The preferred fodder of horses is grass. This is true for domestic horses as well as for wild horses in the Gobi Desert. A team of researchers from the Research Institute of Wildlife Ecology from the University of Veterinary Medicine, Vienna found out through tail hair analysis that before their extinction in the wild Przewalski’s horses had been on a different diet than today. Thanks to improved societal attitude, the horses have now access to richer pastures. In former times, the wild horses were hunted and chased away into less productive habitats.
The Przewalski’s horse, also called Takhi or Mongolian wild horse, is the only remaining wild horse species. In 1969, wild horses were officially declared extinct. However, a few animals survived in captivity. In 1992, first captive bred wild horses were returned to the wild.
Petra Kaczensky and Martina Burnik Šturm from the Research Institute of Wildlife Ecology from the University of Veterinary Medicine, Vienna now found out that before their extinction in the wild Przewalski’s horses were on a mixed diet. In summer, they only ate grass, in winter also less nutritious bushes. After their reintroduction, the animals only eat high-quality grass throughout the year.
The article "Stable isotopes reveal diet shift from pre-extinction to reintroduced Przewalski’s horses” by Petra Kaczensky, Martina Burnik Šturm, Mikhail V. Sablin, Christian C. Voigt, Steve Smith, Oyunsaikhan Ganbaatar, Boglarka Balint, Chris Walzer and Natalia N. Spasskaya was published in Scientific Reports.
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(Web editor, 21 July 2017)