The Distribution of White-Cheeked Gibbons <i>Nomascus siki</i> and <i>N. leucogenys</i> in Central Lao PDR

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

The Distribution of White-Cheeked Gibbons <i>Nomascus siki</i> and <i>N. leucogenys</i> in Central Lao PDR

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

The Distribution of White-Cheeked Gibbons <i>Nomascus siki</i> and <i>N. leucogenys</i> in Central Lao PDR

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10614 - Behavioral sciences biology

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

INTERNATIONAL JOURNAL OF PRIMATOLOGY

ISSN

0164-0291

e-ISSN

1573-8604

Svazek periodika

46

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

20

Strana od-do

664-683

Kód UT WoS článku

001443023400001

EID výsledku v databázi Scopus

2-s2.0-105000032614