Natural selection for earlier male arrival to breeding grounds through direct and indirect effects in a migratory songbird

Show full item record



Permalink

http://hdl.handle.net/10138/162263

Citation

Velmala , W , Helle , S , Ahola , M P , Klaassen , M , Lehikoinen , E , Rainio , K , Sirkiä , P & Laaksonen , T 2015 , ' Natural selection for earlier male arrival to breeding grounds through direct and indirect effects in a migratory songbird ' Ecology and Evolution , vol. 5 , no. 6 , pp. 1205-1213 . DOI: 10.1002/ece3.1423

Title: Natural selection for earlier male arrival to breeding grounds through direct and indirect effects in a migratory songbird
Author: Velmala, William; Helle, Samuli; Ahola, Markus P.; Klaassen, Marcel; Lehikoinen, Esa; Rainio, Kalle; Sirkiä, Päivi; Laaksonen, Toni
Contributor: University of Helsinki, Zoology
University of Helsinki, Finnish Museum of Natural History
University of Helsinki, Zoology
University of Helsinki, Eläinmuseo (-2009)
Date: 2015-03
Language: eng
Number of pages: 9
Belongs to series: Ecology and Evolution
ISSN: 2045-7758
URI: http://hdl.handle.net/10138/162263
Abstract: For migratory birds, the earlier arrival of males to breeding grounds is often expected to have fitness benefits. However, the selection differential on male arrival time has rarely been decomposed into the direct effect of male arrival and potential indirect effects through female traits. We measured the directional selection differential on male arrival time in the pied flycatcher (Ficedula hypoleuca) using data from 6years and annual number of fledglings as the fitness proxy. Using structural equation modeling, we were able to take into account the temporal structure of the breeding cycle and the hierarchy between the examined traits. We found directional selection differentials for earlier male arrival date and earlier female laying date, as well as strong selection differential for larger clutch size. These selection differentials were due to direct selection only as indirect selection for these traits was nonsignificant. When decomposing the direct selection for earlier male arrival into direct and indirect effects, we discovered that it was almost exclusively due to the direct effect of male arrival date on fitness and not due to its indirect effects via female traits. In other words, we showed for the first time that there is a direct effect of male arrival date on fitness while accounting for those effects that are mediated by effects of the social partner. Our study thus indicates that natural selection directly favored earlier male arrival in this flycatcher population.
Subject: Fitness
life history
microevolution
seasonal interactions
sexual selection
timing of migration
PIED FLYCATCHER
REPRODUCTIVE SUCCESS
CICONIA-CICONIA
CLIMATE-CHANGE
BARN SWALLOW
LONG-TERM
BIRD
DATE
PROTANDRY
FITNESS
1181 Ecology, evolutionary biology
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
Velmala_et_al_2015_Ecology_and_Evolution.pdf 192.8Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record