Figure 2.

(a) Concentrations of PSP toxins in blue mussels measured from SEATOR partners in 2022 (blue points, data from SEATOR) and trend line calculated using locally estimated scatterplot smoothing (LOESS, dashed line). (b) Concentrations of PSP toxins in butter clams measured in this study (orange points), boxplots are also shown for distributions for each sampling period (5)—note the log scale on both y-axes. The dashed line at 80 µg STX-eq 100 g⁻¹ is the US FDA limit for human consumption, and the dotted line at 5 µg STX-eq 100 g⁻¹ is the detection limit of the assay.