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Decreased relatedness between male prickly forest skinks (Gnypetoscincus queenslandiae) in habitat fragments

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Abstract

In species with low levels of dispersal the chance of closely related individuals breeding may be a potential problem; sex-biased dispersal is a mechanism that may decrease the possibility of cosanguineous mating. Fragmentation of the habitat in which a species lives may affect mechanisms such as sex-biased dispersal, which may in turn exacerbate more direct effects of fragmentation such as decreasing population size that may lead to inbreeding depression. Relatedness statistics calculated using microsatellite DNA data showed that rainforest fragmentation has had an effect on the patterns of dispersal in the prickly forest skink (Gnypetoscincus queenslandiae), a rainforest endemic of the Wet Tropics of north eastern Australia. A lower level of relatedness was found in fragments compared to continuous forest sites due to a significantly lower level of pairwise relatedness between males in rainforest fragments. The pattern of genetic relatedness between sexes indicates the presence of male-biased dispersal in this species, with a stronger pattern detected in populations in rainforest fragments. Male prickly forest skinks may have to move further in fragmented habitat in order to find mates or suitable habitat logs.

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  1. Joanna Sumner

    Present address: School of Biological Sciences, University of Wollongong, 2522, NSW, Australia

Authors and Affiliations

  1. Department of Zoology and Entomology, University of Queensland, St Lucia, Qld, 4072, Australia

    Joanna Sumner

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  1. Joanna Sumner
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Correspondence to Joanna Sumner.

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Sumner, J. Decreased relatedness between male prickly forest skinks (Gnypetoscincus queenslandiae) in habitat fragments. Conserv Genet 6, 333–340 (2005). https://doi.org/10.1007/s10592-005-4959-1

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  • DOI: https://doi.org/10.1007/s10592-005-4959-1

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