Spite_s+roots+-+The+Scientist+-+Magazine+of+the+Life+Sciences

Spite_s roots The - Spite's roots The Scientist Magazine of the Life Sciences 9:52 AM Volume 24 | Issue 10 | Page 22 Date Reprints | Issue Contents

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10/1/10 9:52 AM Spite's roots - The Scientist - Magazine of the Life Sciences Page 1 of 2 http://www.the-scientist.com/article/display/57720/ Steinernema carpocapsae Courtesy of Allen Szalanski Related Articles Going Against the Group Spite: Evolution Finally Gets Nasty Microbial Co-op in Evolution Examining interactions among organisms you’d never peg as vengeful Spite seems to be a uniquely human phenomenon, but examining interactions among organisms you’d never peg as vengeful is giving scientists some insight into how the rather nasty behavior arose. It’s difficult to see how spite could evolve: what benefit is there in punishing another party at the cost of harming one’s own reproductive fitness? “Six years ago, no one thought it was possible,” says Oxford University evolutionary biologist Stuart West. Some researchers have suggested that natural selection can favor spite if the recipient is less related to the actor than would be expected by chance. But this circumstance would not be widespread in nature, limited to small populations or to social insect colonies where sterile workers and soldiers have nothing to lose in terms of individual reproductive fitness. Hadas Hawlena, a postdoc in evolutionary biologist Curt Lively’s Indiana University lab, became interested in a different hypothesis for the evolution of spiteful behavior. The hypothesis
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This note was uploaded on 11/07/2010 for the course INTEGBI 118 taught by Professor Shapira during the Fall '10 term at University of California, Berkeley.

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Spite_s roots The - Spite's roots The Scientist Magazine of the Life Sciences 9:52 AM Volume 24 | Issue 10 | Page 22 Date Reprints | Issue Contents

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