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Essai de mise en évidence in situ de paramètres biotiques et abiotiques de l'eau et de l'interface eau-sédiment intervenant dans la production de l'huître creuse Crassostrea gigas ArchiMer
Heral, Maurice; Deslous-paoli, Jean-marc; Razet, Daniel; Prou, Jean.
The flesh production of oysters is mainly related to concentrations of dissolved carbon and free amino acids. The younger oysters are dependent on concentrations of pheopigments while the production of the older ones is related to chlorophyll a values of the water-sediment interface. Shell production depends mainly on temperature, but also on the amount of food available: concentrations of dissolved carbon for the younger oysters and values in chlorophyll a of the interface for the older ones.
Tipo: Text Palavras-chave: Dissolved matter; Pheopigments; Chlorophyll; Marenne Oleron estuary; Crassostrea gigas; Trophic relations; Substances dissoutes; Phéopigments; Chlorophylle a; Estuaire de Marennes Oléron; Crassostrea gigas; Relations trophiques.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/publication-2932.pdf
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Transferts énergétiques entre l'huître Crassostrea gigas de 1 an et la nourriture potentielle disponible dans l'eau d'un bassin ostréicole ArchiMer
Deslous-paoli, Jean-marc; Heral, Maurice.
A paraIleI study of the available energy in the water and of the energy balance of one year old Crassostrea gigas has been made in Marennes-Oleron. Also, from the 32.95 \06 Kcal/m2 that goes through a waterspout of 0,1 m (5.96 \06 Kcal/m2 from phytoplancton, and 64.1 102 Kcal/m2 for the bacteria), an average of 0.19 70 is used by the oyster population. 5 343 Kcal of that annual consummate energy (20 383 Kcal) are assimilated, and 15 035 Kcal (73.8 70) are rejected as feces pseudofeces. From the assimilated energy, 4 317 Kcal (80.8 %) was available for the metabolism and 19.2 % for production of tissue (567 Kcal), shell (281 Kcal) and gametes (182 Kcal). However in the winter the production efficiency are negative ant it is considered that the overload in...
Tipo: Text Palavras-chave: Marennes Oleron estuary; Crassostra gigas; One year old; Energetic flow; Estuaire de Marennes Oléron; Crassostrea gigas de 1 an; Transfert énergétique.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/publication-2930.pdf
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