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Études écophysiologiques sur Dinophysis et sa chaîne alimentaire, et effets in vitro du dinoflagellé et de ses toxines sur les premiers stades de vie de deux modèles d'animaux marins (l’huître et le poisson) ArchiMer
Gaillard, Sylvain.
Harmful algal blooms of Dinophysis are responsible for diarrheic shellfish poisoning in human consumers of contaminated mollusks after bioaccumulation of their toxins. Dinophysis is a mixotrophic organism, which sequesters chloroplasts from a unique prey Mesodinium rubrum to perform its own photosynthesis, itself mixotrophic and feeds a cryptophyte, Teleaulax amphioxeia. The relationship between these three organisms is fundamental to understand the distribution and bloom dynamics of Dinophysis. In a first study, the effects of temperature, irradiance and pH on physiological aspects of T. amphioxeia were determined using a full factorial design before assessing the effect of contrasting physiological states after acclimation to two light intensities of T....
Tipo: Text Palavras-chave: Changement global; Crassostrea gigas; Cyprinodon variegatus; Dinophysis; Efflorescences; Mesodinium; Pecténotoxines; Teleaulax; Toxines diarrhéiques; Crassostrea gigas; Cyprinodon variegatus; Diarrheic toxins; Dinophysis; Global change; Harmful algal blooms; Mesodinium; Pectenotoxins; Teleaulax.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00666/77807/79981.pdf
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Report on the first detection of pectenotoxin-2, spirolide-A and their derivatives in French shellfish ArchiMer
Amzil, Zouher; Sibat, Manoella; Royer, Florence; Masson, Nadine; Abadie, Eric.
In the context of the French Phytoplankton and Phycotoxins Monitoring Network (REPHY) programme, shellfish samples were harvested from different locations where harmful algae blooms were known to have occurred. For all shellfish samples found positive by the mouse bioassay for diarrhetic shellfish poisoning (DSP) toxins, liquid chromatography (LC) coupled with mass spectrometry (MS) was used to search for the following lipophilic toxins: okadaic acid (OA), dinophysistoxins (DTXs), pectenotoxins (PTXs), azaspiracids (AZAs), yessotoxins (YTXs), spirolides (SPXs) and gymnodimines (GYMs). In order to investigate the presence of acyl-OAs and/or acyl-DTX-1,-2 (DTX-3), alkaline hydrolysis was performed on all samples, and LC/ MS analyses were carried out on the...
Tipo: Text Palavras-chave: LC/MS analysis; Pectenotoxins; Spirolides; DSP toxins.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-6206.pdf
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