%0 Journal Article %T Intraclonal variability in Daphnia acetylcholinesterase activity: The implications for its applicability as a biomarker %A Printes, Liane Biehl %A Callaghan, Amanda %J Environmental Toxicology and Chemistry %V 22 %N 9 %P 2042-2047 %@ 0730-7268 %D 2003-09-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve