Consulta: subjectFacets:"Crepidula fornicata"
Registros recuperados: 29
Data/hora: 03/06/2024 02:08:18

Crepidula fornicata L. dans le bassin de Marennes-Oléron - Rapport 1984
Provedor de dados: 5
Autores: 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

Crepidula fornicata L. dans le bassin de Marennes-Oléron - Rapport préliminaire 1982
Provedor de dados: 5
Autores: 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

Subtidal Microphytobenthos: A Secret Garden Stimulated by the Engineer Species Crepidula fornicata
Provedor de dados: 5
Autores: Androuin, Thibault; Polerecky, Lubos; Decottignies, Priscilla; Dubois, Stanislas; Dupuy, Christine; Hubas, Cedric; Jesus, Bruno; Le Gall, Erwan; Marzloff, Martin; Carlier, Antoine.
The slipper limpet Crepidula fornicata is an emblematic invasive species along the northeast Atlantic coast. This gregarious gastropod lives in stacks of several individuals and forms extended beds in shallow subtidal areas. The effects of this engineer species on the colonized habitat can be physical (e.g., presence of hard-shell substrates with uneven topography) or biological (e.g., nutrient enrichment by direct excretion or via biodeposition). We hypothesized that through biological activity, nutrient fluxes at the sediment-water interface are enhanced, leading to stimulated primary productivity by microphytobenthos (MPB) associated with Crepidula beds. To test this fertilization hypothesis, we conducted a 10-day mesocosm experiment using C. fornicata...
Tipo: Text
Palavras-chave: Crepidula fornicata; Engineer species; Subtidal microphytobenthos; Fertilization; Hyperspectral imaging.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00472/58338/60893.pdf

Modelling benthic invasion by the colonial gastropod Crepidula fornicata and its competition with the bivalve Pecten maximus . 1. A new 0D model for population dynamics of colony-forming species
Provedor de dados: 5
Autores: Menesguen, Alain; Gregoris, Thomas.
The north-American marine gastropod Crepidula fornicata (Linné 1758), commonly called slipper limpet, has been introduced accidentally in Great Britain, along with American oysters (Crassostrea virginica) at the end of the 19th century. Its spreading, enhanced by oyster transport and international shipping, turned into invasion of a lot of benthic grounds along the North-European coasts. When local conditions are favorable to larval confinement and adult growth, the invasion by very dense populations may deeply change initially sandy or muddy benthic communities into similar “slipper limpet communities”. Competition for space eliminates several species of native infauna, and hampers the survival of some epibenthic bivalves such as the scallop Pecten...
Tipo: Text
Palavras-chave: Crepidula fornicata; Invasive species; Benthic gastropod; Colony model; Matching matrix; Pecten maximus; Competition; Population dynamics; Limit cycle.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00415/52601/53491.pdf

Crepidula fornicata L. (gastéropode) dans le bassin de Marennes-Oléron : structure, dynamique et production d'une population
Provedor de dados: 5
Autores: Deslous-paoli, Jean-marc.
The reproduction of Crepidula fornicata occurs from the end of February to October. This reproduction determines two periods of juvenile settlement, the first early in June and the second early in October.  Because of the lack of distinct cohorts, estimation of production and population dynamics was made according to the location of individuals in the chain. This was confirmed by the agreement between the growth rings of the shells and individual location in the chain. The main chain accounted for 80 per cent of individuals, the others being isolated or in collateral chains. The curvilinear growth of Crepidula fornicata in the bay of Marennes-Oléron follows the equation Le = 81.01 (1-e (-0.400 8(t-0,01)). The average yearly production from a population of...
Tipo: Text
Palavras-chave: Production; Marennes-Oléron; Crepidula fornicata; Dynamique de population; Population dynamics; Production; Marennes-Oléron; Crepidula fornicata.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/publication-2956.pdf

Définition et quantification des fonctions écologiques dans le golfe Normano-Breton. Une étape dans l’évaluation des biens et des services écosystémiques d’une future Aire Marine Protégée
Provedor de dados: 5
Autores: 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

Effets ingénieurs auto- et allogénique de l’espèce invasive Crepidula fornicata (Linnaeus, 1758) sur la diversité structurelle et fonctionnelle des habitats benthiques colonisés de la rade de Brest
Provedor de dados: 5
Autores: Vallee, Vincent.
The non-native slipper limpet Crepidula fornicata (Linnaeus, 1758) has proliferated in the Bay of Brest during the 90s. This suspension-feeding gastropod has become a dominant species both in terms of density (&gt; 2000 ind.m-2) and biomass (127 000 t fresh weight in 2000). C. fornicata is also an ecosystem engineer that modifies its habitat by the presence of its own shell (autogenic engineering) and by biodeposition of faeces and pseudo-faeces (allogenic engineering). Here, we tested the effects of C. fornicata on the colonized communities’ structural and functional diversity by distinguishing his auto- and allogenic engineering effects. One way these changes were studied along a gradient characterized by the total weight of slipper limpet (dead and...
Tipo: Text
Palavras-chave: Crepidula fornicata; Espèce ingénieur; Diversité structurelle; Diversité fonctionnelle; Analyse des traits biologiques; Rade de Brest; Crepidula fornicata; Ecosystem engineer; Structural diversity; Functional diversity; Biological traits analysis; Bay of Brest.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00368/47920/47949.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

Effect of an invasive mollusc, American slipper limpet Crepidula fornicata, on habitat suitability for juvenile common sole Solea solea in the Bay of Biscay
Provedor de dados: 5
Autores: 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

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

Etude sanitaire de la zone 35.01 groupe I - Crépidule. Ille et Vilaine
Provedor de dados: 5
Autores: Cheve, Julien; Gerla, Daniel.
Ce rapport final présente l’évaluation de la qualité microbiologique et chimique de la zone 35.01 pour le groupe I : crépidule (Crepidula fornicata), gastéropode filtreur. Aux vues de l’étendue de la zone d’étude (environ 20 km) et de sa position au large, la phase initiale de l’étude ne s’est pas attachée à la définition précise de l’ensemble des caractéristiques du littoral bordant la zone. Mais elle a consisté en une approche plus globale à l’échelle des bassins versants. L’étude s’est déroulée entre novembre 2012 et janvier 2014, avec l’obtention de 26 résultats microbiologiques (dénombrement des E. coli dans 100 g de CLI (Chair et Liquide Intervalvaire)) et la recherche sur un échantillon de molécules chimiques (Cadmium, mercure, plomb, PCB dioxine...
Tipo: Text
Palavras-chave: Etude sanitaire; E. coli; Contamination bactériologique des coquillages; Contaminants chimiques; Milieu marin; Qualité microbiologique et chimique des zones de production; Département 35; Ille-et-Vilaine; Baie du Mont- Saint-Michel; Groupe I; Crépidule; Crepidula fornicata.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00179/29044/27481.pdf

Identification des post-larves de deux Calyptraeidae Calyptraea chinensis et Crepidula fornicata
Provedor de dados: 5
Autores: Jezequel, Youenn; Carlier, Antoine; Grall, Jacques.
This study presents four morphological criteria based on the shell, determined under a stereomicroscope, allowing the identification of the Calyptraeidae’s post larvae in Calyptraea chinensis and Crepidula fornicata from a 0.7mm size. The septum shape in C. chinensis is spiraled while in C. fornicata it is perpendicular to the longitudinal axis of the shell (beginning of the lodge’s formation), which constitutes the most reliable criterion when trying to discriminate between the species. C. chinensis shells coloration appears homogeneous and concentric whereas colored spots are observed on C. fornicata shells. Calyptraea chinensis shell shape is circular while Crepidula fornicata shell shape is oval. Lastly the apex appears centered in C. chinensis and...
Tipo: Text
Palavras-chave: Calyptraea chinensis; Crepidula fornicata; Post-larve; Critères morphologiques; Calyptraea chinensis; Crepidula fornicata; Post larva; Morphological criteria.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00523/63535/67199.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

Assessment of energetic requirements of reared molluscs and of their main competitors
Provedor de dados: 5
Autores: Deslous-paoli, Jean-marc.
In the context of aquaculture in open sea• the amount: and qua11ty of food is variable according to the season and the physical flux in the ecosystem (carrying capacity  ecosystems ). Thus to predict the potential al production of a cultivated ecosystem,  it is mandatory 'co know ~he seasona1 changes in organisms energy balance of cultivated organisms. These changes result from the environmental  variability either  in the temperature  or more significantly in the nutrients supply (Bayne and Newell, 1983).  The techniques of physiological energetics allow to understand the adaptations of the energy balance in bivalve molluscs and to calculate the complete energy budget all  over the seasonal variations of the field. Such studies are few, they include...
Tipo: Text
Palavras-chave: Crepidula fornicata; Perna perna; Mytilus chilensis; Mytilus edulis; Mercenaria mercenaria; Crassostrea gigas; Scrobicularia plana; Physilogy; Energy balance; Carrying capacity ecosystems.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-2960.pdf

Bilan energetique d'une population naturelle de Crepidula fornicata dans le bassin de Marennes-Oleron
Provedor de dados: 5
Autores: Deslous-paoli, Jean-marc; Heral, Maurice; Masse, H.
An energy budget has been evaluated for a natural population of Crepidula fornicata living at low water of spring tides in the oyster farming basin of Marennes-Oleron. This budget of production was estimated according to the position along the chain. The average biomass for an individual representative of the population was equivalent to 1.87 Kjoules, and the annual consumption C was 20.08 Kjoules/year. The energy budget expressed in percent of energy consummates was: C = Pg + Pr + Ps + R + F; 100 = 4.6 + 1.6 + 0.8 + 48 + 45. This budget is compared with literature data on other herbivorous gastropods and with those calculated for Crassostrea gigas in the same locality.
Tipo: Text
Palavras-chave: Bivalvia; Crepidula fornicata; Seasonal variations; Population structure; Energy budget; Bassin de Marennes Oléron; Bilan énergétique; Crepidula fornicata.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1181.pdf

Influence du vieillissement d'une population de crépidules sur l'épifaune associée. Influence sur le recrutement
Provedor de dados: 5
Autores: Haubois, Anne-gaëlle.
Crepidula fornicata (slipper Iimpet) is a gastropod mollusc, coming from the North American east coast. Since its accidentaI introduction on french coasts, fifty years ago, C. fomicata invaded several coastal areas of this country and the bay of Saint Brieuc (Brittany -France) is one of the major site affected by the proliferation. Accumulation of dense mats of the slipper limpet contributes to the modification of the bottom structure and affects the substrate's heterogeneity, allowing the settlement of a diversified vagile and sessile epifauna. In this paper, the effects of the C. fornicata population ageing on epifauna assemblages and recruitment are studied. Quantitative and qualitative analysis of epifauna organisms suggests that, the ageing of the C....
Tipo: Text
Palavras-chave: Crepidula fornicata; Vieillissement; Épifaune; Compétition; Baie de Saint-Brieuc; Crepidu/afornicata; Ageing; Epifauna; Competition; Bay of Saint-Brieuc.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00037/14822/12138.pdf

History and economic consequences of species invasions on Atlantic coast: "good" &amp; "bad" examples
Provedor de dados: 5
Autores: 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 &amp; 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

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

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

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

Interactions between a natural food web, shellfish farming and exotic species: The case of the Bay of Mont Saint Michel (France)
Provedor de dados: 5
Autores: 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

Crepidula fornicata L. (mollusque, gastéropode) en baie de Marennes-Oléron : cartographie des fonds par sonar à balayage latéral et estimation du stock
Provedor de dados: 5
Autores: Sauriau, Pierre-guy; Pichocki-seyfried, C; Walker, P; De Montaudouin, Xavier; Palud, Cecile; Heral, Maurice.
Extensive and detailed subtidal ground mapping of the Marennes-Oleron Bay and Fouras-Aix areas was performed with a side-scan sonar. Side-scan sonographs gave a comprehensive view of sedimentological bottom environments and also allowed us to outline locations of grounds colonised by the gastropod mollusc Crepidula fornicata L. with a precise estimate of their surface. A sedimentological map of the centre of the Marennes-Oleron Bay is given, describing spatial organisation of the following four types of sediment: pure mud, fine sand, coarse sand and rocks. Crepidula beds were also recognised on sonographs and were estimated to cover 181 hectares in the Fouras-Aix area and 615 hectares within the Marennes-Oleron Bay. Standard sampling methods were then...
Tipo: Text
Palavras-chave: Crepidula fornicata; Cartographic; Stock; Sonar à balayage latéral; Marennes-OlCron; Crepidula fornicata; Mapping; Stock assessment; Side-scan sonar; Marennes-Oleron Bay.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/publication-854.pdf

Cartographie des bancs de crépidules dans le bassin de Marennes Oléron: analyse par imagerie acoustique et sondeur de sédiment
Provedor de dados: 5
Autores: Curti, Cécile.
The slipper limpet Crepidula jornicata, gastropod introduced on the North East Atlantic coasts, is considered as an invasive species, especially in shellfish fmming areas in France. Slipper Iimpet populations have been estimated in Marennes Oléron Bay since 1980. In 1995, a sidescan sonar mapping associated to a quantitative estimation of the stocks by « grab » was carried out. This study aims to update the current mapping of slipper limpet beds in the Marennes Oléron Bay using acoustic reading techniques coupled to samples. In autumn 2008, an acoustic campaign was performed through the Ifremer boat named Haliotis and sonograms obtained during the campaign were then analysed using the software CARAIBES. Acoustic images were calibrated through30 grab...
Tipo: Text
Palavras-chave: Crepidula fornicata; Cartographie; Sonar inteférométrique; Marennes-Oléron; Crepidula fornicata; Cartography; Interferometric sonar; Marennes-Oléron Bay.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00411/52295/53045.pdf

Répartition géographique et structure de population de Crepidula fornicata Linné dans le bassin de Marennes-Oléron en 1981 et 1982
Provedor de dados: 5
Autores: Deslous-paoli, Jean-marc; Masse, Henri.
Hundred and ten samplings were made in the bay of Marennes Oleron, during the summer 1981. They allow to localize the hight loads of Crepidula fornicata in the middle of the bay (along the mud-bank of Charret and in the courante d'Oleron°.  In this two Points, we value the dry biomass at about 2,3 kg/m2 on the mud-bank of Charret and at 1,1 kg/m2 in the courante d'Oleron. The weight present on this two banks (about 550 000 m2) is approximatively 700 tons of slipper limpets. The mean growth rate is 20, 19, 17 and 12 mm respectively on the 1"-, 2n ,3rd and  4th year with a very important variability since the first year. 74,5 %of the individuals form the main chains (mean of 6 slipper limpets) attached on shells of dead slipper limpets.  Some solutions of...
Tipo: Text
Palavras-chave: France; Marennes Oleron; Geographical repartition; Crepidula fornica; Répartion géographique; Marennes Oléron; Crepidula fornicata; Crépidules.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/acte-2950.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

Variations saisonnières in situ de la production et de la composition des biodépots de trois mollusques estuariens (Mytilus edulis, Crassostrea gigas, Crepidula fornicata)
Provedor de dados: 5
Autores: Deslous-paoli, Jean-marc; Sornin, Jean-marc; Heral, Maurice.
The biodeposition was quantified on the field with sediment traps. All over the year, the biodeposition was the lowest for Crepidula fornicata. Mytilus edulis rejected more biodeposits during winter, and Crassostrea gigas during spring and autumn. The percentage of organic matter sonsumed and digested was higher during summer. The constituttive elements of the digested organic matter was not always the same, all over the year. The energy content of the digest fraction was higher in spring. For Mytilus edulis the ration intake was higher in winter and spring, related with the gametogenetic ans spawning period. An analysis of the mineral constutents of the natural food was made.
Tipo: Text
Palavras-chave: Crepidula fornicata; Crassostrea gigas; Mytilus edulis; Digestibility; Biodeposition; Crepidula fornicata; Crassostra gigas; Mytilus edulis; Digestibilité; Biodéposition.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/publication-2691.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

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