The survival in exposed groups was significantly
lower in relation to control groups exposed for
the same period (24 h: H=5.3976, p=0.0209; 48 h:
H=5.6, p=0.0209). Besides, it can be observed
that the exposure time also influenced on survival.
Snails exposed for 48 hours showed survival means
significantly lower (H=4.7573, p= 0.0296). It was
not observed significantly difference on survival
of control groups exposed for both intervals
(H=0.0208, p=0.8852) Figure 4.