EVOLUTIONARY CHANGE IN CRICKET ACOUSTICAL COMMUNICATION
EVOLUTIONARY CHANGE IN CRICKET ACOUSTICAL COMMUNICATION
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DOI:
10.2307/2406178
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发表时间:
1962-01-01
期刊:
影响因子:
3.3
通讯作者:
ALEXANDER, RD
中科院分区:
文献类型:
--
作者:
ALEXANDER, RD
The acoustical system of crickets involves tegminal stridulatory apparatus and tibial auditory organs. It originated before the Gryllidae and Tet-tigoniidae became separate evolutionary lines, presumably during the Jurassic Period. In crickets, the system functions only among adults in connection with reproductive activities, involving in some species as many as 6 different signals. Comparative analysis of acoustical behavior in 90 cricket species representing 8 subfamilies and 20 genera suggests that the first signal in the system operated during courtship. Long-range calling signals probably developed next, with aggressive signals evolving as an offshoot of the calling function. Sounds produced when courtship is interrupted are similar to aggressive signals; post-copulatory counds resemble calling; and a presumed "recognition" signal among sub-social crickets may be related to courtship. Evidence is presented to indicate that rates and directions of evolutionary change in cricket acoustical communication are affected by six principal aspects of the cricket''s make-up, its mode of life, and its history, as follows: (1) its general kind of habitat (surface and subterranean species have more kinds of signals than vegetation inhabitants); (2) its acoustical neighbors (species that are sexually active in the same places at the same times never have the same acoustical behavior, while some rather different allopatric species have very similar 3- and 4-signal repertoires); (3) the behavioral complexities involved in its particular mode of life (for example, elaboration of particular kinds of post-copulatory behavior has at least twice resulted in the development of a post-copulatory acoustical signal; (4) the number and kind of signals already in its repertoire (for example, calling signals appear to have evolved only as outgrowths of courtship signals); (5) the nature of the minimal information-carrying units (morphemes) in its signals (when species multiply or new signals are added to a repertoire, new morphemes must be produced, and in different cases this involves changes at different levels of structural complexity); (6) the kind of genetic and physiological regulation of its signals (species differences are associated with CNS-controlled, invariable units; signal differences within repertoires seem generally to depend upon more flexible units which can, for example, be adjusted by auditory feedback or other external stimuli).