A first report of separation calls in southern yellow‑cheeked gibbons (Nomascus gabriellae) in captivity

HRADEC, Michal, ILLMANOVÁ, Gudrun a BOLECHOVÁ, Petra. A first report of separation calls in southern yellow‑cheeked gibbons (Nomascus gabriellae) in captivity. Primates, 2021, 62, 5-10. ISSN 0032-8332.
Kateg. publikaceVědecké publikace impaktované
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Abstrakt

The effects of social separation, including vocalization, have been studied for a very long time in non-human primates under laboratory conditions. As part of the long-term research on the vocal behaviour of Nomascus gibbons in zoos, this study provides the first record of calls of the southern yellow-cheeked gibbon (Nomascus gabriellae) in response to involuntary separation. Our study revealed that calls were also emitted by an infant (aged 1 year 8 months), and that the acoustic structure of the infant’s calls was similar to that of older individuals’ calls. Separation-induced calls seem to have a shorter developmental convergence than vocalizations with a stable pattern (which are specific for species and sex). The acoustic structure of the calls reported here comprised simple syllables, and differed from the sex- and species-specific vocal patterns of this species. Our findings demonstrate a novel paradigm in this genus, and provide evidence of the ability of gibbons to express distress when socially separated.

ProjektDlouhodobý koncepční rozvoj výzkumné organizace
OdděleníEtologie