ANINVESTIGATION ON GYRODACTYLID HELMINTH FAUNA OF CHUB,SQUALIUS CEPHALUS (LINNAEUS,1758)IN RELATION TO SEASONAL CHANGES, HOST AGES AND SEX

摘要

In this study, the gyrodactylid helminth fauna on 150 pc Squalius cephalus (Linnaeus, 1758) from Tasoluk Dam Lake, Afyonkarahisar, Turkey was in-vestigated. Two gyrodactylid helminth species were determined from the host fish specimens:Gyrodac-tylus scardiniensis was found on gill branches and fins of the host fishes and Gyrodactylus prostae on gill arches of the host fish samples. Gyrodactylus scardiniensis was found only on gills of the host fish duringthe spring(prevalence 19.0, mean number of parasites and standard deviation 6.6±4.1), while it was recorded on fins in the spring and winter sea-sons(40.4,11.4±9.9).The other species, Gyro-dactylus prostae was found on gill arches ofhost fish in spring and summer periods(7.1,17.3±17.2). Gyrodactylus scardiniensis had a maximum infec-tion value on fishes of small size groups(19.5, 10.2±10.1),while it was notrecorded on the biggest host fish sizes. Gyrodactylus prostae was found on small(7.6,12.7±7.1)and medium host fishes (2.2,14.0±0.0).Gyrodactylus scardiniensis and Gyrodactylus prostae infection values were higher on females fish than males (respectively, 16.0, 10.4±9.1 on famale,15.7,9.1±4.6 on male and 11.6,12.7±8.8 on female,2.6,2.0±0.0on male). With the results ofthis study, the interaction between infection values of the two Gyrodactylid parasite species and other some ecological parameters from Lake Dam Tasoluk, Turkey located in the Middle East Region was determined.