Vol. 14,No. 2, April 2015
Protozoan epibionts on Astacus leptodactylus (Eschscholtz, 1823) from Aras Reservoir, Northwest Iran
Description: 1- National Artemia Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, P.O.Box:368, Urmia, Iran. 2- Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Tehran, Iran. 3- Faculty of Veterinary Medicine, Urmia Branch, Islamic Azad University, Urmia, Iran. *Corresponding author's email: dr.nekuiefard@gmail.com
Text: 
Abstract
The Astacus leptodactylus specimens were collected from four sites of Aras reservoir, North-West of Iran and examined for the epibionts during 2009. Protozoan epibionts from ciliophora (one genus and seven species) and tracheophyta were isolated from the cuticular surface of different body parts of narrow-claw crayfish,A.leptodactylus. Seasonal prevalence of infestation was determined in 394 individuals ofA.leptodactylus. The facultative ciliateTetrahymena pyriformiswas identified on the gills and gill haemocoel with 0.5% prevalence. Futhermore, epibiont fouling organisms such asEpistylis chrysemidis(52.3%);Vorticella similis(45.9%);Cothurnia sieboldii(68.5%);Pyxicola annulata(66%); Chilodonellaspp.(0.5%);Zoothamnium intermedium(57.1%);Opercularia articulate(20.6%) andPodophrya fixa(8.6%) were also isolated from 13 body parts ofA.leptodactylus. The presence ofChilodonella infestation is the first record of this genus on freshwater crayfish species. The comparison of biometrical data of the epibionts showed no significant differences in prevalence of seasonal infestation between sampling sites. The current work represents the first documentation for the presence of protozoan epibionts onA.leptodactylusin Aras Reservoir, Iran.
Keywords:Protozoan,Astacus leptodactylus, Epibiont, Aras Reservoir, Iran

Tuesday 22 Sep 2015
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