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Registros recuperados: 34
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One Perkinsus species may hide another: characterization of Perkinsus species present in clam production areas of France ArchiMer
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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Rapport d'activité année 1979 du Laboratoire de Biologie Conchylicole de La Tremblade ArchiMer
Heral, Maurice.
Rapport d'activité du Laboratoire de Biologie Conchylicole de La Tremblade concernant l'année 1979
Tipo: Text Palavras-chave: Conchyliculture; Physiologie; Crassostrea gigas; Mytilus edulis; Reproduction; Estimation stock; Croissance; Ruditapes decussatus; Ruditapes philippinarum; Marennes Oléron.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00070/18088/15636.pdf
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Trophic relationships between benthic or planktonic microphytes and infaunal bivalve molluscs ArchiMer
Plantecuny, M; Bodoy, Alain.
In order to estimate energetic relationship, microphytic and benthic bivalve levels of a shallow (1.5 m), sandy ecosystem near Marseille (Gulf of Fos, Southern France) were sampled monthly during 1.5 year, in two sites differing by their wave exposure. In the sheltered area, the bivalve Ruditapes decussatus was the dominant species, while another bivalve, Donax trunculus , was found in the open, wave exposed site. Chlorophyll a and primary production of the phytoplankton and the microphytobenthos, as well as population dynamic, growth and biochemical composition of bivalves (lipids, proteins and carbohydrates) were monitored.
Tipo: Text Palavras-chave: Ruditapes decussatus; Bivalvia; Periphyton; Phytoplankton; Biochemical composition; Growth; Marine molluscs; Hydrodynamics; Seasonal variations; Primary production; Trophic relationships.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-1528.pdf
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The reproductive cycle of the European clam Ruditapes decussatus (L., 1758) in two Portuguese populations: Implications for management and aquaculture programs ArchiMer
Matias, Domitilia; Joaquim, Sandra; Matias, Ana Margarete; Moura, Paula; Sousa, Joana; Sobral, Paula; Leitao, Alexandra.
The reproductive cycle, as well as its nutrient storage and utilization, of two populations of Ruditapes decussatus from the main production areas of this species: Ria de Aveiro and Ria Formosa Lagoon (Portugal) were studied here over a 24 month period (May 2010-April 2012). The reproductive cycle of both populations of R. decussatus followed an annual cyclicality that comprised a ripe stage in spring followed by a spawning period that began in late spring and extended throughout summer until early autumn. This extended and continuous spawning period may be an advantageous strategy for this species by ensuring a continuous supply of gametes. Moreover, R. decussatus can adopt different reproductive strategies depending on the geographical origin. The...
Tipo: Text Palavras-chave: European clam; Ruditapes decussatus; Reproductive cycle; Portuguese populations; Biochemical composition; Seasonal variations.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00152/26292/25461.pdf
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Diagnostic quantitatif de Perkinsus atlanticus (Apicomplexa, Perkinsea) chez les palourdes Ruditapes decussatus et Ruditapes philippinarum ArchiMer
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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Comparaison de la respiration chez Ruditapes decussatus (L.) et R. philippinarum (Adams & Reeve) en fonction de la température ArchiMer
Bodoy, Alain; Riva, Alain; Maitre-allain, Thierry.
Measurements of oxygen consumption in the two species Ruditapes decussatus and Ruditapes phi/ippinarum were perfonned using hatchery-reared juveniles, grown under controlled conditions. The temperature range varied from 10 to 30°C. The linear relations between the logarithms of the dry weight and of the oxygen consumption were calculated for each species. Rates were compared in terms of standardized clam tissue weight calculated from the regression of respiration on tissue weight. Such a technique allows to make comparisons between the species by avoiding any interference from the variations in individual weight. Within this range of temperature, oxygen consumption of R. philippinarum and of R. decussatus exhibit the same variations, with a maximum at...
Tipo: Text Palavras-chave: Temperature; Oxygen consumption; Ruditapes philippinarum; Ruditapes decussatus; Température; Consommation oxygène; Ruditapes philippinarum; Ruditapes decussatus.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/publication-2963.pdf
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Ecologie du copépode calanoïde Paracartia grani. Implication dans le cycle de vie du parasite Marteilia refringens dans la lagune de Thau ArchiMer
Boyer, Séverine.
In this study, the life cycle of Paracartia grani, a calalloid copepod belonging to the Acartiidae family was determined in Thau lagoon. Indeed, the copepod involvement in the life cycle of the parasite Marteilia refringens affecting the bivalve productions is suspected. Mesozooplanktonic community .was monitored twice a month. over two years at a fixed station in the lagoon. Sampling has identified P. grani as the acartiid dominant species in summer. From April to January, the copepod is found in the water column while from February to early April it remains in the sediment as diapausing eggs. The analysis of the population structure (size spectmm, contribution of developmental stages and sex ratio) has revealed that there are in between 6 and 9...
Tipo: Text Palavras-chave: Paracartia grani; Cycle de vie; Production d'oeufs; Oeufs de diapause; Mésozooplancton; Marteilia refringens; Mytilus galloprovincialisa; Ruditapes decussatus; PCR; Hybridation in situ; Lagune de Thau; Paracartia grani; Life cycle; Egg production; Diapause eggs; Mesozooplankton; Marteilia refringens; Mytilus galloprovincialis; Ruditapes decussatus; PCR; In situ hybridization; Thau lagoon.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00118/22931/21482.pdf
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Etude d'un Microorganisme de Type Chlamydien chez la Palourde Ruditapes Decussatus L. ArchiMer
The authors study a chlamydial micro-organism parasite of the digestive epithelium of the carpet shell Ruditapes decussatus. The action of this microorganism seems of little import : the intracellular infection is limited to a small number of cells and does not cause any serious lesion in the digestive epithelium.
Tipo: Text Palavras-chave: Ruditapes decussatus; Digestive system; Lesions; Parasitism; Histology; Microorganisms; Diseases.
Ano: 1980 URL: http://archimer.ifremer.fr/doc/1980/publication-1934.pdf
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Elevage de palourdes sous filet en mileu fermé ArchiMer
Peyre, Roger; Zanette, Yvan; Heral, Maurice.
Japanese clam (Ruditapes philippinarum) and European clam (Ruditapes decussates) farming based on spat produced in hatcheries has gone beyond the experimental stage on the Atlantic coasts since the research of Latrouite et Claude (1976), Lucas (1977), Flassch (1979), Dréno (1979) and Gras (soon to be published). It has thus become necessary to develop farming procedures reliable enough to be handed over to the professionals in the business.
Tipo: Text Palavras-chave: Marennes Oléron; Ruditapes decussatus; Ruditapes philippinarum; Elevage; Palourdes.
Ano: 1980 URL: http://archimer.ifremer.fr/doc/1980/publication-3006.pdf
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Etude et optimisation des cultures cellulaires de Perkinsus olseni parasite de la palourde ArchiMer
Guenn, Julien.
La conchyliculture connaît depuis une trentaine d'années une progression régulière de ses productions à travers le monde. Elle représente une activité économique importante avec plus de 240 000 tonnes de coquillage produit annuellement en France. Cependant le développement de cette activité peut être limité par des mortalités parfois massives dues à des maladies infectieuses. L'augmentation des productions peut être expliquée par l'amélioration des méthodes d'élevage grâce à une meilleure connaissance de la biologie des bivalves et des processus physiologiques liés à leur reproduction : l'apparition de l'élevage larvaire en écloserie a permis de pallier le caractère aléatoire et souvent insuffisant du captage naturel. Ces nouvelles techniques ont permis...
Tipo: Text Palavras-chave: Biologie cellulaire; Parasite; Perkinsus olseni; Culture cellulaire; Palourde; Ruditapes decussatus; Ruditapes philippinarum.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/00033/14457/11759.pdf
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Induced triploidy in the European clam, Ruditapes decussatus (L.) and performance of triploid larvae ArchiMer
Gerard, Andre; Naciri, Yamama; Noiret, Christophe; Ledu, Christophe; Peignon, Jean-marie.
For the first time, effective treatments using cytochalasin B were developed to induce triploidy in the European clam, Ruditapes decussatus (L.). The percentage of triploid embrios was assessed by karyological or image analysis. Two treatments (O.5 or 1 mg of cytochasin B (CB per ml of dimethylsulfoxide in 1 l of sea water) were applied at different times after fertilization (10 to 25 mn), for two different periods (15 and 20 min). Best results were obtained for a CB concentration of 1 mg/l. When treatment was applied 15 min after fertilization for a 20 min period, 94% and 95% of triploid embryos were obtained in two repeated experiments. At metamorphosis, the treated larvae appeared to be no smaller than the control larvae in all experiments. Thowever, in...
Tipo: Text Palavras-chave: Genetic; Ruditapes decussatus; Clam; Induced triploidy.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/publication-3208.pdf
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Rapport annuel d'activité 1981 du Laboratoire Cultures Marines et Aménagement du Littoral de La Tremblade ArchiMer
Heral, Maurice.
Rapport d'activité du Laboratoire Cultures Marines et Aménagement du Littoral de La Tremblade concernant l'année 1981
Tipo: Text Palavras-chave: Conchyliculture; Production; Gisement naturel; Estimation stock; Production; Valorisation claires ostréicoles; Culture palourde; Sélection génétique; Crassostrea gigas; Ruditapes decussatus; Ruditapes philippinarum; Marennes Oléron.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/00070/18119/15667.pdf
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Optimisation du diagnostic et épidémiologie de la maladie de l'anneau brun sur la côte Atlantique ArchiMer
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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Feeding and digestion with bivalves ArchiMer
Deslous-paoli, Jean-marc.
On the contrary to the U. S. where they represent but 4.6% of the total marine production , mollusc, principally bivalves, can no longer be considered as a marginal production. In France, 100 000 ton of oysters, 98% of which is represented by Crassostrea gigas (Héral & al., 1985) and 85 000 ton of mussels (Mytilus edulis, Mytilus edulis galloprovincialis) (Dardignac, 1985) are produced yeraly. Elsewhere, new rearings are being developed, such as pectinidae and Ruditapes philippinarum, on the Atlantic and Mediterranean coasts. The species presently cultured, some of which dependiing only on natural collections (Crassostrea gigas, Mytilus edulis, Mytilus galloprovincialis while others depend on hatchery production, either partially Crasssotrea gigas in...
Tipo: Text Palavras-chave: Ruditapes decussatus; Ostrea edulis; Mytilus edulis; Crassostrea gigas; Bivalves; Physiology; Digestion; Feeding.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/acte-7476.pdf
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Contribution à la biologie de la palourde Ruditapes decussatus L. ArchiMer
Joly, Jean-pierre.
Cette étude traite de l'anatomie, la pathologie et la physiologie de la palourde Ruditapes decussatus L., mollusque bivalve fouisseur d'intérêt commercial.
Tipo: Text Palavras-chave: Anatomie; Cytologie; Histologie; Bactérie; Parasite; Ruditapes decussatus.
Ano: 1982 URL: http://archimer.ifremer.fr/doc/00118/22937/20761.pdf
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A microarray-based analysis of oocyte quality in the European clam Ruditapes decussatus ArchiMer
De Sousa, Joana Teixeira; Milan, Massimo; Pauletto, Marianna; Bargelloni, Luca; Joaquim, Sandra; Matias, Domitilia; Matias, Ana Margarete; Quillien, Virgile; Leitao, Alexandra; Huvet, Arnaud.
A microarray-based analysis was performed with the objective of describing genomic features of oocytes and looking for potential markers of oocyte quality in the economically important European clam, Ruditapes decussatus. Oocytes of 25 females from Ria de Aveiro, Western coast of Portugal (40°42′N; 08°40′W) were selected for this study and oocyte quality was estimated by success of D-larval rate under controlled conditions, which appeared to vary from 0 to 95 %. By genome-wide expression profiling with a DNA microarray, 526 probes appeared differentially expressed between two groups representing the largest and smallest value of D larval rates, named good (represented by a mean D-larval yield of 57 ± 22%) and poor (9 ± 5%) quality oocytes. Enrichment...
Tipo: Text Palavras-chave: Ruditapes decussatus; Oocyte; Developmental success; Gene expression; Marine bivalve; Transcriptomics.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00260/37147/35676.pdf
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Elevages de bivalves à partir de naissain d'écloseries dans les claires du bassin de Marennes-Oléron ArchiMer
Gras, Paul; Gras, Marie-paule.
Des élevages expérimentaux d'huîtres plates Ostrea edulis et de palourdes Ruditapes decussatus et Ruditapes philippinarum ont été réalisés dans les claires à huîtres du bassin de Marennes-Oléron à partir de naissain provenant d'écloserie. Les croissances pondérale et linéraire et le pourcentage de mortalité ont été étudiés. Les premiers résultats obtenus sont encourageants, et, plusieurs ostréiculteurs ont commencé, cette année, avec notre assistance, la culture des palourdes dans leurs claires à huîtres.
Tipo: Text Palavras-chave: Ostréiculture; Huître; Palourde; Ostrea edulis; Ruditapes decussatus; Ruditapes philippinarum; Claire ostréicole; Marennes Oléron; Charente Maritime.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00009/12010/8702.pdf
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Estimation des stocks de palourdes Ruditapes decussatus, Ruditapes philippinarum sur l'estran oléronais du bassin de Marennes-Oléron. Juin 2009 ArchiMer
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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New evidence for the involvement of Paracartia grani (Copepoda, Calanoida) in the life cycle of Marteilia refringens (Paramyxea) ArchiMer
Boyer, S.; Chollet, Bruno; Bonnet, D.; Arzul, Isabelle.
The dynamics of the protozoan parasite Marteilia refringens was studied in Thau lagoon, an important French shellfish site, for 1 year in three potential hosts: the Mediterranean mussel Mytilus galloprovincialis (Mytiliidae) the grooved carpet shell Ruditapes decussatus (Veneriidae) and the copepod Paracartia grani (Acartiidae). Parasite DNA was detected by PCR in R. decussatus. In situ hybridisation showed necrotic cells of M. refringens in the digestive epithelia of some R. decussatus suggesting the non-involvement of this species in the parasite life cycle. In contrast, the detection of M. refringens in mussels using PCR appeared bimodal with two peaks in spring and autumn. Histological observations of PCR-positive mussels revealed the presence of...
Tipo: Text Palavras-chave: Marteiliosis; Marteilia refringens; Parasite life cycle; Mytilus galloprovincialis; Ruditapes decussatus; Paracartia grani; PCR; In situ hybridisation.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00157/26795/25532.pdf
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Ultrastructural study of sporulated instars of a haplosporidian parasitizing the clam Ruditapes decussatus ArchiMer
Chagot, Dominique; Bachere, Evelyne; Ruano, Francisco; Comps, Michel; Grizel, Henri.
In 1951, Vilela pointed out the presence of a haplosporidian parasitizing Ruditapes decussatus from Portuguese waters and created the species Haplosporidium tapetis. Later, a haplosporidian was found in the same species originating from the pound of Thau (France).
Tipo: Text Palavras-chave: Haplosporidian paratizing; Ruditapes decussatus; Pathology.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/acte-3110.pdf
Registros recuperados: 34
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