Consulta: subjectFacets:"Huître"
Registros recuperados: 89
Data/hora: 06/06/2024 02:23:28

Open-air treatment of wastewater from land-based marine fish farms in extensive and intensive systems: current technology and future perspectives
Provedor de dados: 5
Autores: Hussenot, Jerome; Lefebvre, Sébastien; Brossard, Nicolas.
Marine land-based fish farms located in coastal wetlands (salt-pond zones, lagoon banks, etc.), whether extensive or intensive, send farm effluents directly to the sea or after short periods of stocking in retention reservoirs. The aims of our investigation have been to compare the efficiency of current and potential water treatment procedures in open-air. Wastewater retention ponds in commercial farms (Atlantic coasts of France) are efficient in removing up to 1 metric ton of particulate material (dry weight) per hectare and per day (faeces and unconsumed feed), but are inefficient in reducing dissolved wastes, both organic (urea, amino acids, protein) and inorganic (total ammonia nitrogen, phosphates). Forthcoming outdoor technology to treat these forms...
Tipo: Text
Palavras-chave: Traitement de l'eau; Effluent; Décantation; Sédimentation; Écumage; Microalgue; Huître; Water treatment; Effluent; Aquaculture; Sedimentation; Foam fractionation; Microalgae; Oyster.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/1998/publication-873.pdf

Testing of the Argentina oyster, Ostrea puelchana, in several French oyster farming sites
Provedor de dados: 5
Autores: Pascual, Marcela; Martin, Anne-genevieve; Zampatti, Eduardo; Coatanea, Denis; Defossez, Jérôme; Robert, Rene.
Because of diseases affecting fIat oyster Ostrea edulis, acclimatization of the Argentina oyster Ostrea puelchana has been tested in 1989-90 in five French oyster farming sites. Following ICES recommendations , hatchery produced juveniles, from parents imported from Argentina, were transferred to experimental si tes in summer 1989. Very high mortalities occurred, reaching 46 to 98% in March-Apri1 1990. They continued later on, resulting in the end of experiments in March 1991. The growth of surviving oysters was relatively poor in comparison of the local species. Parasites Marteilia refringens and Bonamia ostreae have been detected but at rates inadequate ta explain the high mortalities. AlI these results lead not to retain this species for breeding on...
Tipo: Text
Palavras-chave: Huître; Ostrea puelchana; Parasitologie; Marteilia refringens; Oysters; Ostrea puelchana; Parasitology; Marteilia refringens.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00018/12946/9916.pdf

Déclin du rendement sur les concessions ostréicoles de la zone NE du bassin d'Arcachon
Provedor de dados: 5
Autores: Le Dantec, Jean.
Depuis une dizaine d'années le rendement décline sur les parcs à fond d'argile voisins du littoral entre Arès et Biganos. Les chiffres relevés sur le livre de compte d'un ostréiculteur d'Andernos illustrent ce phénomène.
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Déclin; Croissance; Arcachon; Gironde.
Ano: 1959
URL: http://archimer.ifremer.fr/doc/00004/11494/8060.pdf

Observations relatives à une expérience de reproduction artificielle des huîtres du Pacifique (Crassostrea gigas Thunberg)
Provedor de dados: 5
Autores: Comps, Michel.
The artificial production of oyster spats in Japan and the USA provided inspiration to some French oyster farmers who thought that, at a time when stocking up Crassostrea gigas spats was getting more difficult, it would be interesting to try out the nutrition techniques developed by Japanese and American specialists. In this way, in La Tremblade, in the Marennes basin, M. Paul Jarno set up some structures aimed at artificial oyster reproduction. Trials started in 1968 and continued in July 1969. The first step was to assess the material and structures' usability and to take a closer look at the practical larval nutrition conditions in order to obtain fixed spats. This document is a collection of the observations carried out during the different trials.
Tipo: Text
Palavras-chave: Reproduction artificielle; Larves; Naissain; Reproduction; Crassostrea gigas; Huître.
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-6285.PDF

Préparation des collecteurs - tuiles : un essai de lutte contre la fixation des salissures
Provedor de dados: 5
Autores: Le Dantec, Jean.
Les ostréiculteurs du bassin d'Arcachon utilisent pour la récolte du naissain des tuiles demi-cylindriques d'une surface voisine de 17dm2. Elles sont traditionnellement recouvertes d'un enduit dont la composition est très variable. La "baille à mortier" permet de traiter 1.000 tuiles. Voici deux exemples concrets du mélange utilisé.
Tipo: Text
Palavras-chave: Huître; Reproduction; Collecteur; Tuile; Fixation naissain.
Ano: 1956
URL: http://archimer.ifremer.fr/doc/00004/11477/8036.pdf

Performances de croissance de l'huître creuse, Crassostrea gigas (Thunberg) dans le bassin d'élevage de Marennes-Oléron entre 1979 &amp; 1982
Provedor de dados: 5
Autores: Berthome, Jean-paul; Prou, Jean; Bodoy, Alain.
Growth of the japanese oyster, Crassostrea gigas was monitored during 4 years, by following the recruitment of the year 1978, held in rearing conditions. After three and half years, the average length was la cm and the average total weight was 80 g. Clear seasonal changes were observed on the growth in length and weight.  An  important loss in dry weight occured in July, during the release of gametes. Such losses constituted 29 %, 43 % and 60 % of the dry weight, respectively for individuals which were 2 years, 3 years and 4 years old. The higher instantaneous growth rates  (G) were observed during spring and at the beginning of summer. Growth model of Von Bertalanffy, gave the best estimate for the length growth of the species. During the 1979-1982...
Tipo: Text
Palavras-chave: Growth parameter; Growth model; Reardd stock; Crassostrea gigas; Oyster; Growth; Descripteurs de croissance; Modèle de croissance; Stock cultivé; Crassostrea gigas; Huître; Croissance.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-2967.pdf

Note sur le reparcage des huîtres importées du Portugal en 1955
Provedor de dados: 5
Autores: Ladouce, Rémy; Le Goff,.
Des échantillons des gryphées du Portugal ont été prélevés en Avril-Mai 1955, par les inspecteurs côtiers, au cours de chaque arrivage. Il ont été analysés au laboratoire central de l'Institut des Pêches, pour dosage du cuivre. Nous donnons ci-dessus le tableau récapitulatif des résultats de ces analyses.
Tipo: Text
Palavras-chave: Huître; Grypheae; Dosage cuivre; Croissance; Chambrage; Importation.
Ano: 1956
URL: http://archimer.ifremer.fr/doc/00004/11478/8037.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

Effect of sediment nearness on the metabolic enzyme activity and energy state of the oyster Crassostrea gigas
Provedor de dados: 5
Autores: Le Moullac, Gilles; Fleury, Pierre-gildas; Le Coz, Jean-rene; Moal, Jeanne; Samain, Jean-francois.
This study was designed to assess in situ the effects of sediment nearness on Crassostrea gigas metabolism. One year-old oysters were reared for 5 months (April-August) in plastic bags on metallic frames at 10 and 60 cm off the sediment at the beginning of April. The management of the energetic resources (storage, consumption) was estimated with respect to biochemical changes of proteins, lipids and carbohydrates. In order to evaluate the  effect of the sediment nearness at cellular level, the metabolic rate was evaluated by assessing pyruvate kinase (PK) and phosphoenolpyruvate carboxykinase (PEPCK) enzyme activities and electron transport system (ETS) activity. The metabolic pathways were assessed by measuring ATP and intermediary metabolites such as...
Tipo: Text
Palavras-chave: Aspartate; Succinate; Alanine; ETS; PEPCK; PK; Carbohydrate; Lipids; Proteins; Sediment; Oyster; Aspartate; Succinate; Alanine; ETS; PEPCK; PK; Glucides; Lipides; Proteines; Sédiment; Huître.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2803.pdf

La détection des pontes dans le milieu naturel : application de l'ostréographie à l'étude de la reproduction des huîtres
Provedor de dados: 5
Autores: His, Edouard.
L'activité valvaire particulière qui accompagne la ponte chez les Crassostrea sp. permet de déceler le frai de ces huîtres. La possibilité de contrôler le comportement des mollusques par ostréographie dans le milieu naturel, est mise à profit pour déterminer la date exacte du frai. Les résultats ainsi obtenus renforcent les indications fournies par les données traditionnelles des examens de maturité sexuelle et de numération de larves dans le plancton . Un exemple basé sur les observations réalisées au cours de la saison de reproduction de 1974 dans le bassin d'Arcachon le confirme.
Tipo: Text
Palavras-chave: Ostréographie; Reproduction; Crassostrea gigas; Huître.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/acte-7375.pdf

Mortalité printanière et estivale de l'huître creuse Crassostrea gigas dans le Bassin de Marennes-Oléron (Banc de Ronce-Perquis)
Provedor de dados: 5
Autores: Remoue, Sophie.
Le banc ostréicole de Ronce-Perquis au sud du bassin de Marennes-Oléron (Charente), constitue un site atelier expérimental pour l'étude des mortalités printanière et estivale de l'huître creuse Crassastrea gigas. L'étude d'une durée de 5 mois a été effectuée sur quatre lots d'huîtres captées et élevées sur des bancs ostréicoles différents, puis placés en élevage sur un même site. Le taux de mortalité des élevages d'huîtres à plat (de 22 à 50 %) est supérieure à celle des élevages sur table (inférieure à 15 %). Le lot le plus jeune, Bartleur, qui présente une faible mortalité cumulée, résiste le mieux à la période d'acclimatation des élevages. Après une phase de "rémission" de la mortalité (mi-avril mi-mai), deux épisodes de mortalité apparaissent...
Tipo: Text
Palavras-chave: Huître; Crassostrea gigas; Mortalité; Croissance; Composition biochimique; Marennes-Oléron.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00412/52359/53147.pdf

Taxonomie et virulence de vibrions pathogènes d'huîtres creuses Crassostrea gigas
Provedor de dados: 5
Autores: Le Roux, Frédérique.
As the emergence of new vibriosis in the European Atlantic coasts has been associated with mass mortalities of molluscs cuasing important economic losses, the project obectives are to provide knowledge and operational tools to evaluate the impact of vibriosis on farmed japenese oyster Crassostrea gigas. Facing the diversity of Vibrio species associated to bivalve disease outbreaks, the difficulties of identification and the detemrination of their pathogenic abilities we propose a double approach to correlate phenotype/geneotype of a bacteria with risk of disease : 1) by genotyping we will evaluate if specific strains are associated with disease. 2) by evaluating likely virulence mechanisms implicated in pathogenesis, we will characterise the genes...
Tipo: Text
Palavras-chave: Taxonomie; Marqueur génétique; Pathogène; Génotype; Phénotype; Crassotrea gigas; Huître; Vibrioses; Diagnostique.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/these-3699.pdf

Effet des biodépôts de l'huître Crassostrea gigas (Thunberg) sur l'accumulation de matières organiques dans les parcs du bassin de Marennes-Oléron
Provedor de dados: 5
Autores: Sornin, Jean-marc; Feuillet, Michelle; Heral, Maurice; Deslous-paoli, Jean-marc.
The accumulation of biodeposits brings about geochemical modifications of the underlying sediment, that are noticeable. The increase can reach 83% of the amount of organic carbon. By catching the deposits on the spot and by gathering them directly from the oyster tables we get a daily deposit that can weigh, according to season, between 8 and 99 g of carbon a square meter. The recycling of important quantities of organic matter increase the oxygen needs and the most reducing environment provides opportunities for ammonification and reduction of sulfate into sulfur. So we can consider that there is as much as 4 times more sulfurous hydrogen in intensive oyster-growing areas. This output of sulfurs seems to cause the oyster filtration some damage (Ito et...
Tipo: Text
Palavras-chave: Marennes Oleron; Sediment; Oysters; Physiology; Filtration; Biodeposits; Crassostrea gigas; Marennes Oléron; Sédiment; Huître; Physilogie; Filtration; Biodépôts; Crassostrea gigas.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-2955.pdf

Conséquences génétiques de la production intensive de larves d'huîtres en écloserie : étude des processus de dérive et de sélection liés aux pratiques d'élevage.
Provedor de dados: 5
Autores: Taris, Nicolas.
In order to study the genetic influence of intensive production of the larval stage in commercial hatcheries, two types of specific selective processes were examined: the effects of discarding the smallest larvae and temperature. A mixed-family approach was used in order to infer the genetic composition of the larvae.  The results show that our mixed-family approach, combined with microsatellite-based family assignment, is a powerful tool for the study of bivalve larvae genetics. Selective sieving is an advantageous practice at a phenotypic scale, but also represents a substantial risk for diversity loss. The culled larvae are important for the minimization of the variability in reproductive success and the maximization of broodstock genetic diversity....
Tipo: Text
Palavras-chave: Hatchery; Oyster; Genetic diversity; Selection domestication; Larvae; Crassostrea gigas; Ecloserie; Huître; Diversité génétique; Sélection domestication; Larve; Crassostrea gigas.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/these-976.pdf

Etude de la réponse immunitaire chez l'huître Crassostrea gigas : caractérisation et fonctions de protéines de reconnaissance aux LPS et d'effecteurs antimicrobiens
Provedor de dados: 5
Autores: Gonzalez, Marcelo.
Research on the immune response of oysters is motivated by the problems of infectious diseases potentially found in the farms. Over the course of the last few years, the development of genomic approaches has allowed us to make headway on characterising genes involved in the cup oyster's (Crassostrea gigas) innate immunity, particularly thanks to various programmes for analysing transcriptome, of type EST (Express Sequence Tag) and subtractive banks. Within the context of this work, over the course of which we have used the data from genomic research and we have also developed biochemical approaches, we were particularly interested in studying the proteins involved in reconnaissance reactions to LPS as well as to antimicrobial effectors. In an earlier part,...
Tipo: Text
Palavras-chave: Defense peptides; Polysaccharides; LPS; Hemocytes; Immune response; Crassostrea gigas; Shellfish culture; LPS; Défensine; Peptides antimicrobiens; LBP; BPI; Superoxide dismutase; Hémocytes; Crassostrea gigas; Huître; Mollusque; Immunité.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/these-2098.pdf

Analyse statistique des données de mortalité d’huîtres acquises par l’Observatoire National Conchylicole (RESCO)
Provedor de dados: 5
Autores: Jolivel, Aude; Fleury, Elodie.
This report is based on data which were collected from 2009 to 2011 by the French National Observatory for shellfish culture, in order to describe the mortalities affecting Crassostrea Gigas oyser’s spat since 2008. It aims at studying the appearance dynamic of mortality events in several sites and lots but also at identifying the factors that triggers those events.
Tipo: Text
Palavras-chave: Mortalité; Crassostrea Gigas; Huître; Virus OSHV1; Naissain; Température.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00130/24095/22078.pdf

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

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

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

Infection virale associée à des mortalités chez l'huître Crassostrea gigas Thunberg
Provedor de dados: 5
Autores: Comps, Michel; Bonami, Jean-robert.
Some viral particles close to the lridovirus are described in the cytoplasm of some connective cells in the Japanese oyster Crassostrea gigas. This virus looks similar to the one described in Crassostrea angulata and associated with the mortalities of 1970-1973 and to the one observed in the gill damages in the same species.
Tipo: Text
Palavras-chave: Virus; Mortalité; Pathologie; Crassostrea gigas; Huître.
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/publication-6082.PDF

Les différents systèmes de collecteurs de naissain
Provedor de dados: 5
Autores: Boury, Maurice.
Le naissain est récolté sur des matériaux très variés : pierres, coquilles, bois, tuiles non chaulées, tuiles chaulées. De plus, le même matériel peut être disposé de façons différentes. Exemple : coquilles étalées sur le fond et coquilles assemblées en chapelets et suspendues dans l'eau.
Tipo: Text
Palavras-chave: Huître; Reproduction; Naissain; Collecteur; Recrutement.
Ano: 1929
URL: http://archimer.ifremer.fr/doc/00005/11586/8212.pdf

Aide à l'estimation des stocks d'huîtres en élevage par télédétection basse altitude: étude de faisabilité
Provedor de dados: 5
Autores: De Pontual, Helene.
Existing methods to assess the biomass of reared oyster's stocks are ail based on aerial photographs and field data.  In this study, we propose an automatic processing of the digitized aerial photographs making use of advanced vision tools such as mathematical morphology.  The implemented a1gorithms are described. They give enough convincing results to suggest further developments.  However, this method requires the use of digital images. To this respect, a part of this paper deals with data acquisition problems. We particularly study the feasibility of using airborne video recording system. Such device should give a quite accurate information, easier to process than the classical aerial photographs.
Tipo: Text
Palavras-chave: Huître; Estimation des stocks; Photographie aérienne; Vidéo aéroportée; Analyse d'images numériques; Oysters; Stock assessment; Aerial pholographs; Airborne videography; Digital image processing.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00105/21669/19247.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

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

Le contrôle sanitaire des huîtres, moules et coquillages
Provedor de dados: 5
Autores: Lambert, Louis.
L'eau de mer, l'eau du large, n'est pas stérile, bactériologiquement pure, mais il est reconnu qu'elle ne contient pas de microbes pathogènes à l'homme, en particulier le redoutable bacille d'Eberth ni ses cousins paratyphiques. Il n'en est malheureusement pas de même près des côtes où elle est trop souvent souillée par les écoulements des agglomérations. Cette souillure atteint parfois des gisements naturels sur lesquels vont pêcher innocemment les baigneurs ou moins innocemment certains pêcheurs.
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Contrôle sanitaire; Moules; Coquillages.
Ano: 1949
URL: http://archimer.ifremer.fr/doc/00004/11492/8057.pdf

L'acétylcholinestérase, marqueur de neurotoxicité. Application à la surveillance des effets biologiques des polluants chez les organismes marins
Provedor de dados: 5
Autores: Bocquene, Gilles.
Les cholinestérases et particulièrement l'acétylcholinestérase (AChE) constituent la cible privilégiée de nombreuses molécules neurotoxiques notamment des insecticides organophosphorés (OP) et carbamates. La sensibilité des cholinestérases à ces inhibiteurs est aussi complexe que le polymorphisme de ces enzymes. L'utilisation des niveaux d'activité des cholinestérases comme marqueur d'exposition aux neurotoxiques dans le milieu marin implique donc une connaissance approfondie du polymorphisme de i'enzyme, de Ja sensibilité des formes AChE identifiées et des contaminants neurotoxiques susceptibles de provoquer des variations dans l'activité de cette enzyme chez les organismes marins. Aprés une synthèse des connaissances sur le polymorphisme des...
Tipo: Text
Palavras-chave: Biomarqueur; Cholinestérases; Pollution marine; Huître; Organophosphorés; Carbamates.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00443/55435/56950.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

Evidence of differential chromosome loss in aneuploid karyotypes of the Pacific oyster, Crassostrea gigas
Provedor de dados: 5
Autores: Leitao, Alexandra; Boudry, Pierre; Thiriot Quievreux, Catherine.
The G-banding technique was performed on aneuploid karyotypes from gill tissue of the Pacific oyster, Crassostrea gigas, to assess whether chromosome losses could be explained by differential chromosomal susceptibility and to clarify the negative correlation between aneuploidy and growth rate previously reported in different populations of this oyster. The study of 95 G-banded aneuploid karyotypes showed that only 4 of the 10 chromosome pairs (viz. 1, 5, 9, and 10) of C. gigas were affected by the loss of one homologous chromosome. Pairs 1, 9, and 10, which were lost in 56, 33, and 44% of cases, respectively, may be considered to be differentially affected. Hypotheses on this differential chromosomal susceptibility are discussed.
Tipo: Text
Palavras-chave: Oyster; Karyotype; G banding; Growth; Aneuploidy; Huître; Caryotype; Bandes G; Croissance; Aneuploïdie.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-742.pdf

Relation entre la capacité trophique de l'écosystème "claire ostréicole" et la production de l'huître Crassostrea gigas en période d'affinage
Provedor de dados: 5
Autores: Soletchnik, Patrick; Razet, Daniel; Goulletquer, Philippe; Geairon, Philippe; Le Moine, Olivier; Faury, Nicole.
This study presents an environmental survey o foyster  ponds in Marennes Oléron Bay (France). Physical and biological parameters were recorded in continuous to study this mesocosm (450 m2 surface). The trophic capacity of the water column was assessed and used as an imput signal in the biological model of Crassostrea gigas. Oyster production in earthen-ponds was compared to the biological model results. Simulation was carried out experimental results to investigate temperature and food effect on energetic budget of Crassostrea gigas during summer and winter
Tipo: Text
Palavras-chave: Mesocosm study; Crassostrea gigas; Pond; Oyster rearing; Modèle biologique; Ressource trophique; Affinage; Claires ostréicoles; Crassostrea gigas; Huître.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/acte-3236.pdf

Etude d'un élevage intégré bars-huîtres
Provedor de dados: 5
Autores: Buchet, Vincent; Bluteau, A.
Whatever the hydraulic gestion, an épuration of the fishes sewages is possible with the integrated system studied. The main action is situed in the intermediary pond with a significant decrease of nutrients, especially ammonia, and particulate mineral matters. The oyster's pond have no significant action on nutrients, but their action is real on chlorophyll which become limiting factor in 20% renewal system. One of the effluent, system 1 (renewal 10%) had high suspended matter and low nutrient concentrations. The other (renewal 20%) was poor in supcnded matters (chlorophyll). The system 2 give best oyster's growth, close to traditional nursery performances, with an highest mortality (32%). In the first system, suspended matter concentrations are too high...
Tipo: Text
Palavras-chave: Valorization; Oyster; Pre ongrowing; Seabass; Integrated rearing; Valorisation; Huître; Prégrossissement; Bar; Elevage intégré.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/1996/rapport-1917.pdf

L'ostréiculture dans la région de Marennes - Oléron
Provedor de dados: 5
Autores: Trochon, Pierre.
Cette note a pour but de présenter les divers aspects du plus important centre ostréicole de France. Un court exposé sur la situation, le nombre et la superficie des terrains exploités, sur les gisements naturels, sur les collecteurs utilisés, sur les méthodes de culture de l'huître plate (Ostrea edulis) et de l'huître portugaise (Gryphaea angulata), sur les établissements d'expédition, leur nombre et le tonnage des huîtres acheminées vers la consommation, ainsi que sur les recherches effectuées par le laboratoire de l'Institut Scientifique et Technique des Pêches Maritimes, permettra de prendre contact avec la région et de mesurer les efforts déployés en vue d'utiliser rationnellement toutes les possibilités mises à la disposition de l'ostréiculture,...
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Marennes-Oléron; Charente-Maritime; Elevage.
Ano: 1954
URL: http://archimer.ifremer.fr/doc/00003/11472/8031.pdf

Relations trophiques entre huitre et milieu; influence de la concentration et de la taille des particules
Provedor de dados: 5
Autores: Filia, M; Copello, M; Colomines, J.
At 15 degree C, different concentrations of Phaeodactylum tricornutum are given to Crassostrea gigas . Ingestion, filtration, respiration, ammonia excretion have been measured. All ecophysiological response, except dissolved excretion, are dependent of food concentration. Energy balances have been determined and selectivity of particle size observed.
Tipo: Text
Palavras-chave: Crassostrea gigas; Bivalvia; Phaeodactylum tricornutum; Algae; Diets; Excretion; Respiration; Water filtration; Ingestion; Particle size; Energy balance; Food availability; Ecophysiology; Bilan énergétique; Ecophysiologie; Huître.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1178.pdf

Importance de l'oxygène dissous dans l'eau des bassins ostréicoles
Provedor de dados: 5
Autores: Ladouce, Rémy; Le Dantec, Jean.
On constate souvent, surtout l'été, une mortalité anormale des huîtres dans les bassins, claires, dégorgeoirs ou dépôts, dont l'eau n'est renouvelée qu'à intervalles assez longs. Les ostréiculteurs ont l'habitude d'incriminer uniquement la chaleur, mais les essais de M. BOURY, en 1927, et de l'un de nous, en 19536, montrent qu'en définitive cette mortalité est provoquée, en grande partie, par le manque d'oxygène.
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Oxygène; Bassin ostréicole; Recommandation.
Ano: 1954
URL: http://archimer.ifremer.fr/doc/00003/11470/8029.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

Croissance des huîtres creuses, Crassostrea gigas, en baie du mont Saint-Michel, avant la restructuration de 2004
Provedor de dados: 5
Autores: Bouget, Jean-francois; Mazurie, Joseph.
This study presents the main results of oyster growth obtained experimentally in 2002 and 2003, in the farming area of Cancale before the leases reorganization of 2004. According to the REMORA monitoring network from 1990 to 2004, the oyster growth in Cancale bay may be characterized by an average annual weight gain (around 30g per year), a rather weak meat content compared to other regional oyster sites, and an exceptional quality of shell (absence of blisters, few Poly do rd). Spatially, the oyster farming area of Cancale shows rather homogeneous performances of breeding, in spite of the muddy southern area. In addition an experimental trial in 2003 allowed to evaluate favourably the potential of the new oyster area of Saint-Benoît : in these...
Tipo: Text
Palavras-chave: Mont Saint Michel; Crassostrea gigas; Growth; Breeding; Oyster; Mont Saint Michel; Crassostrea gigas; Croissance; Ostréiculture; Huître.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-1637.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

Développement de marqueurs moléculaires liés à la résistance à la mortalité estivale chez l'huître creuse Crassostrea gigas - Approche QTL
Provedor de dados: 5
Autores: Sauvage, Christopher.
The Pacific oyster Crassostrea gigas is the most cultivated marine species in the world (4.2 million tonnes for a turnover of 3.5 billion US dollars according to the FAO 2005). Flat oyster culture is one of the components of the French economic activity. However, for more than 15 years, farms have had to face some summer mortality episodes (30 %-60 %), that could jeopardize European mollusc culture competitivity. More than the economical importance of C. gigas, which justifies a great research effort, oysters constitute a study model of the complex physiological and genetic basis (i.e. growth, reproduction, and survival) strongly correlated to the oyster's response to different environmental conditions. One of the considered solutions is the selection of...
Tipo: Text
Palavras-chave: Crassostrea gigas; Huître; Microsatellite; SNP (Single Nucleotide Polymorphism); QTL (Quantitative Trait Locus); Phénotype; Génotype; Cartographie; Marqueurs moléculaires; Sélection Génétique; Génétique.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/these-4544.pdf

Déterminisme du recrutement. Séminaire de Nantes, 2-4 juillet 1984
Provedor de dados: 5
Autores: Ifremer.
The causality of recruitment is of paramount importance for the progress of the control of marine living resources, but its study remains technically complax.The aim of the Nantes panel was to evaluate the state of advancement of three running programs on exploited species (sole, scallops and oysters), and to set out the basis of a wider national program of interest for both basic and targeted research.
Tipo: Text
Palavras-chave: Recrutement; Variabilité; Déterminisme; Sole; Coquille St Jacques; Huître; Recruitment; Variability; Causality; Sole; Scallop; Oyster.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00136/24713/22766.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

L'éthoxyrésorufine-o-déethylase, les adduits à l'ADN et les mocronuclei dans les organismes marins. Application à la surveillance des effets biologiques sur les côtes françaises
Provedor de dados: 5
Autores: Burgeot, Thierry.
Three biomarkers [ethoxyresorufm-o-deethylase (EROD), DNA adducts and micronuclei (MN) were studied for biomonitoring applications along French coasts. EROD was developed at an experirnental stage in two pilot sites, Seine Bay and Fos sur Mer, using the dab (Limanda limanda), dragon et (Callionymus lyra), red mullet (Mullus barbatus) and comber (Serranus hepatus) as target species. Higbest EROD activity was observed in the subestuarial part of Seine Bay and at the stations closest to sources of pollution from Cortiou and Fos sur Mer. The suitable number of fish for detection of a significant difference between two EROD activities was deterrnined as a function of sampling variance and a preselected statistical power. A preliminary study on hepatocytes in a...
Tipo: Text
Palavras-chave: Ethoxyrésorufine-o-déethylase; Adduits à l'ADN; Micronuclei; Poisson; Moule; Huître; Biosurveillance; Ethoryresorufin-o-deethylase; DNA adducts; Micronuclei; Fish; Mussel; Oyster; Biomonitoring.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00443/55462/56984.pdf

Avancées récentes sur la reproduction des huîtres
Provedor de dados: 5
Autores: Gerard, Andre.
Historically, the research on mollusc reproduction conducted by the Ifremer aimed at improving mass production in order to support new activities (Japanese clam for example) or to compensate for insufficient natural reproductions (abalone, king scallop). Nowadays, priority has been given to the preservation of natural resources and the optimisation of shellfish culture in order to support activities that are strongly represented by a profession, especially oyster culture. The studies that have been carried out in the field of oyster genetics for about ten years highlighted the limits of our knowledge on reproduction control as well as the high sensitivity of mollusc farms to the multiple assaults of their outside environment. As far as professional...
Tipo: Text
Palavras-chave: Crassostrea gigas; Reproducteur; Sélection génétique; Huître; Reproduction.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/publication-6535.pdf

Le verdissement dans les claires à huîtres et l'évolution corrélative des chlorophylles a et c
Provedor de dados: 5
Autores: Moreau, Jean.
Les claires à huîtres de la région de Marennes- Oléron sont des bassins creusés dans l'argile, périodiquement alimentés par la marée, d'une profondeur de quelques dizaines de centimètres et d'une surface moyenne de quatre ares. Une diatomée Navicula ostrearia Bory s'y développe dans certaines conditions (Moreau, 1968) en produisant un pigment bleu-vert dont la nature bio-chimique fait actuellement l'objet de recherches concertées à la faculté des sciences de Poitiers.
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Verdissement; Claires ostréicoles; Marennes Oléron; Chlorophylle; Navicula ostrearia.
Ano: 1969
URL: http://archimer.ifremer.fr/doc/00008/11974/8677.pdf

Résultats des recherches pratiques depuis 1950 en ostréiculture
Provedor de dados: 5
Autores: Ladouce, Rémy.
Dans cette note, nous vous proposons de rendre compte, aussi brièvement que possible, des résultats pratiques des recherches de l'Office des Pêches concernant notamment la récolte du naissain et l'engraissement des huîtres.
Tipo: Text
Palavras-chave: Reproduction; Naissain; Récolte; Larves; Huître; Utilisation engrais; Ostréiculture.
Ano: 1952
URL: http://archimer.ifremer.fr/doc/00003/11460/8018.pdf

Nutrional inadequacy of Nannochloris atomus and Stichoccocucs bacillaris for the oyster Crassostre gigas (Thunberg) larvae
Provedor de dados: 5
Autores: Robert, Rene.
The evaluation of Nannochloris atomliS and StichoccocllS bacillaris as nutrient sources for oyster larvae has been attempted in the present work. After a study of their grawth and size distributions, these two species were used as food for Crassostrea gigas larvae. Despite praper sizes (2.5 to 20 µm3) the larval development of Crassostrea gigas was poor. Evaluation of ingestion and digestion of both algae, by means of epifluorescence microscopy, on 2 day and 6 day old larvae showed that they were normally ingested but weakly digested. Consequently, their nutritional inadequacy for larval molluscs may be also related to their indigestibility.
Tipo: Text
Palavras-chave: Stichococcus bacillaris; Nannochloris atomus; Larvae; Nutrient sources; Huître; Crassostrea gigas; Nutrition; Stichococcus bacillaris; Nannochloris atomus; Larve; Algue fourrage; Huître; Crassostrea gigas; Nutrition.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/publication-6198.PDF

Caractérisation de la virulence d'une souche de Vibrio aestuarianus, pathogène de l'huître Crassostrea gigas
Provedor de dados: 5
Autores: Labreuche, Yannick.
In France. shellfish production is a traditional. well-established industry. mainly based upon commercial farming of the Pacifie oyster. Crassostrea gigas. Since the 1980's, annual mass mortalities of C. gigas have been reported during summer. Several studies on this subject have demonstrated that these mortality outbreaks resulted from complex interactions between the physiologieal andJor genetic status of the oysters. environmental factors, and one or more infectious agents, among which are bacteria of the genus Vibrio.
Tipo: Text
Palavras-chave: Huître; Crassostrea gigas; Bactéries; Vibrio aestuarlanus; Pathogénicité; Produits extracellulaires; Métalloprotéase; Hémocytes; Interactions hôte/pathogène; Oyster; Crassostrea gigas; Bacteria; Vibrio aestuarianus; Pathogenicity; Extracellular products; Metalloprotease; Hemocytes; Host/pathogen interactions.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00034/14561/11859.pdf

Les risques conchylicoles en Baie de Quiberon. Troisième partie : le risque d’hypoxie pour l’huître creuse Crassostrea gigas. Rapport final du projet Risco 2010-2013
Provedor de dados: 5
Autores: Stanisiere, Jean-yves; Mazurie, Joseph; Bouget, Jean-francois; Langlade, Aime; Gabellec, Raoul; Retho, Michael; Quinsat, Kevin; Leclerc, Emilie; Cugier, Philippe; Dussauze, Morgan; Menesguen, Alain; Dumas, Franck; Gohin, Francis; Augustin, Jean-marie; Ehrhold, Axel; Sinquin, Jean-marc; Goubert, Evelyne; Dreano, Alain.
The project “Risco”, supported by the “Pôle Mer” and funded by the Regional Council of Brittany, deals with specific risks of mortality of oysters, Crassostrea gigas, cultivated on the bottom, in a subtidal bay of South Brittany : the bay of Quiberon (56, France). Massive mortalities of oysters were reported in summer 2006 in this bay, exclusively located in the deep muddy area with a positive gradient eastward. A validated biogeochemical model was applied in order to simulate the dissolved oxygen over 2000-2006 : it revealed several episodes of hypoxia, more or less intense according to years, but with the same spatial distribution. This approach proved 2006 to be the most hypoxic year since 2000. The hypoxia was due to a rare conjunction of 3 factors :...
Tipo: Text
Palavras-chave: Baie Quiberon; Crassostrea gigas; Huître; Mortalité; Croissance; Hypoxie; Oxygène; Modèle; Upwelling; Loire; Vilaine; Quiberon; Crassostrea gigas; Oyster; Mortality; Growth; Hypoxia; Oxygen; Model; DEB; Upwelling; Loire; Vilaine.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00180/29131/27535.pdf

Écologie de la reproduction de l’huître Crassostrea gigas en lagune méditerranéenne
Provedor de dados: 5
Autores: Lagarde, Franck.
The Mediterranean lagoons host many anthropogenic uses including shellfish aquaculture since the beginning of the 20th century. Imported in 1970, the cupped oyster, Crassostrea gigas, has adapted perfectly and has allowed an important development of oyster’s industry until 2008, the year of occurence of spat outbreak related to the emergence of an Ostreid Herpes-virus μvar. The scarcity of spat and the speculation on this product changed regionally cultural practices and the supply of juveniles, with in particular the wish of developing a local activity of spat collection. However the cycle of reproduction of the species and the recruitment of juveniles were poorly known in lagoon environments. In this context, the objective of this thesis is to...
Tipo: Text
Palavras-chave: Huître; Écologie larvaire; Ressource trophique; Connectivité; Recrutement; Lagune côtière; Oyster; Larval ecology; Trophic resource; Connectivity; Recruitment; Coastal lagoon.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00472/58347/60901.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

Endurcissement du naissain d’huîtres creuses, Crassostrea gigas par le niveau d’exondation ou la densité d’élevage : récapitulatif d’essais conduits entre 2004 et 2007 en rivière d’Auray (56), pour réduire les mortalités estivales
Provedor de dados: 5
Autores: Mazurie, Joseph; Bouget, Jean-francois; Langlade, Aime; Claude, Serge.
This report summarizes a list of husbandry experiments conducted between 2004 and 2007 so as to reduce the summer mortalities of the oyster Crassostrea gigas by farming practices. The Japanese technique so‐called “hardening”, based on nursing the young oysters (less than 1 year‐old) in intertidal areas with high air exposure, is tested and adapted. Significant improvements of survival rates (e.g. 60% survival instead of 40% survival rate) have been obtained by transferring the spat only a few month (between march and june‐july) on “high” inter‐tidal farming plots (up to 40% of mean air exposure time). In such conditions, growth is transiently reduced, but a compensatory growth seems to happen when oysters are transferred back on low concessions. Another...
Tipo: Text
Palavras-chave: Huître; Crassostrea gigas; Mortalité; Endurcissement; Exondation; Densité; Oyster; Crassostrea gigas; Mortality; Hardening; Air exposure; Density.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00042/15350/12705.pdf

Ecophysiological study on the Pacific oyster Crassostrea gigas naturally infected by a Chlamydia-like microorganism : effect of infection level and diet on oyster physiological responses
Provedor de dados: 5
Autores: Soletchnik, Patrick; Goulletquer, Philippe; Cochennec, Nathalie; Renault, Tristan; Geairon, Philippe.
A population of Pacific ovsters, Crassostrea gigas, infected with a Chlamydia-like procaryote was reared to compare infection trends under three different feeding conditions: a starved condition, an  intermediate condition with a diet of Skeletonema costatllm, and a mixed algal diet. Several physiological and pathological criteriJ: presence of gill abnormality; microscopic examination, basophilic intracytoplasmic inclusions, Feulgen reaction; condition index, filtration, food consumptiQn; fecal production and respiration were used to compare the various modalities one month after the initiation of the experiment. The Irodality of starved oysters showed reduce physiological performances in terms of scope for growth and condition index compared to oysters...
Tipo: Text
Palavras-chave: Pathogen; Chlamydia; Procaryote; Crassostrea gigas; Oyster; Ecophysiology; Pathogène; Chlamydia; Procaryote; Crassostrea gigas; Huître; Ecophysiologie.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/publication-2741.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

Anomalies branchiales chez Crassostrea gigas (Thunberg)
Provedor de dados: 5
Autores: Comps, Michel.
A la suite de contrôles effectués à l'arrivée en France de Crassostrea gigas importées du Japon, de Corée et de Colombie Britannique, Marteil (1968) signalait chez ces huîtres la présence au niveau des branchies de lésions identiques à celles observées chez Crassostrea angulata Lmk. présentant les symptômes de la maladie des branchies décrite par L. Arvy et A. Franc (1968).
Tipo: Text
Palavras-chave: Huître; Crassostrea gigas; Pathologie; Maladie; Branchie.
Ano: 1969
URL: http://archimer.ifremer.fr/doc/00008/11971/8676.pdf

Action d'un sel organo-métallique, l'acétate de tributyle-étain sur les oeufs et les larves D de Crassostrea gigas (Thunberg)
Provedor de dados: 5
Autores: His, Edouard; Robert, Rene.
L'action de l'acétate de tributyle-étain, à des concentrations variant de 5 à 100 micro- grammes/l a été étudiée sur les oeufs de Crassostrea gigas en cours de fécondation. Parallèlement les mêmes concentrations ont été testées sur les larves D âgées de 24 heures.
Tipo: Text
Palavras-chave: Huître; Crassostrea gigas; Expérimentation; Larves; Reproduction; Sel organo-métallique; Acétate de tributyle étain.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00009/11983/8687.pdf

Du concept de santé à la détermination d’intervalles de référence chez l’huître creuse Crassostrea gigas
Provedor de dados: 5
Autores: Francois, Cyrille.
Of interest of everyone, health is not an easy concept to figure out. Although there is no universal definition of health, its various uses and meanings allow us to specify its biological, psychic and social dimensions. In animal health, the biological dimension remains the most studied, there is therefore no consensual definition of international animal health. So how to understand the health of marine shellfish? A living being can be functionally described in physiopathology by monitoring biomarkers under laboratory conditions. In men and many animals, "normal" biomarker values have been proposed; these have been determined by carrying out measurements or observations in samples of healthy populations, the rigorous selection of these populations and...
Tipo: Text
Palavras-chave: Santé; Huître; Valeurs de référence; Filtration; Consommation d’oxygène; Health; Oyster; Reference values; Clearance rate; Oxygen consumption rate.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00610/72189/70970.pdf

Approche des relations entre  a croissance de l'huître Crassostrea  gigas et le milieu dans le bassin d'Arcachon
Provedor de dados: 5
Autores: Maurer, Daniele.
study of the experimental growth of the oyster Crassostrea gigas was undertaken of 1985 to 1988, parallel to a follow-up hydrobiologic of the medium, in three sites of the basin of Arcachon. - The characteristics of growth of the studied sites proved very stable during various years ; they are also very different from one site to another, the performances being able to vary the simple one with the double of the center of the basin towards the exit on the ocean. It is during the summer and of the autumn that the difference is established between the sectors, the spring growths being similar. The hierarchy observed is associated a more or less great precocity of the laying. - A gradient influences continental oceanic-influence is observed, resulting in more...
Tipo: Text
Palavras-chave: Ostreiculture; Oyster; Hydrobiology; Growth; Bay of Arcachon; Crassostrea gigas; Ostréiculture; Huître; Hydrobiologie; Croissance; Baie d'Arcachon; Crassostrea gigas.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/rapport-1645.pdf

Observations complémentaires sur la nature du cycle sexuel de Gryphaea angulata Lmk dans le bassin d'Arcachon
Provedor de dados: 5
Autores: Le Dantec, Jean.
Les premiers résultats de nos recherches ont été exposés dans une communication au Conseil International pour l'Exploration de la Mer en 1957. Ils pouvaient être ainsi résumés : Le cycle sexuel semble être moins long pour les huîtres cultivées sur parcs que pour celles fixées naturellement sur pieux. Un même animal est vraisemblablement capable de pondre au moins deux fois pendant les mois d'été. Le volume de gonade diminue progressivement, ce qui rend malaisée la distinction des stades macroscopiques permettant une étude statistique. La taille des ovocytes diminue également pendant la saison; un nouveau matériel apparaît puis évolué (phénomènes de reconstitution permettant de prévoir des émissions tardives).
Tipo: Text
Palavras-chave: Huître; Grypheae angulata; Reproduction; Bassin Arcachon; Gironde.
Ano: 1959
URL: http://archimer.ifremer.fr/doc/00004/11499/8069.pdf

Taxonomie de l'huître naine Ostreola stentina
Provedor de dados: 5
Autores: Lapegue, Sylvie; Ben Salah, Inès; Batista, Frederico; Heurtebise, Serge; Neifar, Lassad; Boudry, Pierre.
Despite the economic importance of numerous oyster species throughout the world, our knowledge of their systematics and phylogeography remains fragmentary. In Europe, the indigenous species, Ostrea edulis, suffered overexploitation as well as two successive parasitosis over the last century. However, this species is still cultivated in Europe, and especially in Spain and France. Its distribution area stretches from the Atlantic coasts of Europe to the north of Africa as well as around the Mediterranean and Black Sea. Its Mediterranean and South Atlantic distribution area is shared with another indigenous species, the dwarf oyster, Ostreola stentina. Its very small adult size (a few centimetres) makes its culture pointless from a commercial point of view....
Tipo: Text
Palavras-chave: Ostreola stentina; Oyster; Taxonomy; Ostreola stentina; Huître; Taxonomie.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/acte-3364.pdf

Introduction de l'huître creuse Crassostrea gigas en France
Provedor de dados: 5
Autores: Grizel, Henri.
La production d'huîtres creuses françaises est actuellement supérieure à 100 000 tonnes. Elle est assurée par la culture d'une seule espèce, Crassostrea gigas, élevée dans la plupart des centres ostréicoles. Cette espèce s'est avérée résistante aux différentes maladies qui ont affecté tout d'abord l'huître creuse, Crassostrea angulata (Viroses), puis l'huître plate Ostrea edulis (Marteilia refringens et Bonamia ostreae). Ainsi, malgré toutes les controverses que cette implantation a provoquées, le fait essentiel est que depuis 1970-1971, la profession ostréicole a pu rester active, grâce à la culture de C. gigas, et ce, malgré les nombreux problèmes auquels elle a du faire face.
Tipo: Text
Palavras-chave: France; Introduction; Crassostrea gigas; Huître.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-7379.pdf

Rôle fonctionnel des protistes hétéro/mixotrophes dans le réseau trophique d'un écosystème conchylicole: le marais atlantique
Provedor de dados: 5
Autores: Dupuy, Christine.
L'huître Crassostrea gigas se nourrit en filtrant le phytoplancton, mais dans les marais atlantiques, cette production phytoplanctonique ne suffit pas pour équilibrer son bilan énergétique. L'analyse du réseau microbien planctonique au cours de l'isolement du marais en mortes-eaux montre une succession de peuplements : des diatomées qui épuisent rapidement les nutriments, puis des bactéries et enfin des protistes flagellés et ciliés. La production bactérienne représente une ressource énergétique importante, mais l'huître ne peut capter efficacement ces particules &lt; 1 µm. Les protistes hétéro/mixotrophes qui se nourrissent de ces picoproies pourraient alors, s' ils sont retenus par l'huître, représenter un "relais trophique" entre la production...
Tipo: Text
Palavras-chave: Huître; Ressources trophiques; Réseau microbien; Protistes; Lien trophique; Marais maritime.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00439/55103/56549.pdf

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

Réseau de suivi de la croissance de l'huître creuse en Bretagne. Synthèse des quatre années 1989 à 1992
Provedor de dados: 5
Autores: Littaye-mariette, Anne; Mazurie, Joseph.
Since 1989, an homogeneous Crassostrea gigas oyster stock has been distributed once a year on several rearing sites in Brittany (3 populations per site). The main quantitative and qualitative growth descriptors, which reflect water quality effects during the monitoring period, are estimated at the end of each year. The 1989-1992 analysis prompted us to describe various growth responses correlated to biotops: oyster production in open areas influenced by oceanic waters was fairly constant in quality, including size and Polydora sp. infestation. In contrast, oysters in estuarine areas, partly affected by eutrophication (e.g., Aber Benoît, Pen Bé), or with a low carrying capacity, were characterized by weight and Polydora sp. infestation heterogeneity. These...
Tipo: Text
Palavras-chave: Polydora; Condition Index; Mortality; Growth; Monitoring; Oyster; Crassostrea gigas; Brittany; Polydora; Indice de condition; Mortalité; Croissance; Réseau; Huître; Crassostrea gigas; Bretagne.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/rapport-1639.pdf

Effet du CHANGEMENT GLOBAL sur la BIOLOGIE de l’huître creuse (C. gigas) dans le Bassin de Marennes-Oléron. Résultats, hypothèses et discussion
Provedor de dados: 5
Autores: Soletchnik, Patrick; Polsenaere, Pierre; Le Moine, Olivier.
Historiquement, les pêches de larves de l’huître creuse (C. gigas) ont lieu en six stations du BMO depuis les années 70, de début juin à la première semaine de septembre. La comparaison des captures saisonnières et hebdomadaires entre les périodes P1 (1977-1991) et P2 (2000-2015) montre un ajustement de la distribution des captures de larves à un modèle polynomiale d’ordre 4 pour P1 (R2 = 0,77), puis d’ordre 2 pour P2 (R2 = 0,86). Les modèles de distribution des captures montrent que la saison de reproduction a doublé entre les deux périodes. Elle s’étend aujourd’hui de juin à septembre. Devant l’extension de la saison de reproduction, la saison de pêche expérimentale est aujourd’hui trop réduite. Toutefois, le pic d’abondance des captures n’a pas changé...
Tipo: Text
Palavras-chave: Huître; C. gigas; Changement global; Réchauffement climatique; Reproduction; Larve; Mortalité; Phénologie; Ostréiculture; Bassin de Marennes Oléron; Phytoplancton; Chlorophylle a; Température.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00441/55239/56723.pdf

Les besoins écophysiologiques des larves d'huitres creuse Crassostrea gigas en conditions contrôlees : effet de la température, de la nourriture et modélisation de la croissance
Provedor de dados: 5
Autores: Rico Villa, Benjamin.
Nowadays, spat production of Pacific oyster Crassostrea gigas relies on rearing techniques under controlled conditions in hatchery. In this context, an extensive research in aquaculture is necessary because larval development and metamorphosis are critical for hatchery management. Firstly, a diet consisted in a Haptophyceae: Isochrysis affinis galbana (clone T-ISO) and a Bacillariophyceae: Chaetoceros calcitrans forma pumilum demonstrated its efficiency to supply the nutritional needs throughout the whole larval rearing. Then, a flow-through rearing system was developed and coupled with a continuous hydrobiological data recorder to provide basic information for ecophysiology research through different trophic levels and/or temperature throughout larval...
Tipo: Text
Palavras-chave: Crassostrea gigas; Larve; Huître; Croissance; Ecophysiologie; Microalgues; Température; Système d’élevage; Modélisation; Crassostrea gigas; Larvae; Oyster; Growth; Ecophysiology; Microalgae; Temperature; Rearing System; Modelling.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00012/12308/9102.pdf

La reproduction de Crassostrea gigas Thunberg dans le bassin d'Arcachon: bilan de deux années d'observations
Provedor de dados: 5
Autores: His, Edouard.
A la suite des mortalités massives qui avaient affecté la population de C. angulata Lmk dès le premier trimestre 1971 dans le bassin d'Arcachon, la décision fut prise de renforcer rapidement le stock des géniteurs de C. gigas, susceptible d'assurer dès l'été une récolte de naissains et de permettre dans l'avenir une reconstitution des gisements naturels anéantis. En effet la présence sur les collecteurs immergés au cours de l'été 1970 de quelques sujets de l'espèce nouvellement introduite prouvait la possibilité pour les huîtres japonaises de se reproduire dans nos eaux.
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Crassostrea gigas; Reproduction; Croissance; Bassin Arcachon; Gironde.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/00009/11981/8685.pdf

Introduction into France of the Japanese oyster (Crassostrea gigas)
Provedor de dados: 5
Autores: Grizel, Henri; Heral, Maurice.
The Japanese oyster (Crassostrea gigas) has been introduced in France on a large scale to replace cultivation of the Portuguese oyster (Crassostrea angulata), affected by a viral disease. The importation took place from 1971 to 1975, with broodstock coming from British Columbia (Canada) and spat from Japan. Good growth rate and success of the natural setting on the French Atlantic coast attested to the success of this implantation, with a production which reached 80000 t by 1976. The precautionary measures associated with this transfer Iimited the implantation of an introduced fauna, 15 years after, to: Balanus amphitrite, Aiptasia pulchella and, on the Mediterranean coast, Undaria pinnatifida and Laminaria japonica. The authors also discuss the possible...
Tipo: Text
Palavras-chave: Crassostrea gigas; Oyster; Introduction; Crassostrea gigas; Huître; Introduction.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/publication-2760.PDF

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

Etude et modélisation de la dynamique des populations de bivalves en élevage (Crassostrea gigas et Mytilus galloprovincialis) dans le bassin de Thau (Méditerranée, France) et des ascidies solitaires associées
Provedor de dados: 5
Autores: Gangnery, Aline.
The total standing stock of bivalves cultured in Thau Lagoon (France) that is mainly constituted of the Pacific oyster, Crassostrea gigas, and the Mediterranean mussel, Mytilus galloprovincialis, vary between 14,000 and 20,000 tons within a year. These variations were attributed to the rearing cycle of molluscs in the lagoon but also to their growth performances. Oysters cultured in the Thau Lagoon presented the best growth rate ever reported whereas trophic conditions are low : mean concentrations in organic particulate matter and total chlorophyll a averaged 1 mg.l-1 and 1.2 µg.l-1, respectively. The development of a growth model shows that temporal pattern (i.e. seasonality) of bivalve growth is explained by water temperature and spatial pattern is...
Tipo: Text
Palavras-chave: Lagoon ecosystem; Resource management; Rearing strategies; Production; Standing stock; Hydrobiology; Growth; Shellfish culture; Ascidiella aspersa; Mussel; Oyster; Ecosystème lagunaire; Gestion des ressources; Stratégies d'élevage; Production; Stock; Hydrobiologie; Croissance; Conchyliculture; Ascidiella aspersa; Moule; Huître.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/these-102.pdf

L'huître et le contrôle sanitaire ostréicole
Provedor de dados: 5
Autores: Lambert, Louis.
Les mollusques et en particulier les huîtres ont de tout temps joué un rôle considérable dans l’alimentation humaine. Divers auteurs latins, d'autres, plus nombreux, du moyen âge, ont dit les mérites de nos huîtres indigènes qui paraient les tables les mieux servies. Pour les habitants de nos rivages les coquillages ont toujours été nourriture courante, mais la difficulté la longueur des transports ne permettaient pas de les expédier bien loin des côtes. L'exploitation des gisements naturels était la principale industrie, de nombreux auteurs disent la seule, mais à tort, car, dès le XIIIe siècle, la culture de la moule était pratiquée sur nos côtes du Centre Ouest ; un peu partout, les pêcheurs savaient installer des parcs sur les terrains baignés par la...
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Anatomie; Reproduction; Historique; Etablissement Ostréicole; Contrôle sanitaire.
Ano: 1936
URL: http://archimer.ifremer.fr/doc/00003/11463/8023.pdf

Experimental evidence for a genetic basis to differences in aneuploidy in the Pacific oyster (Crassostrea gigas)
Provedor de dados: 5
Autores: Leitao, Alexandra; Boudry, Pierre; Mccombie, Helen; Gerard, Andre; Thiriot-quievreux, Catherine.
Aneuploidy has been previously reported in wild and cultivated Pacific oysters, Crassostrea gigas, and has been shown to be negatively correlated with growth. This is especially important since high variability of growth rate is one of the major problems in the aquacultural production of this species. The existence of a genetic basis for the observed differences in aneuploidy was first investigated through the comparative study of six full-sib families, with mean individual weights ranging from 0.59 to 1.49 g. The slowest growing family was found to have the highest level of aneuploidy. Significant differences in aneuploidy were also found among families when individuals with the same growth rate were sampled. This supports the hypothesis of the existence...
Tipo: Text
Palavras-chave: Oyster; Growth; Genetics; Full sib families; Crassostrea gigas; Aneuploidy; Huître; Croissance; Génétique; Famille de plein frères; Crassostrea gigas; Aneuploïdie.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/2001/publication-2700.pdf

Exploitation des huîtres en Nouvelle Calédonie échantillonnage des stocks naturels d'huîtres de paletuviers (Saccostrea cucullata) et aménagement des pêches
Provedor de dados: 5
Autores: Bodoy, Alain; Morin, Jocelyne.
We analysed a few aspects of oyster culture in New Caledonia. Oyster culture there is not very important, one farm producing 30 tonnes of Japanese oysters per year and the other one, 3 tonnes of rock oysters. Mangrove oyster deposits are traditionally exploited, and this exploitation lead to a decrease of the densities and biomasses observed in the most exploited estuaries. On the four monitored sites, the maximum size observed is comprised between 7.2 to 10 cm, for a mode comprised between 3.6 and 4.8 cm. Densities go from 31 to 251 oysters and biomasses, from 0.751 to 2.553 kg/m2. Regulations focus on the minimum collection size (6 cm) and a fishing prohibition period of 8 months. Based on our observations, we suggest that these dispositions be...
Tipo: Text
Palavras-chave: Aménagement des Pêches; Stocks; Echantillonnage; Huître; Mangrove.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/acte-6527.pdf

Traitement à haute température des huîtres infectées par l’ostreid herpesvirus 1 (OsHV-1). TEMPO - Rapport 2016
Provedor de dados: 5
Autores: Pernet, Fabrice.
Le naissain d’huître creuse Crassostrea gigas est touché chaque année depuis 2008 par des mortalités causées par un microvariant de l’ostreid herpesvirus 1 (OsHV-1 μVar). Plusieurs études montrent que ces évènements de mortalité se produisent préférentiellement lorsque la température de l’eau est comprise entre 16°C et 24°C. Par conséquent, une exposition rapide des huîtres infectées par OsHV-1 à des températures supérieures à 24°C pourrait limiter les mortalités causées par le virus. Il est proposé de (1) vérifier l’hypothèse selon laquelle l’exposition à haute température réduit la mortalité des huîtres infectées par OsHV-1, et (2) déterminer si les animaux qui ont survécu suite à l’infection par OsHV-1 et au traitement thermique sont...
Tipo: Text
Palavras-chave: Epidémiologie; Huître; OsHV-1; Risque; Survie; Température; Epidemiology; Oysters; OsHV-1; Risk; Survival; Temperature.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00434/54574/55953.pdf

Ecophysiologie de la maturation sexuelle et de la ponte de l'huître creuse Crassostrea gigas : réponses métaboliques (respiration) et alimentaires (filtration, absorption) en fonction des différents stades de maturation
Provedor de dados: 5
Autores: Soletchnik, Patrick; Razet, Daniel; Geairon, Philippe; Faury, Nicole; Goulletquer, Philippe.
The study of maturation and spawning of the oyster is part of a research program to investigate the summer mortalities of the oysters, Crassostrea gigas in Marennes-Oléron Bay. Four maturity stages were simultaneously obtained by diet and thermal conditioning (immature, low maturation, mature and post-spawning stages). Measurements of clearance, filtration, absorption and respiration rates allowed a calculation of the scope for growth and hence an estimation of the oyster's energetic budget at various maturity stages. Male and female oysters had similar physiological responses. The filtration rate ranged from 2.4 to 2.6 1.h(-1) at the early stages of maturation and decreased to 1.8 1.h.' during the maturity stage. Growth rate resulting from gonad...
Tipo: Text
Palavras-chave: Huître; Crassostrea gigas; Conditionnement; Maturation; Filtration; Absorption; Respiration; Oyster; Crassostrea gigas; Conditioning; Maturation; Filtration; Absorption and respiration rates.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/1997/publication-3090.pdf

Etude de la structure des communautés bactériennes du sédiment et de l'écologie de Vibrio aestuarianus pathogène de l'huître creuse Crassostrea gigas dans deux sites ostréicoles
Provedor de dados: 5
Autores: Azandegbe, Afi.
Since several years, the French oyster farming copes with high mortality affecting juveniles and some adults of the Pacific oyster Crassostrea gigas. Studies conducted in the framework of a multidisciplinary project (MOREST) showed that mortality was related to several factors like physiological and genetic status of oyster, pathogens including bacteria of the genus Vibrio, and revealed that the sediment, on which the oyster cages are installed, might play a particular role. This has been suggested because of the concomitance of the mortalities and increased toxic compounds like ammonia and sulphides in the sediment. Moreover, the presence of Vibrio bacteria in the sediment indicates a dual role of sediment in the mortality onset. The physico-chemical...
Tipo: Text
Palavras-chave: Huître; Crassostrea gigas; Bactéries; Vibrio aestuarianus; Écologie; Sédiment; Ammonium; Sulfures; Oyster; Crassostrea gigas; Bacteria; Vibrio aestuarianus; Ecology; Sediment; Ammonia; Sulphide.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00032/14277/11561.pdf

Apport de la génétique pour une meilleure connaissance des populations naturelles et une amélioration des populations cultivées d'huîtres plates et creuses
Provedor de dados: 5
Autores: Lapegue, Sylvie.
In the framework of the French diploma "Habilitation à Diriger des Recherches", Sylvie Lapègue's synthesis of research includes ten years (1998-2007) of work in bivalve genetics, and mainly cupped and flat oysters. This research has been developed in (1) flat oyster population genetics at the European level and cupped oyster populations and species genetics at a global scale, (2) the characterization of a cytogenetic particularity observed in oysters that corresponds to a high rate of aneuploidy in somatic cells, and (3) more recently in the use of molecular markers for the construction or improvement of genetic maps, allowing (4) the identification of areas of the genome related to the resistance to summer mortality in the Pacific oyster and the...
Tipo: Text
Palavras-chave: Ostrea; Crassostrea; Oysters; QTLs; Genetic maps; Breeding; Aneuploidy; Population genetics; Ostrea; Crassostrea; Huître; QTLs; Cartes génétiques; Amélioration; Aneuploïdie; Génétique des populations.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-3478.pdf

HLIN - Huîtres du Littoral Normand - Suivi de la colonisation et du recrutement des huîtres sauvages sur le littoral normand - Etat des travaux 2011-2013
Provedor de dados: 5
Autores: Pien, Sebastien; Maheux, Franck; Gauquelin, Thibaut; Le Gendre, Romain.
Sur plusieurs points du littoral français, les bancs sauvages d'huîtres creuses Crassostrea gigas se développent depuis une trentaine d'années. et cette colonisation a tendance à se développer vers le nord, conséquence probable du réchauffement climatique. Si la Normandie est encore très peu touchée par ce phénomène, il semble toutefois opportun de suivre l'évolution de cette colonisation dans les années à venir et apprécier les conséquences futures de cette colonisation sur l'économie ostréicole normande. Après une étude effectuée par l'intermédiaire d'un stage en 2010, la période 2011-2013 a permis de mettre en œuvre et d'améliorer les propositions de protocole émis lors des travaux de 2010. De plus, certains points particuliers, comme l'origine du...
Tipo: Text
Palavras-chave: Huître; Colonisation; Hydrodynamisme; Crassotrea gigas; Espèce invasive.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00191/30258/28701.pdf

La Bonamiose, maladie de l'huître plate
Provedor de dados: 5
Autores: Tendel, Fabienne.
Depuis une dizaine d'années, des mortalités massives dues au protozoaire parasite Bonamia ostreae affectent la production de l'huître plate Ostrea edulis. Dans un premier temps, l'étude de la maladie s'est essentiellement bornée à une description du parasite, de· l'anatomopathologie de l'infection et de l'épidémiologie. Les chercheurs s'orientent maintenant vers des études expérimentales visant à élucider le mécanisme d'action du parasite, en s'inspirant de modèles rencontrés chez les vertébrés.
Tipo: Text
Palavras-chave: Boniose; Bonamia ostreae; Huître; Huître plate; Relation Hote-parasite; Maladie.
Ano: 1989
URL: https://archimer.ifremer.fr/doc/00470/58208/60710.pdf

Etude comparative en cytométrie en flux des fonctions estérases et du métabolisme oxydatif d'hémocytes d'huîtres saines, parasitées, sensibles et résistantes au protozoaire Bonamia ostrea
Provedor de dados: 5
Autores: Cochennec, Nathalie; Garcia, Sandrine; Bedier, Edouard.
In order to fight Bonamiosis, the applicable means are very limited and mostly based on a quick and precocious diagnostic aimed at avoiding the propagation of the disease and a rise in the "resistance" through genetic selection. Various works are conducted in order to understand the oysters' defence mechanisms against this parasite, and then to develop new prophylaxis and fighting methods. In our laboratory, we focus on cellular compartments, the circulating haemocytes, in which B. ostreae multiplies, and their interaction with the parasite.
Tipo: Text
Palavras-chave: Protozoaire; Huître; Hémocytes; Cytométrie en flux; Bonamia ostreae; Biologie cellulaire.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/acte-3275.pdf

Mortalité de Crassostrea gigas dans le bassin de Marennes Oléron. Etude physico chimique du sédiment. Etude du modèle de mortalité "plat-table" de C. gigas dans le bassin de Marennes Oléron. Etude "Dynamo" du projet MOREST
Provedor de dados: 5
Autores: Soletchnik, Patrick; Bouchet, Vincent; Malestroit, Pascal; Seugnet, Jean-luc; Blouin, Frederic; Radford-knoery, Joël; Burgeot, Thierry; Sauriau, Pierre-guy.
In the scope of the study of the "on-bottom/off-bottom" mortality model in the south of the Marennes Oléron Bay, the result of the 2003 multidisciplinary study (Dynamor) appears to be the hypothesis of an acute stress, "ultimate" trigger of the mortality episodes in June. In 2004 we aim to look for the nature of this stress through the physico-chemical analysis of the sediment (Eh, pH, sulphides and ammoniacal nitrogen), the organic matter and chlorophyll load on the surface of the sediment between April and July. Herbicides are also measured in the water column, south of the bay (Seudre), during the same period. A "precocious" (around the first week of June) and "weak" (lower mortality rate on this working site since 1997) mortality peak happens when the...
Tipo: Text
Palavras-chave: Bassin Marennes Oléron; Phytobenthos; Mortalité; Crassostrea gigas; Foraminiferes benthiques; Répartition verticale; Sédiment; Huître; Echantillonnage.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-3383.pdf

Observations sur la reproduction des huîtres dans la Seudre (Bassin de Marennes-Oléron) en 1972
Provedor de dados: 5
Autores: Le Borgne, Annick; Gras, Paul; Comps, Michel; Razet, Daniel.
Après la mortalité massive de 19701-71 qui entraîna la quasi-disparition de l'huître portugaise (Crassostrea angulata), on assite depuis trois ans à l'extension de la culture de l'huître du Pacifique (Crassostrea gigas) dans le bassin de Marennes-Oléron. Cette espèces introduite en fait depuis 1966 montra durant la période de mortalité massive une vigueur et une résistance exceptionnelles, comparativement à l'huître portugaise.
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Crassostrea gigas; Reproduction; Bassin Marennes Oléron; Charente-Maritime.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/00009/12006/8698.pdf

Déterminismes génétiques de l'allocation à la reproduction chez les huîtres creuses (Crassostrea gigas) triploïdes
Provedor de dados: 5
Autores: Normand, Julien.
In diploid Pacific oyster Crassostrea gigas, gonadic development can be important in terms of energetic investment. Phenotypic and genetic negative correlations have also been observed between gonadic occupation and traits related to survival and growth, and this fact suggests that this trait could be deleterious for its aquaculture production. Triploidy can be been artificially induced to improve the production of Pacific oysters as it results in a general diminution of mean gonadic development. This trait is however highly variable. In this context, this study aimed to quantify and qualify the allocation to reproduction in triploid oysters and to study its genetic bases. Variability for allocation to reproduction and growth was first studied in 3 sets of...
Tipo: Text
Palavras-chave: Triploidy x genetic interaction; Genetic determinism; Sexual dimorphism; Gametogenesis; Allocation to reproduction; Triploid; Oyster; Interaction triploïdie x génétique; Déterminisme génétique; Dimorphisme sexuel; Gamétogenèse; Allocation à la reproduction; Triploïde; Huître.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/these-6971.PDF

Essais d'amélioration de la qualité des huîtres creuses, Crassostrea gigas, en milieu naturel (claires)
Provedor de dados: 5
Autores: Gras, Marie-paule; Gras, Paul.
Depuis l'extension de la culture de Crassostrea gigas, la qualité de ces huîtres creuses apparaît très variable au moment de leur commercialisation en fin d'année. En vue d'essayer d'améliorer la qualité de ces bivalves, nous nous sommes efforcés de comparer simultanément l'influence de différents apports nutritifs sur des huîtres provenant d'un lot homogène, mises à l'affinage en claires : bassins creusés dans des terrains plats et argileux, dont l'alimentation en eau de mer se fait à certains coefficients de marée. Les anciens marais-salants de la région de Marennes-Oléron, aujourd'hui presque tous désaffectés, ont été pour la plupart transformés en claires à huîtres
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Crassostrea gigas; Physiologie; Nutrition; Claire ostréicole; Marennes Oléron; Charente-Maritime.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/00009/12008/8700.pdf

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

Bilan des connaissance et des enjeux relatifs aux ressources marines de l'estuaire de l'Odet
Provedor de dados: 5
Autores: Billy, Stéphany; Peronnet, Isabelle.
The estuary of the Odet, which can be defined as a ria, is an integral part of SAGE, taken on by SIVALODET. This space was hardly studied and it seemed important to perform a full assessment of knowledge and issues relating to this ria's fragile and unstable ecosystem. This assessment must be performed according to several points of focus; it must first of all strive to retrace the history of the fisheries in the Odet, then make it possible to identify as clearly as possible the marine habitats that make up this site. With that, it must then bring to light the potential resources of the estuary and finally resituate the Odet in relation to the other Breton estuaries.
Tipo: Text
Palavras-chave: Water quality; Shellfish farming; Parasite; Oysters; Bonamia ostrea; Marteilia refringens; Odet estuary; Brittany; Parasite; Huître; Qualité de l'eau; Habitats de l'Odet; Nourriceries de l'Odet; Marteilia refringens; Bonamia ostrea; Réglementation de la pêche; Estuaire de l'Odet; Bretagne.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2334.pdf

L'oeuvre de JEAN COSTE et le développement de l'ostréiculture
Provedor de dados: 5
Autores: Boury, Maurice.
Il y a un siècle, le savant naturaliste COSTE concevait les principes d'une technique ostréicole complète et/en faisant la démonstration pratique. Né en 1807 à Castries (Hérault), mort en 1873, Jean Coste entra à l'Académie des Sciences en 1851. Il fut également membre de l'Académie de Médicine et professeur au Muséum puis au Collège de France; il fonda le laboratoire de zoologie et physiologie maritimes de Concarneau et en fut le premier directeur. En 1892, il se vit confier la charge d'inspecteur général de la pêche fluviale et de la pêche côtière maritime. Dans le domaine qui nous intéresse particulièrement, l'ouvrage de Coste le plus fréquemment cité est le récit commenté et accompagné de suggestions qui porte sur tire : "Voyage d'exploration sur le...
Tipo: Text
Palavras-chave: Ostréiculture; Jean Coste; Histoire; Production huîtrière; Huître.
Ano: 1954
URL: http://archimer.ifremer.fr/doc/00002/11325/7862.pdf

Contribution à l'étude de l'ontogenèse du système immunitaire chez l'huître creuse Crassostrea gigas
Provedor de dados: 5
Autores: Tirape Bajana, Ana.
The interest for the understanding of the immune mechanisms in the oyster, Crassotrea gigas has been considerably increased these last years, mainly because of economie losses due to diseases which affected the continuity of this species. The studies of these mechanisms contributes to a better understanding of the differential susceptibilities observed in this species against various pathogens. In the present study, our  goal was to define the ontogenesis of immune system in C. gigas during the development, by functional genomic approaches. The studies have been focalized on the analyses of expression and localization of effectors previously identified in adult oysters as implicated in immunity. We have shown, in particular, that hemocytes appear in the...
Tipo: Text
Palavras-chave: Invertébré; Mollusque bivalve; Huître; Cra; Immunité; Hémocytes; Hématopoïèse; Développement; Ontogenèse; Expression des gènes; Q-PCR; SSH; Invertebrate; Bivalve Mollusk; Oyster; Crassostrea gigas; Immunity; Hemocytes; Hematopoiesis; Development; Ontogenesis; Gene expression; Q-PCR; SSH.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00440/55113/56565.pdf

Recherche d'AND d'herpèsvirus infectant les bivalves dans des échantillons d'eau de claires ostréicoles
Provedor de dados: 5
Autores: Solliec, Gaëlle; Vigneron, Valérie; Montanie, Hélène; Renault, Tristan.
Viral particles, associated with high mortality rates, have been reported among larvae and juveniles in different marine bivalve specie and characterized as member of the Hespesviridae family. Most studies focused on the detection of such viral infections among economically important species. However, the persistence of bivalve herpes viruses in marine environment is poorly documented. This topic appears as an important research domain in order to clarify the natural infection cycle of the herpesvirus of marine bivalves.
Tipo: Text
Palavras-chave: Herpesviridae; Oyster; PCR; DNA; Herpesvirus; Huître; PCR; ADN.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/acte-2856.pdf

Les risques conchylicoles en Baie de Quiberon. Deuxième partie : le risque de prédation sur l’huître creuse Crassostrea gigas. Rapport final du projet Risco 2010-2013
Provedor de dados: 5
Autores: Mazurie, Joseph; Stanisiere, Jean-yves; Bouget, Jean-francois; Langlade, Aime; Leclerc, Emilie; Quinsat, Kevin; Herve, Gilles; Augustin, Jean-marie; Ehrhold, Axel; Sinquin, Jean-marc; Meidi-deviarni, Ika; Goubert, Evelyne; Cochet, Helene; Dreano, Alain.
This study (“Risco”), implicating both industry, socio-economic experts and biologists, was funded by the Regional Council of Brittany, for 3 years (2010-2012), to investigate about the causes of oysters (Crassostrea gigas) mortalities in the bay of Quiberon (South Brittany, France). The protocol including both a sonar and video visualization of the bottom, and a monthly survey of 15 experimental oyster structures, allowed to assess the risk due to predation. A clear spatial distribution of the predatory effect was evidenced, with starfish (Asterias rubens and Marthasterias glacialis) predominating in the North-East sector, and boring snails (Ocenebra erinacea and Pterophora inornata) in the South-Center area.. The main mortalities from these predators...
Tipo: Text
Palavras-chave: Baie de Quiberon; Huître; Crassostrea gigas; Risque; Mortalité; Prédation; Étoiles de mer; Bigorneaux perceurs; Risco; Bay of Quiberon; Oyster; Crassostrea gigas; Risk; Mortality; Predation; Starfish; Oyster drills; Risco.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00180/29130/27534.pdf

Suivi de la reproduction de l'huître creuse Crassostrea gigas et de la moule Mytilus edulis dans le bassin de Marennes-Oléron. Bilan de trois années d'observation de 1997 à 2000. Rappels sur la reproduction de C. gigas et la technique de pêche de larves
Provedor de dados: 5
Autores: Arnaud, Christophe; Faury, Nicole; Bouquet, Jean-paul; Guesdon, Stephane.
Monitoring of reproduction in the oyster Crassostrea gigas, and more particularly in the mussel Mytilis edulis were conducted, in the Marennes-Oléron Bay each year, from June to September. This report gives the main results obtained in 1997, 1998, 1999,2000 and compares the results between years. It also summarises the fishing techniques used and gives information on larval development in the annexes. NOT CONTROLLED OCR
Tipo: Text
Palavras-chave: Marennes Oléron; Larvae; Reproduction; Mussel; Oyster; Marennes Oléron; Larves; Reproduction; Moule; Huître.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/rapport-3883.pdf

Impact du sédiment sur les mortalités estivales de naissain d'huîtres creuses Crassostrea gigas en baie de Quiberon
Provedor de dados: 5
Autores: Bedier, Edouard; Knoery, Joel Radford; Fleury, Pierre-gildas; Quiniou, Francoise; Langlade, Aime; Cozic, Amandine; Delesmont, Edith; Delesmont, Régis; Caisey, Xavier; Lecureuil, Laetitia.
The phenomenon of summer mortalities of the Pacific cupped oyster Crassostrea gigas is observed in France since the beginning of the 90's. These mortalities are classically associated to younger stages and summer temperatures and occur during the reproduction period of the animal. The studies undertaken during the project Morest (2001-2005), showed that a number of biological and environmental risks, the interaction of them induces lethal stresses for animals in physiological weakness, exists in summer. Among these risks, that which is withstood by the oysters bred close to the sediment proved to be significant in intertidal areas. In Quiberon bay (southern Brittany, France), the breeding practices of sowing oysters in deep water is thus likely to expose...
Tipo: Text
Palavras-chave: Huître; Crassostrea gigas; Mortalité; Sédiment; Composé réduit; Flux; Sulfure; Ammonium; Oyster; Crassostrea gigas; Mortality; Sediment; Reduced compound; Flux; Sulphide; Ammonia.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00108/21956/19550.pdf