Hiroki Koda
Biographic Data
| ID | 5008211 |
|---|---|
| NAME | Hiroki Koda |
| GIVEN NAMES | Hiroki |
| FAMILY NAME | Koda |
| SIGNATURE | KODA H |
| AFFILIATIONS | Kyoto University |
| ORCID | 0000-0002-0927-3473 |
| VERIFIED | Yes |
| TOTAL WORKS | 14 |
| TOTAL CITATIONS | 4 |
| AUTHOR COUNT | 14 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2007 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 1 |
Analysis of individual identification and age-class classification of wild female macaque vocalizations without pitch- and formant-based acoustic parameter measurements
Exploring the Emergence of Organized Colouration in Paintings Through Cultural Transmission
Painting and drawing are symbolic representations that visually transform natural scenes into line and colour. These visual expressions change through cultural transmission—the process by which artworks are reproduced and modified across individuals or communities. While structured patterns have been observed in transmitted language and music, it remains unclear whether similar structuring occurs in colour use for visual representations. This stu…
Macaque progressions
Trigger of twin‐fights in captive common marmosets
Common marmosets usually give birth to twins and form a social group consisting of a breeding couple and pairs of same‐aged siblings. The twins may engage in the first agonistic fights between them, twin‐fights (TFs), during adolescence. This study investigated the TFs based on records accumulated in our captive colony over 12 years to elucidate the proximate causations that trigger the TFs. We aimed to determine whether the TF onset mainly depen…
Dominance status and copulatory vocalizations among male stump-tailed macaques in Thailand
Enhanced cognitive processing by viewing snakes in children with autism spectrum disorder. A preliminary study
There were possible odd color-specific effects in children with ASD when images were presented to the children in green. Implications of the findings are argued with respect to active avoidance or attraction as one of the behavioral characteristics commonly noted in children with ASD
Speech‐like orofacial oscillations in stump‐tailed macaque ( Macaca arctoides ) facial and vocal signals
OBJECTIVES: Speech is unique to humans and characterized by facial actions of ∼5 Hz oscillations of lip, mouth or jaw movements. Lip-smacking, a facial display of primates characterized by oscillatory actions involving the vertical opening and closing of the jaw and lips, exhibits stable 5-Hz oscillation patterns, matching that of speech, suggesting that lip-smacking is a precursor of speech. We tested if facial or vocal actions exhibiting the sa…
The vocal repertoire of Tibetan macaques ( Macaca thibetana )
Vocal repertoires are basic and essential components for describing vocal communication in animals. Studying the entire suite of vocal signals aids investigations on the variation of acoustic structure across social contexts, comparisons on the complexity of communication systems across taxa, and in exploration of the evolutionary origins of species-specific vocalizations. Here, we describe the vocal repertoire of the largest species in the macaq…
Immature male gibbons produce female-specific songs
Age- and sex-dependent contact call usage in Japanese macaques
Male replacement and stability of territorial boundary in a group of agile gibbons (Hylobates agilis agilis) in West Sumatra, Indonesia
Soprano singing in gibbons
Diversifications in primate vocalization, including human speech, are believed to reflect evolutionary modifications in vocal anatomy and physiology. Gibbon song is acoustically unique, comprising loud, melodious, penetrating pure tone‐like calls. In a white‐handed gibbon, Hylobates lar , the fundamental frequency ( f 0 ) of song sounds is amplified distinctively from the higher harmonics in normal air. In a helium‐enriched atmosphere, f 0 does n…
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…
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). …
Soprano singing in gibbons
Diversifications in primate vocalization, including human speech, are believed to reflect evolutionary modifications in vocal anatomy and physiology. Gibbon song is acoustically unique, comprising loud, melodious, penetrating pure tone‐like calls. In a white‐handed gibbon, Hylobates lar , the fundamental frequency ( f 0 ) of song sounds is amplified distinctively from the higher harmonics in normal air. In a helium‐enriched atmosphere, f 0 does n…
Speech‐like orofacial oscillations in stump‐tailed macaque ( Macaca arctoides ) facial and vocal signals
OBJECTIVES: Speech is unique to humans and characterized by facial actions of ∼5 Hz oscillations of lip, mouth or jaw movements. Lip-smacking, a facial display of primates characterized by oscillatory actions involving the vertical opening and closing of the jaw and lips, exhibits stable 5-Hz oscillation patterns, matching that of speech, suggesting that lip-smacking is a precursor of speech. We tested if facial or vocal actions exhibiting the sa…
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 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…
Male replacement and stability of territorial boundary in a group of agile gibbons (Hylobates agilis agilis) in West Sumatra, Indonesia
Soprano singing in gibbons
Diversifications in primate vocalization, including human speech, are believed to reflect evolutionary modifications in vocal anatomy and physiology. Gibbon song is acoustically unique, comprising loud, melodious, penetrating pure tone‐like calls. In a white‐handed gibbon, Hylobates lar , the fundamental frequency ( f 0 ) of song sounds is amplified distinctively from the higher harmonics in normal air. In a helium‐enriched atmosphere, f 0 does n…
Age- and sex-dependent contact call usage in Japanese macaques
Immature male gibbons produce female-specific songs
The vocal repertoire of Tibetan macaques ( Macaca thibetana )
Vocal repertoires are basic and essential components for describing vocal communication in animals. Studying the entire suite of vocal signals aids investigations on the variation of acoustic structure across social contexts, comparisons on the complexity of communication systems across taxa, and in exploration of the evolutionary origins of species-specific vocalizations. Here, we describe the vocal repertoire of the largest species in the macaq…
Speech‐like orofacial oscillations in stump‐tailed macaque ( Macaca arctoides ) facial and vocal signals
OBJECTIVES: Speech is unique to humans and characterized by facial actions of ∼5 Hz oscillations of lip, mouth or jaw movements. Lip-smacking, a facial display of primates characterized by oscillatory actions involving the vertical opening and closing of the jaw and lips, exhibits stable 5-Hz oscillation patterns, matching that of speech, suggesting that lip-smacking is a precursor of speech. We tested if facial or vocal actions exhibiting the sa…
Enhanced cognitive processing by viewing snakes in children with autism spectrum disorder. A preliminary study
There were possible odd color-specific effects in children with ASD when images were presented to the children in green. Implications of the findings are argued with respect to active avoidance or attraction as one of the behavioral characteristics commonly noted in children with ASD
Dominance status and copulatory vocalizations among male stump-tailed macaques in Thailand
Macaque progressions
Trigger of twin‐fights in captive common marmosets
Common marmosets usually give birth to twins and form a social group consisting of a breeding couple and pairs of same‐aged siblings. The twins may engage in the first agonistic fights between them, twin‐fights (TFs), during adolescence. This study investigated the TFs based on records accumulated in our captive colony over 12 years to elucidate the proximate causations that trigger the TFs. We aimed to determine whether the TF onset mainly depen…
Analysis of individual identification and age-class classification of wild female macaque vocalizations without pitch- and formant-based acoustic parameter measurements
Exploring the Emergence of Organized Colouration in Paintings Through Cultural Transmission
Painting and drawing are symbolic representations that visually transform natural scenes into line and colour. These visual expressions change through cultural transmission—the process by which artworks are reproduced and modified across individuals or communities. While structured patterns have been observed in transmitted language and music, it remains unclear whether similar structuring occurs in colour use for visual representations. This stu…
Animal Vocal Communication and Behavior (11 works) · Biology (10 works) · Primate Behavior and Ecology (10 works) · Animal Behavior and Reproduction (8 works) · Psychology (8 works) · Zoology (8 works) · Animal ecology (6 works) · Macaque (5 works) · Communication (4 works) · Demography (4 works)