|
|
|
| Registros recuperados: 33 | |
|
|
| Bacher, Cedric. |
| A model of the growth of cultivated oyster in the Marennes-Oléron bay was developped to assess the influence of the nutrients input and of the amount of oysters on the growth performance (Railiard. 1991). The ecosystem main characteristics are: - short residence time of the water. - high turbidity level, depending on the season, tidal level, bathymetry, currents and wind. The turbidity acts on the primary production through light limitation and on oyster production as a food dilution factor. - presence of high density cultivated areas on mid-tidal flats. The amount of oysters is ranging between 80 000 and 110 000 tons according to the year. - spatial variability of the biological and physical features. - coupling effects of the physic process (transport,... |
| Tipo: Text |
Palavras-chave: Ecosystem model; Oyster; Crassostrea gigas; Nitrogen cycling; Marennes Oleron Bay; Charente Maritime. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00102/21300/18914.pdf |
| |
|
|
| Barille, Laurent; Prou, Jean. |
| Ecophysiological experiments conducted in situ in the Bay of Marennes-Oléron during a spring and neap tide cycle in May 1991 , were designed to get a better representation of 2 important components of the energy budget of the Japanese oyster Crassostrea gigas : clearance rate and selection efficiency. The relationships previously established by Raillard et al. ( 1993) are re-evaluated by integrating the effects of high seston loads, typical of tidal effect within estuaries, on the physiological processes. For the clearance rate, the re-evaluated parameterization includes: - a negative effect of turbidity. - a clogging threshold set to 192 mg/l. Selection efficiency parameterizations are modified by incorporating : - a constant inorganic ingestion for... |
| Tipo: Text |
Palavras-chave: Matematical model; Oyster; Crassostrea gigas; Clearance rate; Seclection efficency; Marennes Oleron; Charente Maritime. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00102/21299/18913.pdf |
| |
|
| |
|
|
| Prou, Jean. |
| Managing the water resource finds a special dimension on the coastal strip. This resource is not shared between the different users according to the classical schemes of catchment areas, linking quality and quantity. The measure of a river water flow turns into currents in the marine field and the freshwater volumes turn into salinity units illustrating the fresh water / salt water mix. As a consequence, in a participative management approach as recommended by the GIZC (Integrated Management of the Coastal Zone) procedures, it seems fundamental that the actors from the terrestrial and marine worlds and their interfaces share their perceptions in order to improve the quality of the management scenarios. This shared perception of the catchment area and... |
| Tipo: Text |
Palavras-chave: Charente Maritime; Pertuis charentais; Gestion eau; Conchyliculture. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/acte-3516.pdf |
| |
|
| |
|
|
| Masson, Daniel. |
| Suedre River, a small river in Charente-Maritime, is 45 km long and drains a 380 km2 river basin. Its flow rate is about 20 m3.s(-1). Beyond the Saujon agglomeration, the river extends to the sea via a 25-km long estuary which, through the action of tides, becomes a sea arm reaching 1 km in width. Freshwater and salt marshes line the banks of the Seudre River. Freshwater marshes are occupied by large cattle farms and intensive, irrigated crops. Salt marshes are used for oyster finishingthe final, fattening process in oyster farming. The coexistence of both types of activity is sometimes problematic, particularly in terms of water management, a frequent source of conflict. The climate in Charente-Maritime is characterised by dry summers and rainy winters,... |
| Tipo: Text |
Palavras-chave: Ostréiculture; Agriculture; Eau douce; Gestion eau; Seudre; Charente Maritime; Estuaire. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/1997/acte-3211.pdf |
| |
|
| |
|
|
| Piquet, Jean-come; Fillon, Alain; Thomas, Gerard. |
| L’estuaire de la Seudre est situé dans le bassin de Marennes-Oléron, au cœur de l’écosystème des Pertuis Charentais. L’estuaire alimente la majorité des surfaces de claire de la région, qui elle même, assure plus de la moitié de la commercialisation nationale. La contamination microbiologique de l’estuaire de la Seudre est donc un enjeu majeur pour l’ostréiculture. L’estuaire possède un bassin versant de faible dimension et dont le fonctionnement hydrologique est particulier. Il est relié à un très important ensemble de zones humides, et les débits d’eau douce sont dépendants de la gestion d’ouvrages hydrauliques. Les périodes d’étiage sont sévères et longues, et les apports d’eau douce à l’estuaire sont quasiment nuls en fin d’été et en début... |
| Tipo: Text |
Palavras-chave: Microbiologie; Contamination microbiologique; Bactériologie; Estuaire; Seudre; Charente Maritime. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00129/24048/22011.pdf |
| |
|
|
| Bodoy, Alain; Geairon, Philippe. |
| Le bassin de Marennes-Oléron est le premier centre ostréicole de France, avec un stock de 93 700 tonnes en août 1987. L'opération d'échantillonnage a montré que ce chiffre comprenait 36 500 tonnes pour l'élevage à plat, 33 000 tonnes pour la première phase d'élevage sur tables, qui concerne l'élevage sur collecteurs de captage et 24 200 tonnes pour la phase finale représentée par l'élevage en poche. Le niveau du stock est en augmentation constante depuis 1984. L'importance pondérale de chaque classe d'âge est susceptible de fluctuer très largement puisque des huîtres âgées de 1 an représentaient 4 400 tonnes en 1987, alors que la classe d'âge correspondante représentait 17 000 tonnes en 1986. Ceci est dû aux variations annuelles du captage. Une méthode... |
| Tipo: Text |
Palavras-chave: Ostréiculture; Stocks; Captage; Croissance; Production; Huîtres creuses; Crassostrea gigas; Marennes Oléron; Charente Maritime. |
| Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/00014/12480/9326.pdf |
| |
|
| |
|
|
| Thomas, Gerard; Kantin, Roger; Heral, Maurice. |
| A coastal river 380 km long, the Charente river has a catchment area of about 10,000 km2, flowing through the departments of Charente and Charente-Maritime, as well as a small part of the border departments: Dordogne, Deux-Sèvres, Haute-Vienne and Vienne. Its main affluents are the Tardoire, the Seugne and the Boutonne rivers. The highest part of the catchment area is located in Dordogne, at a height of 496 m, whereas the river itself originates from a spring located at a height of 250 m to the south-east of Rochechouart, in the Haute-Vienne. The average height of the catchment area is quite low. In its downstream part, from the Saint-Savinien dam to the ocean, the Charente is influenced by a dynamic tide. The actual estuarine part begins in... |
| Tipo: Text |
Palavras-chave: Charente Maritime; Gestion eau; Qualité eaux; Conchyliculture; Capacité trophique; La Charente; Estuaire. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/publication-6289.PDF |
| |
|
| |
|
|
| Bacher, Cedric. |
| The residence time of the water in different parts of the Marennes-Oléron Bay is one important characteristic of the biological system (Raillard, 1990). For instance, the primary production potentiality of a given area depends on the local turbidity and the residence time of the waters in that area. Further, global assessments of the nitrogen flow between the biological compartments and inflows from the ocean or the Charente river derived from the ecosystem model by Raillard (1990), showed the predominance of the latter term onto the former. A new hydrological model of the Marennes-Oléron Bay yielded two dimensional velocity fields for sorne standard tidallevels: neap-tide, spring-tide, mean tide (Lazur, unpub.). These computations were the basis for the... |
| Tipo: Text |
Palavras-chave: Ecosystem modelling; Box model; Marennes Oleron Bay; Charente Maritime. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00102/21306/18919.pdf |
| |
|
| |
|
| |
|
|
| Arnaud, Christophe; Fillon, Alain. |
| Le littoral charentais-maritime présente, dans sa partie nord entre l'estuaire de la Charente et la limite nord du département (île de Ré comprise), plusieurs sites intéressant l'ostréiculture pour le captage de juvéniles, dont le centre réputé de Fouras. Pour aider la profession, et selon son souhait, une assistance est fournie par l' IFREMER qui recherche les périodes d'émission de larves d'huîtres creuses afin d'informer les ostréiculteurs des époques les plus propices au captage. Contractualisé pour la première fois en 1996 entre la SRC RE-CENTRE OUEST et l' IFREMER, ce travail a été effectué à nouveau en 1997 par le laboratoire côtier DEL de La Rochelle, suite au renouvellement de ce contrat. Le présent rapport expose les différents aspects de ce... |
| Tipo: Text |
Palavras-chave: Reproduction; Larves; Crassostrea gigas; Charente Maritime. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00049/16068/13529.pdf |
| |
|
| |
|
| |
|
|
| Moreau, Jean. |
| The greening of oysters in fattening ponds, known of since SPRAT (1669), was made clear by GAILLON (1820) who described "the green coloration that oysters placed in basins acquired" and observed that this coloration was localised particularly in the gills. He specified the agent of this phenomenon, which he call Vibrio ostrearia, a spindle-shaped organism, about 100µ long, placed since then in the genus Navicula by BORV DE SAINT-VINCENT (1823). The pigment emitted by this navicular, classified today as one of the Pennales, was called "Marennine" in 1886 by RAY-LANCASTER. |
| Tipo: Text |
Palavras-chave: Marennes Oléron; Charente Maritime; Navicula ostrearia; Verdissement; Claire à huîtres. |
| Ano: 1967 |
URL: http://archimer.ifremer.fr/doc/1967/publication-2981.pdf |
| |
|
|
| Ifremer. |
| L’Ifremer met en oeuvre, à l’échelle de l’ensemble du littoral métropolitain, une surveillance de la qualité du milieu marin côtier pour répondre aux objectifs environnementaux de la Directive Cadre sur l’Eau (DCE), aux obligations des conventions régionales marines (OSPAR et Barcelone) et aux objectifs sanitaires réglementaires concernant le suivi de la salubrité des coquillages des zones de pêche et de production conchylicoles. Cette surveillance s’appuie sur plusieurs réseaux de surveillance : le réseau de contrôle microbiologique (REMI), le réseau de surveillance du phytoplancton et des phycotoxines (REPHY), le réseau d’observation de la contamination chimique (ROCCH) et le réseau de surveillance benthique (REBENT). Ces réseaux sont mis en oeuvre par... |
| Tipo: Text |
Palavras-chave: Réseau surveillance; Microbiologie; Phytoplancton; Phycotoxine; Contamination chimique; Charente Maritime; Sud Vendée. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00109/22032/19666.pdf |
| |
| Registros recuperados: 33 | |
|
|
|
