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Female Songs of the Nonduetting Javan Gibbons (Hylobates moloch) Function for Territorial Defense

Title
Female Songs of the Nonduetting Javan Gibbons (Hylobates moloch) Function for Territorial Defense
Authors
Ham S.Lappan S.Hedwig D.Choe J.C.
Ewha Authors
최재천
SCOPUS Author ID
최재천scopus
Issue Date
2017
Journal Title
International Journal of Primatology
ISSN
0164-0291JCR Link
Citation
vol. 38, no. 3, pp. 533 - 552
Keywords
Nonduetting gibbonsPrimate long-distance callsRanging behaviorSocial monogamySong functions
Publisher
Springer New York LLC
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Duets in territorial, pair-living primates may function to maintain intragroup cohesion, promote intergroup avoidance, and assist in territorial and resource defense, as well as advertising and reinforcing pair bonds. Despite the absence of duetting in Javan gibbons (Hylobates moloch), recent playback experiments suggested that Javan gibbon songs also play a role in pair-bond advertisement as well as territorial and mate defense. However, playback experiments only assess motivations of the listener, which may not reflect the motivations of the caller. We conducted an observational study of naturally occurring female songs in two groups of Javan gibbons from July 2009 to March 2010 and from March to November 2011 in Gunung Halimun–Salak National Park, Indonesia. We investigated female singing rates in relation to singing location, daily path length, occurrence of intergroup encounters, feeding rate, allogrooming rate, and distance between pair mates. The two females produced 47 songs during 164 observation days. Females in the area of their home range that overlapped with neighboring groups sang more frequently than expected based on time spent in the area of overlap vs. the home range interior. Groups also had longer daily path lengths on days when females sang than on nonsinging days, and on days when they visited the area of overlap than on nonvisiting days. Our findings indicate that, like the duets of other pair-living territorial primates, female Javan gibbon songs function for territorial defense, but we found no support for other functions such as intergroup avoidance, resource defense, and pair-bond reinforcement. © 2017, Springer Science+Business Media New York.
DOI
10.1007/s10764-017-9964-y
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자연과학대학 > 생명과학전공 > Journal papers
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