Consulta: subjectFacets:"Pecten maximus"
Registros recuperados: 61
Data/hora: 08/06/2024 02:12:20

Paralytic phycotoxin uptake by scallops (Pecten maximus)
Provedor de dados: 5
Autores: Lassus, Patrick; Bardouil, Michele; Ledoux, Martial; Murail, Ingrid; Bohec, Madeleine; Truquet, Philippe; Frémy, Jean-marc; Rohmer, Véronique.
It is difficult to apply sanitary standards for mollusc contamination by paralytic shellfish poisoning to animals not consumed whole. This problem is illustrated by the 1990 embargo on a Japanese shipment of frozen scallop muscle and gonad: the sanitary threshold applied to digestive gland (in Japan) does not guarantee that muscle and especially gonad are toxin-free. Accordingly, we performed experimental contaminations of scallops (Pecten maximus) from Port-en-Bessin (Normandy, France) using a toxic Japanese strain of Alexandrium tamarense. During the contamination/decontamination experiment on different tissues (digestive gland, muscle, gonad), extracts were obtained using cold acetic acid 0.1 N to maintain the perfect integrity of the toxin profile....
Tipo: Text
Palavras-chave: Alexandrium tamarense; Phycotoxines; Bioaccumulation; Profils toxiniques; Pecten maximus; Patinopecten yessoensis; Alexandrium tamarense; Phycotoxins; Bioaccumulation; Toxin profiles; Patinopecten yessoensis; Pecten maximus.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00189/30075/28563.pdf

Les campagnes d'évaluation du stock de coquilles Saint-Jacques en Manche orientale : méthodologie et estimation des indices d'abondance
Provedor de dados: 5
Autores: Vigneau, Joel; Fifas, Spyros; Foucher, Eric.
The methodology used for obtaining absolute abundance indices for Eastern Channel scallop is described in this paper. For the survey (COMOR), stratified multi-stage random sampling is used. The number of sampled units is computed based on variance estimates from the last survey. Knowledge of gear (Brittany dredge with a diving plate) selectivity and efficiency parameters is required for estimating total exploitable biomass and absolute abundance indices by age and strata. Details of the mathematical development of all estimators are given. A non parametric bootstrap provides confidence intervals for all estimates.
Tipo: Text
Palavras-chave: Eastern Channel; Bay of Seine; Dredge; Pecten maximus; Scallop; Survey; Assessment; Manche orientale; Baie de Seine; Drague; Pecten maximus; Coquille Saint Jacques; Campagne; Evaluation.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-6550.pdf

Experimental shift in diet Delta13C: A potential tool for ecophysiological studies in marine bivalves
Provedor de dados: 5
Autores: Paulet, Yves-marie; Lorrain, Anne; Richard, Joëlle; Pouvreau, Stephane.
To test the potential of diet switching experiments in ecophysiological studies of marine invertebrates, stable carbon isotope ratios were measured at different seasons in the gonad, adductor muscle, digestive gland and gills of scallops (Pecten maximus) and oysters (Crassostrea gigas) held for 15 days on a constant diet of phytoplankton depleted in 13C. The aim of this study was to determine if differences in carbon incorporation could be detected among species, seasons and organs, and if so, whether it was consistent with their known energy-allocation patterns. After offering the new diet, isotope values of the different organs gradually shifted and significant differences among organs, seasons and species were found. A carbon incorporation index (CII)...
Tipo: Text
Palavras-chave: Crassostrea gigas; Pecten maximus; Carbon isotopes; Metabolism; Energy allocation.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1202.pdf

SELEDRAG : Etude comparative de la sélectivité des dragues à coquilles Saint-Jacques Pecten maximus
Provedor de dados: 5
Autores: Foucher, Eric; Quinquis, Jerome; Ton, Caroline.
The SELEDRAG project was conducted in French territorial waters in May 2019. It was a short project, lead by the CNPMEM (French National Committee for Marine Fisheries), with Ifremer as scientific partner, and funded by “France Filière Pêche”. The context of the project is the French King Scallop fishery in the Eastern Channel, where 720 fishing boats are directly concerned by this species. Despite its importance, there is very little management for this species at the European level, but several binding rules for French fishermen in order to protect the stock, are not applicable to other countries. One of the French specificity is the ring size used, 92mm for all Scallop fisheries in France vs 85mm (or less) for UK fisheries. Another sharp divergence is...
Tipo: Text
Palavras-chave: Coquille Saint-Jacques; Pecten maximus; Manche Est; Baie de Seine; Sélectivité des dragues; Coquille Saint-Jacques; Pecten maximus; Manche Est; Baie de Seine; Sélectivité des dragues.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00614/72596/71590.pdf

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

Growth anomalies in Pecten maximus from coastal waters (Bay of Brest, France): relationship with diatom blooms
Provedor de dados: 5
Autores: Lorrain, Anne; Paulet, Yves-marie; Chauvaud, Laurent; Savoye, Nicolas; Nezan, Elisabeth; Guerin, Laurent.
The aim of this study was to characterize the daily shell growth of Pecten maximus from early 1998 to late spring 1999 in the Bay of Brest with a careful qualitative and quantitative description of the pelagic primary production. Our results, in accordance with previous studies, demonstrate that there are episodic declines in the growth rate. Concurrent events of low growth rate and large bottom-concentrations of algae following diatom blooms (Cerataulina pelagica or Rhizosolenia delicatula), suggests that this high concentration of phytoplankton on the bottom layer may affect food intake or respiratory activity of the scallops by gill clogging or oxygen depletion. In this study, silicic acid or phosphorus are inferred to be limiting factors responsible...
Tipo: Text
Palavras-chave: Biscay bay; Limiting factors; Primary production; Phytoplankton cnoncentration; Pecten maximus; Growth rate.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-612.pdf

Deep sequencing of the mantle transcriptome of the great scallop Pecten maximus
Provedor de dados: 5
Autores: Artigaud, Sebastien; Thorne, Michael A. S.; Richard, Joelle; Lavaud, Romain; Jean, Fred; Flye-sainte-marie, Jonathan; Peck, Lloyd S.; Pichereau, Vianney; Clark, Melody S.
RNA-Seq transcriptome data were generated from mantle tissue of the great scallop, Pecten maximus. The consensus data were produced from a time course series of animals subjected to a 56-day thermal challenge at 3 different temperatures. A total of 26,064 contigs were assembled de novo, providing a useful resource for both the aquaculture community and researchers with an interest in mollusc shell production.
Tipo: Text
Palavras-chave: Pecten maximus; RNAseq; Temperature.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00202/31362/82662.pdf

New insights into the seasonal feeding ecology of Pecten maximus using pigments, fatty acids and sterols analyses
Provedor de dados: 5
Autores: Lavaud, Romain; Artigaud, Sebastien; Le Grand, Fabienne; Donval, Anne; Soudant, Philippe; Flye-sainte-marie, Jonathan; Strohmeier, Tore; Strand, Oivind; Leynaert, Aude; Beker, Beatriz; Chatterjee, Arnab; Jean, Fred.
We combined the use of pigments, fatty acids and sterols as biomarkers of the seasonal variation in food sources of the great scallop Pecten maximus. From March to October 2011, on a biweekly to twice-weekly basis, scallops and seawater from the water column and the water-sediment interface were collected in the Bay of Brest (Brittany, France). Pigment compositions in the seawater and in the stomach and rectum content of the scallops were analyzed by HPLC. Fatty acids and sterols from digestive gland (DG) tissue were analyzed by gas chromatography. Potential relationships between the temporal proportion of each marker in the environment and in the digestive tract were tested using multivariate analysis. Proportions of diatoms and Dinophyceae biomarkers...
Tipo: Text
Palavras-chave: Trophic ecology; Food sources; Pigments; Fatty acids; Trophic marker; Phytoplankton; Pecten maximus.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00431/54244/55772.pdf

Optimizing sperm cryopreservation in great scallop (Pecten maximus)
Provedor de dados: 5
Autores: Suquet, Marc; Malo, Florent; Gourtay, Clemence; Ratiskol, Dominique; Riobe, Marion; Le Grand, Jacqueline; Queau, Isabelle; Mingant, Christian.
A basic cryopreservation protocol for great scallop sperm was recently published, with which thawed sperm survival remained limited to 25% of control values (Suquet et al. 2014). We designed here a set of five experiments to test ways of improving thawed sperm survival and storage by studying the effects of (1) cryoprotectant concentration; (2) sugar incorporation in the extender; (3) egg yolk addition to the extender; (4) sperm dilution rate; and (5) storage capacity of thawed sperm at 4 degrees C. A sixth experiment was then performed to compare rearing performances of larvae produced using thawed sperm from the optimal protocol defined in the present study with those produced using fresh sperm. During the first experiment, a significantly higher...
Tipo: Text
Palavras-chave: Pecten maximus; Mollusc; Sperm; Cryopreservation; Larval rearing.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00359/47033/46946.pdf

Etudes sur les mortalites larvaires de la coquille st Jacques Pecten maximus en ecloserie
Provedor de dados: 5
Autores: Robert, Rene; Miner, Philippe; Nicolas, Jean-louis; Mazuret, Michel; Connan, Jean-paul.
Larval mortalities occurring in molluscan hatcheries have often been associated with bacterial contamination. Although batches of oyster and clam larvae have been routinely reared in the hatchery of Argenton without antibiotics, high larval mortalities have been recorded with Pecten maxirnus under similar conditions. For this species, an addition of chloramphenicol was found necessary. However, this chemical has now been banned in Europe. Thus either substitition products or an improvement in the rearing procedures is essential. Studies carried out have shown that neither a decrease in larval density (1 larvae. ml"l) nor sea water change frequency (1 per day) had any positive effects. Furthermore, elective substances such as sugars were not suitable and...
Tipo: Text
Palavras-chave: Mortality; Pecten maximus; Hatchery; Larvae; Mollusc; Mortalité; Pecten maximus; Ecloserie; Larve; Mollusque.
Ano: 1995
URL: https://archimer.ifremer.fr/doc/1995/rapport-1568.pdf

1983-2002 : The 20-year development of the King scallop (Pecten maximus) sea-farming industry in the bay of Brest (France) :historical record, results, prospect
Provedor de dados: 5
Autores: Fleury, Pierre-gildas; Carval, Jean-pierre; Muzellec, Marie-louise; Gerard, Andre; Barret, Jean; Cochard, Jean-claude; Dao, Jean-claude.
Tipo: Text
Palavras-chave: France; Fishing management; Seeding; Hatchery; Pecten maximus; King scallop.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/acte-7307.pdf

Effect of sampling location, release technique and time after activation on the movement characteristics of scallop (Pecten maximus) sperm
Provedor de dados: 5
Autores: Suquet, Marc; Quere, Claudie; Mingant, Christian; Lebrun, Luc; Ratiskol, Dominique; Miner, Philippe; Cosson, Jacky.
Sperm characteristics of scallops have not been well described in the scientific literature. The effects of sperm release technique (thermal shock versus serotonin injection), of sperm collection technique (testis sampling versus serotonin injection), of sperm sampling location along the genital tract, of in vitro sperm maturation, and of time post activation on scallop sperm characteristics were assessed in the present work. Whatever sperm release technique used, no significant differences were observed regarding the percentage of motile spermatozoa and the velocity of the average path (YAP). Compared to testicular sperm, a higher percentage of motile spermatozoa, YAP and intracellular adenosine triphosphate (ATP) content were observed for sperm shed...
Tipo: Text
Palavras-chave: Spermatozoa; CASA; Maturation; Sperm motility; Bivalve; Pecten maximus.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00157/26852/24983.pdf

Bivalve hatchery technology: The current situation for the Pacific oyster Crassostrea gigas and the scallop Pecten maximus in France
Provedor de dados: 5
Autores: Robert, Rene; Gerard, Andre.
The French oyster farming industry relies almost exclusively on juveniles collected from the natural environment; the supply of spat produced by hatcheries is low, about 10% of the industry's requirements. Development through selective breeding of oyster stocks which are better suited for aquaculture purposes, is likely to reverse this tendency since only hatcheries will be able to supply such animals. Scallop farming, which at present is poorly developed in France, relies exclusively on hatchery produced spat. Although hatchery technology is constantly being improved, significant production problems remain which must be solved before hatcheries become a major supplier of juveniles for the industry. This paper describes the present state of hatchery...
Tipo: Text
Palavras-chave: Pecten maximus; Crassostrea gigas; Hatchery; Molluscan rearing; Pecten maximus; Crassostrea gigas; Ecloserie; Élevage de bivalve.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-861.pdf

Production artificielle de naissain de coquille Saint-Jacques Pecten maximus (L.) résultats obtenus en 1982 en Rade de Brest
Provedor de dados: 5
Autores: Buestel, Dominique; Cochard, Jean-claude; Gerard, Andre.
Des travaux expérimentaux menés depuis 1977 en rade de Brest ont permis la mise au point d'une méthode de production de naissain de coquille Saint-Jacques dont la fiabilité a été démontrée en 1982. La filière d'élevage comprend quatre phases nécessitant chacune la mise en ouvre de techniques originales sur des sites distincts. La première étape réalisée en écloserie (température 17°C - eau de mer filtrée à 1µ) produit des larves pédiveligères de 250µ. Ces larves reprises dans une nurserie (eau de mer brute filtre à 125µ) donnent des postlarves de 1 à 3 mm. Les deux dernières phases se passent directement en mer ; un premier stade permet de produire des animaux de 10 mm environ qui sont ensuite portés à une taille de 30 mm et plus. Les résultats de l'année...
Tipo: Text
Palavras-chave: Pecten maximus; Coquille Saint Jacques; Production artificielle.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00019/13019/9996.pdf

Evaluation du stock de coquilles Saint-Jacques Pecten maximus du gisement de la baie de Seine. Résultats de la campagne de prospection COMOR 2018 (1er au 19 juillet 2018).
Provedor de dados: 5
Autores: Foucher, Eric.
The assessment of the King scallop stock of the Bay of Seine (Pecten maximus) was carried out in July 2018, in the Bay of Seine sensu stricto, located in French territorial waters (from the Normandy coast to the south to the limit of 12 nautical miles to the North), as well as the bordering zone lying north of this 12-mile limit and up to a latitude of 49°48N to the North, called "Extérieur Baie de Seine". For this, a scientific survey, based on a stratified random sampling plan, was conducted aboard the F/R Thalia, a coastal research vessel of the French Oceanographic Fleet. Nearly 170 sampling points were completed in the whole area. Analysis of these data leads to an overall increase in exploitable biomass over the entire area. In the area “Exterieur...
Tipo: Text
Palavras-chave: Coquille Saint-Jacques; Pecten maximus; Manche Est; Baie de Seine; Evaluation de stock; King scallop; Pecten maximus; Eastern Channel; Bay of Seine; Stock assessment.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00480/59162/61795.pdf

La sensibilité des larves de pectinidés aux conditions d’élevage : le flux ouvert comme alternative aux mortalités massives
Provedor de dados: 5
Autores: Holbach, Marine.
In many countries, aquaculture of pectinids depends on the success of artificial spat production in hatchery. This production is always unpredictable due to the variability of hatching rate and larval survival. Flow-through larval rearing systems were developed in Norway for the King scallop Pecten maximus and showed promising results. Unfortunately the system needs to be optimized since the larval yields and the densities used are still relatively low. In France, a small-scale (5 L) and high-density (≤ 300 larva mL-1) flow-through larval rearing system was successfully developed for oysters. First trials in such system and in similar conditions with P. maximus failed as we registered slower growth and high mortality rate in only a few days. It is known...
Tipo: Text
Palavras-chave: Pectinidés; Pecten maximus; Écloserie; Élevage larvaire; Flux ouvert; Contamination bactérienne; Prophylaxie; Physiologie larvaire; Indices de stress.; Pectinids; Pecten maximus; Hatchery; Larval rearing; Flow-through; Bacterial contamination; Prophylaxis; Larval physiology; Stress index.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00259/37000/35491.pdf

Genetic structure of a commercially exploited bivalve, the great scallop Pecten maximus, along the European coasts
Provedor de dados: 5
Autores: Morvezen, Romain; Charrier, Gregory; Boudry, Pierre; Chauvaud, Laurent; Breton, Florian; Strand, Oivind; Laroche, Jean.
The great scallop Pecten maximus is harvested in several European countries and fisheries targeting this species are severely regulated by fishing quotas. In addition, hatchery-based population enhancement has been developed in some countries to provide alternative or complementary production. The genetic structure of wild populations of P. maximus and the potential impact of aquaculture on the genetic diversity of this species remains poorly documented. In this study, we explored the genetic structure of P. maximus using 12 microsatellite markers, considering 14 populations sampled from Galicia (Spain) to the North of Norway, and one population of Pecten jacobaeus (L., 1758) from the Lion Gulf (Mediterranean Sea). Results indicated a clear differentiation...
Tipo: Text
Palavras-chave: Great scallop; Pecten maximus; Microsatellites; Population genetics; Aquaculture.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00311/42251/41692.pdf

Observations sur la viabilité des oeufs de la coquille Saint Jacques en Rade de Brest
Provedor de dados: 5
Autores: Cochard, Jean-claude.
La production de naissain de Pecten maximus destiné au repeuplement de la rade de Brest a nécessité le déclenchement de la ponte de plusieurs centaines d'individus au cours des années 1980 à 1984. L'analyse de ces données permet de faire quelques constatations sur le cycle sexuel de la coquille Saint-Jacques dans cette zone. - Le cycle sexuel de la population est très étalé dans le temps. Des pontes d'apparence normale peuvent être obtenues chaque mois sans qu'il soit nécessaire de recourir au conditionnement. - La fécondité, estimée par le nombre moyen d'ovocytes recueillis par reproducteur, varie au cours du cycle annuel. Les pontes les plus abondantes ont lieu de février à avril (12 à 20 millions d'ovocytes par coquille en moyenne) et en octobre. En été...
Tipo: Text
Palavras-chave: Ovocytes; Pecten maximus; Coquille Saint Jacques; Reproduction; Naissain.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-6540.pdf

Effects of bioactive extracellular compounds and paralytic shellfish toxins produced by Alexandrium minutum on growth and behaviour of juvenile great scallops Pecten maximus
Provedor de dados: 5
Autores: Borcier, Elodie; Morvezen, Romain; Boudry, Pierre; Miner, Philippe; Charrier, Gregory; Laroche, Jean; Hegaret, Helene.
Dinoflagellates of the genus Alexandrium are a major cause of harmful algal blooms (HABs) that have increasingly disrupted coastal ecosystems for the last several decades. Microalgae from the genus Alexandrium are known to produce paralytic shellfish toxins (PST) but also bioactive extracellular compounds (BEC) that can display cytotoxic, allelopathic, ichtyotoxic or haemolytic effects upon marine organisms. The objective of this experimental study was to assess the effects of PST and BEC produced by A. minutum upon juvenile great scallops Pecten maximus. Scallops were exposed for one week to two different strains of A. minutum, the first producing both PST and BEC and the second producing only BEC. Escape response to starfish, daily shell growth,...
Tipo: Text
Palavras-chave: Harmful Algal Bloom (HAB); Alexandrium minutum; Pecten maximus; Paralytic Shellfish Toxins (PST); Extracellular compounds; Behaviour; Histology.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00368/47878/47893.pdf

Trophic relationships gonad-intestinal loop in Pecten maximus .
Provedor de dados: 5
Autores: Lepennec, M; Dorange, G; Beninger, P; Donval, A; Widowati, I.
Histological, histochemical and ultrastructural studies were performed on the region of the gonad traversed by the intestine in Pecten maximus . The results indicate a digestive and absorptive function of intestine epithelial cells and a transfer of metabolites to the surrounding gonad tissue. Several possible mechanisms of translocation are presented, including diffusion into the haemolymph and transfer via vacuolated cells of the gonad interstitial connective tissue.
Tipo: Text
Palavras-chave: Pecten maximus; Bivalvia; Histology; Haemolymph; Histochemistry; Cells; Metabolites; Epithelia; Intestines; Ultrastructure; Animal reproductive organs.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-1668.pdf

Localisation immunohisto chimique de peptides apparentes aux hormones de vertebres chez Pecten maximus
Provedor de dados: 5
Autores: Donval, A.
Substances related to vertebrate peptidic hormones have been searched by immunohistochemical methods in Pecten maximus . Neurosecretory cells have been detected in the nervous ganglia with antisera raised against vertebrate hormones, gastrin/CCK like, glucagon like, insuline like, somatostatine like. Other gastro-intestinal hormones like are localized in some cells of the gut epithelium: bombesine and vasoactive intestinal peptide.
Tipo: Text
Palavras-chave: Pecten maximus; Bivalvia; Immunology; Histochemistry; Cells; Neurosecretory system; Juveniles; Hormones.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-1724.pdf

Relations entre le contenu lipidique des ovocytes de Pecten maximus (Mollusque, bivalve) et les performances des larves en élevage
Provedor de dados: 5
Autores: Le Pennec, Marcel; Gueguen,.
The lipid content of spawned oocytes of Pecten maximus was studied by image analysis of semi -thin histological sections and a lipid index was defined. The female gametes were obtained by thermic stimulations of mature adults scallops from different populations after out of season conditioning or sampled in situ during the spawning season. After fertilization, the larval development was followed. The results reveal a large variability in lipid content of normal oocytes. The lipid content can be regarded as homogeneous inside a spawning but the heterogeneity is greater for wild scallops than for conditioned ones. A strong relationship appears between the lipid index and the hatching success, and the number of abnormal larvae after two days rearing. But no...
Tipo: Text
Palavras-chave: Mollusques; Bivalves; Pecten maximus; Ovocytes; Lipides; Elevages larvaires; Mollusc; Bivalve; Pecten maximus; Oocytes; Lipids; Larval development.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00022/13345/10379.pdf

Effet de la qualité de l'eau sur la croissance larvaire de Pecten maximus en écloserie : observations préliminaires
Provedor de dados: 5
Autores: Samain, Jean-francois; Cochard, Jean-claude; Chevolot, Lionel; Daniel, Jean-yves; Jeanthon, C.; Le Coz, Jean-rene; Marty, Y.; Moal, Jeanne; Prieur, D.; Salaun, Michele.
Some positive growth differences can be observed, all year long, in Pecten maximus larvae cultivated in an old fishpond, compared with the water which flows into it periodically. These waters are filtered at 1 µm through CUNO cartridges. Moreover, the larvae are cultivated in the same light, temperature and food (cultured phytoplankton) conditions. This difference is significant in terms of larvae size, dry weight, organic matter, ashes, total proteins, glycogen, and lipids. A series of preliminary observations on the chemical composition of these two waters after filtration (amino acids, fatty acids, organic mater, nutritive salts), on the bacterial flora (total, heterotrophic organisms, vibrio), on the particular material using electron microscopy, on...
Tipo: Text
Palavras-chave: Larve; Ecloserie; Pecten maximus; Facteur croissance; Qualité eau.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-6185.PDF

Some methods for quantifying quality in the scallop Pecten maximus (L.)
Provedor de dados: 5
Autores: Maguire, Julie A.; Fleury, Pierre-gildas; Burnell, Gavin M.
(Not controled OCR) Because biological systems do not work in isolation, behavioral, biochemical, and physiological tests can give an overview of an individual's vital processes and reaction to stress. Two stress gradients were applied in this study, a short acute desiccation stress and a long-term density stress. These stress gradients were used to assess the usefulness of various techniques for quality assessment: namely, a standard salinity stress test, condition index, recessing speed of the scallop, adenylic energetic charge (AEC). and percentage carbohydrate content of the striated muscle. The results showed that AEC could be used effectively to measure the effect of a short-term stress. In the striated muscle. AEC levels were useful in...
Tipo: Text
Palavras-chave: Density; Desiccation; Quality; Stress; Pecten maximus.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-2450.pdf

New insights into the reproductive cycle of two Great Scallop populations in Brittany (France) using a DEB modelling approach
Provedor de dados: 5
Autores: Gourault, Melaine; Lavaud, Romain; Leynaert, Aude; Pecquerie, Laure; Paulet, Yves-marie; Pouvreau, Stephane.
The present study aimed to improve understanding of the environmental conditions influencing the reproductive cycle of the great scallop Pecten maximus in two locations in Brittany (France). We also evaluated potential consequences of future climate change for reproductive success in each site. We simulated reproductive traits (spawning occurrences and synchronicity among individuals) of P. maximus, using an existing Dynamic Energy Budget (DEB) model. To validate and test the model, we used biological and environmental datasets available for the Bay of Brest (West Brittany, France) between 1998 and 2003. We also applied the scallop DEB model in the Bay of Saint-Brieuc (North Brittany, France) for the same period (1998–2003) to compare the reproductive...
Tipo: Text
Palavras-chave: Pecten maximus; DEB theory; Reproduction cycle; IPCC scenarios; Bay of Brest; Bay of Saint-Brieuc.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00458/57012/58910.pdf

The food value of starch rich flagellates for Pecten maximus (Linné) larvae. Preliminary results
Provedor de dados: 5
Autores: Robert, Rene; Moal, Jeanne; Campillo, Maria-josé; Daniel, Jean-yves.
Pecten maximus larvae exhibit amylase as a main digestive enzyme indicating the possibility of starch hydrolysis. The food value of Rhodomonas salina and Porphyridium cruentum, both rich in starch, on the development of Pecten maximus larvae was investigated. The larval development was studied by means of an image analysis technique and epifluorescence microscopy was used for detecting ingestion and digestion of each phytoplankton species. The biochemical contents of algae and larvae were also assessed. The best growth of Pecten maximus larvae was observed when fed with the mixture PTS (plurispecific control). No growth was observed for larvae fed with Porphyridium cruentum of which most of the population died on day 16 (90%). This algal species was...
Tipo: Text
Palavras-chave: Larvae; Food value; Pecten maximus.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/publication-6192.PDF

Cycles saisonniers, reproduction et qualite des ovocytes chez Pecten maximus en rade de Brest
Provedor de dados: 5
Autores: Paulet, Yves-marie; Bekhadra, Farida; Devauchelle, Nicole; Donval, Anne; Dorange, Germaine.
This work is part of the program, "recruitment determinism in scallops" initiated in 1992 by the "Contrat de Baie". The aim of this research was to explain interannual abundance fluctuations observed for Pecten maximus, in the Bay of Brest. To this end an analytical approach to the life cycle of the species was undertaken to determine its critical phases. A phase may be considered as "critical" if the mortality rate at its level varies from one year to the other. Using data from 1989 to 1994, a precise time-table of the "physiological year" of the scallop in the Bay of Brest was determined. Fecundity and gamete production kinetics were estimated from the annual variation in the weight indices of the gonad. In the laboratory, egg quality was estimated...
Tipo: Text
Palavras-chave: Pecten maximus; Recruitment; Reproductive cycle; Digestion.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00044/15495/12861.pdf

Les variations de la fécondité de la coquille Saint-Jacques de la Rade de Brest en écloserie au cours du cycle annuel
Provedor de dados: 5
Autores: Cochard, Jean-claude.
Among the different biological factors which can have an impact on the recruitment of the king scallop, the relationship between the number of produced oocytes and the number of obtained larvae can be tackled from an experimental point of view. In the framework of the repopulation program of the roadsted of Brest (king scallop pluri-annual program), the hatchery spat production trials (Buestel et al., 1982) enabled the monitoring of the variations of the real fertility of Pecten maximus over a year cycle. The natural egg-laying period in the roadsted of Brest spreads from June through to September, but egg-laying can also be triggered artificially all year long. The results obtained during production trials in 1982-1983 and the action of low temperatures...
Tipo: Text
Palavras-chave: Ecloserie; Production naissain; Fécondité; Pecten maximus; Coquille Saint Jacques; Ponte.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-6537.pdf

Effects of hydrodynamic factors on     Pecten maximus     larval development
Provedor de dados: 5
Autores: Holbach, Marine; Robert, Rene; Miner, Philippe; Mingant, Christian; Boudry, Pierre; Tremblay, Rejean.
Hatchery production of great scallop, Pecten maximus, remains unpredictable, notably due to poor larval survival. Large-scale flow-through systems up to 3500 L have been developed to avoid the use of antibiotics in static systems. Alternatively, small-scale flow-through systems have been successfully applied for oysters but they proved to be unsuitable to rear scallop larvae. By focusing on physical factors presumed to limit P. maximus larval development, this study aimed to optimize great scallop larvae rearing parameters under controlled conditions. First, the influence of aeration on larval performances, energetic metabolism and antioxidant defences were studied both in static and flow-through systems. Aeration depressed larval food intake, regardless...
Tipo: Text
Palavras-chave: Aeration; Flow-through; Larval physiology; Pecten maximus.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00384/49508/51151.pdf

Toxicity to bivalve hemocytes of pathogenic Vibrio cytoplasmic extract
Provedor de dados: 5
Autores: Lambert, Christian; Nicolas, Jean-louis; Bultel, Valérie.
Using a chemiluminescence (CL) test, it had been previously demonstrated that Vibrio pectenicida, which is pathogenic to Pecten maximus larvae, was able to inhibit completely the CL activity of P, maximus hemocytes and partially inhibit those of Crassostrea gigas, Conversely, a Vibrio sp, strain, S322, pathogenic to C,gigas larvae was more active in reducing the CL activity of oyster hemocytes than of scallop hemocytes, Using this same CL biotest, V, pectenicida and S322 cytoplasmic extracts were shown to reproduce CL inhibition while the cytoplasmic extract of a nonpathogenic strain (U1, Pseudoalteromonas) was without effect. Moreover, cytoplasmic extract as well as live V, pectenicida cells provoked, within a few hours, death of P. maximus hemocytes...
Tipo: Text
Palavras-chave: Bivalves; Hemocyte; Toxin; Chemiluminescence; Crassostrea gigas; Pecten maximus; Vibrio pectenicida.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-466.pdf

Ontogenic changes in the contents of dopamine, norepinephrine and serotonin in larvae and postlarvae of the bivalve Pecten maximus
Provedor de dados: 5
Autores: Cann Moisan, Christine; Nicolas, Laurence; Robert, Rene.
In the present study, norepinephrine (NE), epinephrine (E), dopamine (DA) and 5-hydroxy-tryptamine (5HT) have been quantified by high performance liquid chromatography (HPLC) in Pecten maximus during larval and post-larval development. With average values ranging from 2 to 5 pg mug(-1) of protein, NE remained low through the whole larval life, while epinephrine (E) was undetected. DA and 5HT were the most abundant monoamines with significant variations between larval, pre-metamorphic and post-larval stages. During the first 20 days, corresponding to D larval and umboned larval stages, levels of DA and 5HT increased from 15 to 30 and 10 to 15 pg mug(-1) of protein, respectively. Then during the last week of larval life, at the approach of metamorphosis, DA...
Tipo: Text
Palavras-chave: Pecten maximus; Metamorphosis; Post larvae; Larvae; Monoamines.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-568.pdf

La densite, un critere de qualite applicable en ecloserie aux embryos de Pecten maximus (mollusque bivalve)
Provedor de dados: 5
Autores: Faure, Catherine; Devauchelle, Nicole; Dorange, Germaine.
The quality of the scallop embryos is determined by the spawners characteristics as well as by the external factors they support during the maturation and the spawning phases. All these parameters are not still well controlled during the artificial conditioning in the hatcheries. As a consequence, the quality of the embryos is drastically variable and with them, the larvae performances in terms of survival and growth rates. It would be interesting to get a simple and quick test which would allow the estimation of the spawns quality. The embryos density, evaluated by isopycnic centrifugation of Percoll medium, is well adapted to this objective. Actually, a centrifugation of embryos two hours after fertilization separates them in 3 stratum with their density...
Tipo: Text
Palavras-chave: Pecten maximus; Bivalvia; Quality; Survival; Larvae; Growth; Sexual maturity; Spawning populations; Spawning; Embryos; Hatcheries.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-915.pdf

Exploitation, éléments de croissance et de dynamique du stock de coquilles Saint-Jacques (Pecten maximus, L.) des Pertuis Charentais
Provedor de dados: 5
Autores: Blanchard, Fabian.
Tipo: Text
Palavras-chave: Bay of Biscay; Pecten maximus; Growth; Exploitation; Stock assesment.
Ano: 1995
URL: https://archimer.ifremer.fr/doc/1995/rapport-523.pdf

The quality of great scallop (Pecten maximus) sperm after thawing
Provedor de dados: 5
Autores: Suquet, Marc; Gourtay, Clemence; Donval, Anne; Le Goic, Nelly; Quere, Claudie; Malo, Florent; Le Grand, Jacqueline; Ratiskol, Dominique; Mingant, Christian; Fauvel, Christian.
Most publications devoted to the cryopreservation of mollusc sperm have focused on the definition of technical protocols, avoiding the description of sperm quality after thawing. The present study investigated the effects of cryopreservation on sperm quality in the great scallop. Wild scallop were fished during the natural spawning period and conditioned in the hatchery before use. Sperm samples were obtained after intragonadal injection of serotonin and cryopreserved using a previously published protocol.  Sperm quality was assessed using a panel of four parameters: sperm motility characteristics, using a a computer assisted sperm analysis plugin with Image J, intracellular ATP content using an ATP-Lite kit, sperm integrity, using flow cytometry and sperm...
Tipo: Text
Palavras-chave: Pecten maximus; Reproduction; Gamete; Sperm; Cryopreservation.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00317/42862/43912.pdf

Caracteristiques ultrastructurales du spermatozoide de la coquille Saint-Jacques, Pecten maximus (Mollusque, Bivalve)
Provedor de dados: 5
Autores: Dorange, G; Lepennec, M.
The spermatozoon of Pecten maximus is of the primitive type usually associated with species having external fertilization or emitting the sperm in the water. The size of the nucleus is reduced. The middle piece is similar to that reported for several Bivalves. It contains glycogen. But the spermatozoon of P. maximus exhibits its own ultrastructural characteristics: the short acrosome differs in size, shape, position and ultrastructure or by a combination of these from that of many bivalves. No axial rods was observed in contrast to several species of Mytilidae, Veneridae and Ostreidae. These originalities could go to the genus level.
Tipo: Text
Palavras-chave: Pecten maximus; Bivalvia; Ultrastructure; Sperm.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-1725.pdf

Monoclonal antibody against a gill Rickettsiales-like organism of Pecten maxiumus (Bivalvia): application to indirect immunofluorescence diagnosis
Provedor de dados: 5
Autores: Le Gall, Gyslaine; Mourton, Chantal; Boulo, Viviane; Paolucci, Francis; Pau, Bernard; Mialhe, Eric.
Using hybridoma technology, monoclonal antibodies (MABs) were prepared against a Rickettsiales-like organism (RLO) from the gills of the Saint-Jacques scallop Pecten maximus. The 5D7 MAB was then selected as a specific reagent suitable for an indirect immunofluorescence assay (IIFA) and evaluated for RLO diagnosis on P. maxiumus gill smears. Monoclonal antibody 5D7 showed no cross-reactivity with an RLO associated with a related pectinid species Chlamys opercularis
Tipo: Text
Palavras-chave: Diagnosis; Rickettsiales like organism; Monoclona antibody; Pecten maximus.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/publication-2762.pdf

Production artificielle de naissain de coquilles Saint-Jacques Pecten maximus (L.). Premiers résultats en rade de Brest
Provedor de dados: 5
Autores: Buestel, Dominique; Cochard, Jean-claude; Dao, Jean-claude; Gerard, Andre.
Artificial production from natural spawners could be a way of getting big quantities of spat of Pecten maximus, ln the method described, larval phase (until a size of 250 microns) occurs in a hatchery, post-Iarval phase (from 250 µ until 3 millimeters) in a nursery, and first growth period directly into the sea (from 2 mm to a size of 25-30 mm), The fifst results obtained, production of several thousand of individuals good enough for reseeding, seem to be transposable to a larger scale.
Tipo: Text
Palavras-chave: Restocking; Intermediate culture; Hatchery; Nursery; Pecten maximus; Repeuplement; Prégrossissement; Ecloserie; Nurserie; Pecten maximus.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-6529.pdf

Pathogenic threats and probiotic use in larviculture of the scallop, Pecten maximus
Provedor de dados: 5
Autores: Kesarcodi-watson, Aditya; Miner, Philippe; Nicolas, Jean-louis; Asmani, Katia; Robert, Rene.
During a series of experiments, bacteriological elements in scallop larval rearing were investigated: larvae susceptibility to pathogens as a function of their age, and the use of probiotic bacteria during larviculture. Younger larvae (d5 PF) were highly more susceptible to pathogenic-challenge than their older siblings, which were challenged at an older age (d15 PF). A challenge with 104 CFU mL−1 of V. pectenicida killed 100% of d5 PF larvae 7 days following challenge, yet killed only 9% of d15 PF larvae 9 days following challenge. Use of the probiotics Phaeobacter gallaeciensis, Alteromonas macleodii 0444 and Neptunomonas sp. 0536, provided for larger larvae, a high yield of competent larvae and, perhaps more importantly, protection against...
Tipo: Text
Palavras-chave: Scallop; Pecten maximus; Probiotics; Alteromonas macleodii; Neptunomonas; Phaeobacter.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00210/32153/30900.pdf

Effect of shear velocity and flow regimes on scallop post-larval detachment feed on two different diets
Provedor de dados: 5
Autores: Gagne, Renee; Tremblay, Rejean; Olivier, Frederic; Pernet, Fabrice; Miner, Philippe; Samain, Jean-francois.
Through biological flume experiments, we studied the effect of shear velocity and attachment period on the percent detachment of Pecten maximus post-larvae of different sizes reared on two experimental diets. The first diet, (Pavlova lutheri, Isochrysis galbana, Chaetoceros calcitrans), which served as a reference diet (PTC), is commonly used in bivalve hatcheries; the second is the PTC diet with the addition of Rhodomonas salina (PTCR). Our results indicate that the detachment of post-larvae fed PTCR diet showed significant interactions between scallop length, attachment period and shear stress, while the post-larvae feed with the PTC diet showed only effect of shear stress factor. Furthermore, post-larvae exposed to various flume velocities showed...
Tipo: Text
Palavras-chave: Attachment; Pecten maximus; Benthic boundary layer; Flume; Diet.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00111/22219/20056.pdf

Variabilité génétique de populations de Pecten maximus L. en Bretagne
Provedor de dados: 5
Autores: Huelvan, Serge.
L'étude de la variabilité génétique chez Pecten maximus a porté sur cinq populations naturelles issues des sites suivants: la rade de Brest, la baie de Saint-Brieuc, la baie de Seine, l'ile de Skye (Ecosse) et la baie de Mulroy (Irlande). Les trois premières populations ont été échantillonnées sur leurs milieux d'origine, tandis que les populations britaniques ont été importées sous forme de naissain et semées sur deux sites différents : la rade de Brest la baie de Saint-Brieuc. L'analyse du polymorphisme enzymatique, basée sur l'étude de 13 locus (8 polymorphes et 5 monomorphes), monte que la plupart des populations étudiées sont génétiquement proches les unes des autres, à l'exception de la population d'Irlande. Cette dernière se différencie de façon...
Tipo: Text
Palavras-chave: Pecten maximus; Pecten jacobaeus; Coquille St Jacques; Polymorphisme enzymatique; Ecoloserie.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00444/55523/57111.pdf

Le programme de repeuplement de coquille Saint-Jacques : finalité, résultats et perspectives
Provedor de dados: 5
Autores: Dao, Jean-claude; Buestel, Dominique; Gerard, Andre; Halary, C.; Cochard, Jean-claude.
The king scallop (Pecten maximus L.) has been the object of some in-depth studies since 1973 with the double aim of natural resources management and extensive aquaculture in mind. The results obtained during the first ten years enabled the launch of a pluri-annual 1983-1987 program which aims to demonstrate the re-populating of the roadsted of Brest and the introduction of new management methods in the Bay of Saint-Brieuc. The technical results of the resource management and of the aquaculture operations are described. They enabled the stabilisation of the annual production of the Saint-Brieuc deposit as well as to foresee a new biomass of 80-100 tonnes of spawners per year in the roadsted of Brest. However, the implementation of all these developments is...
Tipo: Text
Palavras-chave: Croissance juvéniles; Gisement; Pecten maximus; Coquille Saint Jacques; Repeuplement.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-6531.pdf

Etude experimentale de la maturation ovocytaire chez Pecten maximus et Crassostrea gigas (Mollusca, Bivalvia)
Provedor de dados: 5
Autores: Widowati, L; Cochard, Jean-claude; Dorange, G; Le Pennec, M.
To date, it has been impossible to fertilize the oocytes of ripe Pecten maximus obtained by gonad stripping as it is routinely done in hatchery with Crassostrea gigas . The events occurring between artificial induction of spawning and normal fertilization were studied experimentally in order to explain this difference. Fertilization and rearing trials were performed on oocytes obtained from the gonads of both species by scarification, by aspiration from genital ducts (of P. maximus only) and after spawning. Every batch of oocytes was fixed for histological study. Serial sections of the gonad of a fixed spawning P. maximus were made to reveal modifications of the nucleus of the oocytes during their expulsion. In P. maximus the stripped oocytes can be...
Tipo: Text
Palavras-chave: Crassostrea gigas; Pecten maximus; Bivalvia; Marine molluscs; Animal reproductive organs; Larvae; Fecundity; Experimental research; Spawning; Sexual maturity.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-1632.pdf

Effect of the probiotic strain Phaeobacter gallaeciensis after bacterial challenge on the complete larval development of Pecten maximus
Provedor de dados: 5
Autores: Genard, Bertrand; Larouche, Olivier; Nicolas, Jean-louis; Miner, Philippe; Beaudin, Marie-lou; Tremblay, Rejean.
The aim of this project was to evaluate the impact of probiotic (Phaeobacter gallaeciensis, X34 strain) treatment on the complete development (from veliger to metamorphosis) of Pecten maximus larvae in the context of a bacterial challenge and in conditions more representative of hatchery practices. To that effect, the present study was divided into two main steps. In the first, we used in vitro analyses (antibiograms and microplate assays) to validate the inhibition abilities of X34 on the growth of four Vibrio pathogen species. During the second step, we added pathogens (Vibrio pectenicida) into rearing tanks after two weeks of pre-treatment with the probiotic and then followed the larval development of Pecten maximus through the monitoring of survival...
Tipo: Text
Palavras-chave: Probiotics; Hatchery; Bacterial challenge; Larval development; Pecten maximus; Phaeobacter gallaeciensis; Vibrio.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00213/32429/30895.pdf

Review of the reproductive physiology of the scallop, Pecten maximus, applicable to intensive aquaculture
Provedor de dados: 5
Autores: Devauchelle, Nicole; Mingant, Christian.
This paper presents a summary of information on reproduction biology in the scallop, Pecten maximus, which is required for the successful reseeding and intensive aquaculture programs developed in France since 1982. Data are presented on the following subjects: environmental factors that sustain gametogenic activity and the time of year this activity occurs; biochemical changes that are associated with gametogenesis; the consistency of egg quality; and development of a simple test to predict egg quality.
Tipo: Text
Palavras-chave: Aquaculture; Pecten maximus; Ecloserie; Physiologie de la reproduction; Embryon; Gamète; Aquaculture; Pecten maximus; Scallop; Hatchery; Reproductive physiology; Egg quality; Embryo; Gamete.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00038/14890/12216.pdf

Evaluation du stock de coquilles Saint‐Jacques Pecten maximus de la baie de Seine. Résultats de la campagne scientifique COMOR 2019 (2 au 20 juillet 2019).
Provedor de dados: 5
Autores: Foucher, Eric.
The assessment of the King scallop stock of the Bay of Seine (Pecten maximus) was carried out in July 2019, in the Bay of Seine sensu stricto, located in French territorial waters (from the Normandy coast to the south to the limit of 12 nautical miles to the North), as well as the bordering zone lying north of this 12-mile limit and up to a latitude of 49°48N to the North, called "Extérieur Baie de Seine". For this, a scientific survey, based on a stratified random sampling plan, was conducted aboard the F/R Thalia, a coastal research vessel of the French Oceanographic Fleet. Nearly 170 sampling points were completed in the whole area. Analysis of these data leads to an overall increase in exploitable biomass over the entire area. Outside the Bay of Seine,...
Tipo: Text
Palavras-chave: Coquille Saint-Jacques; Pecten maximus; Manche Est; Baie de Seine; Evaluation de stock; King scallop; Pecten maximus; Eastern Channel; Bay of Seine; Stock assessment.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00516/62739/67128.pdf

Infection à virus de type herpès chez les larves de coquilles Saint-Jacques
Provedor de dados: 5
Autores: Arzul, Isabelle; Nicolas, Jean-louis; Renault, Tristan.
King scallop (Pecten maximus) larvae suffered massive mortality during the summer of 2000 at a hatchery located in Brittany. Samples were taken for various types of analyses.
Tipo: Text
Palavras-chave: Pathologie; Pecten maximus; Coquilles St Jacques; Herpesvirus; Herpesviridae.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/acte-3267.pdf

Le stress du passage en mer de post-larves de coquilles Saint-Jacques (Pecten maximus) issues d'écloserie
Provedor de dados: 5
Autores: Philippe, Régis.
Le transfert en mer de post-larves de coquille Saint-Jacques depuis la nurserie, à terre, jusqu'à la station de prégrossissement, en mer, provoque de faibles survies : 20 à 50 % L'étude du passage en mer montre 2 stress élémentaires principaux : la dé-fixation des post-larves et leur émersion pendant le transport (l'effet des chocs thermiques n'a pas été étudié ici). Quelques comparaisons de lots de post-larves dé-fixées ou émergées, montrent que la cause principale de mortalité serait la dé-fixation. La dernière partie de cette étude aborde des essais de transfert sans dé-fixation, à l'aide de supports-collecteurs immergés pendant l'élevage post-larvaire. Les survies au passage en mer apparaissent beaucoup plus satisfaisantes (64 à 100 % dans la plupart...
Tipo: Text
Palavras-chave: Coquille Saint-Jacques; Pecten maximus; Naissain; Passage en mer; Stress; Dé-fixation; Emersion; Collecteurs.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00422/53377/54221.pdf

French scallops: A new host for ostreid herpesvirus-1
Provedor de dados: 5
Autores: Arzul, Isabelle; Nicolas, Jean-louis; Davison, Andrew J.; Renault, Tristan.
Sporadic high mortalities were reported among larval French scallops (Pecten maximus). Electron microscopy of moribund larvae revealed particles with the characteristics of a herpesvirus in association with cellular lesions. PCR and DNA sequencing showed that the virus is a variant of ostreid herpesvirus-1 that has already been described in clams and oysters. This is the first description of a herpesvirus infection of a scallop species. The virus was transmitted successfully from an extract of infected scallop larvae to uninfected scallop or oyster (Crassostrea, gigas) larvae, demonstrating that it is able to infect both species. Detection of viral DNA in asymptomatic adult scallops by in situ hybridisation indicates that the herpesvirus may have been...
Tipo: Text
Palavras-chave: Bivalve; Host range; Transmission; Polymorphism; OsHV 1; Pecten maximus; Scallop; Herpesvirus.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-739.pdf

La Biominéralisation de Pecten maximus L. : Anomalies liées aux Perturbations du Milieu
Provedor de dados: 5
Autores: Larvor, Helene.
L'étude du brunissement pathologique des valves de la coquille Saint-Jacques a permis d'identifier différents types d'altérations des mécanismes de la calcification : des détériorations microstructurales concomitantes avec une pigmentation brune anormale de la couche interne des tests. Les mécanismes de biominéralisation contrôlant l'intégration du carbonate de calcium dans les structures coquillières ne sont pas altérés : le taux de calcium, la minéralogie et la composition en acides aminés des matrices organiques cristallines sont équivalents dans les valves brunes et les valves blanches. Par contre, la présence d'une eumélanine, responsable de la coloration brune, est détectée dans les matrices organiques insolubles des régions coquillières aux...
Tipo: Text
Palavras-chave: Calcification; Coquille; Mélanine; Microstructure; Pecten maximus; Mollusques; Perturbations environnementales; Biominéralisation.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00043/15449/12823.pdf

Ecophysiologie de coquillages contaminés par des microalgues toxiques : premiers essais
Provedor de dados: 5
Autores: Rohmer, Véronique.
Afin d'évaluer les effets d'une contamination expérimentale par des microalgues toxiques sur la filtration,· des bivalves (Pecten maximus, Crassostrea gigas et Mytilus edulis) ont été alimentés pendant quelques heures avec différents régimes : des cultures très toxiques (Alexandrium tamarense, souche japonaise), moyennement toxique (A. minutum, souche française) et non toxique (A. tamarense, souche anglaise) de dinoflagellés, et une culture non toxique témoin d'une chlorophycée : Tetraselmis suesica. Les différents essais réalisés montrent que l'utilisation de rouge neutre ne permet pas de comparer les activités valvaires dans les conditions expérimentales. L'enregistrement direct de l'activité valvaire est intéressant mais difficilement reproductible dans...
Tipo: Text
Palavras-chave: Pecten maximus; Mytilus edulis; Crassostrea gigas; Ecophysiologie; Microalgues toxiques; Paralytic Shellfish Poison.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00429/54043/55314.pdf

Evaluation du stock de coquilles Saint-Jacques de la Baie de Seine et du Proche Extérieur. COMOR 32 (8-23 juillet 2002)
Provedor de dados: 5
Autores: Foucher, Eric.
Scientific scallop surveys called COMOR are carried out in the bay of Seine since 1976. Results are used by fishermen’ associations and by fishing administration to lead management measures. In this report, the scientific results of the survey COMOR 32 realised in July 2002 are described. Abundance and growth indices for scallop, by age and area, are presented. During these surveys, data about most abundant benthic species are also collected since 1998. A first assessment with five years data is made here. A global descriptive analysis is undertaken about all the species present on scallops grounds. A special zoom is applied on both species whitch could be exploited (whelk Buccinum undatum and queen scallop Aequipecten opercularis) and three competitive...
Tipo: Text
Palavras-chave: Coquille Saint-Jacques; Pecten maximus; Baie de Seine; Évaluation directe; Stock; Diagnostic; Scallop survey; Pecten maximus; Bay of Seine; Assessment; Stock.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00341/45178/44575.pdf

Collecte de naissain de pectinidés en Bretagne
Provedor de dados: 5
Autores: Buestel, Dominique; Dao, Jean-claude; Lemarie, Gilles.
Since 1973 some pectinides spat collection experiments have been conducted by the Fishery team of the Brittany Oceanology Centre, on two deposits exploited by commercial fishing: the roadsted of Brest and especially the St-Brieuc Bay The experiment carried out in 1973 was the first French attempt on this group of species and the results have been very encouraging: although the technology used was rudimentary, the best collectors enabled the collection of 30 to 50 king scallops (Pecten maximus) each and of 6,000 to 8,000 scallops (Chlamys varia and Chlamys opercularis). The research protocol used enabled the determination of the sequential aspect of the fixation, and of the growth speed of the young animals. In addition, the difference between both deposits...
Tipo: Text
Palavras-chave: Collecteur; Bretagne; Coquilles Saint Jacques; Pecten maximus; Reproduction; Naissain.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/acte-6542.pdf

Un modèle empirique du recrutement pour le stock de coquilles Saint Jacques, Pecten maximus (L.) en baie de Saint-Brieuc (Manche, France)
Provedor de dados: 5
Autores: Fifas, Spyros; Dao, Jean-claude; Boucher, Jean.
This paper proposes an empirical model for the recruitment of the scallop stock, Pecten maximus (L.), in Saint-Brieuc Bay (English Channel, France). This stock shows important fluctuations in recruitment. The use of traditional models for fish population dynamics based upon an equilibrium state were inadéquate. This model includes three independent variables: spawning biomass, effects of fishing effort on the unexploited year classes, and temperature. Correlations between these expressions of independent parameters and recruitment are systematically analysed. The choice of the final model relies on minimization of the total variance unexplained portion. Introduction of fishing pattern into the model is realized by testing fishing effort effects upon two...
Tipo: Text
Palavras-chave: Recrutement; Modèle empirique; Pecten maximus; Température; Biomasse féconde; Effort de pêche; Recruitment; Empirical model; Pecten maximus; Temperature; Spawning biomass; Fishing effort.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00189/30069/28557.pdf

Feeding and energetics of the great scallop, Pecten maximus, through a DEB model
Provedor de dados: 5
Autores: Lavaud, Romain; Flye-sainte-marie, Jonathan; Jean, Fred; Emmery, Antoine; Strand, Oivind; Kooijman, Sebastiaan A. L. M.
We developed a full life-cycle bioenergetic model for the great scallop P. maximusrelying on the concepts of the Dynamic Energy Budget (DEB) theory. The covariation method was implemented to estimate the parameters of a standard DEB model. Such models are able to predict various metabolic processes from a food availability marker and temperature in the environment. However, suspension-feeders are likely to feed on various trophic sources, from microalgae cells to detritus. They are also able to sort and select food particles very efficiently, depending on their size, energetic value or quality. The present model includes a mechanistic description of the feeding processes, based on Kooijman’s Synthesizing Unit principle which allow to deal with several food...
Tipo: Text
Palavras-chave: Pecten maximus; DEB theory; Synthesizing Units; Phytoplankton; Feeding process; Bay of Brest.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00162/27316/28458.pdf

A coupled biophysical model for the distribution of the great scallop Pecten maximus in the English Channel
Provedor de dados: 5
Autores: Le Goff, Clement; Lavaud, Romain; Cugier, Philippe; Jean, Fred; Flye-sainte-marie, Jonathan; Foucher, Eric; Desroy, Nicolas; Fifas, Spyros; Foveau, Aurelie.
In this paper we used a modelling approach integrating both physical and biological constraints to understand the biogeographical distribution of the great scallop Pecten maximus in the English Channel during its whole life cycle. A 3D bio-hydrodynamical model (ECO-MARS3D) providing environmental conditions was coupled to (i) a population dynamics model and (ii) an individual ecophysiological model (Dynamic Energy Budget model). We performed the coupling sequentially, which underlined the respective role of biological and physical factors in defining P. maximus distribution in the English Channel. Results show that larval dispersion by hydrodynamics explains most of the scallop distribution and enlighten the main known hotspots for the population,...
Tipo: Text
Palavras-chave: Population dynamic model; Ecophysiological model; English Channel; Pecten maximus; Spatial distribution.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00355/46642/46467.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

Pecten maximus
Provedor de dados: 23
Autores: Jones, D.
Scallop Pecten maximus encrusted with hydroids Virgularia mirabilis
Tipo: Image
Palavras-chave: Family Pectinidae (Bivalves); Pennatulacea (Sea pens); Pecten maximus; Virgularia mirabilis.
Ano: 2007
URL: http://archive.serpentproject.com/1866/

Scallop
Provedor de dados: 23
Feeding
Tipo: Video
Palavras-chave: Family Pectinidae (Bivalves); Pecten maximus.
Ano: 2003
URL: http://archive.serpentproject.com/876/

Scallop
Provedor de dados: 23
Resting on seafloor, closed with blue tentacles
Tipo: Image
Palavras-chave: Family Pectinidae (Bivalves); Pecten maximus.
Ano: 2007
URL: http://archive.serpentproject.com/103/

Scallop
Provedor de dados: 23
Tipo: Video
Palavras-chave: Family Pectinidae (Bivalves); Pecten maximus.
Ano: 2005
URL: http://archive.serpentproject.com/772/

Scallop
Provedor de dados: 23
Tipo: Video
Palavras-chave: Family Pectinidae (Bivalves); Pecten maximus.
Ano: 2003
URL: http://archive.serpentproject.com/873/