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Décontamination expérimentale de bivalves toxiques : application aux phycotoxines paralysantes. Rapport final ArchiMer
Lassus, Patrick; Bardouil, Michele; Masselin, Pierre; Naviner, Magali; Truquet, Philippe.
A sea water recirculating flume was especially designed in the framework of this study. It improves physiological and ecophysiological evaluation of a 25 oysters (c. gigas) set fed on PSP toxic A. minutum cultures and then detoxified with commonly used aquaculture species (I. galbana, T. suecica, S. costatum, T. weissflogii). Chlorophyll a levels are kept steady in each case and adjusted in order to reach the same food value in each tank (0,5 mg/l TPM). When exposed to the mildly toxic species A. minutum (0,5 pg.eq.STX.cel-1) oysters depict a reduced clearance rate, food uptake and shell-valves activity (compared to non-toxic algal diets). The same physiological parameters do not show any significant differences when oysters are exposed to the control al...
Tipo: Text Palavras-chave: Épuration; Crassostrea gigas; Alexandrium minutum; PSP; Écophysiologie; Depuration; C. gigas; A. minutum; PSP; Ecophysiology.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00139/25021/23126.pdf
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Effet du CHANGEMENT GLOBAL sur la BIOLOGIE de l’huître creuse (C. gigas) dans le Bassin de Marennes-Oléron. Résultats, hypothèses et discussion ArchiMer
Soletchnik, Patrick; Polsenaere, Pierre; Le Moine, Olivier.
Historiquement, les pêches de larves de l’huître creuse (C. gigas) ont lieu en six stations du BMO depuis les années 70, de début juin à la première semaine de septembre. La comparaison des captures saisonnières et hebdomadaires entre les périodes P1 (1977-1991) et P2 (2000-2015) montre un ajustement de la distribution des captures de larves à un modèle polynomiale d’ordre 4 pour P1 (R2 = 0,77), puis d’ordre 2 pour P2 (R2 = 0,86). Les modèles de distribution des captures montrent que la saison de reproduction a doublé entre les deux périodes. Elle s’étend aujourd’hui de juin à septembre. Devant l’extension de la saison de reproduction, la saison de pêche expérimentale est aujourd’hui trop réduite. Toutefois, le pic d’abondance des captures n’a pas changé...
Tipo: Text Palavras-chave: Huître; C. gigas; Changement global; Réchauffement climatique; Reproduction; Larve; Mortalité; Phénologie; Ostréiculture; Bassin de Marennes Oléron; Phytoplancton; Chlorophylle a; Température.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00441/55239/56723.pdf
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Mise au point d'une stratégie de prégrossissement intensif en nourricerie de palourdes (R. philippinarum) et d'huîtres (c. gigas) dans la région de la baie de Bourgneuf ArchiMer
Baud, Jean-pierre.
Japanese clam and hollow oyster spats have been pre-grown under intensive conditions in hatcheries using underground seawater as thermal resource and as source of nutritional salts for forage seaweed production. The main parameters of this environment have been followed up and raising conditions have been controlled (spat density, seawater flow, phytoplankton concentration and temperature). The biological results obtained after interaction processing and the hierarchy of the studied parameters were the object of an economic analysis for each season, comparing different shellfish pre-growth strategies. This study finally allows us to be able to present pre-growth intensive methodology that can be passed on to the professional aquaculture industry.
Tipo: Text Palavras-chave: Intensive culture; Hatcherie; Pre growth; C. gigas; R. phiIippinarum; Bay of Bourgneuf; Culture intensive; Nourricerie; Prégrossissement; C. gigas; R. phiIippinarum; Baie de Bourgneuf.
Ano: 1988 URL: http://archimer.ifremer.fr/doc/1988/rapport-1593.pdf
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