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Registros recuperados: 11
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An example of GIS potentiality for coastal zone management: preselection of submerged oyster culture areas near Marennes-Oleron (France) ArchiMer
Durand, H.; Guillaumont, Brigitte; Loarer, Ronan; Loubersac, Lionel; Heral, Maurice; Prou, Jean.
The Charente Maritime coast, in central western France, is the most important area for oyster and mussel production in Europe. High density, in this restricted intertidal area, induces low growing rate and socio-economic difficulties. One of the possible solutions is to shift some oysters from intertidal area to submerged areas. Bathymetry, sedimentology, hydrodynamism, fisheries and administrative rules are some conditions which are considered to establish the better selection of potential zone. The successive steps of setting up the prototype of GIS are presented: digitized traditional data from charts, extracted data from grid models (hydrodynmaic model), merging of thematic covers, proposal of favorable areas. The results are discussed especially on...
Tipo: Text Palavras-chave: GIS; Modelisation; Bathymetry; Sedimentology; Hydrodynamism; Marennes Oleron.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00017/12784/9725.pdf
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Ecophysiologie - Modélisation – Génétique. Quel dialogue possible pour le contrôle de la qualité ? National Institute of Agronomic Research
Bertin, Nadia.
Tipo: Other Palavras-chave: Fruit quality; Ecophysiologie; Modelisation; Genetics; Size; Weight; Quality control; Fruit; Qualité du fruit; Écophysiologie; Modélisation; Génétique; Taille; Poids; Contrôle de la qualité; Fruit.
Ano: 2004 URL: http://hdl.handle.net/2174/320
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Emergence of biodiversity research and main progress from Ifremer ArchiMer
Desbruyeres, Daniel; Goulletquer, Philippe.
Research needs and interests on biodiversity have drastically increased since the Rio Conference (1992). The main conclusions from the Millennium Ecosystem Assessment (MEA, 2001) carried out by the UN and the demonstration of the critical role of biodiversity in maintaining ecosystems services have strengthened research interests on biodiversity. Moreover, the systemic approach generalization, complex system modeling, confluence of thematic prompting new scientific concepts, and multi-scalar – multifunctional approach have induced significant changes to the scientific context. A review of major advances on biodiversity monitoring and research resulting from Ifremer programs will be presented considering deep sea as well as coastal ecosystems and associated...
Tipo: Text Palavras-chave: Modelisation; Operational monitoring; Benthic habitat mapping; Ecosystem; Research; Marine biodiversity; Modélisation; Surveillance opérationnelle; Cartographie; Ecosystèmes; Recherche; Biodiversité marine.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/acte-6829.pdf
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Etude des apports en herbicides et en nutriments par la Charente : Modélisation de la dispersion de l'atrazine dans le bassin de Marennes-Oléron ArchiMer
Munaron, Dominique.
Our study aims at making progress the estimate of herbicide and nutrient inputs to the Marennes-Oleron bay which could influence summer oysters mortalities, and to bring by modeling a better understanding of the dynamics of these compounds in the shellfish-farming area. The development of a strategy adapted to the Charente river and its estuary reveals that agricultural activity on the catchment area is omnipresent, as well on the level of the nitrogen and herbicides contributions. It is thus necessary to specify Charente fluxes, which is the main tributary of the Marennes-Oleron bay, in order to better characterize its impact on shellfishfarming activity. Use of a dispersion model will constitute an invaluable help in the risk assessment with respect to...
Tipo: Text Palavras-chave: Atlantic coast; Marennes Oléron Bay; Modelisation; Estuary; Geochemistry behaviour; Charente River; Flux; Nutrient; Herbicide; Littoral Atlantique; Bassin de Marennes Oléron; Modélisation; Estuaire; Comportement Géochimique; Charente; Flux; Nutriments; Herbicides.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/these-2266.pdf
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Modèle énergétique uniboite de la croissance des huîtres (Crassostrea gigas) dans le bassin de Marennes-Oléron ArchiMer
Bacher, Cedric; Heral, Maurice; Deslous-paoli, Jean-marc; Razet, Daniel.
The growth of oysters (Crassostrea gigas) is modeled in order to study the trophic capacity of the Bay of Marennes Oléron. Total seston and amount of protids, lipids, and carbohydrates converted to energy are the environmental factors taken into account. Time series of these variables are derived during 2 yr with a daily time step from a linear regression including the tidal velocity, the height of the water column, and the wind velocity. A model of the energetic budget based on assimilation and respiration terms and depending on the previous time series is run to simulate the individual growth of an oyster. The knowledge of the number of oysters, the flow of water entering the bay, and the volume of the bay allows us then to estimate that 7% of the...
Tipo: Text Palavras-chave: Marennes Oléron; Crassostrea gigas; Huîtres; Croissance; Modélisation; Marennes Oleron bay; Crassostrea gigas; Oysters; Growth; Modelisation.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/1991/publication-3051.pdf
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Modélisation des turbidités en Bretagne sud et validation par des mesures in situ ArchiMer
Tessier, Caroline; Le Hir, Pierre; Dumas, Franck; Jourdin, F.
A hydrodynamic and sediment model of South Brittany is calibrated with ADCP measurements, which allow to estimate hydrodynamic forcing and concentration of suspended particulate matter. The exercise of comparison between observed and simulated concentrations reveals that turbidity is highly dependant on numerous strongly coupled sedimentary and physical processes.
Tipo: Text Palavras-chave: Waves; ADCP; Acoustical backscattering; Modelisation; Turbidity; Vagues; ADCP; Rétrodiffusion acoustique; Modélisation; Turbidité.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6300.pdf
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Modelisation morphodynamique de l'embouchure de la seine ArchiMer
Waeles, Benoit.
The mouth of the Seine has been undergoing intense morphological changes for decades, because of containment work to improve access to the ports of Rouen and Le Havre. A significant trend is the progradation of the downstream estuary. Simultaneously, the surface area of the intertidal mudflats tends to decrease. The estuary's sediments are composed of silt and fine sand (respectively transported from the river Seine and the open sea). Their distribution is linked to the hydrodynamic characteristics of the estuary and may display layered vertical structures. To understand the estuary's morphological changes, a morphodynamic ditigal model is developed from a validated (3D) model of silty sediment transport. A model of suspended fine sand transport as well as...
Tipo: Text Palavras-chave: Seine estuary; Modelling; Sediment transport; Hydrodynamic; Morphodynamic; Seine estuaire; Modelisation; Transport sediment; Hydrodynamique; Morphodynamique.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/these-2195.pdf
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Modelisation of oyster shell growth at 3 stations in the Patuxent river (Chesapeake Bay) ArchiMer
Prou, Jean; Goulletquer, Philippe; Bacher, Cedric.
In oyster production area the determination of the stock, estimation of mortality and growth rates are determinant for knowledge of the fishery. Growth models can be used to predict the time to reach marketable size (76 mm in Chesapeake Bay). They are also important in term of management, when they can predict the future value of the stock (Askew, 1978). Oyster growth models can be built by analysing growth of natural oysters but absolute age is orten unknown. Many authors report growth data in Chesapeake Bay for suspended oyster culture. Unfortunalely, modelisation of the growth was not developed. In that study oyster, shell growth models have been established at three stations in the Patuxent river. Seasonal eITects on growth were integrated in the model
Tipo: Text Palavras-chave: Modelisation; Oysters; Crassostrea virginica; Growth; Chesapeake Bay.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00200/31109/29512.pdf
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Rapport final projet Liteau II. Modélisation intégrée des transferts de nutriments depuis les bassins versants de la Seine, la Somme et l'Escaut jusqu'en Manche-Mer du Nord ArchiMer
Lefebvre, Alain.
The main aim of the project was to produce quantitative assessment elements on past and future consequences of nutrient inputs from French and Belgian coastal rivers (Seine, Somme, Escaut) with regards to eutrophication status in the English Channel – North Sea. This project will reinforce implementation of the Water Framework Directive (2000/60/CE), in the context of the 2.1. axis (Definition of ecological status) from APR LITEAU II. This project implements and generalizes to the whole eastern English Channel and the southern bight of the North Sea the results from LITEAU I Programme which allowed the development of this application on the Seine watershed and the Baie de Seine estuary. The method consists in : (i) the simulating the Nitrogen, the...
Tipo: Text Palavras-chave: OSPAR; WFD; Watershed – coastal zone continuum; Modelisation; Eutrophication; Southern bight of the North Sea; English Channel; OSPAR; DCE; Continuum bassin versant – zone côtière; Modélisation; Eutrophisation; Baie sud de la Mer du Nord; Manche.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/rapport-6298.pdf
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Testage de souches d'huîtres plates Ostrea edulis tolérantes à Bonamia ostreae: élevage contrôlé, écophysiologie et modélisation de la croissance ArchiMer
Haure, Joel.
Since the 1960's, breeding of the flat oyster Ostrea edulis has been under threat from two protozoan parasites, one of which is Bonamia ostrea. Several attempts have been made to introduce flat oysters of the Ostrea genus on the French coast, without much success. The IFREMER genetics laboratory. at Ronce les Bains has used selective pressure with Bonamia ostrea to obtain bonamiosis-resistant strains of the flat oyster, Ostrea edulis. The growth and physiology of these animaIs was studied in an intensive breeding system in which the algae Skeletonema costatum was used as fodder. The growth performance of the tolerant animals was compared with that of non-selected controls over a period of three years (1994,1995,1996). An analysis of the results showed the...
Tipo: Text Palavras-chave: Ostrea edulis; Skeletonema costatum; Ecophysiologie; Modélisation; Elevage intensif; Bonamia ostreae; Ostrea edulis; Skeletonema costatum; Ecophysiology; Modelisation; Intensive culture; Bonamia ostreae.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00108/21961/19555.pdf
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Typologie fonctionnelle des maladies et ravageurs des principales cultures et modélisation des effets du changement climatique sur leur évolution à l’échelle du territoire français National Institute of Agronomic Research
Launay, Marie; Brisson, Nadine.
Tipo: Working Paper Palavras-chave: Ecology; Agronomy; Pest management; Modelling; Climatic change; Ecology; Agronomie; Ravageur; Modelisation; Changement climatique.
Ano: 2008 URL: http://hdl.handle.net/2174/181
Registros recuperados: 11
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