Acute toxicity of iodine to channel catfish (Ictalurus punctatus).

Abstract

As part of the screening process for a fish parasiticide (a tri-iodinated ion exchange resin), the acute toxicity of diatomic iodine (19) to channel catfish (Ictalurus punctatus) was determine~. The general use of chlorine, another halogen, as a disinfectant and antifouling chemical has led to many studies documenting its severe toxicity to fish at low concentrations (ZILLICH 1972, BRUNGS 1973). The only known information concerning the toxicity of iodine to fish is reported by GOZLAN (1968) who found that 8.0 mg/liter was lethal to a species of mullet (Mugil sp.). The exposure period was not reported.