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Science 21 January 1994:
Vol. 263. no. 5145, pp. 373 - 374
DOI: 10.1126/science.8278809
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Articles

Science, Vol 263, Issue 5145, 373-374
Copyright © 1994 by American Association for the Advancement of Science

articles

Benefit to male sailfin mollies of mating with heterospecific females

I Schlupp, C Marler, and MJ Ryan

Department of Zoology, University of Texas, Austin 78712.

Female gynogens reproduce clonally but rely on sperm from heterospecific males to initiate embryogenesis. It has been assumed that males gain no benefit from such matings; thus, selection should favor males that avoid them. Here it is shown that males gain a benefit by mating with female gynogens in an asexual-sexual complex of fish. The sexual females increase their preference for males whom they observe consorting with female gynogens. Thus, gynogenetic species might persist because selection favors males to be sexually parasitized.


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