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Strong male⁄male competition allows for nonchoosy females: high levels of polygynandry in a territorial frog with paternal care

Ursprung, E, Ringler, M, Jehle, R and Hoedl, W 2011, 'Strong male⁄male competition allows for nonchoosy females: high levels of polygynandry in a territorial frog with paternal care' , Molecular Ecology, 20 (8) , pp. 1759-1711.

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    Abstract

    Our knowledge about genetic mating systems and the underlying causes for and consequences of variation in reproductive success has substantially improved in recent years. When linked to longitudinal population studies, cross-generational pedigrees across wild populations can help answer a wide suite of questions in ecology and evolutionary biology. We used microsatellite markers and exhaustive sampling of two successive adult generations to obtain population-wide estimates of individual reproductive output of males and females in a natural population of the Neotropical frog Allobates femoralis (Aromobatidae), a pan-Amazonian species that features prolonged iteroparous breeding, male territoriality and male parental care. Parentage analysis revealed a polygynandrous mating system in which high proportions of males (35.5%) and females (56.0%) produced progeny that survived until adulthood. Despite contrasting reproductive strategies, successfully reproducing males and females had similar numbers of mating partners that sired the adult progeny (both sexes: median 2; range 1– 6); the numbers of their offspring that reached adulthood were also similar (both sexes: median 2; range 1–8). Measures of reproductive skew indicate selection on males only for their opportunity to breed. Reproductive success was significantly higher in territorial than in nonterritorial males, but unrelated to territory size in males or to body size in both sexes. We hypothesize that female polyandry in this species has evolved because of enhanced offspring survival when paternal care is allocated to multiple partners.

    Item Type: Article
    Uncontrolled Keywords: Allobates femoralis, anurans, mating system, parentage analysis, reproductive success
    Themes: Subjects outside of the University Themes
    Schools: Colleges and Schools > College of Science & Technology > School of Environment and Life Sciences > Ecosystems and Environment Research Centre
    Colleges and Schools > College of Science & Technology > School of Environment and Life Sciences
    Journal or Publication Title: Molecular Ecology
    Publisher: Blackwell Publishing
    Refereed: Yes
    ISSN: 0962-1083
    Depositing User: R Jehle
    Date Deposited: 28 Sep 2011 10:53
    Last Modified: 24 Sep 2013 10:38
    URI: http://usir.salford.ac.uk/id/eprint/17755

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