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Título

Fecundity selection does not vary along a large geographical cline of trait means in a passerine bird

Autor Sarkiä, P.M.; Adamík, P.; Atemyev, A. V.; Belskii, E.; Both, Christiaan; Burês, S.; Burgess, M.D.; Bushuev, A.V.; Forsman, JT; Grinkov, V.; Hoffmann, D.; Järvinen, A.; Král, M.; Krams, I.; Lampe, H.M.; Moreno Klemming, Juan ; Mägi, M.; Nord, A.; Potti, Jaime ; Ravussin, Pierre Alain; Sokolov, Leonid V.; Laaksonen, T.
Palabras clave Coloration
Fitness
Melanin
Ornamentation
Phenotype
Plumage
Species variation
Fecha de publicación 2015
EditorLinnean Society of London
Citación Biological Journal of the Linnean Society, Volume 114, Issue 4, 1 April 2015, Pages 808-827
ResumenLocal environmental and ecological conditions are commonly expected to result in local adaptation, although there are few examples of variation in phenotypic selection across continent-wide spatial scales. We collected standardized data on selection with respect to the highly variable plumage coloration of pied flycatcher (Ficedula hypoleucaPall.) males from 17 populations across the species' breeding range. The observed selection on multiple male coloration traits via the annual number of fledged young was generally relatively weak. The main aim of the present study, however, was to examine whether the current directional selection estimates are associated with distance to the sympatric area with the collared flycatcher (Ficedula albicollisTemminck), a sister species with which the pied flycatcher is showing character displacement. This pattern was expected because plumage traits in male pied flycatchers are changing with the distance to these areas of sympatry. However, we did not find such a pattern in current selection on coloration. There were no associations between current directional selection on ornamentation and latitude or longitude either. Interestingly, current selection on coloration traits was not associated with the observed mean plumage traits of the populations. Thus, there do not appear to be geographical gradients in current directional fecundity selection on male plumage ornamentation. The results of the present study do not support the idea that constant patterns in directional fecundity selection would play a major role in the maintenance of coloration among populations in this species. By contrast, the tendency for relatively weak mosaic-like variation in selection among populations could reflect just a snapshot of temporally variable, potentially environment-dependent, selection, as suggested by other studies in this system. Such fine-grained variable selection coupled with gene flow could maintain extensive phenotypic variation across populations.
Versión del editorhttp://dx.doi.org/ 10.1111/bij.12469
URI http://hdl.handle.net/10261/112709
DOI10.1111/bij.12469
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