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Nature Neuroscience 11, 989–990 (1 September 2008) | doi:10.1038/nn0908-989

Octopamine fuels fighting flies

Christopher J Potter & Liqun Luo

Aggression is an innate behavior that helps to ensure that the fittest animals survive. Aggression among conspecific animals typically favors individuals that can most effectively protect and utilize limited resources such as mates or food.