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Registros recuperados: 12
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Agriculture, conchyliculture et circulation des eaux de surface : état actuel des recherches ArchiMer
Chevallier, Claude; Masson, Daniel.
La qualité des eaux de surface constitue périodiquement un sujet de controverse et de polémiques entre professionnels agricoles et conchylicoles charentais. Le débat reste centré sur la valorisation agricole des zones de marais littoraux. La création croissante d'îlots de culture drainés, souvent à proximité immédiate des zones conchylicoles, suscite l'inquiétude quant à la qualité des eaux d'aval. Il nous a paru nécessaire d'établir un état succinct des connaissances en la matière afin d'éviter l'usage d'arguments parfois irrationnels et de favoriser le dialogue entre les partenaires ; mais il nous paraît tout aussi important de montrer que la qualité des eaux de surface, question essentielle pour l'aménagement régional dépasse le seul cadre des marais :...
Tipo: Text Palavras-chave: Conchyliculture; Circulation des eaux; Effluent d'élevage; Charente-Maritime; Agriculture; Eau; Engrais.
Ano: 1988 URL: http://archimer.ifremer.fr/doc/00015/12664/9553.pdf
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Apports et distribution des résidus organochlorés à haut poids moléculaire dans la rade de Brest (milieu marin semi-fermé) ArchiMer
Marchand, Michel; Caprais, Jean-claude; Cossonmannevy, Ma; Moriniere, P.
The aim of this work is to study the input, transfer and distribution processes of chlorinated insecticides (lindane, DDT) and PCB residues in a semi-closed coastal marine environment. Measurements are made in sea water, rain water and sediment samples. Distribution coefficients between sea water and sediment are determined for several organochlorine insecticide and PCB compounds. The results show an important transfer of chlorinated residues from the atmosphere to the marine environment. The highest residue levels in the sediments are observed near other urban and industrial pollution sources. Analyses of mussels show that this mollusc can be used as a biological indicator of sea water pollution. Concentration factors are determined for lindane,...
Tipo: Text Palavras-chave: Organochlorés; Eau; Sédiments; Matière vivante; Rade de Brest; Organochlorine; Water; Sediments; Biota; Rade de Brest.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/00114/22481/20162.pdf
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Etude preliminaire des equilibres de distribution de l'eau et des ions au cours de l'ovogenese de Solea solea ArchiMer
Gallis, J; Lemenn, F; Lebrun, A; Nunez, R.
During oogenesis of Solea solea L., gonadal changes in water, Na super(+) and K super(+) ions seem to be related to yolk protein incorporation by the oocyte. The decrease in oocyte water accumulation, associated with an increase in pericellular water accumluation and a decrease in K super(+) concentration occurs when vitellogenin enters the oocyte. Na super(+) concentration decreases in the oocyte at the end of the exogenous vitellogenesis when the first stages of the oocyte maturation take place. Water accumulation in the pericellular space during vitellogenesis allows the rapid transfer of water from this compartment into the oocyte during the terminal phase of maturation. However the total amount of gonadal water remains stable.
Tipo: Text Palavras-chave: Solea solea; Soleidae; Pisces; Hydration; Water content; Ion accumulation; Sexual maturity; Ovaries; Oogenesis; Solea; Maturation ovocytaire; Ovogenèse; Eau; Ions.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1231.pdf
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Évaluation monétaire des services écosystémiques. Un exemple d’usage dans la mise en place d’une politique de l’eau en France ArchiMer
Feuillette, Sarah; Levrel, Harold; Blanquart, Stéphanie; Gorin, Olivier; Monaco, Guillaume; Penisson, Bruno; Robichon, Stéphane.
In the context of the Water Framework Directive, the French Water Agencies were asked to justify exemptions, for disproportionate cost reasons, to the “good water” status in a series of river basins in 2015. The ministry of the Environment and the economists of the Water Agencies agreed on the fact that this justification would be based on cost-benefit analyses. A great number of cost-benefit analyses were carried out on water bodies or groups of water bodies. This article reports on this experience conducted by the French Water Agencies. It highlights the fact that the large majority of restoration projects generated higher costs than benefits. It suggests that the implementation of the Water Framework Directive could be considerably limited by the use of...
Tipo: Text Palavras-chave: Environnement; Dispositifs institutionnels; Eau; Évaluation économique; Coûts disproportionnés; Environment; Institutional systems; Water; Economic valuation; Disproportionate costs.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00480/59158/61787.pdf
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Impact de l'aquaculture marine sur l'environnement : aspects juridiques et économiques ArchiMer
Paquotte, Philippe.
Aquaculture is an economic activity which is characterised by a great dependence on environmental conditions. Therefore aquaculture development is subdued to institutional context which defines the rules for use and conservation of the environment. This paper analyses the impact of marine environment regulations on economic operating of aquaculture enterprises and on industrial dynamics. Because aquaculture enterprises use a collective good, an economic approach of aquaculture has to take into account not only the relations between enterprises and environment, but also the relations between the enterprises themselves, through production externalities. In this study, several economic tools are considered in order to incite enterprises to integrate pad of...
Tipo: Text Palavras-chave: Sustainability; Development policies; Fiscal policies; Regulations; Environmental protection; Water; Environmental impact; Marine environment; Aquaculture; SEM; Durabilité; Politique de développement; Politique fiscale; Réglementation; Protection de l'environnement; Eau; Impact sur l'environnement; Milieu marin; Aquaculture.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/publication-4018.pdf
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le Bulletin du Réseau de Suivi Lagunaire Languedoc-Roussillon. Bilan des résultats 2006 et nature du suivi 2007 ArchiMer
Tipo: Text Palavras-chave: Réseau de Suivi lagunaire; Lagune; Eutrophisation; Bilan; Résultat; Programme; Suivi; Qualité; Eau.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/00319/43008/42524.pdf
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L'utilisation des échantillonneurs passifs. Une nouvelle méthode pour évaluer la contamination chimique des masses d'eau ArchiMer
Gourlay, Catherine; Gonzalez, Jean-louis.
The Water European Framework Directive requires the implementation of programs to monitor the chemical quality of water bodies (freshwater, transition water and seawater), based on grab measurements of concentrations of various contaminants (metals, organic compounds). The results are limited by several analytical difficulties, and the poor representativity because of the temporal variability of contamination. The passive sampling techniques, which basically consist of concentrating substances on a submerged device for a given period, and analyzing accumulated substances, should improve the monitoring, by simplifying analytical issues (lower detection limits, analysis in a simpler matrix), and allowing time integration of the contamination. Here, we...
Tipo: Text Palavras-chave: Échantillonneurs passifs; Eau; Membrane semi-perméable (SPMD); Gradient de diffusion en couche mince (DGT); Métaux; HAP; Passive samplers; Water; Semipermeable membrane device (SPMD); Diffusive gradient in thin film (DGT); Metals; PAHs.
Ano: 2010 URL: https://archimer.ifremer.fr/doc/00077/18850/16423.pdf
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Méthodologie de détermination d'un facteur de bioaccumulation (BAF) sur les mollusques en milieu marin. BAF opérationnel déterminé dans le contexte DCE ArchiMer
Amouroux, Isabelle; Sire, Alizee.
Suite à une étude conduite en 2015 par la cellule d’Analyse du Risque Chimique (ARC) en milieu marin en collaboration avec le Réseau d’Observation de la Contamination Chimique (ROCCH), 23 Valeurs Guides Environnementales (VGE) ont été déterminées pour les mollusques en alternative aux Normes de Qualités Environnementales (NQE) eau définies dans la DCE 2013/39/UE. Le passage d’une valeur à l’autre nécessite l’emploi de facteurs de conversion : facteur de bioaccumulation (BAF) et/ou facteur de bioconcentration (BCF). De façon préférentielle et selon le Technical Guidance for Deriving Environmental Quality Standards (EC, 2011), ce sont les valeurs de BAF déterminées sur le terrain qui doivent être prioritairement utilisées ; à défaut les valeurs de BCF seront...
Tipo: Text Palavras-chave: Facteur de bioaccumulation (BAF); Directive cadre sur l’eau; Eau; Mollusques; Moules; Valeurs Guides Environnementales (VGE); Milieu marin..
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00405/51667/52216.pdf
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Recommandations pour garantir la qualité des données de surveillance par échantillonnage passif. Outils émergents ArchiMer
Ghestem, J-p; Togola, A; Lardy-fontan, S; Guigues, N; Tixier, C; Larose, A; Miège, C.
The report prepared up within the AQUAREF program for 2015 provides recommendations to ensure the quality of passive sampling monitoring data. This type of sampling method could in the future be used in regulatory monitoring, and it seems necessary to prepare the tools, procedure that will be able to ensure the reliability of such data. The report first proposes an organization of the chain of responsibilities between: * the customer, * a pilot in charge of contacts with customer, sampling operations and of the the final report * and the laboratory which would be in charge of the analytical part on the passive sampling tool transmitted by the pilot. This organization is considered as an example. Other organizations are possible, provided they specify the...
Tipo: Text Palavras-chave: Échantillonnage passif; Contrôles qualité; Eau; Échange de données; Passive sampling; Quality control; Water; Data exchange.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00619/73077/72216.pdf
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Réseau de Suivi Lagunaire Languedoc-Roussillon. Bilan des résultats 2007 et programme 2008 ArchiMer
Tipo: Text Palavras-chave: Réseau de Suivi lagunaire; Lagune; Eutrophisation; Bilan; Résultat; Programme; Suivi; Qualité; Eau.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/00319/43009/42525.pdf
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Réseau de Suivi Lagunaire Languedoc-Roussillon. Bilan des résultats 2008 et programme 2009 ArchiMer
Face à l’enjeu eutrophisation, le Réseau de Suivi Lagunaire (RSL) a été créé par la Région Languedoc-Roussillon, l’Agence de l’Eau Rhône-Méditerranée & Corse, l’Ifremer et le Cépralmar. Cet outil de suivi permet de diagnostiquer l’état des lagunes régionales vis-à-vis de l’eutrophisation et ainsi d’initier la mise en place d’actions et de mesures de gestion. Le suivi, commun à l'ensemble des lagunes de la région, permet de comparer annuellement l’état des lagunes. Il comprend : un diagnostic annuel de la colonne d’eau sur les mois d’été ; un diagnostic simplifié des macrophytes à un rythme pluriannuel (tous les 3 ans) ; un diagnostic complet de l’eutrophisation qui suit tous les 6 ans, en plus des deux compartiments précédents, l’état du...
Tipo: Text Palavras-chave: Réseau de Suivi lagunaire; Lagune; Eutrophisation; Bilan; Résultat; Programme; Suivi; Qualité; Eau.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00319/43007/42523.pdf
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Water ratio effect on the proteins hydrolysis tongue sole by-products (Cynoglossus senegalensis) ArchiMer
Sylla, K. S. B.; Musabyemariya, B.; Berge, Jean-pascal; Seydi, Mg.
In this study the effectiveness of four different water ratio to hydrolyze sole by-products by using Protamex® were compared. Average proteins yields and degree of hydrolysis (DH %) of different hydrolysates were measured, and their peptide profiles were analysed by using gel filtration chromatography. It was found that by changing the hydrolysis conditions it was possible to produce hydrolysates with the same proportion of proteins (60%) and very different in peptide composition (from 294 to 13700 Da).
Tipo: Text Palavras-chave: Coproduits; Eau; Hydrolyse enzymatique; Protéines; By-products; Water; Enzymatic hydrolysis; Proteins.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/00015/12620/9505.pdf
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