---
_id: '1892'
abstract:
- lang: eng
  text: Behavioural variation among conspecifics is typically contingent on individual
    state or environmental conditions. Sex-specific genetic polymorphisms are enigmatic
    because they lack conditionality, and genes causing adaptive trait variation in
    one sex may reduce Darwinian fitness in the other. One way to avoid such genetic
    antagonism is to control sex-specific traits by inheritance via sex chromosomes.
    Here, controlled laboratory crossings suggest that in snail-brooding cichlid fish
    a single locus, two-allele polymorphism located on a sex-linked chromosome of
    heterogametic males generates an extreme reproductive dimorphism. Both natural
    and sexual selection are responsible for exceptionally large body size of bourgeois
    males, creating a niche for a miniature male phenotype to evolve. This extreme
    intrasexual dimorphism results from selection on opposite size thresholds caused
    by a single ecological factor, empty snail shells used as breeding substrate.
    Paternity analyses reveal that in the field parasitic dwarf males sire the majority
    of offspring in direct sperm competition with large nest owners exceeding their
    size more than 40 times. Apparently, use of empty snail shells as breeding substrate
    and single locus sex-linked inheritance of growth are the major ecological and
    genetic mechanisms responsible for the extreme intrasexual diversity observed
    in Lamprologus callipterus.
acknowledgement: "This research was supported by grants of the Swiss National Science
  Foundation to M.T.\r\nWe thank Tetsu Sato for providing field samples, Olivier Goffinet
  for field assistance, Dolores Schütz for vital help in the field and with the manuscript,
  David Lank, Barbara Taborsky, Suzanne Alonzo and two anonymous referees for comments
  on earlier manuscript versions, and the Fisheries Department, Ministry of Agriculture
  and Livestock of Zambia, for permission and support."
article_number: '20140253'
article_processing_charge: No
article_type: original
author:
- first_name: Sabine
  full_name: Ocana, Sabine
  last_name: Ocana
- first_name: Patrick
  full_name: Meidl, Patrick
  id: 4709BCE6-F248-11E8-B48F-1D18A9856A87
  last_name: Meidl
- first_name: Danielle
  full_name: Bonfils, Danielle
  last_name: Bonfils
- first_name: Michael
  full_name: Taborsky, Michael
  last_name: Taborsky
citation:
  ama: Ocana S, Meidl P, Bonfils D, Taborsky M. Y-linked Mendelian inheritance of
    giant and dwarf male morphs in shell-brooding cichlids. <i>Proceedings of the
    Royal Society of London Series B Biological Sciences</i>. 2014;281(1794). doi:<a
    href="https://doi.org/10.1098/rspb.2014.0253">10.1098/rspb.2014.0253</a>
  apa: Ocana, S., Meidl, P., Bonfils, D., &#38; Taborsky, M. (2014). Y-linked Mendelian
    inheritance of giant and dwarf male morphs in shell-brooding cichlids. <i>Proceedings
    of the Royal Society of London Series B Biological Sciences</i>. The Royal Society.
    <a href="https://doi.org/10.1098/rspb.2014.0253">https://doi.org/10.1098/rspb.2014.0253</a>
  chicago: Ocana, Sabine, Patrick Meidl, Danielle Bonfils, and Michael Taborsky. “Y-Linked
    Mendelian Inheritance of Giant and Dwarf Male Morphs in Shell-Brooding Cichlids.”
    <i>Proceedings of the Royal Society of London Series B Biological Sciences</i>.
    The Royal Society, 2014. <a href="https://doi.org/10.1098/rspb.2014.0253">https://doi.org/10.1098/rspb.2014.0253</a>.
  ieee: S. Ocana, P. Meidl, D. Bonfils, and M. Taborsky, “Y-linked Mendelian inheritance
    of giant and dwarf male morphs in shell-brooding cichlids,” <i>Proceedings of
    the Royal Society of London Series B Biological Sciences</i>, vol. 281, no. 1794.
    The Royal Society, 2014.
  ista: Ocana S, Meidl P, Bonfils D, Taborsky M. 2014. Y-linked Mendelian inheritance
    of giant and dwarf male morphs in shell-brooding cichlids. Proceedings of the
    Royal Society of London Series B Biological Sciences. 281(1794), 20140253.
  mla: Ocana, Sabine, et al. “Y-Linked Mendelian Inheritance of Giant and Dwarf Male
    Morphs in Shell-Brooding Cichlids.” <i>Proceedings of the Royal Society of London
    Series B Biological Sciences</i>, vol. 281, no. 1794, 20140253, The Royal Society,
    2014, doi:<a href="https://doi.org/10.1098/rspb.2014.0253">10.1098/rspb.2014.0253</a>.
  short: S. Ocana, P. Meidl, D. Bonfils, M. Taborsky, Proceedings of the Royal Society
    of London Series B Biological Sciences 281 (2014).
date_created: 2018-12-11T11:54:34Z
date_published: 2014-11-07T00:00:00Z
date_updated: 2025-09-29T13:06:15Z
day: '07'
department:
- _id: CampIT
doi: 10.1098/rspb.2014.0253
external_id:
  isi:
  - '000341922700001'
  pmid:
  - '25232141'
intvolume: '       281'
isi: 1
issue: '1794'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4211437/
month: '11'
oa: 1
oa_version: Submitted Version
pmid: 1
publication: Proceedings of the Royal Society of London Series B Biological Sciences
publication_status: published
publisher: The Royal Society
publist_id: '5203'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Y-linked Mendelian inheritance of giant and dwarf male morphs in shell-brooding
  cichlids
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 281
year: '2014'
...