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