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Non-adaptive" hilltopping behavior in male checkerspot butterflies (Euphydryas editha)

Authors: Ehrlich, P. R.; Wheye, D. R.
Year: 1986
Journal: American Naturalist, Vol. 127, pp. 477-483
Publisher: UNKNOWN
DOI: 10.1086/284496
Keywords: ANIMAL BEHAVIOR, ENTOMOLOGY, EVOLUTION, RMBL

Abstract

A fluorescent-dye technique permitted the mating success of male checkerspot butterflies aggregating on a ridge to be compared with that of males on the slope below. Unexpectedly, the males on the ridge had about one-half the mating success of those on the slope. We suggest that formation of this and some other hilltopping aggregations is a "nonadaptive" consequence of otherwise adaptive behavior.

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