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Registros recuperados: 56
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A methology for the stocks assessments of cultivated oysters among along the French Atlantic coasts ArchiMer
Bacher, Cedric; Baud, Jean-pierre; Bodoy, Alain; Deslous-paoli, Jean-marc; Dreno, Jean-paul; Heral, Maurice; Maurer, Daniele; Prou, Jean.
An assessment of the reared stocks of the Pacific oyster (Crassostrea gigas ) has been recently conducted on the major French areas of molluscs culture. The methodology proposed included both estimates of densities obtained by subsampling in the field, and aerial photographs which covered the cultivated, intertidal area. The size and the number of samples were designed to reach a precision of 10% on the final assessment in each area. The field work consisted in weighing and counting the oyster in unit areas of 0.5 m2 for the bottom culture or in trays or bags, for the off bottom technique. These results give a better knowledge of the technique evolution and of the general structures in the cultivated areas.
Tipo: Text Palavras-chave: Modeling; Estimation; Stocks; Crassostrea gigas; Oysters.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/acte-2864.pdf
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Aménagement des marais atlantiques : nécessité d'une gestion de l'espace littoral ArchiMer
Bodoy, Alain; Dardignac, Marie-josée; Manaud, Francois; Masson, Daniel; Mauvais, Jean-louis; Thomas, Gerard.
Tipo: Text
Ano: 1989 URL: http://archimer.ifremer.fr/doc/00040/15126/12463.pdf
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Approche de l'état physiologique de l'huître creuse Crassostrea gigas au cours d'un cycle saisonnier à Marennes-Oléron ArchiMer
Moal, Jeanne; Samain, Jean-francois; Bodoy, Alain; Le Coz, Jean-rene.
The energy charge was measured for two Crassostrea gigas populations, during an annual survey at Marennes Oleron, to appreciate the condition of health of these oysters. It is assumed that the actual decrease in production of this area is related to a biomass overload which affects the oysters by lowering their scope for growth. Energy charge, an index developped by ATKINSON (1968), defines the energy equilibrium of organisms. It is the adenylic nucleotide ratio: E.C = (ATP + 1/2ADP)/ATP + ADP + AMP). We have measured this parameter to determine the state of health of these oysters. A methodological study has been conducted previously to define the conditions of sampling, conservation and extraction for a HPLC assay. The HPLC method (high performance...
Tipo: Text Palavras-chave: Marennes Oleron; Seasonal variations; Crassostrea gigas; Physiological indice; Nucleotides; Energy charge; Marennes Oléron; Cycle saisonnier; Crassostrea gigas; Indiced physiologique; Nucléotides; Charge énergétique.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/publication-2869.pdf
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Assessment of human impact on giant clams, Tridacna maxima, near Jeddah, Saudi Arabia ArchiMer
Bodoy, Alain.
Tipo: Text
Ano: 1984 URL: http://archimer.ifremer.fr/doc/00036/14766/12075.pdf
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Assessments of natural mortality of cultivated oysters (Crassostrea gigas) in the bay of Marennes-Oleron (France) ArchiMer
Bodoy, Alain.
The natural mortality of oysters could by considered, in a man controlled ecosystem, as the result of the action of biological factors, and human factors other then the harvest of the population. Such mortalities need to be estimated in order to be used in population dynamics, as a tool for management purposes. ln Marennes-Oleron bay, different ways of estimating the natural mortality are available. Several oyster farms were monitored for assessing growth, mortality and production in rearing conditions. Furthermore, an experimental framework which includes 15 stations gave an appraisal of the same factors under controlled conditions. Finally, another estimate will be soon available by comparin9 the number of recruited oysters, and the number of oyster...
Tipo: Text Palavras-chave: Marennes Oleron; Mortality; Crassostrea gigas; Oysters.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/acte-2962.pdf
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Bilan azoté des flux tidaux d'un marais salé à végétation halophyte ArchiMer
Silva, Celine; Raillard, Marieke; Bodoy, Alain; Hussenot, Jerome.
In spring 2001, during a complete tidal cycle, nitrogen fluxes between the sea and the salt marsh were calculated. The marsh (1198 m2) covered in 75 % by halophytes, with 46 % by the sea purslane, Halimione portulacoides. The nitrogen balance shows that the salt marsh imports nitrogen micro-particules (2,09 g) by sedimentation, exports dissolved nitrogen (4,13 g), and that the macro-element part (-1,02 g in fauna and vegetable refuse) in the global mass balance (3,06 g) is not unimportant. Nitrogen fluxes are mainly under inorganic form for the incoming flux (mainly NO3), and under organic form for the outgoing flux. The halophyte vegetation of this marsh seems to play thus a dominating role in the tidal nitrogen exchanges, by a mechanical action on the...
Tipo: Text Palavras-chave: Marais salé; Halophytes; Azote; Bilan de masse; Halimione portulacoides; Salicornes; Salt marsh; Halophytes; Nitrogen; Mass balance; Halimione portulacoides; Sea purslane; Sampshire.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/00045/15597/13000.pdf
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Biomasse et production primaire du phytoplancton et du microphytobenthos de deux biotopes sableux (Golfe de Fos, France) ArchiMer
Plante-cuny, Marie-reine; Bodoy, Alain.
The primary production (phytoplankton and microphytobenthos) of a coastaL shallow water ecosystem (0.5 m) was investigated in two sandy areas, differing by their wave exposure. The physical and chemical parameters, the functional chlorophyll and pheopigments as well as the primary production were measured monthly, throughout a two-year study. The bivalve Ruditapes decussatus was the dominant species in the sheltered station (RD), whereas Donax trlmcu/us inhabited the other station (DT) which was exposed to the open-sea waves. Microphytic biomasses were determined after extracting chlorophyll a and pheopigments in 90% acetone. by spectrophotometric measurements before and after acidification. Gross hourly primary production was estimated by measuring the...
Tipo: Text Palavras-chave: Biomasse; Production primaire; Phytoplancton; Microphytobenthos; Mediterranee; Biomass; Primary production; Phytoplancton; Microphytobenthos; Mediterranean.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/publication-2870.pdf
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Budget énergétique de l'huître perlière, Pinctada margaritifera, dans le lagon de Takapoto ArchiMer
Pouvreau, Stéphane; Tiapari, Jérôme; Gangnery, Aline; Garnier, M.; Lagarde, Franck; Robert, Stéphane; Jonquieres, Gerard; Teissier, Hinano; Prou, Jean; Bennett, Auguste; Caisey, Xavier; Haumani, Gaby; Buestel, Dominique; Bodoy, Alain.
Tipo: Text
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00041/15176/12513.pdf
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Comment poussent les nacres dans les lagons? ArchiMer
Bodoy, Alain.
Tipo: Text
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00041/15203/12530.pdf
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Comparaison de la respiration chez Ruditapes decussatus (L.) et R. philippinarum (Adams & Reeve) en fonction de la température ArchiMer
Bodoy, Alain; Riva, Alain; Maitre-allain, Thierry.
Measurements of oxygen consumption in the two species Ruditapes decussatus and Ruditapes phi/ippinarum were perfonned using hatchery-reared juveniles, grown under controlled conditions. The temperature range varied from 10 to 30°C. The linear relations between the logarithms of the dry weight and of the oxygen consumption were calculated for each species. Rates were compared in terms of standardized clam tissue weight calculated from the regression of respiration on tissue weight. Such a technique allows to make comparisons between the species by avoiding any interference from the variations in individual weight. Within this range of temperature, oxygen consumption of R. philippinarum and of R. decussatus exhibit the same variations, with a maximum at...
Tipo: Text Palavras-chave: Temperature; Oxygen consumption; Ruditapes philippinarum; Ruditapes decussatus; Température; Consommation oxygène; Ruditapes philippinarum; Ruditapes decussatus.
Ano: 1986 URL: http://archimer.ifremer.fr/doc/1986/publication-2963.pdf
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Comparison of events in the seasonal cycle for Donax vittatus and D. trunculus in european waters ArchiMer
Ansell, A. D.; Bodoy, Alain.
Tipo: Text
Ano: 1979 URL: http://archimer.ifremer.fr/doc/00036/14765/12074.pdf
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Compte-rendu d'activité 1990 de l'Unité de Recherche Régionale Aquacole (URRA) La Tremblade ArchiMer
Bodoy, Alain.
Rapport d'activité 1990 de l'Unité de Recherche Régionale Aquacole (URRA) La Tremblade
Tipo: Text Palavras-chave: Conchyliculture; Télécaptage; Gestion élevage; Biologie; Physiologie; Bivalves; Rapport activité.
Ano: 1990 URL: http://archimer.ifremer.fr/doc/00072/18284/15854.pdf
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Croissance comparée de la palourde européenne (Ruditapes decussatus) et de la palourde japonaise (Ruditapes philippinarum) dans un écosystème artificiel méditerranéen ArchiMer
Bodoy, Alain; Maitre-allain, Thierry; Riva, Alain.
Tipo: Text
Ano: 1980 URL: http://archimer.ifremer.fr/doc/00040/15127/12464.pdf
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Croissance saisonnière du bivalve Donax trunculus (L.) en Méditerranée nord occidentale (France) ArchiMer
Bodoy, Alain.
Tipo: Text
Ano: 1982 URL: http://archimer.ifremer.fr/doc/00036/14687/11992.pdf
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Development of culture techniques for new bivalve species ArchiMer
Bodoy, Alain; Mercer, J. P..
Were are two main reasons for the development of cultivation techniques of new bivalve species. First, the risk exists that traditionally reared species may be ereadicated or severely depleted by pathogenic agents. For example the Portuguese 0yster Crassostrea angulata. disapeared from the French coasts in the early 1970's and worldwide production of the flat oyster, Oslrea edulis has been dramatically reduced by the effects of Bonamia. Secondly, in some countries production may he self-Iimiting by the size and availabilily of national and international markets and a wider species range could offer some promising new economic opportunities for aquaculturists. In particular this applies to species where there are identifiable market shortfalls.
Tipo: Text Palavras-chave: Haliotis tuberculata; Ostrea edulis; Placopecten magellanicus; Scallops; Ruditapes philippinarum; Manila clam; Molluscs; Cultivation techniques.
Ano: 1990 URL: http://archimer.ifremer.fr/doc/1990/publication-3033.pdf
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Diversification des productions conchylicoles en Poitou-Charentes. L'élevage du pétoncle noir Chlamys Varia ArchiMer
Bodoy, Alain; Garnier, Julien; Heurtebise, Serge; Nollet, V.; Chagot, D..
La croissance et la reproduction du pétoncle noir, Chlamys varia, ont été suivies sur un cycle biologique complet, dans un marais maritime. Cette croissance s'est avérée être nettement plus rapide qu'en rade de Brest, puisque la taille commerciale de 35 mm a été atteinte en un an. Les individus se sont reproduits au bout de la même période. Ceci montre qu'il est possible d'obtenir un cycle biologique très rapide.
Tipo: Text
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00080/19152/16747.pdf
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Diversification des productions conchylicoles en Poitou-Charentes. L'élevage du pétoncle noir Chramys Varias ArchiMer
Bodoy, Alain; Garnier, Jacqueline; Heurtebise, Serge; Nollet, V.; Chagot, Dominique.
La croissance et la reproduction du pétoncle noir, Chlamys varia, ont été suivies sur un cycle biologique complet, dans un marais maritime. Cette croissance s'est avérée être nettement, plus rapide qu'en rade de Brest, puisque la taille commerciale de 35 mm a été atteinte en un an. Les individus se sont reproduits au bout de la même période. Ceci montre qu'il est possible d'obtenir un cycle biologique très rapide. Lors du cycle de production, des mortalités importantes ont été constatées entre le prégrossissement en nurserie et la mise en élevage. Ces mortalités ne se sont pas renouvelées sur le cycle en cours d'étude. Un agent parasite nouveau a été décrit sur cette espèce, sans que les certitudes puissent être établies quant à son rôle pathogène....
Tipo: Text Palavras-chave: Croissance; Composition biochimique; Elevage; Pétoncle; Marais maritime; Charente-Maritime.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00048/15905/13333.pdf
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Does the prevalence of Bonamia and Marteilia diseases be reduced on flat oysters (Ostrea edulis) of Atlantic and Mediterranean origin, when they are reared together with the Japanese oyster (Crassostrea gigas) in tidal ponds? ArchiMer
Bodoy, Alain; Bougrier, Serge; Geairon, Philippe; Garnier, Jacqueline; Boulo, Viviane; Heurtebise, Serge.
The flat oyster Ostrea edulis was originally reared in several regions of the European waters. The tidal saline ponds on the Atlantic coasts of France were highly productive before being hit by two consecutive epizooties. Parasitic diseases were described on this species, both of them leading 10 economic losses, as heavy mortalities have usually been recorded before the oysters reach the commercial size. Repeated experiments showed that the two diseases, Marteilia refringens and Bonamia ostreae are still active in this environment. Recently, some evidences were given that haemocytoblasts of Crassostrea gigas had the ability to lyze the Bonamia cells. Therefore, in an experiment of contiguous culture of the two species of oysters, the growth, mortality and...
Tipo: Text Palavras-chave: Molluscs; Mortalities; Growth; Pathology; Crassostra gigas; Ostrea edulis; Marteilia refringens; Bonamia ostreae.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/1991/acte-3049.pdf
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Environmental status of the european seas ArchiMer
Frid, Chris; Hammer, Cornelius; Law, Robin; Loeng, Harald; Pawlak, Janet F.; Reid, Philip C.; Tasker, Mark; Carlberg, Stig; Jakobsen, Tore Jakobsen; Rice, Jake Rice; Skjoldal, Hein Rune; Andrulewicz, Eugene; Bodoy, Alain; Calabrese, Anthony; Carlberg, Stig; Caspersen, Ove; Daan, Niels; Dahlin, Hans; Ehrich, Siegfried; Gentien, Patrick; Keizer, Paul; Leppänen, Juha-markku; Lima, Carmen; Margonski, Piotr; Noji, Tom; Nunes, Teresa; Rugg, Dornford; Sköld, Mattias.
Tipo: Text
Ano: 2003 URL: http://archimer.ifremer.fr/doc/00040/15135/12473.pdf
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Estimation des stocks d'huîtres cultivées dans le bassin de Marennes-Oléron en 1986 ArchiMer
Bodoy, Alain; Bacher, Cedric; Geairon, Philippe.
Une estimation du stock d' huîtres creuses en élevage dans le bassin de Marennes-Oléron a été effectuée en août 1986 . Le stock s'élevait alors à 90 000 tonnes, avec une précision de 8,4 %. Ce stock se répartit en 30 300 tonnes pour l'élevage à plat et 59 700 tonnes pour l'élevage en surélevé. Il s'est donc produit une augmentation des tonnages en élevage qui est de 9,4 % entre 1985 et 1986. L'augmentation de tonnage concerne surtout l 'élevage en surélevé, et plus particulièrement les huîtres fixées sur collecteurs. La séparation des classes d'âge au niveau des collecteurs a permis d'améliorer la précision des estimations. Elle a également permis de montrer l'importance de la classe d'âge de 1 an (16 900 tonnes), qui correspond au captage particulièrement...
Tipo: Text Palavras-chave: Ostréiculture; Stocks; Croissance; Production; Huîtres creuses.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/00048/15903/13331.pdf
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