Hideki Sugiura
Biographic Data
| ID | 6216221 |
|---|---|
| NAME | Hideki Sugiura |
| GIVEN NAMES | Hideki |
| FAMILY NAME | Sugiura |
| SIGNATURE | SUGIURA H |
| AFFILIATIONS | Kyoto University |
| ORCID | 0000-0002-7808-3905 |
| VERIFIED | Yes |
| TOTAL WORKS | 20 |
| TOTAL CITATIONS | 22 |
| WORKS AS AUTHOR | 20 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1998 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 3 |
Density of Japanese macaques in the western lowland forest of Yakushima and its 50-year temporal changes
Impact of new coronavirus infection on research activities in Yakushima and Koshima
Symposium report
11)
Improving the standards for gut microbiome analysis of fecal samples
Male replacement and stability of territorial boundary in a group of agile gibbons (Hylobates agilis agilis) in West Sumatra, Indonesia
Effects of proximity and activity on visual and auditory monitoring in wild Japanese Macaques
Group‐living primates monitor group members to maintain the spatial cohesiveness of the group. We examined the possibility that visual scanning (turning the head for more than 3 sec) and contact calls (coo calls) function as visual and auditory monitoring behaviors to avoid separation from group members in wild Japanese macaques. The rate of visual scanning increased as proximity to group members decreased and as mobile activities (foraging and m…
Variation in Spatial Cohesiveness in a Group of Japanese Macaques (Macaca fuscata)
Effects of caller activity and habitat visibility on contact call rate of wild Japanese macaques ( Macaca fuscata )
A major function of contact calls in nonhuman primates is to maintain spatial cohesion among individuals in a group. The risks of spatial/visual separation from the group are likely to affect auditory contact behavior, in particular by increasing the call rate. We tested whether the risk of separation influences coo call emission by investigating the variation in call rate among behavioral contexts in two wild populations of Japanese macaques ( M…
A study on the social structure and dispersal patterns of hamadryas baboons living in a commensal group at Taif, Saudi Arabia
Acoustic features contributing to the individuality of wild agile gibbon ( Hylobates agilis agilis ) songs
We examined acoustic individuality in wild agile gibbon Hylobates agilis agilis and determined the acoustic variables that contribute to individual discrimination using multivariate analyses. We recorded 125 female‐specific songs (great calls) from six groups in west Sumatra and measured 58 acoustic variables for each great call. We performed principal component analysis to summarize the 58 variables into six acoustic principal components (PCs). …
Effects of proximity and behavioral context on acoustic variation in the coo calls of Japanese macaques
Acoustic features of coo calls in Japanese macaques ( Macaca fuscata ) show large and graded variation. To explore the relevance of acoustic variation in coo calls, I examined whether acoustic features differed by the caller's activity and proximity to group members. The subjects were five adult females from a wild, habituated group of Japanese macaques consisting of 23 individuals. Coo calls from the five females were recorded with their activit…
Seasonal variation in fecal testosterone levels in free‐ranging male Japanese macaques
Seasonal variation in fecal testosterone levels in free‐ranging male Japanese macaques ( Macaca fuscata ) was examined with reference to their dominance rank and age class. Six adult (≥7 years old, three higher‐ranking and three lower‐ranking) and four adolescent (5–6 years old, two higher‐ranking and two lower‐ranking) males were selected as target animals. Fecal samples of these males were collected during the first 3–5 days of each month and a…
Long-term variation in fruiting and the food habits of wild Japanese nacaques on Kinkazan Island, northern Japan
We studied the relationship between the food habits of Japanese macaques (Macaca fuscata) and the availability of nuts (Fagus crenata, Zelkova serrata, Carpinus spp., and Torreya nucifera) on Kinkazan Island, northern Japan, from 1997 to 2005 to examine the long-term variations in both food habits and availability. The food habits of the monkeys showed clear seasonal changes: the staple foods were woody leaves and flowers in spring (May and June)…
Hormone profiles and reproductive characteristics in wild female Japanese macaques ( Macaca fuscata )
In this study we investigated the reproductive characteristics of wild female Japanese macaques ( Macaca fuscata fuscata ) in 2 nonconsecutive years using noninvasive methods to monitor physiological events. We detected ovulation dates and ascertained conceptions from fecal hormone profiles. First ovulations occurred from middle October to early November in 1997, and from middle to late November in 1999. Most females conceived during their first …
Troop Extinction and Female Fusion in Wild Japanese Macaques in Yakushima
Measurement of urinary and fecal steroid metabolites during the ovarian cycle in captive and wild Japanese macaques, Macaca fuscata
We measured the concentration of steroid hormones from urine, feces, and blood samples of two captive Japanese macaques, Macaca fuscata , during nonconceptive ovarian cycles to compare the patterns of the excreted steroids with those of circulating steroids. Urine and feces were analyzed for estrone conjugates (E 1 C) and pregnanediol‐3‐glucronide (PdG) using enzyme immunoassays (EIAs), while plasma was analyzed for estradiol‐17β(E 2 ), progester…
Variation in Intergroup Encounters in Two Populations of Japanese Macaques
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
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
Variation in Intergroup Encounters in Two Populations of Japanese Macaques
Measurement of urinary and fecal steroid metabolites during the ovarian cycle in captive and wild Japanese macaques, Macaca fuscata
We measured the concentration of steroid hormones from urine, feces, and blood samples of two captive Japanese macaques, Macaca fuscata , during nonconceptive ovarian cycles to compare the patterns of the excreted steroids with those of circulating steroids. Urine and feces were analyzed for estrone conjugates (E 1 C) and pregnanediol‐3‐glucronide (PdG) using enzyme immunoassays (EIAs), while plasma was analyzed for estradiol‐17β(E 2 ), progester…
Troop Extinction and Female Fusion in Wild Japanese Macaques in Yakushima
Hormone profiles and reproductive characteristics in wild female Japanese macaques ( Macaca fuscata )
In this study we investigated the reproductive characteristics of wild female Japanese macaques ( Macaca fuscata fuscata ) in 2 nonconsecutive years using noninvasive methods to monitor physiological events. We detected ovulation dates and ascertained conceptions from fecal hormone profiles. First ovulations occurred from middle October to early November in 1997, and from middle to late November in 1999. Most females conceived during their first …
Long-term variation in fruiting and the food habits of wild Japanese nacaques on Kinkazan Island, northern Japan
We studied the relationship between the food habits of Japanese macaques (Macaca fuscata) and the availability of nuts (Fagus crenata, Zelkova serrata, Carpinus spp., and Torreya nucifera) on Kinkazan Island, northern Japan, from 1997 to 2005 to examine the long-term variations in both food habits and availability. The food habits of the monkeys showed clear seasonal changes: the staple foods were woody leaves and flowers in spring (May and June)…
A study on the social structure and dispersal patterns of hamadryas baboons living in a commensal group at Taif, Saudi Arabia
Acoustic features contributing to the individuality of wild agile gibbon ( Hylobates agilis agilis ) songs
We examined acoustic individuality in wild agile gibbon Hylobates agilis agilis and determined the acoustic variables that contribute to individual discrimination using multivariate analyses. We recorded 125 female‐specific songs (great calls) from six groups in west Sumatra and measured 58 acoustic variables for each great call. We performed principal component analysis to summarize the 58 variables into six acoustic principal components (PCs). …
Effects of proximity and behavioral context on acoustic variation in the coo calls of Japanese macaques
Acoustic features of coo calls in Japanese macaques ( Macaca fuscata ) show large and graded variation. To explore the relevance of acoustic variation in coo calls, I examined whether acoustic features differed by the caller's activity and proximity to group members. The subjects were five adult females from a wild, habituated group of Japanese macaques consisting of 23 individuals. Coo calls from the five females were recorded with their activit…
Seasonal variation in fecal testosterone levels in free‐ranging male Japanese macaques
Seasonal variation in fecal testosterone levels in free‐ranging male Japanese macaques ( Macaca fuscata ) was examined with reference to their dominance rank and age class. Six adult (≥7 years old, three higher‐ranking and three lower‐ranking) and four adolescent (5–6 years old, two higher‐ranking and two lower‐ranking) males were selected as target animals. Fecal samples of these males were collected during the first 3–5 days of each month and a…
Effects of caller activity and habitat visibility on contact call rate of wild Japanese macaques ( Macaca fuscata )
A major function of contact calls in nonhuman primates is to maintain spatial cohesion among individuals in a group. The risks of spatial/visual separation from the group are likely to affect auditory contact behavior, in particular by increasing the call rate. We tested whether the risk of separation influences coo call emission by investigating the variation in call rate among behavioral contexts in two wild populations of Japanese macaques ( M…
Effects of proximity and activity on visual and auditory monitoring in wild Japanese Macaques
Group‐living primates monitor group members to maintain the spatial cohesiveness of the group. We examined the possibility that visual scanning (turning the head for more than 3 sec) and contact calls (coo calls) function as visual and auditory monitoring behaviors to avoid separation from group members in wild Japanese macaques. The rate of visual scanning increased as proximity to group members decreased and as mobile activities (foraging and m…
Variation in Spatial Cohesiveness in a Group of Japanese Macaques (Macaca fuscata)
Male replacement and stability of territorial boundary in a group of agile gibbons (Hylobates agilis agilis) in West Sumatra, Indonesia
Improving the standards for gut microbiome analysis of fecal samples
Impact of new coronavirus infection on research activities in Yakushima and Koshima
Symposium report
11)
Density of Japanese macaques in the western lowland forest of Yakushima and its 50-year temporal changes
Biology (19 works) · Primate Behavior and Ecology (17 works) · Animal Behavior and Reproduction (15 works) · Zoology (12 works) · Animal Vocal Communication and Behavior (10 works) · Demography (9 works) · Animal ecology (8 works) · Population (8 works) · Geography (7 works) · Medicine (7 works)