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Selection on multiple sexual signals in two Central and Eastern European populations of the barn swallow
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SYSNO ASEP 0508851 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Selection on multiple sexual signals in two Central and Eastern European populations of the barn swallow Author(s) Pap, P. L. (RO)
Fülöp, A. (RO)
Adámková, Marie (UBO-W) SAI, ORCID, RID
Cepák, J. (CZ)
Michálková, R. (CZ)
Safran, R. J. (US)
Stermin, A. N. (RO)
Tomášek, Oldřich (UBO-W) RID, ORCID, SAI
Vágási, C. I. (RO)
Vincze, O. (RO)
Wilkins, M. R. (US)
Albrecht, Tomáš (UBO-W) RID, SAI, ORCIDNumber of authors 12 Source Title Ecology and Evolution. - : Wiley - ISSN 2045-7758
Roč. 9, č. 19 (2019), s. 11277-11287Number of pages 11 s. Language eng - English Country US - United States Keywords reproductive success ; plumage coloration ; ornaments ; barn swallow ; Hirundo rustica rustica ; sexual selection ; tail length ; ventral coloration Subject RIV EH - Ecology, Behaviour OECD category Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology R&D Projects GA15-11782S GA ČR - Czech Science Foundation (CSF) GA19-22538S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UBO-W - RVO:68081766 UT WOS 000485004100001 EID SCOPUS 85071752040 DOI 10.1002/ece3.5629 Annotation Variation in intensity and targets of sexual selection on multiple traits has been suggested to play a major role in promoting phenotypic differentiation between populations, although the divergence in selection may depend on year, local conditions or age. In this study, we quantified sexual selection for two putative sexual signals across two Central and East European barn swallow (Hirundo rustica rustica) populations from Czech Republic and Romania over multiple years. We then related these differences in selection to variation in sexual characters among barn swallow populations. Our results show that tail length and ventral coloration vary between populations, sexes, and age classes (first-time breeders vs. experienced birds). We found that selection on tail length was stronger in first-time breeders than in experienced birds and in males than in females in the Romanian population, while these differences between age groups and sexes were weak in Czech birds. We suggest that the populational difference in selection on tail length might be related to the differences in breeding conditions. Our results show that ventral coloration is darker (i.e., has lower brightness) in the Romanian than in the Czech population, and in experienced birds and males compared with first-time breeders and females, respectively. The sexual difference in ventral coloration may suggest sexual selection on this trait, which is supported by the significant directional selection of ventral coloration in first-time breeding males on laying date. However, after controlling for the confounding effect of wing length and tarsus length, the partial directional selection gradient on this trait turned nonsignificant, suggesting that the advantage of dark ventral coloration in early breeding birds is determined by the correlated traits of body size. These findings show that ventral coloration may be advantageous over the breeding season, but the underlying mechanism of this relationship is not clarified. Workplace Institute of Vertebrate Biology Contact Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Year of Publishing 2020 Electronic address http://dx.doi.org/10.1002/ece3.5629
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