Declining orangutan encounter rates from Wallace to the present suggest the species was once more abundant
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Meijaard, Erik; Welsh, Alan; Ancrenaz, Marc; Wich, Serge; Nijman, Vincent; Marshall, Andrew J.
Description
BACKGROUND Bornean orangutans (Pongo pygmaeus) currently occur at low densities and seeing a wild one is a rare event. Compared to present low encounter rates of orangutans, it is striking how many orangutan each day historic collectors like Alfred Russel Wallace were able to shoot continuously over weeks or even months. Does that indicate that some 150 years ago encounter rates with orangutans, or their densities, were higher than now? METHODOLOGY/PRINCIPAL FINDINGS We test this hypothesis by...[Show more]
Collections | ANU Research Publications |
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Date published: | 2010-08-11 |
Type: | Journal article |
URI: | http://hdl.handle.net/1885/16730 |
Source: | PLoS ONE |
DOI: | 10.1371/journal.pone.0012042 |
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01_Meijaard_Declining_orangutan_encounter_2010.pdf | Published Version | 573.49 kB | Adobe PDF |
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