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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Molecular evidence for long-distance colonization in an Indo-Pacific seahorse lineage
Marine Ecology Progress Series, Volume 286, Year 2005
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Description
Mitochondrial control region (mtDNA CR) diversity within and among 6 seahorse populations associated with the Indo-Pacific Hippocampus kuda complex (H. kuda from India, Malaysia, Indonesia and the Philippines, H. fuscus from the Red Sea and H. capensis from South Africa) was compared to determine whether there was support for the hypothesis that seahorses are able to colonize remote areas by means of rafting. Analyses performed on the data-set included phylogenetic reconstructions, estimation of relative population ages, tests for evidence of population expansion, pair-wise migration rates and divergence times, as well as relationships between genetic and geographic distances. The mtDNA data indicate that all populations have undergone recent expansions, but that the timing of these events differed. The H. kuda population from India was found to be the oldest, whereas the expansion of the H. fuscus population from the Red Sea took place most recently. The fact that all seahorse populations studied are characterized by a single ancestral mtDNA haplotype and migration rates are low in most cases, as well as the fact that no significant relationship between genetic and geographic distances was found, indicates that colonization of distant habitats by a small number of founding individuals may be common in seahorses associated with the H. kuda complex. As the level of subsequent gene flow among populations is low, this may result in rapid speciation. © Inter-Research 2005.
Authors & Co-Authors
Teske, Peter R.
South Africa, Stellenbosch
Stellenbosch University
South Africa, Grahamstown
Rhodes University
Hamilton, Healy H.
United States, San Francisco
California Academy of Sciences
United States, Berkeley
University of California, Berkeley
PalsbØll, Per Jakob
United States, Berkeley
University of California, Berkeley
Choo, Chee K.
Malaysia, Terengganu,
Universiti Malaysia Terengganu
Gabr, Howaida R.
Egypt, Ismailia
Suez Canal University
Lourie, Sara A.
Canada, Montreal
Université Mcgill
Santos, Melchor
Philippines, Quezon City
University of the Philippines Diliman
Sreepada, Anantha
India, Goa
National Institute of Oceanography India
Cherry, Michael I.
South Africa, Stellenbosch
Stellenbosch University
Matthee, Conrad A.
South Africa, Stellenbosch
Stellenbosch University
Statistics
Citations: 98
Authors: 10
Affiliations: 9
Identifiers
Doi:
10.3354/meps286249
Research Areas
Genetics And Genomics
Study Design
Cross Sectional Study
Study Locations
South Africa