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| Registros recuperados: 43 | |
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| 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 |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00026/13707/10862.pdf |
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| 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 |
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| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/00047/15837/13240.pdf |
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| 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 |
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| 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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| 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 |
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| 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 |
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| 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 |
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| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00104/21573/19153.pdf |
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| 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 |
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| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/rapport-5900.pdf |
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| 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 |
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| 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 |
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| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00105/21615/19195.pdf |
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| 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... |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00311/42243/41811.pdf |
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| 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 |
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| Ano: 2001 |
URL: https://w3.ifremer.fr/archimer/doc/00000/5305/ |
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| Registros recuperados: 43 | |
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