Abstract
In the laboratory, 156 Pseudacris triseriata reacted to a choice of two calls; some were unaltered natural calls, others were electromechanically constructed. The results of these tests show that female P. triseriata respond to a wide variety of auditory stimuli. Some outstanding characteristics of the call, for example, notes-their number, spacing and patterns of intensity and frequency, are not essential for the mating response of the female. In general, the most functional features of the call seem to be the following: harmonic qualities, duration of 0.50 to 0.75 sec, interval between calls about 1.0 sec, intensity approximately that of the natural call, frequency about 1,800-2,600 cps, continuous calling over several minutes and from the same general locus.
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