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| Registros recuperados: 36 | |
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| Allen, G.; D'Ozouville, Laurent; L'Yavanc, Jacky. |
| The Aber Benoît, a small estuary on the North West coast of Brittany was polluted by oil from the Amoco Cadiz oil spill. Preliminary results from water and sediment samples taken in the estuary in May 1978, show that two months after the initial spill, high concentrations of hydrocarbures existed in the water and sediments of the estuary. The Aber Benoît shows a well developed salt wedge and upstream increasing suspended sediment concentrations. Oil was dispersed more or less evenly throughout the water column, in the entire length of the estuary. In the bottom sediments, oil had accumulated to depths of 30 cm. Sand bars appear to induce a trapping of oil in the estuary channel. |
| Tipo: Text |
Palavras-chave: Estuaire; Sédiment; Pollution Hydrocarbures; Estuary; Sediment; Oil spill. |
| Ano: 1978 |
URL: http://archimer.ifremer.fr/doc/00306/41721/40932.pdf |
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| Cabrita, Mt; Catarino, F; Vale, C. |
| The time-course evolution of ammonium concentration has been examined in the flood water during the first 25 min of tidal inundation. The way this transport fluctuates with the tidal ranges and wind conditions was investigated. Flood water was collected at three sites, located along a transect from the lower to the upper intertidal area of the Tagus estuary. At spring and intermediate tides, the periods of air exposure vary slightly along the transect due to the high tidal amplitude and the flatness of the area, but the upper site remains uncovered at neap tide over the entire tidal cycle. At each site, sampling was performed at different tidal ranges covering the neap-spring tidal cycle and wind conditions. Ammonium was determined in the flood water at... |
| Tipo: Text |
Palavras-chave: Extraction par la marée; Ammonium; Sédiment intertidal; Estuaire; Tidal flushing; Ammonium; Intertidal sediments; Estuary. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00325/43611/43908.pdf |
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| Guerault, Daniel; Desaunay, Yves; Bellois, Pierre; Grellier, Patrick; Robin, Jean-paul; Robineau, Brigitte. |
| A survey of the glass-eel fishery in the Loire estuary in 1987 (265 boats, 117 tons gasseel, 13733 fishing trips) showed that 16 fishery species constitute the by-catch (49,3 million individuals, mainly juveniles, among which 98 % consist in flounder, sprat and brown shrimp). The analysis of catches in space and time leads to proposaIs for Iimiting the impact during the last fishing weeks. Taking into account the naturai mortality rates of the concerned juveniles, an attempt is made to estimate the actuai impact of the glasseel fishery, after a delay. Only 10 % of the caught brown shrimps wouid have been recruited in the summer shrimp fishery. Up to 85,5 to 97,6 % of juvenile fishes would have disappeared during the following year by natural mortality. |
| Tipo: Text |
Palavras-chave: Anguille; Pêcherie; Prises accessoires; Estuaire; Loire; Eel; Fishery; By catch; Estuary; Loire. |
| Ano: 1989 |
URL: http://archimer.ifremer.fr/doc/00120/23102/20951.pdf |
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| Masson, Daniel; Faury, Nicole; Ratiskol, Jacqueline. |
| Le bassin de Marennes Oléron, comme toutes les zones conchylicoles, est susceptible d'être touché par les apports pollués. Dans ce domaine, le vecteur potentiel que constitue la Charente méritait d'être étudié plus particulièrement, la qualité bactériologique des eaux pouvant affecter par la suite la salubrité des coquillages. L'étude précédente (Masson et al. 1988) a fait apparaître que la pollution bactérienne apportée par la Charente (particulièrement en étiage) sédimentait rapidement, la quantité de germes devenant très faible à la sortie de l'estuaire. Toutefois, comme l'enjeu économique est important (perspectives européennes) il était nécessaire de confirmer ce résultat avec un système de suivi identique à celui utilisé en 1987. De plus, un certain... |
| Tipo: Text |
Palavras-chave: Bactériologie; Qualité eaux; Salubrité coquillages; Pollution bactérienne; Estuaire; Charente; Charente Maritime Dep.. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/00087/19827/17469.pdf |
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| Pougnet, F.; Blanc, G; Mulamba-guilhemat, E.; Coynel, A.; Gil-diaz, T.; Bossy, C.; Strady, E.; Schäfer, J.. |
| Despite major management efforts initiated in 1987 and 2007 and decreasing emissions in the Gironde watershed, cadmium (Cd) levels in oysters from the downstream Gironde estuary are still higher to the consumption limit (5 mg/kg, dw, EC). Dissolved Cd concentrations were measured in surface water collected in the Gironde estuary during nine cruises (2014 – 2015). The obtained theoretical (Cdd0) concentrations and the daily net Cdd fluxes, using the Boyle’s method, confirm a decadal stepping decrease of the Cd pollution corresponding to that observed in the oysters from the long term national monitoring for priority contaminants at the estuary mouth. As this observation invalidates the previous estimating methods for estimating annual net Cdd fluxes, we... |
| Tipo: Text |
Palavras-chave: Estuaire; Cadmium dissous; Modélisation; Flux nets; Estuary; Dissolved cadmium; Computation; Net fluxes. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00485/59713/62808.pdf |
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| Morin, Jocelyne; Riou, Philippe; Bessineton, Christophe; Vedieu, Christophe; Lemoine, Michel; Simon, Serge; Le Pape, Olivier. |
| This study, carried out from 1995 to 1997, within the framework of "Le Havre" harbour extension project, concerned halieutic populations and the characterization of a coastal nursery in the oriental part of the Seine bay and the Seine estuary . The main objective was to describe the specific and demographic composition of marine populations and their spatio-temporal distribution, and so assess the biological and halieutic role of this area. This study also included a research about the dietary needs of fish juveniles living in the estuary. Autumn and winter surveys results show that the estuary and area under direct influence are the richest from a biological and halieutic point of view. The mouth estuary isthe richest area in terms of diversity of... |
| Tipo: Text |
Palavras-chave: Bay of Seine; Estuary; Food; Trophic; Juvenile; Nursery; Baie de Seine; Estuaire; Alimentation; Trophique; Juvénile; Nourricerie. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/rapport-1507.pdf |
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| Dufour, P.; Cremoux, Jl.; Slepoukha, M.. |
| "In vitro" enrichment experiments on natural populations have been used to determine the nutrients controlling the potential biomass of phytoplancton in the Ebrié coastal lagoon. The limiting nutrients were generally nitrogen, phosphorus and carbon, in this order ; in three cases out of eleven, P and N act simultaneously ; in an extreme eutrophication case, N, P and C were all limiting. No effect was observed following addition of metals, vitamins or chelators. The limitations deduced from the enrichment experiments show a. good agreement with the elementary composition of the external medium ; in waters potentially limited by N alone, the dissolved inorganic nutrients have a N : P ratio lower than 25. The agreement is poorer when the sestonic N : P ratio... |
| Tipo: Text |
Palavras-chave: Lagune; Estuaire; Zone tropicale; Phytoplancton; Biomasse; Eléments limitants; Tests biologiques; Composition chimique; Coastal lagoon; Estuary tropical zone; Phytoplankton; Biomass; Limiting nutrients; Bioassay; Chemlcal composition. |
| Ano: 1979 |
URL: http://archimer.ifremer.fr/doc/00306/41689/40898.pdf |
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| Gailhard, Isabelle. |
| Estuaries are areas which, from their structure, their fonctioning, and their localisation, are subject to significant contribution of nutrients. One of the objectif of the RNO, the French network for coastal water quality monitoring, is to assess the levels and trends of nutrient concentrations in estuaries. A linear model was used in order to describe and to explain the total dissolved nitrogen concentration evolution in the three most important estuaries on the Chanel-Atlantic front (Seine, Loire and Gironde). As a first step, the selection of a reliable data set was performed. Then total dissolved nitrogen evolution schemes in estuary environment were graphically studied, and allowed a resonable choice of covariables. The salinity played a major role... |
| Tipo: Text |
Palavras-chave: Nutriments; Estuaire; Loire; Seine; Gironde; Schéma de dilution; Modèle linéaire; Tendance; Nutrients; Estuary; Seine; Loire; Gironde; Dilution schema; Linear mode1; Trend. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00079/19070/16665.pdf |
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| Registros recuperados: 36 | |
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