Food availability as a major driver in the evolution of life-history strategies of sibling species.

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State: Public
Version: Final published version
Serval ID
serval:BIB_C7F135C067CE
Type
Article: article from journal or magazin.
Collection
Publications
Title
Food availability as a major driver in the evolution of life-history strategies of sibling species.
Journal
Ecology and Evolution
Author(s)
Arlettaz R., Christe P., Schaub M.
ISSN
2045-7758 (Print)
ISSN-L
2045-7758
Publication state
Published
Issued date
2017
Peer-reviewed
Oui
Volume
7
Number
12
Pages
4163-4172
Language
english
Abstract
Life-history theory predicts trade-offs between reproductive and survival traits such that different strategies or environmental constraints may yield comparable lifetime reproductive success among conspecifics. Food availability is one of the most important environmental factors shaping developmental processes. It notably affects key life-history components such as reproduction and survival prospect. We investigated whether food resource availability could also operate as an ultimate driver of life-history strategy variation between species. During 13 years, we marked and recaptured young and adult sibling mouse-eared bats (Myotis myotis and Myotis blythii) at sympatric colonial sites. We tested whether distinct, species-specific trophic niches and food availability patterns may drive interspecific differences in key life-history components such as age at first reproduction and survival. We took advantage of a quasi-experimental setting in which prey availability for the two species varies between years (pulse vs. nonpulse resource years), modeling mark-recapture data for demographic comparisons. Prey availability dictated both adult survival and age at first reproduction. The bat species facing a more abundant and predictable food supply early in the season started its reproductive life earlier and showed a lower adult survival probability than the species subjected to more limited and less predictable food supply, while lifetime reproductive success was comparable in both species. The observed life-history trade-off indicates that temporal patterns in food availability can drive evolutionary divergence in life-history strategies among sympatric sibling species.

Keywords
age at first reproduction, bats, demography, life‐history trade‐off, multistate capture–recapture model, survival
Pubmed
Web of science
Open Access
Yes
Create date
07/07/2017 9:09
Last modification date
20/08/2019 15:43
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