Abstract
Fipronil (C12H4Cl2F6N4OS, CAS No: 120068-37-3) is frequently used in agricultural fields and veterinary medicine as an insecticide and acaricide. It is known to contaminate aquatic ecosystems by mixing with surface waters and to accumulate in abiotic matrices. In this study, the effects of fipronil are investigated using freshwater snails Viviparus contectus (Millet, 1813). After exposure of snails to 1, 10 and 100 mg L-1 fipronil for 7 days, all body tissues were taken. As a result of the study of glutathione, one of the tissue antioxidant parameters, a significant increase was observed in the control group, which was administered 1 mg L-1 fipronil, compared to the other dose groups (P<0.05). Exposure to different concentrations of fipronil resulted with degenerations and necrosis of the digestive gland tubules of snails, histologically. The damages in the digestive gland tissue were increased with increasing of the concentration. Since snails are an important species for freshwater ecosystems, it can be emphasized that pesticides such as fipronil pose a potential risk to these organisms.
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