Guppies hang out with ugly fish to make themselves seem more attractive -

Guppies hang out with ugly fish to make themselves seem more attractive - 

When it comes to mating, guppies treasure their ugly friends—because they look so good by comparison.
An article published Wednesday by Britain’s Royal Society says that male guppies prefer to associate with their drab-coloured counterparts when females are around.
“Males actively choose the social context that maximizes their relative attractiveness,” the article said. Or, as lead author Clelia Gasparini put it, “If you are surrounded by ugly friends, you look better.”
Gasparini and her colleagues at Italy’s University of Padua built their theory on a kind of guppy dating game. An aquarium was set up with one female in partition on either end. Guppy bachelorette No. 1 had two attractive, brightly-coloured males placed on either side of her. Guppy bachelorette No. 2 was stuck with uglier, drab-coloured fish.
When a male guppy was put in the middle of the tank, and given the choice of which female to sidle up to, Bachelorette No. 2 was the more popular pick, with male guppies spending about 62 per cent of their time hanging around her side of the aquarium.
What’s more, the researchers found that the time guppies spent with bachelorette No. 2 correlated with their unattractiveness. The uglier the guppy, the less likely it was that he would hang around the brightly coloured fish placed next to bachelorette No. 1.
Because it could be argued that that guppies avoided their brightly coloured pals because attractive fish were more aggressive, or because predators were more likely to spot them, the experiment was repeated. Researchers ran it without any females, and again with the lights in the male enclosures turned down so that the test guppies couldn’t see them.

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http://www.thestar.com/news/world/2013/02/13/guppies_hang_out_with_ugly_fish_to_make_themselves_seem_more_attractive.html