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| Registros recuperados: 80 | |
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| Almeida, Manuela. |
| Le protozoaire parasite Perkinsus atlanticus (Azevedo, 1989) est une des causes des chutes de production de palourdes Ruditapes decussatus et R. philippinarum cultivées au Portugal, en Espagne et en Italie. Des modèles d'infection de Perkinsus ont été réalisés, par reproduction expérimentale de la maladie, pour étudier le rôle de la densité des palourdes, de la température et de la salinité sur le déroulement de la Perkinsiose. L'objectif de ce travail a été de développer une technique de diagnostic quantitative pour optimiser l'évaluation de l'intensité d'infection et détecter de faibles infections des palourdes par P. atlanticus. Le principe de cette technique consiste à cultiver tous les tissus de la palourde en milieu thioglycolate, suivi d'une lyse à... |
| Tipo: Text |
Palavras-chave: Pathologie; Protozoaire; Parasite; Perkinsus atlanticus; Bivalvia; Ruditapes decussatus; Ruditapes philippinarum; Diagnostic. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00033/14416/11710.pdf |
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| Arzul, Isabelle; Chollet, Bruno; Michel, Justine; Robert, Maeva; Garcia, Celine; Joly, Jean-pierre; Francois, Cyrille; Miossec, Laurence. |
| Although clam populations in France are known to be infected with protozoans of the genus Perkinsus, no molecular characterization was previously performed on these parasites. Considering that several members of this genus have been associated with mortalities of molluscs worldwide, a study was undertaken in order to characterize these parasites in France. For that purpose, clams, Ruditapes philippinarum and R. decussatus, collected from different production areas and found to be infected with Perkinsus sp. in thioglycolate culture medium, were selected for PCR-RFLP tests and sequencing. Perkinsus olseni was detected in all the investigated areas and results also suggested the presence of P. chesapeaki in Leucate, a lagoon on the Mediterranean coast and in... |
| Tipo: Text |
Palavras-chave: Clam parasites; Perkinsus chesapeaki; Perkinsus olseni; Ruditapes philippinarum; Ruditapes decussatus; Ribosomal RNA; Actin; ISH. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00094/20542/18205.pdf |
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| Baud, Jean-pierre. |
| Du naissain de palourde japonaise et d'huître creuse a été prégrossi en conditions intensives de nourricerie au moyen d'une eau salée souterraine, utilisée comme ressource thermique et comme source de sels nutritifs pour la production d'algue fourrage. Les paramètres essentiels du milieu ont été suivis et les conditions d'élevage ont été contrôlées (densité de naissain, débit d'eau de mer, concentration de phytoplancton et température). Les résultats biologiques obtenus après traitement des interactions et de la hiérarchie des paramètres étudiés ont fait l'objet d'une analyse économique, pour chaque saison, par rapport à différentes stratégies de prégrossissement des coquillages. Cette étude permet finalement de proposer une méthodologie intensive de... |
| Tipo: Text |
Palavras-chave: Baie de Bourgneuf; Ruditapes philippinarum; Crassostrea gigas; Prégrossissement; Nourricerie; Culture intensive. |
| Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/00048/15892/13314.pdf |
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| Baud, Jean-pierre; Glize, Philippe; Haure, Joel; Garnier, Jacqueline. |
| Dans un élevage Intensif en claires expérimentales de palourdes japonaises semées à la taille de 28 mm et aux densités de 100, 200 et 300/m2, différentes rations alimentaires de la diatomée Skeletonema costatum. cultivée à partir d'eau salée souterraine, ont été testées de mars à novembre 1988. Pour la densité 100/m2, le taux de croissance n'est pas significativement différent avec des concentrations de pigment dans l'eau injectée comprises entre 31 et 126 µg.l(1) de Chia. Toutefois celui-ci est 1,5 fois supérieur à celui observé dans la claire témoin. Avec 1.8 kg.m-2 la biomasse finale représente 2 fois la charge récoltée dans la claire extensive. Après analyse, la densité de 300/m2 semble être le meilleur compromis pour l'élevage intensif même si la... |
| Tipo: Text |
Palavras-chave: Aquaculture intensive; Palourde japonaise; Ruditapes philippinarum; Marais maritime; Zootechnie; Densité; Croissance; Biomasse; Production; Rendement. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00048/15885/13307.pdf |
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| Beguier, Jeremy. |
| A l'échelle nationale, la conchyliculture a connu des épizooties catastrophiques ; l'huître portugaise (Crassostrea angulata) a disparu des côtes françaises, suite à des infections impliquant des iridovirus. L'huître plate (Ostrea edulis) a vus sa production fortement réduite suite à l'introduction de deux maladies parasitaires, la bonamiose et la marteiliose. La maladie de l'anneau brun, maladie d'origine bactérienne due à Vibrio tapetis a engendré depuis 1987 en Europe des mortalité allant de 60 à 80% dans les élevages, écloseries et bancs naturels de palourdes japonaises Ruditapes philippinarum et de palourdes européennes R. decussatus, compromettant le développement de cette filière aquacole. Cette étude a pour but d'obtenir une image de la maladie de... |
| Tipo: Text |
Palavras-chave: Palourdes; Ruditapes philippinarum; Ruditapes decussatus; Anneau brun; Vibrio tapetis; Biologie moléculaire. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/00034/14480/11780.pdf |
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| Bordeyne, François; Robert, Stephane; Le Moine, Olivier; Leaute, Jean-pierre. |
| On French coast, Manila clam is a bivalve subject of a large activity recreational and professional hand harvest. Two species are represented in France, European Manila clam Ruditapes decussatus (native) and Japanese Manila clam Ruditapes philippinarum (introduced). Predominance of this last species (more than 90 % of number and biomass), earn them the status of invasive species. Contrary to Arcachon bay, Pont l’Abbé River or Morbihan bay, an estimation campaign of Manila clams stock on Marennes-Oléron bay had never been carried out. The objective of this study: estimate, in number and biomass, the Manila clams stock of two areas. The first affect recreational hand harvest, on Saint-Trojan shore (0.8 km²) whereas the second scopes professional hand... |
| Tipo: Text |
Palavras-chave: Palourde; Ruditapes philippinarum; Ruditapes decussatus; Estimation; Stock; Marennes–Oléron.; Manilla clam; Ruditapes philippinarum; Ruditapes decussatus; Estimation; Stock; Marennes–Oleron. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00415/52621/53459.pdf |
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| Breton, Gildas; Baud, Jean-pierre; Haure, Joel. |
| Après les études de mise au point de la technique intensive réalisées en 1988 et 1989 sur des bassins expérimentaux de 30 m2, une optimisation de cette méthode d'élevage a été faite sur deux claires de 200 m2 avec les normes zootechniques suivantes: densité = 300 palourdes x m-2, concentration d'eau de mer enrichie en Skeletonema costatum produit à partir d'eau salée souterraine = 300 cellules/µl ou 126 µg/l de chla, taux de renouvellement = 100 % du volume par jour. En 8 mois d'élevage, le poids moyen des palourdes est passé de 5,5 g à 19,3 g, soit un rendement de 4,53 kg/m2 pour une production finale de 1,86 tonne, avec une chair de qualité satisfaisante, riche en glycogène et ayant un indice de condition de 94. Aucune trace d'anneau brun n'a été... |
| Tipo: Text |
Palavras-chave: Aquaculture intensive; Marais maritime; Ruditapes philippinarum; Skeletonema costatum; Eau salée souterraine; Asperseur. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00048/15880/13302.pdf |
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| Caill-milly, Nathalie; Duclercq, Benoit; Morandeau, Gilles. |
| Between 1980 and 1986, some Arcachon oyster farmers took up breeding the Japanese clam on the foreshore (Robert et Deltreil, 1990). This production was short lived. The steep fall in prices due to economic competition from Spain, Portugal, Italy and Tunisia, predator action such as the trigger fish (Popovsky et al., 1999), added to the significant amount of mortality that occurred in the summer and autumn of 1992 that affected two-thirds of the total stock, led to clam farming being abandoned at the end of the 1980s. In the Arcachon basin, the Japanese clam (Ruditapes philippinarum) population, now natural to the area, has found favourable conditions for development and is expanding rapidly there. This species has been supplanting the local species... |
| Tipo: Text |
Palavras-chave: Ruditapes philippinarum; Veneridae; Popluation structure; Biomass; Stock assessment; Arcachon Bassin; Veneridae; Ruditapes Philippinarum; Bivalvia; Mollusca; Structure Population; Biomasse; Abondance; Evaluation Stock. |
| Ano: 2006 |
URL: https://archimer.ifremer.fr/doc/2006/rapport-2218.pdf |
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| Choquet, Gwenaelle; Soudant, P; Lambert, C; Nicolas, Jean-louis; Paillard, C. |
| Vibrio tapetis is the causative agent of brown ring disease (BRD), which affects a species of clam, Ruditapes philippinarum. After incubation with V. tapetis, hemocytes lose filopods and become rounded, indicating cytotoxic activity of the bacterium. To rapidly quantify this cytotoxicity, a flow-cytometry test was developed based on the capacity of V tapetis to inhibit adhesion of clam hemocytes to plastic. Several bacteria:hemocyte ratios, the cytotoxicity of other Vibrio spp. pathogenic to bivalves, and that of various V. tapetis isolates were tested. Inhibition of adherence is detectable with as few as 5 bacteria per hemocyte. The greater cytotoxic activity of V tapetis compared to that of V splendidus and V pectenicida suggests a specific pathogenicity... |
| Tipo: Text |
Palavras-chave: Cytotoxicity; Flow cytometry; Vibrio tapetis; Ruditapes philippinarum; Bivalve hemocytes; Pathogenicity. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00000/10761/7590.pdf |
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| Chouba, L.; Zamouri-Langar, N.; Jarboui, O.; Mrabet, R.. |
| Dans cette étude nous signalons la présence d’une espèce d’origine indo-pacifique, Ruditapes philippinarum, sur les côtes tunisiennes, dans le golfe de Gabès. Les échantillons prélevés ont montré des pourcentages de 89 pour l’espèce indigène Ruditapes decussatus et 11 pour l’espèce exotique Rudiapes philippinarum à Gargour (au sud de Sfax); alors que ces pourcentages sont respectivement de 21,5 et de 78,5 au nord de cette région, à El Aouabed. |
| Tipo: Journal Contribution |
Palavras-chave: Ruditapes philippinarum; Geographical distribution; New records; Marine molluscs; Geographical distribution; Http://aims.fao.org/aos/agrovoc/c_5083. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/4274 |
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| Copp, Gordon H.; Vilizzi, Lorenzo; Tidbury, Hannah; Stebbing, Paul D.; Trakan, Ali Serham; Miossec, Laurence; Goulletquer, Philippe. |
| Electronic decision-support tools are now an essential component of government strate gies to battle non-native species, with taxon-specific, paper-based risk analysis schemes often being replaced by taxon-generic tools. This study reports on the development of a decision-support tool for aquatic species, the Aquatic Species Invasiveness Screening Kit (AS-ISK), which replaces five taxon-specific toolkits for amphibians, freshwater and marine fish and invertebrates (FISK, MFISK, FI-ISK, MI-ISK, Amph-ISK). Adapted from Pheloung et al.’s. Weed Risk Assessment (WRA), the “-ISK” toolkits were also “self-automated workbooks” in Excel® VisualBasic® architecture of the ’WRA. In creating AS-ISK, we incorporated the conceptual approach (questions and guidance) of... |
| Tipo: Text |
Palavras-chave: Risk analusis; Marine; Brackish; FISK; Ruditapes philippinarum. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00357/46770/46638.pdf |
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| Dang, C; De Montaudouin, X; Gonzalez, P; Mesmer Duldons, N; Caill-milly, Nathalie. |
| We describe an emerging pathology, brown muscle disease (BMD), which specifically affects the Manila clam Ruditapes philippinarum in Arcachon Bay (France). BMD induces a transformation of the posterior adductor muscle, which becomes infused by conchiolin and calcified, reducing the ability of clams to bury. The disease affects both types of muscular tissue, with striated muscle becoming affected to a higher degree than smooth muscle. Two indices were created to quantify the symptoms: the Muscle Print Index, used for empty and live shells, and the Final Disease Index, utilized for live clams only. Histological sections were made and observed under light microscopy to examine the muscular damage and to investigate a causal agent. Sections revealed an... |
| Tipo: Text |
Palavras-chave: Light microscopy; Pathology; Adductor muscle; Ruditapes philippinarum; Clam; Brown muscle disease. |
| Ano: 2008 |
URL: https://archimer.ifremer.fr/doc/2008/publication-4556.pdf |
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| Dang, C.; Gonzalez, P.; Mesmer-dudons, N.; Bonami, J-r; Caill-milly, Nathalie; De Montaudouin, X.. |
| Recently, Manila clam, Ruditapes philippinarum, populations have suffered mortalities in Arcachon Bay (SW France). Mortality was associated with extensive lesions of the posterior adductor muscle, which become progressively brown and calcified. Ultrastructural observations by transmission electron microscopy revealed tissue degradation with necrotized muscle fibres and granulocytomas. Unenveloped virus-like particles (VLPs) were detected in muscle, granulocytic, epithelial and rectal cells. VLPs were abundant in the extracellular space, in the cytoplasm (free or enclosed in vesicles) and in the nucleoplasm of granulocytes. Nuclei and mitochondria of granulocytes displayed changes which suggested reactive oxygen species production and apoptosis induction.... |
| Tipo: Text |
Palavras-chave: Adductor muscle; Apoptosis; Brown muscle disease; Necrosis; Ruditapes philippinarum; Transmission electron microscopy. |
| Ano: 2009 |
URL: https://archimer.ifremer.fr/doc/00000/11130/7991.pdf |
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| Dang, C.; Sauriau, Pierre-guy; Savoye, N.; Caill-milly, Nathalie; Martinez, P.; Millaret, C.; Haure, Joel; De Montaudouin, X.. |
| Spatial changes in the dietary regime of Ruditapes philippinarum from intertidal sediments of Arcachon Bay were depicted by analyzing stable isotope ratios in both its adductor muscles and potential trophic sources. Manila clams were collected from 50 sites in May to June 2006. Dietary reconstruction was based on the IsoSource mixing model, considering trophic enrichments of 3.5%. for carbon and 3.0%. for nitrogen, which were determined experimentally. delta C-13 and delta N-15 values, respectively, averaged -28.2 and 5.2 parts per thousand for riverine particulate organic matter (POM), -20.6 and 4.7 parts per thousand for inner bay phytoplankton, -21.0 and 5.6%. for outer bay phytoplankton, -16.8 and 4.8 parts per thousand. for microphytobenthos, -18.4... |
| Tipo: Text |
Palavras-chave: SW France; Arcachon Bay; Spatial variability; Mixing model; Trophic sources; C and N stable isotopes; Muscle; Ruditapes philippinarum. |
| Ano: 2009 |
URL: https://archimer.ifremer.fr/doc/2009/publication-6886.pdf |
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| Registros recuperados: 80 | |
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