Consulta: creatorFacets:"Blanchard, Michel"
Registros recuperados: 43
Data/hora: 06/06/2024 01:19:36

Impact des facteurs environnementaux et des pratiques conchylicoles sur la baie du Mont Saint-Michel et la production conchylicole. Etude de scenarii par modélisation. Programme Liteau 3. Rapport Final
Provedor de dados: 5
Autores: Cugier, Philippe; Frangoudes, Katia; Blanchard, Michel; Mongruel, Remi; Perez, Jose; Le Mao, Patrick; Robin, T.; Fontenelle, Guy; Mazurie, Joseph; Cayocca, Florence; Pouvreau, Stephane; Olivier, F.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00026/13707/10862.pdf

Etat de la prolifération de la crépidule (Crepidula fornicata) en baie de Saint-Brieuc.
Provedor de dados: 5
Autores: 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

Golfe Normano-Breton - Etude Régionale Intégrée
Provedor de dados: 5
Autores: Le Hir, Pierre; Bassoullet, Philippe; Erard, E.; Blanchard, Michel; Hamon, Dominique; Jegou, Anne-marie.
Ce rapport en 6 volumes est le résultat d'une étude pluridisciplinaire (6 thèmes correspondant aux volumes du rapport), réalisée sur un secteur géographique bien délimité, présentant des caractéristiques physiques et biologiques particulières (très fort marnage, grande hétérogénéité des fonds, forte production biologique à base de mollusques filtreurs…), et siège d'activités humaines importantes et diversifiées (essentiellement basées sur l'exploitation des ressources du milieu). L'étude fait suite à un Livre Blanc établi en 1982, synthétise les données existantes, et les complète par des travaux originaux sur la connaissance des mécanismes naturels, en particulier de ceux qui ont une relation directe ou indirecte avec les activités humaines (processus...
Tipo: Text
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00047/15837/13240.pdf

Etude bibliographique de quelques espèces planctoniques et benthiques littorales de la Manche - Volume 3 - Espèces zoobenthiques
Provedor de dados: 5
Autores: Blanchard, Michel.
This document is the third volume of a bibliographical survey of some of the species studied by IFREMER Brest's Coastal Environment Department (DEL) on a regular basis. The studied animals are a selection of characteristic community species (ex: Lanice or Abra) or populations whose density is so large that they are the ideal material for a regular pluri-annual study (ex: Nucule). For some of them, a regular geographical distribution along the Channel coasts, can be another reason for their selection. On the one hand, for some species, which can be easily reached on the tidal zone, works are numerous and documentation heavy, especially in the ethology field (building of tube of Lanice, displacement of Patelle) On the other hand, documentation, if any, is...
Tipo: Text
Palavras-chave: Bentic; Coastal species; Plankton; English Channel sea; Tapes rhomboides; Spisula ovalis; Abra alba; Glycymeris glycemeris; Nucula nucleus; P. intermedia; P. aspera; Patella vulgata; Lanice conchilega; Benthiques; Espèces littorales; Plancton; Manche; Tapes rhomboides; Spisula ovalis; Abra alba; Glycymeris glycemeris; Nucula nucleus; P. intermedia; P. aspera; Patella vulgata; Lanice conchilega.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/rapport-3697.pdf

Bilan du suivi de l'exploitation industrielle de la crépidule en Bretagne Nord (baies de Saint-Brieuc et du Mont Saint-Michel) 2002-2005
Provedor de dados: 5
Autores: 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

Cartographie et évaluation des principaux mollusques filtreurs du Golfe Normano-Breton
Provedor de dados: 5
Autores: Noel, Philippe; Blanchard, Michel; Berthou, Patrick.
During 1993 and 1994, quantitative sampling were realized in Norman Gulf (Western Channel) to estimate molluscs suspension-feeders. Four bivalves are regularly sampled : Spisula ovalis, Tapes rhomboides, Glycymeris glycymeris and Venus verrucosa. For each species, individual age and weight were noticed. The spreading gastropod Crepidula fornicata was also sampled. The resultant biomass and distribution are proposed. These results will contribute to the evaluation of trophic exchanges in boundary layer and to the proposed modeling, in the program PNOC (National Program for Coastal Oceanography). NOT CONTROLLED OCR
Tipo: Text
Palavras-chave: Western Channel; Norman Gulf; Crepidula fornicata; Venus verrucosa; Glycymeris glycymeris; Tapes rhomboides; Spisula ovalis; Suspension feeders; Cartography; Estimation; Manche Ouest; Golfe Normano Breton; Crepidula fornicata; Venus verrucosa; Glycymeris glycymeris; Tapes rhomboïdes; Spisula ovalis; Suspensivores; Cartographie; Evaluation.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/rapport-3856.pdf

Impacts cumulatifs des pertes et dommages physiques. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanchard, Michel.
Tipo: Text
Palavras-chave: Méditerranée; Dommages physiques; Impacts; Habitats; Herbiers; Biocénoses; Espèces.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44221/43790.pdf

Spread of the slipper limpet Crepidula fornicata (L. 1758) in Europe. Current state dans consequences
Provedor de dados: 5
Autores: Blanchard, Michel.
The present distribution of the slipper limpet Crepidula fornicata in Europe is described in detail for each country, and an overview provided thanks to new information. Main observations of introduction and spread, obtained from the literature, are discussed. For most of them, we observe that both aspects are due to oyster harvesting and farming. ln the most heavily infested areas (France, England, the Netherlands), activities of dredging, harvesting and oyster farming have been disrupted. In France, these activities are so much hampered that treatment methods are now developed.
Tipo: Text
Palavras-chave: Slipper limpet; Crepidula fornicata; Invasions; Europe.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00423/53398/54271.pdf

Recent expansion of the slipper limpet population (Crepidula fornicata) in the Bay of Mont-Saint-Michel (Western Channel, France)
Provedor de dados: 5
Autores: Blanchard, Michel.
A population of the invasive slipper limpet (Crepidula fornicata) has been spreading in the Bay of Mont-Saint-Michel (Western English Channel) for 40 years. Sidescan sonar, underwater video and quantitative sampling were conducted in 1996 and 2004 to document the widening geographic spread of the species over the bay. The limpet population grew by 50% during this period, to reach a fresh biomass of about 150 000 t. This local study analyses causes and effects of the spread and provides a typical example of the limpet spreading process. This population increase has significant effects on the environment in the most densely colonized area (modification to the sediment and biodiversity), leading to the emergence of a new benthic community. Anthropic dredging...
Tipo: Text
Palavras-chave: Western Channel; France Crepidula fornicata Sidescan sonar Stock estimation Oyster farming Spread Invasive species.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6351.pdf

Etude l'écotoxicité des sédiments dragues - Documents de synthèse et annexes - Projet du groupe GEODE
Provedor de dados: 5
Autores: Quiniou, Francoise; Blanchard, Michel; Bocquene, Gilles; Burgeot, Thierry; Giboire, Louis; His, Edouard; Le Du, Anne.
La présente étude a pour objectif de sélectionner des méthodes de laboratoire et de terrain les mieux appropriées pour l'évaluation de l'écotoxicité de sédiments dragués : indicateurs biochimiques d'exposition (EROD et AChE), tests de toxicité sublétale (micro-organismes, algues, embryons de bivalve et extrait enzymatiques de poisson), indices physiologiques de bivalve (respiration, excrétion, mouvements valvaires). Une synthèse des résultats est présentée accompagnée, en annexes, des rapports des différents participants à l'étude.
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00104/21573/19153.pdf

Impacts cumulatifs des pertes et dommages physiques. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanchard, Michel.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Dommages physiques; Impacts; Habitats; Herbiers; Espèces.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43852/43426.pdf

Dynamique de la population de crépidule (Crepidula fornicata) en Baie du Mont Saint-Michel
Provedor de dados: 5
Autores: Blanchard, Michel.
A population dynamic study has been carried out on slipper-limpet Crepidula fornicata, in the bay of Mont-Saint-Michel (Brittany, France), for the National Program for Coastal Environment (Programme National d'Environnement Côtier - P.N.E.C.), from samples collected between February and October 2002. Analysis were done on sexuality, reproduction, growth and production. In this population, we observe twice more males than females, which is the consequence of an active reproduction and a sign of a continuous spread. Our results show that the laying period runs from February to October, with two or three main peaks corresponding to a significant rise in water temperature. All females lay eggs in May, but the results demonstrate that the oldest females also...
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-5900.pdf

Etude bioénergétique de six mollusques bivalves en baie de Saint-Brieuc
Provedor de dados: 5
Autores: Blanchard, Michel.
Laboratory experiments on physiological parameters, have been performed, in order to obtain the Scope For Growth, of six species of marine bivalves. Between March 1988 and April 1989, intertidal and subtidal individuals, collected in the Bay of SAINT-BRIEUC, have been submitted to the analysis. Among them, LAEVICARDIUM CRASSUM, ACANTHOCARDIA ECHINATA, TAPES RHOMBOIDES and CORBULA GIBBA, were collected in the subtidal area, and CERASTODERMA EDULE, TELLINA TENUIS on intertidal flats. Results show similar patterns for the first three species mentioned above, but they exibit large variability for the other species studied, due to some heterogeneity in their size, habitat and egestion rate. Results obtained from laboratory experiments have been generalised to...
Tipo: Text
Palavras-chave: Bilan énergétique; Baie de SAINT; BRIEUC; Mollusques Bivalves; Scope For Growth; Bay of SAINT; BRIEUC; Bivalves Molluscs.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00102/21315/18935.pdf

Suivi des opérations de nettoyages des bancs de crepidules sur le littoral de Fouras
Provedor de dados: 5
Autores: Blanchard, Michel; Thomas, Gerard.
Une opération expérimentale de nettoyage des crépidules a été entreprise à Fouras entre le 9 et le 12 mai 1995. Les quantités de crépidules enlevées à proximité des concessions ostréicoles ont été estimées à 150 tonnes. Après cuisson, à l'aide d'un système de type hollandais, elles ont été déposées dans une fosse marine au large de l'île d'Aix. Il convenait de s'assurer de l'efficacité du traitement et de l'innocuité des rejets pour le milieu marin. Les mesures et observations, effectuées par l'IFREMER avant, pendant et postérieurement à cette expérimentation, font l'objet du présent rapport. Au vu des résultats, le traitement semble efficace et la perturbation mineure sur le milieu.
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00105/21615/19195.pdf

Recueil de données bibliographiques sur l'hydrologie du Golfe de Lion (température, salinité, oxygène)
Provedor de dados: 5
Autores: Blanchard, Michel.
Tipo: Text
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00081/19233/16828.pdf

Cartographie et évaluation du stock de crépidules en baie du Mont Saint-Michel, en 2004
Provedor de dados: 5
Autores: Blanchard, Michel; Clabaut, Philippe; Abernot-le Gac, Chantal.
In 2003 and 2004, 3 cruises were organized using observations systems and sampling techniques to carry out cartography and stock assessment of the Slipper-limpet population (Crepidula fornicata) in the bay of Mont-Saint-Michel (Western Channel). This was done as part of the National Programme of Coastal Environment (Programme National d'Environnement Côtier - PNEC). The study helped to update previous data collected in 1995-96 with similar techniques : side-scan-sonar and submarine video for observation, and scuba diving and grabs for samples collection. Results show that during an eight years period, the limpet population spread in the southern part of the bay and that its stock rose about 50%, reaching about 150,000 metric tons, south of a...
Tipo: Text
Palavras-chave: Manche ouest; Golfe normano breton; Baie du Mont Saint Michel; Sonar à balayage latéral; Cartographie; Évaluation de stock; Crepidula fornicata; Crépidule; Western Channel; Norman Gulf; Bay of Mont Saint Michel; Side scan sonar; Cartography; Stock assessment; Crepidula fornicata; Slipper limpet.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/2006/rapport-5901.pdf

Les fonds marins de Bretagne, un patrimoine remarquable : connaître pour mieux agir
Provedor de dados: 5
Autores: Bajjouk, Touria; Duchene, Julie; Guillaumont, Brigitte; Maud, Bernard; Blanchard, Michel; Derrien-courtel, Sandrine; Dubois, Stanislas; Grall, Jacques; Hamon, Dominique; Hily, Christian; Le Gal, Aodren; Rigolet, Carine; Rossi, Nadège; Ledard, Michel.
Depuis la fin des années 90, les besoins de connaissance et de suivi de la biodiversité marine se sont accrus sensiblement. Les attentes sont motivées par la nécessité de mieux évaluer aussi bien l’impact du changement climatique que celui des activités anthropiques. Fortement convoitées, la faune et la flore benthiques sont en effet soumises à de multiples perturbations générées par les activités humaines, soit physiquement (effets de la pêche aux engins traînants, extractions de granulats, conchyliculture, etc.), soit résultant de pollutions chroniques (rejets urbains, industriels et agricoles) ou d’apports accidentels (pollutions pétrolières, introduction d'espèces exogènes). Il s’agit également de contribuer aux mesures de gestion ou de protection des...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00311/42243/41811.pdf

Crepidula fornicata : cartographie d’une invasion
Provedor de dados: 5
Autores: Blanchard, Michel; Loarer, Ronan; Jarriault, Romain.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00028/13949/11122.pdf

Bilan energetique de la population de coque (Cerastoderma edule ) en baie de Saint-Brieuc, Manche Ouest
Provedor de dados: 5
Autores: Blanchard, Michel.
During one year, from March 1988 to June 1989, the intertidal population of Cerastoderma edule in the Bay of Saint-Brieuc, is investigated. Physiological measurements (ingestion, egestion, respiration and excretion) are monthly carried out in laboratory. We observe that reproductive metabolism influences the results. The energy budget of this cockle population, based on a biomass and production estimate for a 15 x 10 super(6) sq.m. area, is calculated and discussed.
Tipo: Text
Palavras-chave: ANE; France; Brittany; St. Brieuc Bay Cerastoderma edule Bivalvia Marine molluscs Experimental research Excretion Ingestion Temperature Oxygen consumption Respiration Animal physiology Biomass Energy budget.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-1716.pdf

Dynamique de population de la crépidule (Crepidula fornicata) en baie de Saint-Brieuc (Manche-Ouest)
Provedor de dados: 5
Autores: 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/

Etude écologique d'avant projet du site maremoteur du Golfe Normano-Breton 1980-1981 - Le Benthos Subtidal
Provedor de dados: 5
Autores: Blanchard, Michel; Rivain, V.; Retiere, Christian.
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00047/15831/13234.pdf

Liste des espèces marines introduites dans les eaux bretonnes et des espèces introduites envahissantes des eaux périphériques
Provedor de dados: 5
Autores: Blanchard, Michel; Goulletquer, Philippe; Hamon, Dominique; Le Mao, Patrick; Nezan, Elizabeth; Gentil, Franck; Simon, Nathalie; Viard, Frédérique; Ar Gall, Erwan; Grall, Jacques; Hily, Christian; Le Duff, Michel; Stiger-pouvreau, Valérie; Acou, Anthony; Derrien-courtel, Sandrine; Feunteun, Eric; D'Hondt, Jean-loup; Canard, Alain; Ysnel, Frédéric; Perrin, Bertrand.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00026/13737/10865.pdf

Effets de la pression barométrique sur la crépidule (Crepidula fornicata)
Provedor de dados: 5
Autores: Blanchard, Michel.
L'élimination de la crépidule est une préoccupation majeure de la part de nombreux ostréiculteurs. Que leurs concessions soient sous 10 mètres d'eau, comme à Cancale, ou sur l'estran, elles sont de plus en plus envahies par ce gastéropode proliférant. Les professionnels sont obligés de procéder à de fréquents nettoyages. Le problème qui se pose alors est le devenir du produit ainsi débarqué. Très peu de solutions intéressantes sont actuellement proposées, en dehors de l'écrasement et de l'enfouissement dans les terrains agricoles, pour la culture des primeurs comme cela se pratique au Vivier-sur-Mer. Le rejet au large, par grande profondeur, est une solution qui fut proposée par des ostréiculteurs charentais. Les crépidules immergées par des fonds de 2000...
Tipo: Text
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00102/21312/18931.pdf

EUPHORBE : EUtrophisation et PHénomènes d'ORigine BEnthique. Rapport d'activités 1987.
Provedor de dados: 5
Autores: Gros, Philippe; Blanchard, Michel; Chardy, Pierre; Gentien, Patrick; Hamon, Dominique; Monbet, Yves.
This report assesses the main actions of the first year of the EUPHORBE project, and consists of two parts : (i) the first one is the project proposal (objectives, scientific approach) ; in the second one, the 1987' field operations are related.
Tipo: Text
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00107/21825/19413.pdf

Competition for food in the larvae of two marine molluscs, Crepidula fornicata and Crassostrea gigas
Provedor de dados: 5
Autores: Blanchard, Michel; Pechenik, J; Giudicelli, E; Connan, Jean-paul; Robert, Rene.
The degree to which larvae of the invasive American slipper limpet (Crepidula fornicata) and the Japanese oyster (Crassostrea gigas) may compete for food was examined during 2003 in the laboratory. Larval microalgae uptake, growth and mortality were compared for larvae fed each of six species of unicellular algae, ranging in length from 2 to 10 mu m. Tested diets included the two flagellates Tetraselmis chui (Prasinophyceae) and Isochrysis affinis galbana (T-ISO, Haptophyceae), one member of the Chlorophyceae (Nannochloris atomus), and three diatom species (Chaetoceros calcitrans forma pumilum, Chaetoceros gracilis, Skeletonema marino). We found that the limpet larvae ingested phytoplankton over a wider range of cell sizes and ate at higher rates on each...
Tipo: Text
Palavras-chave: Larvae; Crepidula fornicata; Crassostrea gigas Growth Feeding rate Diet Phytoplankton.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4703.pdf

Impact de la phorésie de la crépidule (Crepidula fornicata) sur la coquille Saint-Jacques (Pecten maximus)
Provedor de dados: 5
Autores: Gaudin, Francois; Blanchard, Michel.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00065/17656/15181.pdf

Répartition et évaluation du stock de la crépidule (Crepidula fornicata), entre le cap Fréhel et le Mont Saint-Michel (Manche Ouest)
Provedor de dados: 5
Autores: Blanchard, Michel.
This report deals with results obtained in 1995 and 1996 through a grant of Council of Brittany. The distribution and stock assessment of the slipper-limpet population (Crepidulafornicata) is analysed, in the near shoreline between Cap Fréhel and Mont-Saint-Michel. Several cruises allowed to use side-scan sonar, underwater video and scuba diving observations. Hamon grab has been used for quantitative sampling. Several direct observations were done ashore for complete informations. On this seaside of Brittany, it is observed that the population is mainly concentrated along the coast and main densities are found in the bay of Cancale, around deep oyster beds. Total fresh biomass is estimated about 149 000 metric tons. Local reasons and consequences of such a...
Tipo: Text
Palavras-chave: North of Brittany; Side scan sonar; Spread analysis; Stock assessment; Cartography; Crepidula fornicata; Slipper limpet; Bretagne nord; Sonar à balayage latéral; Causes de prolifération; Évaluation de stock; Distribution géographique; Crepidula fornicata; Crépidule.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/rapport-3854.pdf

Impacts cumulatifs des pertes et dommages physiques. Sous-région marine Mers celtiques. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanchard, Michel.
Tipo: Text
Palavras-chave: Mers celtiques; Dommages physiques; Impacts; Habitats; Espèces.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43957/43530.pdf

Recueil de données hydrologiques (Température-Salinité-Oxigène) en Manche - Atlantique
Provedor de dados: 5
Autores: Blanchard, Michel; Jegou, Anne-marie.
Ce recueil de données hydrologiques est destiné à orienter la recherche de sites favorables, sur le littoral Manche - Atlantique, pour des activités d'aquaculture. Ce n'est pas un inventaire des sites potentiels, ni un recueil de tous les paramètres nécessaires à cette activité. Il s'agit ici d'une approche globale au niveau d'une région, permettant une première sélection basée sur des paramètres hydrologiques : température de l'eau de mer, salinité et taux d'oxygène dissous.
Tipo: Text
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00081/19259/16854.pdf

Suivi des opérations de nettoyage des bancs de crépidules (Crepidula fornicata), en mai 1995, sur le littoral de Fouras (Charente-Maritime)
Provedor de dados: 5
Autores: Blanchard, Michel; Thomas, Gerard.
An experiment was carried out in order to look at the feasability of slipper-Iimpets removal in the area of Fouras (Charente-Maritime, France) between May, 9 - 12, 1995. A total of 150 tons were removed from oyster beds, boiled according to a dutch process and dropped in amarine dump near Aix Island.  It was necessary to check the process efficiency as weil as the environmental quality. lFREMER measure data and observations before, during and after this experiment are the topics of concern.  The process appears to be efficient and the discharge has no significant effect on the environment.
Tipo: Text
Palavras-chave: Crépidule; Crepidula fornicata; Traitement; Fouras; Charente-Maritime; Slipper-limpet; Crepidula fornicata; Process; Fouras; Charente-Maritime; France.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00094/20511/18182.pdf

Impacts cumulatifs des pertes et dommages physiques. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Blanchard, Michel.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Dommages physiques; Impacts; Habitats; Herbiers; Biocénoses; Espèces.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44037/43609.pdf

Susceptibility of larval Crepidula fornicata to predation by suspension-feeding adults
Provedor de dados: 5
Autores: Pechenik, Jan; Blanchard, Michel; Rotjan, Randi.
The slipper shell snail Crepidula fornicata forms dense assemblages along much of the European coast, where it co-occurs with oysters. We examined the susceptibility of slipper shell larvae to predation by suspension-feeders, including adults of their own species. In particular, we compared filtration rates on phytoplankton with those on larvae, and determined the extent to which consumption of larvae varied with adult size, larval size, and with the presence of alternative food (phytoplankton). We also examined the ability of competent larvae to metamorphose successfully in the presence of feeding adults. For each experiment, adults were held in plastic jars with seawater or phytoplankton suspension and allowed to graze on larvae (101 larvae per jar) for...
Tipo: Text
Palavras-chave: Larvae; Susceptibility; Predation.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/2004/publication-755.pdf

Evaluation quantitative de la crépidule ( Crepidula Fornicata) en Baie de Cancale
Provedor de dados: 5
Autores: Blanchard, Michel; Youenou, Gilles.
La prolifération de la crépidule (Crepidula fornicata), sur le littoral français, est actuellement importante. Ce mésogastéropode, s'il est présent sur une grande surface du plateau côtier, se développe particulièrement dans les secteurs abrités, tels que les estuaires et les baies. Dans les secteurs abrités, cette espèce est depuis quelques années, une gêne sérieuse pour la pratique de la pêche par dragage ou par chalutage, mais également pour la conchyliculture, puisqu'elle occupe de plus en plus largement les secteurs concédés, à tel point que les quantités de crépidules pêchées sont supérieures à celles des espèces commerciales. La crépidule est donc un compétiteur spatial des espèces benthiques littorales. C'est aussi un compétiteur trophique,...
Tipo: Text
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00105/21621/19201.pdf

Détermination de l'âge de Crepidula fornicata (mesogasteropode calyptraeide) par mesure isotopique
Provedor de dados: 5
Autores: Blanchard, Michel; Vergnaud - Grazzini, Colette.
To valid the current method of counting the external growth bands of the shell, a new method is tested using isotopie analysis for carbon and oxygen in the shell compounds. Our results valid the current method whith observation of oxygen isotope only. Carbon analysis gives a drift after the fourth band, because of other various parameters.
Tipo: Text
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00040/15128/12465.pdf

La Crépidule : identifier les mécanismes de sa prolifération et caractériser ses effets sur le milieu pour envisager sa gestion (Chantier : Baie de Saint-Brieuc)
Provedor de dados: 5
Autores: Hamon, Dominique; Blanchard, Michel; Houlgatte, Eric; Blanchet, Aline; Gaffet, Jean-dominique; Cugier, Philippe; Menesguen, Alain; Bassoullet, Philippe; Cann, Philippe; Domalain, David; Haubois, Anne-gaelle.
La crépidule (Crepidula fornicata), mollusque gastéropode de la famille des Calyptraeidés, originaire de la côte atlantique d'Amérique du nord, a été introduite accidentellement sur le littoral français en plusieurs étapes (Blanchard, 1995, 1997). La plus importante d'entre elles, au début des années 70, est liée à l'importation massive de l'huître japonaise (Crassostrea gigas), en remplacement de l'huître portugaise (Crassostrea angulata) décimée par une épizootie. Cette espèce opportuniste a notamment proliféré au voisinage des principaux bassins ostréicoles de la Manche et de l'Atlantique. C'est en particulier le cas des zones conchylicoles infralittorales du golfe normano-breton où des évaluations de stocks font état de plusieurs centaines de milliers...
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00032/14295/11574.pdf

Apports des bassins versants dans l'estuaire de l'Aber-Benoît
Provedor de dados: 5
Autores: Blanchard, Michel; Le Saux, Jean-claude; Piriou, Jean-yves.
Un recensement des apports provenant de certains bassins versants dans l'estuaire de l'Aber-Benoît (Bretagne-nord, France) montre que les contaminants susceptibles d'affecter la qualité de l'eau alimentant les huîtres sont de natures diverses. Parmi les éléments étudiés, les mesures donnent des flux minima journaliers de 10(13) coliformes fécaux, 2 tonnes d'azote, 150 kilogrammes de phosphate sur l'estuaire, et 27 grammes de triazines, pesticides les plus importants sur la rivière Aber-Benoît.
Tipo: Text
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00082/19285/16880.pdf

Estimation des flux engendrés par l'activité métabolique des mollusque filtreurs intertidaux en baie de Saint-Brieuc
Provedor de dados: 5
Autores: Blanchard, Michel; Gros, Philippe.
Three main intertidal macrofauna communities are identified in Saint-Brieuc Bay: a Macoma balthica community, a Tellina tenuis community; and a third community with Cerastroderma and Tellina tenuis. Physiological parameters such as filtration, respiration and excretion are examined, for the filter-feeding molluscs with the highest biomass (the cockle Cerastoderma edule, the tellinid Tellina tenuis, and the blue mussel Mytilus edulis), either through laboratory experiments, or through previous literature. These results are used together to build up an annual energy budget for the complete soft bottom community, and to observe trophic relations. Results show that the mussel population has a negative influence on the cockle beds that lie just above.
Tipo: Text
Palavras-chave: ENERGY BUDGET; FLUXES; CERASTODERMA-EDULE; TELLINA-TENUIS; SAINT-BRIEUC BAY.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00100/21132/18752.pdf

Reduction of flatfish habitat as a consequence of the proliferation of an invasive mollusc
Provedor de dados: 5
Autores: Kostecki, Caroline; Rochette, S.; Girardin, R.; Blanchard, Michel; Desroy, Nicolas; Le Pape, Olivier.
Coastal bays provide habitats for juveniles and adults of many marine species. Mont Saint-Michel Bay (MSMB, France) hosts a highly diversified fish community and constitutes one of the most important nursery grounds for many commercially exploited marine species, such as sea bass, flatfish, clupeids and rays in the English Channel. Besides, MSMB also suffers from the massive invasion of an exotic mollusc, the American slipper-limpet (Crepidula fornicata, L). This species arrived four decades ago and now represents the main filter-feeder biomass in the bay (150 Mt), an order of magnitude larger than local farmed and natural shellfishes. Recent analyses underlined the impact of this small gastropod on the trophic structure of this bay and its negative...
Tipo: Text
Palavras-chave: Spatial competition; Flatfish habitat; Crepidula fornicata; Invasive species; Mont Saint-Michel Bay.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00035/14641/11990.pdf

Etat de la prolifération de la crépidule (Crepidula fornicata L.) dans le secteur de Granville (Golfe Normano-Beton - 1985)
Provedor de dados: 5
Autores: Quiniou, Francoise; Blanchard, Michel.
An area located between the Mont-St-Michel Bay and Jersey was monitored from 1984 to 1985. Limpet densities have been evaluated through quantitative sampling and underwater video. At the same time, some planktonic samplings have enabled the monitoring of the evolution of larval abundances. Maxima, planktonic and benthic density areas superpose each other. Moreover, the study of the populations shows that the number of young colonies is increasing, thus clearly indicating that Crepidula fornicata populating is booming in the Norman-Breton gulf.
Tipo: Text
Palavras-chave: Evolution; Distribution spatiale; Golfe Normano breton; Adulte; Larve; Crepidula fornicata.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-6190.PDF

Golfe Normano-Breton. Bilan des connaissances
Provedor de dados: 5
Autores: Blanchard, Michel; Chardy, Pierre; Chaussepied, Marcel; Dao, Jean-claude; Le Hir, Pierre; Jegou, Anne-marie; Larsonneur, C.; Loarer, Ronan; Manaud, Francois.
Ce document a été élaboré dans le cadre de la préparation d'un programme d' "étude régionale intégrée" du golfe normano-breton. Réalisé dans des délais très courts, il ne constitue pas un inventaire exhaustif des travaux effectués dans le golfe mais une illustration par grands secteurs disciplinaires de l'état actuel des connaissances. Son objectif est de cerner les domaines à développer dans le cadre d'une programmation poly-disciplinaire orientée vers la gestion de l'espace littoral. La présentation par disciplines fondamentales de l'océanographie (physique, sédimentologie, biologie) est associée à un bilan de l'utilisation du milieu, faisant apparaître la diversité et la complexité des problèmes à résoudre. En effet, point privilégié entre la Manche...
Tipo: Text
Ano: 1982
URL: http://archimer.ifremer.fr/doc/00450/56186/57739.pdf

Origine et état de la population de Crepidula fornicata (Gastropoda Prosobranchia) sur le littoral français
Provedor de dados: 5
Autores: Blanchard, Michel.
The introduction of the limpet Crepidula fornicata on French coasts occurred through a number of stages of unequal amplitude. The two main stages are the result of a) its transportation on the hulls of the Allies ships during WWII, and b) the voluntary introduction of the Japanese oyster Crassostrea gigas in the 1970s. A recent assessment of its distribution shows that it can be found from the North Sea to the Mediterranean shores, resulting in some conflicts, due to its high density.
Tipo: Text
Palavras-chave: Littoral français; Répartition; Introduction; Crepidula fornicata.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/publication-6191.PDF

Le projet ANR-COMANCHE 2010-STRA-010. Interactions écosystémiques et impacts anthropiques dans les populations de COquilles Saint-Jacques (Pecten maximus) de la MANCHE. Rapport scientifique final
Provedor de dados: 5
Autores: Foucher, Eric; Blanchard, Michel; Cugier, Philippe; Desroy, Nicolas; Dreanno, Catherine; Fauchot, Juliette; Fifas, Spyros; Guyader, Olivier; Jean, Frederic; Le Gallic, Bertrand; Riou, Philippe; Schapira, Mathilde; Thiebaut, Eric.
The King scallop Pecten maximus constitutes the first landed species in terms of tonnage and the second or third one in terms of value for the French fisheries. More than 90% of these landings come from the English Channel indicating that its exploitation is essential to local fleets. The COMANCHE project (Ecosystem Interactions and anthropogenic impacts on King scallops populations in the English Channel) proposed to improve the knowledge of the scallop within the Channel, through an ecosystem-based approach for fisheries, appealing to a wide range of scientific disciplines (physics, chemistry, genetics, ecology, geostatistics, modeling, economics ....). Researches on the spatial location of scallop beds, connectivity by larval dispersal between beds,...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00251/36236/34797.pdf

Cartographie synthétique et analyse des peuplements benthiques sur deux secteurs du littoral français "Manche-Est" et "Loire-Gironde"
Provedor de dados: 5
Autores: Blanchard, Michel; Heim, Marie; Rozec, Xavier; Caisey, Xavier.
This document presents a synthetic study of benthos in two large areas of the French coast: East-Channel and the area between Loire and Gironde. This original synthesis stocktakes biotopes maps published for the vast majority in the 70’s. The report uses the previous descriptions and analysis done by the different authors, and translates them with present specific names or biotopes codes, as proposed in the European EUNIS referring system. The presented maps are standardized and referred geographically with WGS84 to be collated together. For each biotope, specific richness and ecological richness are analysed, thanks to the information given by the various authors. Some informative cards of the main representative species are also presented in the...
Tipo: Text
Palavras-chave: Benthos; Peuplement; Cartographie; Littoral français; Manche Est; Bretagne sud; Vendée; Pertuis charentais; Golfe de Gascogne; Benthos; Community; Cartography; French coast; East Channel; Southern Brittany; Vendée; Pertuis charentais; Bay of Biscay.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00003/11434/7983.pdf