When transferred to clean water, at days 7 and 21 of recovery, only 15% of the snails
did not adhere to the recipient (Fig. 3a). Individuals showing weak
adherence, increased significantly to 53% on the 7th day of recovery
(Fisher’s Exact Test; P < 0.05), and then decreased to 20% and
14% at days 14 and 21, respectively (Fig. 3b). The high percentage
of treated individuals showing protrusion of head–foot region after
48 h of exposure diminished significantly to 21% at day 7 of recovery
in pesticide-free water (Fisher’s Exact Test; P < 0.05). At days 14
and 21 none of the snails presented this neurotoxicity sign (Fig. 3c)