DOI: 10.1126/science.275.5308.1934 , 1934 (1997); 275 Science et al. David N. Reznick, ) Poecilia reticulata Populations of Guppies ( Evaluation of the Rate of Evolution in Natural www.sciencemag.org (this information is current as of January 21, 2008 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/275/5308/1934 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/275/5308/1934#otherarticles 21 articles hosted by HighWire Press; see: cited by This article has been http://www.sciencemag.org/cgi/collection/evolution Evolution : subject collections This article appears in the following http://www.sciencemag.org/about/permissions.dtl in whole or in part can be found at: this article permission to reproduce of this article or about obtaining reprints Information about obtaining registered trademark of AAAS. is a Science 1997 by the American Association for the Advancement of Science; all rights reserved. The title Copyright American Association for the Advancement of Science, 1200 New York Avenue NW, Washington, DC 20005. (print ISSN 0036-8075; online ISSN 1095-9203) is published weekly, except the last week in December, by the Science on January 21, 2008 www.sciencemag.org Downloaded from