechanisms against B. ostreae. This mechanism is...
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Bonamia ostreae; Apoptose; Flat oyster; Ostrea edulis; Bonamia ostreae; Apoptosis.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00370/48142/48243.pdf

Testage de souches d'huîtres plates Ostrea edulis tolérantes à Bonamia ostreae: élevage contrôlé, écophysiologie et modélisation de la croissance
Provedor de dados: 5
Autores: Haure, Joel.
Since the 1960's, breeding of the flat oyster Ostrea edulis has been under threat from two protozoan parasites, one of which is Bonamia ostrea. Several attempts have been made to introduce flat oysters of the Ostrea genus on the French coast, without much success. The IFREMER genetics laboratory. at Ronce les Bains has used selective pressure with Bonamia ostrea to obtain bonamiosis-resistant strains of the flat oyster, Ostrea edulis. The growth and physiology of these animaIs was studied in an intensive breeding system in which the algae Skeletonema costatum was used as fodder. The growth performance of the tolerant animals was compared with that of non-selected controls over a period of three years (1994,1995,1996). An analysis of the results showed the...
Tipo: Text
Palavras-chave: Ostrea edulis; Skeletonema costatum; Ecophysiologie; Modélisation; Elevage intensif; Bonamia ostreae; Ostrea edulis; Skeletonema costatum; Ecophysiology; Modelisation; Intensive culture; Bonamia ostreae.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00108/21961/19555.pdf

Structuration génétique mitochondriale chez l'huître plate Ostrea edulis L. le long des côtes européennes, et comparaison avec la différentiation nucléaire
Provedor de dados: 5
Autores: Diaz Almela, Elena.
La structuration géographique des populations naturelles d'huître plate (Ostrea edulis) a été étudiée à partir de l'analyse du polymorphisme de conformation simple brin (SSCP), d'un fragment d'environ 300 pb du gène de l'ARNr mitochondrial 12S. les échantillons (13 localités, 507 individus) utilisés avaient fait l'objet d'une étude antérieure de structuration des populations avec 5 locus microsatellites. Il ont été analysés ici dans le but d'une comparaison des structurations observées sur marqueurs mitochondrial et nucléaire. La diversité moyenne intrapopulation du gène de l'ARNr 12S (Hn.b = 0,494) est presque la moitié de celle estimée avec les microsatellites (Hn.b = 0,904) bien que la variance entre populations soit beaucoup plus forte pour l'ADN...
Tipo: Text
Palavras-chave: Génétique population; Huître plate; Ostrea edulis; Microsatellite; ARNr mitochondrial 12S; Diversité génétique.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00033/14381/11671.pdf

Validation in commercial conditions of the response to selection of the European flat oyster Ostrea edulis for resistance to Bonamia ostreae
Provedor de dados: 5
Autores: Bedier, Edouard; Langlade, Aime; Angeri, Stéphane; Brizard, Raphael; Nerlovic, V.; Glize, Philippe; Haffray, Philippe.
Since the outbreaks of the parasitosis with Marteilia refringens and Bonamia ostreae in the last 60's, the French production of the European flat oyster dropped from 20000 mT to less than 1500 mT currently, leaving the French shellfish farming in situation of virtually monoculture of the Pacific cupped oyster Crassostrea gigas. To sustain this traditional culture, Ifremer has developed, at the experimental level, a genetic selection for a better tolerance to Bonamia ostreae which led to an improvement of survivals. The transfer of these results to the business scale requires the control of the reproduction in hatchery and the adaptation of the cycle of production to the constraints of seedlings in deep water as practised in Brittany (France). That's why a...
Tipo: Text
Palavras-chave: Selection; Genetic; Bonamia ostreae; Parasite; Ostrea edulis; Oyster.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3313.pdf

Characterization of 27 microsatellite loci in the European flat oyster Ostrea edulis
Provedor de dados: 5
Autores: Lallias, Delphine; Stockdale, Ruth; Boudry, Pierre; Beaumont, Andy R.; Lapegue, Sylvie.
The flat oyster Ostrea edulis is native to Europe and populations have been severely depleted by the parasite Bonamia ostreae since the 1980s. Additional genetic markers are required to improve population genetics study and linkage map development for selection for B. ostrea-resistance in this species. Here, we characterized 27 novel microsatellite loci for O. edulis. Number of alleles per locus ranged from 6 to 25 and observed heterozygosity between 0.375 and 1. Null alleles were suggested at a few loci but most loci were in Hardy-Weinberg agreement enabling their reliable use in further population and mapping genetics approaches.
Tipo: Text
Palavras-chave: Universal tailed primer labelling; Oysters; Ostrea edulis; Microsatellites.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00341/45195/44592.pdf

Que savons-nous des Marteillia?
Provedor de dados: 5
Autores: Berthe, Franck; Haffner, Philippe; Zerabib, Maamar; Rodriguez, David.
Marteilia refringens, a parasitic protist, is partially responsible for the drastic reduction in French production of the European flat oyster (Ostrea edulis) in the 1970s and still constitutes a major obstacle for revitalizing coastal farming of this species.
Tipo: Text
Palavras-chave: Bivalves; Ostrea edulis; Protiste; Parasite; Marteilia refringens; Pathologie.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-3247.pdf

History, Status, and Future of Oyster Culture in France
Provedor de dados: 5
Autores: Buestel, Dominique; Ropert, Michel; Prou, Jean; Goulletquer, Philippe.
The history of French oyster culture consists of a succession of developmental phases using different species, followed by collapses caused by diseases. The indigenous species Ostrea edulis was replaced first with Crassostrea angulata, then C. gigas. France is now the top producer and consumer of oysters in Europe, producing around 120,000 t of the cupped oyster C. gigas annually, and an additional 1500 t of the flat oyster O. edulis. Cupped oysters are produced all along the French coast from natural and hatchery spat. Various structures are used to collect spat from the wild. After a growing-on period, oysters are Cultivated by three main methods: (1) on-bottom culture in the intertidal zone or in deep water, (2) off-bottom culture in plastic mesh bags...
Tipo: Text
Palavras-chave: Cupped oyster; Flat oyster; Ostrea edulis; Crassostrea gigas; French production; Aquaculture.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7396.pdf

Taxinomie et épidémiologie moléculaires du parasite Marteilia refringens Grizel et al. 1974 : intérêt pour la gestion du risque sanitaire en conchyliculture
Provedor de dados: 5
Autores: Berthe, Franck.
Infectious diseases are currently recognised as a major limiting factor to development and sustainability of aquaculture of molluscs. The study is focused on the European flat oyster, Ostrea edulis and its paramyxean parasite Marteilia refringens. Results are contributing to the prevention of risk associated to infected stocks imports from endemic zones, by developing molecular diagnostic tools that are specific, sensible and reliable. Phylogeny and taxonomy of Marteilia refringens, previously impeded by microscopy limits, were clarified by sequencing the rDNA SSU, small sub-unit in the rRNA gene cluster. These new insights have practical implications discussed in a pragmatic polyphasic approach involving pathology and epidemiology. This approach led us to...
Tipo: Text
Palavras-chave: Marteilia refringens; Marteilia maurini; Ostrea edulis; Mytilus edulis; Pathologie; Phylogénie moléculaire; Taxinomie; Epidémiologie; Marteilia refringens; Marteilia maurini; Ostrea edulis; Mytilus edulis; Molluscs diseases; Molecular phylogeny; Taxonomy; Epidemiology.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00109/21980/19594.pdf

Recherche sur l'agent de la maladie de la glande digestive de Ostrea edulis Linné
Provedor de dados: 5
Autores: Grizel, Henri; Comps, Michel; Bonami, Jean-robert; Cousserans, F.; Duthoit, Jean-louis; Le Pennec, Marie-annick.
Numerous diseases have been described in Ostrea and Crassostrea oysters and especially in cultivated species of commercial interest. The lack of growth, but more often mortalities, are in most cases the most obvious symptoms of this supposed sickness. The consequences of these epizooties can be so bad that they can result in the disappearance of an entire oyster population from a determined area as for Ostrea edulis L. in 1920-1921 (Dollfus, 1922) on some coasts of Europe and for Crassostrea angulata LMK in 1970-1971 on the French Atlantic coast and especially in the Marennes-Oléron and Arcachon basins. These cases can be considered as extreme cases as most of the time, oysters are only subjected to a number of episodic affections, affecting the farms only...
Tipo: Text
Palavras-chave: Glande digestive; Maladie; Pathologie; Ostrea edulis; Huître.
Ano: 1974
URL: http://archimer.ifremer.fr/doc/1974/publication-6286.PDF

Identification of genes from flat oyster Ostrea edulis as suitable housekeeping genes for quantitative real time PCR
Provedor de dados: 5
Autores: Morga, Benjamin; Arzul, Isabelle; Faury, Nicole; Renault, Tristan.
Bonamia ostreae is an intrahaemocytic protozoan affecting Ostrea edulis. The parasite multiplies within haemocytes without being degraded and involves changes in cellular activities. Studies aiming at better understanding host response to a pathogen at the transcriptome levels are frequently based on the use of real time PCR assays, which require some reference genes. However, very few sequence data is available for O. edulis in public databases.  Subtracted cDNA libraries were constructed from the O. edulis haemocytes in order to identify genes involved in host reactions against the parasite and quantitative real time PCR assays were developed to study expression of these genes. In this context, identification of reference genes and study of their...
Tipo: Text
Palavras-chave: Real time PCR; Housekeeping genes; Haemocytes; Ostrea edulis; Bonamia ostreae.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00018/12880/9829.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

Development of SNP genotyping arrays in two shellfish species
Provedor de dados: 5
Autores: Lapegue, Sylvie; Harrang, Estelle; Heurtebise, Serge; Flahauw, Emilie; Donnadieu, C.; Gayral, P.; Ballenghien, M.; Genestout, L.; Barbotte, L.; Mahla, R.; Haffray, P.; Klopp, C.
Use of SNPs has been favored due to their abundance in plant and animal genomes, accompanied by the falling cost and rising throughput capacity for detection and genotyping. Here, we present in vitro (obtained from targeted sequencing) and in silico discovery of SNPs, and the design of medium-throughput genotyping arrays for two oyster species, the Pacific oyster, Crassostrea gigas, and European flat oyster, Ostrea edulis. Two sets of 384 SNP markers were designed for two Illumina GoldenGate arrays and genotyped on more than 1000 samples for each species. In each case, oyster samples were obtained from wild and selected populations and from three-generation families segregating for traits of interest in aquaculture. The rate of successfully genotyped...
Tipo: Text
Palavras-chave: Crassostrea gigas; GoldenGate technology; Ostrea edulis; Oysters; SNP genotyping.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00172/28369/26677.pdf

La maladie de la glande digestive d'Ostrea edulis Linne
Provedor de dados: 5
Autores: Grizel, Henri; Tige, Gilbert.
The first microscope observations of the digestive gland of Ostrea edulis were conducted by Comps (1970) and Herbach (1971), but the first effects had already been observed in the autumn of 1967. During summer 1968, an abnormal mortality occurred in the upstream part of the Aber Wrach, then spread downstream and into the Aber Benoît. Similar mortalities were also observed in the area of La Tremblade and in the Arcachon Bay. Since then, a permanent monitoring is conducted in the different Breton oyster culture centres and the Arcachon area.
Tipo: Text
Palavras-chave: Glande digestive; Maladie; Ostrea edulis; Huître; Pathologie.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/acte-5929.PDF

Caractérisation morphologique et fonctionnelle des hémocytes d'Ostrea edulis et de Crassostrea gigas, mollusques bivalves. Etude in vitro de leurs interactions avec le protozoaire Bonamia ostreae (Ascetospora)
Provedor de dados: 5
Autores: Jean Chagot, Dominique.
La morphologie et l'équipement enzymatique des hémocytes de deux espèces d'huîtres, Ostea edulis et Crassostrea gigas ont été étudiés. L'analyse des fonctions des hémocytes dans les mécanismes immunitaires a permis de mettre en évidence leur rôle de macrophage, mais n'a pas fait apparaître de différence interspécifique dans les phénomènes des cytocidie oxygène dépendants, susceptible d'expliquer la permissivité d'Ostrea edulis pour Bonamia ostreae et la résistance de Crassostrea gigas. L'infection in vitro de primocultures d'hémocytes des deux espèces démontre un mécanisme d'entrée par phagocytose, doublé chez Ostrea edulis d'une possible pénétration active. L'analyse des récepteurs impliqués dans la phagocytose (récepteurs pour des opsonines plasmatiques,...
Tipo: Text
Palavras-chave: Ostrea edulis; Crassostrea gigas; Bonamia ostreae; Hémocyte; Morphologie; Macrophage; Caractérisation enzymatiques; Chimioluminescence; Interaction in vitro; Phagocytose; Récepteur.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00210/32102/30559.pdf

First isolation of Nocardia crassostreae from pacific oyster Crassostrea gigas in Europe
Provedor de dados: 5
Autores: Engelsma, M; Roozenburg, I; Joly, Jean-pierre.
In summer 2006 an extensive mortality of Pacific oysters Crassostrea gigas occurred in Lake Grevelingen, the Netherlands. A sample of Pacific oysters was investigated for the presence of shellfish pathogens as potential causes of the mortality. Yellow-green lesions were observed in several oysters upon clinical inspection. Histopathology showed that 6 out of 36 oysters had a suspected bacterial infection, including 4 Nocardia-like infections. Two bacterial species, Vibrio aestuarianus and Nocardia crassostreae, were isolated from haemolymph samples and identified using PCR and sequencing of the 16S rRNA gene. This is the first isolation of N. crassostreae from shellfish in European waters. The near full-length 16S rRNA sequence of this Dutch Nocardia sp....
Tipo: Text
Palavras-chave: Summer mortalities; Ostrea edulis; Crassostrea gigas; Vibrio aestuarianus; Nocardia crassostreae.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4568.pdf

Combining Two-Stage Testing and Interval Mapping Strategies to Detect QTL for Resistance to Bonamiosis in the European Flat Oyster Ostrea edulis
Provedor de dados: 5
Autores: Lallias, Delphine; Gomez-raya, L.; Haley, C. S.; Arzul, Isabelle; Heurtebise, Serge; Beaumont, A. R.; Boudry, Pierre; Lapegue, Sylvie.
We have identified quantitative trait loci (QTL) in the flat oyster (Ostrea edulis) for resistance to Bonamia ostreae, a parasite responsible for the dramatic reduction in the aquaculture of this species. An F-2 family from a cross between a wild oyster and an individual from a family selected for resistance to bonamiosis was cultured with wild oysters injected with the parasite, leading to 20% cumulative mortality. Selective genotyping of 92 out of a total of 550 F-2 progeny (i.e., 46 heavily infected oysters that died and 46 parasite-free oysters that survived) was performed using 20 microsatellites and 34 amplification fragment length polymorphism primer pairs. Both a two-stage testing strategy and QTL interval mapping methods were used. The two-stage...
Tipo: Text
Palavras-chave: Statistical power; Survival analysis; QTL mapping; Disease resistance; Ostrea edulis.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6682.pdf

Modèle d'étude in vitro de Bonamia ostreae (Ascetospora), parasite intrahémocytaire d'Ostrea edulis. Etude d'intéractions cellulaires hôte-parasite
Provedor de dados: 5
Autores: Mourton, Chantal.
Oyster culture is, at a world scale, hit by variious epizooties, which are maintly caused by protozoans of the Phylum Ascetospora. Among them, Bonamia ostreae consitutes an appreciated model in order to study, at the cell scale, host-parasite relationships, as well as the immune role of hemocytes. Indeed, this parasite, which reproduces in hemocytes of Ostrea edulis, but cannot develop in Crassostea gigas. This development of an in vitro model for hemocyte-Bonamia relationships is presented. This includes the development and implementation of various techniques : making primocultures, protocol for infection with purified parasites, histological and immunoenzymatic analyses of infection. Such model allowed to study the interaction between host and...
Tipo: Text
Palavras-chave: Modèle; Histologie; Méthodologie; Primoculture; Ostrea edulis; Parasite; Hémocytes; Bonamia ostreae; Ascetospora; Protozoaire; Epizootie.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/rapport-3234.pdf

Mise en évidence d'Haplosporidium sp. (Haplosporida - Haplosporidiidae) parasite de l'huître plate Ostrea edulis L.
Provedor de dados: 5
Autores: Bachere, Evelyne; Grizel, Henri.
A new Haplosporidie has been observed in the flat oyster Ostrea edulis from the Mediterranean Sea. Different development stages have been described in light and electron microscopy. The characteristics of the spores and especially the presence of at least four sporal filaments enable us to distinguish this Haplosporidie from those already described in the Atlantic flat oysters. Different haplosporidies have been described in the oyster. Some are known as being pathogenic, Minchinia costalis (Andrews et al., 1962 and 1978; Couch 1967) and Minchinia nelsoni (Haskin et al., 1966; Farley 1968 and 1975), others, identified only recently, are considered as occasional parasites (Van Banning, 1977). During the research conducted on Bonamia ostreae (Pichot et al.,...
Tipo: Text
Palavras-chave: Pathologie; Haplosporidium; Parasite; Ostrea edulis; Huître plate.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-6576.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

Apport d'un programme de génétique à une filière de production aquacole : l'exemple de l'ostréiculture
Provedor de dados: 5
Autores: Lapegue, Sylvie; Bedier, Edouard; Goyard, Emmanuel; Degremont, Lionel; Baud, Jean-pierre; Gerard, Andre; Goulletquer, Philippe; Boudry, Pierre.
Two oyster species are currently present along the French coasts : the indigenous European flat oyster (Ostrea edulis), and the Pacific cupped oyster (Crassostrea gigas), that has been introduced from Japan since the beginning of the 70ies. The flat oyster successively suffered from two protozoan diseases during the 60ies and its production decreased from 20 000 tons/year by that time to 1 500 tons/year nowadays. Consequently, the oyster production is principally (99%) based upon the Pacific oyster species with approximately 150 000 tons/year among which 90% are grown from the natural spat. However, the hatchery production of this species is developing and was estimated to 400 to 800 millions spat in 2002. Moreover, strengthened relationships between...
Tipo: Text
Palavras-chave: Growth; Selection; Genetic breeding; Genetic; Ostrea edulis; Crassostrea gigas; Oysters; Croissance; Sélection; Amélioration génétique; Génétique; Ostrea edulis; Crassostrea gigas; Huîtres.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2003/acte-3491.pdf

Induction of apoptosis by UV in the flat oyster, Ostrea edulis
Provedor de dados: 5
Autores: Gervais, Ophelie; Renault, Tristan; Arzul, Isabelle.
Apoptosis is a fundamental feature in the development of many organisms and tissue systems. It is also a mechanism of host defense against environmental stress factors or pathogens by contributing to the elimination of infected cells. Hemocytes play a key role in defense mechanisms in invertebrates and previous studies have shown that physical or chemical stress can increase apoptosis in hemocytes in mollusks. However this phenomenon has rarely been investigated in bivalves especially in the flat oyster Ostrea edulis. The apoptotic response of hemocytes from flat oysters, O. edulis, was investigated after exposure to UV and dexamethasone, two agents known to induce apoptosis in vertebrates. Flow cytometry and microscopy were combined to demonstrate that...
Tipo: Text
Palavras-chave: Apoptosis; Hemocyte(s); Oyster; Ostrea edulis; UV; Flow cytometry; Microscopy.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00270/38160/36295.pdf

Recherches sur Bonamia ostreae gen. n., sp. n., parasite nouveau de l'huitre plate Ostrea edulis L
Provedor de dados: 5
Autores: Pichot, Yves; Comps, Michel; Tige, Gilbert; Grizel, Henri; Rabouin, Marie-agnès.
Unaccustomed mortalities were observed during spring 1979 in flat oysters of Ile-Tudy. A parasite was observed in the blood cells of the oysters causing gill ulcers.
Tipo: Text
Palavras-chave: France; ANE; Bonamia ostreae; Ostrea edulis; New species; Parasitic diseases; Oyster culture.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-1833.pdf

Is pallial mucus involved in Ostrea edulis defenses against the parasite Bonamia ostreae?
Provedor de dados: 5
Autores: Fernández-boo, Sergio; Gervais, Ophelie; Prado-alvarez, Maria; Chollet, Bruno; Claverol, Stéphane; Lecadet, Cyrielle; Dubreuil, Christine; Arzul, Isabelle.
Bonamia ostreae is an intrahemocytic parasite that has been responsible for severe mortalities in the flat oyster Ostrea edulis since the 1970́s. The Pacific oyster Crassostrea gigas is considered to be resistant to the disease and appears to have mechanisms to avoid infection. Most studies carried out on the invertebrate immune system focus on the role of hemolymph, although mucus, which covers the body surface of molluscs, could also act as a barrier against pathogens. In this study, the in vitro effect of mucus from the oyster species Ostrea edulis and C. gigas on B. ostreae was investigated using flow cytometry. Results showed an increase in esterase activities and mortality rate of parasites exposed to mucus from both oyster species. In order to...
Tipo: Text
Palavras-chave: Bonamia ostreae; Crassostrea gigas; Ostrea edulis; Flow cytometry; Immune response; Proteome.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00594/70602/68795.pdf

QTL mapping for resistance to bonamiosis in the European flat oyster Ostrea edulis
Provedor de dados: 5
Autores: Lallias, Delphine; Beaumont, Andy; Haley, Chris; Heurtebise, Serge; Boudry, Pierre; Lapegue, Sylvie.
A breeding programme has been undertaken by Ifremer to produce selected Ostrea edulis families which are resistant to Bonamia ostreae, a parasite which is the most significant constraint on aquaculture of this oyster. Using such families, we aimed to identify Quantitative Trait Loci (QTLs) of resistance/susceptibility to bonamiosis. We used an F2 family derived from a bi-parental cross between a wild oyster and an individual from one of the selected oyster families. A total of 550 F2 individuals from the family cohabited with wild oysters that were injected with the parasite. Mortality was checked daily over six months and heart smears were used on moribund or dying oysters to detect the presence and level of infection of the parasite. Ninety two F2...
Tipo: Text
Palavras-chave: QTLs; Flat oyster; Ostrea edulis; Bonamia ostreae; Genetic; QTL.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/acte-3726.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

Obtention de souches conchylicoles performantes par polyploïdisation (4ème partie)
Provedor de dados: 5
Autores: Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Bodoy, Alain; Heurtebise, Serge; Garnier, Jacqueline; Baud, Jean-pierre; Nourry, Max; Haure, Joel; Martin, Anne-genevieve; Claude, Serge; Barret, Jean; Devauchelle, Nicole; Joly, Jean-pierre; Goulletquer, Philippe; Coatanea, Denis; Oheix, Jocelyne; Zanette, Yvan; Blachier, Philippe.
This fourth part of the polyploidisation program reports the experiments that were conducted in 1992 and that were devoted to : - the acquiring of a new method using an epifluroescent microscope - the development o a new technique for inducing polyploidy - the triploidy induction for the Europena clam Ruditapes decussatus - the settlement of performance controls conducted on diploid and triploid populations of Ostrea edulis - results of performance controls conducted on diploid and triploid populations of Crassostrea gigas and Ruditapes philippinarum
Tipo: Text
Palavras-chave: Ruditapes decussatus; Ruditapes philippinarum; Ostrea edulis; Crassostra gigas; Cytongenetics; Polyploidy; Ruditapes decussatus; Ruditapes philippinarum; Ostrea edulis; Crassostrea gigas; Cytogénétique; Polyploïdie.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/rapport-3859.PDF

Apport des informations moléculaires et cellulaires pour la caractérisation de la résistance de l'huître plate européenne vis-à-vis de la bonamiose, et pour la détection de signatures de la sélection naturelle
Provedor de dados: 5
Autores: Harrang, Estelle.
The European flat oyster, an endemic species from European coasts, has been classified in the category of "endangered and/or declining species" since 2003. Indeed, the natural beds of this oyster, consumed since ancient times, have gradually been decimated by over-exploitation and by successive emergence of parasitic diseases. The parasite that causes the disease called bonamiosis has contributed to drastically reduce the French and European aquacultural production of flat oyster. Marine bivalve molluscs display two specificities that restrict possibilities to fight against diseases: they are grown in an open environment, and possess an innate immune system lacking in adaptive response. In this context, the selection of animaIs naturally resistant to...
Tipo: Text
Palavras-chave: Huître plate Européenne; Ostre edulis; Bonamiose; Bonamia ostreae; Marqueurs SNP; Expression génique; Activité hémocytaire; Cartographie de liaison; QTL; EQTL; Populations naturelles; Diversité génétique; Sélection naturelle; European flat oyster; Ostrea edulis; Bonamiosis; Bonamia ostreae; SNP markers; Gene expression; Haemocytic activity; Linkage map; QTL; EQTL; Natural populations; Genetic diversity; Genetic structure; Natural selection.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00127/23785/21702.pdf

Relance de l'huître plate. Rapport de synthèse des travaux 1990
Provedor de dados: 5
Autores: Martin, Anne-genevieve.
Une convention a été signée en 1990 avec la Région Bretagne pour financer la poursuite des recherches dans le but d'accélérer la relance de l'élevage de l'huître plate, à la suite de la deuxième épizootie due à un protozoaire, Bonamia ostreae. Ce rapport présente les travaux réalisés et les résultats acquis durant l'année 1990, dans les domaines de l'épidémiologie descriptive, de la zootechnie, de la génétique (recherche d'espèces ou de souches résistantes) et de l'immuno-pathologie (étude de la maladie et des mécanismes de défense des mollusques).  Durant l'année 1990, la situation épidémiologique des élevages d'huîtres plates en eau profonde a évolué différemment selon les secteurs: relativement stable en Baie du Mont st Michel, elle présente de brusques...
Tipo: Text
Palavras-chave: Bivalves; Ostrea edulis; Bonamia ostreae; Épidémiologie; Pathologie; Immunologie; Génétique; Échantillonnage; Élevage; Shellfish; Ostrea edulis; Bonamia ostreae; Epidemiology; Pathology; Immunology; Genetic; Sampling; Rearing.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00102/21320/18942.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

Evolution of oyster aquaculture : problems and perspectives
Provedor de dados: 5
Autores: Heral, Maurice.
The total marine molluscs produced by aquaculture had increased from 1984 to 1990 by 1 000 000 tons going from 1 993 985 tons to 2 964 688 tons. The oyster production remained constant with 870 000 tons. Crassostrea gigas, the Japanese oyster, represented more than 80 % of the oyster production but high mortalities appeared in different countries connected to end of winter and summer mortalities and development of new diseases. The cultivation of Crassostrea virginica, the American oyster, was limited (80 000 tons) by the spreading of two diseases (MSX and dermo) destruction of habitat and over-exploitation. Production of the fiat oyster Ostrea eduIis was still very limited by the presence of the Bonamia diseases in a11 the countries except on...
Tipo: Text
Palavras-chave: Ostrea edulis; Crassostrea virginica; Crassostrea gigas; Huîtres; Culture; Production; Ostréiculture.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/acte-3067.pdf

Strategies for the retention of high genetic variability in European flat oyster (Ostrea edulis) restoration programmes
Provedor de dados: 5
Autores: Lallias, Delphine; Boudry, Pierre; Lapegue, Sylvie; King, Jon W.; Beaumont, Andy R.
The native European flat oyster Ostrea edulis is listed in the OSPAR Convention for the Protection of the Marine Environment of the North-East Atlantic (species and habitat protection) and in the UK Biodiversity Action Plan. Once extremely abundant in the 19th century, European stocks of O. edulis have declined during the 20th century to rare, small, localised populations due to overexploitation, habitat degradation and, most recently, the parasitic disease bonamiosis. Selective breeding programmes for resistance to bonamiosis have been initiated in France and Ireland. High genetic diversity and bonamiosis-resistance would be important features of any sustainable restoration programmes for O. edulis. Oysters were sampled across Europe from four hatchery...
Tipo: Text
Palavras-chave: Restoration programme; Ostrea edulis; Genetic variation; Pedigree reconstruction.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00001/11259/11375.pdf

The selection of an ideal diet for Ostrea edulis (L.) broodstock conditioning (part B)
Provedor de dados: 5
Autores: Gonzalez-araya, Ricardo; Lebrun, Luc; Quere, Claudie; Robert, Rene.
Four microalgae species (Rhodomonas salina, Thalassiosira weissflogii, Thalassiosira pseudonana and Pavlova lutheri) were evaluated to estimate their potential as food for Ostrea edulis (L.) reproductive conditioning. Best ingestion and absorption were observed with R. salina (3.44 and 1.59 mg g− 1 h− 1, respectively), followed by T. pseudonana (2.75 and 0.98 mg g− 1 h− 1) and P. lutheri (2.40 and 0.91 mg g− 1 h− 1). Oysters fed T. weissflogii exhibited the lowest ingestion and absorption values (1.40 and 0.68 mg g− 1 h− 1). Proximate composition (proteins and carbohydrates) and lipid content (fatty acids and sterols) analysed in four main tissues (gonad, digestive gland, muscle and gills) also differed significantly with diet. Protein ranged from 355 mg...
Tipo: Text
Palavras-chave: Ostrea edulis; Conditioning; Algal diets; Ingestion; Absorption; Biochemical composition.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00090/20092/17731.pdf

Development of culture techniques for new bivalve species
Provedor de dados: 5
Autores: Bodoy, Alain; Mercer, J. P.
Were are two main reasons for the development of cultivation techniques of new  bivalve species. First, the risk exists that traditionally reared species may be ereadicated or severely depleted by pathogenic agents. For example the Portuguese 0yster  Crassostrea angulata. disapeared from the French coasts in the early 1970's and worldwide production of the flat oyster, Oslrea edulis has been dramatically reduced by the effects of Bonamia.  Secondly, in some countries production may he self-Iimiting by the size and availabilily of national and international markets and a wider species range could offer some promising new economic opportunities for aquaculturists. In particular this applies to species where there are identifiable market shortfalls.
Tipo: Text
Palavras-chave: Haliotis tuberculata; Ostrea edulis; Placopecten magellanicus; Scallops; Ruditapes philippinarum; Manila clam; Molluscs; Cultivation techniques.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/publication-3033.pdf

Establishing causal link between an infectious agent and mortalities in marine molluscan aquaculture on the example of Bonamia ostreae and Herpèsvirosis in oysters : proposal of a causal grid analysis
Provedor de dados: 5
Autores: Thebault, Anne; Cochennec, Nathalie; Arzul, Isabelle; Renault, Tristan.
In marine molluscan aqauculture, infectious agents are regularly cited in literature associated with mass mortalities as emergin diseases, but the causal link is often based on very few argumeents. 24 ways to demonstrate causal links from epidemiolgical, ecological and marine pathology literature feasible for marine molluscs are given. Those criteria were applied to the ewample of Bonamia ostreae for Ostrea edulis and Herpesvirus for spats and larvae of Crassostrea gigas. Three principles could be applied in marine field for choosing criteria wich should be taken in priority : the demonstration must be given at three levels of organization, organ individual, population, the demonstration must keeps maximum epidemiological criterias, and then mixes...
Tipo: Text
Palavras-chave: Herpesvirus; Bonamia ostrea; Crassostrea gigas; Ostrea edulis; Marine pathology; Ecology; Epidemiology; Infectious agents; Molluscan aquaculture.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/acte-3341.pdf

Localisation and characterization of acid phosphate activity in Bonamia ostreae (Ascetospora), an intrahemocytic protozoan parasite of the flat oyster Ostrea edulis (Bivalvia)
Provedor de dados: 5
Autores: Hervio, Dominique; Chagot, Dominique; Godin, Pierre; Grizel, Henri; Mialhe, Eric.
Acid phosphatase activity was cytochemically detected at the ultrastructural level in the protozoan Bonamia ostreae, an intrahemocytic parasite of the flat oyster Ostrea edulis. Lead nitrate was used as capture agent for phosphate liberated during the hydrolysis of the subtrate (cytidine 5' monophosphate). Lead phosphate precipiation, indicative of enzyme activity, was located in membrane-bound organelles corresponding to the cytoplasmic inclusions known as "dense bodies". Acid phosphatase activity level and sodium L-tartrate inhibition were measured spectrophotometrically from a purified parasite suspension. The possible involvement of this enzyme in intracellular survival of B. ostrea is discussed.
Tipo: Text
Palavras-chave: Acid phosphate activity; Ostrea edulis; Bonamia ostreae.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/publication-2755.pdf

Infection rickettsienne de l'huître plate
Provedor de dados: 5
Autores: Comps, Michel.
Tipo: Text
Palavras-chave: Ostrea edulis; Maladie; Etiologie; Prophylaxie et traitement; Histopathologie; Ostrea edulis; Disease; Etiology; Control; Histopathology.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00140/25077/23183.pdf

Genetic impact of the reproduction dynamics in the European flat oyster Ostrea edulis
Provedor de dados: 5
Autores: Lapegue, Sylvie; Taris, Nicolas; Lallias, Delphine; Bonhomme, Francois; Boudry, Pierre.
The European flat oyster (Ostrea edulis L.) is a marine bivalve whose natural geographical distribution ranges along the European Atlantic coast from Norway to Morocco, in addition to the Mediterranean and Black Sea. The latest results obtained on the genetic differentiation between these populations have led us to persue studies at a finer scale, in order to estimate the effective number of breeders and the temporal dynamics of reproduction and, more specially, recruitment. Several experiments were performed to document (1) the variance in allele frequencies during a natural settlement period, (2) the paternal contribution to fertilization by analyzing larvae sampled at the brooding stage within individual females, (3) the variance of individual...
Tipo: Text
Palavras-chave: Recruitment; Microsatellite markers; Ostrea edulis; European flat oyster; Genetic.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/acte-3485.pdf

New insights in flat oyster Ostrea edulis resistance against the parasite Bonamia ostreae
Provedor de dados: 5
Autores: Morga, Benjamin; Renault, Tristan; Faury, Nicole; Arzul, Isabelle.
Bonamiosis due to the parasite Bonamia ostreae has been associated with massive mortality in flat oyster stocks in Europe. Control of the disease currently relies on disease management practices and transfer restriction. Previously, massal selections based on survival to challenge to infection with B. ostreae have been applied to produce flat oyster families with resistant progeny. In an attempt to understand the molecular mechanisms involved in disease resistance, differentially expressed sequence tags between resistant and wild Ostrea edulis haemocytes, both infected with the parasite, were identified using suppression subtractive hybridisation. Expression of seven ESTs has been studied using quantitative reverse-transcriptase PCR. The base-line...
Tipo: Text
Palavras-chave: Protozoan; Ostrea edulis; Flat oyster; Transcriptomic; Gene expression.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00071/18218/15790.pdf

Haplosporidie parasite des branchies de l'huître palte Ostrea edulis L.
Provedor de dados: 5
Autores: Comps, Michel.
A yellowish mark of around 4 mm in diameter has been observed on the gill of a flat oyster from a batch in finishing process in a fattening pond (La Tremblade). With a magnifying glass, it has been described as a superficial necrosis of the gill. On the histological sections, we noticed that the gill structure was heavily disturbed: in the mark, several filament plicae had agglomerated in a compact mass joining the two gill sheets.
Tipo: Text
Palavras-chave: Haplosporidie; Pathologie; Histologie; Huître plate; Ostrea edulis.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/acte-5918.PDF

Reduced female gene flow in the European flat oyster Ostrea edulis
Provedor de dados: 5
Autores: Diaz Almela, F; Boudry, Pierre; Launey, Sophie; Bonhomme, Francois; Lapegue, Sylvie.
The geographical structure of 15 natural populations of the flat oyster (Ostrea edulis L.) was assessed by single-strand conformation polymorphism (SSCP) of a 313-base-pair (bp) fragment of the mitochondrial 12S-rRNA gene. Fourteen haplotypes were observed, with one being dominant in the Mediterranean samples and another one in the Atlantic populations. The geographically extreme populations sampled in Norway and the Black Sea appeared differentiated by exhibiting the dominance of a third group of haplotypes. The results were compared to available microsatellite data at five loci. The Atlantic/Mediterranean differentiation pattern was qualitatively the same with both types of markers, confirming an isolation-by-distance pattern. The average mitochondrial...
Tipo: Text
Palavras-chave: Ostrea edulis; Polymorphism; Flat oyster; Population; Gene.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-680.pdf

Etude des intéractions entre le parasite Bonamia ostreae et son hôte, huître plate Ostrea edulis in vitro (Diaporama)
Provedor de dados: 5
Autores: Morga, Benjamin; Arzul, Isabelle; Chollet, Bruno; Gagnaire, Beatrice; Renault, Tristan.
Bonamiosis is a disease affecting the flat oyster Ostrea edulis and caused by the protozoa parasite Bonamia ostreae, which is affiliated to the haplosporidia order and the cercozoa phylum. This parasite is mainly intracellular, infecting haemocytes, circulating cells playing an important role in the oyster's defence mechanisms. Even though the parasite's cycle has not been completely understood yet, direct infection from infected oysters to healthy oysters is possible. This leads us to think that there is no intermediary host in the cycle. Very little data on the parasite's infection mechanisms or the host's defence mechanisms is available. In order to better comprehend the Bonamia ostreae / host interaction, some flat oyster's haemocytes have been put in...
Tipo: Text
Palavras-chave: Intéraction; Hémocytes; Ostrea edulis; Bonamia ostreae; Parasitologie.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3366.pdf

Etude des relations allométriques de l'huître plate (Ostrea edulis) relatives à la filtration et à la sonsommation d'oxygène en fonction de la température
Provedor de dados: 5
Autores: Haure, Joel; Baud, Jean-pierre; Bougrier, Serge.
Introducing new species for shellfish farming is essential for expanding farmers' markets and for minimising the pathological risks that endangers professional marine aquaculture activities, which traditionally rely on only one species. Ifremer's Aquaculture and Pathological Genetics (GAP) laboratory participates in the mollusc genetics network (REGEMO). Since 1989, this network has been carrying out a selection programme for resistance or tolerance to Bonamia ostreae in European flat oysters (Ostrea edulis) to revitalize cultivation of this species on a national level.
Tipo: Text
Palavras-chave: Température; Oxygène; Filtration; Ostrea edulis; Allométrie.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-3254.pdf

Observations sur les causes d'une mortalité anormale des huîtres plates (Ostrea edulis L.) dans le Bassin de Marennes
Provedor de dados: 5
Autores: Comps, Michel.
Il a été observé au cours de l'automne 1969 que des huîtres plates (Ostrea edulis L.) élevées et affinées dans des claires du bassin de Marennes périssaient d'une façon anormale. Il s'agissait d'huîtres importées de Bretagne en avril 1969 : âgées de 2 ans, elles avaient séjourné en parc, un an à Arcachon et 4 mois à Paimpol pour être ensuite immergées, à raison de 5/m2, dans des claires de la région de La Tremblade. Par ailleurs des pertes asses sensibles ont été constatées sur des lots d'huîtres provenant d'Arcachon, élevées également en claires à La Tremblade.
Tipo: Text
Palavras-chave: Ostréiculture; Huître plate; Ostrea edulis; Mortalité; Pathologie; Bassin Marennes Oléron; Charente Maritime.
Ano: 1970
URL: http://archimer.ifremer.fr/doc/00009/12005/8697.pdf

Etude de la croissance du naissain d'huitres (Crassostrea gigas, Ostrea edulis) de la métamorphose à la taille de 1 mm. en fonction de différentes nourritures phytoplanctoniques.
Provedor de dados: 5
Autores: Le Borgne, Y; Diss-mengus, B; Marin, J.
Introduction: Among the problems found in mollusc hatcheries, the feeding of growing post larvae is of primary concern. It is therefore essential to reach algal production rationalisation through precise knowledge of the nutritional requirements of the different species of spat produced, and this for a diversity of size classes. Many authors, such as HARTMAN and EPIFANIO (1973), PRUDER and al. (1976), have attempted to establish appropriate food rations in laboratory for various post larvae mollusks according to their average weight. However, it is difficult to adapt those results to hatchery experiments, since raising conditions and yield issues are totally different. The purpose of this work is to determine nutritional rations required for different post...
Tipo: Text
Palavras-chave: Crassostrea gigas; Ostrea edulis; Artificial feeding; Oyster culture; Food composition.
Ano: 1978
URL: http://archimer.ifremer.fr/doc/1978/rapport-1758.pdf

Compte rendu de la réunion des 14 et 15 Avril 1993 - La Tremblade - Réseau Génétique Mollusques (REGEMO)
Provedor de dados: 5
Autores: Gerard, Andre; Naciri, Yamama; Coatanea, Denis; Martin, Anne-genevieve; Barret, Jean; Claude, Serge; Heurtebise, Serge; Devauchelle, Nicole; Joly, Jean-pierre; Goulletquer, Philippe; Baud, Jean-pierre; Nourry, Max; Bougrier, Serge; Renault, Tristan; Cochennec, Nathalie; Chollet, Bruno; Le Deuff, Rose-marie; Peignon, Jean-marie.
La discussion générale organisée à la fin de la deuxième journée a fait ressortir les points suivants: 1- Les participants se sont déclarés satisfaits de la tenue de la réunion, tant dans son déroulement, que dans les échanges d'informations auxquels elle a donné lieu. La quantité et la qualité des résultats présentés a permis de mettre en évidence la puissance d'analyse que représente le travail en réseau. 2-L'importance de la valorisation des résultats a été soulignée à plusieurs reprises. La diffusion de l'information devrait se faire dans un premier temps par la voie de rapport internes à la DRV, puis par la voie d'articles publiés dans des revues scientifiques. Sur le programme "C. gigas triploïdes", une première diffusion des résultats obtenus en...
Tipo: Text
Palavras-chave: Génétique; Sélection génétique; Huître plate; Ostrea edulis; Génétique population; Croissance.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00049/15981/13423.pdf

Différenciation génétique des populations d'huître plate européenne, Ostrea edulis, à l'aide de marqueurs des génomes mitochondrial et nucléaire
Provedor de dados: 5
Autores: Lapegue, Sylvie; Diaz-almela, E.; Launey, Sophie; Ledu, Christophe; Boudry, Pierre; Naciri-graven, Yamama; Bonhomme, Francois.
Two oyster species are cultivated on the French coasts: the Pacific cupped oyster (Crassostrea gigas), which has been introduced from Japan in the 1970's after the disappearance of the Portuguese oyster Crassostrea angulala, and the European flat oyster (Ostrea edulis). During the second half of the 1960's, the latter suffered successively from two diseases caused by protozoan parasites: marteiliosis (also called "maladie des Abers") and bonamiosis. In France, its production dropped from 20,000 tian in the 1960's to 2,000 today. The impact of these two pathogens as well as the exploitation of the remaining stocks show the importance of the conservation of this species, the only natural European species, whose population is more and more fragmented.
Tipo: Text
Palavras-chave: Marqueurs; Génétique population; Génétique; Ostrea edulis; Crassostrea gigas.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/acte-3273.pdf

La bonamiose un fléau de l'huître plate....
Provedor de dados: 5
Autores: Morga, Benjamin.
The history of French oyster culture shows very well how fragile this farming is to stock overexploitation and diseases. The production of flat oyster, Ostrea edulis, fell dramatically after the appearance of two parasitic diseases: arteiliosis and bonamiosis. The curative means against bonamiosis (Bonamia ostreae) are restricted and imply a good knowledge of the parasite's life cycle and of its interaction with its host. Studying the expression of the parasite's and the host's genes during the infection seems essential in providing new adapted measures in order to maintain, if not relaunch the flat oyster culture. In this context, this thesis aims to understand the flat oyster-parasite interactions, and especially, the molecular basis of the resistance to...
Tipo: Text
Palavras-chave: Biologie moléculaire; Gene; Parasite; Huîtres; Ostrea edulis.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3369.pdf

Needle in a haystack: involvement of the copepod Paracartia grani, in the life-cycle of the oyster pathogen Marteilia refringens
Provedor de dados: 5
Autores: Audemard, Corinne; Le Roux, Frédérique; Barnaud, Antoine; Collins, Catherine; Sautour, B; Sauriau, Pierre-guy; De Montaudouin, X; Coustau, C; Combes, C; Berthe, Franck.
Marteilia refringens is a major pathogen of the European flat oyster, Ostrea edulis Linnaeus. Since its description, the lifecycle of this protozoan parasite has eluded discovery. Attempts to infect oysters experimentally have been unsuccessful and led to the hypothesis of a complex life-cycle involving several hosts. Knowledge of this life-cycle is of central importance in order to manage oyster disease. However, the exploration of M. refringens life-cycle has been previously limited by the detection tools available and the tremendous number of species to be screened in enzootic areas. In this study, these two restrictions were circumvented by the use of both molecular detection tools and a mesocosm with low biodiversity. Screening of the entire fauna of...
Tipo: Text
Palavras-chave: Experimental transmission; In situ hybridization; PCR; Paracartia grani; Ostrea edulis; Marteilia refringens.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-2778.pdf

Flow cytometry to measure impact of temperature and salinity on the survival of Bonamia ostreae, parasite infecting flat oyster Ostrea edulis, in seawater
Provedor de dados: 5
Autores: Arzul, Isabelle; Bond, Celine; Gagnaire, Beatrice; Morga, Benjamin; Chollet, Bruno; Ferrand, Sylvie; Robert, Maeva; Renault, Tristan.
Bonamiosis due to the intrahaemocytic protistan parasite Bonamia ostreae is a European endemic disease affecting the flat oyster, Ostrea edulis. After its first description in June 1979&amp;#305; in Brittany, the parasite rapidly spread to all French oyster farming areas and in other European countries through transfers of live molluscs. The parasite has been described in different ecosystems from estuaries to open sea and no clear correlations could he demonstrated between the disease development and environmental parameters like temperature or salinity. The infection can he directly transmitted by cohabitation between infected and non infected oysters. Nevertheless, the parasite life cycle, including its survival outside the host, is not completely...
Tipo: Text
Palavras-chave: Impact; Salinity; Temperature; Flow cytometry; Bonamia ostreae; Parasite; Ostrea edulis; Oyster.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3372.pdf

Contribution à la validation de la technique de PCR pour la détection du parasite Bonamia ostreae chez l'huître plate, Ostrea edulis
Provedor de dados: 5
Autores: Dubois, Rodolphe.
Bonamia ostreae, l'agent de la bonamiose, est un parasite intracellulaire ayant pour cible les hémocytes (cellules du système de défense) de l'huître plate ostrea edulis. Il induit chez son hôte des lésions branchiales, telles que des perforations ou des indentations pouvant aller jusqu'à la mort du mollusque. Le travail réalisé au cours de ce stage s'inscrivait dans une démarche de validation de méthode de PCR (Polymerase Chain Reaction) pour la détection de ce parasite. Les analyses ont porté sur un lot de trois cent onze huîtres plates ostrea edulis adultes (2-3 ans), issus de captage naturel et provenant de Quiberon (Bretagne). Pour chaque individu, une extraction d'ADN a été réalisée sur un échantillon de coeur et de branchies. Afin de déterminer si...
Tipo: Text
Palavras-chave: Bonamia Ostreae; Agent pathogène; Bonamiose; Hémocytes; Huître plate; Ostrea edulis; PCR; Validation.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00369/47989/48017.pdf

Flow cytometry characterisation of defense cellular mechanisms  from flat oyster, Ostrea edulis, parasited with Bonamia ostreae
Provedor de dados: 5
Autores: Garcia, Sandrine.
Tipo: Text
Palavras-chave: Cytometry; Disease resistance; Protozoa; Ostrea edulis.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/rapport-1925.pdf

Compléments d'observations sur le cycle du parasite, Marteilia refringens (Grizel et coll. 1974)
Provedor de dados: 5
Autores: Tige, Gilbert; Grizel, Henri; Langlade, Aime; Rabouin, Marie-agnès.
Les premiers stades connus du parasite ont été mis en évidence en Bretagne pendant les mois de juillet et d'août (GRIZEL et TIGE, 1977). Suite à ces observations, un essai a été réalisé en 1978 pour savoir si l'infestation avait bien lieu à ces dates ou si elle se faisait antérieurement sous une forme non décelée actuellement et subissant des transformations profondes dans les tissus de l'huître. Les résultats montrent que l'infestations se fait effectivement pendant l'été, à partir du mois de juillet jusqu'à la fin du mois d'août. Elle fut dans l'ensemble faible; les lots les plus infestés sont ceux qui ont séjourné le plus longtemps en zone contaminée.
Tipo: Text
Palavras-chave: Ostrea edulis; Marteilia refringens; Pathologie; Parasite.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/acte-6098.PDF

Sporulation d'Haplosporidium sp. (Haplosporida, Haplosporidiiidae) chez l'huître Ostrea edulis L. du bassin d'Arcachon (France)
Provedor de dados: 5
Autores: Pichot, Yves.
The life cycle of Haplosporidium sp., Haplosporida recently observed in the flat oyster of the bassin d'Arcachon (France), and the spore characteristics of which have already been presented (Pichot et al., 1979), has been studied by electron microscopy. The first stages of sporUïation are represented by two types of plasmodia. After the stage of sporonts, sporogenesis seems to develop according ,~ to two sequences. In a first sequence a cytoplasmic syncytium is formed, followed by the condensation of cytoplasm that would lead to the individualisation of uninucleate sporoblasts and anucleate cytoplasm fragments. The spores could result from the enclosing of the sporoblasts by the cytoplasmic fragments. In a second sequence the spores differenciation happens...
Tipo: Text
Palavras-chave: Arcachon; Ostrea edulis; Pathogen of oyster; Haplosporidium sp.; Sporulation; Bassin d'Arcachon; Ostrea edulis; Pathogène Huître; Haplosporidium sp.; Sporulation.
Ano: 1986
URL: https://archimer.ifremer.fr/doc/1986/publication-5916.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

The use of SNPs in characterizing oysters genomes and their resistance to pathogens
Provedor de dados: 5
Autores: Lapegue, Sylvie; Heurtebise, Serge; Harrang, Estelle; Morga, Benjamin; Flahauw, Emilie; Sauvage, Christopher; Boudry, Pierre.
During the last five years, a great effort has been made to develop genomic tools in oyster species all over the world. In Europe, the Pacific cupped oyster, Crassostrea gigas, and the European flat oyster, Ostrea edulis received a special attention as they are the key species for local aquaculture. In particular, the Pacific oyster is a marine bivalve of major economical and ecological importance worldwide. Better knowledge of its physiology and its genetics contributes to optimize its aquaculture production using selective breeding or to understand its invasive behavior in some coastal areas. Current international developments of genomic resources include EST databases, BAC libraries, genome mapping and sequencing. The Genoscope (Evry, France) and the...
Tipo: Text
Palavras-chave: Oysters; Crassostrea gigas; Ostrea edulis; Resistance pathogens; QTLs; Single Nucleotide Polymorphism.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00015/12584/9454.pdf

Evaluation du recrutement d'huîtres plates (Ostrea edulis) collectées sur tuiles dans le quartier d'Auray (Bretagne)
Provedor de dados: 5
Autores: Martin, Anne-genevieve; Grizel, Henri; Langlade, Aime.
La région d'Auray avec la Baie de Quiberon et les rivières attenantes, est le seul centre de captage de l'huître plate en Bretagne. Celui-ci s'effectue sur des parcs situés en zone intertidale à partir de tuiles chaulées. La présente étude a permis de dénombrer les collecteurs posés durant la campagne de reproduction 1979 et d'évaluer le poids de naissain récolté. Celui-ci est de 516,36 +/- 45,36 tonnes pour un total de 19 383 000 tuiles. Les données obtenues seront utilisées ultérieurement pour analyser les performances du captage en fonction de la date et du mode de pose des collecteurs.
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Recrutement; Naissain; Collecteur; Auray; Baie Quiberon; Bretagne.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00009/11987/8691.pdf

Compte-rendu des résultats d'analyses effectuées en histologie - Année 1995
Provedor de dados: 5
Autores: Renault, Tristan; Cochennec, Nathalie; Chollet, Bruno.
Dans le cadre du Réseau zoosanitaires CEE (huître plate) et suivi d'autres espèces, 890 individus provenant des zones 5, 6 et 7 ont été examinés sur l'ensemble de l'année 1995 par différentes techniques : 472 analyses sous coupes histologiques, 328 analyses sur appositions d'organes, 90 analyses sur milieu au thioglycolate.
Tipo: Text
Palavras-chave: Pathologie; Analyse; Histologie; Technique; Bivalves; Ostrea edulis; Huître plate; Mytilus edulis; Ruditapes philippinarum; Ruditapes decussatus; Cerastoderma edule; Mortalité.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00044/15504/12877.pdf

Does the prevalence of Bonamia  and Marteilia diseases be reduced on flat oysters (Ostrea edulis) of Atlantic and Mediterranean origin, when they are reared together with the Japanese oyster (Crassostrea gigas) in tidal ponds?
Provedor de dados: 5
Autores: Bodoy, Alain; Bougrier, Serge; Geairon, Philippe; Garnier, Jacqueline; Boulo, Viviane; Heurtebise, Serge.
The flat oyster Ostrea edulis was originally reared in several regions of the European waters. The tidal saline ponds on the Atlantic coasts of France were highly productive before being hit by two consecutive epizooties. Parasitic diseases were described on this species, both of them leading 10 economic losses, as heavy mortalities have usually been recorded before the oysters reach the commercial size. Repeated experiments showed that the two diseases, Marteilia refringens and Bonamia ostreae are still active in this environment. Recently, some evidences were given that haemocytoblasts of Crassostrea gigas had the ability to lyze the Bonamia cells. Therefore, in an experiment of contiguous culture of the two species of oysters, the growth, mortality and...
Tipo: Text
Palavras-chave: Molluscs; Mortalities; Growth; Pathology; Crassostra gigas; Ostrea edulis; Marteilia refringens; Bonamia ostreae.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-3049.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

Epidémiologie de Bonamia ostreae et Marteilia refringens en Bretagne en 1984 et 1985 : situation et évolution
Provedor de dados: 5
Autores: Tige, Gilbert; De Kergariou, Gabriel; Cochennec, Nathalie; Rabouin, Marie-agnès.
A systematic surveillance progam conducted since 1980 along the coasts of Britanny has followed the evolution and epidemiological state of the natural O. eulis oyster beds and seed areas in the intertidal zones and deep water. Presently, Marteilia refringens exists endemically in Brittany estuaries ; the rate and degree of infestation varies from year to year depending on the hydrological conditions and the geographical region. In no case, however, is the return of flat oyster culture envisoned. Bonamia ostreae is present not only in the estuaries but also in the deep-water rearing areas (Baie de Quiberon, Cancale, Baie de St Brieuc). The infestation increases with age, but also depends on the quantity of the stock and the culture practises. In particular,...
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Maladie; Bonamia ostreae; Marteilia refringens; Bretagne; Oyster; Ostrea edulis; Diseases; Bonamia ostreae; Marteilia refringens.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00022/13299/10353.pdf

Mitochondrial and microsatellite genetic differentiation of the flat oyster Ostrea edulis along the european coasts, and comparison with allozyme data
Provedor de dados: 5
Autores: Lapegue, Sylvie; Diaz-almela, E.; Launey, Sophie; Ledu, Christophe; Boudry, Pierre; Naciri-graven, Yamama; Bonhomme, Francois.
Natural populations of the European flat oyster, Ostrea edulis, have been harvested since Roman times. This species is distributed along the European Atlantic coasts, from Norway to Morocco, as well as the Mediterranean Sea and Black sea coasts. Previous studies, based on allozymes, have concluded that isolation by distance is taking place in  the Mediterranean sea and the Atlantic ocean. Because of the presumed non neutrality of these markers, another approach was made to examine the genetic differentiation of this species using nuclear microsatellite and mitochondrial markers, both considered as neutral, and to compare the results to those observed with allozymes.
Tipo: Text
Palavras-chave: Microsatellite markers; Ostrea edulis; Flat oyster; Genetic.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/acte-3497.pdf

A preliminary genetic linkage map for the European flat oyster Ostrea eduli
Provedor de dados: 5
Autores: Lallias, Delphine; Lapegue, Sylvie; Halley, Chris; Boudry, Pierre; Beaumont, Andy.
The European flat oyster, Ostrea edulis, occurs naturally from Norway to Morocco in the North-Eastern Atlantic and throughout the Mediterranean. The oyster has been a harvested species for at least 6000 years. However, it successively suffered from over harvesting and then from two protozoan diseases during the 1960s and its production has drastically decreased in Europe from that time. Following two generations of selection for tolerance to one of these diseases (bonamiosis), our aim is to optimize this selection with the assistance of molecular markers, that is to say to implement marker-assisted selection. This will enhance the efficiency of selection by reducing the generation time, as the selection on sites cannot be made before the oysters are...
Tipo: Text
Palavras-chave: QTLs; Ostrea edulis; Genetic linkage map; Genetic; European flat oyster.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3473.pdf

Molecular detection and quantification of the protozoan Bonamia ostreae in the flat oyster, Ostrea edulis
Provedor de dados: 5
Autores: Robert, Maeva; Garcia, Celine; Chollet, Bruno; Lopez-flores, Inmaculada; Ferrand, Sylvie; Francois, Cyrille; Joly, Jean-pierre; Arzul, Isabelle.
Bonamia ostreae is an intracellular protozoan which is recognized as a cause of mortality in European populations of flat oysters (Ostrea edulis). Based on the recent characterization of actin genes of B. ostreae, specific primers were designed for real-time PCR using SYBR® Green chemistry. Specificity was demonstrated by the unique melting temperature peak observed in positive samples and by the lack of amplification in samples of oysters infected by closely related parasites, including Bonamia exitiosa. A calibration curve using a cloned template was defined to estimate copy number. The assay had a 6 log- dynamic range, mean inter- and intra-assay variation coefficients of &lt;1% and a minimum detection limit of 50 gene copies per reaction. Using...
Tipo: Text
Palavras-chave: Heart imprints; Ostrea edulis; Quantification; Detection; Real time PCR; Bonamia ostreae.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6934.pdf

Infection dynamics of Marteilia refringens in flat oyster Ostrea edulis and copepod Paracartia grani in a claire pond of Marennes-Oleron Bay
Provedor de dados: 5
Autores: Audemard, Corinne; Sajus, Marie-céline; Barnaud, Antoine; Sautour, Benoît; Sauriau, Pierre-guy; Berthe, Franck.
The protozoan parasite Marteilia refringens has been partly responsible for the severe decrease in the production of the European flat oyster Ostrea edulis Linnaeus in France since the 1970s. The calanoid copepod Paracartia grani Sars was recently found to be a host for M refringens in French shallow-water oyster ponds ('claires'). This study reconsidered M refringens transmission dynamics in the light of this finding, taking into account not only oyster infection dynamics and environmental factors but also data concerning the copepod host. P. grani population dynamics in the claire under study revealed that this species is the dominant planktonic copepod in this confined ecosystem. During winter, M refringens overwintered in O. edulis, with P. grani...
Tipo: Text
Palavras-chave: Claire pond; Infection dynamics; Paracartia grani; Ostrea edulis; Marteilia refringens.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-2858.pdf

Essais de caractérisation moléculaire des parasites du genre Marteilia (Phylum Paramyxea) à l'aide de l'ADNr
Provedor de dados: 5
Autores: Rodriguez, David.
Les parasites du genre Marteilia sont responsables de graves épizooties et sont retrouvés dans une communauté très variable de mollusques bivalves marins. Toutefois ces protistes restent difficiles à classer à l'intérieur du genre du fait que les données morphologiques sont insuffisantes pour distinguer avec précision deux espèces données. Ceci est le cas pour Martilia refringens, affectant l'huître plate Ostrea edulis ou la moule (Mytilus edulis et Mytilus galloprovincialis), Marteilia sp. et Marteilia maurini affectant les deux espèces de moules. C'est pourquoi, nous avons tenté d'isoler, par PCR, le gène codant pour l'ARN 18S, les ITS1 et ITS2 ainsi que le gène codant pour l'ARN 5,8S des parasites présents chez l'huître plate et la moule (M. edulis),...
Tipo: Text
Palavras-chave: Parasite; Marteilia; PCR; Ostrea edulis; Mytilus edulis; Biologie moléculaire.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00032/14352/11636.pdf

Compte rendu de la réunion REGEMO sur l'amélioration génétique de l'huître plate du 11 mars 1998 à Nantes : Bilan actualisé du programme de sélection
Provedor de dados: 5
Autores: Goyard, Emmanuel; Lapegue, Sylvie; Cochennec, Nathalie; Baud, Jean-pierre; Langlade, Aime; Joly, Jean-pierre; Buestel, Dominique; Oheix, Jocelyne; Haure, Joel.
Le programme de sélection de l'huître plate a été initié en 1985 par des pathologistes de la Tremblade. La sélection ne portait que sur le seul critère de tolérance des huîtres plates au parasite Bonamia ostreae et correspondait plus à un outil pour étudier divers aspects de la parasitose qu'un un programme d'amélioration génétique visant la relance de la culture de l'huître plate. Dans le cadre du réseau REGEMO, ce programme a ensuite été repris par les généticiens de l'Ifremer : 1) rappel historique et définition d'un vocabulaire commun à l'ensemble des membres du réseau REGEMO. 2) Inventaire et bilan des opération menées ou en cours ( sur la dernière génération de sélection produite ne 1995, sur le matériel issu de cette génération et produit en 1997....
Tipo: Text
Palavras-chave: Génétique; Sélection génétique; Huître plate; Ostrea edulis; Génétique population; Croissance.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00049/15977/13419.pdf

Programme Herpèsvirus. Synthèse des travaux réalisés au Laboratoire IFREMER de La Tremblade - Mars 1996 - Février 1997
Provedor de dados: 5
Autores: Renault, Tristan; Le Deuff, Rose-marie; Lipart, Cecile; Chollet, Bruno; Haffner, Philippe.
Ce rapport représente la synthèse des travaux réalisés de mars 1996 à février 1997 au laboratoire de Génétique, Aquaculture et Pathologie de la station IFREMER de La Tremblade, dans le cadre de l'étude du virus de type herpès observé chez les huîtres et de la mise au point de méthodes de diagnostic. La majorité des travaux rapportés ici de façon complète, a déjà fait l'objet de comptes rendus intermédiaires.
Tipo: Text
Palavras-chave: Pathologie; Herpèsvirus; Herpesviridae; Huître creuse; Crassostrea gigas; Huître plate; Ostrea edulis; Virus; Détection; ¨Protocole; ADN; PCR.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00165/27663/25838.pdf

Etudes sur la pathologie des huîtres
Provedor de dados: 5
Autores: Balouet, G.
French summary: In 1974, at the request of a group of oyster farmers in the Brittany region, the Pathology Laboratory of the U.E.R. Medicine of Brest undertook a series of theoretical and applied research projects concerning the problem of flat oyster digestive gland disease, due to Marteilia refringens, the primary economic problem of that time.  In 1978, in the research report of Contract C.N.E.X.O. 77/1690, the main results obtained since the beginning of the study of the parasitosis were made public. The present report has as its objective to show: - The results obtained in 1978-1979 while monitoring the parasitosis, and most especially the epidemiological evolution of the disease; - Information concerning the presence of other infectious diseases...
Tipo: Text
Palavras-chave: Parasite; Ostrea edulis; Oyster; Pathology.
Ano: 1978
URL: http://archimer.ifremer.fr/doc/1978/rapport-1927.pdf

Experimental transmission of Marteilia refringens with special consideration of its life cycle
Provedor de dados: 5
Autores: Berthe, Franck; Pernas, Maria; Zerabib, Maamar; Haffner, Philippe; Thebault, Anne; Figueras, Antonio.
Ever since its first description the paramyxean parasite Marteilia refringens has been recognised as one of the most significant pathogens of bivalve molluscs. The existence of a complex life cycle has been postulated by many authors. However, the transmission route of M. refringens and its life cycle remain unresolved. Experimental observations are presented here that may help lead to a satisfactory hypothesis of the M. refringens life cycle. Trials were performed to test the infectivity of purified early and late stages of M. refringens by different routes of inoculation. Horizontal transmission was also tested by cohabitation with carriers in experimental tanks. Field cohabitation and exposure to natural sources of the parasite helped examine the role...
Tipo: Text
Palavras-chave: Marteilia refringens; Ostrea edulis; Transmission trial.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/1998/publication-2742.pdf

Observations relatives à la maladie des huîtres plates dans le bassin d'Arcachon, vitesse d'infestation et réactions pathologiques
Provedor de dados: 5
Autores: His, Edouard; Tige, Gilbert; Rabouin, Marie-agnès.
D'Avril 1974 à Décembre 1975, un lot d'huîtres plates provenant du Golfe de Morbihan, zone encore non parasitée, a été placé en élevage dans une claire des Hosses située dans le bassin d'Arcahon. L'infestation des huîtres par Marteilia refringens a été suivie sur coupes histologiques et, conjointement des enregistrements de l'activité valvaire ont été effectués à l'aide de deux ostréographes. L'association de ces techniques a permis de mettre en évidence un dérèglement de l'activité valvaire coïncidant avec l'apparition de Marteilia refringens chez l'hôte. Des réactions caractéristiques de types pathologiques ont été enregistrées chez les huîtres gravement atteintes.
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Pathologie; Maladie; Bassin Arcachon.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/00015/12625/9510.pdf

The Native Oyster Restoration Alliance (NORA) and the Berlin Oyster Recommendation: bringing back a key ecosystem engineer by developing and supporting best practice in Europe
Provedor de dados: 5
Autores: Pogoda, Bernadette; Brown, Janet; Hancock, Boze; Preston, Joanne; Pouvreau, Stephane; Kamermans, Pauline; Sanderson, William; Von Nordheim, Henning.
Efforts to restore the native oyster Ostrea edulis and its associated habitats are gaining momentum across Europe. Several projects are currently running or being planned. To maximize the success of these, it is crucial to draw on existing knowledge and experience in order to design, plan and implement restoration activities in a sustainable and constructive approach. For the development of best practice recommendations and to promote multidimensional knowledge and technology exchange, the Native Oyster Restoration Alliance (NORA) was formed by partners from science, technology, nature conservation, consultancies, commercial producers and policy-makers. The NORA network will enhance scientific and practical progress in flat oyster restoration, such as in...
Tipo: Text
Palavras-chave: Ostrea edulis; Berlin Oyster Recommendation; Biogenic reef; Ecosystem service; Biodiversity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00500/61192/64723.pdf

Emergence de maladies chez les organismes d'intérêt aquacole : quelques scénarios illustrés d'exemples
Provedor de dados: 5
Autores: Saulnier, Denis; Reynaud, Yann; Arzul, Isabelle; Miossec, Laurence; Le Roux, Frédérique; Goarant, Cyrille.
According to the world organisation for animal health (OIE) an emerging disease is defined as a recently admitted serious illness, whose aetiology can, or not, have already been established, and which is likely to be propagated within a population or between populations, for example at the time of international exchanges of aquatic animals and/or products of aquatic animals. Even though the emerging diseases that affect human health have been much studied, those which affect marine organisms and species of aquaculture interest in particular are poorly documented. By restricting emergence to only infectious diseases, we aim at presenting in a non-exhaustive way some scenarios of the emergence of the diseases of aquacultured species by illustrating them with...
Tipo: Text
Palavras-chave: Cyprinus carpio; Ostrea edulis; Bonamia ostreae; Peneides; Vibrio nigripulchritudo; Herpesvirus; Agent pathogène.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2980.pdf

Validation of in situ hybridisation and histology assays for the detection of the oyster parasite Marteilia refringens
Provedor de dados: 5
Autores: Thebault, Anne; Bergman, S; Pouillot, R; Le Roux, Frédérique; Berthe, Franck.
An in situ hybridisation technique has been developed for the detection of infection in oysters with Marteilia refringens with particular emphasis on light infections or confirmation of suspected cases by means of histology. Although validation of new diagnostic methods is usually achieved by comparison with standard techniques, in our case the sensitivity and specificity of the standard (histology) had not previously been established. Another point to consider is that surveillance and monitoring frequently target populations displaying different levels of prevalence under different field conditions. The objective of our study was to evaluate the sensitivity and specificity values of in situ hybridisation and histology for the detection of M refringens,...
Tipo: Text
Palavras-chave: Ostrea edulis; Marteilia refringens; Latent models; Specificity; Sensitivity; Validation; Diagnostic.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-3624.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

Analyse du succès reproducteurs chez des populations naturelles et d'écloserie d'huître plate Ostrea edulis L.
Provedor de dados: 5
Autores: Lallias, Delphine.
Cette étude vise à approfondir la connaissance de la biologie de la reproduction de l'huître plate Ostrea edulis afin de mieux comprendre comment les caractéristiques de la biologie de reproduction de l'espèce peuvent rendre compte des phénomènes de déficits en hétérozygote et de relation positive entre hétérozygotie et croissance. En particulier, elle vise à analyser le succès reproducteur en milieu naturel et dans les populations maintenues en écloserie. Cette étude repose sur l'utilisation de marqueurs microsatellites qui, du fait de leur fort polymorphisme, représentent des outils puissants d'assignation de parenté. Une première partie de l'étude a consisté à analyser les pontes issues de femelles incubantes prélevées dans le milieu naturel. Le nombre...
Tipo: Text
Palavras-chave: Ostrea edulis; Microsatellites; Biologie de la reproduction; Variance du succès reproducteur.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00370/48167/48281.pdf

Larval development and fatty acid composition of Ostrea edulis (L.) fed four different single diets from conditioning to pre-settlement
Provedor de dados: 5
Autores: Gonzalez-araya, Ricardo; Robert, Rene.
Survival, growth and fatty acid composition of Ostrea edulis larvae (L.) fed four different single species, microalgal diets, Tisochrysis lutea (T), Chaetoceros neogracile (Cg), Skeletonema marinoi (Sm) or Tetraselmis suecica (Ts) from broodstock to pre-settlement, were studied. Lower larval growth (5.5m to 6.5m/d) was recorded in progeny continuously fed single S.marinoi or T.suecica, whereas good growth was achieved with single T.lutea (7.8m/d). Larvae, originated from broodstock receiving Sm or Ts, exhibited growth compensation when fed a bispecific balanced diet (TCg). This did not occur when broodstock and larvae were fed Cg or T, for which single or mixed diets led to similar larval growth. Furthermore, survival was high (&gt;90%) regardless of...
Tipo: Text
Palavras-chave: Broodstock conditioning; Diet; Larval development; Ostrea edulis.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00438/54986/56483.pdf

Marteilia refringens and Marteilia pararefringens sp. nov. are distinct parasites of bivalves and have different European distributions
Provedor de dados: 5
Autores: Kerr, R.; Ward, G. M.; Stentiford, G. D.; Alfjorden, A.; Mortensen, S.; Bignell, J. P.; Feist, S. W.; Villalba, A.; Carballal, M. J.; Cao, A.; Arzul, Isabelle; Ryder, D.; Bass, D.
Marteilia refringens causes marteiliosis in oysters, mussels and other bivalve molluscs. This parasite previously comprised two species, M. refringens and Marteilia maurini, which were synonymized in 2007 and subsequently referred to as M. refringens ‘O-type’ and ‘M-type’. O-type has caused mass mortalities of the flat oyster Ostrea edulis. We used high throughput sequencing and histology to intensively screen flat oysters and mussels (Mytilus edulis) from the UK, Sweden and Norway for infection by both types and to generate multi-gene datasets to clarify their genetic distinctiveness. Mussels from the UK, Norway and Sweden were more frequently polymerase chain reaction (PCR)-positive for M-type (75/849) than oysters (11/542). We did not detect O-type in...
Tipo: Text
Palavras-chave: Marteilia refringens; Marteilia pararefringens; ITS1 rDNA; IGS rDNA; Paramyxida; Ascetosporea; Mytilus edulis; Ostrea edulis.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00444/55566/57177.pdf

European flat oyster - Ostrea edulis
Provedor de dados: 5
Autores: Lapegue, Sylvie; Beaumont, A.; Boudry, Pierre; Goulletquer, Philippe.
The European flat oyster, Ostrea edulis, a native of Europe, occurs naturally from Norway to Morocco in the North-Eastern Atlantic and in the whole Mediterranean Basin; It has been a harvested species for at least 6000 years. Natural populations are also observed in eastern North America, from Maine to Rhode Island, following intentional introductions in the 1940s and 1950s. The species was also introduced in Canada for aquaculture purpose 30 years ago and some populations naturalised in Nova Scotia, New Brunswick and British Columbia. These stocks were imported from naturalised populations in Maine whose ancestors originated in the Netherlands.
Tipo: Text
Palavras-chave: Genetics; Ecology; Biology; Ostrea edulis; Oysters.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3321.pdf

Micro-organismes de type Rickettsien chez les huîtres Crassostrea gigas Th. et Ostrea edulis L.
Provedor de dados: 5
Autores: Comps, Michel; Tige, Gilbert; Duthoit, Jean-louis; Grizel, Henri.
Some rickettsian infections have been found in French Atlantic oysters, Crassostrea gigas and Ostrea edulis. The micro-organisms parasite the digestive diverticulum epithelium cells although not creating any damage that could strongly affect the molluscs. If not for its shape, which appears to be longer in the case of the Crassostrea gigas Rickettsia, the characteristics of these two micro-organisms seem pretty close and enabled their inclusion in the Rickettsial order.
Tipo: Text
Palavras-chave: Rickettia; Ostrea edulis; Crassostrea gigas; Huîtres; Pathologie; Infections.
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/acte-6173.PDF

Integration of shellfish farming activies in three French coastal environments : Mont Saint-Michel Bay, Gulf of Morbihan, and Marennes-Oleron Bay
Provedor de dados: 5
Autores: Mazurie, Joseph; Le Mao, Patrick; Camus, Patrick; Bacher, Cedric; Goulletquer, Philippe.
Integration of shellfish farming along the French shoreline (around 5500 km) has been progressive, as marine bivalve culture is a traditional activity in our country. The history of mussel culture relates that the "bouchot" technique (intertidal culture on wooden poles, producing annually around 60,000 tons) was developed as early as the XIIIth century, by a refugee attempting to capture birds by sticking branches of brushwood along the shore. The European flat oyster, Ostrea edulis, already appreciated at the Roman period, was first cultivated in France after Victor Coste introduced the technique of spat collection at the end of the XIXth century. The Pacific cupped oyster, genus Crassostrea, now the most-cultivated in France (around 120,000 tons marketed...
Tipo: Text
Palavras-chave: Trophic capacity; Trophic resource; Nature conservation; Coastal zone management; Biodiversity; Mytilus edulis; Mussels; Integration; Ostrea edulis; Crassostrea gigas; Oysters.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/acte-3400.pdf

Etude du cycle de Marteilia refringens dans l'Etang de Thau
Provedor de dados: 5
Autores: Comps, Michel.
Since the beginning of the epizooty of the flat oyster Ostrea edulis on the Atlantic coast (Comps, 1970), it has been observed that the parasitosis did not develop in the Mediterranean Sea in oysters from the Thau lagoon even though a large part of the culture is made up of young oysters from Brittany. However, some episodic studies only rarely found the presence of Marteilia refringens in the oysters from the lagoon.
Tipo: Text
Palavras-chave: Marteilia refringens; Ostrea edulis; Pathologie; Parasite.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/acte-6078.PDF

Comparison of Heamograms from resistant and susceptible European flat oysters, Ostrea edulis, exposed to the parasite, Bonamia ostreae
Provedor de dados: 5
Autores: Cochennec, Nathalie; Renault, Tristan; Chollet, Bruno; Maffart, Patricia.
To study the cellular defence mechanisms involved in the resistance of the flat oysters against Bonamia ostreae, a comparaison of haemograms was performed between susceptible and resistant animals
Tipo: Text
Palavras-chave: Pathogen; Bonamia ostreae; Ostrea edulis.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/acte-2906.pdf

REGEMO Réseau Génétique Mollusques. Compte rendu de la réunion des 13 et 14 décembre 1993 - Nantes
Provedor de dados: 5
Autores: Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Baud, Jean-pierre; Nourry, Max; Haure, Joel; Coatanea, Denis; Oheix, Jocelyne; Vercelli, Catherine; Chabirand, Jean-michel; Borel, Michel; Maurer, Daniele; Heurtebise, Serge; Garnier, Jacqueline; Martin, Anne-genevieve; Tige, Gilbert; Mazurie, Joseph; Langlade, Aime.
Cette réunion des membres du Réseau Génétique Mollusques avait pour objet de faire un bilan provisoire des actions en cours et surtout de mettre en place les protocoles et les calendriers du début de l'année 1994. La première demi-journée a été réservée à un exposé de Yamama NACIRI sur les bases de la Génétique Quantitative et ses applications dans le cadre des programmes de sélection des mollusques.La deuxième demi-journée a été consacrée au bilan des actions de 1993. Les représentants de chaque site, intervenant dans une opération du réseau en 1993, ont fait une présentation orale de leurs résultats. Un résumé de chaque intervention vous est fourni dans ce document. Il est important de souligner que tous ces bilans sont provisoires, en premier lieu parce...
Tipo: Text
Palavras-chave: Génétique; Sélection génétique; Huître plate; Ostrea edulis; Croissance; Génétique population.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00049/15982/13425.pdf

Herpesvirus infection in European flat oysters Ostrea edulis obtained from brood stocks of various geographic origins and grown in Galicia (NW Spain)
Provedor de dados: 5
Autores: Da Silva, P; Renault, Tristan; Fuentes, J; Villalba, A.
We evaluated differences in productive traits and disease susceptibility among Ostrea edulis stocks. We produced 4 to 5 families from each of 4 oyster populations (Irish, Greek and 2 Galician) in a hatchery. Spat corresponding to 19 different families were transferred to a raft in the Ria de Arousa (Galicia, Spain) for grow-out. Samples of each family were histologically processed every month for 2 yr. One of the pathological conditions disclosed by histological examination was characterised by the occurrence of numerous abnormal cells throughout the connective tissue of various organs, showing hypertrophied nuclei with marginated chromatin and a characteristic large intranuclear acidophilic inclusion. Ultrastructural examination showed that the abnormal...
Tipo: Text
Palavras-chave: In situ hybridisation; Transmission electron microscopy; Histology; Bonamiosis; Ostreid herspesvirus 1; Ostrea edulis.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3735.pdf

Diversité et différentiation génétique chez l'huître plate européenne : de la population à l'individu (Actes)
Provedor de dados: 5
Autores: Boudry, Pierre; Launey, Sophie; Diaz-almela, A.; Naciri-graven, Yamama; Ledu, Christophe; Mira, S.; Taris, Nicolas; Bonhomme, Francois; Lapegue, Sylvie.
PCR-based DNA markers enable the study of diversity and differentiation of marine organisms at different stages of their life cycle. Our study of European fiat oyster (Ostrea edulis) populations aimed to describe their spatial and temporal dynamics. First, we analyzed adults sampled over the natural range of the species. An Atlantic/Mediterranean differentiation pattern was observed. Similar patterns of variation were found using allozymes, microsatellites and mitochondrial DNA, aIl which support an isolation by distance model. High variability was observed in the range of diversity between populations using a mitochondrial marker, a reflection of small effective population sizes in sorne locations. A 10fold quantitative difference was observed in Fst,...
Tipo: Text
Palavras-chave: Recruitment; Diversity; Molecular markers; Population genetics; Ostrea edulis; Flat oyster; Dynamique de recrutement; Diversité génétique; Microsatellites; Marqueurs moléculaires; Génétique des populations; Ostrea edulis; Huître plate.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/acte-2851.pdf

NORA moving forward: Developing an oyster restoration network in Europe to support the Berlin Oyster Recommendation
Provedor de dados: 5
Autores: Pogoda, Bernadette; Boudry, Pierre; Bromley, Cass; Cameron, Tom C.; Colsoul, Bérenger; Donnan, David; Hancock, Boze; Hugh‐jones, Tristan; Preston, Joanne; Sanderson, William G.; Sas, Hein; Brown, Janet; Bonacic, Kruno; Nordheim, Henning; Zu Ermgassen, Philine S.e.
The Native Oyster Restoration Alliance (NORA) supports the protection and ecological restoration of the native European oyster, Ostrea edulis, and its habitat across its current and historical biogeographical range. NORA works to overcome barriers to the conservation, restoration, and recovery of the European oyster by providing a platform for the NORA community to collaborate and participate in knowledge exchange. NORA seeks to support responsible restoration practice, in compliance with biosecurity and sustainability. Against this background, the NORA community formulated a series of specific recommendations, the Berlin Oyster Recommendation, to support native oyster restoration by developing and applying best practice with the aim to recover healthy and...
Tipo: Text
Palavras-chave: Ecological restoration; Native Oyster Restoration Alliance; Ostrea edulis.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00659/77135/78451.pdf

A physiological and biochemical approach to selecting the ideal diet for Ostrea edulis (L.) broodstock conditioning (part A)
Provedor de dados: 5
Autores: Gonzalez-araya, Ricardo; Queau, Isabelle; Quere, Claudie; Moal, Jeanne; Robert, Rene.
To select the best microalgae for Ostrea edulis conditioning, four single species diets were fed to batches of broodstock, which were then compared using physiological and biochemical approaches. Ingestion and absorption were first studied, showing that Chaetoceros gracilis and Skeletonema marinoï were efficiently ingested (4.9–5.3 mg g−1 h−1) and absorbed (1.9–2.5 mg g−1 h−1) while Tetraselmis suecica led to the lowest physiological responses (0.36 and 0.12 mg g−1 h−1 respectively). When O. edulis were fed any microalgae except T-ISO with only 79 mg g−1, gonads accumulated carbohydrates from 116 to 141 mg g−1 and the extent of accumulation depended on the species supplied in the order T. suecica&lt;C. gracilis&lt;S. marinoï. When oysters were fed either...
Tipo: Text
Palavras-chave: Ostrea edulis; Conditioning; Algal diets; Ingestion; Absorption; Biochemical composition.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00033/14449/11748.pdf

Sur la fixation des larves d'Ostrea edulis en présence de Pleurobrachia et de Noctiluca
Provedor de dados: 5
Autores: Marteil, Louis.
De nombreux auteurs ont signalé, après Kincaid (1915) et Dodgson (1922) que Pleurobrachia et Noctiluca peuvent être considérés comme des prédateurs des larves pélagiques d'O. edulis dont ils contribueraient à diminuer rapidement le nombre en s'en nourrissant.
Tipo: Text
Palavras-chave: Reproduction; Larves; Ostrea edulis; Prédateur; Pleurobrachia; Noctiluca.
Ano: 1964
URL: http://archimer.ifremer.fr/doc/00005/11581/8206.pdf

Diagnosis of herpes-like virus infections in oysters using molecular techniques
Provedor de dados: 5
Autores: Renault, Tristan; Lipart, Cecile.
Several herpes-like virus infections have been reported since 1991 among different bivalve species around the world (Nicolas et al., 1992; Comps and Cochennec, 1993; Renault et al., 1994; Hine and Thome, 1997; Hine 1997). To date, detection of these infections has been strongly correlated with severe losses of oyster larvae and spat. The virus infections are currently diagnosed by laborious histologicai and transmission electron microscopical examinations. These techniques, however, facilitate neither rapid diagnosis nor the ability to analyse large sample numbers.
Tipo: Text
Palavras-chave: Diagnosis; Ostrea edulis; Crassostrea gigas; Herpes like virus.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/acte-2902.pdf

La bonamiose: caractérisation du parasite Bonamia ostreae et étude des ses interactions avec l'hôte, l'huître plate Ostrea edulis
Provedor de dados: 5
Autores: Besnard-cochennec, Nathalie.
La bonamiose, maladie due au protozoaire Bonamia ostreae a été détectée en 1979 pour la première fois en Bretagne au cours d'épisodes de mortalité. Depuis, cette maladie s'est propagée à tous les centres ostréicoles français, puis européens. Cette étude a pour objectif de décrire les compartiments du modèle B. ostreae/hémocyte de l'huître plates, Ostrea edulis et d'analyser leurs interactions in vivo et in vitro. La caractérisation enzymatique, antigénique et moléculaire du parasite a été réalisée. Ceci a permis de disposer d'une palette de réactifs pour la comparaison de ce parasite avec d'autres protozoaires. Ainsi, un parasite de l'huître creuse chinoise Crassostrea rivularis a té décrit, puis rapproché du genre Bonamia. La morphologie et l'équipement...
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Huître creuse chinois; Crassostrea rivularis; Bonamia ostreae; Enzymes; Résistance; Mécanisme de défense.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00211/32198/30635.pdf

Etude d'un parasite de la glande digestive observé au cours de l'épizootie actuelle de l'huître plate
Provedor de dados: 5
Autores: Grizel, Henri; Comps, Michel; Cousserans, François; Bonami, Jean-robert; Vago, Constantin.
Description, in electron microscopy, of the stages of a parasite observed in the digestive gland of the oyster Ostrea edulis during the epizooties which are currently spreading throughout flat oyster farms.
Tipo: Text
Palavras-chave: Pathologie; Ostrea edulis; Huitre; Epizootie; Parasite.
Ano: 1974
URL: http://archimer.ifremer.fr/doc/1974/publication-5921.PDF

Characterization of 27 microsatellite loci in the European flat oyster Ostrea edulis
Provedor de dados: 5
Autores: Lallias, Delphine; Stockdale, Ruth; Boudry, Pierre; Beaumont, Andy R.; Lapegue, Sylvie.
The flat oyster Ostrea edulis is native to Europe and populations have been severely depleted by the parasite Bonamia ostreae since the 1980s. Additional genetic markers are required to improve population genetics study and linkage map development for selection for B. ostrea-resistance in this species. Here, we characterized 27 novel microsatellite loci for O. edulis. Number of alleles per locus ranged from 6 to 25 and observed heterozygosity between 0.375 and 1. Null alleles were suggested at a few loci but most loci were in Hardy-Weinberg agreement enabling their reliable use in further population and mapping genetics approaches.
Tipo: Text
Palavras-chave: Universal tailed primer labelling; Oysters; Ostrea edulis; Microsatellites.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6421.pdf

Cellular and molecular responses of haemocytes from Ostrea edulis during in vitro infection by the parasite Bonamia ostreae
Provedor de dados: 5
Autores: Morga, Benjamin; Renault, Tristan; Faury, Nicole; Chollet, Bruno; Arzul, Isabelle.
Bonamia ostreae is a protozoan, affiliated to the order Haplosporidia and to the phylum Cercozoa. This parasite is intracellular and infects haemocytes, cells notably involved in oyster defence mechanisms. Bonamiosis due to the parasite B. ostreae is a disease affecting the flat oyster, Ostrea edulis. The strategies used by protozoan parasites to circumvent host defence mechanisms remain largely unknown in marine bivalve molluscs. In the present work, in vitro experiments were carried out in order to study the interactions between haemocytes from O. edulis and purified parasite. B. ostreae. We monitored cellular and molecular responses of oyster haemocytes by light microscopy, flow cytometry and real-time PCR 1, 2, 4 and 8 h p.i. Light microscopy was used...
Tipo: Text
Palavras-chave: Bonamia ostreae; Protozoan; Ostrea edulis; Haemocytes; Real-time PCR; Flow cytometry; Super oxide dismutase.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00037/14874/18001.pdf

Croissance des huîtres plates en claire et conditions hydrologiques
Provedor de dados: 5
Autores: Trochon, Pierre.
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Tipo: Text
Palavras-chave: Huîtres; Ostrea edulis; Croissance; Claires ostréicole; Seudre; Marennes Oléron.
Ano: 1960
URL: http://archimer.ifremer.fr/doc/00004/11497/8067.pdf

Etude sur la reproduction de l'huître plate Ostrea edulis dans les claires de la région de Marennes-Oléron
Provedor de dados: 5
Autores: Trochon, Pierre.
Les claires situées sur les deux rives de la Seudre, sur les côtes de Marennes, du Chapus et de l'Ile d'Oléron, sont des bassins creusés dans des terrains argileux. Elles sont alimentées en eau de mer par un système de chenaux et de ruissons, leurs affluents, pour un coefficient de marée en général égal ou supérieur à 70. Dans certaines claires, les ostréiculteurs déposent, au mois de Mai, des huîtres plates originaires de Bretagne ou d'Arcachon, âgées de trois ou quatre ans, à raison de 2, 3 et 4 huîtres par mètre carré. Dans ce milieu, sous quarante centimètres d'eau, elles vont pendant six ou sept mois, croître, engraisser et verdir.
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Reproduction; Claires ostréicoles; Marennes Oléron; Charente-Maritime.
Ano: 1954
URL: http://archimer.ifremer.fr/doc/00004/11500/8070.pdf

Studies of a European shellfish disease: Bonamia ostreae parasite of the flat oyster Ostrea edulis ; control and treatment. Final Report
Provedor de dados: 5
Autores: Bachere, Evelyne; Ifremer, Unité de Pathologie, Immunologie et Génétique Moléculaire des Invertébrés Marins, F-17390 La Tremblade, France; CEV, Centro Experimental de Vilaxoan, Conselleria de Pesca, Villagarcia de Arosa, Spain; CSIC, Consejo Superior Investigaciones Cientificas, Peira de Bouzas S/N, Avda E. Cabello 636208, Vigo, Spain; UCC, University College Cork, Dept of Zoology Cork, Ireland; FCR, Fisheries Research Center, Abbotstown, Castleknock, Dublin 15, Ireland; US, University of Southampton, Dept of Oceanography Southampton S09 5NH, United Kingdom.
Bonamia ostreae, an intrahemocytic protozoan parasite infecting the oyster Ostrea edulis, is responsible for an endemic disease affecting all intensive breeding areas of European countries. Epidemiological studies showed variable prevalences, 43% in Galicia (Spain), from 6% to 32% in France and 45% in the most important area of Ireland. The impact of oyster transfers, handlings, high densities have been implicated in the disease development but environmental stressors could be more involved than zootechnical methods. The effect of water temperature, salinity and tidal exposure were particulary examined to assess stress induced changes and determine physiological, biochemical and immunological state indices of oyster populations, which will contribute to...
Tipo: Text
Palavras-chave: Disease; Oyster; Ostrea edulis; Parasitology; Bonamia ostreae; Epidemiology.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00273/38383/36713.pdf

Can the protozoan parasite Bonamia ostreae infect larvae of flat oysters Ostrea edulis?
Provedor de dados: 5
Autores: Arzul, Isabelle; Langlade, Aime; Chollet, Bruno; Robert, Maeva; Ferrand, Sylvie; Omnes, Emmanuelle; Lerond, Sophie; Couraleau, Yann; Joly, Jean-pierre; Francois, Cyrille; Garcia, Celine.
Bonamia ostreae is an intracellular protistan parasite affecting flat oysters Ostrea edulis. It can be detected in juveniles but mortalities mainly affect oysters which are more than 2 years old. The parasite is usually observed inside haemocytes and sometimes free, notably in gill epithelia suggesting a parasite release through this organ. However, the infective form and ways of entry and release remain undetermined. Flat oysters incubate their larvae in their pallial cavity for 8–10 days before releasing them into the water column. Flat oysters in Bay of Quiberon in South Brittany (France) are known to be infected with B. ostreae since 1979 and is the most important area in France for O. edulis spat collection. Flat oysters incubating larvae were sampled...
Tipo: Text
Palavras-chave: Bonamia ostreae; Flat oyster; Ostrea edulis; Transmission; Larvae; Parasite life cycle.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00028/13898/12566.pdf

Création d'un banc d'Ostrea edulis
Provedor de dados: 5
Autores: Marteil, Louis.
Depuis 1945, nous avons entrepris en Bretagne la reconstitution des bancs naturels d'Ostrea edulis depuis longtemps disparus ou fortement appauvris. Cette oeuvre a été réalisée d'abord dans les centres de captage du littoral atlantique; elle a été étendue ultérieurement aux côtes de la Manche, de Brest à Cancale, et sur les côtes de Vendée, en baie de Noirmoutier. Les travaux sont réalisés par des organismes professionnels, des sociétés ou des personnes privées suivant qu'il s'agit de terrains voués à la pêche ou à la culture. A l'heure actuelle, plus de vingt gisements ont bénéficié de ces mesures.
Tipo: Text
Palavras-chave: Huîtres plates; Ostrea edulis; Bancs naturels; Restructuration; Bretagne.
Ano: 1965
URL: http://archimer.ifremer.fr/doc/00004/11503/8073.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

Monoclonal antibodies against Bonamia ostreae (Protozoa: Ascetospera), an intrahaemocytic parasite of flat oyster Ostrea edulis (Mollusca : Bivlavia)
Provedor de dados: 5
Autores: Rogier, Hervé; Hervio, Dominique; Boulo, Viviane; Clavies, Christine; Hervaud, Eliane; Bachere, Evelyne; Mialhe, Eric; Grizel, Henri; Pau, Bernard; Paolucci, Francis.
The protozoan Bonamia ostreae (Ascetospora), a paasite of the flat oyster Ostrea edulis, was purified by differential and isopycnic centrifugations. Mice of the strain Balb/c were immunized with purified parasites and hybridomas were prepared by fusion of immunized mouse splenocytes with the mouse myeloma cell line P3-X63-Ag8-653. From the fusion, 12 clones were isolated and saved. The resulting antibodies were characterized with a solid phase radioimmunoassay (RIA). Antibodies from 7 clones reacted only with B. ostreae and not with normal host tissue. Although some of the antibiodies identified. One of these antibodies (20B2-1B12) has an apparent association constant of ca 3 X 10(8) M-1 and bound to a number of different sites on the parasite. These...
Tipo: Text
Palavras-chave: Monoclonal antibodies; Oyster; Ostrea edulis; Bonamia ostreae.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/publication-2756.pdf

Note sur l'ostréiculture en Bretagne - Sud
Provedor de dados: 5
Autores: Marteil, Louis.
Le Morbihan est le principal centre européen de production et d'élevage de l'huître plate Ostrea edulis L. 3 500 parcs environ sont exploités dans les rivières d'Etel, de Plouharnel, de Crach, St-Philibert, Auray, de Penerf et du Golfe du Morbihan, 1 800 hectares sont ainsi livrés à la culture de la seul huître plate, 150 à 400 millions de naissains (et parfois plus) sont récoltés chaque année sur 12 millions de collecteurs, 3 000 tonnes d'huîtres de 2 ans et surtout de 3 ans sont livrées chaque année aux centres d'affinage ou d'élevage de France (Belon, Cancale, Morlaix, Paimpol, Marennes, etc...) et éventuellement de l'étranger (Angleterre, Irlande, Hollande), 500 tonnes d'huîtres sont livrées directement à la consommation (70 000 colis environ). Le...
Tipo: Text
Palavras-chave: Ostréiculture; Huître plate; Ostrea edulis; Gisement naturel; Captage; Pathologie.
Ano: 1954
URL: http://archimer.ifremer.fr/doc/00003/11465/8025.pdf

Diversité génétique et dynamique du recrutement chez l'huître plate Ostrea edulis L. 2002
Provedor de dados: 5
Autores: Taris, Nicolas.
Cette étude aborde la diversité génétique d'une espèce de bivalve marin, Ostrea edulis et plus particulièrement les interactions existant entre génétique (flux de gènes) et démographie (dynamique de reproduction) à l'échelle de la population. Elle repose sur l'utilisation de marqueurs microsatellites pour tenter de comprendre les facteurs participant à la mise ne place d'une structuration génétique au sein de laquelle peuvent être observés des phénomènes de déficit en hétérozygotes et de ration positive entre hétérozygotie et valeur sélective. L'un des objectifs est en particulier de tester l'hypothèse de consanguinité à l'échelle locale. Pour cela, nous avons étudier la structure génétique de cohortes d'huîtres plates au cours d'une saison de reproduction...
Tipo: Text
Palavras-chave: Ostrea edulis; Génétique des Populations; Microsatellites; Diversité génétique; Dynamique de recrutement.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00033/14419/11714.pdf

Caractérisation morphologique et fonctionnelle des hémocytes chez l'huître plate, Ostrea edulis
Provedor de dados: 5
Autores: Xue, Quiggang.
The mechanism that bivalve molluscs react to infectious agents are important research subjects in the fIeld of disease control studies for these animals. While the selection of disease resistant populations have made decisive progression in some species, the mechanism behinds these resistant phenomena is not yet clear so far. However, hemocytes must represent one of the key factors in the reaction process. Based on this hypothesis, the structure and function of European flat oyster, Ostrea edulis, hemocytes have been investigated in aid of different techniques in the present study. ln addition, Pacific oyster, Crassostrea gigas, hemocytes have been analysed in certain aspects so as to provide some results for comparison. European flat oyster and Pacific...
Tipo: Text
Palavras-chave: Bivalvia; Ostrea edulis; Crassostrea gigas; Mécanismes de défense; Hémocytes; Granulocytes; Hyalinocytes; Séparation; Anticorps monoclonaux; Enzymes; Cytométrie de flux; Bivalvia; Ostrea edulis; Crassostrea gigas; Defence mechanisms; Hemocytes; Granulocytes; Hyalinocytes; Separation; Monoclonal antibodies; Enzymes; Flow cytometry.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00107/21820/19406.pdf

L'amélioration des performances de l'huître plate européenne Ostrea edulis par la sélection génétique
Provedor de dados: 5
Autores: Bedier, Edouard; Baud, Jean-pierre; Cochennec, Nathalie; Cornette, Florence; Gerard, Andre; Goyard, Emmanuel; Joly, Jean-pierre; Kopp, Joel; Langlade, Aime; Le Coguic, Yvette; Mazurie, Joseph; Nourry, Max.
The European flat oyster Ostrea edulis has been considered as the traditional French oyster for a very long time and has now nearly disappeared from our farms, as a consequence of the two successive epizootic of the Marteilia refringens parasite and Bonamia ostreae. The actual quasi monoculture of Crassostrea gigas has made necessary the search for a diversification in oyster culture, including the search for a new start of the indigenous flat oyster culture. The Ifremer has been conducting parallel works since 1985 in order to better understand the biology of the parasite as well as to try and select different lines of flat oyster resistant to Bonamia ostreae.
Tipo: Text
Palavras-chave: Bonamia ostrea; Huître plate; Sélection Génétique; Ostrea edulis.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/acte-3274.pdf

Flat oyster follows the apoptosis pathway to defend against the protozoan parasite Bonamia ostreae
Provedor de dados: 5
Autores: Gervais, Ophelie; Chollet, Bruno; Renault, Tristan; Arzul, Isabelle.
The in vitro model Ostrea edulis hemocyte - Bonamia ostreae is interesting to investigate host-parasite interactions at the cellular level. Indeed, this unicellular parasite infects the flat oyster Ostrea edulis and multiplies within hemocytes, the central effectors of oyster defenses. Apoptosis is a mechanism used by many organisms to eliminate infected cells. In order to study the potential involvement of this mechanism in the oyster response to B. ostreae, in vitro experiments were carried out by exposing hemocytes from the naturally susceptible oyster O. edulis and a resistant oyster species Crassostrea gigas to live and heat-inactivated parasites. Hemocyte apoptotic response was measured using a combination of flow cytometry and microscopy analyses....
Tipo: Text
Palavras-chave: Apoptosis; Host-parasite interactions; Parasite; Oyster; Bonamia ostreae; Ostrea edulis.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00346/45692/45312.pdf

Maladie de la glande digestive de l'huître plate
Provedor de dados: 5
Autores: Comps, Michel.
Tipo: Text
Palavras-chave: Ostrea edulis; Etiologie; Prophylaxie et traitement; Histopathologie; Ostrea edulis; Etiology; Control; Histopathology.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00140/25079/23187.pdf

Feeding and digestion with bivalves
Provedor de dados: 5
Autores: Deslous-paoli, Jean-marc.
On the contrary to the U. S. where they represent but 4.6% of the total marine production , mollusc, principally bivalves, can no longer be considered as a marginal production. In France, 100 000 ton of oysters, 98% of which is represented by Crassostrea gigas (Héral &amp; al., 1985) and 85 000 ton of mussels (Mytilus edulis, Mytilus edulis galloprovincialis) (Dardignac, 1985) are produced yeraly. Elsewhere, new rearings are being developed, such as pectinidae and Ruditapes philippinarum, on the Atlantic and Mediterranean coasts. The species presently cultured, some of which dependiing only on natural collections (Crassostrea gigas, Mytilus edulis, Mytilus galloprovincialis while others depend on hatchery production, either partially Crasssotrea gigas in...
Tipo: Text
Palavras-chave: Ruditapes decussatus; Ostrea edulis; Mytilus edulis; Crassostrea gigas; Bivalves; Physiology; Digestion; Feeding.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-7476.pdf

Relance de l'huître plate Ostrea edulis L.. Rapport d'avancement 1987
Provedor de dados: 5
Autores: Ifremer, Equipe Ressources Aquacoles de La Trinité-sur-Mer; Ifremer, Pathologie et Génétique des Invertébrés Marins de La Tremblade.
La situation zoosanitaire reste inchangée en ce qui concerne l'extension des parasitoses, cependant à l'exception de la Baie de Saint-Brieuc, la virulence de Bonamia ostreae a diminuée et a permis de poursuivre les essais d'élevage à Cancale et de reprendre l'élevage en Baie de Quiberon. Des essais réalisés avec le naissain d'écloserie obtenu à partir d'huîtres ayant résisté à la parasitose montre l'acquisition d'une certaine résistance. Les tests seront poursuivis en 1988 et au cours des Prochaines années. Selon les résultats, l'effort de captage pourra être porté sur les zones où cette résistance pourrait être plus marquée. Les travaux sur les modèles menés en pathologie fondamentale ont permis de mettre en évidence chez Crassostrea gigas un facteur de...
Tipo: Text
Palavras-chave: Ostrea edulis; Epidémiologie; Pathologie; Hémocytes; Echantillonnage; Elevage.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00271/38221/36380.pdf

Dix ans de production en ecloserie de mollusques bivalves
Provedor de dados: 5
Autores: Leborgne, Y.
SATMAR has developed techniques and methods allowing a production of over 100 million spat per year at a size from 2 to 10 millimetres. Among the 13 species concerned by this production, 3 of major importance are the oysters Crassostrea gigas, Ostrea edulis and the Japanese little neck clam, Ruditapes philippinarum . The hatchery production could easily be doubled if the market would increase. Current research tend to increase the quality of the products by means of genetics and to lower the costs by improving the nursery phase.
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Ostrea edulis; Crassostrea gigas; Bivalvia; Costs; Marine aquaculture; Economics; Hatcheries; Aquaculture enterprises; Ecloserie; Production commerciale; Mollusques bivalves.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1184.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

A long term study of bonamiosis in Quiberon bay, France
Provedor de dados: 5
Autores: Arzul, Isabelle; Miossec, Laurence; Blanchet, Estelle; Garcia, Celine; Joly, Jean-pierre; Francois, Cyrille; Berthe, Franck.
Bonamiosis was first reported in association with mass mortality of flat oysters, Ostrea edulis, in June 1979 in L'Ile Tudy, Brittany. The disease rapidly spread to all of the oyster farming areas in France but also in other European countries. The French flat oyster production, which already suffered from another protozoan disease, marteiliosis, decreased from 5500 mt in 1979 to less than 2000 mt after 1980. In 2001, about 350 French farms sell 1650 mt of flat oysters. This production mainly relies on natural spat collection which specially occurs in Quiberon bay. One third of this spat is transferred from South to North Brittany for further growth. Quiberon bay constitutes an interesting site regarding the surveillance of bonamiosis because of the...
Tipo: Text
Palavras-chave: Detection; Bonamia ostreae; Protozoan; Diseases; Pathology; Ostrea edulis; Oysters.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3314.pdf

Detection of Bonamia ostreae and B. exitiosa (Haplosporidia) in Ostrea edulis from the Adriatic Sea (Italy)
Provedor de dados: 5
Autores: Nardsi, V.; Arzul, Isabelle; Cargini, D.; Mosca, F.; Calzetta, A.; Traversa, D.; Robert, Maeva; Joly, Jean-pierre; Chollet, Bruno; Renault, Tristan; Tiscar, P. G.
The flat oyster Ostrea edulis L. is widespread along the Italian coasts. In particular, the Manfredonia Gulf (Adriatic Sea) represents an important site where natural beds subsist. Previous monitoring conducted in 1990 by light microscopy and ultrastructural studies revealed the presence of Bonamia-like microcell parasites in some flat oysters: following this observation, a new sampling of O. edulis was carried out at this location in 2007. Of 750 oysters collected, 3 showed the presence of uninucleated microcells (2 to 3 mu m diameter) free or inside the haemocyte cytoplasm by cytology and histopathology. Molecular analysis confirmed that the microcells in 2 oysters were B. exitiosa, whereas in the third oyster the microcells were B. ostreae. Moreover,...
Tipo: Text
Palavras-chave: Bonamia spp.; Ostrea edulis; Molecular analysis; Electron microscopy.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11284/7825.pdf