In the ‘salinity experiment’ (tested salinities were 27.3, 32.3 and 37.3) from the Cd uptake rates (ng g−1 h−1) for a dissolved Cd concentration of 369 ± 11 ng L−1 (Cw, mean ± range) did not vary significantly over the three salinities tested (linear regression, r2 = 0.01 and p = 0.90, data not presented).