News From the Field
Monarch Butterflies Help Explain Why Parasites Harm Hosts
May 14, 2008
A new University of Georgia and Emory University study of monarch butterflies and the microscopic parasites that hitch a ride on them finds that the parasites strike a middle ground between the benefits gained by reproducing rapidly and the costs to their hosts. The study, published in the online edition of the journal Proceedings of the National Academy of Sciences, provides the first empirical evidence in a natural system of what's called the "trade-off hypothesis."
University of Georgia
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