Temperature drives pre-reproductive selection and shapes the biogeography of a female polymorphism

Erik I. Svensson* (Corresponding Author), Beatriz Willink, Mary Catherine Duryea, Lesley T. Lancaster

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)
11 Downloads (Pure)

Abstract

Conflicts of interests between males and females over reproduction is a universal feature of sexually reproducing organisms and has driven the evolution of intersexual mimicry, mating behaviours and reproductive polymorphisms. Here, we show how temperature drives pre-reproductive selection in a female colour polymorphic insect that is subject to strong sexual conflict. These species have three female colour morphs, one of which is a male mimic. This polymorphism is maintained by frequency-dependent sexual conflict caused by male mating harassment. The frequency of female morphs varies geographically, with higher frequency of the male mimic at higher latitudes. We show that differential temperature sensitivity of the female morphs and faster sexual maturation of the male mimic increases the frequency of this morph in the north. These results suggest that sexual conflict during the adult stage is shaped by abiotic factors and frequency-independent pre-reproductive selection that operate earlier during ontogeny of these female morphs.
Original languageEnglish
Pages (from-to)149-159
Number of pages11
JournalEcology Letters
Volume23
Issue number1
Early online date6 Nov 2019
DOIs
Publication statusPublished - Jan 2020

Bibliographical note

Acknowledgements
We are grateful to the many field assistants, PhD students and postdocs who have participated in the field work and thereby directly and indirectly contributed to this study over many years, since 2000 when it was started. We also wish to thank David and Rosalyn Sparrow who kindly hosted B. Willink during a field trip to Cyprus in 2017 and who provided valuable field work help and guidance, enabling us to gather information about morph frequencies of I. elegans at one of the southernmost localities of this species in Europe.

Funding information
Funding for this study has been provided by research grants from The Swedish Research Council (VR: grant no. 2016‐03356), Carl Tryggers Foundation (CTS), Gyllenstiernska Krapperupstiftelsen (grant no. KR2018‐0038), Stina Werners Foundation and Erik Philip Sörensens Stiftelse to E.I.S.

Keywords

  • Biogeography
  • climate
  • colour polymorphism
  • frequency-dependent selection
  • ontogeny
  • pre-reproductive selection
  • sexual conflict
  • temperature
  • RAMBUR ODONATA
  • SEXUAL CONFLICT
  • FREQUENCY-DEPENDENT SELECTION
  • EVOLUTIONARY DYNAMICS
  • ANTAGONISTIC COEVOLUTION
  • COLOR POLYMORPHISM
  • COSTS
  • RESISTANCE
  • INHERITANCE
  • DAMSELFLIES

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