Nile tilapia,
Oreochromis niloticus, is one of the most common freshwater
fish used in toxicological studies (Figueiredo-Fernandes et al.
2006a,b, Garcia-Santos et al. 2006), because it present a number
of characteristics that may make it an appropriate model that
can be used as indicator species in biomonitoring programmes
(Gadagbui et al. 1996).