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Providing evidence to improve practice

Individual study: First field data on the Laotian black crested gibbon (Nomascus concolor lu) of the Nam Kan area of Laos

Published source details

Geissmann T. (2007) First field data on the Laotian black crested gibbon (Nomascus concolor lu) of the Nam Kan area of Laos. Gibbon Journal, 3, 56-65


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Strengthen/support/re-install traditions/taboos that forbid the killing of primates Primate Conservation

A site comparison in 2007 in tropical forest in Nam Kan Valley in Nam Kan Provincial Protected Area, Laos found that Laotian black crested gibbons Nomascus concolor lu that were protected by a local hunting taboo occurred at higher group densities compared to other sites. In the survey area, average group density was estimated at 2.2 groups/km2 compared to 0.43 to 0.82 and 1.6 groups/km2 in Yunnan Province and Che Tao in northern Vietnam, respectively. However, no statistical tests were carried out to determine whether this difference was significant. The ban was implemented in 1975 by one of the local village heads. In Yunnan Province and Che Tao no hunting bans were reported to exist. An auditory survey was conducted in the survey area using eight single listening points stationed roughly 0.5-2 km apart, each of which were used on one to five days.