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Intra-and intersexual differences in parasite resistance and female fitness tolerance in a polymorphic insect

Willink Castro, Beatriz LU and Svensson, Erik I. LU (2017) In Proceedings of the Royal Society B: Biological Sciences 284(1847).
Abstract

To understand host–parasite interactions, it is necessary to quantify variation and covariation in defence traits. We quantified parasite resistance and fitness tolerance of a polymorphic damselfly (Ischnura elegans), an insectwith three discrete female colour morphs but with monomorphic males. We quantified sex and morph differences in parasite resistance (prevalence and intensity of water mite infections) and morph-specific fitness tolerance in the females in natural populations for over a decade. Therewas no evidence for higher parasite susceptibility in males as a cost of sexual selection, whereas differences in defence mechanisms between female morphs are consistent with correlational selection operating on combinations of parasite... (More)

To understand host–parasite interactions, it is necessary to quantify variation and covariation in defence traits. We quantified parasite resistance and fitness tolerance of a polymorphic damselfly (Ischnura elegans), an insectwith three discrete female colour morphs but with monomorphic males. We quantified sex and morph differences in parasite resistance (prevalence and intensity of water mite infections) and morph-specific fitness tolerance in the females in natural populations for over a decade. Therewas no evidence for higher parasite susceptibility in males as a cost of sexual selection, whereas differences in defence mechanisms between female morphs are consistent with correlational selection operating on combinations of parasite resistance and tolerance. We suggest that tolerance differences between female morphs interact with frequency-dependent sexual conflict, which maintains the polymorphism locally. Host–parasite interactions can therefore shape intra-and intersexual phenotypic divergence and interfere with sexual selection and sexual conflict.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Frequency-dependence, Parasites, Polymorphism, Resistance, Sexual conflict, Tolerance
in
Proceedings of the Royal Society B: Biological Sciences
volume
284
issue
1847
publisher
Royal Society
external identifiers
  • scopus:85011081858
  • wos:000393414300007
ISSN
0962-8452
DOI
10.1098/rspb.2016.2407
language
English
LU publication?
yes
id
44cd362b-1570-442c-b05d-5a32b89157fa
date added to LUP
2017-02-14 14:03:54
date last changed
2018-03-18 05:09:30
@article{44cd362b-1570-442c-b05d-5a32b89157fa,
  abstract     = {<p>To understand host–parasite interactions, it is necessary to quantify variation and covariation in defence traits. We quantified parasite resistance and fitness tolerance of a polymorphic damselfly (Ischnura elegans), an insectwith three discrete female colour morphs but with monomorphic males. We quantified sex and morph differences in parasite resistance (prevalence and intensity of water mite infections) and morph-specific fitness tolerance in the females in natural populations for over a decade. Therewas no evidence for higher parasite susceptibility in males as a cost of sexual selection, whereas differences in defence mechanisms between female morphs are consistent with correlational selection operating on combinations of parasite resistance and tolerance. We suggest that tolerance differences between female morphs interact with frequency-dependent sexual conflict, which maintains the polymorphism locally. Host–parasite interactions can therefore shape intra-and intersexual phenotypic divergence and interfere with sexual selection and sexual conflict.</p>},
  articleno    = {20162407},
  author       = {Willink Castro, Beatriz and Svensson, Erik I.},
  issn         = {0962-8452},
  keyword      = {Frequency-dependence,Parasites,Polymorphism,Resistance,Sexual conflict,Tolerance},
  language     = {eng},
  month        = {01},
  number       = {1847},
  publisher    = {Royal Society},
  series       = {Proceedings of the Royal Society B: Biological Sciences},
  title        = {Intra-and intersexual differences in parasite resistance and female fitness tolerance in a polymorphic insect},
  url          = {http://dx.doi.org/10.1098/rspb.2016.2407},
  volume       = {284},
  year         = {2017},
}