---
_id: '2846'
abstract:
- lang: eng
text: The Red Queen hypothesis proposes that coevolving parasites select for outcrossing
in the host. Outcrossing relies on males, which often show lower immune investment
due to, for example, sexual selection. Here, we demonstrate that such sex differences
in immunity interfere with parasite-mediated selection for outcrossing. Two independent
coevolution experiments with Caenorhabditis elegans and its microparasite Bacillus
thuringiensis produced decreased yet stable frequencies of outcrossing male hosts.
A subsequent systematic analysis verified that male C. elegans suffered from a
direct selective disadvantage under parasite pressure (i.e. lower resistance,
decreased sexual activity, increased escape behaviour), which can reduce outcrossing
and thus male frequencies. At the same time, males offered an indirect selective
benefit, because male-mediated outcrossing increased offspring resistance, thus
favouring male persistence in the evolving populations. As sex differences in
immunity are widespread, such interference of opposing selective constraints is
likely of central importance during host adaptation to a coevolving parasite.
article_processing_charge: No
author:
- first_name: Leila
full_name: El Masri, Leila
id: 349A6E66-F248-11E8-B48F-1D18A9856A87
last_name: El Masri
- first_name: Rebecca
full_name: Schulte, Rebecca
last_name: Schulte
- first_name: Nadine
full_name: Timmermeyer, Nadine
last_name: Timmermeyer
- first_name: Stefanie
full_name: Thanisch, Stefanie
last_name: Thanisch
- first_name: Lena
full_name: Crummenerl, Lena
last_name: Crummenerl
- first_name: Gunther
full_name: Jansen, Gunther
last_name: Jansen
- first_name: Nico
full_name: Michiels, Nico
last_name: Michiels
- first_name: Hinrich
full_name: Schulenburg, Hinrich
last_name: Schulenburg
citation:
ama: El Masri L, Schulte R, Timmermeyer N, et al. Sex differences in host defence
interfere with parasite-mediated selection for outcrossing during host-parasite
coevolution. Ecology Letters. 2013;16(4):461-468. doi:10.1111/ele.12068
apa: El Masri, L., Schulte, R., Timmermeyer, N., Thanisch, S., Crummenerl, L., Jansen,
G., … Schulenburg, H. (2013). Sex differences in host defence interfere with parasite-mediated
selection for outcrossing during host-parasite coevolution. Ecology Letters.
Wiley-Blackwell. https://doi.org/10.1111/ele.12068
chicago: El Masri, Leila, Rebecca Schulte, Nadine Timmermeyer, Stefanie Thanisch,
Lena Crummenerl, Gunther Jansen, Nico Michiels, and Hinrich Schulenburg. “Sex
Differences in Host Defence Interfere with Parasite-Mediated Selection for Outcrossing
during Host-Parasite Coevolution.” Ecology Letters. Wiley-Blackwell, 2013.
https://doi.org/10.1111/ele.12068.
ieee: L. El Masri et al., “Sex differences in host defence interfere with
parasite-mediated selection for outcrossing during host-parasite coevolution,”
Ecology Letters, vol. 16, no. 4. Wiley-Blackwell, pp. 461–468, 2013.
ista: El Masri L, Schulte R, Timmermeyer N, Thanisch S, Crummenerl L, Jansen G,
Michiels N, Schulenburg H. 2013. Sex differences in host defence interfere with
parasite-mediated selection for outcrossing during host-parasite coevolution.
Ecology Letters. 16(4), 461–468.
mla: El Masri, Leila, et al. “Sex Differences in Host Defence Interfere with Parasite-Mediated
Selection for Outcrossing during Host-Parasite Coevolution.” Ecology Letters,
vol. 16, no. 4, Wiley-Blackwell, 2013, pp. 461–68, doi:10.1111/ele.12068.
short: L. El Masri, R. Schulte, N. Timmermeyer, S. Thanisch, L. Crummenerl, G. Jansen,
N. Michiels, H. Schulenburg, Ecology Letters 16 (2013) 461–468.
date_created: 2018-12-11T11:59:54Z
date_published: 2013-04-04T00:00:00Z
date_updated: 2022-08-25T14:51:57Z
day: '04'
ddc:
- '570'
doi: 10.1111/ele.12068
extern: '1'
file:
- access_level: open_access
checksum: aa7db788f7da7d7f102539a249ebce50
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:15:52Z
date_updated: 2020-07-14T12:45:50Z
file_id: '5176'
file_name: IST-2016-404-v1+1_ele12068.pdf
file_size: 763731
relation: main_file
file_date_updated: 2020-07-14T12:45:50Z
has_accepted_license: '1'
intvolume: ' 16'
issue: '4'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
page: 461 - 468
publication: Ecology Letters
publication_status: published
publisher: Wiley-Blackwell
publist_id: '3948'
pubrep_id: '404'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Sex differences in host defence interfere with parasite-mediated selection
for outcrossing during host-parasite coevolution
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2013'
...