Title
Chapter Title: Abundance annex: Ape population abundance estimates
Book Title: State of the Apes 2013: Extractive Industries and Ape Conservation.
Author(s)
Funwi-Gabga, N.; Cheyne, S.M.; Kühl, H.S.; Maisels, F.G.; Wich, S.A.; Williamson, E.A.
Published
2014
Abstract
In this annex, ape abundance estimates are presented at site level, where “site” is a protected area and its buffer zone, or a logging concession or group of concessions, or any discrete area where a survey has taken place in the last two decades (a few sites were last surveyed in the 1980s). Most of the abundance estimates presented come from documented material (both peer-reviewed publications and gray literature); some have been reconfirmed by experts in the field. Records of absolute ape numbers rarely exist; therefore, providing absolute figures in this report would be misleading. Instead, abundance classes covering a population range are given unless otherwise stated (for example, actual estimates for orangutan populations are taken from Wich et al., 2008). Abundance classes are defined in Table 1. The list of ape sites in these tables is not in any way exhaustive and updates (to both sites and survey data) will be made available in digital format via the A.P.E.S. Portal (http://apesportal.eva.mpg.de).
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