Evaluation of the toxicity of the mixture of diflubenzuron and p-chloroaniline in tilapia fish in the presence and absence of soil.

aBSTRACT: Several chemicals occur together in the environment as a result of different sources. However, in the great majority of risk assessments only a single chemical is considered. Diflubenzuron (DFB), the most used compound to combat parasites in aquaculture, can be toxic for non-target species. When degraded, it generates p-chloroaniline (PCA), a potentially carcinogenic and mutagenic compound. This study analyzed the activity of the enzymes: Catalase (CAT), acid and alkaline Phosphatase (ACP/ALP) of the gills of the Tilapia fish (Oreochromis niloticus) exposed to different concentrations of the mixture of DFB and PCA in the presence and absence of soil.