Vocalizations of the mountain Gorilla (Gorilla gorilla beringei)
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TL;DR
On the basis of 2255 hr contact with free-living gorilla, and considerable observation of two captive infants, sixteen types of vocalization are described.
Abstract
On the basis of 2255 hr contact with free-living gorilla, and considerable observation of two captive infants, sixteen types of vocalization are described. Some of these could be grouped to give twelve basic categories. For each of the sixteen types data are presented on the frequency with which it is given by each age/sex class, the contexts in which it is given, the nature of the responses elicited from the various age/sex classes, etc.