Unnatural selection

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The Economist Tags : Pet selection Posted: Friday , May 29, 2009 at 2305 hrs

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The results are worrying, however, because ecologists conduct thousands of studies each year that involve analysing animals caught in traps. These analyses are based on the assumption that the animals collected represent a randomly selected and thus representative sample of the population. Yet among collared flycatchers this does not appear to be the case. Instead it looks as if such trapping studies are selecting the bravest individuals. If that is true more widely, decades of ecological research will have to be re-examined. For this is one case where fortune most definitely does not favour the bold.

© The Economist Newspaper Limited 2009

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