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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Detection of molecular signatures of selection at microsatellite loci in the South African abalone (Haliotis midae) using a population genomic approach
TL;DR: Various candidate loci under selection showed significant inter-chromosomal linkage disequilibrium, suggesting possible gene-networks underling adaptive phenotypes, whilst several loci had significant hits to known genes when performing BLAST searches to NCBI's non-redundant databases, whilst others are known to be derived from expressed sequences even though homology to a known gene could not be established.
Journal ArticleDOI
Life in a rock pool: Radiation and population genetics of myxozoan parasites in hosts inhabiting restricted spaces.
Pavla Bartošová-Sojková,Alena Lövy,Cecile Reed,Martina Lisnerová,Martina Lisnerová,Tereza Tomková,Astrid S. Holzer,Astrid S. Holzer,Ivan Fiala,Ivan Fiala +9 more
TL;DR: While fish host specificity had little impact on parasite population structure, the habitat preference of the alternate invertebrate host as well as tidal water exchange may be additional crucial variables affecting the dispersal and associated population structure of C. cottoidii.
Journal ArticleDOI
Molecular approaches uncover cryptic diversity in intertidal Ligia isopods (Crustacea, Isopoda, Ligiidae) across the southern Africa coastline
TL;DR: The presence of cryptic lineages within Ligia species in the region that suggest the need for taxonomic reevaluation of these isopod species in southern Africa are reported.
Dissertation
Population genetic structure and demographical history of South African abalone, Haliotis midae, in a conservation context
Van der Merwe,Aletta Elizabeth +1 more
TL;DR: This study reported the first microsatellite and Single Nucleotide Polymorphism (SNP) markers developed specifically for Haliotis midae, which gave evidence for subtle differentiation between West and East coast populations that correlates with a hydrogeographic barrier in the vicinity of Cape Agulhas.
Journal ArticleDOI
Broad-scale genetic patterns of New Zealand abalone, Haliotis iris, across a distribution spanning 13° latitude and major oceanic water masses.
TL;DR: Low, but significant, levels of genetic differentiation are found in the population genetic structure of the New Zealand black-foot abalone by genotyping nine microsatellite loci in 485 pāua from 27 locations distributed across mainland New Zealand and the Chatham Islands.
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