Warren Y Brockelman
Biographic Data
| ID | 3452579 |
|---|---|
| NAME | Warren Y Brockelman |
| GIVEN NAMES | Warren Y |
| FAMILY NAME | Brockelman |
| SIGNATURE | BROCKELMAN W Y |
| AFFILIATIONS | Mahidol University |
| ORCID | 0000-0002-8649-1984 |
| VERIFIED | Yes |
| TOTAL WORKS | 16 |
| TOTAL CITATIONS | 5 |
| WORKS AS AUTHOR | 16 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1973 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 1 |
My journey into primatology
Estimation of White‐Handed Gibbon Density and Population Size in Huai Kha Khaeng Wildlife Sanctuary, Western Thailand
All 20 gibbon species (Hylobatidae) are listed as Threatened or Endangered on the IUCN Red List. The four species of gibbons occurring in Thailand survive only in well‐protected forests and need to be effectively monitored for conservation management. Because of their habit of duetting and living in small‐group territories, gibbons are usually surveyed using acoustic methods employing point counts. We surveyed the white‐handed gibbon ( Hylobates …
What are they eating?
Genetic analysis of hybridization between white-handed (Hylobates lar) and pileated (Hylobates pileatus) gibbons in a contact zone in Khao Yai National Park, Thailand
Comparison of point transect distance and traditional acoustic point‐count sampling of hoolock gibbons in Htamanthi Wildlife Sanctuary, Myanmar
Effective conservation demands more accurate and reliable methods of survey and monitoring of populations. Surveys of gibbon populations have relied mostly on mapping of groups in “listening areas” using acoustical point‐count data. Traditional methods of estimating density in have usually used counts of gibbon groups within fixed‐radius areas or areas bounded by terrain barriers to sound transmission, and have not accounted for possible decline …
Infant loss during and after male replacement in gibbons
According to the sexual selection hypothesis, infanticide during resident male replacement is an adaptive strategy that has evolved because the killing of unweaned offspring sired by previous males shortens the inter‐birth intervals of the mothers whose infants are targeted and thereby increases the reproductive fitness of the perpetrator. To test this hypothesis, we describe previously unreported cases of primary male replacement for two gibbon …
The ecology of white‐handed and pileated gibbons in a zone of overlap and hybridization in Thailand
OBJECTIVES: The study of related species in contact zones can elucidate what factors mediate species coexistence and geographical distributions. We investigated niche overlap and group interactions of two gibbon species and their hybrids co-occurring in a zone of overlap and hybridization. METHODS: The location, composition and behavior of white-handed, pileated, and mixed-species gibbon groups were studied by following them during 31 consecutive…
Long‐term home range use in white‐handed gibbons ( Hylobates lar ) in Khao Yai National Park, Thailand
Ranging behavior is an important element of how nonhuman primates obtain sufficient resources to ensure biological maintenance and reproductive success. As most primates live in permanent social groups, group members must balance the benefits of group living with the costs of intragroup competition for resources. One way to mitigate the cost of intragroup feeding competition is to increase foraging-related travel, thereby increasing the number of…
Gibbon ( Hylobates lar ) reintroduction success in Phuket, Thailand, and its conservation benefits
We summarize the results from a long-term gibbon reintroduction project in Phuket, Thailand, and evaluate its benefits to conservation. Between October 2002 and November 2012, eight breeding families of white-handed gibbons (Hylobates lar) were returned to the wild in Khao Phra Thaew non-hunting area (KPT). Wild gibbons were extirpated from Phuket Island by the early 1980s, but the illegal wildlife trade has continued to bring young gibbons from …
Habitat Characteristics and Their Effects on the Density of Groups of Western Hoolock Gibbon (Hoolock hoolock) in Namdapha National Park, Arunachal Pradesh, India
Interspecific territoriality in gibbons (Hylobates lar and H. pileatus) and its effects on the dynamics of interspecies contact zones
Averting biodiversity collapse in tropical forest protected areas
Dispersal, pair formation and social structure in gibbons ( Hylobates lar )
Estimation of density of gibbon groups by use of loud songs
The density of gibbon populations may be estimated by listening for the loud duetted songs of monogamous territorial groups. This method requires a correction factor which must be estimated from the frequency of singing of an adequate number of known study groups. The correction factor and its error were estimated for pileated gibbons ( Hylobates pileatus ) in Khao Soi Dao Wildlife Sanctuary in southeastern Thailand. Among 30 groups studied, 47% …
Polygyny in a group of Pileated Gibbons via a familial route
Social correlates of reproductive success in the Gibbon colony on Ko Klet Kaeo, Thailand
The free‐ranging colony of gibbons established on an island in the Gulf of Thailand by the SEATO Medical Research Laboratory in 1966–1967 was terminated in 1970. Out of the 20 gibbons originally introduced, four adults of each sex remained until near the end of the project. The four females each gave birth to one infant. In all cases the young were conceived five or more months after pairbonds and ranges had stabilized into a more natural‐like pa…
The ecology of white‐handed and pileated gibbons in a zone of overlap and hybridization in Thailand
OBJECTIVES: The study of related species in contact zones can elucidate what factors mediate species coexistence and geographical distributions. We investigated niche overlap and group interactions of two gibbon species and their hybrids co-occurring in a zone of overlap and hybridization. METHODS: The location, composition and behavior of white-handed, pileated, and mixed-species gibbon groups were studied by following them during 31 consecutive…
Habitat Characteristics and Their Effects on the Density of Groups of Western Hoolock Gibbon (Hoolock hoolock) in Namdapha National Park, Arunachal Pradesh, India
Social correlates of reproductive success in the Gibbon colony on Ko Klet Kaeo, Thailand
The free‐ranging colony of gibbons established on an island in the Gulf of Thailand by the SEATO Medical Research Laboratory in 1966–1967 was terminated in 1970. Out of the 20 gibbons originally introduced, four adults of each sex remained until near the end of the project. The four females each gave birth to one infant. In all cases the young were conceived five or more months after pairbonds and ranges had stabilized into a more natural‐like pa…
Social correlates of reproductive success in the Gibbon colony on Ko Klet Kaeo, Thailand
The free‐ranging colony of gibbons established on an island in the Gulf of Thailand by the SEATO Medical Research Laboratory in 1966–1967 was terminated in 1970. Out of the 20 gibbons originally introduced, four adults of each sex remained until near the end of the project. The four females each gave birth to one infant. In all cases the young were conceived five or more months after pairbonds and ranges had stabilized into a more natural‐like pa…
Polygyny in a group of Pileated Gibbons via a familial route
Estimation of density of gibbon groups by use of loud songs
The density of gibbon populations may be estimated by listening for the loud duetted songs of monogamous territorial groups. This method requires a correction factor which must be estimated from the frequency of singing of an adequate number of known study groups. The correction factor and its error were estimated for pileated gibbons ( Hylobates pileatus ) in Khao Soi Dao Wildlife Sanctuary in southeastern Thailand. Among 30 groups studied, 47% …
Dispersal, pair formation and social structure in gibbons ( Hylobates lar )
Interspecific territoriality in gibbons (Hylobates lar and H. pileatus) and its effects on the dynamics of interspecies contact zones
Averting biodiversity collapse in tropical forest protected areas
Gibbon ( Hylobates lar ) reintroduction success in Phuket, Thailand, and its conservation benefits
We summarize the results from a long-term gibbon reintroduction project in Phuket, Thailand, and evaluate its benefits to conservation. Between October 2002 and November 2012, eight breeding families of white-handed gibbons (Hylobates lar) were returned to the wild in Khao Phra Thaew non-hunting area (KPT). Wild gibbons were extirpated from Phuket Island by the early 1980s, but the illegal wildlife trade has continued to bring young gibbons from …
Habitat Characteristics and Their Effects on the Density of Groups of Western Hoolock Gibbon (Hoolock hoolock) in Namdapha National Park, Arunachal Pradesh, India
Long‐term home range use in white‐handed gibbons ( Hylobates lar ) in Khao Yai National Park, Thailand
Ranging behavior is an important element of how nonhuman primates obtain sufficient resources to ensure biological maintenance and reproductive success. As most primates live in permanent social groups, group members must balance the benefits of group living with the costs of intragroup competition for resources. One way to mitigate the cost of intragroup feeding competition is to increase foraging-related travel, thereby increasing the number of…
The ecology of white‐handed and pileated gibbons in a zone of overlap and hybridization in Thailand
OBJECTIVES: The study of related species in contact zones can elucidate what factors mediate species coexistence and geographical distributions. We investigated niche overlap and group interactions of two gibbon species and their hybrids co-occurring in a zone of overlap and hybridization. METHODS: The location, composition and behavior of white-handed, pileated, and mixed-species gibbon groups were studied by following them during 31 consecutive…
Infant loss during and after male replacement in gibbons
According to the sexual selection hypothesis, infanticide during resident male replacement is an adaptive strategy that has evolved because the killing of unweaned offspring sired by previous males shortens the inter‐birth intervals of the mothers whose infants are targeted and thereby increases the reproductive fitness of the perpetrator. To test this hypothesis, we describe previously unreported cases of primary male replacement for two gibbon …
Comparison of point transect distance and traditional acoustic point‐count sampling of hoolock gibbons in Htamanthi Wildlife Sanctuary, Myanmar
Effective conservation demands more accurate and reliable methods of survey and monitoring of populations. Surveys of gibbon populations have relied mostly on mapping of groups in “listening areas” using acoustical point‐count data. Traditional methods of estimating density in have usually used counts of gibbon groups within fixed‐radius areas or areas bounded by terrain barriers to sound transmission, and have not accounted for possible decline …
Genetic analysis of hybridization between white-handed (Hylobates lar) and pileated (Hylobates pileatus) gibbons in a contact zone in Khao Yai National Park, Thailand
What are they eating?
My journey into primatology
Estimation of White‐Handed Gibbon Density and Population Size in Huai Kha Khaeng Wildlife Sanctuary, Western Thailand
All 20 gibbon species (Hylobatidae) are listed as Threatened or Endangered on the IUCN Red List. The four species of gibbons occurring in Thailand survive only in well‐protected forests and need to be effectively monitored for conservation management. Because of their habit of duetting and living in small‐group territories, gibbons are usually surveyed using acoustic methods employing point counts. We surveyed the white‐handed gibbon ( Hylobates …
Biology (15 works) · Primate Behavior and Ecology (12 works) · Animal Vocal Communication and Behavior (11 works) · Demography (9 works) · Animal Behavior and Reproduction (8 works) · Population (8 works) · Zoology (8 works) · Ecology (7 works) · Geography (7 works) · Animal ecology (6 works)