Cadmium concentrations (mean and standard deviations in brackets) in eggs of <i>Cantareus aspersus</i> recorded throughout the duration of the experiment (0–12 days).

For each point of measurement, pooled samples from three replicate exposures were considered (n = 3), showing means and standard deviations (in brackets). Significant differences of values between single treatments and times were expressed by different superscript lower case letters (a, b, c, d) (Mann-Whitney U test, p < 0.001). Cadmium concentrations (mean and standard deviations in brackets) in eggs of Cantareus aspersus recorded throughout the duration of the experiment (0–12 days).