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The Population Structure of Erebia Epipsodea (Lepidoptera: Satyrinae)
- Brussard, Peter F., Ehrlich, Paul R.
- Ecology 1970 v.51 no.1 pp. 119-129
- Lepidoptera, butterflies, population structure
- The satyrine butterfly Erebia epipsodea shows a population structure unlike that of any other butterfly studied in detail. Rather than being divided into numerous small populations which only rarely exchange individuals, E. epipsodea occurs in vast, effectively panmictic populations which may cover hundreds of square kilometers. There is a great deal of individual movement, and the butterflies are able to recognize and leave ecologically unsuitable areas. Such areas do not, however, seem to pose substantial barriers to their movement.