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Registros recuperados: 38
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Approche multi-échelles de la cartographie des habitats benthiques des substrats meubles subtidaux : application à la frange côtière de Bretagne nord ArchiMer
Chevalier, Claire; Dutertre, Mickael; Hamon, Dominique; Ehrhold, Axel; Gentil, Franck; Thiebaut, Eric; Bajjouk, Touria.
Tipo: Text
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00281/39231/37791.pdf
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Approche sectorielle subtidale : Identification et caractérisation des habitats benthiques du secteur Glénan (Réseau de surveillance benthique - Région Bretagne) ArchiMer
Ehrhold, Axel; Blanchet, Aline; Hamon, Dominique.
Ifremer launched and coordinated the development of a strategy for the REBENT network (REseau BENThique) in 2000 to monitor the aftermath of the "Erika" oil spill in December 1999. Its aim is to provide consistent baseline knowledge about coastal benthic habitats and constitute a monitoring tool to detect changes at various scales over time and space. Sector-based seabed habitat mapping in shallow water (< 50 m deep), is currently being conducted throughout Brittany's coastal waters through a combination of geoacoustic marine systems and ground-truthing using biological grab sampling and seabed observations. Sedimentological and biological results on Glenan area emphasize a great diversity of subtidal habitats and marine species recognized. Sidescan...
Tipo: Text Palavras-chave: Haploops; Maerl; Bedforms; Bedload transport; Communities; Benthic macrofauna; Sidescan sonar; Habitats mapping; Glenan; Rebent; Haploops; Maërl; Figures sédimentaires; Dynamique sédimentaire; Peuplements; Macrofaune benthique; Sonar latéral; Cartographie d'habitats; Glénan; Rebent.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/rapport-2301.pdf
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Atlas thématique de l'environnement marin en baie de Saint-Brieuc (Côtes-d'Armor) ArchiMer
Augris, Claude; Hamon, Dominique.
This atlas presents in a synthetic form the hydrodynamical, geological and biological characteristics of one of the most studied region of the French littoral. Geologic and geophysical data of the Saint-Brieuc Bay show that the deep basement consists of pre-palaeozoic or palaeozoic sedimentary series in the centre of the Bay, whereas metamorphic and magmatic formations are dominant in coastal regions. The location of superficial sediments in the Bay, is mainly due to marine currents. A granulometric gradient, from very fine to coarse sediments, appears in two directions: from the coast towards the high sea, and from the west to the east. Rocky substrates disrupt the sediment distribution, with, most of the time, a concentration of coarse sediments near the...
Tipo: Text Palavras-chave: Atlas; Bathymetry; Bottom topography; Commercial species; Geomorphology; Hydrodynamics; Marine resources; Sediment analysis; Sedimentary basins; Zoobenthos.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00031/14246/11527.pdf
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Baie du mont saint-Michel - Etude écologique d'avant projet du site marémoteur du golfe normano-breton - Etude bio sédimentaire du secteur oriental de la baie ArchiMer
Guillaumont, Brigitte; Hamon, Dominique; D'Ozouville, Laurent.
Un des aspects de l'étude écologique d'avant-projet du site marémoteur du golfe normano-breton confié par EDF au CNEXO a consisté à identifier les peuplements benthiques de la zone intertidale de la baie du Mont-St-Michel. L'idée directrice a été de définir les différentes composantes faunistiques de la baie en fonction~ notamment la nature du substrat et du niveau bathymétrique. L'analyse des données bibliographiques a fait rapidement apparaître le manque de données biologiques dans la partie orientale de la baie, aussi l'étude a-t-elle été centrée sur ce secteur.
Tipo: Text
Ano: 1984 URL: http://archimer.ifremer.fr/doc/00004/11522/8103.pdf
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Bilan du suivi de l'exploitation industrielle de la crépidule en Bretagne Nord (baies de Saint-Brieuc et du Mont Saint-Michel) 2002-2005 ArchiMer
Blanchard, Michel; Hamon, Dominique.
The slipper-limpet (Crepidula fornicata) is a marine gastropod which causes serious perturbations in shellfish beds, because of spatial spreading and density rising. Along French coasts, in Northern Brittany, two bays are highly colonized : bay of Saint-Brieuc, centre for scallops fishery, and bay of Mont-Saint-Michel, a famous oyster-farming area, with a total limpet stock about 450 000 metric tons. The association AREVAL was founded in 2001 to manage there, an industrial collect of limpets by a succing-dredge, followed ashore by a treatment for calcareous soil improvement. The scientific survey, contracted to IFREMER, included measurements of long andshort-term dredge's effects on grounds and limpet population, and proposals to set up dredging...
Tipo: Text Palavras-chave: France; Western Channel; Bay of Mont Saint Michel; Bay of Saint Brieuc; Impact; Dredging; Treatment; Crepidula fornicata; Slipper limpet; Manche Ouest; Baie du Mont Saint Michel; Baie de Saint Brieuc; Impact; Dragage; Exploitation; Crepidula fornicata; Crépidule.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/rapport-6301.pdf
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Bionomie benthique subtidale en Baie de Douarnenez ArchiMer
Blanchet, Aline; Chevalier, Claire; Gaffet, Jean-dominique; Hamon, Dominique.
Following a preliminary mapping survey using a combination of acoustic techniques, spatial patterns of sedimentologic and biological characteristics of the Bay of Douarnenez were studied in 2001 from a series of grab samples and underwater video recording aiming at calibrate the acoustic facies of the bottom and at characterized them from a biological point of view. Results obtained from community structure analysis showed that four principal ecological groups dominate : The coarse sands community with Branchiostoma lanceolatum, Glycymeris glycymeris and Glycera lapidum, the fine to medium sand community with Nephtys cirrosa, Ophelia borealis and Gastrosaccus spinifer, the mixed muddy sand and gravel community with Amphiura filiformis, Edwardsia sp. and...
Tipo: Text Palavras-chave: Cartographie; Peuplements; Baie de Douamenez; Zoo-benthos; Analyses multivariées; Vidéo; Échinodermes.; Cartography; Comrnunities; Bay of Douamenez; Zoo-benthos; Multivariate analysis; Video; Echinodermata.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/00431/54254/56103.pdf
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Classification EUNIS, Système d’information européen sur la nature : Traduction française des habitats benthiques des Régions Atlantique et Méditerranée. Vol. 1. Habitats Littoraux ArchiMer
Bajjouk, Touria; Guillaumont, Brigitte; Michez, Noemie; Thouin, Benoît; Croguennec, Chantal; Populus, Jacques; Louvel-glaser, Justine; Gaudillat, Vincent; Chevalier, Claire; Tourolle, Julie; Hamon, Dominique.
Ce document est une traduction française que l’on espère transcrire au mieux les descriptions d’habitats de la classification EUNIS. Il vient compléter la traduction en français des habitats terrestres et d’eau douce réalisée par le MNHN‐SPN (Louvel et al., 2013). Il a pour objectif de faciliter l’appropriation de cette typologie par les acteurs concernés (scientifiques, gestionnaires ou bureaux d’études) et favoriser les échanges de connaissance sur la biodiversité des habitats benthiques en cohérence avec ce standard. Il s’agit dans ce document du dictionnaire de la typologie EUNIS dans sa version 2007, revue en 2012 pour des modifications des codes de la classification paléarctique et ceux de la classification des habitats marins de la Grande Bretagne....
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Ano: 2015 URL: http://archimer.ifremer.fr/doc/00271/38222/36382.pdf
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Classification EUNIS, Système d’information européen sur la nature : Traduction française des habitats benthiques des Régions Atlantique et Méditerranée. Vol. 2. Habitats subtidaux & complexes d’habitats ArchiMer
Bajjouk, Touria; Guillaumont, Brigitte; Michez, Noemie; Thouin, Benoît; Croguennec, Chantal; Populus, Jacques; Louvel-glaser, Justine; Gaudillat, Vincent; Chevalier, Claire; Tourolle, Julie; Hamon, Dominique.
Ce document est une traduction française que l’on espère transcrire au mieux les descriptions d’habitats de la classification EUNIS. Il vient compléter la traduction en français des habitats terrestres et d’eau douce réalisée par le MNHN‐SPN (Louvel et al., 2013). Il a pour objectif de faciliter l’appropriation de cette typologie par les acteurs concernés (scientifiques, gestionnaires ou bureaux d’études) et favoriser les échanges de connaissance sur la biodiversité des habitats benthiques en cohérence avec ce standard. Il s’agit dans ce document du dictionnaire de la typologie EUNIS dans sa version 2007, revue en 2012 pour des modifications des codes de la classification paléarctique et ceux de la classification des habitats marins de la Grande Bretagne....
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Ano: 2015 URL: http://archimer.ifremer.fr/doc/00271/38223/36383.pdf
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Directive Cadre sur l'Eau - Région Bretagne : Reconnaissance cartographique de bancs de maërl distribués dans les masses d'eaux côtières de référence. Convention Ifremer-Agence de l'Eau Loire-Bretagne. Volume 1, Rapport de synthèse, Volume 2, Résultats analytiques ArchiMer
Hamon, Dominique; Ehrhold, Axel; Houlgatte, Eric.
Tipo: Text
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00025/13664/10854.pdf
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Du sonar au microscope : les fonds marins auscultés aux abords du cap de Flamanville ArchiMer
Hamon, Dominique; Ehrhold, Axel; Chevalier, Claire; Caisey, Xavier; Gaffet, Jean-dominique; Alix, Anne-sophie.
Tipo: Text
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00064/17507/15021.pdf
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Dynamique de population de la crépidule (Crepidula fornicata) en baie de Saint-Brieuc (Manche-Ouest) ArchiMer
Blanchard, Michel; Blanchet, Aline; Gaffet, Jean-dominique; Hamon, Dominique.
The limpet (Crepidula fornicata), a gastropod mollusc belonging to the Calyptraeidae, native of the Atlantic coast of northern America, was introduced by accident on the French coasts in different steps (Blanchard, 1995, 1997). The most important, at the beginning of the 1970s, is linked to the massive importation of the Japanese oyster (Crassostrea gigas), in replacement of the Portuguese oyster (Crassostrea angulata), decimated by an epizooty. It is an opportunistic species proliferating in the neighbourhood of the main oyster basins of the English Channel and the Atlantic Ocean. Such is the case of the oyster culture areas of the Norman-Breton Gulf where stock assessments accounted for hundreds of thousands of tonnes of them (Hamon and Blanchard, 1994;...
Tipo: Text
Ano: 2001 URL: https://w3.ifremer.fr/archimer/doc/00000/5305/
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Environmental factors affecting maerl bed structure in Brittany (France) ArchiMer
Dutertre, Mickael; Grall, Jacques; Ehrhold, Axel; Hamon, Dominique.
This study used a large spatial scale approach in order to better quantify the relationships between maerl bed structure and a selection of potentially forcing physical factors. Data on maerl bed structure and morpho-sedimentary characteristics were obtained from recent oceanographic surveys using underwater video recording and grab sampling. Considering the difficulties in carrying out real-time monitoring of highly variable hydrodynamic and physicochemical factors, these were generated by three-dimensional numerical models with high spatial and temporal resolution. The BIOENV procedure indicated that variation in the percentage cover of thalli can best be explained (correlation = 0.76) by a combination of annual mean salinity, annual mean nitrate...
Tipo: Text Palavras-chave: Benthic habitats; Brittany; Environmental factors; Estuary; Large spatial scale; Maerl.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00280/39089/37816.pdf
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Estimation de biomasse des bivalves intertidaux (moule, coque) exploités en Baie de Saint - Brieuc (Manche Ouest) ArchiMer
Gros, Philippe; Hamon, Dominique.
The aim of this report is to provide total biomass estimates of the blue mussel (Mytilus edulis, M. galloprovincialis) livestock harvested on mussel beds, and of the cockle Cerastoderma edule in the Bay of Saint-Brieuc. The sampling scheme for reared mussels combines stratification and three-stage sampling. The biomass of mussels, estimated twice in a year, remains close to 3 500 metric tons of wet weight (coefficient of variation : 10 to 14 %). A nonrandom, systematic sampling was performed to estimate the total biomass of cockles, the data being processed according to the geostatistical methods the biomass of the stock exhibits seasonal variability : 4 800 tons (CV : 15 %) at the end of summer, vs. 3 700 tons (CV: 17 %) at the beginning of spring. The...
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Ano: 1989 URL: http://archimer.ifremer.fr/doc/00040/15152/12489.pdf
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Etat de la prolifération de la crépidule (Crepidula fornicata) en baie de Saint-Brieuc. ArchiMer
Hamon, Dominique; Blanchard, Michel.
The aim of this report is to provide an original method of mapping slipper limpet beds in the bay of Saint-Brieuc (Western Channel) by means of side scan sonar and submarine video. An evaluation of the biomass completes the distribution of limpets. The total fresh weight is about 250 000 tons
Tipo: Text Palavras-chave: Baie de Saint-Brieuc; Crepidula fornicala; Sonar latéral; Vidéo sous-marine; Cartographie; Biomasse; Bay of Saint-Brieuc. Crepidula fornicata; Side scan sonar; Submarine video; Cartographv; Biomass.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00107/21790/19365.pdf
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Etude de l'impact des engins de pêche trainants en zone cotière. Cas particulier du chalutage en Baie de Saint-Brieuc (Manche Ouest) ArchiMer
Hamon, Dominique; Berthou, Patrick; Fifas, Spyros.
Tipo: Text
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00392/50359/51060.pdf
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Etude de surveillance écologique sur le site de Flamanville année 1983 ArchiMer
Gentien, Patrick; Erard, Evelyne; Arnal, Olivier; Obaton, M; Quintin, Jean-yves; Belsher, Thomas; Chevalier, Claire; Dreves, Luc; Gresselin, Frederic; Guillaumont, Brigitte; Hamon, Dominique; Loarer, Ronan; Piriou, Jean-yves; Walker, Patrice.
In the framework of the building of a nuclear plant on the site of Flamanville, the C.N.E.X.O. was asked by Electricité de France, to take care of the ecological studies. These studies divide into three main phases: - Pilot studies, which are limited and aim to draw, initially, a portrait of the site. The Flamanville report was published in April 1976. - Project studies, which were spread over two years and resulted in the writing of a reference ecological assessment. These studies were carried out on the Flamanville site from July 1976 to July 1978 and the report was published in 1979. - Monitoring studies, which focus on the more significant or sensitive parameters of the site. This report presents the result of the first monitoring year (1983) and deals...
Tipo: Text
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/rapport-6465.pdf
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Étude dynamique de la population de Nucula nucleus (bivalve, protobranche) du cap de Flamanville (Manche) ArchiMer
Chardy, Pierre; Guillaumont, Brigitte; Hamon, Dominique.
Annual production and turnover rate of biomass are estimated on a population of the bivalve, Nucula nucleus, dominant on the sublittoral area of Cap de Flamanville (Manche). Investigations on reproductive cycle established on the gonads maturity index over one year indicate a single spawning period in autumn. Age is determined from a study of the ring pattern on the shells, in which annual signification is outlined. The Von Bertalanffy curve and the exponential function give an adequate description of growth and mortality. The studied population is considered as near a theoretical population with constant recruitment and mortality; this simplification is discussed through the comparison of the demographie structures obtained in the same station in 1978 and...
Tipo: Text Palavras-chave: Croissance; Mortalité; Productivité; Inférence statistique; Growth; Mortality; Productivity; Statistical inference.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/00113/22411/20108.pdf
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Etude écologique d'avant-projet sur le site de Flamanville ArchiMer
Belsher, Thomas; Hamon, Dominique; Jouan, Gérard; Cabioch, Louis; Retiere, Christian.
This report was written in the framework of the pilot studies aimed at drawing, within a few months, the main aspects of a possible installation site for a plant. Electricité de France made the National Centre for the Exploitation of Oceans (C.N.E.X.O.) responsible for an ecological study on the Flamanville site. This site is located on the west coast of Cotentin, about twenty kilometres from the Hague Cape.
Tipo: Text
Ano: 1976 URL: http://archimer.ifremer.fr/doc/1976/rapport-6404.pdf
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Etude Ecologique de Projet. Site de FLAMANVILLE. 2e cycle. Volume 2 : Le domaine benthique. ArchiMer
Chardy, Pierre; Belsher, Thomas; Guillaumont, Brigitte; Hamon, Dominique.
The first study year led to the broad definition of the site's phyto and zoobenthic inventory. The reference state thus obtained was then precised, for some selected sectors, by the monitoring and dynamic study of some populations.
Tipo: Text
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1979/rapport-6400.pdf
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Etude écologique du site Cotentin centre - Volume 2 : le domaine benthique intertidal - Volume 3 : Géomorphologie du Cotentin centre (fascicule cartographique) ArchiMer
Guillaumont, Brigitte; Hamon, Dominique; Loarer, Ronan.
Tipo: Text
Ano: 1986 URL: http://archimer.ifremer.fr/doc/00047/15845/13248.pdf
Registros recuperados: 38
Primeira ... 12 ... Última
 

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