Population genetic structure of the perlemoen Haliotis midae in South Africa: evidence of range expansion and founder events
TLDR
It is concluded that populations of H. midae on either side of Cape Agulhas represent 2 independent reproductive stocks, and the area of transition between the stocks coincides with oceanographic features of the region.Abstract:
Genetic diversity in Haliotis midae, a highly valued and heavily exploited marine gastropod, was assessed using 3 marker types across samples from the species' range in South Africa. Variation was compared at 7 allozyme loci, 2 regions of mitochondrial DNA and 3 microsatellite loci. We conclude that populations of H. midae on either side of Cape Agulhas represent 2 independent reproductive stocks. The area of transition between the stocks coincides with oceanographic features of the region. Evidence from all 3 types of genetic marker indicates an isolated introduction event to the east of Cape Agulhas, and subsequent range expansion in an easterly direction. The disparity between allozyme data and the other 2 forms is seen as further evidence for the presence of balanc- ing selection at allozyme loci.read more
Citations
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Significant population structure and asymmetric gene flow patterns amidst expanding populations of Clinus cottoides (Perciformes, Clinidae): application of molecular data to marine conservation planning in South Africa
TL;DR: Neutrality tests and mismatch distributions suggest recent population expansions, with the exception of peripheral western and eastern populations (possibly a consequence of environmental extremes at the edge of the species distribution).
Journal ArticleDOI
Mitochondrial DNA Sequence and Gene Organization in the Australian Blacklip Abalone Haliotis rubra (Leach)
TL;DR: The complete mitochondrial DNA of the blacklip abalone Haliotis rubra was cloned and 16,907 base pairs were sequenced, and sequences from the ATP8, NAD2, NAD4L, NAD6, and 12S rRNA genes, as well as the control region, are the most variable among representatives from Mollusca, Arthropoda, and Rhynchonelliformea.
Journal ArticleDOI
Range‐wide genetic homogeneity in the California sea mussel (Mytilus californianus): a comparison of allozymes, nuclear DNA markers, and mitochondrial DNA sequences
TL;DR: The genetic uniformity exhibited by M. californianus may result from a combination of extensive gene flow and the lack of exposure to strong selective gradients across its range, which is different from similar studies on other mytilids.
Journal ArticleDOI
Zoogeography of intertidal communities in the West Indian Ocean as determined by ocean circulation systems: patterns from the Tetraclita barnacles.
TL;DR: The hypothesis that the distribution and connectivity of intertidal animals in the WIO are determined by the major oceanographic regime but less influenced by historical events such as Pleistocene glaciations is supported.
Journal ArticleDOI
Historical isolation and hydrodynamically constrained gene flow in declining populations of the South-African abalone, Haliotis midae
TL;DR: In this paper, eight microsatellites and 12 single nucleotide polymorphic loci (SNPs) were applied to determine genetic structure in nine populations sampled throughout the species' natural distribution range.
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Michel Raymond,François Rousset +1 more
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TL;DR: If enough data are available, genetic distance between any pair of organisms can be measured in terms of D, and this measure is applicable to any kind of organism without regard to ploidy or mating scheme.
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TL;DR: A history of Molecular Phylogenetics and applications of individuality and Parentage, issues of Heterozygosity, and special Approaches to Phylageny Estimation are reviewed.