ACUTE TOXICITY OF ATRAZINE ON HISTOLOGICAL PARAMETERS OF AFRICAN CATFISH CLARIAS GAREIPINUS JUVENILES (GILLS)
Abstract
In the present study, juveniles of Clarias gariepinus were exposed to the herbicide atrazine in order to determine the herbicide toxicity to the species been exposed. Fish were exposed to acute concentrations of 0.8,0.11,0.14,0.17 and 20ml/L of atrazine, Effects of the herbicide were measured using behavioral, hematological, biochemical, histopathological. Results of the acute toxicity test showed that atrazine was toxic to the species in a dose-dependent manner. Acute concentrations of atrazine also induced an increase in the generation of reactive oxygen species. Histopathological changes observed in the gills included attenuation and clubbing at the tips of the primary lamellae, gradual degeneration of the primary lamellae, total dislocation of the primary lamellae from its position as well as mild congestion in the cartilage.
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