Gene flow distances in natural populations of Tetraopes tetraophthalmus

The generation-wide gene flow distance, l, was measured in the milkweed beetle Tetraopes tetraophthalmus by a mark-recapture technique. Following the suggestion of Endler (1979), estimates of gene flow derived from dispersal information alone were modified by incorporation of age-specific survivorsh...

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Bibliographic Details
Published in:Evolution 1983-11, Vol.37 (6), p.1239-1246
Main Author: McCauley, D.E
Format: Article
Language:English
Subjects:
Adult insects
animal breeding
animal genetics
arthropods
Beetles
Cerambycidae
Drosophila
Eggs
entomology
Fecundity
Female animals
Gene flow
Insect genetics
Male animals
Mating behavior
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Summary:The generation-wide gene flow distance, l, was measured in the milkweed beetle Tetraopes tetraophthalmus by a mark-recapture technique. Following the suggestion of Endler (1979), estimates of gene flow derived from dispersal information alone were modified by incorporation of age-specific survivorship and fecundity patterns into the estimate. Such gene flow estimates were taken for two populations; one where the host plant was uniformly and closely spaced and one where it was subdivided into small patches. No effect of habitat structure on movement patterns was found as gene flow distances were very similar at the two sites. Estimates derived from dispersal information alone placed the gene flow distance at about 48 m in males and 40 m in females. Consideration of the life history parameters caused these estimates to be reduced by about 23% in males and 40% in females. This very limited gene flow could allow for genetic differentiation of populations on a small geographic scale.
ISSN:0014-3820
1558-5646
DOI:10.1111/j.1558-5646.1983.tb00240.x