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| Registros recuperados: 22 | |
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| Gras, Marie-paul; Gras, Paul; Guichard, Claude; Peyre, Roger. |
| Sheltered by the Isle of Oléron, benefiting from the supply of fresh water from two rivers, the Charente and the Seudre, the Marennes-Oléron basin enjoys, in Charente-Maritime, a privileged topographical situation. Oyster farming, one of the first forms of marine aquafarming, represents the central business activity of this shoreline of the Charente, whose originality is to own more than 90% of the oyster pits currently listed in France. This peculiarity has been described by several authors: Moreau (1970), Gras (1976), Grelon (1978) and Marteil (1979). |
| Tipo: Text |
Palavras-chave: Croissance; Biologie; Claires ostréicoles; Ostréiculture; Huîtres. |
| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/1981/publication-2941.pdf |
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| Goulletquer, Philippe; Le Moine, Olivier; Soletchnik, Patrick; Razet, Daniel; Turpin, Vincent; Robert, Jean-michel; Gras, Paul; Faury, Nicole; Geairon, Philippe; Taillade, Sylvie; Lodato, Marie; Lagarde, Franck. |
| La contractualisation SRC/IFREMER-URAPC concernait en 1996 trois actions spécifiques : • Expertise pour les cultures d'huîtres en eaux profondes, • Suivi de l'activité physiologique sur le banc de Ronce, • Valorisation des claires ostréicoles - optimisation du processus d'affinage. Le premier thème n'a pu être abordé que via les différentes réunions préparatoires SRC Ré Centre Ouest, Marennes-Oléron et les commissions des cultures marines. Depuis l'accord de la CCM de La Rochelle en date du 11/04/1996, le dossier reste en attente d'un accord budgétaire des différents partenaires. Le second thème concerne le suivi de l'activité physiologique des huîtres creuses sur le banc ostréicole de Ronce-Perquis. La méthodologie est basée sur l'utilisation d'un... |
| Tipo: Text |
Palavras-chave: Ostréiculture; Elevage en eaux profondes; Crassostrea gigas; Physilogie; Mortalité; Claire ostréicole; Bassin de Marennes Oléron; Charente-Maritime. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00102/21316/18936.pdf |
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| Gras, Paul. |
| A microbiological study of the water and substrate in the Belon River was carried out during the summer of 1967, when the stocks of cultured oysters suffered very high mortalities. At the same time as the oyster mortalities there were dramatic decreases in the numbers of organisms, such as the diatoms and dinoflagellates, in the water. The numbers of bacteria, on the other hand, both in the water and in the surface layers of the substrate, reached very high levels, particularly amongst the anaerobic forms. It seems that the death of most of the organisms and the proliferation of the bacteria was due to the arrival of highly saline and cold water, which was rich in nutritive salts and poor in dissolved O sub(2). The augmentation of this water by organic... |
| Tipo: Text |
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| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-2379.pdf |
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| Comps, Michel; Gras, Paul. |
| A year after the end of the Gill disease which heavily struck the Portuguese oysters Cassostrea angulata Lmk. (Marteil, 1968), a new disease whose causes are still unexplained caused a massive mortality in the same species in the summer of 1970 (Comps, 1972). It can be considered, in 1973, that the successive losses lead to the quasi-extinction of the species C. angulata in the farms of the Marennes basin, since, contrary to what has been done in the case of the Malpèque disease in Canada, the indigenous specious was replaced by another species, the Pacific oyster Crassostrea gigas Thunberg. |
| Tipo: Text |
Palavras-chave: Marennes Oléron; Huîtres; Mortalité; Crassostrea angulata. |
| Ano: 1973 |
URL: http://archimer.ifremer.fr/doc/1973/acte-5927.PDF |
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| Gras, Marie-paule; Gras, Paul. |
| Following the high mortality which killed the Portuguese oysters Crassostrea angulata cultivated on the French coasts, the massive establishment of Pacific oysters Crassostrea gigas, resisting the disease and the creation of artificial deposits for the latter was decided. In most culture areas, the mortality was estimated at more than 80 % of the stock, but, in some regions, some small populations of Crassostrea angulata subsisted and kept on reproducing. A genetic control of the spawner stocks had to be made. The first step was to know if the oysters living in the same areas were of the same species in order to foresee the next generations and try to improve them (selection). |
| Tipo: Text |
Palavras-chave: Sélection; Determination; Crassostrea gigas; Crassostea angulata; Huîtres; Génétique. |
| Ano: 1977 |
URL: http://archimer.ifremer.fr/doc/1977/acte-6579.pdf |
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| Alderman, D. J.; Gras, Paul. |
| During April and May of this year, there has been a heavy mortality of Portuguese oysters, Crassostrea angulata LmK., which were imported into Britain from the River Tagus (Portugal) in March. Losses in some cases exceeded 90 per cent. The symptoms shown by the dyring oysters are the same as those seen in Britain and France in C. angulata in 1967 and 1968. Farley described the general symptoms in oysters (C. virginica Gmelin) dying of prolonged functional or infectious disease. These gross symtoms appear to be similar in the case of several different diseases including the present European mortality. |
| Tipo: Text |
Palavras-chave: Gill; Crassostrea angulata; Oysters. |
| Ano: 1969 |
URL: http://archimer.ifremer.fr/doc/1969/publication-5931.PDF |
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| Goulletquer, Philippe; Geairon, Philippe; Faury, Nicole; Razet, Daniel; Soletchnik, Patrick; Gras, Paul; Adessi, L.. |
| In European waters, significant economic damages to wooden structures are caused by bivalves molluscs and crustaceans. Treatments like copper-chrome-arsenic mixtures (CCA) were designed to prevent settlement of these wood borer species. However, limited and conflicting evidence regarding the toxicity to non-target organisms are available in the literature. This report aims to provide insights regarding the CCA leachates' toxicity to an important aquaculture species, the blue mussel Mytilus edulis for which much information on normal and stressed physiology is available for purposes of comparisons. The mussels are usually considered as a particularly suitable species for biological monitoring (Smaal and Widdows, 1994). To address the CCA leachate issue, two... |
| Tipo: Text |
Palavras-chave: Bivalvia; Mussel; Mytilus edulis; Copper-chrome-arsenic (CCA); Treatment; Feeding; Absorption. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00043/15437/12788.pdf |
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| Gras, Paul; Comps, Michel; David, A.; Baron, G.. |
| During the summer of 1970 mortality started in the Marennes-Oléron Basin which affected successively adult oysters, 18 year-old oysters and then the oyster spats collected the same year. Only the Portuguese oyster (Crassostrea angulata) was dying whereas the Pacific oyster (Crassostrea gigas) showed total resistance. The abnormal fixation of the 1970 spats, followed by an important mortality in this latter, and the large decrease of adult oyster stocks, and therefore of genitors, were also a reason for oyster farmers to worry as the new reproduction season was about to start. Some measures had to be taken in order to compensate for the lack of genitors susceptible of producing a tough and vivacious spat. The good results obtained for a few years with C.... |
| Tipo: Text |
Palavras-chave: Naissain; Larves; Marennnes Oléron; Crassostrea gigas; Reproduction. |
| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/publication-6446.PDF |
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| Soletchnik, Patrick; Le Moine, Olivier; Geairon, Philippe; Razet, Daniel; Goulletquer, Philippe; Faury, Nicole; Fouche, Dominique; Gras, Paul. |
| Traditionnellement pratiqué dans les marais maritimes autour du bassin de Marennes Oléron, l'affinage des huîtres en claires est destiné à améliorer leur qualité tant d'un point de vue organoleptique et engraissement que du durcissement des animaux. Le but recherché est d'obtenir un gain de poids de chair, une augmentation des réserves glucidiques, une saveur particulière, et un renforcement de la coquille. La claire ostréicole constitue par ailleurs une zone de stockage privilégiée du cheptel avant la commercialisation de la production au cours de la deuxième quinzaine du mois de décembre. Le savoir faire empirique des professionnels ne permet pas de pallier la variabilité importante des caractéristiques de ces élevages, assujettis aux variations... |
| Tipo: Text |
Palavras-chave: Claires ostréicoles; Huîtres creuses; Crassostrea gigas; Affunage; Zootechnie; Production phytoplanctonique; Ressources trophiques; Marennes Oléron. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00199/31007/29410.pdf |
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| Lasserre, Claudine; Gras, Paul. |
| Après qu'on eut observé, d'abord chez Crassostrea angulata, puis chez Ostrea edulis et C. gigas, de diverses provance, des anomalies dans la morphologie et la structure des branchies -décrites sous le nom de "maladie des branchies", la question s'est posée de savoir si d'autres mollusques vivant dans le même milieu et, très souvent, auprès des huîtres, présentaient des altérations semblables. |
| Tipo: Text |
Palavras-chave: Mytiliculture; Mytilus edulis; Morphologie; Physiologie; Anomalie. |
| Ano: 1969 |
URL: http://archimer.ifremer.fr/doc/00010/12117/8843.pdf |
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| Goulletquer, Philippe; Gras, Paul; Geairon, Philippe. |
| Le programme « Qualité de 1 'huitre creuse Crassostrea gigas développé depuis 1995 par l'IFREMER contient dans ses objectifs l'établissement d'une grille de qualité pour ce coquillage (Grizel, 1998). En l'absence d'étude exhaustive sur la disponibilité et la variabilité de la qualité de C. gigas commercialisée, il apparait difficile d'établir une telle grille. Différents facteurs vont influer les caractéristiques du produit mis en marché sur le plan national. On peut citer en particulier : le secteur géographique d'origine, la période de commercialisation en cours d'année, le mode d'élevage et/ou d'affinage et globalement les pratiques culturales définies par l'éleveur, Pour l'ensemble de ces raisons, un échantillonnage national a été réalisé pendant la... |
| Tipo: Text |
Palavras-chave: Qualité produit; Huître creuse; Crassostrea gigas; Norme AFNOR. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00077/18793/16369.pdf |
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| Registros recuperados: 22 | |
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