Atyasheva T. N. RussiaTogliattiInstitute of Ecology of the Volga River Basin, Russian Academy of Sciences, 10 Komzin Str., Togliatti 445003, Russiamalenyov@mail.ru Author's articles VENOM’S YIELD AND VENOM’S PROPERTIES OF EASTERN STEPPE VIPER VIPERA RENARDI AT DIFFERENT TIMES OF ITS SEASONAL ACTIVITY