ABOUT THIS BOOK Males are promiscuous and ferociously competitive.Females--both human and of other species--are naturally monogamous. That at least is what the study of sexual behavior after Darwin assumed, perhaps because it was written by men. Only in recent years has this version of events been challenged. Females, it has become clear, are remarkably promiscuous and have evolved an astonishing array of strategies, employed both before and after copulation, to determine exactly who will father their offspring.
Tim Birkhead reveals a wonderful world in which males and females vie with each other as they strive to maximize their reproductive success. Both sexes have evolved staggeringly sophisticated ways to get what they want--often at the expense of the other. He introduces us to fish whose first encounter locks them together for life in a perpetual sexual embrace; hermaphrodites who "joust" with their reproductive organs, each trying to inseminate the other without being inseminated; and tiny flies whose seminal fluid is so toxic that it not only destroys the sperm of rival males but eventually kills the female. He explores the long and tortuous road leading to our current state of knowledge, from Aristotle's observations on chickens, to the first successful artificial insemination in the seventeenth century, to today's ingenious molecular markers for assigning paternity. And he shows how much human behavior--from the wife-sharing habits of Inuit hunters to Charlie Chaplin's paternity case--is influenced by sperm competition.
Lucidly written and lavishly illustrated, with a wealth of fascinating detail and vivid examples, Promiscuity is the ultimate guide to the battle of the sexes.
Table of Contents:
List of Plates
1. Competition, Choice and Sexual Conflict
2. Paternity and Protection
4. Sperm, Ejaculates and Ova
5. Copulation, Insemination and Fertilization
6. Mechanisms of Sperm Competition and Sperm Choice
7. The Benefits of Polyandry
Appendix: Species mentioned in the text
Reviews of this book:
Birkhead...has written an engrossing, accessible explanation of sperm competition and related elements of animal biology. Birkhead succeeds on two levels at once. He sets out evolutionists' arguments about sperm competition and sexual selection, and shows how their hypotheses have been tested. He also offers a fantastic array of biological believe-it-or-nots. [His] work is solid and intriguing, a clear picture of many out-there phenomena; no one who cares for biology should miss it.
Reviews of this book:
[Darwin] didn't expand on...promiscuity in females...but Tim Birkhead more than makes up for Darwin's omission. Promiscuity
is a fascinating, wide-ranging, erudite, readable journey through some of the weirder stretches of biology.
--A. H. Harcourt, Nature
Reviews of this book:
[A] fascinating story of a revolution in evolutionary biology. Until recently, biologists and cigar-toting males who haunt singles bars would have agreed that the reproductive act is what it's about. That may still be the case for singles-bar louts, but biologists now know the Darwinian struggle to reproduce does not end with copulation. "Generations of reproductive biologists assumed females to be sexually monogamous," Birkhead writes, but recently they've found that in many species of insects, birds and reptiles, females are highly promiscuous...These new findings demolish the idea that reproduction is a warm, romantic collaboration. "This is real sexual conflict: the battle of the sexes," Birkhead says,; males and females are out to get "the best, selfish genetic deal they can get." The battle of the sexes is an old story, but the idea that it continues after copulation, in the microscopic arena of sperm and eggs, is distinctly new...As the battle of the sexes continues, Birkhead's provocative book is a reminder of how little we know.
--Paul Raeburn, New York Times Book Review
Reviews of this book:
Darwin's evolutionary theory, as originally presented, taught the importance of, and the powerful results of, the processes of sexual selection. Howev