RUDN Journal of Agronomy and Animal IndustriesRUDN Journal of Agronomy and Animal Industries2312-797X2312-7988Peoples’ Friendship University of Russia named after Patrice Lumumba135710.22363/2312-797X-2015-2-81-87Research ArticleA comparative behavioral evaluation of the medicinal leech (Hirudo medicinalis) under different containing regimeYousefichahardehiMDepartment of standardization, metrology and technology of the livestock productsmyousefi81@gmail.comNikishovA ADepartment of standardization, metrology and technology of the livestock productsa.nikishov@rudn.ruAbtahiBFaculty of Biological Sciencesabtahi.b@gmail.comPeoples’ Friendship University of RussiaShahid Beheshti University150220152818705092016Copyright © 2015,2015The purpose of this study was to evaluate the distribution of the medicinal leech, Hirudo medicinalis, in the containers, type of motion in the water recirculating system, and to find the optimal frequency of exchange of water in this system. According to the results, there are found that the living conditions, created in the experimental group with a recirculation of water at the rate of 48 times a day, had the best positive impact on the welfare of the medicinal leech.medical leechrecirculation systemthe type of motionмедицинская пиявкарециркуляционная систематип движений