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A mixture of fipronil and fungicides induces alterations on behavioral and oxidative stress parameters in zebrafish
Ecotoxicology ( IF 2.460 ) Pub Date : 2019-12-21 , DOI: 10.1007/s10646-019-02146-7
Fernanda Bevilaqua, Adrieli Sachett, Rafael Chitolina, Cristiane Garbinato, Henrique Gasparetto, Matheus Marcon, Ricieri Mocelin, Eliane Dallegrave, Greicy Conterato, Angelo Piato, Anna M. Siebel

Pesticide commercial mixtures, including the insecticide fipronil and the fungicides pyraclostrobin and methyl-thiophanate, have been used in concomitant pest control, facilitating agricultural management. Their widespread use can lead to soil and water contamination and potentially induce damages in the ecosystem, producing toxic effects in non-target organisms. Despite their toxicological potential, their effects on behavioral and biochemical parameters are not well understood. Here we investigated the effects of the mixture of fipronil and fungicides (MFF) pyraclostrobin and methyl- thiophanate on behavioral and biochemical parameters of oxidative stress in adult zebrafish. Animals exposed to the highest MFF tested concentration showed a decrease in the total distance traveled and in the number of crossings in the different zones of the tank. Furthermore, animals exposed to highest MFF tested concentration spent more time in water surface. In addition, our data showed that the exposure to this preparation promoted a decrease in non-protein thiol content as well as in catalase activity. Finally, pesticide exposure induced an increase in the superoxide dismutase/catalase ratio. Our results indicate that alterations in behavioral and oxidative parameters are involved in MFF toxicity in zebrafish. The antioxidant mechanisms analyzed were altered in concentrations that did not affect zebrafish behavior. Therefore, the assessment of oxidative stress parameters in zebrafish brains could be very useful to detect the early effects of environmental exposure to the MFF.
更新日期:2020-01-04

 

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