Data from: Extra-pair paternity and the variance in male fitness in song sparrows (Melospiza melodia)

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Lebigre, Christophe; Arcese, Peter; Sardell, Rebecca J.; Keller, Lukas F.; Reid, Jane M., 2012, "Data from: Extra-pair paternity and the variance in male fitness in song sparrows (Melospiza melodia)", https://doi.org/10.5683/SP2/KGBAPT, Borealis, V1
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Abstract
The variance in fitness across population members can influence major evolutionary processes. In socially monogamous but genetically polygynandrous species, extra-pair paternity (EPP) is widely hypothesized to increase the variance in male fitness compared to that arising given the socially monogamous mating system. This hypothesis has not been definitively tested because comprehensive data describing males’ apparent (social) and realized (genetic) fitness have been lacking. We used 16 years of comprehensive social and genetic paternity data for an entire free-living song sparrow (Melospiza melodia) population to quantify and compare variances in male apparent and realized fitness, and to quantify the contribution of the variances in within-pair and extra-pair reproductive success and their covariance to the variance in realized fitness. Overall, EPP increased the variance in male fitness by only 0-27% across different fitness and variance measures. This relatively small effect reflected the presence of socially unpaired males with zero apparent and low realized fitness, small covariance between within- and extra-pair reproductive success and large variance in within-pair reproductive success that was relatively unaffected by EPP. Therefore, although EPP altered individual males’ contributions to future generations, its impact on population-level parameters such as the opportunity for selection and effective population size was limited. (2020-06-24)
Usage notes
summary data ARSData describing variation in male annual reproductive successsummary data LRSData describing variation in male lifetime reproductive success and fitness (2020-06-24)
Subject Other
Keyword Melospiza melodia, Variance in fitness, polyandry, opportunity for selection, extra-pair reproduction
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Dryad version number: 1

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Data describing variation in male annual reproductive success
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summary data LRS.txt
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Published May 19, 2021
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Data describing variation in male lifetime reproductive success and fitness
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