Vol. 8, Issue 3 (2019)

Author(s):
Sharmila Gunasekaran and Kavitha Arumugam Vellaichamy

Abstract:
The introduction of organophosphorus insecticide into the aquatic ecosystem through agricultural runoffs, rainwater seepage adversely affects many non-target organisms including fishes. The chronic effect of organophosphorus pesticide, Monocrotophos on the haematological parameters of freshwater fish, Cyprinus carpio has been investigated in the present study. Cyprinus carpio were procured and their sublethal, median lethal and lethal concentrations for 120 hrs were assessed. Two sub-lethal concentrations (T2) and (T3) were selected to which the fishes were exposed for 30 days. Control set up without monocrotophos (T1) was run simultaneously. Blood from anaesthetised fishes were collected after 30 days of exposure period. Hemoglobin (Hb), Red Blood Cells (RBCs) and hematocrit (Hct) significantly decreased with the increasing concentration of monocrotophos during the experimental periods. But White Blood Cells (WBCs) significantly increased in the treated fishes when compared to the control depicting negative effects of monocrotophos on the hematological parameters of Cyprinus carpio.