Free PDF Promiscuity An Evolutionary History of Sperm Competition
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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. Monogamy in animals - Wikipedia Monogamous pairing in animals refers to the natural history of mating systems in which species pair bond to raise offspring. This is associated usually implicitly ... Pulpit Helps "Convert or Die" Nearly half a million Christians from Indonesias Malukus region are living in appalling conditions as refugees. While the government is pressuring ... Wildlife Online - Natural History of the Red Fox RED FOX Vulpes vulpes. Content Updated: 3rd September 2015. CONTENTS: Evolution and Early Distribution Taxonomy North American Red foxes British Red foxes Inbreeding & the downfall of the Spanish Hapsburgs - Gene ... Thats a shocking degree of inbreeding that is made all the more clear when you crunch the numbers. The notion that they were more inbred than sibling pairings wow. What Do Women Really Want? Psychology Today What do women want? Sigmund Freud famously asked the question but he didn't have an answer. Even today the question of what motivates female sexual desire continues ... Female promiscuity - Wikipedia Bateman's principle implies that females are choosy because there is little evolutionary advantage for them to mate with multiple males. However observation of many ... Viruses and Other Gene Transfer Mechanisms. by Brig Klyce The What'sNEW section of this webpage lists hundreds of items pertaining to horizontal gene transfer (HGT). Left arrowheads here point to articles posted on our main ... Measuring sperm backflow following female orgasm: a new ... CLINICAL RESEARCH ARTICLE. Measuring sperm backflow following female orgasm: a new method. Robert King PhD 1 * Maria Dempsey PhD 1 and Katherine A. Valentine PhD 2 Official Publications: Research Expertise and Publications ... Arts Humanities and Social Sciences Office Faculty of Books and Chapters. Pauwels A.F.J. Australia and New Zealand/Australien und Neuseeland Sociolinguistics: An ...
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