|
|
|
| Registros recuperados: 89 | |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
| Registros recuperados: 89 | |
|
|
|
