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Primates

, Volume 54, Issue 2, pp 147–152 | Cite as

Ranging and foraging of Himalayan grey langurs (Semnopithecus ajax) in Machiara National Park, Pakistan

  • Riaz Aziz MinhasEmail author
  • Usman Ali
  • Muhammad Siddique Awan
  • Khawaja Basharat Ahmed
  • Muhammad Nasim Khan
  • Naeem Iftikhar Dar
  • Qamar Zaman Qamar
  • Hassan Ali
  • Cyril C. Grueter
  • Yamato Tsuji
Original Article Special contributions 'Out of the tropics: Ecology of temperate primates'

Abstract

Grey langurs (Semnopithecus spp.) occupy a variety of habitats, ranging from lowland forests and semi-desert to alpine forests. Little is known about their foraging and ranging in alpine forests, which appear to contain less food than lowland forests. We conducted a 1-year study of Himalayan grey langurs (Semnopithecus ajax) in Machiara National Park, Pakistan, where they occur at relatively high altitudes (range 2000–4733 m). We followed three groups of different sizes and compositions and examined the effects of ecological and social factors on ranging and feeding. The home-range sizes of a small bisexual group (SBG), a large bisexual group (LBG), and an all-male group (AMG) were 2.35 ± 0.92 (mean ± SD; average of four seasons), 3.28 ± 0.55, and 3.52 ± 1.00 km2, respectively, and were largest in winter for all groups. The daily path lengths of the SBG, LBG, and AMG were 1.23 ± 0.28 (mean ± SD; average of four seasons), 1.75 ± 0.34, and 1.84 ± 0.70 km, respectively; that of the LBG was longer in winter, while that of the AMG was shorter in summer. Both the home-range size and daily path length of the AMG were larger than those of the other groups, even after partialling out the effect of group size differences. The mean altitude used by the langurs and the proportion of animals seen feeding did not differ among seasons or group types. As the mean temperature increased, the altitude used by langurs significantly increased for the SBG and LBG, but not for the AMG. On the other hand, as the temperature increased, the home-range sizes significantly decreased for the SBG and AMG, but not for the LBG. Rainfall did not show any correlation with ranging or feeding in any of the groups. Our results suggested that grey langurs in Machiara National Park employ a high-cost, high-return foraging strategy in winter, and that the ranging of the AMG also reflects its reproductive strategy.

Keywords

Foraging strategy Himalayan grey langur Pakistan Ranging Temperate habitat 

Notes

Acknowledgments

We thank the administration and staff of Machiara National Park for their support and help during our field work, and Dr. Goro Hanya, an anonymous handling editor, and two anonymous reviewers for their constructive comments on an earlier draft of this study.

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Copyright information

© Japan Monkey Centre and Springer Japan 2013

Authors and Affiliations

  • Riaz Aziz Minhas
    • 1
    Email author
  • Usman Ali
    • 2
  • Muhammad Siddique Awan
    • 1
  • Khawaja Basharat Ahmed
    • 1
  • Muhammad Nasim Khan
    • 1
  • Naeem Iftikhar Dar
    • 3
  • Qamar Zaman Qamar
    • 4
  • Hassan Ali
    • 5
  • Cyril C. Grueter
    • 6
  • Yamato Tsuji
    • 7
  1. 1.Department of ZoologyUniversity of Azad Jammu and KashmirMuzaffarabadPakistan
  2. 2.Department of ZoologyMirpur University of Science and Technology, Mirpur Azad Jammu and KashmirMirpurPakistan
  3. 3.Department of Wildlife and FisheriesGovernment of Azad Jammu and KashmirMuzaffarabadPakistan
  4. 4.Breath Foundation, Azad Jammu and KashmirMuzaffarabadPakistan
  5. 5.GIS Lab, WWF-PakistanLahorePakistan
  6. 6.School of Anatomy, Physiology and Human BiologyThe University of Western AustraliaCrawleyAustralia
  7. 7.Primate Research InstituteKyoto UniversityKyotoJapan

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