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Amelioration de la forme et de la qualite de l'huitre Crassostrea gigas Thunberg dans les claires de Marennes-Oleron. ArchiMer
Deslous-paoli, Jean-marc; Zanette, Yvan; Heral, Maurice; Masse, Henri; Garnier, Jacqueline.
The breeding of Pacific oysters Crassostra gigas, in non tidal ponds, before commercialization, brings about an improvement of the shell and of the quantity and quality of the tissues. In fact, the Berthome's indice (1978) moves from 1.36 in June to 0.68 December, and the density of the shell increases in the same time from 1.79 to 1.98. On the other hand, the percentage of tissues in the oyster is 12.4% at the end of gametogenesis and more than 9% at the end of breeding. The dry tissues are composed of 10.3 of ash, 40.3% of proteins, 12.6% of lipids and 9% of carbohydrate. 95% of the carbohydrate are glycogen. The resulting energetic values are measured to 5.10 cal-mg super(-1) of dry tissues ash free.
Tipo: Text Palavras-chave: Crassostrea gigas; Tissues; Biochemical composition; Shells; Growth; Oyster culture.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/1981/publication-1892.pdf
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Contribution à l'étude de la biologie des claires du bassin de Marenens-Oléron ArchiMer
Zanette, Yvan.
Le verdissement constitue le label de qualité des huîtres produites et affinées dans les claires de MARENNES-OLERON . Mais le phénomène se raréfiant depuis plusieurs années, la Section Régionale du C.I.C. de MARENNES- OLERON, grâce à une subvention du Conseil Général de la Charente Maritime a pu financer cette étude. La production d'huîtres vertes est liée à la multiplication dans les claires d'une diatomée: Navicula ostrearia. Celle-ci présente la particularité lorsqu'elle dégénère de se pigmenter. Ce pigment bleu appelé Marennine diffuse dans l'eau et est fixé au niveau des branchies et des palpes labiaux des huîtres...
Tipo: Text
Ano: 1980 URL: http://archimer.ifremer.fr/doc/00442/55364/56880.pdf
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Elevage de palourdes sous filet en mileu fermé ArchiMer
Peyre, Roger; Zanette, Yvan; Heral, Maurice.
Japanese clam (Ruditapes philippinarum) and European clam (Ruditapes decussates) farming based on spat produced in hatcheries has gone beyond the experimental stage on the Atlantic coasts since the research of Latrouite et Claude (1976), Lucas (1977), Flassch (1979), Dréno (1979) and Gras (soon to be published). It has thus become necessary to develop farming procedures reliable enough to be handed over to the professionals in the business.
Tipo: Text Palavras-chave: Marennes Oléron; Ruditapes decussatus; Ruditapes philippinarum; Elevage; Palourdes.
Ano: 1980 URL: http://archimer.ifremer.fr/doc/1980/publication-3006.pdf
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Essai d'acclimatation de Crassostrea virginica et performances biologiques comparées avec Crassostrea gigas (2ème partie) ArchiMer
Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Baud, Jean-pierre; Heurtebise, Serge; Nourry, Max; Renault, Tristan; Cochennec, Nathalie; Zanette, Yvan; Blachier, Philippe.
Deuxième volet du programme d'essai d'acclimatation de l'huître américaine Crassostrea virginica, ce rapport présente les actions et les résultats de l'année 1993 qui a été consacrée au suivi des performances comparées de croissance des populations de C. gigas et C. virginica produites en 1992, ceci en trois sites différents: • dans le bassin de Marennes-Oléron en claire et sur estran, à la station IFREMER de Bouin en élevage intensif, au CREAA sur l'Ile d'Oléron en marais extensif. Au terme de cette seconde année d'étude, il est d'ores et déjà possible d'affirmer que que la souche anglaise de C. virginica étudiée ne présente pas de caractéristiques de croissance susceptibles de la rendre compétitive par rapport au témoin Crassostrea gigas et cela d'autant...
Tipo: Text Palavras-chave: Mollusques; Acclimatation; Crassostrea virginica; Crassostrea gigas; Génétique; Pathologie.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00077/18846/16419.pdf
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Etude préliminaire de l'impact des huîtres Crassostrea gigas (Thunberg) en élevage sur la biomasse des microorganismes des claires de Marennes-Oléron ArchiMer
Zanette, Yvan; Garnier, Jacqueline.
The evolution of microbial biomass based on chlorophyll a, pheopigments, proteins, particulate carbon and nitrogen, ATP and total viable aerobic bacterias measurements, is studied on three oyster ponds in relation with different densities of reared oysters Crassostrea gigas (Thunberg). Chlorophyll a important amounts characteristics of theses middles (13 to 100µg.1(1) are in part consumed when the density of oysters is important, comparatively ATP increase to 30µg.1(1). With important values of (ATP/carbon) 10(3) ratios, upper than 10, we could think that the development of large silicified phytoplanktonic species should be favoured by oysters particularly the diatom Navicula ostrearia (Bory)
Tipo: Text Palavras-chave: Navicula ostrearia; Marennes Oleron; Phytoplanctonic biomass; Microbial biomass; Oysters; Crassostrea gigas; Navicula ostrearia; Marennes Oléron; Claire; Biomasse microbienne; Biomasse phytoplanctonique; Huîtres; Crassostrea gigas.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/1981/acte-2936.pdf
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Intérêt du préélevage de l'huître Crassostrea gigas en claire ArchiMer
Zanette, Yvan; Deslous-paoli, Jean-marc.
Since the disappearance of Crassostrea angulata LMK during the epizootics of 1970-72, Crassostrea gigas Thunberg has been cultivated in the Marennes-Oléron basin. The latter, which could reach its commercial size at 18 months (His, 1978), no longer reaches it until 36 months. The harvesting of these oysters as well as their pre-fattening is currently done mainly in the estuaries of the Charente and the Seudre. The growth of C. gigas could be improved by separating the oysters from collectors sooner than usually done and fattening them sooner.
Tipo: Text Palavras-chave: Marennes Oléron; Claires ostréicoles; Elevage; Crassostrea gigas.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/publication-2954.pdf
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La matière organique particulaire dans les eaux du bassin de Marennes-Oléron et de ses marais adjacents (claires) : conséquences pour la nutrition de l'huître Crassostrea gigas ArchiMer
Heral, Maurice; Zanette, Yvan; Deslous-paoli, Jean-marc; Robert, Jean-michel; Razet, Daniel.
In 1979 and 1980, the characteristics of the particulate organic matter are defined fortnightly through seston analyses. It is very high in the basin and very low in the finishing ponds. The phytoplanktonic biomasses are maximal in May in the estuary, and in June-July in the finishing ponds, with chlorophyll contents 10 times higher than those monitored in the basin. Proteins are generally the main biochemical components found in both environments, with glucids accounting for 20 % and lipids for only 10 % of the biochemical components on average. The C/N ratios are almost constant in the finishing ponds with values around 5, typical of phytoplankton, whereas they are very high in the basin except in spring. In the same way, the protid/chlorophyll and the...
Tipo: Text Palavras-chave: Crassostrea gigas; Huîtres; Mollusques; Qualité eau; Seston; Matière organique; Claires ostréicoles; Bassin Marennes Oléron.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/1981/acte-6213.PDF
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Obtention de souches conchylicoles performantes par polyploïdisation (4ème partie) ArchiMer
Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Bodoy, Alain; Heurtebise, Serge; Garnier, Jacqueline; Baud, Jean-pierre; Nourry, Max; Haure, Joel; Martin, Anne-genevieve; Claude, Serge; Barret, Jean; Devauchelle, Nicole; Joly, Jean-pierre; Goulletquer, Philippe; Coatanea, Denis; Oheix, Jocelyne; Zanette, Yvan; Blachier, Philippe.
This fourth part of the polyploidisation program reports the experiments that were conducted in 1992 and that were devoted to : - the acquiring of a new method using an epifluroescent microscope - the development o a new technique for inducing polyploidy - the triploidy induction for the Europena clam Ruditapes decussatus - the settlement of performance controls conducted on diploid and triploid populations of Ostrea edulis - results of performance controls conducted on diploid and triploid populations of Crassostrea gigas and Ruditapes philippinarum
Tipo: Text Palavras-chave: Ruditapes decussatus; Ruditapes philippinarum; Ostrea edulis; Crassostra gigas; Cytongenetics; Polyploidy; Ruditapes decussatus; Ruditapes philippinarum; Ostrea edulis; Crassostrea gigas; Cytogénétique; Polyploïdie.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/1993/rapport-3859.PDF
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Prégrossissement et élevage de palourdes japonaise en marais : technique entre filet ArchiMer
Zanette, Yvan; Heral, Maurice; Peyre, Roger.
Another breeding technique was worked out for Japanese clam Ruditapes philippinarum. It consists in breeding it in a large two-fold net dipped into mud.
Tipo: Text Palavras-chave: Technique; Elevage; Ruditapes philippinarum.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/1981/acte-2942.pdf
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Production des micro-algues des claires ostréicoles en relation avec l'azote organique dissous excrété par les huîtres ArchiMer
Robert, Jean-michel; Maestrini, Serge; Heral, Maurice; Zanette, Yvan.
Estimations of algal growth potential (AGP) of oyster-pond waters have been made by the use of bioassays and nutrient analysis. Data obtained demonstrated that nitrogen is the nutrient Iimiting AGP and that an important part of algal biomass is supported by organic nutrients. Such an uptake ranges from 0.6 to 30.7 µg-at.I-1 nitrogen ; which represents up to six times the total amount of inorganic nitrogen taken up. U.V oxydation and subsequent chemical analysis shown DON concentrations in oyster-pond waters varied with oyster presence or absence: values recorded were 10-40 µg-at N.I-1 when oysters were not present, and up to 50-60 µg-at N.I-1 when oysters were covering the bottom of the pond. The oyster Crassostrea gigas was demonstrated to excrete 77-93 %...
Tipo: Text Palavras-chave: Photoheterotrophy; Excretion by oysters; Dissolved organic nitrogen; Yield index; Oyster pond; Photohétérotrophie; Excrétion de l'huître; Azote organique dissous; Indice de fertilité; Claire à huîtres.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/1981/acte-2946.pdf
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