Submitted to: Book of Abstracts World Aquaculture Society
Publication Type: Abstract Only
Publication Acceptance Date: November 8, 2001
Publication Date: January 27, 2002
Citation: STRAUS, D.L., GRIFFIN, B.R. EFFICACY OF POTASSIUM PERMANGANATE AS A THERAPEUTANT TO TREAT ICHTHYOPHTHIRIASIS IN CHANNEL CATFISH.. BOOK OF ABSTRACTS WORLD AQUACULTURE SOCIETY. 2002. p.324. Technical Abstract: Epizootics of ichthyophthiriasis can be controlled with potassium permanganate (KMnO4), but reports of its effectiveness have not been completely confirmed. The purpose of these studies was to determine the acute toxicity of KMnO4 to the I. multifiliis theront and the concentration nneeded to prevent an initial or stop an active infestation of I. multifili in juvenile channel catfish Ictalurus punctatus. Free-swimming theronts were exposed to concentrations of KMnO4 in well water in 96-well plates and observed for 4 h to determine the acute toxicity. A concentration of 0.9 m KMnO4/L caused greater than 95% mortality of the theronts in 45 min; the 4 h-LC50 value was estimated to be 0.77 mg/L. Channel catfish were exposed t 10,000 theronts/L of well water and immediately treated with a single dose of KMnO4 to determine the concentration needed to prevent the establishment tof ichthyophthiriasis. The lowest effective dose of KMnO4 was 1.0 mg/L. another study designed to determine the concentration needed to stop an active epizootic, fish were infested with I. multifiliis and allowed to develop immature trophonts. They were then moved to individual static containers with 2 L of filtered well water and were treated with KMnO4 dail for 10 days; water was exchanged daily prior to treatment. The lowest effective dose (dose required to eliminate trophonts) of KMnO4 was 1.25 mg/L. These results indicate that low concentrations of KMnO4 are effectiv for controlling I. multifiliis in clean water. However, effective treatmen of pond water will be strongly influenced by detoxication of KMnO4 based on the concentration of easily oxidizable substances in the water.