Ecological crossovers of sexual signaling in a migratory bird

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Teerikorpi , P E , Sirkiä , P M & Laaksonen , T 2018 , ' Ecological crossovers of sexual signaling in a migratory bird ' , Evolution , vol. 72 , no. 10 , pp. 2038-2048 . https://doi.org/10.1111/evo.13515

Title: Ecological crossovers of sexual signaling in a migratory bird
Author: Teerikorpi, Pauliina Elisabet; Sirkiä, Paivi Maria; Laaksonen, Toni
Contributor organization: Zoology
Finnish Museum of Natural History
Date: 2018-10
Language: eng
Number of pages: 11
Belongs to series: Evolution
ISSN: 0014-3820
DOI: https://doi.org/10.1111/evo.13515
URI: http://hdl.handle.net/10138/325591
Abstract: Environmental shifts may induce sudden reversals in the relative quality or sexual attractiveness of mates (ecological crossovers) leading to non-directional sexual selection. Studies on such ecological crossovers induced by environmental shifts during the nonbreeding season are particularly rare. We studied the interactive effects between nonbreeding conditions and a male white wing patch on the breeding success of breeding pairs and the local survival of females in a migratory passerine population over a 32-year period. After dry winters, females paired with large-patched males were more likely to survive than those paired with small-patched males, and vice versa after moist winters. Moreover, after dry winters, large-patched males succeeded in attracting females that laid large clutches, while small-patched males bred with females that laid small clutches, and vice versa after moist winters. This phenomenon led to a difference in fledgling numbers only during years with dry winters and high precipitation during the breeding season. The selection on this male trait and its signaling value to females thus depended on a complex interaction between conditions both at the nonbreeding and breeding grounds. We show that it is important to consider conditions during the nonbreeding season when examining the effects of sexual ornaments on fitness.
Subject: Carry-over effect
climate change
fluctuating selection
mate choice
NAO index
seasonal interactions
NORTH-ATLANTIC OSCILLATION
PALEARCTIC MIGRANTS
MALE COMPETITION
CLIMATE-CHANGE
MATE CHOICE
BADGE SIZE
SELECTION
COLORATION
FLYCATCHERS
PRECIPITATION
1181 Ecology, evolutionary biology
1172 Environmental sciences
Peer reviewed: Yes
Rights: unspecified
Usage restriction: openAccess
Self-archived version: acceptedVersion


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