Ambient Science: Click the Volume and issue number for Complete Article

Location where to get the Complete Article --> Ambient Science: Vol 2, No 2 (2015): 08-17

ISSN- 2348-5191 (Print version); 2348-8980 (Online)

Evaluating the Feasibility of Using Pellets to Assess Age, Relative Abundance and Habitat of Nilgiri Tahr (Nilgiritragus hylocrius) in Mukurthi National Park, of Nilgiri Biosphere Reserve, India



Ravikanth Manchiryala, Ajay A. Desai, Sandeep Mushkam, Peter P. Predit

Abstract

The Nilgiri tahr; Nilgiritragus hylocrius is an endangered mountain ungulate of India, endemic to two states comes under Western Ghats. It is a social and shy animal found in mixed herds composed of adult and their sub adult young ones. Due to its shy nature and rapid escape tendencies into sharp mountain cliffs the correct population estimation of it is always remain difficult. Thus to make the age-sex estimation of Nilgiri tahr populations feasible, we have used as tools its various sizes of pellets collected from habituated Tahr herd. In the present study, based on pellet sizes about 80% of population were segregated into different age-sex related classes. Result revealed higher overlap in pellet sizes among few age and sex related groups. On the basis of the results the feasibility of using pellet to assess age-sex structure and proper habitat preferred by Nilgiri tahr has been discussed.


References

  • ANON (1989): Biosphere Reserves in India, Government of India: Ministry of Environment and Forests, New Delhi.
  • Daniel, J.C., Ashok, K.M., Sakthivel, C. & Desai, A. (2009): Evaluating population enumeration methods and human elephant conflict migration methods in Mudumalai Tiger Reserve, Tamil Nadu, India. Final Report. Bombay Natural History Society, Mumbai and U.S.Fish and Wildlife Service, Washington, D.C.
  • Daniels, R.J.R. (2006): The Nilgiri tahr: An Endemic South Indian Mountion Goat, MacmillanIndia Ltd, New Delhi.
  • Daniels,R.J.R., Easa, P.S. and Alembath, M. (2008): Distribution and status of the endangered Nilgiri Tahr. Curr. Sci.(1): 10-11.
  • Davidar E.R.C. (1978): Distribution and status of the Nilgiri tahr Hemitragus hylocrius 1975-1978. J. Bom. Nat. His. Soc., 75: 815-844.
  • Harrison, D.L. & Gallagher, M.D. (1974): A park to save the Arabian Tahr. Oryx. 12(5): 547-549.
  • IUCN (2008): Nilgiritragus hylocrius. The IUCN Red List of Threatened Species. Ver.- 2015.2. www.iucnredlist.org.
  • Kannery, S.S. (2002): Ponmoudi-Ibex Hill: Vanishing habitat of an isolated population of Nilgiri tahr. Caprinae (News letter of the IUCN/ SSC Caprinae Specialist Group; August 2002: 5)
  • Mishra, C., & Johnsingh, A.J.T. (1998): Population and conservation status of the Nilgiri tahr Hemitragus hylocrius in Anamalai Hills, South India. Biol. Conserv., 86(2): 199-206.
  • Rice, C.G. (1984): The behaviour and ecology of Nilgiri tahr (Nilgiritragus hylocrius Ogilby,1838.). Ph.D. Thesis, Taxas A M University,College Station.Pp.254.
  • Rice, C.G.(1990): Tahrs (Genus Hemitragus). In Grzimek's Encyclopedia of mammals. Ed. by S.P. Parker. New York: McGraw-Hill. Volume 5, Pp.542-544.
  • Ropiquet, A. & Hassanin, A. (2005): Molecular evidence for the polyphyly of the genus Hemitragus (Mammalia, Bovidae). Mol. Phylogenet. Evol., 36(1): 154-168.
  • Schaller, G.B. (1971): Observation on Nilgiri tahr Hemitragus hylocrius Ogilby, 1838. J. Bom. Nat. His. Soc., 67; 365-389.

  • DOI:10.21276/ambi.2015.02.2.ra01


    Creative Commons License


    This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
    Published by: National Cave Research and Protection Organization, India

    <Environmental Science+Zoology+Geology+Cave Science>AMBIENT SCIENCE