Study On The Trichodinid Ectoparasites (Ciliophora, Peritrida) From The Gills Of Some Economic Ifshes From Minjing River Valley, Sichuan Province

During the investigation of freshwater trichodinids from Minjiang River Valley. Sisteenspecies oftrichodinids were obtained from freshwater fishes, Silurus asotus, Carassius auratus, Misgurnusanguillicaudatus, Pelteobagrus fulvidraco, Hypophthalmichthys molitri, Cyprinus carpio andOphicephalus argus. These known species of trichodinids, subjected to genus of Trichodina, Trichodinellaand Tripartiella, Trichodina hyperparasitis Chen&Hsish, Trichodina reticulata Hirschman&Partsch,1955, Trichodina domerguei Wallengren,1897, Trichodina acuta Lom,1961, Trichodina mutabilisKazubski&Migala,1968,Trichodna nobilis Chen,1963, Trichodina rostrata Kulemina,1968, Trichodinauniforma Van As&Basson,1989, Trichodina kazubski Van As&Basson,1989, Trichodina prowazekiGrupcheva&Lom,1980, Trichodina matsu Basson&Van As,1994, Trichodina wulai Van As&Basson,1994, Trichodina heterodentata Duncan,1977, Trichodina modesta Lom,1970,1984, Trichodinellaepizootica Sramek&Husek,1953and Tripartiella macrosoma Basson&Van As,1987. Trichodina matsuBasson&Van As,1994, Trichodina domerguei Wallengren,1897, Trichodina prowazeki Grupcheva&Lom,1980were first record in Sichuan and Hypophthalmichthys molitrix is a new host record forTrichodina rostrata Kulemina,1968. Trichodina wulai Van As&Basson,1994was new record inmainland of china. The observations in vivo were performed and preparetions made by dry silverimpregnation technique were examined under the Nikon E-600phasecontrast microscope. Allmeasurements are presented in μm and follow the uniform specific characteristic system proposed by Lom(1958). A detailed description of the denticles is presented in accordance with the method proposed byVan As&Basson (1989).The dissertation is aimed to add parasitology of fish new content and provides some basic referencedata for investigating pathogeny and healthy culture.