بررسي آلودگي هاي تك ياخته اي در ماهي استرلياد ACIPENSER RUTHENUS

Study of protozoan parasitic fauna of sterlet (Acipenser ruthenus L.)

Protozoan parasitic fauna of sterlet (Acipenserruthenus L.) caught from the Danube river ; Hungary , was studied . The collected materials obtained from 30 samples were examined in both fresh and stained preparation. The protozological examination resulted in identification of five different species of protozoans consisting: of Gussia acipenseris (21%) , Goussia vargai (13%), Cloromyxum inexpectatum (80%) Sphaerospor colomani (50%) and Zschokkella sturionis. (3.3%). Goussia species was found within epithelial tissues of fish intestine. Also , except for zschokkella sturionis at which identified in fish bilary ducts , other myxosporeans were found within epithelial tissues of urinary tract. Regarding the pathogenicity of these parasites in fish , such high contamination should be concerned when fish are grown commercially.