Consulta: subjectFacets:"Ruditapes decussatus"
Registros recuperados: 34
Data/hora: 29/05/2024 04:35:09

Correlation between perkinsosis and growth in clams Ruditapes spp.
Provedor de dados: 5
Autores: Dang, Cecile; De Montaudouin, Xavier; Binias, Cindy; Salvo, Flora; Caill-milly, Nathalie; Bald, Juan; Soudant, Philippe.
Perkinsosis is one of the most widespread diseases affecting commercially important species of molluscs globally. We examined the impact of Perkinsus spp. on shell growth at the individual scale in 2 clam species: Ruditapes decussatus from Mundaka Estuary (Spain) and R. philippinarum from Arcachon Bay (France). At Arcachon, 2 contrasting sites in terms of environment and Perkinsus olseni presence were chosen: Arguin (disease-free) and Ile aux Oiseaux (infected site). We monitored the dynamics of perkinsosis over the course of the experiment at Mundaka and Ile aux Oiseaux. Prevalences were high (&gt;70%), and intensities were around 10(5) cells g(-1) wet gills at Ile aux Oiseaux, and 10(6) cells g(-1) at Mundaka. No significant differences in prevalence or...
Tipo: Text
Palavras-chave: Clams; Perkinsus spp.; Perkinsus olseni; Ruditapes philippinarum; Ruditapes decussatus; Growth.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00166/27733/25951.pdf

Rapport annuel d'activité 1981 du Laboratoire Cultures Marines et Aménagement du Littoral de La Tremblade
Provedor de dados: 5
Autores: 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

One Perkinsus species may hide another: characterization of Perkinsus species present in clam production areas of France
Provedor de dados: 5
Autores: 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

Obtention de souches conchylicoles performantes par polyploïdisation (2ème partie)
Provedor de dados: 5
Autores: Gerard, Andre.
Following a phase of experimental system development, acquisition and improvement of triploidisation techniques carried out in 1989, the 1990 program divides into four main actions:1) significant production of diploid and triploid populations of cupped oysters and Pacific clams in order to compare their performances in French coastal waters2) first trials of triploidy induction in European clam3) development of a ploidy control technique at any stage of the animal life, through digital imaging4) summary of the first trials of tetraploidy induction in C. gigas and R. philippinarum
Tipo: Text
Palavras-chave: Imagerie numérique; Ruditapes decussatus; Ruditapes philippinarum; Crassostrea gigas; Cytogénétique; Tétraploïdie; Triploïdie; Polyploïdie.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/rapport-3855.PDF

Diagnostic quantitatif de Perkinsus atlanticus (Apicomplexa, Perkinsea) chez les palourdes Ruditapes decussatus et Ruditapes philippinarum
Provedor de dados: 5
Autores: 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

Données sur la biologie de Ruditapes philippinarum et Ruditapes decussatus en élevage sur la côte morbihannaise
Provedor de dados: 5
Autores: De Kergariou, Gabriel; Latrouite, Daniel; Perodou, D.; Claude, Serge.
Des essais d'élevage de palourdes en milieu ouvert ont été réalisés sur le littoral morbihannais en 1979 et 1980. R. philippinarum atteint une taille commercialisable au bout de 18 mois à 2 ans suivant le site et la densité au semis. Les taux de survie observés sont supérieurs à 50% pour les essais réalisés en 1979, mais inférieurs pour ceux effectués en 1980. Une mortalité quasi totale de R. decussatus a été observée après 6 mois d'élevage, et la croissance des individus survivants est nettement moins rapide que pour l'espèce précédente. Les résultats montrent que R. philippinarum est mieux adaptée, et ils permettent de proposer un protocole d'élevage pour le secteur considéré.
Tipo: Text
Palavras-chave: Palourdes; Biologie; Ruditapes philippinarum; Ruditapes decussatus; Elevage; Morbihan.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00021/13258/10305.pdf

Obtention de souches conchylicoles performantes par polyploïdisation (3ème partie)
Provedor de dados: 5
Autores: Gerard, Andre; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Noiret, Christophe; Bodoy, Alain; Heurtebise, Serge; Garnier, Jacqueline.
The third part of the polyploidisation program of the main French species of commercial interest, this report presents the actions and results for the year 1991 which was devoted to:- continuation of the development trials of the triploidy induction technique in Ruditapes decussates (i.e. indigenous clam)- production of diploid and triploid populations of Ostrea edulis (i.e. flat oyster)- control of diploid and triploid population performances in cupped oyster and Pacific clam in their natural habitat- continuation of the development of a ploidy control technique through image analysis- beginning of the development of a new polyploidy induction technique in bivalve molluscs
Tipo: Text
Palavras-chave: Ruditapes decussatus; Ostrea edulis; Ruditapes philippinarum; Crassostrea gigas; Imagerie numérique; Cytogénétique; Polyploïdie.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/rapport-3857.PDF

Caractérisation moléculaire du parasite du genre Perkinsus infectant les palourdes en France et étude du polymorphisme génétique en fonction de son origine géographique
Provedor de dados: 5
Autores: Michel, Justine.
En 2004 et 2005, une étude menée par le REPAMO (Réseau de Pathologie des Mollusques) a montré que des parasites du genre Perkinsus étaient présentas au sein des principaux domaines français de production de palourdes: La Mer Méditerranée, l'Océan Atlantique et la Manche avec une forte prévalence amis aucun cas de mortalités associées. Cependant, ces résultats doivent être complétés par des analyses moléculaires plus spécifiques de façon à déterminer la ou les espèces de Perkinsus détectés. D'autre, part, l'étude a montré que différents facteurs environnementaux (température, salinité...) liés à la répartition géographique influencent le développement de parasite. Ces résultats suggèrent l'existence d'une variabilité génétique chez le ou les parasites du...
Tipo: Text
Palavras-chave: Parasite; Perkinsus; PCR; Ruditapes decussatus; Ruditapes philippinarum; Variabilité génétique.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00033/14453/11754.pdf

Optimisation du diagnostic et épidémiologie de la maladie de l'anneau brun sur la côte Atlantique
Provedor de dados: 5
Autores: 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

A microarray-based analysis of oocyte quality in the European clam Ruditapes decussatus
Provedor de dados: 5
Autores: 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

Etude d'un Microorganisme de Type Chlamydien chez la Palourde Ruditapes Decussatus L.
Provedor de dados: 5
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

Trophic relationships between benthic or planktonic microphytes and infaunal bivalve molluscs
Provedor de dados: 5
Autores: 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

Etude ecophysiologique de quelques mollusques bivalves
Provedor de dados: 5
Autores: Riva, A; Masse, H.
Using an experimental flowing system, the filtration rate of Mytilus galloprovincialis, Ostrea edulis, Ruditapes decussatus and Ruditapes aureus has been measured by an indirect technique under Mediterranean thermal conditions in coastal open sea. The oxygen consumption and excretion rate of ammonia have been estimated and influence of temperature and salinity tested for M. galloprovincialis . The results are discussed and compared to literature data.
Tipo: Text
Palavras-chave: Ruditapes decussatus; Ostrea edulis; Mytilus galloprovincialis; Bivalvia; Respiration; Excretion; Oxygen consumption; Water filtration; Ecophysiology; Méditerranéee; Excrétion; Respiration; Filtration; Bivalves.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1177.pdf

Comparaison de la respiration chez Ruditapes decussatus (L.) et R. philippinarum (Adams &amp; Reeve) en fonction de la température
Provedor de dados: 5
Autores: 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

Elevages de bivalves à partir de naissain d'écloseries dans les claires du bassin de Marennes-Oléron
Provedor de dados: 5
Autores: 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

Contribution à la biologie de la palourde Ruditapes decussatus L.
Provedor de dados: 5
Autores: 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

Histological study of a cellular reaction in Ruditpaes decussatus infected by a protozoan
Provedor de dados: 5
Autores: Chagot, Dominique; Comps, Michel; Boulo, Viviane; Ruano, Francisco; Grizel, Henri.
An infection caused by a Perkinsus -like parasite has been observed in Ruditapes decussatus from Portugal (Comps and Chagot, 1987). Following a pathological study carried out on clams affected by mortalities in the Algarve area, this parasite was found again, inducing a reaction process in the host. Histological examination reveals the parasite in the connective tissue of different organs. The adjoining tissues, particularly the epithelia, are not affected.
Tipo: Text
Palavras-chave: Cells; Histology; Pathology; Ruditapes decussatus.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-3109.pdf

New evidence for the involvement of Paracartia grani (Copepoda, Calanoida) in the life cycle of Marteilia refringens (Paramyxea)
Provedor de dados: 5
Autores: 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

Etude et optimisation des cultures cellulaires de Perkinsus olseni parasite de la palourde
Provedor de dados: 5
Autores: 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

Rapport d'activité année 1979 du Laboratoire de Biologie Conchylicole de La Tremblade
Provedor de dados: 5
Autores: 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

Elevage de palourdes sous filet en mileu fermé
Provedor de dados: 5
Autores: 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

Induced triploidy in the European clam, Ruditapes decussatus (L.) and performance of triploid larvae
Provedor de dados: 5
Autores: 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

Obtention de souches conchylicoles performantes par polyploïdisation (4ème partie)
Provedor de dados: 5
Autores: Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Bodoy, Alain; Heurtebise, Serge; Garnier, Jacqueline; Baud, Jean-pierre; Nourry, Max; Haure, Joel; Martin, Anne-genevieve; Claude, Serge; Barret, Jean; Devauchelle, Nicole; Joly, Jean-pierre; Goulletquer, Philippe; Coatanea, Denis; Oheix, Jocelyne; Zanette, Yvan; Blachier, Philippe.
This fourth part of the polyploidisation program reports the experiments that were conducted in 1992 and that were devoted to : - the acquiring of a new method using an epifluroescent microscope - the development o a new technique for inducing polyploidy - the triploidy induction for the Europena clam Ruditapes decussatus - the settlement of performance controls conducted on diploid and triploid populations of Ostrea edulis - results of performance controls conducted on diploid and triploid populations of Crassostrea gigas and Ruditapes philippinarum
Tipo: Text
Palavras-chave: Ruditapes decussatus; Ruditapes philippinarum; Ostrea edulis; Crassostra gigas; Cytongenetics; Polyploidy; Ruditapes decussatus; Ruditapes philippinarum; Ostrea edulis; Crassostrea gigas; Cytogénétique; Polyploïdie.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/rapport-3859.PDF

Estimation des stocks de palourdes Ruditapes decussatus, Ruditapes philippinarum sur l'estran oléronais du bassin de Marennes-Oléron. Juin 2009
Provedor de dados: 5
Autores: 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

Compte-rendu des résultats d'analyses effectuées en histologie - Année 1995
Provedor de dados: 5
Autores: Renault, Tristan; Cochennec, Nathalie; Chollet, Bruno.
Dans le cadre du Réseau zoosanitaires CEE (huître plate) et suivi d'autres espèces, 890 individus provenant des zones 5, 6 et 7 ont été examinés sur l'ensemble de l'année 1995 par différentes techniques : 472 analyses sous coupes histologiques, 328 analyses sur appositions d'organes, 90 analyses sur milieu au thioglycolate.
Tipo: Text
Palavras-chave: Pathologie; Analyse; Histologie; Technique; Bivalves; Ostrea edulis; Huître plate; Mytilus edulis; Ruditapes philippinarum; Ruditapes decussatus; Cerastoderma edule; Mortalité.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00044/15504/12877.pdf

The reproductive cycle of the European clam Ruditapes decussatus (L., 1758) in two Portuguese populations: Implications for management and aquaculture programs
Provedor de dados: 5
Autores: 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

Observations sur le cycle complet d'élevage de palourdes et de clams en surélévation
Provedor de dados: 5
Autores: Latrouite, Daniel; Claude, Serge.
First rearing attempts with the european clams Ruditapes decussatus, the pacific clams Ruditapes philippinarum and the clam Mercenaria mercenaria have been realized by placing the bood into grating cages above the ground. This technic permits a good survival during the so-called "pre-growth" stage. However, if rearing of juveniles is persued beyond 2 centimeters, growth is strongly delayed and mortality increases due to valve distortion and shell infection by parasitic worms.
Tipo: Text
Palavras-chave: Elevage; Palourde; Ruditapes philippinarum; Ruditapes decussatus; Clams; Mercenaria mercenaria; Technique.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00021/13261/10308.pdf

Ultrastructural study of sporulated instars of a haplosporidian parasitizing the clam Ruditapes decussatus
Provedor de dados: 5
Autores: 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

Feeding and digestion with bivalves
Provedor de dados: 5
Autores: 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 &amp; 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

Ecologie du copépode calanoïde Paracartia grani. Implication dans le cycle de vie du parasite Marteilia refringens dans la lagune de Thau
Provedor de dados: 5
Autores: 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

Etude des mécanismes de contamination des mollusques bivalves par des neurotoxines à action rapide (FAT) et développement de procédés de détoxification
Provedor de dados: 20
Autores: Medhioub, Walid.
Cette étude à pour objectif de maîtriser les conditions de culture et de production toxinique chez Karenia selliformis et Alexandrium ostenfeldii dans le but de réaliser des contaminations expérimentales indépendamment du caractère aléatoire des proliférations toxiques en zones côtières. Ce travail vise également à étudier l‘impact de l‘alimentation sur la détoxification artificielle de la pa lourde Ruditapes decussatus contaminée par des gymnodimines et de l‘huître Crassostrea gigas contaminées par des spirolides et enfin d‘étudier l‘impact physiologique de ces micro-algues toxiques au niveau des organes accumulateurs des coquillages. Dans un premier temps, il a été mis en évidence que les performances de croissance de K. selliformis (taux de croissance...
Tipo: Theses and Dissertations
Palavras-chave: DETOXICATION; Gymnodimine; Spirolide; Culture; Karenia selliformis; Alexandrium ostenfeldii; Ruditapes decussatus; Histology; Crassostrea gigas.
Ano: 2011
URL: http://hdl.handle.net/1834/4773

Impact saisonnier de l'environnement sur la structure génétique de trois populations de ruditapes decussatus dans l'ecosystème lagunaire de Bizerte (Tunisie)
Provedor de dados: 20
Autores: Fassatoui, CH.; Mdelgi-Lasram, E.; Moraga, D.; Romdhane, M.S.
في محاولة لتقييم تأثيرالاضطرابات التي يمكن ان تغير التركيبه الجينيه للمحار ببحيره بنزرت، اجريت تحاليل جينيه على عينات من ثلاثة مجموعات. و قد بينت النتائج تواجد علاقة متبادله بين فقدان التنوع ومستويات métallothionéines في خياشيم المحار التي  يمكن ان تكون مرتبطة مع وجود تدرج الانسياب المحمل بالمعادن الثقيلة بين مناطق منزل جميل،فروة والشعرة.
Tipo: Journal Contribution
Palavras-chave: Ruditapes decussatus; Clam culture; Environmental effects; Environmental impact; Heavy metals; Metallothioneins; Population genetics; Toxicity; Environmental impact; Heavy metals; Population genetics; Toxicity; Biomarkers of exposure (organisms); Http://aims.fao.org/aos/agrovoc/c_24420; Http://aims.fao.org/aos/agrovoc/c_2223; Http://aims.fao.org/aos/agrovoc/c_34326; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_36994.
Ano: 2007
URL: http://hdl.handle.net/1834/4258

Perturbations observées chez la palourde "Ruditapes decussatus" et la datte de mer "Lithophaga lithophaga" collect"es au nord de la Tunisie
Provedor de dados: 20
Autores: Jaafar Kefi, F.; Trigui El Menif, N.; Le Pennec, M.
La présente étude a porté sur une anomalie morphologique observée chez la palourde européenne Ruditapes decussatus collectée dans le lac nord de Tunis et des perturbations coquillières relevées chez la datte de mer Lithophaga lithophaga prélevée dans la baie de Bizerte. L’examen de la partie molle et de la coquille de ces deux espèces de bivalves a révélé une malformation chez la palourde européenne  qui consiste en la différenciation de deux siphons inhalant et exhalant surnuméraires prenant naissance des deux siphons habituels, complètement séparés, inhalant et exhalant. Les siphons en forme de Y  possèdent ainsi  4 ouvertures fonctionnelles au lieu de 2.  Chez la datte de mer Lithophaga lithophaga, nous avons relevé la présence de perturbations...
Tipo: Journal Contribution
Palavras-chave: Abnormalities; Animal morphology; Ecology; Shellfish; Shells; Lithophaga lithophaga; Ruditapes decussatus; Http://aims.fao.org/aos/agrovoc/c_48059; Http://aims.fao.org/aos/agrovoc/c_48150.
Ano: 2006
URL: http://hdl.handle.net/1834/4263

Recherche par « RT-PCR » des virus enteriques chez des moules (&lt;Mytilus galloprovincialis&gt;) et des palourdes (&lt;Ruditapes decussatus&gt;)
Provedor de dados: 20
Autores: Aouni, M.; Essebai El Amri, D.
Dans cette étude comparative, deux méthodes d'extraction de quatre types de virus entériques pathogènes pour l’homme (virus de l’hépatite A, l’astrovirus, le norovirus et l’entérovirus) contaminant des moules (Mytilus galloprovincialis) et des palourdes (Ruditapes decussatus) ont été évaluées par l’application de la technique « Perverse Transcriptase- Polymerase Chain Reaction : RT-PCR ». Les échantillons des mollusques bivalves analysés ont été prélevés entre le mois de mars 2000 et le mois de septembre 2001 dans différents sites naturels de la lagune de Bizerte et sans subir l’étape de purification. Les résultats obtenus montrent que le taux de détection des virus par RT-PCR est meilleur lorsque les virus sont extraits à partir de l’estomac et de...
Tipo: Journal Contribution
Palavras-chave: Digestive system; Human food; Infectious diseases; Marine molluscs; Pathogens; Public health; Mytilus galloprovincialis; Ruditapes decussatus; Digestive system; Public health; Infectious diseases; Pathogens.
Ano: 2005
URL: http://hdl.handle.net/1834/3755