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choice of alternative sperm, all within the female’s reproductive tract. William Eberhard reviews the history of ideas for these underappreciated but nevertheless intense forms of postcopulatory sexual selection in Chapter 12. The miniature worlds of gametic competition and gametic choice have proven to be every bit as fascinating and compelling as the macroscopic worlds of mating competition and mate choice that have been the traditional foci of sexual selection studies. Eberhard brings this miniature Kama Sutra realm to light by detailing fascinating examples of sexual selection in the time interval (which is often but not invariably brief) between the onset of copulation and the completion of fertilization.

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