بررسي اثر سميت آمونياك بر بافت كبد ماهي كپور معمولي (Cyprinus carpio)

The effect of toxic ammonia on liver tissue of common carp (cyprinus carpio)

Th e aim of the present research is to study the toxic effects of Ammonia on the liver of Common carp(Cyprinus carp io), for this purpose ,first of all, the amount of LCso 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, 2/5 [ mglL un-ionized Ammonia were compared with the control group. The LC50 Ammonia amounts in 24,48,72 and96 hour s periods were calculated to be 23/4,20/5,16 /25,14/25 mg/L for total Ammonia and 2/20, 1185, 1145,0/99 mg/L for unionized 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 tissue s 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