Author： SHAW KENNETH C.
Publisher： Entomological Society of America
ISSN： 1938-2901
Source： Annals of the Entomological Society of America, Vol.68, Iss.2, 1975-03, pp. : 245-250
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Abstract
Small groups or colonies of males of the northern population of Pterophylla Camellifolia (F.) can be characterized by the range and mode of the number of pulses in their chirps. During the first 1-2 wk after sexual maturity, many males produce chirps that are longer and more variable in length than chirps produced later in the season. Shortening of chirp lengths by katydids 1) isolated from the sounds of conspecifics, and 2) forced to interact acoustically with a katydid producing shorter chirps, suggests that acoustical interaction among katydids effects change or stabilization of chirp length. A mechanism is proposed to explain short and long term changes in chirp length of P. camellifolia males.
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