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Field survey inside an oyster farm in Thau Lagoon in 2014. Oyster mortality (A); water temperature and salinity (B); abundance of A. catenella in water (C); accumulation of paralytic shellfish toxins in surviving oysters (D). The bar charts represent (in %) the temporal toxin in oysters. (Neo-STX for neosaxitoxin, GTX2 for gonyautoxin 2 and dc-GTX2 for decarbamoyl gonyautoxin 2).
