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Saxitoxin content (STXs eq) from Alexandrium pacificum Alex05 cultured at various salinity concentrations (20, 25, 30, 35, and 40 psu) after 3, 14, and 21 days. Error bars represent standard deviations. Significant differences between the control (30 psu) and treatments, as determined by one-way ANOVA, are indicated with ** p < 0.01 and *** p < 0.001.
