Figure 6.

Observed paralytic shellfish toxins (PST) field detoxification rates (red circles) and the rates predicted in a one-box model (blue lines) for the clam Ameghinomya antiqua from March 2009 to March 2010 in two patches of the fishing zone at Ovalada Island: (A) north and (B) south. The instantaneous decay rate (model parameter k) is indicated in both cases. Sky-blue shaded areas indicate the confidence interval (95%) for the model estimation, and the dashed lines the regulatory limit for PST consumption by humans (80 μg STX eq. 100 g⁻¹).