Tagging Eagles with Feather DNA

Andrew DeWoody studies eagles by using DNA in their feathers to track their movements and habits. This technique allows DeWoody to study larger populations and prevents injuries to birds because they aren't captured.
(Image credit: Purdue Agricultural Communication photo/Tom Campbell)

This ScienceLives article was provided to LiveScience in partnership with the National Science Foundation.

Andrew DeWoody, a Purdue University professor of genetics, leads a research group that is using molecular markers to study otherwise cryptic aspects of biology. For example, he has found an alternative to the daunting task of catching eagles to study the majestic birds. DeWoody collects their feathers and uses the small amount of DNA in them to create a tag that corresponds to a particular bird. Those tags can be used to determine population size, parentage, roosting patterns and sex ratios. In other research, his group is interested in how natural and sexual selection act in concert to maintain variation of a large collection of genes called the "major histocompatibility complex" (MHC) in wild populations of animals. Immunologists have long known that MHC genes play key roles in the immune response, but more recently behavioral ecologists have learned that the genes also influence how animals choose their mates. His findings have shown that female tiger salamanders select a mate based on a complex process that takes many factors, such as body size, into account. For more on the research, see the Purdue press releases hyper linked above. For more on DeWoody, read his responses to the ScienceLives 10 Questions below.

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