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Estimation of multiple male mating frequency using paternity skew: An example from a grey‐sided vole (Myodes rufocanus) population

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Title: Estimation of multiple male mating frequency using paternity skew: An example from a grey‐sided vole (Myodes rufocanus) population
Authors: Wakabayashi, Hiroko Browse this author
Saitoh, Takashi Browse this author →KAKEN DB
Issue Date: 18-Nov-2019
Journal Title: Molecular Ecology Resources
Volume: 20
Issue: 2
Start Page: 444
End Page: 456
Publisher DOI: 10.1111/1755-0998.13120
Abstract: Multiple male mating (MMM) causes sperm competition, which may play an important role in the evolution of reproductive traits. The frequency of multiple paternity (MP), where multiple males sire offspring within a single litter, has been used as an index of MMM frequency. However, MP frequency is necessarily lower than MMM frequency. The magnitude of the difference between MMM and MP frequency depends on litter size (LS) and fertilization probability skew (FPS), and this difference may be meaningfully large in animals with small LSs. In this study, we propose a method to estimate MMM frequency using an individual‐based model with three variables (MP frequency, LS and FPS). We incorporated observed paternity skew data to infer a possible range of FPS that cannot be measured in free‐living populations and tested the validity of our method using a data set from a grey‐sided vole (Myodes rufocanus ) population and from hypothetical populations. MP was found in 50 out of 215 litters (23.3%) in the grey‐sided vole population, while MMM frequency was estimated in 67 of 215 litters (31.2%), with a certainty range of 59–88 (27.4%–40.9%). The point estimation of MMM frequency was realized, and the certainty range was limited within the practical range. The use of observed paternity skew was very effective at narrowing the certainty range of the estimate. Our method could contribute to a deeper understanding of the ecology of MMM in free‐living populations.
Rights: This is the peer reviewed version of the following article:, which has been published in final form at [Link to final article using the 10.1111/1755-0998.13120. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving
Type: article (author version)
Appears in Collections:北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 齊藤 隆

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