Abstract
In standard chronic terrestrial toxicity tests with invertebrates, adult organisms are exposed to the contaminants and the number of offspring is quantified. These procedures do not allow the assessment of possible effects on all life stages of the organism, which may lead to an underestimation of the toxicity of the test substance. To evaluate the importance of this issue, the potworm Enchytraeus albidus was exposed to zinc, cadmium, copper and lead for two subsequent generations. Juvenile production was assessed for both generations. Considering the variability of metal toxicity data reported in the literature, it is concluded that the two generation assay did not markedly increase the sensitivity of the standard E. albidus test for the tested metals. Therefore, toxicity data obtained with the proposed test guideline with E. albidus are protective for all life stages.
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