Short Communications

Will current conservation responses save the Critically Endangered Sumatran rhinoceros Dicerorhinus sumatrensis?

Rasmus Gren Havmøllera1, Junaidi Paynea2, Widodo Ramonoa3, Susie Ellisa4, K. Yogananda5, Barney Longa6, Eric Dinersteina6, A. Christy Williamsa7, Rudi H. Putraa8 *, Jamal Gawia9, Bibhab Kumar Talukdara10  and Neil Burgessa11 

a1 Natural History Museum of Denmark, Centre for Macroecology, Evolution & Climate, Copenhagen, Denmark

a2 Borneo Rhino Alliance (BORA), Kota Kinabalu, Sabah, Malaysia

a3 Yayasan Badak Indonesia, Bogor, Java, Indonesia

a4 International Rhino Foundation, Strasburg, Virginia, USA

a5 WWF–Malaysia, Kota Kinabalu, Sabah, Malaysia

a6 WWF, Washington, DC, USA

a7 WWF–International, Gland, Switzerland

a8 Leuser Conservation Forum, Banda Aceh, Aceh, Indonesia

a9 Leuser International Foundation, Banda Aceh, Aceh, Indonesia

a10 IUCN Species Survival Commission Asian Rhino Specialist Group, Guwahati, Assam, India

a11 United Nations Environment Programme World Conservation Monitoring Centre, Cambridge, UK

Abstract

The Critically Endangered Sumatran rhinoceros Dicerorhinus sumatrensis formerly ranged across South-east Asia. Hunting and habitat loss have made it one of the rarest large mammals and the species faces extinction despite decades of conservation efforts. The number of individuals remaining is unknown as a consequence of inadequate methods and lack of funds for the intensive field work required to estimate the population size of this rare and solitary species. However, all information indicates that numbers are low and declining. A few individuals persist in Borneo, and three tiny populations remain on the Indonesian island of Sumatra and show evidence of breeding. Rhino Protection Units are deployed at all known breeding sites but poaching and a presumed low breeding rate remain major threats. Protected areas have been created for the rhinoceros and other in situ conservation efforts have increased but the species has continued to go locally extinct across its range. Conventional captive breeding has also proven difficult; from a total of 45 Sumatran rhinoceros taken from the wild since 1984 there were no captive births until 2001. Since then only two pairs have been actively bred in captivity, resulting in four births, three by the same pair at the Cincinnati Zoo and one at the Sumatran Rhino Sanctuary in Sumatra, with the sex ratio skewed towards males. To avoid extinction it will be necessary to implement intensive management zones, manage the metapopulation as a single unit, and develop advanced reproductive techniques as a matter of urgency. Intensive census efforts are ongoing in Bukit Barisan Selatan but elsewhere similar efforts remain at the planning stage.

(Received January 04 2015)

(Revised February 26 2015)

(Accepted March 20 2015)

(Online publication August 03 2015)

Keywords

  • Conservation planning;
  • Critically Endangered;
  • extinction;
  • advanced reproductive technology;
  • intensive management zones;
  • metapopulation management;
  • Sumatran rhino;
  • South-east Asia

Footnotes

*  Also at: Tropical Biodiversity Conservation, Bogor Agricultural University, Bogor, Indonesia

  Also at: International Rhino Foundation, Strasburg, Virginia, USA

  Also at: Natural History Museum of Denmark, Centre for Macroecology, Evolution & Climate, Copenhagen, Denmark

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