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A physiological and biochemical approach to selecting the ideal diet for Ostrea edulis (L.) broodstock conditioning (part A) ArchiMer
Gonzalez-araya, Ricardo; Queau, Isabelle; Quere, Claudie; Moal, Jeanne; Robert, Rene.
To select the best microalgae for Ostrea edulis conditioning, four single species diets were fed to batches of broodstock, which were then compared using physiological and biochemical approaches. Ingestion and absorption were first studied, showing that Chaetoceros gracilis and Skeletonema marinoï were efficiently ingested (4.9–5.3 mg g−1 h−1) and absorbed (1.9–2.5 mg g−1 h−1) while Tetraselmis suecica led to the lowest physiological responses (0.36 and 0.12 mg g−1 h−1 respectively). When O. edulis were fed any microalgae except T-ISO with only 79 mg g−1, gonads accumulated carbohydrates from 116 to 141 mg g−1 and the extent of accumulation depended on the species supplied in the order T. suecica<C. gracilis<S. marinoï. When oysters were fed either...
Tipo: Text Palavras-chave: Ostrea edulis; Conditioning; Algal diets; Ingestion; Absorption; Biochemical composition.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00033/14449/11748.pdf
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Larval development and fatty acid composition of Ostrea edulis (L.) fed four different single diets from conditioning to pre-settlement ArchiMer
Gonzalez-araya, Ricardo; Robert, Rene.
Survival, growth and fatty acid composition of Ostrea edulis larvae (L.) fed four different single species, microalgal diets, Tisochrysis lutea (T), Chaetoceros neogracile (Cg), Skeletonema marinoi (Sm) or Tetraselmis suecica (Ts) from broodstock to pre-settlement, were studied. Lower larval growth (5.5m to 6.5m/d) was recorded in progeny continuously fed single S.marinoi or T.suecica, whereas good growth was achieved with single T.lutea (7.8m/d). Larvae, originated from broodstock receiving Sm or Ts, exhibited growth compensation when fed a bispecific balanced diet (TCg). This did not occur when broodstock and larvae were fed Cg or T, for which single or mixed diets led to similar larval growth. Furthermore, survival was high (>90%) regardless of...
Tipo: Text Palavras-chave: Broodstock conditioning; Diet; Larval development; Ostrea edulis.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00438/54986/56483.pdf
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The selection of an ideal diet for Ostrea edulis (L.) broodstock conditioning (part B) ArchiMer
Gonzalez-araya, Ricardo; Lebrun, Luc; Quere, Claudie; Robert, Rene.
Four microalgae species (Rhodomonas salina, Thalassiosira weissflogii, Thalassiosira pseudonana and Pavlova lutheri) were evaluated to estimate their potential as food for Ostrea edulis (L.) reproductive conditioning. Best ingestion and absorption were observed with R. salina (3.44 and 1.59 mg g− 1 h− 1, respectively), followed by T. pseudonana (2.75 and 0.98 mg g− 1 h− 1) and P. lutheri (2.40 and 0.91 mg g− 1 h− 1). Oysters fed T. weissflogii exhibited the lowest ingestion and absorption values (1.40 and 0.68 mg g− 1 h− 1). Proximate composition (proteins and carbohydrates) and lipid content (fatty acids and sterols) analysed in four main tissues (gonad, digestive gland, muscle and gills) also differed significantly with diet. Protein ranged from 355 mg...
Tipo: Text Palavras-chave: Ostrea edulis; Conditioning; Algal diets; Ingestion; Absorption; Biochemical composition.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00090/20092/17731.pdf
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