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Predator-Mediated Natural Selection on the Wings of the Damselfly Calopteryx splendens: Differences in Selection among Trait Types

Kuchta, Shawn R. and Svensson, Erik LU (2014) In American Naturalist 184(1). p.91-109
Abstract
Traits that increase mating success in males may come at a cost, such as an increased risk of predation. However, predator-mediated selection is challenging to document in natural populations, hampering our understanding of the trade-offs between sexual selection and predation. Here we report on a study of predator-mediated natural selection on wing traits in the damselfly Calopteryx splendens, the males of which possess conspicuous wing patches. Wagtails (genus Motacilla) are important avian predators of C. splendens, capturing them in flight and removing the wings prior to consumption. Using geometric morphometric techniques, we quantified the strength and mode of selection on wing traits by comparing wings from depredated individuals... (More)
Traits that increase mating success in males may come at a cost, such as an increased risk of predation. However, predator-mediated selection is challenging to document in natural populations, hampering our understanding of the trade-offs between sexual selection and predation. Here we report on a study of predator-mediated natural selection on wing traits in the damselfly Calopteryx splendens, the males of which possess conspicuous wing patches. Wagtails (genus Motacilla) are important avian predators of C. splendens, capturing them in flight and removing the wings prior to consumption. Using geometric morphometric techniques, we quantified the strength and mode of selection on wing traits by comparing wings from depredated individuals with the standing variation present in the population. Our results reveal that predator-mediated selection is stronger on secondary sexual characters than on size and shape, suggesting that traits related to flight performance are closer to their adaptive peaks. This could be a consequence of the long-term evolutionary association with avian predators, whereas stronger selection on conspicuous secondary sexual traits may reflect trade-offs between sexual and natural selection. Finally, even though C. splendens possesses nearly identical fore-and hindwings, we found evidence for divergent selection between them. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
fitness landscape, geometric morphometrics, predation, secondary sexual, trait, selection gradient, selective agent
in
American Naturalist
volume
184
issue
1
pages
91 - 109
publisher
University of Chicago Press
external identifiers
  • wos:000337736700009
  • scopus:84902668643
ISSN
0003-0147
DOI
10.1086/676043
project
BECC
language
English
LU publication?
yes
id
2bc67587-82de-4f01-94f5-ce624f9df280 (old id 4609323)
date added to LUP
2014-08-26 11:41:09
date last changed
2017-11-12 03:15:15
@article{2bc67587-82de-4f01-94f5-ce624f9df280,
  abstract     = {Traits that increase mating success in males may come at a cost, such as an increased risk of predation. However, predator-mediated selection is challenging to document in natural populations, hampering our understanding of the trade-offs between sexual selection and predation. Here we report on a study of predator-mediated natural selection on wing traits in the damselfly Calopteryx splendens, the males of which possess conspicuous wing patches. Wagtails (genus Motacilla) are important avian predators of C. splendens, capturing them in flight and removing the wings prior to consumption. Using geometric morphometric techniques, we quantified the strength and mode of selection on wing traits by comparing wings from depredated individuals with the standing variation present in the population. Our results reveal that predator-mediated selection is stronger on secondary sexual characters than on size and shape, suggesting that traits related to flight performance are closer to their adaptive peaks. This could be a consequence of the long-term evolutionary association with avian predators, whereas stronger selection on conspicuous secondary sexual traits may reflect trade-offs between sexual and natural selection. Finally, even though C. splendens possesses nearly identical fore-and hindwings, we found evidence for divergent selection between them.},
  author       = {Kuchta, Shawn R. and Svensson, Erik},
  issn         = {0003-0147},
  keyword      = {fitness landscape,geometric morphometrics,predation,secondary sexual,trait,selection gradient,selective agent},
  language     = {eng},
  number       = {1},
  pages        = {91--109},
  publisher    = {University of Chicago Press},
  series       = {American Naturalist},
  title        = {Predator-Mediated Natural Selection on the Wings of the Damselfly Calopteryx splendens: Differences in Selection among Trait Types},
  url          = {http://dx.doi.org/10.1086/676043},
  volume       = {184},
  year         = {2014},
}