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Local variation of within-host clonal diversity coupled with genetic homogeneity in a marine trematode

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Abstract

Despite their ubiquity and importance to intertidal ecosystems, information is currently lacking regarding the genetic diversity of trematode parasites within coastal organisms and the distribution of their genetic variation among intertidal habitats. In this study, we quantified the clonal diversity of the coastal marine trematode Maritrema novaezealandensis within Zeacumantus subcarinatus snail hosts from three coastal bays in Otago Harbour, New Zealand, using five microsatellite loci to determine if differences exist in the frequency of occurrence of multi-clone infections. In addition, we examined gene flow among M. novaezealandensis collected from the three bays. The frequency of mixed-clone infections varied fourfold among bays and no genetic differentiation was detected among intertidal bays. Across the coastal bays studied, M. novaezealandensis comprises a single population that is potentially infecting multiple Z. subcarinatus populations with varying life history traits.

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Acknowledgments

We are grateful to Tommy Leung for assistance with trematode species identifications. Funding for this research was provided by the Royal Society of New Zealand’s Marsden Fund. Kim Bryan-Walker was supported by a University of Otago summer research bursary grant. All experiments performed during this study comply with the current laws of New Zealand.

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Authors and Affiliations

  1. Department of Zoology, University of Otago, P.O. Box 56, Dunedin, 9054, New Zealand

    Devon B. Keeney, Kim Bryan-Walker, Tania M. King & Robert Poulin

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  1. Devon B. Keeney
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  2. Kim Bryan-Walker
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  3. Tania M. King
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  4. Robert Poulin
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Correspondence to Devon B. Keeney.

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Communicated by T. Reusch.

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Keeney, D.B., Bryan-Walker, K., King, T.M. et al. Local variation of within-host clonal diversity coupled with genetic homogeneity in a marine trematode. Mar Biol 154, 183–190 (2008). https://doi.org/10.1007/s00227-008-0914-2

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