Primate Behavior. Developments in Field and Laboratory by Leonard A. Rosenblum

By Leonard A. Rosenblum

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A ) Low squawk—msLximum frequency of fundamental band less than 750 Hz. ( b ) Medium squawk—msLximum frequency of fundamental band between 750 Hz and 1250 Hz. ( c ) High squawk— maximum frequency of fundamental band above 1250 Hz. ( d ) Squeak—note high pitch, click at onset, and sharp slope, ( e ) Ech—noisy with monotonically negative slope; click at onset, (f) U^—similar to ech without heavy noise overlay. tonality is continuous from the attack to the end of the units. Six types within this class have been identified.

In the copulatory season, Fut'64, a subadult female of the Arashiyama-B troop, has been following subadult male Mo'64 to which she is subordinate. She sits 5 meters from him and utters a dip late high coo. He stands and walks away, and she follows in immediate pursuit. One minute later she calmly approaches him again by a circuitous path, finally moving up to his side. He holds still, as she completes an approach to him and then begins grooming. After 3 minutes of grooming, mounting begins. Early indications of success may be more subtle, however.

The three squawks (Fig. 7a,b,c) are similar in appearance but differ in the pitch of the fundamental tone. Low squawks (Fig. 7 a ) are mildly plosive, short sounds in which the low-pitched fundamental is intense. These are used mostly by adult females in sexual solicitations, both hetero- and homosexual. They are directed toward a dominant individual while following closely on its heels or as darting toward it then backing away. Often the utterances VARIATION OF VOCAL PATTERN 49 seem triggered by a sudden motion or other unpredicted activity of the soHcited animal.

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