𝔖 Bobbio Scriptorium
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Species discrimination of male song in gibbons

✍ Scribed by Dr. John C. Mitani

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
762 KB
Volume
13
Category
Article
ISSN
0275-2565

No coin nor oath required. For personal study only.

✦ Synopsis

Acoustic analyses and field playback experiments were conducted to investigate interspecific song differences and discrimination in male gibbons. Songs were recorded and analyzed from males of three populations: agile gibbons (Hylobates agilis) in West Kalimantan and South Sumatra and Miiller's gibbons (Hylobates muelleri) in East Kalimantan. Male songs from each of the three populations were played back to West Kalimantan agile gibbons. Acoustic analyses indicated that the songs of the two species differed in spectral features and in the temporal patterning of syllables. Agile gibbon songs from the West Kalimantan and South Sumatran populations varied in song durations and in the maximum frequencies of one song element. Field playbacks showed that West Kalimantan agile gibbons respond in a similar manner to local songs and to conspecific songs from South Sumatra. In contrast, the animals responded differentially to conspecific and heterospecific Muller's gibbon songs. These results indicate that gibbons discriminate specific differences in songs, and support the division of agile and Muller's gibbons into distinct species.

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