Microevolution, Guppies

[Dr. Dalek]

Here is an interesting article from the University of Maine website. It is about a reasearcher from Maine studying gene flow and microevolution in Trinidad.

The subjects of his studies are guppies, small fish that live in the rivers. Apparently they show varyation among seperate populations. The guppies near areas with high numbers of preadators are all light colors, but ones further up the river and above the waterfalls, where predidation is light, are brighter colors.

The article seems to indicate that microevolution can bring about large changes bringing about new speciation faster than normal.

 

http://www.umaine.edu/features/archive/v11/evolving.htm