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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 ArchiMer
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
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A coupled biophysical model for the distribution of the great scallop Pecten maximus in the English Channel ArchiMer
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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Bivalve hatchery technology: The current situation for the Pacific oyster Crassostrea gigas and the scallop Pecten maximus in France ArchiMer
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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Caracteristiques ultrastructurales du spermatozoide de la coquille Saint-Jacques, Pecten maximus (Mollusque, Bivalve) ArchiMer
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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Collecte de naissain de pectinidés en Bretagne ArchiMer
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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Cycles saisonniers, reproduction et qualite des ovocytes chez Pecten maximus en rade de Brest ArchiMer
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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Ecophysiologie de coquillages contaminés par des microalgues toxiques : premiers essais ArchiMer
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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Effect of sampling location, release technique and time after activation on the movement characteristics of scallop (Pecten maximus) sperm ArchiMer
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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Effect of shear velocity and flow regimes on scallop post-larval detachment feed on two different diets ArchiMer
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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Effect of the probiotic strain Phaeobacter gallaeciensis after bacterial challenge on the complete larval development of Pecten maximus ArchiMer
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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Effects of bioactive extracellular compounds and paralytic shellfish toxins produced by Alexandrium minutum on growth and behaviour of juvenile great scallops Pecten maximus ArchiMer
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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Effects of hydrodynamic factors on Pecten maximus larval development ArchiMer
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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Effet de la qualité de l'eau sur la croissance larvaire de Pecten maximus en écloserie : observations préliminaires ArchiMer
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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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 ArchiMer
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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Etude experimentale de la maturation ovocytaire chez Pecten maximus et Crassostrea gigas (Mollusca, Bivalvia) ArchiMer
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
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Etudes sur les mortalites larvaires de la coquille st Jacques Pecten maximus en ecloserie ArchiMer
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
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Evaluation du stock de coquilles Saint-Jacques de la Baie de Seine et du Proche Extérieur. COMOR 32 (8-23 juillet 2002) ArchiMer
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
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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). ArchiMer
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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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). ArchiMer
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
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Experimental shift in diet Delta13C: A potential tool for ecophysiological studies in marine bivalves ArchiMer
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
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