Percentage of ChE and CE (with p-NPA and p-NPB) activities in
treated snails with respect to the solvent controls were analyzed
by the non-parametric Kruskal–Wallis test. Significant differences
were analyzed by Dunn’s Multiple Comparisons Test.
Neurotoxicity and lethality were tested through contingency
tables (Fisher’s Exact Test).
The level of significance used was 0.05. Statistical analyses were
performed with Statistica 7.1 and GraphPad InStat 3.01.