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| Registros recuperados: 29 | |
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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; 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 |
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| Deslous Paoli, Jean-marc. |
| Dans le bassin de Marennes- Oléron , Crepidula fornicata a principalement colonisé trois secteurs (les bords du banc de Charret, le courant d'Oléron, les abords de l'Estrée) à des densités dépassant 2 500 individus au mètre carré, mais aussi présente de façon diffuse dans tout le nord du bassin. La biomasse estimée, pour les deux premiers secteurs, est d'environ 3 700 tonnes dont 1 500 tonnes ont été draguées et rejetées à terre en 1983. Il semble par ailleurs qu'il y ait un début d'infestation des gisements à Pecten maximus dans le pertuis d'Antioche. La courbe de croissance moyenne de Crepidula fornicata a été définie en fonction de l'âge (Lc = 78,79 (1 - e - 0,439(t - 0,347)) , et , du fait de la correspondance âge-position dans les associations en... |
| Tipo: Text |
Palavras-chave: Crepidula fornicata; Répartition géographique; Dynamique de population; Biodéposition; Biologie; Filtration; Bassin de Marennes Oléron. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/00092/20357/18018.pdf |
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| Deslous Paoli, Jean-marc. |
| Des prélèvements dans le bassin de Marennes-Oléron ont permis de localiser les fortes charges de Crepidula fornicata L. principalement dans le centre du bassin (le long du banc de Charret et dans le courant d'Oléron). En ces deux points la charge fraîche cumulée a été estimée à environ 2 700 tonnes. La structure de population fait apparaître une croissance moyenne de 20, 19, 17 et 12 millimètres respectivement pour les 1ère, 2ème, 3ème et 4ème années avec une variabilité très importante dès la première année. 74,5% des animaux constituent des chaines primaires d'en moyenne six individus fixés sur des coquilles de crépidules mortes. La période de reproduction s'étale vraisemblablement du mois d'avril au mois de septembre et 25% des individus portent des... |
| Tipo: Text |
Palavras-chave: Crepidula fornicata; Population; Croissance; Reproduction; Marennes Oléron. |
| Ano: 1982 |
URL: http://archimer.ifremer.fr/doc/00092/20356/18017.pdf |
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| Schoenn, Jennifer. |
| During the last years, numerous authors have increasingly studied ecosystem goods and services so that their quantification can be integrated to support environmental policy and management system. But, there are still many methodological issues to solve, before making valuation of both ecosystem functions and ecosystem services in marine realm. This present study aims (1) to define the ecosystem functions and ecosystem services and (2) to provide their first assessment in the study area, the Saint Malo Gulf (Western Channel). The study area is designed to harbour a marine protected area. Firstly, we identified and mapped all benthic habitats in the gulf using the EUNIS typology at the level 4. Afterwards, we defined every ecosystem function and ecosystem... |
| Tipo: Text |
Palavras-chave: Biens et Services écosystémiques; Evaluation; Habitats benthiques; Crepidula fornicata; Golfe Normano; Fonctions écologiques. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00156/26693/24759.pdf |
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| Le Pape, Olivier; Guerault, Daniel; Desaunay, Yves. |
| This study describes the effect of an invasive mollusc, the slipper limpet Crepidula fornicata, on the distribution and abundance of young-of-the-year sole Solea solea in coastal nursery areas, based on beam-trawl surveys in the Bay of Biscay (France) over a 3 yr period (2000 to 2002). As habitat suitability for juvenile sole varies according to bathymetry and sediment structure, these factors and the density of the slipper limpet were used as descriptors in generalised linear models of habitat suitability to characterise the distribution of juvenile sole. The models were based on a delta distribution, coupling a binomial model testing for the presence of juvenile sole with a log-normal distribution for density when juveniles were known to be present.... |
| Tipo: Text |
Palavras-chave: Solea solea; Nursery ground; Habitat suitability models; Crepidula fornicata; Invasive species; Bay of Biscay. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/00000/10854/7579.pdf |
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| Goulletquer, Philippe. |
| Species invasion is considered as a main factor impacting the marine biodiversity (CBD, 2008). A comprehensive review of species invasion along the French Atlantic coastline is carried out to assess the present status and side effects resulting from those invasions. Vectors of introduction concerning voluntarily and involuntarily, legal & illegal case studies are reviewed to provide baseline information relating invasion success and potential control. Historical case studies regarding shellfish aquaculture-fisheries development and impacts of exotic diseases (e.g., Bonamia ostreae) as well as hitchhikers (e.g., Rapana venosa) are discussed. Among at least 150 reported exotic species, around 10 species have highly significant side-effects on the... |
| Tipo: Text |
Palavras-chave: Rapana venosa; Bonamia ostreae; Ruditapes philippinarum; Crepidula fornicata; Crasssostrea gigas; Species invasion; Marine biodiversity. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/acte-6828.pdf |
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| Arbach Leloup, F.; Desroy, Nicolas; Le Mao, Patrick; Pauly, D.; Le Pape, Olivier. |
| To ensure sustainable uses of the coastal zone, an integrated ecosystemic approach and ecosystem models are required to frame ecological processes and evaluate environmental impacts. Here, a mass-balance trophic (Ecopath) model of the Mont Saint Michel Bay (MSMB) was developed, to analyze the bay's functioning as an ecosystem. This bay, intensively exploited by fishing and for shellfish farming, is also suffering from the proliferation of the gastropod Crepidula fornicata, an exotic species. The MSMB model has 18 compartments, from the primary producers to top predators, and emphasizes the large biomass of filter feeders. The model identified the MSMB as a highly productive ecosystem controlled largely from the bottom-up, and strongly impacted by huge... |
| Tipo: Text |
Palavras-chave: Mont Saint Michel Bay; Crepidula fornicata; Invasive species; Shellfish farming; Trophic model; Ecopath. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2605.pdf |
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| Registros recuperados: 29 | |
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