0 avis
Fast and slow depurators of amnesic shellfish toxin: a bioenergetic modelling approach to compare twopectinid species
Archive ouverte
Edité par CCSD -
International audience. Microalgae species of the genus Pseudo-nitzschia may produce toxic domoic acid and form blooms. Domoic acid, the amnesic shellfish toxin, is a threat for Humans, thus its concentration is monitored within exploited shellfish species. Indeed, by their active filtration, bivalves may accumulate toxins in their tissues. When the sanitary threshold is exceeded, fishing is closed until decontamination. In France, the king scallop (Pecten maximus) is thesecond most economically important bivalve species. Over the last decade, fishing closures have led to a decrease in the fishing fleet in the Bay of Brest and a significant economic loss. Not all bivalve species respond in the same way to contamination, there exist "slow" depurators, such as P. maximus, and "rapid" ones like Mimachlamys varia, the variegated scallop. The French MaSCoET project aims to understand the ecology of this microalgae and the contamination and decontamination kinetics of the king scallop compared to other bivalves. The objectives of my PhD thesis are to compare these two pectinid species by developing a contamination/decontamination model of domoic acid, linked to the bioenergetics of the individual. The final goal should be to develop a tool to predict decontamination duration depending on environmental conditions and organism physiology, in order to help fishermen managing their fishing activity in case of a toxic algal bloom. The methodology used to develop the model and compare two pectinids species with their own toxin retention and how we could tackle the questions of depuration predictions will be presented.
Consulter en ligne
Suggestions
Du même auteur
