Morphology and intensity of Trichodina spp. in the nilem fish larvae (Osteochilus hasselti) hatchery fish by the Kutasari Purbalingga, Central Java

Abstract

Abstract. Riwidiharso E, Alfarisi B, Rokhmani. 2018. Morphology and intensity of Trichodina spp. in the nilem fish larvae (Osteochilus hasselti) hatchery fish by the Kutasari Purbalingga, Central Java. Pros Sem Nas Masy Biodiv Indon 5: 316-323. Research has been conducted to identify Trichodina sp. and intensity of Trichodina sp. on the seeds of nilem fish belonging to the Kutasari Purbalingga Fish Seed Hall. The method used in this research is survey method. Sampling is done by simple random sampling. The number of samples taken is determined using the Slovin formula in the total population known. Research variables in the form of morphology Trichodina sp. with parameters in the form of blade, apex blade, distal blade margin, tangent point, and ray shape; meristic with the parameters of the number of denticles; and morphometrics with parameters such as body diameter, denticle ring diameter, adhesive disk diameter, and border membrane width for identification of Trichodina sp .; and parasitic intensity with the number of Trichodina sp. and seeds of nilem fish infected with Trichodina sp. The results of this study, a total of 150 nilem fish seeds were observed, 105 were infected with Trichodina spp. Or 70%. Intensity of Trichodina sp. on fish seeds belonging to the Kutasari Purbalingga Fish Seed Hall of 16.08 individuals / head so that it was in the medium category. The identification of Trichodina sp. in the seeds of nilem fish with the identification of 50 individuals Trichodina sp. are species of T. acuta, T. heterodentata, T. nobilis