Effect of Temperature on Copper Toxicity, Acummulation and Purification in tropical Fish Juveiles Petenia Kraussii (Pisces: Cichlidae)

摘要

Static biotrials were conducted at 22 deg. C and 30 deg. C, exposing Petenia kraussii juveniles to copper sub-lethal doses of 0.2 and 1.2 ppm for 4 weeks and the same depuration period. Results showed that temper- ature, metal concentration, and exposing time are determining factors in copper accumulation and purification processes. Copper concentrations of 0.2 ppm at 22 deg. C are usually regulated by the fish, but at 30 deg. C the metal is not accumulated.