www.iaard.net IAARD Journals eISSN:2456-009X International Journal of Agriculture And Veterinary Sciences IAARD-International Journal of Agriculture and Veterinary Sciences, 2018, 4(2),11-15 Occurrence and prevalence of Metazoan Parasites in farmed Nile tilapia (Oreochromusniloticus) and Commoncarp (Cyprinuscarpio) in Sebeta fish farm, Sebeta, Ethiopia *Marshet Adugna Mitiku *EthiopianInstitute of Agricultural Research, National Fishery and Aquatic Life Research Center, Sebeta, Ethiopia P. O. Box 64, Sebeta, Ethiopia Email:
[email protected] ………………………………………………………………………………………………………………………………………………………….. Abstract: Fish farming is the fastest growing sector of agriculture worldwide but many factors affect its development including fish parasites. A cross sectional study was conducted from November, 2016 to April, 2017 with the objective of identifying and determining the prevalence of internal parasites of fish from Nile tilapia and Common carp in Sebeta fish farm.Parasite identification was done based on the standard protocols and available manuals. The overall prevalence of internal parasites infection in the two species of fish was 46.67%. The risk factors considered in this study including sex and size of fish for the prevalence of internal parasite infestation showed statistically significant difference (P< 0.05). However, there was no statistically significant difference (p>0.05) in the prevalence of the parasite between the two species of fish. The highest prevalent parasite was the trematode Clinostomum species(13.6%) followed by Cestode Botherocephalus species and Nematode Contracaeum species. The lager sized fish are found highly infested than smaller sized fish. It is therefore important to control intermediate host, washing and disinfecting of ponds regularly and keeping good quality water as a means of prevention of the occurrence of internal parasites.