Abstract

ADVERSE EFFECTS OF CHLORPYRIFOS PESTICIDE IN AQUATIC ANIMALS ESPECIALLY IN DANIO RERIO

B. Sreedevi, V. Saleem Basha* and G. H. Philip

Abstract

Presence of pesticide residues in water or soil creates many biological, morphological and physiological abnormalities in the growth and development of some aquatic animals. Chlorpyrifos, an organophosphate pesticide in agriculture and urban house hold has been receiving growing environmental concern due to its abnormal biological activities. An attempt has been made to examine the potential developmental effects of non-lethal concentration of chlorpyrifos using zebra fish (Danio rerio) as an example. Different concentrations of chlorpyrifos i.e., 400 μg/L, 600 μg/L, 800 μg/L and 1000 μg/L were exposed to the fertilizesd eggs as well as adult Zebra fish and morphological, physiological abnormalities were observed and delay in hatching, difference in yolk sac size and decrease in pigmentation were observed in embryos before hatching, where as in larvae edema, shrinking of yolk sac and dorsal curvature of the body was noticed. From the studies carried out chlorpyrifos was shown to delay hatching and also caused different morphological abnormalities. The suggestion made can bring awareness of usage of synthetic pesticides.

Keywords: Chlorpyrifos, Zebra fish, Morphological Abnormalities, Vitellogenin Utilization.