Population genetic structure of the perlemoen Haliotis midae in South Africa: evidence of range expansion and founder events
Reads0
Chats0
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
More filters
Journal Article
Genetic analysis of the Octopus vulgaris population on the coast of South Africa
TL;DR: These data do not, therefore, refute the hypothesis of a single O. vulgarisl/Ig genetic population around the coast, and all sequences conformed to a single haplotype.
Journal ArticleDOI
Genetic evidence for different scales of connectivity in a marine mollusc
TL;DR: The results suggest that recruitment occurs primarily over a small spatial scale in a species that also has the ability to disperse over considerably greater distances, including abalone Haliotis coc- coradiata, a broadcast spawner with a short larval stage.
Journal ArticleDOI
Development and application of genomic tools to the restoration of green abalone in southern California
Kristen M. Gruenthal,Kristen M. Gruenthal,David A. Witting,Tom Ford,M. J. Neuman,Jonathan P. Williams,Daniel J. Pondella,A. Bird,N. Caruso,John R. Hyde,Lisa W. Seeb,Wesley A. Larson +11 more
TL;DR: To help mitigate a drop in Ne due to hatchery supplementation, it is recommended collection and replacement of ≥100 wild abalone per generation for broodstock and close management of the proportion of cultured individuals in the wild.
Journal ArticleDOI
Climate Change, Genetics or Human Choice: Why Were the Shells of Mankind's Earliest Ornament Larger in the Pleistocene Than in the Holocene?
TL;DR: The decrease in fossil shell size from Pleistocene to Holocene was likely due to increased temperatures as a result of climate change at the beginning of the present interglacial period, and N. kraussianus fossil shells can therefore serve as indicators of the climatic conditions that were prevalent in a particular region at the time when they were deposited.
Journal ArticleDOI
Low to moderate levels of genetic differentiation detected across the distribution of the New Zealand abalone, Haliotis iris
TL;DR: Two regions of the mitochondrial genome were used to examine the population genetic structure of New Zealand’s endemic abalone and high genetic diversity and weak genetic structure may be a general feature of abalone potentially reflecting large and/or ancient populations.
References
More filters
Journal ArticleDOI
Estimating F-statistics for the analysis of population structure.
Bruce S. Weir,C. Clark Cockerham +1 more
TL;DR: The purpose of this discussion is to offer some unity to various estimation formulae and to point out that correlations of genes in structured populations, with which F-statistics are concerned, are expressed very conveniently with a set of parameters treated by Cockerham (1 969, 1973).
Book
Molecular Evolutionary Genetics
TL;DR: Recent developments of statistical methods in molecular phylogenetics are reviewed and it is shown that the mathematical foundations of these methods are not well established, but computer simulations and empirical data indicate that currently used methods produce reasonably good phylogenetic trees when a sufficiently large number of nucleotides or amino acids are used.
Journal ArticleDOI
GENEPOP (Version 1.2): Population Genetics Software for Exact Tests and Ecumenicism
Michel Raymond,François Rousset +1 more
Journal ArticleDOI
Genetic distance between populations
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.
Book
Molecular Markers, Natural History, and Evolution
TL;DR: A history of Molecular Phylogenetics and applications of individuality and Parentage, issues of Heterozygosity, and special Approaches to Phylageny Estimation are reviewed.