The review about population of Przewalski horses is prepared by scientists-biologists (Zharkikh T.L. and Yasynetska N.I.). These scientists directly engaged in researches of these animals in the conditions of a Chernobyl Exclusion Zone and the Zone of Unconditional (obligatory) Resettlements.
In 1998, the Biosphere Reserve Askania Nova launched a Programme on establishing a free-roaming population of the Przewalski horse in the exclusion zone of the Chernobyl power plant for the purpose of restoring and enrichment of biodiversity of its ecosystems.
In 1998 and 1999 the Reserve together with the State Forest Enterprise Chernobylles transported 31 Przewalski horses including 10 males and 18 females from Askania Nova and 3 males from a local zoo of the Lozovski stud to the Chernobyl exclusion zone.
Eight horses including 2 ones from the local zoo died during transportation or soon after that; others formed 2 harem groups and one bachelor group. The Przewalski horses were kept in acclimatization enclosures from few weeks to 8 months; then they were released into the wild. The only survived male from the local zoo refused to leave the acclimatization enclosures and died there 18 months later.
In 2004, unknown to the Reserve Askania Nova, other thirteen PHs were transported from some city zoos into Chernobyl exclusion zone and were released into the wild without acclimatization. The Przewalski horses failed in adaptation to the nature environments and soon died without posterities.
Przewalski horses began breeding in 1998. Totally, 15 mares and 2 stallions (61% of the horses transported from Askania Nova) gave offspring and became founders of the population. The first foals of the 2nd generation were born in 2004. More....