Changes to Sabah's orangutan population in recent times: 2002-2017.
PLoS One
; 14(7): e0218819, 2019.
Article
in En
| MEDLINE
| ID: mdl-31314781
ABSTRACT
The Bornean orangutan is critically endangered and monitoring its population is needed to inform effective conservation management. In this paper, we present results of 2014-17 aerial nest surveys of the major orangutan populations in Sabah and compare them with baseline data produced during surveys conducted in 2002-03 using similar methods. Our results show three important points a) by increasing the survey effort (estimated at 15-25% cover), sparsely scattered orangutan sub-populations not recorded in the previous aerial surveys were located and the accuracy of the nest count estimates is expected to improve; b) large populations in the interior forests of Sabah, occupying sustainably managed logged and unlogged forests, have been stable over 15 years and are of vital importance for the species' conservation; c) fragmented populations located in eastern Sabah, that are surrounded by extensive oil palm plantations, have declined at varying rates.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Pongo pygmaeus
/
Ecosystem
/
Conservation of Natural Resources
Limits:
Animals
Country/Region as subject:
Asia
Language:
En
Journal:
PLoS One
Journal subject:
CIENCIA
/
MEDICINA
Year:
2019
Document type:
Article
Affiliation country:
Malaysia