title: Influence of Crassostrea gigas (Thunberg) sexual maturation stage and ploidy on uptake of paralytic phycotoxins.
abstract: The purpose of this study was to assess paralytic phycotoxin uptake in diploid and triploid oysters at two stages of their sexual cycle corresponding to their status in early summer (June) and winter (November). Samples of diploid and triploid oysters were exposed to a toxic culture of Alexandrium minutum for 4 days in each season. No significant differences in filtration or clearance rates were observed during either November or June experiments. When diploid oysters were at resting stage (November), toxin uptake showed no significant difference between the ploidy classes. In contrast, when the diploid oysters were at the peak of their sexual maturation (June), the triploid oysters were seen to accumulate almost double the amount of paralytic toxins as the diploid ones.
authors.affiliation: Microbiologie d'Intérêt Laitier et Alimentaire EA 3214, Université de Caen, Esplanade de la Paix, BP 5183, 14032 Caen, France.
authors.forename: Marielle
authors.initials: M
authors.lastname: Guéguen
authors.forename: Régis
authors.initials: R
authors.lastname: Baron
authors.forename: Michèle
authors.initials: M
authors.lastname: Bardouil
authors.forename: Hansy
authors.initials: H
authors.lastname: Haberkorn
authors.forename: Philippe
authors.initials: P
authors.lastname: Soudant
authors.forename: Philippe
authors.initials: P
authors.lastname: Truquet
authors.forename: Patrick
authors.initials: P
authors.lastname: Lassus
mesh_terms: D000818:Animals; D049896:Crassostrea / Q000235:genetics / Q000254:growth & development*; D008387:Marine Toxins / Q000378:metabolism*; D011003:Ploidies; D012741:Sexual Maturation
chemical_list: D008387:Marine Toxins