Toxicity of Potassium Permanganate to Caspian Kutum (Rutilus frisii kutum) at Two Sizes (1 and 3g)

Authors
A. Jafar Nodeh 1
S. M. Hoseini 2
1 Former MSc Student, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
2 PhD Student, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
Abstract
Acute toxicity (96h-LC50) of potassium permanganate (PM) was determined for Caspian kutum Rutilus frisii kutum at two size classes (1 and 3 g). Static renewal method was used. Fish were exposed to different concentrations of PM and mortality was recorded thereafter, until 96 h. Exposed fish showed behavioral stress indicators. 96h-LC50 was calculated to be 3.204 (3.147-3.260) mg/L for small fish and 3.460 (3.393-3.528) mg/L for large fish. Safe concentration for small and large fish was calculated to be 0.003-0.320 and 0.003-0.342 mg/L, respectively. No Observed Effect Concentration (NOEC) and Lowest Observed Effect Concentration (LOEC) were 2.6 and 2.8 mg/L for small and 2.8 and 3.0 mg/L for large fish. Results indicated that Caspian kutum is susceptible to PM toxicity; although less than many tested species. Likewise, toxicity of PM significantly decreases with increase in fish weight. Higher tolerance in large fish compared to small fish might be as a result of increased stress resistance and higher quality of these fish.
Keywords
Caspian Kutum
LC50
Potassium permanganate
toxicity
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ECOPERSIA
Volume 1, Issue 3 - Serial Number 5
September 2013
Pages 291-298