Abstract

A Daphnia magna long term reproduction toxicity test was performed as part of a pilot ring test in the frame of the development of the EC test guideline "Prolonged toxicity study with Daphnia magna: effects on reproduction". The participation of our laboratory was directed at the comparison of the performance of two clones of D.magna and the influence of three different test media on the results of this reproduction toxicity test. In the experiment differences in reproductive performance between clones were observed, depending on the test media used.