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    Limited contemporary gene flow and high self-replenishment drives peripheral isolation in an endemic coral reef fish

    Access Status
    Fulltext not available
    Authors
    van der Meer, M.
    Horne, J.
    Gardener, M.
    Hobbs, Jean-Paul
    Prachett, M.
    Van Herwerden, L.
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    van der Meer, M. and Horne, J. and Gardener, M. and Hobbs, J. and Prachett, M. and Van Herwerden, L. 2013. Limited contemporary gene flow and high self-replenishment drives peripheral isolation in an endemic coral reef fish. Ecology and Evolution. 3 (6): pp. 1653-1666.
    Source Title
    Ecology and Evolution
    Additional URLs
    http://onlinelibrary.wiley.com/doi/10.1002/ece3.584/full
    ISSN
    2045-7758
    URI
    http://hdl.handle.net/20.500.11937/8561
    Collection
    • Curtin Research Publications
    Abstract

    Extensive ongoing degradation of coral reef habitats worldwide has lead to declines in abundance of coral reef fishes and local extinction of some species. Those most vulnerable are ecological specialists and endemic species. Determining connectivity between locations is vital to understanding recovery and long-term persistence of these species following local extinction. This study explored population connectivity in the ecologically-specialized endemic three-striped butterflyfish (Chaetodon tricinctus) using mt and msatDNA (nuclear microsatellites) to distinguish evolutionary versus contemporary gene flow, estimate self-replenishment and measure genetic diversity among locations at the remote Australian offshore coral reefs of Middleton Reef (MR), Elizabeth Reef (ER), Lord Howe Island (LHI), and Norfolk Island (NI). Mt and msatDNA suggested genetic differentiation of the most peripheral location (NI) from the remaining three locations (MR, ER, LHI). Despite high levels of mtDNA gene flow, there is limited msatDNA gene flow with evidence of high levels of self-replenishment (=76%) at all four locations. Taken together, this suggests prolonged population recovery times following population declines. The peripheral population (NI) is most vulnerable to local extinction due to its relative isolation, extreme levels of self-replenishment (95%), and low contemporary abundance.

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