INTRODUCTION
The application of environmental toxicology
studies on non-mammalian vertebrates is rapidly
expanding, and, for aquatic systems, fish have
become indicators for the evaluation of the effects
of noxious compounds. The indiscriminate use of
herbicides, careless handling, accidental spillage, or
discharge of untreated effluents into natural waterways
have harmful effects on the fish population and
other forms of aquatic life and may contribute longterm
effects in the environment.