“…Fish are considered a sentinel species in environmental monitoring programs designed to assess the impacts of pulp and paper mill effluents (PPMEs) in Canada (Munkittrick, 2004;Lowell et al, 2005;McMaster et al, 2006), the United States (Sepúlveda et al, 2002;Theodorakis et al, 2006;Yeom and Adams, 2007), Sweden (Larsson et al, 2000;Sandström and Neuman, 2003), Finland (Donald, 2003;Karels and Oikari, 2000) and New Zealand ( Van den Heuvel et al, 2007). In general, less emphasis has been placed on fish-based environmental monitoring in South America.…”