caa a22 4500 445858265 CHVBK 20180317145435.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10592-010-0162-0 doi (NATIONALLICENCE)springer-10.1007/s10592-010-0162-0 Historical isolation and hydrodynamically constrained gene flow in declining populations of the South-African abalone, Haliotis midae [Elektronische Daten] [Aletta Bester-van der Merwe, Rouvay Roodt-Wilding, Filip Volckaert, Maria D'Amato] Over the past two decades, the South African abalone (Haliotis midae), has been under serious threat mainly due to overexploitation. To assure successful management and conservation of wild stocks, the consideration of species-specific evolutionary and population dynamic aspects is critical. In this study, 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. It spans along three biogeographical regions of the South African coastline: temperate in the West coast, warm temperate in the South coast and subtropical in the East coast. Data analysis applying frequentist and Bayesian-based clustering methods indicated weak genetic differentiation between populations of the West, South and East coast. Spatial Bayesian inference further revealed clinal variation along a longitudinal gradient and a transitional zone in the South coast. Coalescent analysis of long-term migration showed restricted interchange among the sampling locations of the South coast while estimates of effective population size were comparable between coastal regions. Furthermore demographic analysis of microsatellite data suggested population expansion, probably reflecting range expansion that occurred following glacial retreat during the Pleistocene. Overall, population structure analysis suggested contemporary (hydrographical conditions) as well as historical (Pleistocene contraction of habitat) restrictions to gene flow. This study provides the foundation for the establishment of an integrated management policy for preserving the natural diversity and adaptive potential of H. midae. Springer Science+Business Media B.V., 2010 Conservation nationallicence Dispersal nationallicence Haliotis midae nationallicence Hydrodynamics nationallicence Microsatellites nationallicence Population differentiation nationallicence SNPs nationallicence Bester-van der Merwe Aletta Molecular Aquatic Research Group, Department of Genetics, Stellenbosch University, 7600, Stellenbosch, South Africa aut Roodt-Wilding Rouvay Molecular Aquatic Research Group, Department of Genetics, Stellenbosch University, 7600, Stellenbosch, South Africa aut Volckaert Filip Laboratory of Animal Diversity and Systematics, Katholieke Universiteit Leuven, 3000, Leuven, Belgium aut D'Amato Maria Forensic DNA Laboratory, Department of Biotechnology, University of the Western Cape, 7535, Belville, South Africa aut Conservation Genetics Springer Netherlands 12/2(2011-04-01), 543-555 1566-0621 12:2<543 2011 12 10592 https://doi.org/10.1007/s10592-010-0162-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10592-010-0162-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bester-van der Merwe Aletta Molecular Aquatic Research Group, Department of Genetics, Stellenbosch University, 7600, Stellenbosch, South Africa aut NATIONALLICENCE 700 1- Roodt-Wilding Rouvay Molecular Aquatic Research Group, Department of Genetics, Stellenbosch University, 7600, Stellenbosch, South Africa aut NATIONALLICENCE 700 1- Volckaert Filip Laboratory of Animal Diversity and Systematics, Katholieke Universiteit Leuven, 3000, Leuven, Belgium aut NATIONALLICENCE 700 1- D'Amato Maria Forensic DNA Laboratory, Department of Biotechnology, University of the Western Cape, 7535, Belville, South Africa aut NATIONALLICENCE 773 0- Conservation Genetics Springer Netherlands 12/2(2011-04-01), 543-555 1566-0621 12:2<543 2011 12 10592 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer