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  • Looking through glassfish: marine genetic structure in an estuarine species

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    51903_1.pdf (528.5Kb)
    Author(s)
    Mills, Courtenay E
    Hadwen, Wade L
    Hughes, Jane M
    Griffith University Author(s)
    Hughes, Jane M.
    Hadwen, Wade L.
    Year published
    2008
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    Abstract
    Through the use of mitochondrial DNA (ATP8 gene), the prediction of intermediate genetic structuring was investigated in two species of estuarine glassfish (Ambassis marianus and Ambassis jacksoniensis) ( Perciformes : Ambassidae) to determine the possibility of a generalised 'estuarine' genetic structure. Individuals were collected from estuaries in eastern Australia between Tin Can Bay (Queensland) in the north and Kempsey ( New South Wales) in the south. Analysis of the haplotype frequencies found in this region suggested panmictic populations with star-like phylogenies with extremely high levels of genetic diversity, but ...
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    Through the use of mitochondrial DNA (ATP8 gene), the prediction of intermediate genetic structuring was investigated in two species of estuarine glassfish (Ambassis marianus and Ambassis jacksoniensis) ( Perciformes : Ambassidae) to determine the possibility of a generalised 'estuarine' genetic structure. Individuals were collected from estuaries in eastern Australia between Tin Can Bay (Queensland) in the north and Kempsey ( New South Wales) in the south. Analysis of the haplotype frequencies found in this region suggested panmictic populations with star-like phylogenies with extremely high levels of genetic diversity, but with no correlation between geographic distance and genetic distance. Non-significant FST and Phi(ST) suggested extensive dispersal among estuaries. However, Tajima's D and Fu's F-S values suggest 'mutation-genetic drift equilibrium' has not been reached, and that population expansions occurring 262 000 (A. marianus) and 300 000 (A. jacksoniensis) years ago may obscure any phylogeographic structuring or isolation by distance. The finding of panmixia was contrary to the prediction of genetic structuring intermediate between that of marine fish (shallowly structured) and freshwater fish (highly structured), suggesting high dispersal capabilities in these species.
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    Journal Title
    Marine and Freshwater Research
    Volume
    59
    Issue
    7
    Publisher URI
    http://www.publish.csiro.au/?nid=126
    DOI
    https://doi.org/10.1071/MF07215
    Copyright Statement
    © 2008 CSIRO. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
    Publication URI
    http://hdl.handle.net/10072/21386
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    • Journal articles

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