The effect of toxic ammonia on liver tissue of common carp (cyprinus carpio)
Subject Areas : environmental management
Keywords: LC50, Common Carp, Ammonia, Liver,
Abstract :
The aim of the present research is to study the toxic effects of Ammonia on the liver of Common carp(Cyprinus carpio),for this purpose ,first of all, the amount of LC50 for the toxic Ammonia for periods of 24,48,72 and96 hours when the Common carp was exposed to it was measured, then the changes in the histologic survery in the four tests groups placed under concentration of 8,14,20,25 mg/L Total Ammonia that equals with 0/31,0/88,1/73, 2/51 mg/L un-ionized Ammonia were compared with the control group. The LC50 Ammonia amounts in 24,48,72 and96 hours periods were calculated to be 23/4,20/5,16/25,14/25 mg/L for total Ammonia and 2/20,1/85,1/45,0/99 mg/L for un-ionized ammonia, Respectively shows the high resistance of Common carp to ammonia. The liver tissue were sampled in the experimental concentrations in periods of 24,48,72 and96 hours and the study of the smears prepared from these tissues showed clear changes including tissue necrosis, hemorrhage, existence of melanin and bile salt, infiltration, trombo thelebitis, cronic focal necrosis, conjestion, intracellular adema, anemia of Liver when the fish is exposed to Ammonia.