Acute effects of glyphosate on the behavioural and hematologal[sic]hematological characteristics of Heteroclarias (hybrid) fingerlings

The toxicity effect of glyphosate on fingerlings of Heteroclarias was studied by carrying out a series of range finding tests: the fishes were exposed to lethal concentration of 0.00 mg/L, 5.40 mg/L, 7.20 mg/L, 9.00 mg/L, 10.80 mg/L and 12.60 mg/L for 96 hours in a renewal bioassay procedure. Findings showed that the 96 hours LC sub(50) was 6.838 mg/L. Respiratory disturbance, erratic swimming, loss of equilibrium, lethargies and sudden fish death were observed in the exposed fish and these varied greatly with differences in concentration of the toxicant and this shows that mortality increases with an increase in concentration. Also, as the concentration of glyphosate increased the beats of the tail and operculum increased in 12 and 24 hours. Also the toxicant led to significant changes (P