Yukio Takahata
Biographic Data
| ID | 3073430 |
|---|---|
| NAME | Yukio Takahata |
| GIVEN NAMES | Yukio |
| FAMILY NAME | Takahata |
| SIGNATURE | TAKAHATA Y |
| AFFILIATIONS | Kwansei Gakuin University |
| ORCID | 0000-0001-9822-3197 |
| VERIFIED | Yes |
| TOTAL WORKS | 39 |
| TOTAL CITATIONS | 51 |
| AUTHOR COUNT | 39 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1980 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 4 |
Reorganization of female dominance relations after group fission of Japanese macaques (Macaca fuscata) in Arashiyama based on Kawamura’s principles
Seasonal hunting for red colobus monkeys by Mahale chimpanzees
With the spread of red colobus hunting by Mahale chimpanzees after the 1990s, hunting became more concentrated from August to October when the party size of chimpanzees increased. In particular, infant red colobus monkeys seemed to be caught more frequently from July to September compared to other age-group prey
Male chimpanzee age affects red colobus monkey hunting success
We used data collected from 1976 to 2010 in Mahale, Tanzania, to explore longitudinal changes in red colobus hunting throughout the life histories of individual male chimpanzees. The relative frequency (z-scores) of successful red colobus hunts by male chimpanzees exhibited an inverted U-shaped distribution with age. Hunting success increases when males are between 8–20 years old. Males in adulthood (20–35 years of age) made the highest number of…
My studies of primates
In this essay, I summarize my research career, with reference to the early days of the Laboratory of Physical Anthropology (LPA) at Kyoto University led by Kinji Imanishi and Junichiro Itani. When I started conducting research on the sexual behavior of Japanese macaques in 1975, I made some unexpected observations. High-ranking males did not obtain high mating success. Estrous females often rejected the courtships of high-ranking males and chose …
Process of Japanese macaque group fission at Arashiyama and the influences of maternal kin relations and social relations between adult males and females on it
Longitudinal changes in the targets of chimpanzee (Pan troglodytes) hunts at Mahale Mountains National Park
Ranging patterns of Japanese macaques in the coniferous forest of Yakushima
Ranging is one of the most important behavioral adaptations for coping with seasonally fluctuating food and thermal conditions. We studied the ranging patterns, in particular home range shift and travel rate of Japanese macaques ( Macaca fuscata ) in the coniferous forest of Yakushima by tracking a group for 17 months. We also supplemented our data with records collected every August over a 5‐year annual census. The macaque group used the eastern…
Wild chimpanzees deprived a leopard of its kill
Body mass of wild ring-tailed lemurs in Berenty Reserve, Madagascar, with reference to tick infestation
The relationship between female rank and reproductive parameters of the ringtailed lemur
Food conditions, competitive regime, and female social relationships in Japanese macaques
Influence of group size on reproductive success of female ring-tailed lemurs
Long-term changes in dominance ranks among ring-tailed lemurs at Berenty Reserve, Madagascar
Home ranges of ring-tailed lemur troops and the density of large trees at Berenty Reserve, Madagascar
At Berenty Reserve, Madagascar, we have set up a main study area of 14.2 ha to study the demographic changes of ring-tailed lemurs for 11 years from 1989 to 2000. We also have set up a broader study area of 30.4 ha to study the environmental changes, including the main study area. In the main study area, due to the social changes such as troop divisions and evictions, the number of troops increased from three to six. Consequently, home range size…
Comparisons of food availability and group density of Japanese macaques in primary, naturally regenerated, and plantation forests
We compared food availability and group density of Japanese macaques in Yakushima, southern Japan, among primary forest and two habitats that had been disturbed by logging and had different regeneration histories. The study was conducted in an undisturbed national park, forest that was logged 7–18 years ago and later naturally regenerated, and forest that was logged 19–27 years ago and later planted with Japanese cedar ( Cryptomeria japonica ) tr…
New method to census primate groups
We devised a new method to estimate the density of primate groups in habitats that preclude the use of a line‐transect census because the ground is too steep. We combined point census and group follows. From the number of groups counted at a fixed point for an hour, n , group density D was calculated: $D = {{\lambda n} \over \pi}$ . λ, the detectability constant, was a constant when distance‐dependent detectability g ( y ) was regressed on a half…
Population and social dynamics changes in ring-tailed lemur troops at Berenty, Madagascar between 1989–1999
Long-Term Trends in Matrilineal Inbreeding Among the Japanese Macaques of Arashiyama B Troop
Daytime deliveries observed for the ring-tailed lemurs of the berenty reserve, Madagascar
A ten-year summary of reproductive parameters for ring-tailed lemurs at berenty, madagascar
Variation in Intergroup Encounters in Two Populations of Japanese Macaques
Vertical distribution of wild Yakushima macaques (Macaca fuscata yakui) in the western area of Yakushima Island, Japan
Why dominants do not consistently attain high mating and reproductive success
Do bonobos copulate more frequently and promiscuously than chimpanzees
Does troop size of wild Japanese macaques influence birth rate and infant mortality in the absence of predators?
Chimpanzee predation in the Mahale mountains from August 1979 to May 1982
Variation in Intergroup Encounters in Two Populations of Japanese Macaques
Wild chimpanzees deprived a leopard of its kill
Newly acquired feeding habits among the chimpanzees of the Mahale Mountains National Park, Tanzania
Long-Term Trends in Matrilineal Inbreeding Among the Japanese Macaques of Arashiyama B Troop
Do bonobos copulate more frequently and promiscuously than chimpanzees
The reproductive biology of a free-ranging troop of Japanese monkeys
Social relations between adult males and females of Japanese monkeys in the arashiyama B troop
Chimpanzee predation in the Mahale mountains from August 1979 to May 1982
Group Extinction and Female Transfer in Wild Chimpanzees in the Mahale National Park, Tanzania
and Summary A unit‐group (K‐group) of chimpanzees has shown a drastic demographic change in the course of 17 years (1966–1983) of field study. K‐group had 6 adult males in 1966. Initially, the group lost adult males one by one between 1969–1975. The number of adult males in the unit‐group was the main factor influencing the immigration of strange, cycling females and the emigration of cycling females, although nulliparous females born into K‐grou…
A case of unusually early postpartum resumption of estrous cycling in a young female chimpanzee in the wild
Takayoshi Kano
Newly acquired feeding habits among the chimpanzees of the Mahale Mountains National Park, Tanzania
Reproductive parameters of female Japanese macaques
Juichi Yamagiwa Between Gorilla and Man
Troop extinction and fusion in wild Japanese macaques of Yakushima Island, Japan
A wild Japanese macaque troop decreased in size because the birth rate dropped and infant mortality increased. In the 1989 mating season, the last male left the troop, and the remaining two females joined a neighboring troop. Thus, the troop ceased to exist as an independent troop. A lower limit to troop size may exist, below which a troop cannot effectively defend its range, forcing the females to join a larger troop. © 1994 Wiley‐Liss, Inc
Do the old aged females experience a long post-reproductive life span?
Are daughters more costly to produce for Japanese macaque mothers?
Does troop size of wild Japanese macaques influence birth rate and infant mortality in the absence of predators?
Aggressive intergroup encounters in two populations of Japanese macaques (Macaca fuscata)
Reproduction of wild Japanese macaque females of Yakushima and Kinkazan Islands
Vertical distribution of wild Yakushima macaques (Macaca fuscata yakui) in the western area of Yakushima Island, Japan
Why dominants do not consistently attain high mating and reproductive success
Do bonobos copulate more frequently and promiscuously than chimpanzees
Variation in Intergroup Encounters in Two Populations of Japanese Macaques
Daytime deliveries observed for the ring-tailed lemurs of the berenty reserve, Madagascar
A ten-year summary of reproductive parameters for ring-tailed lemurs at berenty, madagascar
Population and social dynamics changes in ring-tailed lemur troops at Berenty, Madagascar between 1989–1999
Long-Term Trends in Matrilineal Inbreeding Among the Japanese Macaques of Arashiyama B Troop
New method to census primate groups
We devised a new method to estimate the density of primate groups in habitats that preclude the use of a line‐transect census because the ground is too steep. We combined point census and group follows. From the number of groups counted at a fixed point for an hour, n , group density D was calculated: $D = {{\lambda n} \over \pi}$ . λ, the detectability constant, was a constant when distance‐dependent detectability g ( y ) was regressed on a half…
Long-term changes in dominance ranks among ring-tailed lemurs at Berenty Reserve, Madagascar
Biology (38 works) · Primate Behavior and Ecology (38 works) · Animal Behavior and Reproduction (29 works) · Zoology (27 works) · Animal ecology (26 works) · Demography (26 works) · Ecology (23 works) · Animal Vocal Communication and Behavior (20 works) · Geography (18 works) · Population (16 works)