Skip to main content
×
Home
    • Aa
    • Aa
  • Access
  • Cited by 1
  • Cited by
    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Spehar, Stephanie N. Loken, Brent Rayadin, Yaya and Royle, J. Andrew 2015. Comparing spatial capture–recapture modeling and nest count methods to estimate orangutan densities in the Wehea Forest, East Kalimantan, Indonesia. Biological Conservation, Vol. 191, p. 185.


    ×

Opportunistic behaviour or desperate measure? Logging impacts may only partially explain terrestriality in the Bornean orang-utan Pongo pygmaeus morio

  • Brent Loken (a1), Chandradewana Boer (a2) and Nunuk Kasyanto (a3)
  • DOI: http://dx.doi.org/10.1017/S0030605314000969
  • Published online: 22 January 2015
Abstract
Abstract

There is a lack of information on how the Endangered Bornean orang-utan Pongo pygmaeus morio moves through its environment. Here we report on a camera-trapping study carried out over 2.5 years to investigate the orang-utan's terrestrial behaviour in Wehea Forest, East Kalimantan, Indonesia. We set 41 camera trap stations in an area of secondary forest, 36 in recently logged forest immediately adjacent to Wehea Forest, and 20 in an area of primary forest in the heart of Wehea Forest. A combined sampling effort of 28,485 trap nights yielded 296 independent captures of orang-utans. Of the three study sites, orang-utans were most terrestrial in recently logged forest, which may be only partially explained by breaks in the canopy as a result of logging activity. However, orang-utans were also terrestrial in primary forest, where there was a closed canopy and ample opportunity for moving through the trees. Our results indicate that orang-utans may be more terrestrial than previously thought and demonstrate opportunistic behaviour when moving through their environment, including using newly constructed logging roads for locomotion, possibly indicating some degree of resilience to human disturbance. This finding is important because of the potential role of sustainably logged forests for orang-utan conservation.

  • View HTML
    • Send article to Kindle

      To send this article to your Kindle, first ensure coreplatform@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Opportunistic behaviour or desperate measure? Logging impacts may only partially explain terrestriality in the Bornean orang-utan Pongo pygmaeus morio
      Your Kindle email address
      Available formats
      ×
      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your Dropbox account. Find out more about sending content to Dropbox.

      Opportunistic behaviour or desperate measure? Logging impacts may only partially explain terrestriality in the Bornean orang-utan Pongo pygmaeus morio
      Available formats
      ×
      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your Google Drive account. Find out more about sending content to Google Drive.

      Opportunistic behaviour or desperate measure? Logging impacts may only partially explain terrestriality in the Bornean orang-utan Pongo pygmaeus morio
      Available formats
      ×
Copyright
Corresponding author
(Corresponding author) E-mail brentloken@gmail.com
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

M. Ancrenaz , L. Ambu , I. Sunjoto , E. Ahmad , K. Manokaran , E. Meijaard & I. Lackman (2010) Recent surveys in the forests of Ulu Segama Malua, Sabah, Malaysia, show that orang-utans (P.p. morio) can be maintained in slightly logged forests. PLoS ONE, 5(7), e11510.

M. Ancrenaz , R. Sollmann , E. Meijaard , A.J. Hearn , J. Ross , H. Samejima et al. (2014) Coming down from the trees: Is terrestrial activity in Bornean orangutans natural or disturbance driven? Scientific Reports, 4, 4024.

M.E. Hardus , A.R. Lameira , S.B.J. Menken & S.A. Wich (2012) Effects of logging on orangutan behaviour. Biological Conservation, 146, 177187.

E. Knop , P.I. Ward & S.A. Wich (2004) A comparison of orang-utan density in a logged and unlogged forest on Sumatra. Biological Conservation, 120, 183188.

B. Loken , S. Spehar & Y. Rayadin (2013) Terrestriality in the Bornean orangutan (Pongo pygmaeus morio) and implications for their ecology and conservation. American Journal of Primatology, 75, 11291138.

J. MacKinnon (1974) The behaviour and ecology of wild orang-utans (Pongo pygmaeus). Animal Behaviour, 22, 374.

E. Meijaard , G. Albar , Nardiyono, Y. Rayadin , M. Ancrenaz & S. Spehar (2010) Unexpected ecological resilience in Bornean orangutans and implications for pulp and paper plantation management. PLoS ONE, 5(9), e12813.

H.D. Rijksen & E. Meijaard (1999) Our Vanishing Relative: The Status of Wild Orang-utans at the Close of the Twentieth Century. Kluwer Academic Publishers, Dordrecht, Netherlands.

S.A. Wich , D. Gaveau , N. Abram , M. Ancrenaz , A. Baccini , S. Brend et al. (2012) Understanding the impacts of land-use policies on a threatened species: Is there a future for the Bornean orang-utan? PLoS ONE, 7(11), e49142.

H.B. Wilson , E. Meijaard , O. Venter , M. Ancrenaz & H.P. Possingham (2014) Conservation strategies for orangutans: reintroduction versus habitat preservation and the benefits of sustainably logged forest. PLoS ONE, 9(7), e102174.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Oryx
  • ISSN: 0030-6053
  • EISSN: 1365-3008
  • URL: /core/journals/oryx
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords: