Biotelemetry of the Vocalizations of a Group of Monkeys
Résumé
Five monkeys belonging to the same family were equipped with miniature VHF, FM transmitters. The calls of each monkey were transmitted to five FM receivers and recorded on a multitrack tape recorder. The animals released in their usual enclosure were recorded during different activities: awakening, falling asleep, resting, feeding, alarming, etc. I present (a) the technical apparatus and its performance; (b) nature of different sounds recorded; (c) qualitative and quantitative vocal expression of one animal; and (d) study of vocal exchanges between several individuals.