PT Journal
AU Koci, V
   Mlejnek, M
   Burkhard, J
TI Statistical evaluation of algal toxicity bioassays [in Czech]
SO Czech Phycology
PY 2002
BP 139
EP 142
VL 2
IS 1
AB The article deals with the problems of statistical presentation of algal toxicity tests. We performed 12 and 10 parallel cultivations of algal suspensions in standard condition for toxicity assays. We suggest that the deviation up to 15%. determined by Probit analysis is not fully adequate for determination of EC50 for algal bioassays. Log-Lin linear regression fits better for experimental data. Only concentrations with inhibition effects from 20% to approximately 80% are recommended for calculation. For NOEC we recommend to choose the highest tested concentration with inhibition effect under 20%. Consequently, the next higher concentration with inhibition effect > 20% is recommended for LOEC determination.
ER