The present study aims to investigate the effects of the pesticides atrazine and terbufos on the killifish (Fundulus kansae). Three concentrations (Low, ¼ LC50; medium, 1/2 LC50 and high, 3/4 LC50) were selected for each pesticide. The fishes raised in water polluted with the insecticides showed abnormal deeds like excitation, erratic swimming and marked cutback in the feeding rates. In addition, abnormal respiratory movements and loss of balance were observed in the fishes exposed to the high concentration of the pesticides. The liver of treated killifish exhibited hepatic lesions, cellular degeneration, massive internal hemorrhages and karyolysis. Combined effects of applied pesticides possessed massive alterations.
Key words: Killifish, Atarzine, Terbufos, Liver, Histology.
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