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| Registros recuperados: 61 | |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 61 | |
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