Identifikasi dan Prevalensi Ektoparasit pada Ikan Nila (Oreochromis niloticus) di Rawa dan Tambak Paluh Merbau Percut Sei Tuan Sumatera Utara

Abstract

Research on Identification and prevalence of ectoparasites on nila’s (Oreochromis niloticus) in the swamp and pond Paluh Merbau Percut Sei Tuan North Sumatra conducted in Balai Karantina Ikan I Medan I on July to September 2014, aims to determine the types of ectoparasites that attack nila in ponds and swamps Paluh Merbau Percut Sei Tuan, as well as compare the prevalence of ectoparasites from both locations. Sampling was carried out one at random as many as 10 nila’s at each location. Samples of nila in part estimated attacked ectoparasites (gills, body mucus,fins mucus, and eyes mucus) by means of scrapping, and observed under a microscope. The results showed three types of ectoparasites namely, Dactylogyrus sp., Caligus sp, and Trichodina sp. and showed that the prevalence of ectoparasites on nila’s (O. niloticus) is the highest in the swamp Paluh Merbau Percut Sei Tuan is Dactylogyrus (gill 80%), Calligus sp. (Mucus body 60%), and Trichodina sp. (Mucus body 20%), whereas in ponds Paluh Merbau Percut Sei Tuan is Dactylogyrus sp. (Gill 70%, and 10% body mucus). In the eyes and fin mucus of nila’s in the swamp and in the ponds, there were no attacks ectoparasites.