عنوان مقاله [English]
The purpose of this study was to determine the rate of Rhabdochona denudata infection in sand goby in relation the intermediate hosts in the Kaboodval, Zaringol and Shirabad Streams. For this purpose 78, 30 and 55 specimens was analyzed in three streams, respectively, at summer 2008. In general, ٪36.47, ٪47.05 and ٪59.65 from sand goby were identified infected in the Kaboodval, Zaringol and Shirabad Streams respectively. In present study, Rhabdochona denudata parasite for the first time was reported from sand goby in Iran. Range of number Rhabdochona denudata was 1-33 specimens. The relationship between age and Rhabdochona denudata infection (prevalence) showed significant, in three Streams (p<0.05). So that was positive in Kaboodwal and Zarrin-gol and negative in Shirabad Streams, but no significant relationship between infection level and sex of sand goby (p>0.05). It seems that the presence and abundance of Ephemeropterans and Trichopterans nymphs as intermediate hosts of Rhabdochona denudata and feeding rate of them can be role in the rate of infection, So that, the most parasitic infection associated with the highest frequency of Ephmeropterans in environment and gut sand goby was observed in the Shirabad Stream.