Morphological and Ecological Features of Some Nematodes of the Genus Rhabdochona in Marinka Obtained From Fergana Valley, Uzbekistan

Abstract The aim is to study the morphological and ecological features of some nematode species of the genus Rhabdochona parasites of marinka fish in the Fergana Valley, Uzbekistan. Rhabdocona gnedini, Rhabdochona denudata and Rhabdocona hellichi turkestanica were detected as 5.3%, 7.9% and 3.7%, respectively. According to the Authors’ knowledge, Rh. hellichi turkestanica was recorded in Uzbekistan and Central Asian republics for the first time. Rhabdocona spp. were only detected in the intestine of marinkas lived in the mountain rivers Rezaksay, Chodaksay and small tributaries of the Syrdarya river in western Fergana. Some abiotic factors such as the flow rate, water temperature and high content of dissolved oxygen in it, as well as the nutritional characteristics of the fish can be most important factors to spread of Rh.denudata, Rh. gnedini, Rh. hellichi turkestanica in marinkas from mountain rivers of the Fergana Valley.