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Acquisition de donnée en continu sur la matière particulaire de la Baie estuarienne de Marennes-Oléron pendant le bloom printaniter planctonique : effet sur le taux de filtration de l'huître Crassostrea gigas ArchiMer
Heral, Maurice; Razet, Daniel; Prou, Jean.
The continuous obtention of different signals has been achieved for 9 days at a -fixed station during May 1988. The speed and direction of the currents have been monitoring concurrently with "in situ" turbidity and fluorescence in relation with the meteorological conditions. The concentration in particulate matter and the planktonic fluorescence fluctuated in direct relation with the water depth, the speed of the current and with the origin of the water masses. The oysters submitted to these large fluctuated conditions showed not constant filtration rate. The filtration calculated by turbidimeters (2 1 h-l g-1 dry weight) was three time less than the one achieved with fluorimeters (61 h-l g-1 dry weight). The filtration rate were fluctuated but not in...
Tipo: Text Palavras-chave: France; Marennes Oleron bay; Acquirring of continous data; Filtration; Crassostrea gigas; Particular matter; Marennes Oléron; Aquisition données; Courantologie; Filtration; Crassostrea gigas; Matière particulaire.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-3021.pdf
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Fonctionnement des marais maritimes atlantiques: échanges d'énergie et effets des flux aquacoles diffus ArchiMer
Bel Hassen, Malika.
French estuaries, from the Atlantic coast to the English channel, have been characterized by a poor phytoplankton biomass. The turbidity has always been considered as the limiting factor for phytoplankton. Estuarine ecosystems are situated at the boundary between the land and the sea. Consequently, they are subject to an enrichment by nutrient loadings from upland ecosystems. Although it has been demonstrated that a part of the nutrient loadings support an important benthic production. The part, which escapes to the estuarine benthic and planktonic food web and is exported to adjacent estuarine ecosystems, still remains undetermined. Quantifying the nu trient and particulate matter exchange between a macrotidal Bay, the Fier d'Ars, and the adjacent ocean...
Tipo: Text Palavras-chave: Aquaculture; Exportation; Matière dissoute; Fiers d'Ars; Systèmes d'Information Géographique; Importation; Usages; Lumière; Micorphytobenthos; Modélisation; Nutriments; Matière organique; Matière particulaire; Phytoplancton; Sédimentation; Aquaculture; Export; Dissolved matter; Fier d'Ars Bay; Geographic Information Systems; Import; Land use; Light; Microphytobenthos; Modelling; Nutrients; Organic matter; Particulate matter; Phytoplankton; Sedimentation.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00450/56185/57738.pdf
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L'élevage conchylicole sur filière : revue bibliographique ArchiMer
Robert, Stephane; Prou, Jean; Le Moine, Olivier; Taillade, Sylvie.
La revue bibliographie de l'élevage conchylicole sur filière permet de situer l'évolution de cette technique en France et dans le monde. Elle regroupe les travaux disponibles tant sur les méthodes et les techniques, que sur les contraintes biologiques et environnementales qui conditionnent ce type d'élevage. Les techniques d'élevage conchylicole sur filières sont directement dépendantes de l' environnement disponible. Si l'élevage sur filière de surface nécessite des zones protégées peu disponibles sur le littoral atlantique, la filière de sub-surface correspond mieux aux possibilités de développement en site semi-abrité tels que les Pertuis charentais. L'élevage en filières immergées permet d'envisager la recherche de nouveau espace en mer ouverte comme...
Tipo: Text Palavras-chave: Algue toxique; Bioaccumulation; Capacité trophique; Compétiteur; Densité élevge; Elevage en suspendu; Filière; Eutrophisation; Génétique; Matière particulaire; Mer ouverte; Mortalité; Phytoplancton; Pollution; Production primarie; Technique élevage; Transfert de biotope.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/00074/18510/16050.pdf
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Origine, devenir et contrôle de la matière particulaire dans les élevages de poissons marins en système recyclé ArchiMer
Franco, Miguel.
The particulate matter plays an essential role in the functioning of recirculating aquaculture systems (RAS). Rich in organic substances, it provides ideal conditions for the bacterial development, which contribute to its mineralization. The understanding of interactions between the bio-geochemical cycles of carbon and nitrogen in these processes is necessary to define an effective and adapted management of aquaculture facilities. A methodology using natural stable isotopes (13C and 15N) and elemental carbon and nitrogen analysis on particulate matter, allows to identify its sources and to quantify its fluxes. Applying this methodology, we found an enrichment of 13C in dorsal muscle of reared fish and non differences of 13C in fish liver compared to the...
Tipo: Text Palavras-chave: Nitrogen; Carbon; Isotopes; Organic matter; Particulate matter; Dicentrarchus labrax; Seabass; Recirculating systems; Aquaculture; Azote; Carbone; Isotopes; Matière organique; Matière particulaire; Dicentrarchus labrax; Bar; Système de recirculation; Aquaculture.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/these-322.pdf
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Seasonal variability of the advective transport of particulate matter and organic carbon in the Gulf of Lion (NW Mediterranean) ArchiMer
Lapouyade, Agnes; Durrieu De Madron, Xavier.
Nine hydrographic cruises were performed on the Gulf of Lion continental margin between June 1993 and July 1996. These observations are analysed to quantify the fluxes of particulate matter and organic carbon transported along the slope by the Northern Current and to characterise their seasonal variability. Concentration of particulate matter and organic carbon are derived from light-transmission data and water sample analyses. The circulation is estimated from the geostrophic current field. The uncertainty on the transport estimate, related to the error on the prediction of particle concentrations from light-transmission data and the error on velocities, is assessed. The particulate matter inflow entering the Gulf of Lion off Marseille is comparable to...
Tipo: Text Palavras-chave: Transport advectif; Bilans; Golfe du Lion; Matière particulaire; Carbone organique; Advective transport; Budget; Gulf of Lion; Organic carbon; Particulate matter.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/00322/43357/42823.pdf
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