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Host Plant Choice Determined by Reproductive Interference between Closely Related Butterflies.

Publication ,  Journal Article
Ohsaki, N; Ohata, M; Sato, Y; Rausher, MD
Published in: The American naturalist
October 2020

AbstractA number of empirical studies have concluded that reproductive interference (RI) contributes to parapatric species distributions or sexual exclusion. However, the possibility that divergent host plant use in phytophagous insects is due to sexual exclusion has seldom been considered. Here, we present evidence that RI is responsible for different host plant use by two Pierid butterfly species, Pieris napi and Pieris melete. When a novel host species was introduced about 50 years ago, two Pierid butterfly species at first used both the ancestral host species and the novel one. Subsequently, P. napi shifted to use only the novel host, while P. melete shifted to specialize on the ancestral host. To explain these patterns, we investigated whether the two host species differ in suitability for larval growth and survival. Additionally, we tested whether RI occurred between the two butterfly species using large outdoor field cages. Courtship of females by conspecific and heterospecific males reduces the number of eggs laid by approximately half. However, RI is asymmetric and would generate selection on P. melete females to evolve to avoid the more suitable host species preferred by P. napi. Thus, our study suggests that sexual exclusion can explain the shift in host plant use by these two butterfly species.

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Published In

The American naturalist

DOI

EISSN

1537-5323

ISSN

0003-0147

Publication Date

October 2020

Volume

196

Issue

4

Start / End Page

512 / 523

Related Subject Headings

  • Sexual Behavior, Animal
  • Rorippa
  • Reproductive Isolation
  • Oviposition
  • Male
  • Larva
  • Herbivory
  • Female
  • Ecology
  • Cardamine
 

Citation

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Ohsaki, N., Ohata, M., Sato, Y., & Rausher, M. D. (2020). Host Plant Choice Determined by Reproductive Interference between Closely Related Butterflies. The American Naturalist, 196(4), 512–523. https://doi.org/10.1086/710211
Ohsaki, Naota, Masaaki Ohata, Yoshibumi Sato, and Mark D. Rausher. “Host Plant Choice Determined by Reproductive Interference between Closely Related Butterflies.The American Naturalist 196, no. 4 (October 2020): 512–23. https://doi.org/10.1086/710211.
Ohsaki N, Ohata M, Sato Y, Rausher MD. Host Plant Choice Determined by Reproductive Interference between Closely Related Butterflies. The American naturalist. 2020 Oct;196(4):512–23.
Ohsaki, Naota, et al. “Host Plant Choice Determined by Reproductive Interference between Closely Related Butterflies.The American Naturalist, vol. 196, no. 4, Oct. 2020, pp. 512–23. Epmc, doi:10.1086/710211.
Ohsaki N, Ohata M, Sato Y, Rausher MD. Host Plant Choice Determined by Reproductive Interference between Closely Related Butterflies. The American naturalist. 2020 Oct;196(4):512–523.
Journal cover image

Published In

The American naturalist

DOI

EISSN

1537-5323

ISSN

0003-0147

Publication Date

October 2020

Volume

196

Issue

4

Start / End Page

512 / 523

Related Subject Headings

  • Sexual Behavior, Animal
  • Rorippa
  • Reproductive Isolation
  • Oviposition
  • Male
  • Larva
  • Herbivory
  • Female
  • Ecology
  • Cardamine