Feeding of Bait to Snail Lymnaea acuminata and Their Effect on Certain Enzyme in the Nervous Tissue
Table 2
Effect of sublethal exposure (20% and 60% of 24 h and 96 h LC50) of bait formulations containing eugenol, ferulic acid, umbelliferone, and limonene on the activity of acetylcholinesterase (AchE) in the nervous tissue of the snail L. acuminata.
Treatment
24 h LC 50
96 h LC50
Withdrawal
20%
60%
20%
60%
60% (96 h LC50)
Control (Agar)
0.099 ± 0.002 (100)
0.097 ± 0.007 (100)
Control (a) Glu. + Meth.
0.098 ± 0.003 (100)
0.097 ± 0.005 (100)
Control (b) Star. + Meth.
0.097 ± 0.002 (100)
0.098 ± 0.006 (100)
Control (c) Glu. + Hist.
0.096 ± 0.005 (100)
0.095 ± 0.001 (100)
Control (d) Star. + Hist.
0.098 ± 0.004 (100)
0.097 ± 0.006 (100)
Glu. + Meth. + Eug.
0.075 ± 0.001* (75.75)
0.063 ± 0.002* (63.63)
0.05 ± 0.001* (58.58)
0.051 ± 0.003* (51.51)
0.067 ± 0.006+ (69.07)
Glu. + Meth. + Fer.
0.065 ± 0.003* (65.65)
0.051 ± 0.002* (51.51)
0.086 ± 0.003* (86.86)
0.065 ± 0.004* (65.65)
0.078 ± 0.003+ (98.73)
Glu. + Meth. + Umb.
0.073 ± 0.001* (73.73)
0.068 ± 0.008* (68.68)
0.070 ± 0.003* (70.70)
0.055 ± 0.001* (55.55)
0.063 ± 0.001+ (64.94)
Glu. + Meth. + lim.
0.078 ± 0.002* (78.78)
0.069 ± 0.001* (69.69)
0.067 ± 0.002* (67.67)
0.060 ± 0.003* (60.60)
0.075 ± 0.002+ (77.31)
Star. + Meth. + Eug.
0.055 ± 0.006* (55.55)
0.050 ± 0.003* (50.50)
0.058 ± 0.005* (58.58)
0.049 ± 0.006* (49.49)
0.055 ± 0.004+ (56.70)
Star. + Meth. + Fer.
0.062 ± 0.004* (62.62)
0.060 ± 0.008* (60.60)
0.058 ± 0.001* (58.58)
0.054 ± 0.003* (54.54)
0.059 ± 0.003+ (60.82)
Star. + Meth. + Umb.
0.072 ± 0.005* (71.71)
0.065 ± 0.001* (65.65)
0.062 ± 0.002* (62.62)
0.057 ± 0.005* (57.57)
0.062 ± 0.003+ (63.91)
Star. + Meth. + Lim.
0.072 ± 0.008* (72.72)
0.063 ± 0.004* (63.63)
0.068 ± 0.003* (68.68)
0.058 ± 0.002* (58.58)
0.062 ± 0.001+ (63.91)
Glu. + hist. + Eug.
0.057 ± 0.001* (57.57)
0.054 ± 0.002* (54.54)
0.055 ± 0.007* (55.55)
0.050 ± 0.007* (50.50)
0.058 ± 0.006+ (59.79)
Glu. + Hist. + Fer.
0.082 ± 0.003* (82.82)
0.075 ± 0.006* (75.75)
0.069 ± 0.003* (69.69)
0.061 ± 0.003* (61.61)
0.069 ± 0.003+ (71.13)
Glu. + Hist. + Umb.
0.070 ± 0.008* (70.70)
0.068 ± 0.001* (68.68)
0.069 ± 0.004* (69.69)
0.066 ± 0.002* (66.66)
0.070 ± 0.006+ (72.16)
Glu. + Hist. + Lim.
0.069 ± 0.003* (69.69)
0.066 ± 0.003* (66.66)
0.065 ± 0.007* (65.65)
0.060 ± 0.003* (60.60)
0.006 ± 0.003+ (68.04)
Star. + Hist. + Eug.
0.057 ± 0.006* (57.57)
0.055 ± 0.004* (55.55)
0.055 ± 0.003* (55.55)
0.051 ± 0.005* (51.51)
0.057 ± 0.008+ (58.76)
Star. + Hist. + Fer.
0.060 ± 0.003* (60.60)
0.059 ± 0.003* (59.59)
0.058 ± 0.002* (58.58)
0.055 ± 0.001* (55.55)
0.058 ± 0.002+ (59.79)
Star. + Hist. + Umb.
0.078 ± 0.008* (78.78)
0.077 ± 0.006* (77.77)
0.075 ± 0.001* (75.75)
0.070 ± 0.003* (70.70)
0.073 ± 0.006+ (75.25)
Star. + Hist. + Lim.
0.074 ± 0.003* (74.74)
0.071 ± 0.002* (71.71)
0.072 ± 0.002* (72.72)
0.068 ± 0.004* (68.68)
0.073 ± 0.003+ (75.25)
Each value is mean ± SE of six replicates. Values in parentheses are percent change with control taken as 100%. Concentration (w/v) has been expressed as final concentration in aquarium water. *Significant (P < 0.05) when t-test was applied in between treated and control groups and +in between 60% of 96 h LC50 and withdrawal group. Glu.: glucose; Star.: starch; Meth.: methionine; Hist.: histidine; Eug.: eugenol; Feb.: ferulic acid; Umb.: umbelliferone; Lim.: limonene.