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| Registros recuperados: 30 | |
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| Soletchnik, Patrick; Razet, Daniel; Geairon, Philippe; Faury, Nicole; Goulletquer, Philippe. |
| The study of sexual maturation and spawning in the Pacific oyster (Crassostrea gigas) is part of a vast research programme that endeavours to understand the causes of mortality that occur sporadically during the spring and summer seasons in the Marennes-Oléron Bay. Thermal and diet conditioning were used to obtain oysters at each stage of maturity simultaneously. Using the measured rates of clearance, consumption, absorption and respiration provided estimates of growth potential and gave the energetic budget of oysters at different stages of sexual maturity. Physiological responses were similar for males and females. Filtration decreased from 2.4 to 2.6 l.h (-1) to 1.8 l.h (-1) with increasing maturity. Weight gain was associated with gonad development and... |
| Tipo: Text |
Palavras-chave: Ponte; Maturation; Crassostrea gigas; Ecophysiologie. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/1997/acte-3251.pdf |
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| Rohmer, Véronique. |
| Afin d'évaluer les effets d'une contamination expérimentale par des microalgues toxiques sur la filtration,· des bivalves (Pecten maximus, Crassostrea gigas et Mytilus edulis) ont été alimentés pendant quelques heures avec différents régimes : des cultures très toxiques (Alexandrium tamarense, souche japonaise), moyennement toxique (A. minutum, souche française) et non toxique (A. tamarense, souche anglaise) de dinoflagellés, et une culture non toxique témoin d'une chlorophycée : Tetraselmis suesica. Les différents essais réalisés montrent que l'utilisation de rouge neutre ne permet pas de comparer les activités valvaires dans les conditions expérimentales. L'enregistrement direct de l'activité valvaire est intéressant mais difficilement reproductible dans... |
| Tipo: Text |
Palavras-chave: Pecten maximus; Mytilus edulis; Crassostrea gigas; Ecophysiologie; Microalgues toxiques; Paralytic Shellfish Poison. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00429/54043/55314.pdf |
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| Bardouil, Michele; Bohec, Madeleine; Bougrier, Serge; Lassus, Patrick; Truquet, Philippe. |
| An experimental flow-through system allowing determination of the feeding behaviour of individual molluscs was used to study oysters exposed to mixed diets composed of varying proportions of the diatom Thalassiosira weissflogii and two strains (toxic and nontoxic) of the dinoflagellate Alexandrium larnarense. Our results show that, when compared to a T. weissflogii unialgal diet, even a diatomltoxic dinoflagellate ratio as low in biomass as 90/10 reduced clearance rates and biodeposit production by oysters. Consumption was slightly but significantly decreased for a 50/50 diatomltoxic dinoflagellate mixture. For the toxic dinoflagellate unialgal diet, ingestion, absorption and consumption were completely inhibited. Thus, the inclusion of low amounts of... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Thalassiosira weissflogii; Alexandrium tamarense; Ecophysiologie; Toxine paralysante des coquillages; Crassostrea gigas; Thalassiosira weissflogii; Alexandrium tamarense; Ecophysiology; Paralytic shellfish poison. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00017/12788/9729.pdf |
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| Registros recuperados: 30 | |
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