Demographic status of Komodo dragons populations in Komodo National Park

Purwandana, Deni, Ariefiandy, Achmad, Imansyah, M. Jeri, Rudiharto, Heru, Seno, Aganto, Ciofi, Claudio, Fordham, Damien A. and Jessop, Tim S. 2014, Demographic status of Komodo dragons populations in Komodo National Park, Biological conservation, vol. 171, pp. 29-35, doi: 10.1016/j.biocon.2014.01.017.

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Title Demographic status of Komodo dragons populations in Komodo National Park
Author(s) Purwandana, Deni
Ariefiandy, Achmad
Imansyah, M. Jeri
Rudiharto, Heru
Seno, Aganto
Ciofi, Claudio
Fordham, Damien A.
Jessop, Tim S.ORCID iD for Jessop, Tim S. orcid.org/0000-0002-7712-4373
Journal name Biological conservation
Volume number 171
Start page 29
End page 35
Total pages 7
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2014-03
ISSN 0006-3207
Summary The Komodo dragon (Varanus komodoensis) is the world's largest lizard and endemic to five islands in Eastern Indonesia. The current management of this species is limited by a paucity of demographic information needed to determine key threats to population persistence. Here we conducted a large scale trapping study to estimate demographic parameters including population growth rates, survival and abundance for four Komodo dragon island populations in Komodo National Park. A combined capture mark recapture framework was used to estimate demographic parameters from 925 marked individuals monitored between 2003 and 2012. Island specific estimates of population growth, survival and abundance, were estimated using open population capture-recapture analyses. Large island populations are characterised by near or stable population growth (i.e. λ~. 1), whilst one small island population (Gili Motang) appeared to be in decline (λ= 0.68 ± 0.09). Population differences were evident in apparent survival, with estimates being higher for populations on the two large islands compared to the two small islands. We extrapolated island specific population abundance estimates (considerate of species habitat use) to produce a total population abundance estimate of 2448 (95% CI: 2067-2922) Komodo dragons in Komodo National Park. Our results suggest that park managers must consider island specific population dynamics for managing and recovering current populations. Moreover understanding what demographic, environmental or genetic processes act independently, or in combination, to cause variation in current population dynamics is the next key step necessary to better conserve this iconic species.
Language eng
DOI 10.1016/j.biocon.2014.01.017
Field of Research 060801 Animal Behaviour
060201 Behavioural Ecology
060207 Population Ecology
05 Environmental Sciences
06 Biological Sciences
07 Agricultural And Veterinary Sciences
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30081777

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