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| Registros recuperados: 341 | |
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| 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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| Le tixerant, Matthieu; Bonnin, Marie; Gourmelon, Françoise; Ragueneau, Olivier; Rouan, Mathias; Ly, Ibrahima; Ould zein, Ahmed; Ndiaye, Fatou; Diedhiou, Mohamed; Ndao, Souleye; Ndiaye, Mamadou Bassirou. |
| In the marine environment, positive law generates multiple zones and regulatory limits that overlap in space, justifying a cartographic representation as a relevant approach to promote understanding (synthetic vision), analysis (highlighting legal anomalies, inconsistencies and redundancies), dissemination and communication to different audiences (awareness-raising). The article presents a methodology leading to the mapping of marine and coastal environmental law in West Africa, using a geographic information base to produce static or interactive cartographic representations via a Geographic Data Infrastructure (GDI). It shows the contribution of this type of mapping to a transversal approach in a multi-activity, multi-sectoral and multi-scale context. A... |
| Tipo: Text |
Palavras-chave: Afrique de l’ouest; Mer; Littoral; Droit de la mer; Environnement; SIG; Cartographie; West Africa; Sea; Coastal zone; Law of the sea; Environment; GIS; Cartography. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00656/76813/81628.pdf |
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| Person, Roland; Aoustin, Yannick; Blandin, Jerome; Marvaldi, Jean; Rolin, Jean-francois. |
| For a long time, deep-sea investigation relied on autonomous bottom landers. Landers call vary in size from 200 kg weight to more than 2 t for the heaviest scientific landers and are used during exploration cruises oil medium periods, from one week to some months. Today, new requirements appear. Scientists want to understand in detail the phenomena outlined during exploration cruises, to elaborate a model for future forecasting. For this, it is necessary to deploy instrumentation at a precise location often for a long period. A new mode of ocean science investigation Using long-term seafloor observatories to obtain four dimensional data sets has appeared. Although this concept has been proposed for many years, the high level of investment required limits... |
| Tipo: Text |
Palavras-chave: Environment; Seismology; Global change; Multidisciplinary long term observatories; Landers. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-3604.pdf |
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| Fromentin, Jean-marc; Fonteneau, Alain; Restrepo, Victor. |
| During the last SCRS plenary meeting, the sub-committee on environment suggested to present a document on the ‘Ecosystem Approach to Fisheries’ (EAF). This document firstly recalls the general scientific and institutional background of EAF, then we propose a synoptic view of EAF, including four main domains: governance, exploitation, resources and impacts on ecosystems. The way that EAF is tackled within the various tuna commissions is then summarised. Finally, we rapidly examine the way the SCRS could cope with EAF issues and we suggest to merge the sub-committee on environment with this on by-catch into a single subcommittee on ecosystem. |
| Tipo: Text |
Palavras-chave: Ecosystem; Resources; Exploitation; Governance; Environment; By-catch. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/00192/30334/28809.pdf |
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| Gawel, Mj. |
| Guam consists of a single main island surrounded by shallow fringing coral reefs. The marine species and ecology of Guam's coral reefs have been studied extensively, especially through programs of the University of Guam's Marine Laboratory. In addition to overfishing and destructive fishing practices, the marine benthic communities of Guam have been damaged by major storm waves; loss of corals to crown of thorns starfish predation; damage by recreational swimmers, divers and watercraft operators; grounding of ships and pollutant discharges of sewage and of stormwater. But the most serious damage is due to accelerated siltation, sedimentation and turbidity due to erosion related to land use practices. Steps are being taken to protect Guam's coral reefs and... |
| Tipo: Text |
Palavras-chave: Récif; Protection; Benthique; Environnement; Guam; Reef; Protection; Benthic; Environment; Guam. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00325/43595/44036.pdf |
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| Henry, L. -a.; Stehmann, M. F. W.; De Clippele, L.; Findlay, H. S.; Golding, N.; Roberts, J. M.. |
| Highly localized concentrations of elasmobranch egg capsules of the deep-water skate Bathyraja richardsoni were discovered during the first remotely operated vehicle (ROV) survey of the Hebrides Terrace Seamount in the Rockall Trough, north-east Atlantic Ocean. Conductivity–temperature–depth profiling indicated that the eggs were bathed in a specific environmental niche of well-oxygenated waters between 4·20 and 4·55° C, and salinity 34·95–35·06, on a coarse to fine-grained sandy seabed on the seamount's eastern flank, whereas a second type of egg capsule (possibly belonging to the skate Dipturus sp.) was recorded exclusively amongst the reef-building stony coral Solenosmilia variabilis. The depths of both egg-laying habitats (1489–1580 m) provide a de... |
| Tipo: Text |
Palavras-chave: Deep sea; Elasmobranch; Environment; Habitat; Reproduction. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00344/45508/45061.pdf |
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| Kalaydjian, Regis; Girard, Sophie. |
| The "French Maritime Economic Data" report is periodically published by Ifremer since 1997. It presents an economic assessment of the French maritime activities, their position in the national economy and in the world competition, as well as the significance of non market public services. Maritime activities in the industrial sector are assessed using a standard metrics to facilitate the periodical update of the report: turnover, gross value added, employment, number of enterprises, exports. These indicators are expressed at national level. The public sector is described by annual budgets, number of staff and personnel costs, broken down into the different public policy functions. Regional indicators are provided on activities whenever relevant and... |
| Tipo: Text |
Palavras-chave: Economie; Concurrence; Croissance; Emploi; Environnement; Europe; France; Industrie; Marin; Maritime; Valeur ajoutée; Secteur public; Services.; Economy; Competition; Employment; Environment; Europe; France; Growth; Industry; Marine; Maritime; Public sector; Value added; Services.. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00388/49962/50614.pdf |
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| Bechemin, Christian; Soletchnik, Patrick; Polsenaere, Pierre; Le Moine, Olivier; Pernet, Fabrice; Protat, Martin; Fuhrmann, Marine; Quere, Claudie; Goulitquer, Sophie; Corporeau, Charlotte; Lapegue, Sylvie; Travers, Marie-agnes; Morga, Benjamin; Garrigues, Manon; Garcia, Celine; Haffner, Philippe; Dubreuil, Christine; Faury, Nicole; Baillon, Laury; Baud, Jean-pierre; Renault, Tristan. |
| Mass mortality outbreaks (90-100%) in both juvenile and adult blue mussels were reported in 2014 along the Pertuis Charentais area of the French Atlantic coast. A series of studies were carried out to learn more about the phenomenon through detecting pathogens, describing environmental conditions and establishing the physiological status of the animals. Bacteria identif ied as belonging to the V. splendidus species were detected in dying mussels and seem able to cause mortality in blue mussels in the laboratory. Unusual environmental conditions (large amounts of fresh water, re-suspension of sediments during a series of storms, and a high renewal rate of specific water masses in Brittany’s Pertuis area) may be partially responsible for sparking the phenomen |
| Tipo: Text |
Palavras-chave: Mortalités; Moules; Pertuis Charentais; Vibrio splendidus; Environnement; Mortality; Mussels; Pertuis Charentais; Vibrio splendidus; Environment. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00312/42343/41682.pdf |
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| Abi-khalil, Celina; Lopez-joven, Carmen; Abadie, Eric; Savar, Veronique; Amzil, Zouher; Laabir, Mohamed; Rolland, Jean-luc. |
| The multifactorial etiology of massive Crassostrea gigas summer mortalities results from complex interactions between oysters, opportunistic pathogens and environmental factors. In a field survey conducted in 2014 in the Mediterranean Thau Lagoon (France), we evidenced that the development of the toxic dinoflagellate Alexandrium catenella, which produces paralytic shellfish toxins (PSTs), was concomitant with the accumulation of PSTs in oyster flesh and the occurrence of C. gigas mortalities. In order to investigate the possible role of toxic algae in this complex disease, we experimentally infected C. gigas oyster juveniles with Vibrio tasmaniensis strain LGP32, a strain associated with oyster summer mortalities, after oysters were exposed to Alexandrium... |
| Tipo: Text |
Palavras-chave: Harmful algae; Environment; Interaction; Pathogens; Defense; Paralytic shellfish toxin. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00309/42016/41308.pdf |
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| Sarradin, Pierre-marie; Caprais, Jean-claude; Riso, Ricardo; Kerouel, Roger; Aminot, Alain. |
| Water samples were collected around the communities of a hydrothermal mussel, Bathymodiolus sp., in the Lucky Strike (1700 m depth) and Menez Gwen (850 m depth) areas, Mid Atlantic Ridge, and analysed for chemical constituents. The environment surrounding the organisms consists in sea water (88 to 100%) mixed with hydrothermal fluid with pH between 6.2 and 8, Sigma S (H2S + HS-) concentrations from 0 to 62 mu mol l(-1). High dissolved organic carbon (DOC) concentrations suggest a highly productive ecosystem. Production of ammonium and DOG, consumption of nitrate and sulfide in the vicinity of the organisms are among the environmental changes found in relation with local biological activity. Concentrations of Cu and Pb were high, implying that the organisms... |
| Tipo: Text |
Palavras-chave: Environment; Sea water; Hydrothermal vents; Mussels. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00147/25847/23968.pdf |
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| Hatt, Philippe-jacques; Stavrakakis, Christophe; Buchet, Vincent; Dupuy, Beatrice. |
| Le polder conchylicole de Bouin (Vendée) est le principal bassin français de production de naissains d’huîtres creuses issus d’écloseries. Depuis 2007, et malgré l’installation de dispositifs de traitement de l’eau, des anomalies dans les élevages voire des mortalités affectent la production des écloseries et nurseries du secteur, ainsi que celle de microalgues en grand volume d'une entreprise spécialisée. Les observations des professionnels orientent la recherche de la cause de ces mortalités sur les contaminants chimiques, notamment les pesticides utilisés par l'agriculture, dont les exploitations du polder agricole, qui jouxtent le polder conchylicole. Comme l'ont montré de nombreux travaux, certains de ces produits altèrent la qualité de l’eau de mer... |
| Tipo: Text |
Palavras-chave: Bassin Loire-Bretagne; Baie de Bourgneuf; Environnement; Conchyliculture; Qualité de l'eau; Pollution chimique; Bassin versant; Mortalité; Zone côtière; Loire-Bretagne district; Bourgneuf bay; Environment; Shellfish aquaculture; Water quality; Chemical pollution; Watershed; Mortality; Coastal zone. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00280/39165/37726.pdf |
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| Ky, Chin-long; Broustal, Floriane; Potin, Dan; Lo, Cedrik. |
| In French Polynesia, the P. margaritifera pearl aquaculture industry is spread over a vast area, as large as Europe. All the oysters for this the highly economically important activity are supplied from just a few collection lagoons, but they are grown in numerous sites across three archipelagos (Gambier, Society and Tuamotu). Many oyster transfers thus indirectly bring about grafting combinations mixing different geographic origins and production sites. This study aims to examine the impact of such graft combinations on cultured pearl quality traits. For this, six homogeneous and standardised experimental graft combinations (N = 6197) were conducted at commercial scale in the two growing locations the most frequently used in French Polynesia: Arutua atoll... |
| Tipo: Text |
Palavras-chave: Pearl oyster; Pinctada margaritifera; Graft combinations; Pearl quality traits; Environment. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00477/58888/61444.pdf |
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| Degremont, Lionel; Boudry, Pierre; Ropert, Michel; Samain, Jean-francois; Bedier, Edouard; Soletchnik, Patrick. |
| This study investigated the effects of age (first or second summer of life) and environment (three study sites on French coasts) on summer mortality in Crassostrea gigas, using three generations of oysters produced during the Morest project. For each generation, two groups of oysters, selected either as 'resistant' (R) or 'susceptible' (S) to summer mortality at the age of 6 months in Rivière d'Auray (RA, South Brittany), were evaluated. In Ronce (Marennes-Oléron Bay) and RA, R oysters had low mortality during their first and second summers, while mortality was higher during the second summer in Baie des Veys (BDV, Normandy). In RA, S oysters exhibited higher mortality during their first summer than during their second, while the opposite result was found... |
| Tipo: Text |
Palavras-chave: Summer mortality; Age; Environment; Genetic; Crassostrea gigas. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6972.pdf |
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| Muller-feuga, Arnaud. |
| Industrial potentialities related to biotechnology of microalgae are examined, highlighting a wide spectrum of applications which concern principally nutrition, health, environment and energy. The french situation of research on microalgae, especially at Ifremer, is assessed, showing that the main axis are fine chemistry, aquaculture, environment, bio-process engineering. It covers the majority of the applications, but leaves in shade certain important aspects such as human food and CO2 fixation. Concerning the general approach, some significant improvements can be expected from a more accurate control of bacteriological and genetic quality of cultures. About the industrial aspects, a national initiative seems in progress. The variety of potential... |
| Tipo: Text |
Palavras-chave: Process engineering; Energy; Environment; Health; Food; Aquaculture; Biotechnology; Microalgae; Génie des procédés; Energie; Environnement; Santé; Alimentation; Aquaculture; Biotechnologie; Microalgues. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/1997/rapport-1092.pdf |
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| Registros recuperados: 341 | |
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