Abstract：
:The Japanese macaque (Macaca fuscata) exhibits a species-specific communication sound called the "coo call" to locate group members and maintain within-group contact. Monkeys have been demonstrated to be capable of discriminating between individuals based only on their voices, but there is still debate regarding how the fundamental frequencies (F0) and filter properties of the vocal tract characteristics (VTC) contribute to individual discrimination in nonhuman primates. This study was performed to investigate the acoustic keys used by Japanese macaques in individual discrimination. Two animals were trained with standard Go/NoGo operant conditioning to distinguish the coo calls of two unfamiliar monkeys. The subjects were required to continue depressing a lever until the stimulus changed from one monkey to the other. The test stimuli were synthesized by combining the F0s and VTC from each individual. Both subjects released the lever when the VTC changed, whereas they did not when the F0 changed. The reaction times to the test stimuli were not significantly different from that to the training stimuli that shared the same VTC. Our data suggest that vocal tract characteristics are important for the identification of individuals by Japanese macaques.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Furuyama T,Kobayasi KI,Riquimaroux Hdoi
10.1038/srep32042subject
Has Abstractpub_date
2016-08-23 00:00:00pages
32042issn
2045-2322pii
srep32042journal_volume
6pub_type
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