The Distribution of White-Cheeked Gibbons <i>Nomascus siki</i> and <i>N. leucogenys</i> in Central Lao PDR
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F25%3A102764" target="_blank" >RIV/60460709:41210/25:102764 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1007/s10764-025-00491-5" target="_blank" >https://doi.org/10.1007/s10764-025-00491-5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10764-025-00491-5" target="_blank" >10.1007/s10764-025-00491-5</a>
Alternative languages
Result language
angličtina
Original language name
The Distribution of White-Cheeked Gibbons <i>Nomascus siki</i> and <i>N. leucogenys</i> in Central Lao PDR
Original language description
Identifying genetically unique primate populations is crucial for guiding conservation efforts. The northern white-cheeked gibbon Nomascus leucogenys and southern white-cheeked gibbon Nomascus siki have restricted global ranges and are endemic to Lao PDR and Vietnam. However, the boundary between the two species in central Lao PDR is unclear. It has been hypothesized that the Nam Theun-Nam Kading River is the major geographical barrier between the two species. To investigate the distribution of N. siki and N. leucogenys, we analyzed 90 gibbon songs, known to be species-specific, from sites in central Lao PDR and Vietnam. We also analyzed 32 recordings of gibbons in European zoological facilities that were known to represent each species, based on karyotype. Overall, the recordings included 737 male calls and 229 female calls. In the captive gibbon recordings, we found a statistically significant difference between the species in 12 acoustic parameters for males and in 10 acoustic parameters for females. We used these acoustic parameters for both males and females as training data to perform a Random Forest species classification analysis of vocal recordings of unidentified species from the wild. Our classification accuracy was 97% for males and 89% for females. We detected both Nomascus siki and N. leucogenys on both sides of the Nam Theun-Nam Kading River in Nakai-Nam Theun National Park and surrounding areas in Central Lao PDR and Vietnam. These results do not support the hypothesis that the Nam Theun-Nam Kading River is a geographical barrier between the two species in central Lao PDR, which was based on a few samples from central Lao PDR, and none from Nakai-Nam Theun National Park. These findings must be taken into consideration as part of potential reintroduction, rehabilitation or translocation programs for both species in this region.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10614 - Behavioral sciences biology
Result continuities
Project
—
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
INTERNATIONAL JOURNAL OF PRIMATOLOGY
ISSN
0164-0291
e-ISSN
1573-8604
Volume of the periodical
46
Issue of the periodical within the volume
3
Country of publishing house
CZ - CZECH REPUBLIC
Number of pages
20
Pages from-to
664-683
UT code for WoS article
001443023400001
EID of the result in the Scopus database
2-s2.0-105000032614