DA concentration in the digestive gland of scallops P. maximus after 6 days of depuration in seawater (control) or seawater supplemented with N-Acetylcysteine (250 mg L⁻¹) (treated). The upper and lower limits of the boxes are the quartiles, the middle horizontal line is the median, the extremes of the vertical lines are the upper and lower limits of the observations, the dots are the individual observations, and the blue dots are the means. Data were analyzed using the experimental condition (two levels) as independent variable in a two-sample t-test. The t-test statistic and degrees of freedom (df) are reported. The level of statistical significance was set at α = 0.05, n = 12 scallops per condition.