Romavova E. B. RussiaNizhny NovgorodNizhny Novgorod Lobachevsky State University, 23 Gagarina Av., Nizhny Novgorod 603950, Russiaromanova@ibbm.unn.ru Author's articles LEUKOCYTIC INDICES AND MICRONUCLEUS IN ERYTHROCYTES AS POPULATION MARKERS OF THE IMMUNE STATUS OF PELOPHYLAX RIDIBUNDUS (PALLAS, 1771) (AMPHIBIA: RANIDAE) LIVING IN VARIOUS BIOTOPIC CONDITIONS