Density and population estimate of gibbons (Hylobates albibarbis) in the Sabangau catchment, Central Kalimantan, Indonesia

Abstract

We demonstrate that although auditory sampling is a useful tool, this method alone will not provide a truly accurate indication of population size, density and distribution of gibbons in an area. If auditory sampling alone is employed, we show that data collection must take place over a sufficient period to account for variation in calling patterns across seasons. The population of Hylobates albibarbis in the Sabangau catchment, Central Kalimantan, Indonesia, was surveyed from July to December 2005 using methods established previously. In addition, auditory sampling was complemented by detailed behavioural data on six habituated groups within the study area. Here we compare results from this study to those of a 1-month study conducted in 2004. The total population of the Sabangau catchment is estimated to be about in the tens of thousands, though numbers, distribution and density for the different forest subtypes vary considerably. We propose that future density surveys of gibbons must include data from all forest subtypes where gibbons are found and that extrapolating from one forest subtype is likely to yield inaccurate density and population estimates. We also propose that auditory census be carried out by using at least three listening posts (LP) in order to increase the area sampled and the chances of hearing groups. Our results suggest that the Sabangau catchment contains one of the largest remaining contiguous populations of Bornean agile gibbon.

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References

  1. Bodmer RE, Mather R, Chivers DJ (1991) Rain forests of central Borneo—threatened by modern development. Oryx 25(1):21–26

    Google Scholar 

  2. Brockelman WY, Ali R (1987) Methods of surveying and sampling forest primate populations. In: Mittermeier RA, Marsh Primate RW (eds) Conservation in the tropical rainforest. Alan Liss, New York, pp 23–62

    Google Scholar 

  3. Brockelman WY, Srikosamatara S (1984) Maintenance and evolution of social structure in gibbons. In: Preuschoft H, Chivers DJ, Brockelman WY, Creel N (eds) The lesser apes: evolutionary and behavioural biology. Edinburgh University Press, Edinburgh, pp 298–323

    Google Scholar 

  4. Brockelman WY, Srikosamatara S (1993) Estimation of density of gibbon groups by use of loud songs. Am J Primatol 29(2):93–108

    Article  Google Scholar 

  5. Brockelman WY, Ross BA, Pantuwatana S (1974) Social interactions of adult gibbons (Hylobates lar) in an experimental colony. Gibbon & Siamang 3:137–156

    Google Scholar 

  6. Buckley C, Nekaris KAI, Husson SJ (2006) Survey of Hylobates agilis albibarbis in a logged peat swamp forest: Sabangau catchment, Central Kalimantan—primates online first. doi:10.1007/s10329-006-0195-7

  7. Caldecott JO, Haimoff EH (1983) Female solo singing by a wild lar gibbon in peninsular Malaysia. Malays Nat J 36(3):167–173

    Google Scholar 

  8. Cheyne SM (2007) Gibbon song: effects of climate, location and human disturbance on the singing apes. Am J Primatol (in press)

  9. Cheyne SM, Chivers DJ, Sugardjito J (2007) Covariation in the great calls of rehabilitant and wild gibbons Hylobates agilis albibarbis . Raffles Bull Zool 55(1):213–219

    Google Scholar 

  10. Chivers DJ (1974) The Siamang in Malaya: a field study of a primate in tropical rainforest. Karger, Basel

  11. Chivers DJ (1977) The ecology of gibbons: some preliminary considerations based on observations in the Malay Peninsula. In: Prasad MRN, Anand Kumar TC (eds) The use of non-human primates in biomedical research. Indian Science Research Academy, New Dehli, pp 85–105

    Google Scholar 

  12. Cowlishaw G (1992) Song function in gibbons. Behaviour 121(1–2):131–153

    Google Scholar 

  13. Haimoff EH, Xiao-Yun Y, Swing-Yin H, Nan C (1987) Conservation of gibbons in Yunnan Province, China. Oryx 21(3):168–173

    Google Scholar 

  14. Husson S, McLardy C, Morrogh-Bernard H, D’arcy L, Limin S (2007) The compression effect and orangutan population decline in the Sebangau peat swamp forest 1996–2003. Biol Conserv (in press)

  15. IFFM (1998) Fires in East Kalimantan in 1998. Summary and results of the NOAA-AVHRR data. Jakarta, International conference on data management and modeling using remote sensing and GIS for tropical land inventory. http://www.fire.uni-freiburg.de/iffn/country/id/id_9.htm

  16. Johns AD (1989) Recovery of a Peninsular Malaysia rainforest avifauna following selective timber logging: the first twelve years. Forktail 4:89–105

    Google Scholar 

  17. Mitani JC (1985) Responses of gibbons (H. muelleri) to self, neighbour and stranger song duets. Int J Primatol 6(2):193–200

    Article  Google Scholar 

  18. Morrogh-Bernard H, Husson S, Page SE, Rieley JO (2003) Population status of the Bornean orang-utan (Pongo pygmaeus) in the Sebangau peat swamp forest, Central Kalimantan, Indonesia. Biol Conserv 110:141–52

    Article  Google Scholar 

  19. Nijman V (2004) Conservation of the Javan gibbon Hylobates moloch: population estimates, local extinctions and conservation priorities. Raffles Bull Zool 51(1):271–280

    Google Scholar 

  20. Nijman V, van Balen S (1998) A faunal survey of the Dieng Mountains, Central Java, Indonesia: distribution and conservation of endemic species. Oryx 32(2):145–156

    Article  Google Scholar 

  21. Nijman V, Menken SBJ (2005) Assessment of census techniques for estimating density and biomass of gibbons (primates: Hylobatidae). Raffles Bull Zool 53(1):169–179

    Google Scholar 

  22. O’Brien TG, Kinnaird MF, Nurcahyo A, Iqbal M, Rusmanto M (2004) Abundance and distribution of sympatric gibbons in a threatened Sumateran rainforest. Int J Primatol 25(2):267–284

    Article  Google Scholar 

  23. Page SE, Rieley JO, Shotyk ØW, Weiss D (1999) Interdependence of peat and vegetation in a tropical peat swamp forest. Philos Trans R Soc Lond B 354:1885–1807

    Article  CAS  Google Scholar 

  24. Raemaekers JJ, Raemaekers PM (1984) The ooaa duet of the gibbon (Hylobates lar): a group call which triggers other groups to respond in kind. Folia Primatol 42:209–215

    Article  Google Scholar 

  25. Supriatna J, Tilson R, Gurmaya KJ, Manansang J, Wardojo W, Sriyanto A, Teare AKC, Seal U (eds) (1994) Javan Gibbon and Javan langur: Population and Habitat Viability Analysis Report. IUCN/SSC Conservation Breeding Specialist Group. Apple Valley, Minnesota, IUCN

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Acknowledgments

We thank the management and staff of the Centre for International Cooperation in Management of Tropical Peatland (CIMTROP) and the University of Palangka Raya for permission to work at the LAHG and for logistical assistance throughout the course of this study. SMC thanks LIPI (Indonesian Institute of Sciences) for permission to conduct research in Indonesia. Special thanks to Laura L.B. Graham for her help in devising the Excel mapping programme. Thanks to the project behaviour team (Ari, Ciscoes, Iwan, Santi, Thomas, Twenti, Yudhi and Zery), Simon Husson and Helen Morrogh-Bernard, the OuTrop research team and volunteers for invaluable assistance with data collection. The authors thank Mark Harrison, Simon Husson, David J. Chivers, Warren Brockelman, Jatna Supriatna and an anonymous reviewer for comments on this manuscript. Funding was provided by Primate Conservation Inc, the Cambridge Philosophical Society and the Orang-utan Tropical Peatland Project (OuTrop).

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Correspondence to Susan M. Cheyne.

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Cheyne, S.M., Thompson, C.J.H., Phillips, A.C. et al. Density and population estimate of gibbons (Hylobates albibarbis) in the Sabangau catchment, Central Kalimantan, Indonesia. Primates 49, 50–56 (2008). https://doi.org/10.1007/s10329-007-0063-0

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Keywords

  • Bornean agile gibbon
  • Population density
  • Quadrangulation sampling
  • Sabangau catchment
  • Peat-swamp forest