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Registros recuperados: 29
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Amélioration des productions phytoplanctoniques en écloserie de mollusques : caractérisation des microalgues fourrage ArchiMer
Robert, Rene; Chretiennot-dinet, Marie-josèphe; Kaas, Raymond; Martin-jezequel, Véronique; Moal, Jeanne; Le Coz, Jean-rene; Nicolas, Jean-louis; Bernard, Eudes; Connan, Jean-paul; Le Dean, Loic; Le Gourrierec, Gaetane; Leroy, Bertrand; Quere, Claudie.
in mollusc hatcheries. Consequently, we assessed themost commonly used species to establish their growth and size profiles, their cytomorphological, biochemical, biomolecular identification as well as their cytometer signs, and also their ability to grow under extreme conditions of temperature and salinity. This work aimed at matching the conformity of the strains used in Argenton (dispatched to most of the French commercial hatcheries) to those of a referenced culture collection. A previous screening preceded this study, because of the 45 species and/or clones held originally, Argenton kept no more than 15 species. As most of the latter are also represented in referenced collection, our strains are therefore correctly identified. On the other hand, the...
Tipo: Text Palavras-chave: Ecological limits; Biomolecular profile; Flow cytometry; Biochemical composition; Cytomorphology; Phytoplankton; Mollusc; Hatchery; Ecotolérance; Profil biomoléculaire; Cytométrie en flux; Composition biochimique; Cytomorphologie; Phytoplancton; Mollusques; Ecloserie.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/rapport-1546.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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Conséquences génétiques de la production de larves d'huîtres en écloserie : étude des processus de dérive et de sélection ArchiMer
Taris, Nicolas; Sauvage, Christopher; Batista, Frederico; Baron, Sophie; Ernande, Bruno; Haffray, Pierrick; Boudry, Pierre.
Previous studies have shown heritable variation in larval developmental traits in the Pacific oyster Crassostrea gigas. In order to study the genetic consequences of production of oyster larvae in hatcheries, two factors, specific to hatcheries, were examined: the effect of discarding the smallest larvae (i.e. culling) and the effect of temperature (20°C versus 26°C). A mixed-family approach was used in order to infer the genetic composition of larval populations and family assignment, limiting possible environmental bias and allowing the study of a relatively large number of families using a limited number of larval tanks. Our results show that three multiplexed highly polymorphic microsatellite markers are a powerful tool for family assignment and,...
Tipo: Text Palavras-chave: Hatchery; Genetic diversity; Selection domestication; Larvae; Crassostrea gigas; Ecloserie; Diversité génétique; Sélection domestication; Larve; Crassostrea gigas.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-1505.pdf
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Conséquences génétiques de la production intensive de larves d'huîtres en écloserie : étude des processus de dérive et de sélection liés aux pratiques d'élevage. ArchiMer
Taris, Nicolas.
In order to study the genetic influence of intensive production of the larval stage in commercial hatcheries, two types of specific selective processes were examined: the effects of discarding the smallest larvae and temperature. A mixed-family approach was used in order to infer the genetic composition of the larvae. The results show that our mixed-family approach, combined with microsatellite-based family assignment, is a powerful tool for the study of bivalve larvae genetics. Selective sieving is an advantageous practice at a phenotypic scale, but also represents a substantial risk for diversity loss. The culled larvae are important for the minimization of the variability in reproductive success and the maximization of broodstock genetic diversity....
Tipo: Text Palavras-chave: Hatchery; Oyster; Genetic diversity; Selection domestication; Larvae; Crassostrea gigas; Ecloserie; Huître; Diversité génétique; Sélection domestication; Larve; Crassostrea gigas.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/these-976.pdf
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Dix ans de production en ecloserie de mollusques bivalves ArchiMer
Leborgne, Y.
SATMAR has developed techniques and methods allowing a production of over 100 million spat per year at a size from 2 to 10 millimetres. Among the 13 species concerned by this production, 3 of major importance are the oysters Crassostrea gigas, Ostrea edulis and the Japanese little neck clam, Ruditapes philippinarum . The hatchery production could easily be doubled if the market would increase. Current research tend to increase the quality of the products by means of genetics and to lower the costs by improving the nursery phase.
Tipo: Text Palavras-chave: Ruditapes philippinarum; Ostrea edulis; Crassostrea gigas; Bivalvia; Costs; Marine aquaculture; Economics; Hatcheries; Aquaculture enterprises; Ecloserie; Production commerciale; Mollusques bivalves.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1184.pdf
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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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Etude de la qualité des eaux d'alimentation de l'écloserie de la Ferme Marine de Douhet (FMD), pour une amélioration de la survie larvaire de la daurade royale (Sparus aurata) ArchiMer
Hussenot, Jerome; Mornet, Francoise; Le Moine, Olivier; Geairon, Philippe; Guesdon, Stephane.
This study aimed to analyse the quality of the sea water flowing into the marine farm of Douhet, a gilthead bream hatchery, from the marsh-seawater reservoir to the entrance of the hatchery. The basin-seawater reservoir is not stratified in the pumping area. As a consequence, the measurements carried out at the surface to the right of the pumping dock give a good evaluation of the quality of the seawater pumped in depth. The high sensitivity of gilthead bream larvae to the water PH during the first two weeks of their larval life, and the values measured in the circuit seem to be an explanatory parameter to the observed mortalities. The water flowing into the hatchery retains, after pre-treatment, a nycthemeral PH variability, with maxima, at the end of the...
Tipo: Text Palavras-chave: Ammonia nitrogen; PH; Sea bream; Fish hatchery; Reservoir; Water quality; Azote ammoniacal; PH; Daurade royale; Ecloserie; Réserve; Qualité des eaux.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/rapport-6497.PDF
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Etude des processus de dérive et de sélection liés aux pratiques d'élevage en écloserie d'huître creuse ArchiMer
Boudry, Pierre.
Genetic consequences of production of Pacific oyster larval in hatchery: drift and selective pressures related to rearing practices. In order to study the genetic consequences of production of oyster larvae in hatcheries, two factors were examined: the effects of discarding the smallest larvae (i.e. culling) and temperature effects. A mixed-family approach was used in order to infer the genetic composition of the larval population. The results show that high polymorphic microsatellite-based family assignment is a powerful tool for the study of bivalve larvae genetics. Culling by selective sieving is an advantageous practice at a phenotypic scale, but also represents a substantial risk for diversity loss if parentage assignment is not introduced as a...
Tipo: Text Palavras-chave: Hatchery; Genetic diversity; Selection domestication; Larvae; Crassostrea gigas; Ecloserie; Diversité génétique; Sélection domestication; Larve; Crassostrea gigas.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/rapport-1459.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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Exigences réglementaires et recommandations concernant le traitement de l'eau vis-à-vis des agents pathogènes en entrée et en sortie d'écloseries conchylicoles ArchiMer
Bonvarlet, Florence.
Ce document présente les exigences réglementaires et recommandations relatives aux différents traitement de l'eau en entrée et en sortie d'écloseries conchylicoles. Afin de respecter cette réglementation des solutions, des méthodes de traitement y sont mentionnées.
Tipo: Text Palavras-chave: Réglementation; Ecloserie; Traitement eau; Pathogènes; Recommandation.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00041/15204/12531.pdf
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Expérience de repeuplement des fonds à partir de produits d'écloserie ArchiMer
Audouin, Jacques; De Kergariou, Gabriel.
Over the last decades, the fishing effort focused on crustaceans and especially on the lobster has continued to increase. This way, the number of pots used by each boat has grown from a few dozen to several hundred. This process lead to an overexploitation of the seabed and the catches do not go over 400 tonnes/years despite the increase of the means involved. Consequently, it has been necessary to implement a number of new measures to protect the lobster stock, and some restricted areas have been created off the French coasts.
Tipo: Text Palavras-chave: Homard; Crustacés; Ecloserie; Reproduction; Repeuplement.
Ano: 1977 URL: http://archimer.ifremer.fr/doc/1977/acte-6578.PDF
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Journées conchylicoles 1997 Ifremer Nantes les 18 et 19 mars 1997 ArchiMer
IFREMER.
Ce rapport synthétise les communications faites lors des "Journées conchylicoles", sur les travaux scientifiques de l'Ifremer en soutien aux activités conchylicoles
Tipo: Text Palavras-chave: Immunité; Ecloserie; Génétique; Pathologie; Ecophysiologie; Système d'élevage; Claires ostréicoles.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00200/31113/29524.pdf
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Journées conchylicoles 1999 Ifremer Nantes les 24 et 25 mars ArchiMer
Mazurie, Joseph; Lassalle, Elisabeth.
Ce rapport synthétise les communications présentées lors des "journées conchylicoles" sur les travaux scientifiques de l'Ifremer en soutien aux activités conchylicoles.
Tipo: Text Palavras-chave: Pathologie; Mortalité; Immunologie; Ecloserie; Génétique; Ecophysiologie; Elevages; Conchyliculture.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00200/31112/29523.pdf
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La reproduction des mollusques bivalves en écloserie ArchiMer
Devauchelle, Nicole.
Optimal gametogenesis and egg-laying environment, fertility, number of egg-layings, reproductor ageing, relationship between parent characteristics and conditioning and farming success, are the main issues considered by bivalve hatcheries each time the reproduction of a species is taken care of. Even if there is still very little bibliographic data on this precise field, reproduction mechanisms have been studied for decades in Mytilidae and Ostreidae. Largely cultivated in open sea, they are indeed an experimental material of choice. In this paper, we will see how the acquired knowledge and the methods developed on this material can be used to carry out a study on bivalve reproduction in hatcheries.
Tipo: Text Palavras-chave: Ecloserie; Reproduction; Mollusque; Ostreidae; Mytilidae.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/acte-6196.PDF
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L'élevage larvaire de crevettes en Nouvelle-Calédonie. L'Oxytétracycline et l'association Triméthoprime - Sulfadiazine en tant qu'alternatives à l'emploi de l'Erythromycine en écloserie ArchiMer
Francois, Cyrille.
Aquaculture of penaeid shrimps holds a major place in productions of animals. New Caledonia takes part to these productions by developing the breeding of Pacific blue shrimp Litopenaeus stylirostris. Nowadays, penaeid larviculture can’t be undertaken unless antibiotics are used. Experiments in the Caledonian Aquacultural Laboratory (LAC IFREMER Saint-Vincent) put across to the development of two antibiotic prophylaxis plans for substitution of erythromycine, one plan with oxytetracycline (hydrochloride), the other plan with trimethoprime-sulfadiazine association. After an antimicrobial agent susceptibility testing of bacteria and an acute toxicity study, efficacity assays are the biological validation of these projects of protocols
Tipo: Text Palavras-chave: Crevette; Ecloserie; Oxytétracycline; Triméthoprime; Sulfadiazine; Shrimp; Hatchery; Oxytetracycline; Trimetroprime; Sulfadiazine.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/00072/18312/15877.pdf
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Les variations de la fécondité de la coquille Saint-Jacques de la Rade de Brest en écloserie au cours du cycle annuel ArchiMer
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
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Microalgues et nutrition larvaire en écloserie de mollusques ArchiMer
Robert, Rene; Trintignac, Pascal.
The production of live microalgae remains the only reliable technique for feeding bivalve mollusc larvae in a controlled environment. However, these algae must answer a number of size, nutritive value and mass-production criteria. The current knowledge in this field is assessed in this work which will lead us to the conclusion that only a few species meet these requirements.
Tipo: Text Palavras-chave: Algues fourrage; Mollusque; Ecloserie; Microalgue; Nutrition; Elevage larvaire.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/1997/publication-6197.PDF
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Mission du 13-05 au 07-06-90 à l'écloserie Sodacal - Utilisation des AQUA-PLAKr en écloserie industrielle. Rapport final ArchiMer
Haffner, Philippe.
La mission effectuée du 13 mai au 7 juin 90 à l'écloserie de la ferme Sodacal en Nouvelle-Calédonie avait pour but de tester les aqua-plakR pour les comptages bactériens en routine dans une écloserie industrielle. La technique classique (comptage sur boite de Pétri) est en effet très peu utilisée par les éleveurs du fait de sa lourdeur alors qu'une bonne connaissance de l'évolution de la flore bactérienne dans les bacs d'élevages peut s'avérer nécessaire pour assurer une gestion sanitaire correcte de ces élevages. D'autre part, une collection la plus large possible des différentes souches bactériennes rencontrées a été réalisée. Le présent rapport n'aborde que l'aspect utilisation des aqua-plakR, les souches bactériennes étant actuellement en cours...
Tipo: Text Palavras-chave: Ecloserie; Aqua-PlakR; Comptage bactérien; Nouvelle Calédonie.
Ano: 1990 URL: http://archimer.ifremer.fr/doc/00131/24191/22185.pdf
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Module Argenton : écloserie - nursery. Bilan 1976 ArchiMer
Flassch, Jean-pierre; Aveline, Charles.
Les travaux commencés en 1973 avec la collaboration de Y. Koike sur la production artificielle d'Haliotis tuberculata devaient définir les aspects scientifiques et technologiques liés à l'obtention de juvéniles d'un an, non pas dans un but de repeuplement comme dans le contexte japonais, mais de promotion d'un élevage contrôlé en milieu naturel dans la zone de battement de marées. La volonté d'un contrôle systématique des élevages, d'une part, et l'utilisation éventuelle d'algues macrophytes, d'autre part, grâce aux immenses possibilités de production naturelle d'algues macrophytes dans la zone de battement des marées ont été les deux moteurs de l'orientation suivie dans le cadre de ce programme ormeaux. Les résultats obtenus depuis 1973 en laboratoire au...
Tipo: Text Palavras-chave: Ecloserie; Elevage; Production; Installation; Techniques; Fécondation artificielle; Haliotis tuberculata.
Ano: 1976 URL: http://archimer.ifremer.fr/doc/00134/24522/22551.pdf
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Production artificielle de naissain de coquilles Saint-Jacques Pecten maximus (L.) : Analyse des facteurs affectant la croissance larvaire ArchiMer
Cochard, Jean-claude; Gerard, Andre.
The analysis of the Pecten maximus larval productions carried out between 1982 and 1986 in the framework of the repopulating program of the roadsted of Brest demonstrated the existence of a number of factors affecting larval growth in hatcheries: - Larval growth shows important seasonal fluctuations. It is minimal in February-March (3 to 4 µm.D-1) and maximal in June (6 to 8 µm.D-1). The growth of larvae from conditioned spawners does not differ from that of larvae from mature genitors collected in their natural habitat. Growth is favoured by an unknown factor present in sea water and held with a filtration of 0,2 µm. - The growth of the larvae cultivated in slack water in flat bottom ponds is higher than that of the larvae cultivated in bubbling water in...
Tipo: Text Palavras-chave: Larve; Ecloserie; Croissance organisme; Coquille Saint Jacques; Pecten maximus L.; Production.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/acte-6534.pdf
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