TY - JOUR
T1 - Immature male gibbons produce female-specific songs
AU - Koda, Hiroki
AU - Oyakawa, Chisako
AU - Kato, Akemi
AU - Shimizu, Daisuke
AU - Rizaldi,
AU - Koyama, Yasuhiro
AU - Hasegawa, Satoshi
N1 - Funding Information:
Acknowledgments We thank Akira Kato, Jun Koike, Yuji Take-noshita, Koichiro Zamma, Takahisa Matsusaka, Noriko Ito, and all of the staff of the Japan Monkey Center for permitting us to conduct this study and for their assistance. We are grateful to Syamsuardi, Santi Nurulkamilah, the staff of Andalas University, and many friends in Indonesia for their tremendous support and friendship; and to John C. Mitani and Esther Clarke for their comments on our manuscripts. Our fieldwork was conducted under the Memorandum of Universities between KUPRI and UNAND. This study was supported by a Grant-in-Aid for Overseas Research (B) (20405016) to Hirohisa Hirai (HK joined as a co-PI), and by the Young Researcher Overseas Visits Program for Vitalizing Brain Circulation from the Primate Research Institute, Kyoto University.
PY - 2014/1
Y1 - 2014/1
N2 - Gibbons are apes that are well known to produce characteristic species-specific loud calls, referred to as "songs." Of particular interest is the sex specificity of the "great calls" heard in gibbon songs. However, little is known about the development of such calls. While great calls are given by female gibbons of various ages, they have never been recorded from males. Here, we report two observations of immature male gibbons from two different species, wild Hylobates agilis and captive H. lar, which spontaneously sang female-specific great calls. Based on the video clips, we conclude that immature males also have the potential to produce great calls. Our observations led us to propose a new hypothesis for the development of sexual differentiation in the songs of gibbons, and its implications for the general issue of sex-specific behavior in primates.
AB - Gibbons are apes that are well known to produce characteristic species-specific loud calls, referred to as "songs." Of particular interest is the sex specificity of the "great calls" heard in gibbon songs. However, little is known about the development of such calls. While great calls are given by female gibbons of various ages, they have never been recorded from males. Here, we report two observations of immature male gibbons from two different species, wild Hylobates agilis and captive H. lar, which spontaneously sang female-specific great calls. Based on the video clips, we conclude that immature males also have the potential to produce great calls. Our observations led us to propose a new hypothesis for the development of sexual differentiation in the songs of gibbons, and its implications for the general issue of sex-specific behavior in primates.
KW - Gibbon songs
KW - Sexual differentiation
KW - Sexual maturation
KW - Song development
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U2 - 10.1007/s10329-013-0390-2
DO - 10.1007/s10329-013-0390-2
M3 - Article
C2 - 24158401
AN - SCOPUS:84890887734
VL - 55
SP - 13
EP - 17
JO - Primates
JF - Primates
SN - 0032-8332
IS - 1
ER -