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Strong natural selection in a warning-color hybrid zone

Mallet, J; Barton, NH; (1989) Strong natural selection in a warning-color hybrid zone. Evolution , 43 (2) pp. 421-431.

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Abstract

Frequency-dependent selection on warning color can maintain narrow hybrid zones between unpalatable prey taxa. To measure such selection, Heliconius erato (Lepidoptera: Nymphalidae), were transferred in both directions across a 10-km-wide hybrid zone between Peruvian races differing in color pattern. Survival of experimental butterflies was significantly lower than that of controls. Most selection, measured as differences in survival, occurred soon after release. Selection against foreign morphs was 52% (confidence limits: 25-71%) and was probably due to bird attacks on unusual warning-color morphs. Since only 3 major loci determine the color-pattern differnces, this suggests an average selection coefficient of 0.17 per locus, sufficient to maintain the narrow clines in H. erato. -from Authors

Type: Article
Title: Strong natural selection in a warning-color hybrid zone
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Genetics, Evolution and Environment
URI: http://discovery.ucl.ac.uk/id/eprint/1571479
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