Consulta: subjectFacets:"Ruditapes philippinarum"
Registros recuperados: 80
Data/hora: 02/06/2024 14:21:32

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

Analysis of shell colour determinism in the Manila clam Ruditapes philippinarum
Provedor de dados: 5
Autores: Peignon, Jean-marie; Gerard, Andre; Naciri, Yamama; Ledu, Christophe; Phelipot, Pascal.
The Manila clam presents a large polymorphism for shell colours and patterns. No experiment has been conducted to study the determinism of such a polymorphism which has been well known for a long time. The aim of this study was firstly to determine the genetic variation for shell colour and secondly to produce some homozygous lines for the shell colouring. These lines could then be used as controls for laboratory experiments. The colouring is defined by three characters: asymmetry, ornamentation and hue. Clams with asymmetrical colouring are not fully pigmented, except for a posterior band on the left valve. Clams with symmetrical colouring are fully pigmented on the two valves. Four cross series were conducted between the different characters: Asymmetry...
Tipo: Text
Palavras-chave: Mollusque; Bivalve; Palourde; Ruditapes philippinarum; Génétique; Hérédité mendélienne; Coloration; Asymétrie; Mollusc; Bivalve; Manila clam; Ruditapes philippinarum; Genetics; Mendelian inheritance; Colouration; Asymmetry.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/publication-3204.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

Effets de l'apport de phytoplancton (Skeletonema costatum) sur la croissance et les variations de la composition biochimique de la palourde japonaise Ruditapes philippinarum cultivée en marais
Provedor de dados: 5
Autores: Baud, Jean-pierre; Haure, Joel; Garnier, Jacqueline.
A bulk production of phytoplankton (Skelelonema costatum) has been obtained in concrete tanks from saline groundwater. This was used in various concentrations to feed an intensive cultivation of the Manila clam (Ruditapes philippinarum) in ponds. No difference was observed in growth rates of molluscs, with food concentrations between 31 to 126 µg/l Chl a. However, the growth rates obtained from March to November with a food supplement were 1.5 times higher than those observed in the traditional, extensive cultivation. The biomass doubled and the increase in flesh dry weight was 2.5 times higher. The condition index reached a value of 100 in the intensive cultivation. During growth, the proximate composition analysis revealed that the lipid and carbohydrate...
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Skeletonema costatum; Elevage intensif; Claire; Croissance; Composition biochimique; Ruditapes philippinarum; Skeletonema costatum; Intensive rearing; Pond; Growth; Biochemical changes.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00039/14980/12307.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

Etude histoensymologique de la digestion chez Ruditapes philippinarum
Provedor de dados: 5
Autores: Hily, A.
Examinations of alimentary tract and digestive tubules after feeding give evidence of continuous digestive process in juveniles of Ruditapes philippinarum . Histoenzymologic study of digestive tract suggests important intracellular enzymatic activities in stomacal epithelium, digestive gland and intestinal cells. Main part of intracellular digestion occurred in digestive cells by lysosyme associated with vacuolar system.
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Bivalvia; Digestive system; Enzymatic activity; Histology; Digestive glands; Digestion; Enzymes digestives; Digestion; Bivalve.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1180.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

In situ fast marking study of manila clams (Ruditapes philippinarum)
Provedor de dados: 5
Autores: Mahe, Kelig; Bellamy, Elise; D'Amico, Franck; Caill-milly, Nathalie.
Arcachon Bay, in the southern Bay of Biscay, is the first French production area of Manila clam (Ruditapes philippinarum) with an annual commercial fisheries production around 400 tons in recent years. This bivalve mollusc was introduced into the bay in the 1980s for aquaculture purpose and quickly succeeded in natural settlement so that its high market value led to the progressive establishment of a perennial fishery from the mid-1990s. Local management plans applied to this species are based on a licensing system for the commercial, protected fishery areas and days of prohibited fishing for both commercial and recreational fishermen. A minimum catch size is also prescribed by European regulation, and so growth rates are an important matter in this...
Tipo: Text
Palavras-chave: Calcein; In-situ marking; Ruditapes philippinarum; Bivalve mollusks; Fisheries.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00665/77693/79770.pdf

Mise au point de l'élevage intensif de la palourde japonaise Ruditapes philippinarum en marais. Influence de la ration alimentaire, du taux de renouvellement de l'eau et de la vitesse de circulation en circuit semi-fermé
Provedor de dados: 5
Autores: Severin, Patricia; Baud, Jean-pierre; Haure, Joel.
Suite à une étude de faisabilité du grossissement intensif en marais de la palourde japonaise (Ruditapes philippinarum) effectuée en 1988 , une expérimentation ayant pour objectif d'optimiser les conditions d'élevage et de réduire les coûts a été réalisée durant la période de mars à novembre 1989 . L'influence de la ration alimentaire , du taux de renouvellement et de la vitesse de circulation de l ' eau de mer enrichie a été testée en circuit fermé. - Le mode de gestion de l ' eau de mer par recyclage partiel est à proscrire pour l ' élevage intensif de la palourde, il génère une hétérogénéité spatiale importante de la croissance sur toute la longueur des claires expérimentales. - Une influence prépondérante de la quantité de nourriture injectée est mise...
Tipo: Text
Palavras-chave: Aquaculture intensive; Marais maritime; Ruditapes philippinarum.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00048/15887/13309.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

Determination of diet in Manila clams by spatial analysis of stable isotopes
Provedor de dados: 5
Autores: 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

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

External pH modulation during the growth of Vibrio tapetis, the aetiological agent of brown ring disease
Provedor de dados: 5
Autores: Rahmani, Alexandra; Mathien, Clémentine; Bidault, Adeline; Le Goïc, Nelly; Paillard, Christine; Pichereau, Vianney.
Aims Brown Ring Disease (BRD) is an infection of the Manila clam Ruditapes philippinarum due to the pathogen Vibrio tapetis. During BRD, clams are facing immunodepression and shell biomineralization alteration. In this paper, we studied the role of pH on the growth of the pathogen and formulated hypothesis on the establishment of BRD by V. tapetis. Methods and Results In this study, we monitored the evolution of pH during the growth of V. tapetis in a range of pH and temperatures. We also measured the pH of Manila clam hemolymph and extrapallial fluids during infection by V. tapetis. We highlighted that V. tapetis modulates the external pH during its growth, to a value of 7.70. During the development of BRD, V. tapetis also influences extrapallial fluids...
Tipo: Text
Palavras-chave: BRD; Modulation effect; Neutralizing activity; PH; PH modifications; Ruditapes philippinarum; Vibrio tapetis.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00629/74142/73669.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

Empirical modelling of the growth of Ruditapes philippinarum by means of non linear regression on factorial coordinates
Provedor de dados: 5
Autores: Goulletquer, Philippe; Bacher, Cedric.
In order to highlight the main factors accounting for the growth of clams in Marennes Oleron Bay, three locations were investigated in 1984-1985. First, factor analysis provided information on fluctuations of the environment. Second, principal components analysis was used to study ecological phenomena. The main axes explained the growth rate, which was included in an allometric model. Its properties were then studied by means of sensitivity analysis.
Tipo: Text
Palavras-chave: Sensitivity analysis; Non linear model; Principal components analysis; Ruditapes philippinarum; Trophic relationships; Analyse de sensibilité; Modèle non linéaire; Analyse en composantes principales; Ruditapes philippinarum; Relations trophiques.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/publication-2879.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

Contribution à l'étude de la compatibilité des élevages de palourdes en association avec des crevettes impériales
Provedor de dados: 5
Autores: Ratiskol, Jacqueline; Faury, Nicole; Masson, Daniel.
La présente étude a été réalisée à la demande de la SEMDAC de Charente Maritime a fin de contribuer à la connaissance de ce phénomène dans le cas de l'élevage simultané de crevettes impériales (Penaeus japonicus) et de palourdes (Ruditapes philippinarum), Le suivi hydrologique et bactériologique des élevages a été réalisé dans des marais aménagés au voisinage de Marennes, en bordure de Seudre et alimentés en eau par des chenaux reconnus salubres.
Tipo: Text
Palavras-chave: Aquaculture; Elevage; Crevette; Penaeus japonicus; Palourde; Ruditapes philippinarum; Hydrologie; Bactériologie.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00119/23073/20914.pdf

Etude comparative de la qualité du milieu de bassins aquacoles de crevettes et palourdes chez des éleveurs du marais Breton (Vendée, Loire Atlantique)
Provedor de dados: 5
Autores: Gautier, Dominique.
Une étude du milieu de cinq bassins d'élevage a été menée du point de vue de la qualité de l'eau (température, salinité, oxygène dissous, pH, chlorophylle A, nutriments) et de la qualité du sédiment (matière organique, carbonate de calcium, épaisseur de vase organique, macrofaune dominante). La salinité, contrairement à la température, est fonction de la fréquence et du mode de renouvellement. Les variations nocturnes du pH de l'eau sont en relation avec celles de l'oxygène dissous qui sont elles-mêmes fonction de la concentration en chlorophylle a. La fluctuation du pH de la colonne d'eau differe selon les bassins. Elle peut être stable (autour de 8,1) ou très variable (entre 7,6 et 8,6), sans être toujours en relation avec la concentration en...
Tipo: Text
Palavras-chave: Aquaculture; Marais salés; Penaeus japonicus; Ruditapes philippinarum; Qualité du milieu; Sédiment.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00425/53644/54481.pdf

Spatio-temporal patterns of perkinsosis in the Manila clam Ruditapes philippinarum from Arcachon Bay (SW France)
Provedor de dados: 5
Autores: Dang, Cecile; De Montaudouin, Xavier; Caill-milly, Nathalie; Trumbic, Zeljka.
Pathogens belonging to the genus Perkinsus infect many bivalve molluscan species around the world, including the Manila clam Ruditapes phihppinarum. We investigated the spatial distribution of this parasite at 34 stations throughout Arcachon Bay (SW France). Prevalence of perkinsosis was 93% and mean infection abundance was 96 x 10(3) cells g(-1) wet gill. Lowest mean abundances were found close to the Leyre River mouth and a significant negative correlation was observed between mean abundance and salinity. Perkinsosis was rare at the oceanic site where salinities and other environmental parameters were stable. A second aim of this study was to survey perkinsosis during annual cycles at 4 sites within Arcachon Bay. Prevalence and intensities (+/-SE) of the...
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Perkinsus sp.; Arcachon Bay; Clam; Spatio-temporal variations; Disinfection; Infection.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00017/12812/9755.pdf

Facteurs contrôlant la croissance de Ruditapes philippinarum dans 4 nurseries de production en Charente-Maritime (France)
Provedor de dados: 5
Autores: Heral, Maurice; Deslous-paoli, Jean-marc; Garnier, Jacqueline; Prioul, Daniel; Heurtebise, Serge; Razet, Daniel.
Different types of pregrowth of the Japanese palourde are compared on the some site. The method by upwelling which is the more common used, to have good growth, requires a compromise between the running and the raised biomass.  Two periods are critical, in the summer the growth of mollusks is stopped because of a decrease in the phytoplanktonic production ;  in the winter, a fall in temperature lessens filtration and stops growth. The results concern clams consummatation rates of particular food (chlorophyll, protids, lipids, glucids) as weIl as the way to supply the decreasing growth : increase of phytoplankyonic production in the summer by recycling waters from nurseries that are loaded with ammoniac and raise winter temperatures by using under-ground...
Tipo: Text
Palavras-chave: Nursery; Growth; Ruditapes philippinarum; Clams; Nurserie; Croissance; Ruditapes philippinarum; Palourdes.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/acte-2951.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

Campagne d'évaluation du stock de palourdes du bassin d'Arcachon - Année 2006
Provedor de dados: 5
Autores: 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

Etude expérimentale de la prédation de la palourde japonaise, Ruditapes philippinarum, par la dorade royale, Sparus aurata, et le baliste, Balistes capriscus
Provedor de dados: 5
Autores: Robert, René; Parra, René.
Depuis 1988, d'importantes mortalités de palourdes japonaises Ruditapes philippinarum ont été enregistrées, sur de nombreux élevages, dans le bassin d'Arcachon. Pour expliquer celles-ci, l'hypothèse d'une prédation par la dorade royale Sparus aurata et par le baliste Balistes capriscus était avancée. Afin de la vérifier, une étude expérimentale de la prédation de la palourde par ces deux poissons a été réalisée en laboratoire. Si les relations taille prédateurs-taille proies sont plus marquées chez le baliste, les deux espèces sont particulièrement voraces, puisqu'elles s'avéraient capables de consommer, en 24 h, 500 petits naissains et 350 jeunes palourdes de 25 mm de longueur, 50 % à 70 % des proies étant consommés au cours des 6 premières heures....
Tipo: Text
Palavras-chave: Sparus aurata; Balistes capriscus; Ruditapes philippinarum; Palourde; Prédation; Comportement alimentaire; Sparus aurata; Balistes capriscus; Ruditapes philippinarum; Manila clam; Predation; Feeding behaviour.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00015/12601/9479.pdf

Diversification de la production conchylicole : cultures de palourdes sur estran (Compte rendu n°3)
Provedor de dados: 5
Autores: Goulletquer, Philippe.
Since 1984, experiments have been carried out on clam Ruditapes philippinarum foreshore culture, with a one year pond pre-growth. Culture conditions are now well-known: population level with a tide coefficient of around 70 to 80, sediment of silty or fine grain size, sediment stability over the culture period-between the end of April and November. This culture possibility gives way to a diversification of production in the shellfish culture basin of Marennes-Oléron and can be used as an alternative to oyster overexploitation. Clam densities (2 kg/m²) are five times lower than oyster and the Ruditapes philippinarum filtration rate is 20% lower than that of Crassostrea gigas.
Tipo: Text
Palavras-chave: Marennes Oléron; Culture en claire; Culture sur estran; Ruditapes philippinarum.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/rapport-3842.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

An infection of Ruditapes decussatus (Bivalvia) by Rickettsia
Provedor de dados: 5
Autores: Mialhe, Eric; Chagot, Dominique; Boulo, Viviane; Comps, Michel; Ruano, Francisco; Grizel, Henri.
The authors report the presence of a Rickettsia in Ruditapes decussatus from natural populations of the Algarve (Portugal). Light microscopic shows infections of varying importance in gill tissues. Some enclose small procaryotic colonies (cp) scattered in all lamellae; in others, the colonies are scarce and hypertrophic (100 mu m). These different pictures suggest an amplification process. Digestive diverticulae may also be infected, but to a lesser extent. The ultrastructural features of this intravacuolar (mvd: densified vacuolar membrane) procaryote (P) and its multiplication by scission without a complex developmental cycle allows its classification in the order Rickettsiales.
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Pathogens; Histopathology; Pathology.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-3107.pdf

Intensive culture of the Manila clam (Ruditapes philippinarum) in marine ponds. The impact of rearing densities and feeding levels on growth rates and yields
Provedor de dados: 5
Autores: Baud, Jean-pierre; Haure, Joel; Bodoy, Alain.
Intensive ongrowing (from 28 mm to the commercial size, 35 mm) of the Manila clam Ruditapes philippinarum was studied in experimental raceways with a natural bottom of clay. The factors controlled were rearing density (100, 200, and 300 individuals/m2) and food concentration (34.0 and 68.1 µg.1-1 chlorophyll a). Food was produced from a batch culture of Skeletonema costatum in a large volume (50 m3), thanks to the fertile ground and saline water. Best results regarding final size were obtained in the vicinity of the inflow with a densilY of 100 individuals/m2. However it was a density of 300 individuals/m2 which appeared from the following results to be the optimal choice for intensive rearing: the survival rate was 84 %, the final biomass was 4 kg/m2 and...
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Skeletonema costatum; Elevage intensif; Marais maritime; Croissance; Rendement; Ruditapes philippinarum; Skeletonema costatum; Intensive rearing; Marine pond; Growth rate; Yield.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00038/14950/12276.pdf

Stable isotopes changes in the adductor muscle of diseased bivalve Ruditapes philippinarum
Provedor de dados: 5
Autores: Dang, Cecile; De Montaudouin, X.; Savoye, N.; Caill-milly, Nathalie; Martinez, P.; Sauriau, Pierre-guy.
In this article, we show how a disease could bias stable isotope analyzes of trophic networks and propose a strategy in the choice of tissues to be analyzed. In the past few years, a new pathology (brown muscle disease or BMD) affecting the posterior adductor muscle of Ruditapes philippinarum has emerged in Arcachon Bay. BMD induces a necrosis of muscle tissues which become infused by conchiolin and hence calcified. As muscle of mollusks are often used for trophic food webs studies through stable isotopic analyzes, this work investigated the effect of BMD on carbon and nitrogen isotopic ratios of anterior and posterior adductor muscles of clams collected in February and August 2007. Infected clams displayed a lower condition index and a posterior adductor...
Tipo: Text
Palavras-chave: Calcification; Disease; Adductor muscle; Stable isotopes; Ruditapes philippinarum; Clam.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/2009/publication-6270.pdf

Modélisation de la croissance de Ruditapes philippinarum dans un système expérimental
Provedor de dados: 5
Autores: Bensch, Alexis; Bacher, Cedric; Baud, Jean-pierre; Martin, Jean-louis.
The growth of Ruditapes philippinarum was modeled with an energetic budget equation. Clams were fed with Skeletonema costatum in experimental units during 6 months. The filtration and respiration terms of the budget were depending on the temperature and the dry weight. The spawning effort was represented by an allometric relation derived from the experimental data. The model simulated the individual growth of the dry weight and of the shell converted into energy during the 6 months of the experiment. The results fitted well with the observations until the loss of energy due to the spawning. After that period the model overestimated the growth which was explained by another spawning loss not taken into account in the model and not noticeable with the...
Tipo: Text
Palavras-chave: Intensive rearing; Spawning; Sensitivity analysis; Ruditapes philippinarum; Energetic modeling; Elevage intensif; Ponte; Analyse de sensibilité; Ruditapes philippinarum; Modéle énergétique.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-3062.pdf

Experimental shift of diet and DIC stable carbon isotopes: Influence on shell delta C-13 values in the Manila clam Ruditapes philippinarum
Provedor de dados: 5
Autores: Poulain, C.; Lorrain, Anne; Mas, R.; Gillikin, D. P.; Dehairs, F.; Robert, Rene; Paulet, Yves-marie.
The influences of diet and seawater dissolved inorganic carbon (DIC) on the carbon isotope composition of shell aragonite (Cinched in the Manila clam Ruditapes philippinarum reared under laboratory conditions were investigated. Clams were exposed to two successive negative carbon isotope shifts: a first shift in diet (delta C-13(phytoplankton)) and a second shift, 35 days later, in DIC (delta C-13(DIC)). Both successive shifts induced a decrease in delta C-13(shell). These results are the first to experimentally confirm an incorporation of respired carbon derived from food and carbon from DIC into shell carbonate of adult bivalves. Skeletal delta C-13 responded to changes in the delta C-13 of both diet and DIC in less than 7 days. Consequently, proxies...
Tipo: Text
Palavras-chave: Delta C-13(shell); DIC; Salinity; Metabolic carbon; Ruditapes philippinarum; Estuarine water; Proxy.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00003/11443/8001.pdf

Dynamique des populations de palourdes japonaises (Ruditapes philippinarum) dans le bassin d'Arcachon : conséquences sur la gestion des populations exploitées
Provedor de dados: 5
Autores: Dang, Cecile.
The Manila clam Ruditapes philippinarum was introduced into Arcachon Bay at the beginning of the 1980s for aquaculture purposes. It rapidly naturalized in all intertidal flats of the lagoon. Nowadays, Arcachon Bay ranks at the first French place in terms of exploitable stock. However, recent stock assessments have shown an unbalance size structure with a deficit in juvenile and adult clams (&gt; 38 mm shell length). These alarming patterns asked many questions on the sustainability of Manila clam populations within Arcachon Bay and have motivated the present thesis. This study aimed to better understand the population dynamics of this species and also some factors controlling this dynamic. The final objective was to improve the Manila clam fishing...
Tipo: Text
Palavras-chave: Management; Trophic sources; Pathogens; Population dynamics; Ruditapes philippinarum; Gestion; Resources trophiques; Pathogènes; Dynamique de population; Ruditapes philippinarum.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/these-7382.pdf

Mortalité hivernale chez la palourde japonaise Ruditapes philippinarum sur le littoral atlantique : aspects biochimique et écophysiologique
Provedor de dados: 5
Autores: Goulletquer, Philippe.
For some years, high mortalities on Manila clam's bredding occured at the end of winter on Atlantic coasts. The ecophysiological survey of population was performed using a ground culture technique. This permitted to characterize the conditions related with mortalities such as a loss in dry weight and a decrease of metabolic reserves. A comparison of biochemical composition was conducted during the occurence of mortality on different sites along the Atlantic coast, and in different ecosystems (tidal land, oysters ponds).
Tipo: Text
Palavras-chave: Tidal bottom; Oyster pond; Glycogen; Ruditapes philippinarum; Mortality; Estran; Claires ostréicoles; Glycogène; Ruditapes philippinarum; Mortalité.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/publication-3019.pdf

Etudes pathologiques et epidemiologiques des lesions parasitaires chez Ostrea edulis : Premiers resultats d'un recherche prospective comparative chez les principales especes de mollusques des zones ostreicoles de Bretagne nord
Provedor de dados: 5
Autores: Poder, M; Auffret, Mathieu; Balouet, G.
This paper is a contribution to the study of the Bonamia ostreae epizooty in french european oyster Ostrea edulis : parasite process (hemocytic parasitosis); experimental contaminations on parks and in tanks. First results of an epidemiological watch conducted in oyster culture sites show in molluks mytilidae, pectinidae, cardiidae, veneridae: the absence of Bonamia ostreae forms; the existence of different types of parasitism or commensalisus of inequal pathological importance and especially a parasite of the Marteilia genus in Tapes sp . digestive epithelium. Additionally, a new example of hemocytosercoma is observed in Cerastoderma edule .
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Tapes rhomboides; Tapes pullastra; Mytilus edulis; Cerastoderma edule; Ostrea edulis; Bivalvia; Marteilia; Bonamia ostreae; Comparative studies; Parasitic diseases; Commensalism; Parasitology; Marine mollusks; Epidemiology; Pathology; Pathologie; Mollusques; Bonamia ostreae; Epizootie; Ostrea edulis.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1182.pdf

Polyploidy in the Manila clam Ruditapes philippinarum. II. Chemical induction of tetraploid embryos
Provedor de dados: 5
Autores: Diter, Alain; Dufy, Christian.
Tetraploidy was induced in embryos of Ruditapes philippinarum by treating the eggs with cytochalasin B. (CB). Two treatment times were found to be effective in inducing tetraplidy : 0 to 10 minutes after insemination (before formation of the first polar body) and 45 minutes after insemination (just before the first cleavage). Treatments, started 5 and 45 minutes after insemination, produced 64.4 ± 7.8% and 28.3 ± 2.3% tetraploid embrios, respectively, after 6 hours (on the average over 3 experiments). However, no tetraploids were detected in 4-month-old spat. Sperm entry delayed by the CB could be involved in induction of tetraploidy by early treatment.
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Bivalve; Tetraploidy; Cytochalasin B.; Ruditapes philippinarum; Bivalve; Tétraploïdie; Cytochalasine B.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/publication-2753.pdf

Utilisation d'eaux salées souterraines en baie de Bourgneuf, pour le prégrossissement intensif de mollusques filtreurs en nourricerie
Provedor de dados: 5
Autores: Baud, Jean-pierre.
L'utilisation d'une eau salée souterraine riche en sels nutritifs et de température constante a permis d'étudier l'influence des paramètres physicochimiques essentiels sur la croissance intensive de naissains de Crassostrea gigas et de Ruditapes philippinarum en nourricerie durant les périodes hivernales et estivales. Après la mise au point d'un procédé fiable de culture d'une algue fourrage, la variabilité saisonnière des composés biochimiques de la diatomée Skeletonema costatum produite en grands volumes extérieurs (50 m3) est étudiée. Les conditions d'élevage lors des différentes expériences sont contrôlées (densité de naissain, débit d'eau de mer, concentration de phytoplancton et température). Les différents résultats biologiques obtenus sont analysés...
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Crassostrea gigas; Prégrossissement intensif; Nourricerie; Eau salée souterraine; Baie de Bourgneuf; Relations trophiques.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00441/55217/56691.pdf

Mortalité hivernale chez la palourde japonaise Ruditapes philippinarum sur le littoral atlantique : aspects biochimique et écophysiologique
Provedor de dados: 5
Autores: Goulletquer, Philippe.
For some years, high mortalities on Manlia clam's breeding occured at the end of winter on Atlantic coasts. The ecophysiological survey of population was performed using a ground culture technique. This permitted to characterize the conditions related with mortalities such as a loss in dry weight and a decrease of metabolic reserves. A comparison of biochemical composition was conducted during the occurence of mortality on different sites along the Atlantic coast, and in different ecosystems (tidal land, oysters ponds).
Tipo: Text
Palavras-chave: Mortalité; Ruditapes philippinarum; Glycogène; Claires ostréicoles; Estran; Mortality; Ruditapes philippinarum; Gycogen; Oyster pond; Tidal bottom.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00134/24517/22546.pdf

Virus-like particles associated with brown muscle disease in Manila clam, Ruditapes philippinarum, in Arcachon Bay (France)
Provedor de dados: 5
Autores: 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

An evaluation of Mg/Ca, Sr/Ca, and Ba/Ca ratios as environmental proxies in aragonite bivalve shells
Provedor de dados: 5
Autores: Poulain, C.; Gillikin, D. P.; Thebault, Julien; Munaron, Jean-marie; Bohn, M; Robert, Rene; Paulet, Yves-marie; Lorrain, Anne.
The influence of salinity and water chemistry on Mg/Ca, Sr/Ca and Ba/Ca ratios in the aragonitic shells of the Manila clam were investigated. Clams were reared at constant temperature (20 °C) under different controlled conditions of salinity, commonly encountered in their natural habitat. Clams were held in three tanks with a constant salinity of 35 for the first 35 days and then two tanks were changed to lower salinities (20 and 28) for the next 29 days. Individual shell Mg/Ca, Sr/Ca and Ba/Ca ratios were studied through time. Despite stable conditions (temperature, salinity, and Mg/Cawater) for clams reared at salinity 35 during the experiment, Mg/Ca shell ratios increased through the time. Moreover the salinity decrease at t35 slowed the increase of...
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Aragonite; Sclerochronology; Bivalved mollusk; Trace element; Proxy.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00245/35649/34158.pdf

Reproduction uniparentale et polyploidie induites chez la truite arc-en-ciel (Oncorhynchus mykiss) et chez les bivalves Crassostrea gigas, Ruditapes philippinarum et Chlamys varia
Provedor de dados: 5
Autores: Diter, Alain.
Methods of gynogenesis, androgenesis and polyploidy induction were developed with the aim of genetic improvement in the rainbow trout, the Pacific oyster, the Manila clam and the black scallop. In the trout: · haploid androgenesis was induced by means of a pressure shock applied on diploid eggs, probably at the time of karyogamy. Diploid androgenetic individuals were directly produced from eggs fertilized with sperm from tetraploid male. · a heat shock treatment effective for suppressing the first egg mitosis was developed. This treatment allows the production of homozygous gynogenetic lines (checked using enzyme electrophoresis technique) from eggs inseminated with ultraviolet irradiated sperm. The treatment also induced tetraploidy in eggs normally...
Tipo: Text
Palavras-chave: Méthode induction gynogenèse; Androgenèse; Polyploïdie; Oncorhynchus mykiss; Crassostrea gigas; Ruditapes philippinarum; Chlamys varis; Génétique; Methods of gynogenesis; Androgenesis; Polyploidy; Oncorhynchus mykiss; Crassostrea gigas; Ruditapes philippinarum; Chlamys varis; Genetic.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00210/32097/30553.pdf

Perspectives de développement de l'élevage de la palourde japonaise Ruditapes philippinarum dans le bassin ostréicole de Marennes-Oléron
Provedor de dados: 5
Autores: Goulletquer, Philippe; Nedhif, Mohamed; Heral, Maurice.
The complete Manila clam's breeding cycle (Ruditapes philippinarum ) in oysters ponds (claires) permits  to obtain a length of 25 mm after 1 year with a density range of 200 animals/m2 . As the primary production is restricted, the breeding biomass during the second year is limited to 500 g.m2 corresponding to a density between 30 to 50 clams..m-2. For an increase of the production it is necessary to extend the cultivated area to the tida1 bottom of the Bay of Marennes-Oleron. It appears that the man tidal level between + 2 and + 2.5 15 necessary with a density range of 200.m-2 to reach, the market size nine months later. The harvest sould be done before winter time to avoid a large 1055 of the flesh which can cause high levels of mortality.
Tipo: Text
Palavras-chave: Marennes Oleron; Breeding; Clams; Ruditapes philippinarum; Marennes Oléron; Elevage; Palourdes; Ruditapes philippinarum.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-2966.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

Stratégie de prégrossissement intensif de naissains de palourdes (R. philippinarum) et d'huîtres (C. gigas) en baie de Bourgneuf
Provedor de dados: 5
Autores: 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

Recherches actuelles en pathologie des mollusques
Provedor de dados: 5
Autores: Mialhe, Eric.
The different epizooties affecting traditional or recent shellfish culture activities (hatcheries, cockle culture) brought to light some microorganisms and parasites considered as the responsible pathogenic agents. However, in a number of cases, the etiology of these massive mortalities remains unexplained (Grassostrea gigas, Ruditapes philippinarum). Some additional works, based on some electron microscopy techniques and isolation methods, are thus essential in order to precise the infectious nature of these diseases.
Tipo: Text
Palavras-chave: Immunodiagnostics; Purification; Agent pathogène; Mya arenia; Ruditapes philippinarum; Crassostrea gigas; Mollusques; Pathologie.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-6204.pdf

The Manila clam population in Arcachon Bay (SW France): Can it be kept sustainable?
Provedor de dados: 5
Autores: Dang, Cecile; De Montaudouin, Xavier; Gam, Meriame; Paroissin, Christian; Bru, Noelle; Caill-milly, Nathalie.
The venerid clam Ruditapes philippinarum is the most prominent suspension-feeding bivalve inhabiting muddy intertidal seagrass beds in Arcachon Bay (SW France). It is exploited by fishermen, and Arcachon Bay ranks number one in France in terms of production and total biomass of this species. Previous studies revealed a decrease in the standing stock of R. philippinarum since 2003 and unbalanced length-frequency distributions with a lack of juveniles and of adults &gt;40 mm. Consequently, the population dynamics of this bivalve were studied at four intertidal sites and one oceanic site in Arcachon Bay. As clam size structure did not allow classical dynamics computations. field monitoring was coupled with field experiments (tagging-recapture) over two years....
Tipo: Text
Palavras-chave: Manila Clam; Ruditapes philippinarum; Growth; Mortality; Reproduction; Population Dynamic; Production; Productivity.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11292/7990.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

Development of a generic decision-support tool for identifying potentially invasive aquatic taxa: AS-ISK
Provedor de dados: 5
Autores: 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

Impact of Brown Ring Disease on the energy budget of the Manila clam Ruditapes philippinarum
Provedor de dados: 5
Autores: Flye Sainte Marie, Jonathan; Pouvreau, Stephane; Paillard, Christine; Jean, Fred.
Brown Ring Disease (BRD) is a bacterial disease caused by the pathogen, Vibrio tapetis. The disease induces formation of a brown deposit on inner shell of the Manila clam, Ruditapes philippinarum. Development of this disease is correlated with a decrease in the condition index of infected clams. Experiments were conduced in order to assess the effect of the development of BRD on two parameters affecting the energy balance of the clams: the clearance and the respiration rates. Experiments were performed in a physiological measurement system that allowed simultaneous measures of clearance and respiration rates. During both acclimation and measurements clams were fed with cultured T-iso and temperature was close to seasonal field temperature (10 degrees C....
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Respiration rate; Filtration; Energy budget; Clearance rate; Brown Ring Disease.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3013.pdf

Implication of the Type IV Secretion System in the Pathogenicity of Vibrio tapetis, the Etiological Agent of Brown Ring Disease Affecting the Manila Clam Ruditapes philippinarum
Provedor de dados: 5
Autores: Rahmani, Alexandra; Delavat, François; Lambert, Christophe; Le Goic, Nelly; Dabas, Eric; Paillard, Christine; Pichereau, Vianney.
Vibrio tapetis is a Gram-negative bacterium that causes infections of mollusk bivalves and fish. The Brown Ring Disease (BRD) is an infection caused by V. tapetis that primarily affects the Manila clam Ruditapes philippinarum. Recent studies have shown that a type IV secretion system (T4SS) gene cluster is exclusively found in strains of V. tapetis pathogenic to clams. However, whether the T4SS is implicated or not during the infection process remains unknown. The aim of this study was to create and characterize a V. tapetis T4SS null mutant, obtained by a near-complete deletion of the virB4 gene, in order to determine the role of T4SS in the development of BRD. This study demonstrated that the T4SS is neither responsible for the loss of hemocyte adhesion...
Tipo: Text
Palavras-chave: Brown Ring Disease; Vibrio tapetis; Ruditapes philippinarum; Hemocytes; Type four secretion system; Rounding phenotype; Colonization; Mutagenesis.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00692/80383/83507.pdf

Optimisation de l'élevage intensif de la palourde japonaise Ruditapes philippinarum en marais
Provedor de dados: 5
Autores: 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

Croissance et reproduction de Ruditapes philippinarum (Adams &amp; Reeve 1850) en fonction des conditions d'élevage (milieu lagunaire et claire)
Provedor de dados: 5
Autores: Goulletquer, Philippe.
For a few years, we have witnessed the rapid development of Japanese clam Ruditapes philippinarum (Adams &amp; Reeve) culture on the Atlantic coast, and especially in the Charente Maritime region. However, a number of unknown variables still exist in order to optimize oyster farms and improve their benefits. In this respect, studies have been carried out since 1975 by the Centre Océanologique de Bretagne in Tudy Island, in the Kermoor pond, in order to determine: the consequence of the immersion size on their growth, the optimal seeding period, and the survival rate. Moreover, other studies aimed to significantly reduce the production cost, focused on pre-growth length. These studies correspond to a specific environment (i.e. the semi-closed Kermoor pond)....
Tipo: Text
Palavras-chave: Maturation sexuelle; Cycle gamétogénétique; Biométrie; Croissance; Ruditapes philippinarum; Palourdes.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/rapport-3843.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

Influence du temps d'immersion sur l'activité reproductrice et sur la croissance de la palourde japonaise Ruditapes philippinarum et l'huître japonaise Crassostrea gigas
Provedor de dados: 5
Autores: Goulletquer, Philippe; Lombas, Ines; Prou, Jean.
Pour étudier l'influence du temps d'immersion sur deux espèces cultivées, la palourde japonaise Ruditapes philippinarum et l'huître japonaise Crassostrea gigas, un suivi saisonnier de croissance est réalisé à 3 niveaux d'émersion (12%, 29% et 46%) sur l'estran du bassin de Marennes-Oléron. Des différences interspécifiques apparaissent : une prise de poids de coquille hivernale chez Crassostrea gigas, un arrêt étant observé en période automnale pour Ruditapes philippinarum. Par ailleurs l'émission des gamètes est plus précoce (août) et proportionnellement plus importante pour Crassostrea gigas que pour Ruditapes philippinarum (septembre). Les performances de croissance, la prise de poids ainsi que la distribution des populations des deux espèces sont...
Tipo: Text
Palavras-chave: Effort de reproduction; Temps d'immersion; Ruditapes philippinarum; Crassostrea gigas; Reproductive effort; Immersion time; Ruditapes phi Lippinarum; Crassostrea gigas.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/00112/22374/20054.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

Reduction of adhesion properties of Ruditapes philippinarum hemocytes exposed to Vibrio tapetis
Provedor de dados: 5
Autores: 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

Asari clam (Ruditapes philippinarum) in France: history of an exotic species 1972 – 2015
Provedor de dados: 5
Autores: De Montaudouin, Xavier; Arzul, Isabelle; Caill-milly, Nathalie; Khayati, Alice; Labrousse, Jean-michel; Lafitte, Céline; Paillard, Christine; Soudant, Philippe; Goulletquer, Philippe.
In 1972, France underwent an oyster (Crassostrea angulata) crisis and urgently needed to diversify its aquaculture. Thus, Asari clam (Ruditapes philippinarum) was introduced at that time for aquaculture purpose, concomitantly with the introduction of Pacific oyster (Crassostrea gigas). All Asari clam adults and spat originated from the same area (Puget Sound, WA, USA). After a promising start and the implementation of a national Research &amp; Development program, Asari clam culture rapidly faced a series of concomitant handicaps: firstly, in spite the fact that cultural practices were optimized and locking points addressed, leasing ground availability was limited during the 1980s’ due to certain reluctance from oyster farmers to share their leases and/or...
Tipo: Text
Palavras-chave: Ruditapes philippinarum; France; Aquaculture; Professional fishing; Diseases; Environmental stressors.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00366/47767/47817.pdf

Development of culture techniques for new bivalve species
Provedor de dados: 5
Autores: Bodoy, Alain; Mercer, J. P.
Were are two main reasons for the development of cultivation techniques of new  bivalve species. First, the risk exists that traditionally reared species may be ereadicated or severely depleted by pathogenic agents. For example the Portuguese 0yster  Crassostrea angulata. disapeared from the French coasts in the early 1970's and worldwide production of the flat oyster, Oslrea edulis has been dramatically reduced by the effects of Bonamia.  Secondly, in some countries production may he self-Iimiting by the size and availabilily of national and international markets and a wider species range could offer some promising new economic opportunities for aquaculturists. In particular this applies to species where there are identifiable market shortfalls.
Tipo: Text
Palavras-chave: Haliotis tuberculata; Ostrea edulis; Placopecten magellanicus; Scallops; Ruditapes philippinarum; Manila clam; Molluscs; Cultivation techniques.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/publication-3033.pdf

Digestibilité de l'algue Skeletonema costatum par la palourde japonaise Ruditapes philippinarum : éléments d'optimisation appliqués à la vénériculture intensive en marais
Provedor de dados: 5
Autores: Sauriau, Pierre-guy; IFREMER - Laboratoire Ecosystèmes Conchylicoles (LEC) La Tremblade; ECOCEAN - Environnement Littoral &amp; Marin La Rochelle.
Le présent rapport se scinde en trois volets. le premier expose la genèse de l'application à l'aquaculture intensive d'une technique employée en agriculture intensive. Le second volet s'attache à comparer les résultats des calculs de taux de digestibilité acquis, d'une part, in vitro sous des conditions de débit circulant et de type nourriture variables et, d'autre part, in situ par prélèvement des palourdes directement dans le système d'élevage. Enfin le dernier volet contient l'analyse des la distribution spatiales des colonies algales de Skeletonema costatum dans une claire ostréicole expérimentale.
Tipo: Text
Palavras-chave: Vénériculture; Marais; Algue; Skeletonema costatum; Digestion; Ruditapes philippinarum; Bivalvia.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00144/25476/23629.pdf

Vibrio tapetis, the Causative Agent of Brown Ring Disease, Forms Biofilms with Spherical Components
Provedor de dados: 5
Autores: Rodrigues, Sophie; Paillard, Christine; Le Pennec, Gael; Dufour, Alain; Bazire, Alexis.
Vibrio tapetis is a marine bacterium causing Brown Ring Disease (BRD) in the Manila clam Ruditapes philippinarum. V. tapetis biofilm formation remains unexplored depite the fact that it might be linked to pathogenicity. Our objectives were to characterize the in vitro biofilm formation of V tapetis and evaluate the effects of culture conditions. Biofilm structure and its matrix composition were examined by confocal laser scanning microscopy and scanning electron microscopy. V tapetis was able to form biofilms on a glass substratum within 24 h. Polysaccharides and extracellular DNA of the biofilm matrixes were differently distributed depending on the V tapetis strains. Spherical components of about 1-2 mu m diameter were found at the biofilm surface. They...
Tipo: Text
Palavras-chave: Vibrio tapetis; Biofilm; Brown Ring Disease; Ruditapes philippinarum; Spherical components; Temperature effect; Salinity effect.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00307/41783/42796.pdf

A herpes-like virus infects a non-ostreid bivalve species: virus replication in Ruditapes philippinarum larvae
Provedor de dados: 5
Autores: Renault, Tristan; Lipart, Cecile; Arzul, Isabelle.
Sporadic high mortalities were reported in June 1997 among hatchery-reared larval Manila clam Ruditapes philippinarum in a French commercial hatchery. Cellular abnormalities were observed in semi-thin sections in affected animals. Transmission electron microscopy revealed the presence of herpes-like virus particles in larvae. This is the first description of a herpes-like virus infection in larval R. philippinarum, a non-ostreid bivalve species. Virus particles were similar to other herpes-like viruses described from different oyster species with respect to ultrastructure and morphogenesis. Electron microscopic examination also demonstrated cells with condensed chromatin and extensive perinuclear fragmentation of chromatin. Like viruses infecting oysters,...
Tipo: Text
Palavras-chave: Apoptosis; Virus replication; Mortality; Ruditapes philippinarum; Manila clam; Herpes like virus.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-816.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

Élevage de la palourde japonaise Ruditapes philippinarum dans le bassin d'Arcachon. Bilan des dix dernières années et  perspectives de développement
Provedor de dados: 5
Autores: Robert, Rene; Deltreil, Jean-pierre.
Farming of the Japanese clam Ruditapes philippinarum took place for the first time in 1980 in the Arcachon basin. After an experimentation period of about ten years, a farming strategy, taking into consideration the distinctive features found in the bay, was able to emerge. For example, in order to fight against clam predators, crabs such as Carcinus maenas, and balistes such as Balistes capriscus, vertical protection coupled with prior ground gravelling, and laying of nets over the beds during the summer months, have become necessary. The best raising technique seems to rest on early spring planting of middle size spats (T5), after checking that no brown rings are visible. If clam growth seems to be better in oceanic zones, it looks similar in other areas...
Tipo: Text
Palavras-chave: Basin of Arcachon; Culture methods; Growth; Predation; Balistes capriscus; Carcinus maenas; Ruditapes philippinarum; Bassin d'Arcachon; Stratégie d'élevage; Croissance; Prédation; Balistes capriscus; Carcinus maenas; Ruditapes philippinarum.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/rapport-1652.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

Action des facteurs hydrologiques et sédimentaires sur le budget énergétique de la palourde japonaise Ruditapes philippiarum élevée dans un écosystème estuarien (Bassin de Marennes-Oléron, France)
Provedor de dados: 5
Autores: Daou, Rafik.
Afin d'étudier l'action du sédiment sur les populations de Ruditapes philippinarum, 12 000 individus ont été répartis en 1986 sur 3 substrats dans le bassin de Marennes-Oléron. Tous les paramètres du milieu sont analysés sur les 3 sites pendant un cycle annuel parallèlement aux suivis biométriques, biochimiques et énergétiques sur les animaux. Ainsi dans ce secteur d'élevage "Les Doux" où l'influence estuarienne (Charente) est faible, les phénomènes circadiens, régissant la dynamique sédimentaire, n'affectent pas la distribution du matériel dissous. L'étude des différents fractions sestoniques au dessus de chaque parc montre qu'ils sont recouverts par la m^me masse d'eau.  Par ailleurs, les effets négatifs des sédiments à fortes teneurs pélitiques sur les...
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Sédimentologie; Budget énergétique; Bassin de Marennes Oléron; France.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00285/39596/38088.pdf

Why is Asari (= Manila) clam Ruditapes philippinarum fitness poor in Arcachon Bay: a meta-analysis to answer?
Provedor de dados: 5
Autores: De Montaudouin, X.; Lucia, M.; Binias, C.; Lassudrie, Malwenn; Baudrimont, M.; Legeay, A.; Raymond, N.; Jude-lemeilleur, F.; Lambert, C.; Le Goic, N.; Garabetian, F.; Gonzalez, P.; Hegaret, Helene; Lassus, Patrick; Mehdioub, W.; Bourasseau, L.; Daffe, G.; Paul-pont, I.; Plus, Martin; Do, V. T.; Meisterhans, G.; Mesmer-dudons, N.; Caill-milly, Nathalie; Sanchez, Florence; Soudant, P.
Asari (= Manila) clam, Ruditapes philippinarum, is the second bivalve mollusc in terms of production in the world and, in many coastal areas, can beget important socio-economic issues. In Europe, this species was introduced after 1973. In Arcachon Bay, after a decade of aquaculture attempt, Asari clam rapidly constituted neo-naturalized population which is now fished. However, recent studies emphasized the decline of population and individual performances. In the framework of a national project (REPAMEP), some elements of fitness, stressors and responses in Arcachon bay were measured and compared to international data (41 publications, 9 countries). The condition index (CI=flesh weight/shell weight) was the lowest among all compared sites. Variation in...
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Condition index; Perkinsus; Brown Muscle Disease; Element contamination; Immune system; Arcachon Bay.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00280/39123/37676.pdf

Etude des facteurs environnementaux intervenant sur la production de la palourde japonaise d'élevage Ruditapes philippinarum
Provedor de dados: 5
Autores: Goulletquer, Philippe.
Les populations d'élevage de Ruditapes philippinarum présentent des disparités de croissance et de mortalité en fonction des secteurs océaniques ou estuariens à Marennes-Oléron. Les mortalités hivernales sont associées à des productions somatiques négatives, en particulier en zone estuarienne, où les teneurs en seston minéral sont élevées (70 mg.1-1). L'étude écophysiologique montre une baisse de la digestibilité de la nourriture parallèlement à l'augmentation de sa teneur minérale. Les productions négatives résultent d'une nourriture assimilée en quantité inférieure au seuil de rendement nul de croissance (2.J.h- 1). Les productions somatiques et gamétiques de l'animal sont déterminées par le temps d'émersion. Une diminution de celui-ci induit une...
Tipo: Text
Palavras-chave: Estimation nourriture; Capacité trophique; Estimation production; Mortalité; Ecophysiologie; Relation trophique; Bivalvia; Ruditapes philippinarum; Facteurs environnementaux.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00098/20926/18535.pdf

Brown muscle disease (BMD), an emergent pathology affecting Manila clam Ruditapes philippinarum in Arcachon Bay (SW France)
Provedor de dados: 5
Autores: 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

Prégrossissement et élevage de palourdes japonaise en marais : technique entre filet
Provedor de dados: 5
Autores: Zanette, Yvan; Heral, Maurice; Peyre, Roger.
Another breeding technique was worked out for Japanese clam Ruditapes philippinarum. It consists in breeding it in a large two-fold net dipped into mud.
Tipo: Text
Palavras-chave: Technique; Elevage; Ruditapes philippinarum.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/acte-2942.pdf

Effect du Vibrio P1, pathogene de Ruditapes philippinarum , sur d'autres especes de bivalves
Provedor de dados: 5
Autores: Maes, P; Paillard, C.
The symptom which characterizes the brown ring disease (BRD) in Manilla clam Ruditapes philippinarum has been observed in other Bivalvia species (Veneridae and Pectinidae). Vibrio P1, responsible of the BRD in R. philippinarum , has been detected in other Veneridae which were carrying the symptom. In mussel and oysters which are cultivated in Europe, the symptom has never been reported and Vibrio P1 has not been detected. Experimental contaminations of bivalves of commercial interest with the pathogen showed a clear Vibrio P1 sensitivity of European clam R. decussatus ; this latter seems however to be less sensitive than the Manilla clam.
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Bivalvia; Diseases; Marine molluscs; Pathology; Vibriosis.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-926.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

Diversification de la production : culture de palourdes sur estran, résultats années 84-85
Provedor de dados: 5
Autores: Goulletquer, Philippe; Prou, Jean; Heral, Maurice.
Following the development of net protection techniques (1980), Japanese clam Ruditapes philippinarum farms develop in the ponds of Charente-Maritime. The county production for 1984 is about 100 tonnes, for a turnover of 4.5 Million Francs. To this day, farmers cultivating clams in ponds over a full cycle get better growth results during the first year. The size of 24 mm is obtained with a density of 200 individuals per square metre. However, due to the type of water input in ponds and to the limited primary production developing in the latter, it appears that biomasses in farms during the second year should not be greater than 0.5 to 1 kg per m² (30 to 50 clams per m²). Thus, the development of clam culture in marsh areas comes to a halt, as farmers are...
Tipo: Text
Palavras-chave: Marennes Oléron; Mortalité; Biomasse; Croissance pondérale; Croissance linéaire; Biométrie; Elevage; Ruditapes philippinarum; Palourdes.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/rapport-3840.PDF

Metabolic responses of clam Ruditapes philippinarum exposed to its pathogen Vibrio tapetis in relation to diet
Provedor de dados: 5
Autores: Richard, Gaelle; Guerard, Fabienne; Corporeau, Charlotte; Lambert, Christophe; Paillard, Christine; Pernet, Fabrice.
We investigated the effect of brown ring disease (BRD)1 development and algal diet on energy reserves and activity of enzymes related to energy metabolism, antioxidant system and immunity in Manila clam, Ruditapes philippinarum. We found that algal diet did not impact the metabolic response of clams exposed to Vibrio tapetis. At two days post-injection (dpi), activities of superoxide dismutase and glutathione peroxidase (GPx) decreased whereas activities of nitric oxide synthase (iNOS) and catalase increased in infected clams, although no clinical signs were visible (BRD-). At 7 dpi, activities of several antioxidant and immune-related enzymes were markedly increased in BRD-likely indicating an efficient reactive oxygen species (ROS) scavenging compared to...
Tipo: Text
Palavras-chave: Antioxidant enzymes; Immunity; Energetic metabolism; Ruditapes philippinarum; Vibrio tapetis.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00316/42684/42057.pdf

Effets de la turbidité sur les palourdes adultes Ruditapes philippinarum (Adams &amp; Reeve) : croissance, mortalité, effort de reproduction, composition biochimique
Provedor de dados: 5
Autores: Daou, Rafik; Goulletquer, Philippe.
Following observations on disparity in the growth of the Manila clam bred in the field, laboratory experiments were conducted to test the turbidity. This factor influenced the growth and mortality of Manila clam. The reproductive effort, growth and mortality of two populations were followed, one being cultivated in water with high levels on silt. A biochemical survey permitted the response to the effect of mineral particles to be estimated
Tipo: Text
Palavras-chave: Mortality; Reproductive effort; Biochemical changes; Ruditapes philippinarum; Turbidity; Mortalité; Effort de reproduction; Composition biochimique; Ruditapes philippinarum; Turbidité.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/publication-2876.pdf

Effect of a mono-specific algal diet on immune functions in two bivalve species - Crassostrea gigas and Ruditapes philippinarum
Provedor de dados: 5
Autores: Delaporte, Maryse; Soudant, Philippe; Moal, Jeanne; Lambert, Christophe; Quere, Claudie; Miner, Philippe; Choquet, Gwenaelle; Paillard, Christine; Samain, Jean-francois.
The impact of diets upon the fatty acid composition of haemocyte polar lipids and consequently upon immune parameters has been tested in the oyster Crassostrea gigas and the clam Ruditapes philippinarum. Oysters and clams were fed each of three cultured algae: Chaetoceros calcitrans, which is rich in 20:5(n-3) and 20:4(n-6) and poor in 22:6(n-3) fatty acids; T-Iso (Isochrysis sp.), which is rich in 22:6(n-3) and deficient in 20:5(n-3) and 20:4(n-6); and Tetraselmis suecica, which is deficient in 22:6(n-3) and contains only small amounts of 20:5(n-3) and 20:4(n-6). Fatty acid composition of haemocyte polar lipids was greatly affected by the diet. Oysters and clams fed C. calcitrans maintained a higher proportion of 20:5(n-3) and 20:4(n-6) in their haemocyte...
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Crassostrea gigas; Polyunsaturated fatty acids; Phagocytosis; Oxidative activity; Haemocyte membrane; Nutrition; Immunology; Bivalve; Immunologie; Bivalve; Ruditapes philippinarum; Crassostrea gigas; Acides gras poly insatures; Phagocytose; Flambee respiratoire; Membrane; Hemocyte; Nutrition.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-354.pdf

Elevage intensif de la palourde japonaise Ruditapes philippinarum dans les marais atlantiques: faisabilité biologique
Provedor de dados: 5
Autores: 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

Dix ans de production en ecloserie de mollusques bivalves
Provedor de dados: 5
Autores: Leborgne, Y.
SATMAR has developed techniques and methods allowing a production of over 100 million spat per year at a size from 2 to 10 millimetres. Among the 13 species concerned by this production, 3 of major importance are the oysters Crassostrea gigas, Ostrea edulis and the Japanese little neck clam, Ruditapes philippinarum . The hatchery production could easily be doubled if the market would increase. Current research tend to increase the quality of the products by means of genetics and to lower the costs by improving the nursery phase.
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Ostrea edulis; Crassostrea gigas; Bivalvia; Costs; Marine aquaculture; Economics; Hatcheries; Aquaculture enterprises; Ecloserie; Production commerciale; Mollusques bivalves.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1184.pdf

Effets de la surcharge en seston minéral sur les palourdes Japonaises adultes Ruditapes philippinarum
Provedor de dados: 5
Autores: Daou, Rafik.
Negative effects of high turbidity, frequently seen at Marennes-Oleron bay in winter, on Manila clam Ruditapes philippinarum are experimentally studied with two samples during gametogenetic period may september 1987. Thes clams reared at high level of silt (178 mg/l) reduce their growth to about 32% the reproductive effort estimated by gameto-somatic weight index is reduced to 40 %. The high turbid ity is responsible of a twice mortality rate.
Tipo: Text
Palavras-chave: Turbidité; Ruditapes philippinarum; Composition biochimique; Effort de reproduction; Mortalité; Turbidity; Ruditapes philippinarum; Biochemical evolution; Reproductive effort; Mortality.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00430/54175/55516.pdf

Epidémiologie analytique et descriptive des agents pathogènes, étude de la diversité des virus de type herpès (action 1). Etude des relations hôtes/agents pathogènes, pathogénèse des infections à virus de type herpèsvirus (action 2) - Contrat Région Poitou-Charentes 2000-2006
Provedor de dados: 5
Autores: Renault, Tristan; Le Roux, Frederique; Berthe, Franck; Arzul, Isabelle; Miossec, Laurence; Robert, Maeva; Chollet, Bruno.
Nous disposons aujourd'hui d'o utils diagnostiques sensibles et spécifiques (PCR, HIS ... ) et d'un protocole de transmission de l' infection qui permettent d'assurer un suivi des productions larvaires en écloserie de bivalves pour les espèces considérées comme sensibles aux infections à herpèsvirus, mais également pour de nouvelles espèces. En effet, des mortalités massives (100 %) ont été rapportées dans une écloserie de coquille St-Jacques en Bretagne et ont pu être associées à la détection de OsHV -1. Les résultats obtenus concernant cette espèce, Pecten maximus, complètent et reflètent l'ensemble des travaux réalisés.
Tipo: Text
Palavras-chave: Pathologie; Epidémiologie; Virus; Herpès virus; Bivalves; Crassostrea gigas; Ruditapes philippinarum; Pecten maximus.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00043/15472/12851.pdf

Présence du bivalve Veneridae Ruditapes philippinarum (Adams &amp; Reeve, 1850) sur le littoral sud de la Tunisie
Provedor de dados: 20
Autores: 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