The status of southern white-cheeked gibbon<i> (Nomascus siki) </i>   in Truong Son key biodiversity area

Nguyen Dinh Duy; Dang Ngoc Can; Le Trong Trai; Le Van Ninh; Tran Dang Hieu; Ha Van Nghia; Trinh Thi Mai; Ly Ngoc Tu

doi:10.15625/0866-7160/v42n1.14762

Author affiliations

Authors

Nguyen Dinh Duy Institute of Ecology and Biological Resources https://orcid.org/0000-0002-9593-2040
Dang Ngoc Can
Le Trong Trai
Le Van Ninh
Tran Dang Hieu
Ha Van Nghia
Trinh Thi Mai
Ly Ngoc Tu

DOI:

https://doi.org/10.15625/0866-7160/v42n1.14762

Keywords:

Biodiversity area, southern white-cheeked gibbon, distribution, Truong Son range, Laos, Vietnam.

Abstract

The Southern white-cheeked crested gibbon, Nomascus siki, is an endemic primate to Vietnam and Laos, and has been identified as a nationally and globally endangered species (EN). However, little information is known on the status of the species in Vietnam generally and in the Truong Son key biodiversity area (Truong Son KBA) particularly. In order to explore the current status of the species in the Truong Son KBA, we conducted field surveys in 2018 and 2019. Analysis of the survey data shows 149 groups of gibbon in the 4 study areas. Combined with results of similar-techniqued survey in 2016 on the same species in Khe Nuoc Trong forest, we identified at least 252 gibbon groups and estimated 425 gibbon groups in the entire Truong Son KBA. These gibbon groups are mainly distributed in medium-rich evergreen closed forests in mountainous areas of the west Truong Son KBA, adjacent to the Vietnam-Laos border.

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References

Brockelman W.Y., Ali R., 1987. Methods of surveying and sampling forest primate populations; pp 23–62. In: Marsh CW & Mittermeier RA (eds): Primate Conservation in the Tropical Rainforest. Alan R. Liss Inc., New York.

Brockelman W.Y., Srikosamatara S., 1993. Estimating density of gibbon groups by use of the loud songs. Am. J. Primatol. 29, 93–108.

CITES, 2019. Convention on International Trade in Endangered Species of Wild Fauna and Flora. Version 2019-11. . Downloaded on 30 November 2019.

Cowlishaw G., Dunbar R., 2000. Primate Conservation Biology. University of Chicago Press: Chicago. 498 pp. ISBN 0-226-11637-9.

Critical Ecosystem Partnership Fund (CEPF), 2012. Indo-Burma Biodiversity Hotspot. Washington, DC, 381 pp

Dang Ngoc Can, Le Van Cham, Trinh Viet Cuong, Ngo Xuan Tuong, Le Manh Tuan, 2012. Report: The Biodiversity and Forest Ecosystem Services Assessment of Truong Son Important Bird Area, Quang Binh and Quang Tri Provinces, Vietnam. BirdLife International Vietnam Programme.

Dang Ngoc Can, Nguyen Dinh Duy, Le Trong Trai, Le Van Ninh, Le Quoc Hieu, Tran Dang Hieu, 2017. Status survey of southern white-cheeked gibbon (Nomascus siki) in proposed Khe Nuoc Trong nature reserver, Le Thuy district, Quang Binh province. The 7-th National Conference on Ecology and Biological Resources, Ha Noi, 2017: 583–589.

Decree No. 06/ND-CP of the Prime Minister, 2019. Provisions on management and the List of endangered, precious and rare forest plants and animals from Vietnam's forests.

Geissmann T., 1993. Evolution of communication in gibbons (Hylobatidae). PhD thesis, Anthropological Institute, Zürich University, Switzerland.

Geissmann T., 1994. Systematik der Gibbons. Zeitschrift des Kölner Zoo 37: 65–77 (German text, English abstract).

Geiissmann T., 1995. Gibbon systematics and species identification. International Zoo News 42: 467–501.

Geissmann T., 2007. Status reassessment of the gibbons: results of the Asian primate red list workshop 2006. Gibbon Journal 3: 5−15.

Geissmann T., Nguyen Xuan Dang, Lormée N., Momberg F., 2000. Vietnam Primate Conservation Status Review 2000, Part 1: Gibbons. Fauna and Flora International – Indochina Programme, Ha Noi.

Geissmann T., Orgeldinger M., 2000. The relationship between duet songs and pair bonds in siamangs, Hylobates syndactylus. Animal Behavior 60, 805–809.

GLAD-UMD and SERVIRMekong, 2017. National annual tree canopy structure and surface water dynamics products. Available at https://glad.umd.edu/sites/default/files/Vietnam National_Data_Description.pdf, assessed on May/2019 https://glad.umd.edu/sites/default/files/Vietnam National_Data_Description.pdf, assessed on May/2019">

Groves C. P., 2001. Primate Taxonomy, Smitsonian Institution Press, Washington and London, 350 pages.

Haus T., Vogt M., Forster B., Vu Ngoc Thanh, Ziegler T., 2009. Distribution and population densities of diurnal primates in the karst forests of Phong Nha-Ke Bang National Park, Quang Binh Province, central Vietnam. International Journal of Primatology 30: 301–312.

International Union for Conservation of Nature 2019. Nomascus siki. The IUCN Red List of Threatened Species. Version 2019-3.

Jiang X. L., Luo Z.H., Zhao S. Y., 2006. Status and distribution patterns of black crested gibbon (Nomascus concolor jingdongensis) in Wulian Mountains, Yunnan, China: Implications for conservation. Primates 47: 264−271.

Le Khac Quyet, 2004. A preliminary survey of primates in Nui Giang Man area, Quang Binh Province, central Vietnam. Pages 45−51 in T. Nadler, U. Streicher, and Ha Thang Long, editors. Conservation of Primates in Vietnam. Frankfurt Zoological Society, Ha Noi, Vietnam.

Le Manh Hung, Pham Duc Tien, Tordoff A. W., Nguyen Dinh Dung, 2002. Report: A rapid field survey of Le Thuy and Quang Ninh Districts, Quang Binh Province, Vietnam. BirdLife International Vietnam Programme, Ha Noi, Vietnam.

Le Trong Dat, Do Tuoc, Dinh Huy Tri, L. T. Dinh and Dang Ngoc Kien, 2009. Report: Census of southern white-cheeked crested gibbons in U Bo and adjacent bufferzone forests, Phong Nha-Ke Bang National Park, Bo Trach District, Quang Binh Province, Vietnam. Fauna & Flora International Vietnam Programme,

Ha Noi, Vietnam.

Le Trong Dat, Le Thien Duc, 2006. Report on a biodiversity survey for vertebrate fauna in Truong Son State Forest Enterprise, Quang Ninh District, Quang Binh Province. Tropical Forest Trust Indochina Programme, Ha Noi, Vietnam.

Ministry of Science and Technology & Vietnamese Academy of Science and Technology (2007): Vietnam Red Data Book, Part I. Animals. Publishing House for Science and Technology.

Mootnick A. R., 2006. Gibbon (Hylobatidae) species identification recommended for rescue or breeding centers. Primate Conservation 21: 103−138.

Mootnick, A. R., Fan Pengfei, 2011