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Marine Biodiversity

, Volume 49, Issue 1, pp 521–526 | Cite as

Phylogeography of Noah’s giant clam

  • Cécile FauvelotEmail author
  • Serge Andréfouët
  • Daphné Grulois
  • Josina Tiavouane
  • Colette C. C. Wabnitz
  • Hélène Magalon
  • Philippe Borsa
Short Communication

Abstract

Noah’s giant clam (Tridacna noae), recently resurrected from synonymy with T. maxima, occurs from Christmas Island to the Northern Line Islands and from the Ryukyu Islands to New Caledonia. We used mitochondrial and microsatellite markers to investigate the phylogeographic structure and demographic history of T. noae over most of its geographical range. Results from the two types of markers reveal a consistent population structure, partitioning T. noae into three distinct lineages: (1) eastern half of the Indo-Malay archipelago and Western Australia, (2) Melanesia and Micronesia, and (3) Central Polynesia. Demographic expansion initiated between 300,000 and 400,000 years ago, as was detected for each haplogroup. This pattern, which is congruent with other co-occurring Tridacna species, indicates a shared evolutionary history with expansion from past refuges following late-Pleistocene sea-level changes.

Keywords

Tridacna Evolutionary history Mitochondrial DNA Microsatellite Indo-Pacific 

Notes

Acknowledgments

We thank P. Bosserelle (Wallis), J. Butscher (New Caledonia), P. Dor (Yap), C. Payri (Madang), M. Sapatu (Samoa), M. Savins (Kiribati), M. Selch (Kosrae) and B.-W. Su (Dongsha) for assistance in obtaining giant clam biopsies. Sampling in New Caledonia was carried out during the BIBELOT cruise (doi: http://dx.doi.org/10.17600/13100100). Local communities, Ian Bertram (SPC) and staff from fisheries offices and relevant government institutions in SPC member countries are acknowledged for their kind support and cooperation in obtaining samples and required permits. Sample collection and/or shipment was in part facilitated by a grant from the Australian Government (DFAT) to SPC’s FAME division. Genetic analyses were co-funded by the BeN-Co project (ZoNéCo Program, New Caledonia) and the TriMax project (Laboratoire d’excellence CORAIL, Agence nationale de la recherche, France). Raw microsatellite data can be found at https://figshare.com/articles/Tridacna_noae_microsatellite_genotypes/5264266. This is ENTROPIE contribution #181.

Supplementary material

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ESM 1 (PDF 823 kb)
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ESM 3 (PDF 753 kb)

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Copyright information

© Senckenberg Gesellschaft für Naturforschung and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.UMR ENTROPIE (IRD, Université de La Réunion, CNRS), Laboratoire d’excellence CORAIL, Centre IRD de NouméaNoumea CedexNew Caledonia
  2. 2.Université Côte d’Azur, CNRS, FRE 3729 ECOMERSNiceFrance
  3. 3.Secretariat of the Pacific CommunityNouméaNew Caledonia
  4. 4.Changing Ocean Research Unit, Institute for the Oceans and FisheriesUniversity of British Columbia, Aquatic Ecosystems Research LaboratoryVancouverCanada
  5. 5.UMR ENTROPIE (Université de La Réunion, CNRS, IRD), Laboratoire d’excellence CORAILUniversité de La RéunionLa RéunionFrance

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