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Science 14 August 1981:
Vol. 213. no. 4509, pp. 779 - 780
DOI: 10.1126/science.213.4509.779
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Articles

Sexual Difference Theory: Mormon Crickets Show Role Reversal in Mate Choice

DARRYL T. GWYNNE 1

1 Department of Biology, University of New Mexico, Albuquerque 87131

Male Mormon crickets produce a large spermatophore that the female eats. Spermatophore proteins are important to female reproduction, and females compete for access to singing males. Males reject most receptive females as mates, and those accepted are more fecund than rejected individuals. This role reversal in courtship is in contrast to the behavior of the sexes in katydid species in which the males produce small spermatophores.

Submitted on November 10, 1980
Revised on March 3, 1981


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