---
_id: '3653'
abstract:
- lang: eng
  text: 'Frequency-dependent selection on warning color can maintain narrow hybrid
    zones between unpalatable prey taxa. To measure such selection, we transferred
    marked Heliconius erato (Lepidoptera: Nymphalidae) in both directions across a
    10-km-wide hybrid zone between Peruvian races differing in color pattern. These
    experimental H. erato were released at four sites, along with control H. erato
    of the phenotype native to each site. Survival of experimental butterflies was
    significantly lower than that of controls at two sites and overall. 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 (more than 10% of the recaptures had beak
    marks). Since only three major loci determine the color-pattern differences, this
    suggests an average selection coefficient of 0.17 per locus, sufficient to maintain
    the narrow clines in H. erato.'
acknowledgement: We thank G.Lamas for sharing his knowledge of the Tarapoto hybrid
  zone;  M.A.Arboleda, H.Eeley, S.Knapp, M.Muedas, and J.Santisteban for their help
  in the field;  P.Donnelly and C.Smith for statistical advice; and S.Jones, S.Knapp,
  G.Lamas, and the reviewers for helpful comments on the manuscript. We are grateful
  to the Natural Environment Research Council, the Royal Society, and the Nuffield
  Foundation for funding this research.
article_processing_charge: No
article_type: original
author:
- first_name: James
  full_name: Mallet, James
  last_name: Mallet
- first_name: Nicholas H
  full_name: Barton, Nicholas H
  id: 4880FE40-F248-11E8-B48F-1D18A9856A87
  last_name: Barton
  orcid: 0000-0002-8548-5240
citation:
  ama: Mallet J, Barton NH. Strong natural selection in a warning color hybrid zone.
    <i>Evolution</i>. 1989;43(2):421-431. doi:<a href="https://doi.org/10.2307/2409217
    ">10.2307/2409217 </a>
  apa: Mallet, J., &#38; Barton, N. H. (1989). Strong natural selection in a warning
    color hybrid zone. <i>Evolution</i>. Wiley-Blackwell. <a href="https://doi.org/10.2307/2409217
    ">https://doi.org/10.2307/2409217 </a>
  chicago: Mallet, James, and Nicholas H Barton. “Strong Natural Selection in a Warning
    Color Hybrid Zone.” <i>Evolution</i>. Wiley-Blackwell, 1989. <a href="https://doi.org/10.2307/2409217
    ">https://doi.org/10.2307/2409217 </a>.
  ieee: J. Mallet and N. H. Barton, “Strong natural selection in a warning color hybrid
    zone,” <i>Evolution</i>, vol. 43, no. 2. Wiley-Blackwell, pp. 421–431, 1989.
  ista: Mallet J, Barton NH. 1989. Strong natural selection in a warning color hybrid
    zone. Evolution. 43(2), 421–431.
  mla: Mallet, James, and Nicholas H. Barton. “Strong Natural Selection in a Warning
    Color Hybrid Zone.” <i>Evolution</i>, vol. 43, no. 2, Wiley-Blackwell, 1989, pp.
    421–31, doi:<a href="https://doi.org/10.2307/2409217 ">10.2307/2409217 </a>.
  short: J. Mallet, N.H. Barton, Evolution 43 (1989) 421–431.
date_created: 2018-12-11T12:04:27Z
date_published: 1989-01-01T00:00:00Z
date_updated: 2022-02-14T11:00:42Z
day: '01'
doi: '10.2307/2409217 '
extern: '1'
external_id:
  pmid:
  - '28568556 '
intvolume: '        43'
issue: '2'
language:
- iso: eng
main_file_link:
- url: https://www.jstor.org/stable/2409217?origin=crossref&seq=1#metadata_info_tab_contents
month: '01'
oa_version: None
page: 421 - 431
pmid: 1
publication: Evolution
publication_identifier:
  eissn:
  - 1558-5646
  issn:
  - 0014-3820
publication_status: published
publisher: Wiley-Blackwell
publist_id: '2730'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Strong natural selection in a warning color hybrid zone
type: journal_article
user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17
volume: 43
year: '1989'
...