Some ectoparasites of fry red tilapia Oreochromis sp. cultured in Thua Thien Hue province

Abstract

Abstract: Analyzing 312 fry red tilapia samples detected 4 ectoparasites: Trichodina siluri, Apiosoma sp., Cichlidogyrus sp.  and Ergasilus sp. Trichodina siluri parasitized in all three organs tested, including skin, gill and fin; especially, infected gills were the organ presented the greatest rate with 60,9%. In this study, the prevalence and intensity of Apiosoma sp., Cichlidogyrus sp. và Ergasilus sp. were recorded 17,63% with 1,1, 52,24% with 3,4 and 15,38% with 4,4, respectively. It noted that Apiosoma sp., Cichlidogyrus sp. and Ergasilus sp. were only found out in gills infected with high rate while others appeared with low rate.