The growth analysis of groups exposed for 48 hours was carried out until the 60º day of observation
due to the high mortality on these groups after this period. The tests demonstrated that the average size
of groups exposed for 24 h do not differed from
control group at the end of 90 days (H=0.8628,
p=0.353). Nevertheless, the exposure time influenced
the growth and the higher exposure period showed a
lower growth in comparison to control group (H= 8.6729, p=0.0033). The average size obtained for
the groups exposed for 24 h was 9.66±0.87 mm
and 8.6±1.93 mm for control and exposed groups
respectively and to the groups exposed for 48 h the
average size was 10.00±1.71 mm for control group
and 7.06±1.61mm for exposed group.