Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 16
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Cadmium pathways in an exploited intertidal ecosystem with chronic cadmium inputs (Marennes-Oleron, Atlantic coast, France) ArchiMer
Pigeot, J; Miramand, P; Guyot, T; Sauriau, Pierre-guy; Fichet, D; Le Moine, Olivier; Huet, V.
The Marennes-Oleron Bay is subject to chronic pollution by cadmium (Cd) from the Gironde watershed. An ecosystem approach was used to study the fate of cadmium in the different biological compartments. The median Cd concentration was 0.4 mu g g(-1) dry weight for the 63 benthic species measured. When combined with the respective biomasses for the different species studied, we estimated that 7 kg of Cd is partitioned into the soft tissues of the benthic species in the bay. The majority of this cadmium was distributed between primary producers, mainly microphytobenthos (40 %), and suspension-feeders, mainly oysters (40 %). All other benthic species measured were associated with negligible masses of Cd. Two trophic levels contained 98 % of the Cd: 3 kg was...
Tipo: Text Palavras-chave: Marennes Oleron Bay; Trophic food web; Bioaccumulation; Cadmium; Macrofauna; Microphytobenthos; Macrophytes.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-3615.pdf
Imagem não selecionada

Imprime registro no formato completo
Capacité trophique du bassin de Marennes-Oléron : couplage d'un modèle de transport particulaire et d'un modèle de croissance de l'huître Crassostrea gigas ArchiMer
Bacher, Cedric.
The trophic relationship between a population of cultivated oysters and potential food was modeled in Marennes-Oleron Bay. Coupling the transport process of particulate matter with assimilation by a population of oysters was achieved through a box mode!. Transport between boxes was based on a mass conservation equation. Parameters were derived from volumes of the boxes, tidal movements and residual 110ws between boxes, and were computed from a numerical hydrodynamical model. Consumption, assimilation and respiration terms were put into an energetic budget equation which enabled simulation of growth. A result of the model was the variability of growth along an axis from North to South, which was related to the oysters' accumulated consumption of food....
Tipo: Text Palavras-chave: Marennes Oleron Bay; Growth; Energetic budget; Crassostrea gigas; Trophic capacity; Box model; Marennes Oléron; Croissance; Bilan énergétique; Crassostrea gigas; Capacité trophique; Modèle en boîtes.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/publication-2882.pdf
Imagem não selecionada

Imprime registro no formato completo
Contribution to a synopsis of marine species richness in the Pertuis Charentais Sea with new insights in soft-bottom macrofauna of the Marennes-Oleron Bay ArchiMer
De Montaudouin, Xavier; Sauriau, Pierre-guy.
The catalogue of soft-bottom macrofauna in the Marennes-Oleron Bay (French Atlantic coast) has been updated from a benthic survey conducted in April-May 1995. 262 stations were selected using a stratified random strategy based on sediment types and bathymetric levels. 231 soft-bottom macrofauna species were identified. A synopsis of all available literature since the first local marine study published in 1710 by Antoine Ferchauld de Reaumur indicated that 60 benthic species were reported in the Marennes-Oleron Bay for the first time. The sampling effort, i.e. more than 1 station per km(2) and size of the sieving square mesh (1 mm), can partially explain these results. Most of the new recorded species were crustaceans (28 species) and polychaete annelids...
Tipo: Text Palavras-chave: Pertuis Charentais; Marennes Oleron Bay; Checklist; Species richness; Macrozoobenthos.
Ano: 2000 URL: https://archimer.ifremer.fr/doc/2000/publication-885.pdf
Imagem não selecionada

Imprime registro no formato completo
Distributional overlap rather than habitat differentiation characterizes co-occurrence of bivalves in intertidal soft sediment systems ArchiMer
Compton, Tanya J.; Troost, Tineke A.; Van Der Meer, Jaap; Kraan, Casper; Honkoop, Pieter J. C.; Rogers, Danny I.; Pearson, Grant B.; De Goeij, Petra; Bocher, Pierrick; Lavaleye, Marc S. S.; Leyrer, Jutta; Yates, Mick G.; Dekinga, Anne; Piersma, Theunis.
Diverse species assemblages are often associated with a diversity of habitat structures. Sedimentary systems seem to be no exception, as within sedimentary systems benthic species diversity within a sample point appears to correlate with sediment grain size complexity. However, it remains to be shown whether total benthic species diversity relates to a system's sediment heterogeneity across multiple systems. In the present paper we examined whether bivalve diversity is associated with: (1) sediment heterogeneity across systems and (2) sediment grain size complexity within systems, at 9 temperate and tropical tidal flat systems. Although bivalve life-history strategies, like post-settlement habitat selection, might suggest that sediment heterogeneity should...
Tipo: Text Palavras-chave: Aiguillon Bay; Marennes Oleron Bay; Mont Saint Michel Bay; Wadden Sea; The Wash; Roebuck Bay; Banc d'Arguin; Sediment diversity.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6141.pdf
Imagem não selecionada

Imprime registro no formato completo
Echantillonnage des populations naturelles de mollusques compétiteurs trophiques des huîtres cultivées Crassostrea gigas du bassin de Marennes-Oléron : aspects méthodologiques ArchiMer
Sauriau, Pierre-guy.
The main problems involved in making biomass and density estimates of benthic mol1uscs are the choice of a sampling plan, the level of systematic errors and random errors. A stratified random sampling after optimum allocation was used in the case. The benthic molluscs estimates (biomass or density) are highly variable, due to their aggregated distribution. The sampling gear used is a Smith Mc-lntyre grab which introduce a bias in the estimates. Nevertheless, the Macoma baLthica community was predominant in the bay but Cerastoderma edul.e appeared to be the dominant specie.
Tipo: Text Palavras-chave: Cerastoderma edule; Macoma balthica; Marennes Oleron Bay; Crassostrea gigas; Stock assessment; Cerastoderma edule; Macoma balthica; Marennes Oléron; Crassostrea gigas; Echantillonnage.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/acte-2971.pdf
Imagem não selecionada

Imprime registro no formato completo
Ecosystem Modelling: sensitivity of physical characteristics to spatial box design ArchiMer
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
Imagem não selecionada

Imprime registro no formato completo
Hydrologie du bassin de Marennes- Oléron. Analyse de la base de données "RAZLEC" 1977- 1995 ArchiMer
Faury, Nicole; Razet, Daniel; Soletchnik, Patrick; Goulletquer, Philippe; Ratiskol, Jacqueline; Garnier, Jacqueline.
An hydrobiological monitoring survey has been carried out in the Bay of Marennes-Oléron since 1977. Five stations, distributed over the Bay, were sam pied twice a month. Spatial and temporal trends of the physical characteristics (i.e., seawater, temperature, salinity, dissolved oxygen and suspended matter), nutrients (azote, nitrite, nitrate, silicate) and organic variables (chlorophyll a and pheopigments) were assessed by using a statistical time-series analysis mode\. It was used to distinguish seasonal variability from long term trends. Pluviometric data as weil as the Charente River fluxes were similary analyzed by the model. The seasonal variability showed an homogeneous pattern over the five stations for all parameters, but the site-dependent...
Tipo: Text Palavras-chave: Shellfish farming; Overall trends; Seawater seasonal variability; Marennes Oleron Bay; Hydrology; Conchyliculture; Tendances; Variations saisonnières; Marennes Oléron; Hydrologie.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/rapport-6379.pdf
Imagem não selecionada

Imprime registro no formato completo
Impacts des informations produites par l'IFREMER sur la qualité des eaux littorales dans la production et la commercialisation des coquillages ArchiMer
Dubuisson-quellier, Sophie.
La connaissance aussi bien que la gestion des écosystèmes marins suppose de disposer d'un réferentiel d'indicateurs et de mesures capable d'informer sur l'état du milieu. Le zonage, c'est-à-dire le découpage en zones géographiques, participe de la construction de ce réferentiel, notamment lorsqu'il permet ensuite la mise en place de réseaux de mesure pour la surveillance de la qualité du milieu littoral, dans un souci d'observation pour la gestion opérationnelle de ce milieu (politiques d'occupation des espaces, usages différents des espaces côtiers). Le principe du zonage est ancien (Morel, 1996) et peut varier en complexité selon qu'une seule variable descriptive est utilisée, comme dans le cas du zonage thématique basé sur la géographie physique et...
Tipo: Text Palavras-chave: Oyster; Ostreiculture; Mussel culture; Marennes Oleron Bay; Crassostrea Gigas; Water quality; Aquaculture; Economic impact; Coastal water; Marine pollution; Shellfish culture; SEM; Marennes Oleron bassin; Crassostrea gigas; Economie; Qualite eau; Controle sanitaire; Conchyliculture; Ostreiculture; Developpement aquaculture.
Ano: 2001 URL: https://archimer.ifremer.fr/doc/2001/rapport-1740.pdf
Imagem não selecionada

Imprime registro no formato completo
Influence du climat sur le recrutement et sur la production d'huîtres cultivées (Crassostrea angulata et Crassostrea gigas) dans le bassin de Marennes-Oléron (France) ArchiMer
Heral, Maurice; Deslous-paoli, Jean-marc; Prou, Jean.
Recruitment, marketed yield and cultivated biomasses of oysters Crassostrea angulata and Crassostrea gigas are compared to climatic indices for the period 1885-1984. Temperature plays a role up on the date of spawning but explains only partially the failure of recruitment, which has less influence on the marketed yield than on the total biomass Contrary to the sensitivity of wild molluscan stocks to climatic conditions, yield and biomass of these cultivated stocks are not hightly correlated to the annual and seasonal indices of rainfall and air temperature.
Tipo: Text Palavras-chave: Marennes Oleron Bay; Climatic conditions; Recrutment; Crassostrea gigas; Crassostrea angulata; Oysters; Marennes Oléron; Facteurs climatiques; Recrutement; Crassostrea gigas; Crassostrea angulata; Huîtres.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/acte-2972.pdf
Imagem não selecionada

Imprime registro no formato completo
Optimisation of the traditional Pacific cupped oyster (Crassostrea gigas Thunberg) culture on the French Atlantic coastline: autumnal fattening in semi-closed ponds ArchiMer
Soletchnik, Patrick; Le Moine, Olivier; Goulletquer, Philippe; Geairon, Philippe; Razet, Daniel; Faury, Nicole; Fouche, Dominique; Robert, Stephane.
Oyster farming in France is a traditional activity. Each year, 60,000 tons of C. gigas are fattened before being sold. Present-day fattening techniques for improving oyster taste and colour and increasing the meat weight are not particularly reliable. To optimize the fattening process, large phytoplanktonic blooms were induced in ponds, then distributed in oyster ponds. Despite the variability of the autumn weather conditions, diatoms (Skeletonema costatum) have been successfully cultured in outdoor ponds. During neap tides (when no seawater replenishes the water in the oyster beds), between mid-October and mid-December 1996, the fattening index (the weight of the meat) was constant or increased by 10-15% when a supplement of algae of 380.000...
Tipo: Text Palavras-chave: Fattening process; Crassostrea gigas; Oyster farming; Marennes Oleron Bay.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/publication-478.pdf
Imagem não selecionada

Imprime registro no formato completo
Seasonal sediment dynamics of the Marennes Oleron Bay : characterisation of superficial sediment textural properties and rheophysics ArchiMer
Kervella, Stephane; Robert, Serge; Pantet, Anne; Jarny, Sebastien.
Tipo: Text Palavras-chave: Sedimentology; Marennes Oleron Bay.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/00175/28604/27025.pdf
Imagem não selecionada

Imprime registro no formato completo
Situation of wild beds of Crassostrea gigas regarding OsHV-1 µvar: spatiotemporal description of contamination in Pacific oyster wild beds in Marennes Oleron Bay ArchiMer
Pepin, Jean-francois; Soletchnik, Patrick; Lupo, Coralie; Geairon, Philippe; Seugnet, Jean-luc; Robert, Stephane; Bernard, Ismal; Le Moine, Olivier.
This study focuses on the situation of wild oyster beds of Crassostrea gigas against OsHV-1 μvar and presents a spatio-temporal description of the OsHV-1 contamination in wild oyster beds in the bay of Marennes-Oléron from a range of sampling based on a hydrodynamic model and analyzes conducted in 2010. The objectives were to describe wild populations of pacific oysters in Marennes Oleron bay; to characterize these populations regarding OsHV-1 prevalence for spat and adults in connection with the isolation level from reared stocks and the sampling periods.
Tipo: Text Palavras-chave: Virus; OsHV-1; Contamination; Oysters; Crassostrea gigas; Spatiotemporal description; Marennes Oleron Bay.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00105/21673/19251.pdf
Imagem não selecionada

Imprime registro no formato completo
Spatial and temporal variations in trace metal concentrations in surface sediments of the Marennes Oleron Bay. Relation to hydrodynamic forcing ArchiMer
Strady, Emilie; Kervella, Stephane; Blanc, Gerard; Robert, Serge; Stanisiere, Jean-yves; Coynel, Alexandra; Schaefer, Joerg.
Sediments quality assessment is of priority concern to provide a comprehensible overview of ecological and chemical state of an ecosystem. The Marennes-Oleron Bay, hosting the largest oyster production in France, is influenced by the historic polymetallic pollution of the Gironde Estuary. Despite, management efforts and decreasing emissions in the Gironde watershed, Cd levels in oysters from the bay are close to consumption limit (5 pig g(-1) dw. EC no. 466/2001). In this context, the aim of the study was to assess the priority metal (Ni, Cu, Zn, As, Ag, Cd, Hg, Pb and Th) concentrations in sediment within the Bay, by investigating spatial and temporal distribution variations and the role of hydrodynamic forcing. For that we selected three sites (east,...
Tipo: Text Palavras-chave: Trace metal; Marennes Oleron Bay; Enrichment factor; Sediment; Hydrodynamic; Altus.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00038/14914/15996.pdf
Imagem não selecionada

Imprime registro no formato completo
Summer mortality of Crassostrea gigas (Thunberg) in relation to environmental rearing conditions ArchiMer
Soletchnik, Patrick; Lambert, Christian; Costil, Katherine.
The purpose of this study is to investigate summer mortality of the cupped oyster, Crassostrea gigas, in relation to culture practices in the traditional oyster production region of Marennes-Oleron (France). Four oyster rearing conditions, varying culture location ("on-" or "off-bottom"), and site depth (65% to 80% daily immersion termed "deep" or 45% to 65%, termed "shallow") were studied to compare biologic performance and maturation status of oysters, in relation to sediment and water column parameters. The most severe mortality occurred in June to July in "on-bottom" reared oysters (25%), as compared with 10% mortality in "off-bottom" cultured oysters. Oysters (shell and meat) grew significantly better when reared "off-bottom" than "on-bottom."...
Tipo: Text Palavras-chave: Summer mortality; Hydrology; Sediment; Marine ecosystem; Marennes Oleron Bay; Crassostrea gigas.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-3171.pdf
Imagem não selecionada

Imprime registro no formato completo
Summer mortality of the Pacific cupped oyster Crassostrea gigas in the Bay of Marennes-Oleron (France). Spatial variability of environmental parameters, growth and production rates using a Geographical Information System (GIS) ArchiMer
Soletchnik, Patrick; Le Moine, Olivier; Razet, Daniel; Geairon, Philippe; Faury, Nicole; Goulletquer, Philippe; Robert, Stephane.
The Marennes-Oleron Bay is the first rearing area in Europe for the cupped oyster, with 35 000 tons proudced on a yearly basis. This species has suffered several chronic summer mortalities for the last 10 years.
Tipo: Text Palavras-chave: Marennes Oleron Bay; Geogaphical Information System; GIS; Production; Growth; Crassostrea gigas; Oysters; Summer mortality.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/acte-3376.pdf
Imagem não selecionada

Imprime registro no formato completo
Use of an ecosystem model for the assessment of the influence of cultivated oysters (Crassostrea gigas) on the nitrogen cycling in the Marennes-Oleron Bay ArchiMer
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
Registros recuperados: 16
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional