SELECTION AND THE MAINTENANCE OF A COLOUR PATTERN POLYMORPHISM IN THE GREEN SWORDTAIL (XIPHOPHORUS HELLERI)

SELECTION AND THE MAINTENANCE OF A COLOUR PATTERN POLYMORPHISM IN THE GREEN SWORDTAIL... SELECTION AND THE MAINTENANCE OF A COLOUR PATTERN POLYMORPHISM IN THE GREEN SWORDTAIL (XIPHOPHORUS HELLERI) 1 by DIERK FRANCK 2,4) , MARION DIKOMEY 2) and MANFRED SCHARTL 3,5) ( 2 Zoologisches Institut und Zoologisches Museum der Universität, Arbeitsbereich Ethologie, Martin-Luther-King-Platz3, D-20146 Hamburg, Germany; 3 Theodor-Boveri-Institutfür Biowissenschaften der Universität, Physiologische Chemie I, Am Hubland, D-97074 Würzburg, Germany) (Acc. 25-I-2001) Summary Many Xiphophorus populations include a number of individuals with black spots on body sides or Ž ns. In many cases such spots are composed of extremely large melanophore cells, the so-called macromelanophores. Macromelanophore pattern polymorphism is known in 10 out of 22 Xiphophorus species. In at least 8 species alleles of the macromelanophore determining locus Mdl are intimately linked to a dominant oncogene, ONC-X mrk , which can give rise to malignant skin tumors (melanoma). We present, for the Ž rst time, evidence that macromelanophore pattern polymorphisms may be maintained by selection in a seasonally variable environment. In school-choice experiments single Xiphophorus helleri females spent more time with groups of spotted females than with non-spotted females under turbid, but not under clear water conditions. Similarly, receptive females preferred spotted males in turbid, but not in clear water. Thus, in http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Behaviour Brill

SELECTION AND THE MAINTENANCE OF A COLOUR PATTERN POLYMORPHISM IN THE GREEN SWORDTAIL (XIPHOPHORUS HELLERI)

Behaviour, Volume 138 (4): 467 – Jan 1, 2001

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Publisher
Brill
Copyright
© 2001 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0005-7959
eISSN
1568-539X
DOI
10.1163/156853901750382115
Publisher site
See Article on Publisher Site

Abstract

SELECTION AND THE MAINTENANCE OF A COLOUR PATTERN POLYMORPHISM IN THE GREEN SWORDTAIL (XIPHOPHORUS HELLERI) 1 by DIERK FRANCK 2,4) , MARION DIKOMEY 2) and MANFRED SCHARTL 3,5) ( 2 Zoologisches Institut und Zoologisches Museum der Universität, Arbeitsbereich Ethologie, Martin-Luther-King-Platz3, D-20146 Hamburg, Germany; 3 Theodor-Boveri-Institutfür Biowissenschaften der Universität, Physiologische Chemie I, Am Hubland, D-97074 Würzburg, Germany) (Acc. 25-I-2001) Summary Many Xiphophorus populations include a number of individuals with black spots on body sides or Ž ns. In many cases such spots are composed of extremely large melanophore cells, the so-called macromelanophores. Macromelanophore pattern polymorphism is known in 10 out of 22 Xiphophorus species. In at least 8 species alleles of the macromelanophore determining locus Mdl are intimately linked to a dominant oncogene, ONC-X mrk , which can give rise to malignant skin tumors (melanoma). We present, for the Ž rst time, evidence that macromelanophore pattern polymorphisms may be maintained by selection in a seasonally variable environment. In school-choice experiments single Xiphophorus helleri females spent more time with groups of spotted females than with non-spotted females under turbid, but not under clear water conditions. Similarly, receptive females preferred spotted males in turbid, but not in clear water. Thus, in

Journal

BehaviourBrill

Published: Jan 1, 2001

Keywords: POLYMORPHISM; TURBIDITY; MACROMELANOPHORE COLOUR PATTERNS; GENETIC HITCH-HIKING; XIPHOPHORUS HELLERI

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