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| Registros recuperados: 56 | |
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| 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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| Bodoy, Alain; Martin, Jean-louis; Bacher, Cedric; Haubois, Anne-gaelle; Sauriau, Pierre-guy. |
| 1.This report presents the results of a field study conducted in the ECASA test site nOS in the Pertuis Breton, France. The site is located on the Atlantic West coasts. It is open to the bay of Biscay, but is slightly protected against westerly winds. The bay has been exploited by intertidal mussels culture for centuries. 2. Within the bay, mussels (Mytilus edulis) are cultivated either by the traditional pole technique, around the bay or on longlines in the centre of the bay. The area occupied by these longline s represents 250 ha, and the resulting annual production is 1 000 tonnes of mussels. The average depth at mid tide is of 13.8 m. The sediment is sandy, with a small fraction of mud. 3. The site is subject to several regular monitoring through the... |
| Tipo: Text |
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| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/00304/41516/40724.pdf |
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| 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 |
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| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00040/15135/12473.pdf |
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| Bodoy, Alain; Garnier, Jacqueline; Razet, Daniel; Geairon, Philippe. |
| Mass mortalities of oysters were recorded in the South of the Bay of Marennes-Oleron, during spring 1988. The percentages of mortality averaged 50 % and reached up to 90 % in some areas of bottom culture. The losses were estimated to 7 800 tonnes. This paper present the results of the investigations carried out in several fields. Among them, pathological examination revealed that no pathogenic agent or parasitic infestation could be evoked to explain these mortalities. Analyses of pollutants were either negatives, or the concentrations were far below the toxicity levels. Climatological and hydrological observations showed that rainfalls were twice more abundant then the average, for a period of 6 months preceding the mortalities. The salinity was low and... |
| Tipo: Text |
Palavras-chave: Bay of Marennes Oleron; Crassostrea gigas; Oysters; Mortalities. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/1990/acte-3030.pdf |
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| 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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| 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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| Bodoy, Alain; Plante-cuny, Marie-reine. |
| On étudie un fond sablo-vaseux de mode calme à Ruditapes decussatus et un fond sableux de mode battu à Donax trunculus. Dans le premier cas, la biomasse chlorophyllienne totale est 10 fois plus élevée que dans le second, et la production primaire double; le rôle du microphytobenthos y est prépondérant (en biomasse, 97%; en production primaire 50%); en mode battu, le phytoplancton représente la quasi-totalité de l'échelon primaire. |
| Tipo: Text |
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| Ano: 1980 |
URL: http://archimer.ifremer.fr/doc/00036/14715/12021.pdf |
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| Leguerrier, D; Niquil, Nathalie; Petiau, A; Bodoy, Alain. |
| We used a carbon-based food web model to investigate the effects of oyster cultivation on the ecosystem of an intertidal mudflat. A previously published food web model of a mudflat in Marennes-Oleron Bay, France, was updated with revised parameters, and a realistic surface area and density of existing oyster cultures on the mudflat. We developed 2 hypothetical scenarios to estimate the impact of oyster cultivation on the food web structure of the ecosystem: one with no oysters, the other with a doubled area devoted to cultivated oysters in the bay. Oysters are direct trophic competitors of other filter feeders, and their presence modifies benthic-pelagic coupling by forcing a shift from pelagic consumers to benthic consumers. Increasing the surface area of... |
| Tipo: Text |
Palavras-chave: Carbon flux; Inverse analysis; Food web; Network analysis; Bivalve culture. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/00000/10816/7583.pdf |
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| Bodoy, Alain; Masse, H.. |
| Some parameters measuring the production of organic matter, in field conditions, by a population of the bivalve mollusc Donax trunculus have been studied. Those studies which are easily done when the population is composed of long lived species become difficult in Mediterranean Sea where the populations are instable and composed of short-lived species. A large qualitative sample has been made every month on which the interpretation of cohort succession has been done using the graphical method of CASSIE (1954) which is an useful mean to determine the modal class-size. The monthly values of the weight/size relationship, during a year, show important fluctuations indicating that size increment, tissue weight increment, gamet production and release are often... |
| Tipo: Text |
Palavras-chave: Production; Mollusques bivalves; Production; Molluscs bivalve. |
| Ano: 1979 |
URL: http://archimer.ifremer.fr/doc/00306/41696/40907.pdf |
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| Pouvreau, Stephane; Gangnery, Aline; Tiapari, Jerome; Lagarde, Franck; Garnier, Matthieu; Bodoy, Alain. |
| The gametogenic cycle and the reproductive effort of the blacklip pearl oyster, Pinctada margaritifera, cultivated in Takapoto lagoon were studied for a 1-year period (March 1997-April 1998) by bimonthly observations of gonadal sections, dry tissue weights and gonadal index in a population of pearl oyster composed of three age-groups. pearl oysters attained sexual maturity in the end of their first year (height approximate to 40 mm), implying that P. margaritifera is a late-maturing species in comparison with other Pteriidae. This species was also confirmed to be a marked protandrous successive hermaphrodite in culture, with 100 % of males at first maturity and 75 % in older pearl oyster (height > 120 mm). The general pattern of gametogenic activity,... |
| Tipo: Text |
Palavras-chave: French Polynesia; Reproductive effort; Reproductive cycle; Tropical aquaculture; Gametogenesis; Blacklip pearl oyster; Polynésie française; Effort de reproduction; Cycle de reproduction; Aquaculture tropicale; Gamétogenèse; Huître perlière. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/2000/publication-1391.pdf |
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| 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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| Registros recuperados: 56 | |
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