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(Phys.org) —Researchers at the University of St Andrews have made a shock discovery; that restricting a normally multiply mating fish to monogamous mating does not impair their colonisation ability. Their findings show that releasing just one or two fish into the wild may be enough to trigger an aquatic invasion.
In a paper published this month in the journal BMC Ecology researchers from the University of St Andrews tested whether forcing female guppies to be monogamous would impede their ability to establish viable populations.
The guppy (Poecilia reticulata) is a successful invasive species throughout the tropics. In the wild it employs a 'multiple mating' strategy, and resulting broods commonly contain offspring sired by up to five different fathers.
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