Field report on the Hainan gibbon

  • Published source details Zhenhe L., Haisheng J., Yongzu Z., Yanhua L., Tigon C., Manry D. & Southwick C. (1987) Field report on the Hainan gibbon. Primate Conservation, 8, 49-50.


This study is summarised as evidence for the following.

Action Category

Legally protect primate habitat

Action Link
Primate Conservation
  1. Legally protect primate habitat

    A before-and-after trial in 1978-1987 in tropical montane forest on Hainan Island, China found that the population of the Hainan gibbon Hylobates concolor hainanus increased from 7-8 individuals to 22 gibbons (34% increase) over nine years after the area was proclaimed the Bawanglin Nature Reserve. However, no statistical tests were carried out to determine whether this increase was significant. The total breeding population consisted of four adult males and seven adult females. In 1980, an area of 13 km2 was declared protected from hunting and logging activities. Three of the four remaining groups had a composition that was unusual for this species; they consisted of one adult male and two adult females with 2-4 young per group. The authors suggested that this may be a result of the small size of the group’s habitat, which may have encouraged individuals to remain in their natal group instead of dispersing to establish new territories.

Output references
What Works 2021 cover

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 21

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape ProgrammeRed List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Mauritian Wildlife Supporting Conservation Leaders
Sustainability Dashboard National Biodiversity Network Frog Life The international journey of Conservation - Oryx Cool Farm Alliance UNEP AWFA Bat Conservation InternationalPeople trust for endangered species Vincet Wildlife Trust