Aerial Surveys Give New Estimates for Orangutans in Sabah, Malaysia Export

@article{citeulike:1049067, abstract = {Great apes are threatened with extinction, but precise information about the distribution and size of most populations is currently lacking. We conducted orangutan nest counts in the Malaysian state of Sabah (North Borneo), using a combination of ground and helicopter surveys, and provided a way to estimate the current distribution and size of the populations living throughout the entire state. We show that the number of nests detected during aerial surveys is directly related to the estimated true animal density and that a helicopter is an efficient tool to provide robust estimates of orangutan numbers. Our results reveal that with a total estimated population size of about 11,000 individuals, Sabah is one of the main strongholds for orangutans in North Borneo. More than 60\&\#37; of orangutans living in the state occur outside protected areas, in production forests that have been through several rounds of logging extraction and are still exploited for timber. The role of exploited forests clearly merits further investigation for orangutan conservation in Sabah.}, author = {Ancrenaz, Marc and Gimenez, Olivier and Ambu, Laurentius and Ancrenaz, Karine and Andau, Patrick and Goossens, Beno\&\#238;t and Payne, John and Sawang, Azri and Tuuga, Augustine and Lackman-Ancrenaz, Isabelle}, citeulike-article-id = {1049067}, citeulike-linkout-0 = {http://dx.doi.org/10.1371/journal.pbio.0030003}, day = {1}, doi = {10.1371/journal.pbio.0030003}, journal = {PLoS Biology}, keywords = {aerial\_photos, great\_apes, malaysia, nests, orangutans, pongo-pygmaeus, remote\_sensing, sabah}, month = {January}, number = {1}, pages = {e3+}, posted-at = {2007-01-18 17:36:12}, priority = {2}, title = {Aerial Surveys Give New Estimates for Orangutans in Sabah, Malaysia}, url = {http://dx.doi.org/10.1371/journal.pbio.0030003}, volume = {3}, year = {2005} }

TY - JOUR ID - citeulike:1049067 L3 - citeulike-article-id:1049067 N2 - Great apes are threatened with extinction, but precise information about the distribution and size of most populations is currently lacking. We conducted orangutan nest counts in the Malaysian state of Sabah (North Borneo), using a combination of ground and helicopter surveys, and provided a way to estimate the current distribution and size of the populations living throughout the entire state. We show that the number of nests detected during aerial surveys is directly related to the estimated true animal density and that a helicopter is an efficient tool to provide robust estimates of orangutan numbers. Our results reveal that with a total estimated population size of about 11,000 individuals, Sabah is one of the main strongholds for orangutans in North Borneo. More than 60% of orangutans living in the state occur outside protected areas, in production forests that have been through several rounds of logging extraction and are still exploited for timber. The role of exploited forests clearly merits further investigation for orangutan conservation in Sabah. IS - 1 JF - PLoS Biology TI - Aerial Surveys Give New Estimates for Orangutans in Sabah, Malaysia VL - 3 SP - e3 KW - aerial_photos KW - great_apes KW - malaysia KW - nests KW - orangutans KW - pongo-pygmaeus KW - remote_sensing KW - sabah AU - Ancrenaz, Marc AU - Gimenez, Olivier AU - Ambu, Laurentius AU - Ancrenaz, Karine AU - Andau, Patrick AU - Goossens, Benoît AU - Payne, John AU - Sawang, Azri AU - Tuuga, Augustine AU - Lackman-Ancrenaz, Isabelle PY - 2005/01/01/ UR - http://dx.doi.org/10.1371/journal.pbio.0030003 ER -