You are not currently logged in.
Access your personal account or get JSTOR access through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Population Differentiation in Euphydryas editha Butterflies: Larval Adaptation to Different Hosts
Mark D. Rausher
Vol. 36, No. 3 (May, 1982), pp. 581-590
Published by: Society for the Study of Evolution
Stable URL: http://www.jstor.org/stable/2408102
Page Count: 10
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Evidence from laboratory rearing experiments on two populations of the checkerspot butterfly Euphydryas editha that use different host species indicate that the populations differ in characteristics associated with adaptation of larvae to growth on their food plants. Larvae from each population grow relatively faster and survive better when grown on their own primary host species than do larvae from the other population when grown on the same species. This pattern of specialization is not caused by differences in feeding behavior, but appears to be due to differences in digestive physiology.
Evolution © 1982 Society for the Study of Evolution