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| 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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| Moreau, Jean. |
| In a preliminary work (MOREAU, 1967), the importance of the role of pigments in fattening ponds and the part they played in the process of Navicula ostrearia B.'s pigmentation had been studied in fattening ponds situated at two different points of the Marennes-Oléron basin. The first of these fattening ponds were located in the Seudre Valley, at La Tremblade and at Eguillate, the second ones in the Daire area more widely fed by coastal waters and where the greening conditions of the fattening ponds are different from those observed in Seudre (figure 1 and table 1). 370 Dosing the potency of various chlorophylls had highlighted a noticeable constancy of chlorophyll B and, a variance for those of type A and C (table 2) which had made it possible to conclude... |
| Tipo: Text |
Palavras-chave: Marennes Oléron; Navicula ostrearia; Pigment; Facteurs; Verdissement; Claire à huîtres. |
| Ano: 1968 |
URL: http://archimer.ifremer.fr/doc/1968/publication-2982.pdf |
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| Moreau, Jean. |
| The greening of oysters in fattening ponds, known of since SPRAT (1669), was made clear by GAILLON (1820) who described "the green coloration that oysters placed in basins acquired" and observed that this coloration was localised particularly in the gills. He specified the agent of this phenomenon, which he call Vibrio ostrearia, a spindle-shaped organism, about 100µ long, placed since then in the genus Navicula by BORV DE SAINT-VINCENT (1823). The pigment emitted by this navicular, classified today as one of the Pennales, was called "Marennine" in 1886 by RAY-LANCASTER. |
| Tipo: Text |
Palavras-chave: Marennes Oléron; Charente Maritime; Navicula ostrearia; Verdissement; Claire à huîtres. |
| Ano: 1967 |
URL: http://archimer.ifremer.fr/doc/1967/publication-2981.pdf |
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