All about Gaur (Bos gaurus)

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Home range, habitat use and food habits of re-introduced gaur (Bos gaurus gaurus) in Bandhavgarh Tiger Reserve, Central India


Abstract: 

Gaur, which became locally extinct before 1995 in Bandhavgarh Tiger Reserve (BTR), Central India,  is an endangered animal per Schedule – I of the Indian Wildlife Protection Act (1972).  A re-introduction program was therefore created to rebuild the gaur population in BTR, both to enhance the long-term survival of the species and to restore natural biodiversity. After re-introduction, the home range, habitat use and food habits of gaur (Bos gaurus gaurus) were studied in BTR, India, from January 2011 to January 2012. Nineteen gaurs (five males - three radio-collared and 14 females - nine radio-collared) were re-introduced from Kanha Tiger Reserve to Bandhavgarh Tiger Reserve in January 2011. The reintroduced gaurs were monitored periodically through ground tracking and satellite GPS fixes. The mean annual group size of gaur was estimated at 7.3 ± 0.76 (SE). The overall estimated summer, monsoon and winter home ranges of gaur were 290 km2, 137 km2 and 155 km2 (Minimum Convex Polygon) respectively. The overall individual male home ranges varied from 135 to 142 km2, and overall individual female home ranges varied from 32 to 169 km2. Radio collared locations were plotted on a classified (LISS III) habitat map of Bandhavgarh Tiger Reserve to evaluate the habitat use and availability in each season. Habitat preference was computed using Bonferroni confidence interval method, compositional analysis and Ivlev’s index. In summer, gaur largely preferred grassland (P<0.0001), whereas in monsoon and winter, gaur preferred bamboo mixed forest (P<0.0001). Gaur avoided open mixed forest (P<0.0001) and agricultural land in all three seasons. Data on food habits  were collected through opportunistic sightings. In total, gaur fed on 68 plant species. The present study has reported first-time information on ranging patterns of reintroduced gaur and their degree of preferences  for different vegetation and terrain types across seasons, which will be very useful to the park administration for future conservation of this endangered species and for  habitat intervention. Reply