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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Phylogeography of the green turtle, Chelonia mydas, in the Southwest Indian Ocean
Molecular Ecology, Volume 16, No. 1, Year 2007
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Description
Patterns of mitochondrial DNA (mtDNA) variation were used to analyse the population genetic structure of southwestern Indian Ocean green turtle (Chelonia mydas) populations. Analysis of sequence variation over 396 bp of the mtDNA control region revealed seven haplotypes among 288 individuals from 10 nesting sites in the Southwest Indian Ocean. This is the first time that Atlantic Ocean haplotypes have been recorded among any Indo-Pacific nesting populations. Previous studies indicated that the Cape of Good Hope was a major biogeographical barrier between the Atlantic and Indian Oceans because evidence for gene flow in the last 1.5 million years has yet to emerge. This study, by sampling localities adjacent to this barrier, demonstrates that recent gene flow has occurred from the Atlantic Ocean into the Indian Ocean via the Cape of Good Hope. We also found compelling genetic evidence that green turtles nesting at the rookeries of the South Mozambique Channel (SMC) and those nesting in the North Mozambique Channel (NMC) belong to separate genetic stocks. Furthermore, the SMC could be subdivided in two different genetic stocks, one in Europa and the other one in Juan de Nova. We suggest that this particular genetic pattern along the Mozambique Channel is attributable to a recent colonization from the Atlantic Ocean and is maintained by oceanic conditions in the northern and southern Mozambique Channel that influence early stages in the green turtle life cycle. © 2006 The Authors.
Authors & Co-Authors
Bourjea, Jérôme
France, Plouzane
Ifremer Institut Francais de Recherche Pour L'exploitation de la Mer
Lapègue, Sylvie
France, Plouzane
Ifremer Institut Francais de Recherche Pour L'exploitation de la Mer
Gagnevin, Lionel
France, Paris
Cirad
Broderick, Damien
Australia, Brisbane
The University of Queensland
Mortimer, Jeanne A.
Seychelles
Ministry of Environment and Natural Resources
Ciccione, Stéphane
Reunion
Centre D'etude et de Découverte Des Tortues Marines de la Réunion Cedtm
Roos, David S.
France, Plouzane
Ifremer Institut Francais de Recherche Pour L'exploitation de la Mer
Taquet, Coralie
France, Plouzane
Ifremer Institut Francais de Recherche Pour L'exploitation de la Mer
Grizel, Henri
France, Plouzane
Ifremer Institut Francais de Recherche Pour L'exploitation de la Mer
Statistics
Citations: 112
Authors: 9
Affiliations: 5
Identifiers
Doi:
10.1111/j.1365-294X.2006.03122.x
ISSN:
09621083
e-ISSN:
1365294X
Research Areas
Genetics And Genomics
Study Design
Cross Sectional Study
Study Locations
Mozambique