focus
As an evolutionary biologist I focus on small mammals. My research has concentrated on rapid evolution, both genetic and morphological. I have found very rapid size changes in deer mice on the California Channel Islands and white-footed mice in NE Illinois over time spans as little as 30 years.
Much of my genetic work has been possible because I have been successful in utilizing DNA from museum skins. I have found complete genetic replacement occurring in conjunction with the morphological changes. It is so far unclear whether selection, plasticity, migration or some combination are responsible.
Pergams, O. R. W. and J. L. Lawler. 2009. Recent and widespread rapid morphological change in rodents. PLoS One: http://dx.plos.org/10.1371/journal.pone.0006452.
Pergams, O. R. W. and R. C. Lacy. 2007. Rapid morphological and genetic change in Chicago-area Peromyscus. Molecular Ecology 17:450–463.
Pergams, O. R. W. and M. V. Ashley. 2001. Microevolution in island rodents. Genetica 112/113:245-256.