First Occurrence and Intensity of Posthodiplostomum cuticola (Nordmann, 1832) (Digenea; Diplostomatidae) Metacercariae in Monkey Goby ( Neogobius pallasi berg, 1916) In the Zarringol Stream, Golestan Province, Iran

摘要

Posthodiplostomum cuticola metacercariae infection has reported for the first time from monkey gobyin the Zarringol Stream. In this study, 30 specimens were examined, at summer 2008. Range of frequency ofP. cuticola was 7-218 per host. The dorsal and pectoral fins had the highest significant number of cystsmetacercariae than other organs (p<0.05). The significant differences between the fish age and the average ofparasites was also recorded. As the age increases, intensity and abundance of parasitic infection also increased(p<0.05). It seems, increasing of the infection in elder of individuals is due to larger size of the fish body surfacearea and long duration of parasite exposure.