Population genetic structure of the perlemoen Haliotis midae in South Africa: evidence of range expansion and founder events

Evans, Brad S.; Sweijd, Neville; Bowie, Rauri C. K.; Cook, Peter; Elliott, Nicholas

doi:10.3354/meps270163

Cited by 52 publications

(37 citation statements)

References 36 publications

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“…As mudprawn larvae have comparatively high dispersal abilities (confirmed by the absence of isolation by distance within lineages), it is possible that COI alleles shared between the 2 regions would be detected if sample sizes were increased. This is supported by the fact that the South African abalone Haliotis midae (also a planktonic disperser) comprises 2 reproductive stocks, which are separated by Cape Agulhas and share some haplotypes (Evans et al 2004). In contrast to these 2 planktonic dispersers, the isopod Exosphaeroma hylecoetes showed considerable genetic differentiation across the Cape Agulhas boundary, and a second phylogeographic break was found in the region between Cape Columbine (Boundary A on Fig.…”

Section: Western Boundariesmentioning

confidence: 73%

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Impacts of marine biogeographic boundaries on phylogeographic patterns of three South African estuarine crustaceans

Teske¹,

McQuaid²,

Froneman³

et al. 2006

Mar. Ecol. Prog. Ser.

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The South African coastline comprises 3 main biogeographic provinces: (1) the cooltemperate west coast, (2) the warm-temperate south coast, and (3) the subtropical east coast. The boundaries between these regions are defined by changes in species compositions and hydrological conditions. It is possible that these affect phylogeographic patterns of coastal organisms differently, depending on the species' ecologies and modes of dispersal. In the present study, genealogies of 3 estuarine crustaceans, each characterized by a different mode of passive dispersal and present in more than one biogeographic province, were reconstructed using mtDNA COI sequences, and the impacts of biogeographic boundaries on their phylogeographic patterns were compared. The species were (mode of dispersal in brackets): (1) the mudprawn Upogebia africana (planktonic larvae), (2) the isopod Exosphaeroma hylecoetes (adult rafting), and (3) the cumacean Iphinoe truncata (adult drifting). Two major mtDNA lineages with slightly overlapping distributions were identified in U. africana (the species with the highest dispersal potential). The other 2 species had 3 mtDNA lineages each, which were characterized by strict geographic segregation. Phylogeographic breaks in U. africana and E. hylecoetes coincided with biogeographic boundaries, whereas the phylogeographic patterns identified in I. truncata may reflect persistent palaeogeographic patterns. Ecological factors and modes of dispersal are likely to have played a role in both cladogenesis of the different lineages and in the establishment of their present-day distribution patterns.

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Section: Western Boundariesmentioning

confidence: 73%

“…Grant et al 1992, Grant & da Silva-Tatley 1997, Ridgway et al 1999. Evans et al (2004) showed that mtDNA or microsatellites have greater potential to detect genetic structure, but little phylogeographic work using these markers has been done to date (e.g. , Evans et al 2004, Tolley et al 2005.…”

Section: Directions For Future Researchmentioning

confidence: 99%

Impacts of marine biogeographic boundaries on phylogeographic patterns of three South African estuarine crustaceans

Teske¹,

McQuaid²,

Froneman³

et al. 2006

Mar. Ecol. Prog. Ser.

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“…It demonstrates the profound influence that glaciations had on population structure and gene flow even on Southern Hemisphere species. A break in gene flow and range expansion has previously been identified in H. midae by Evans et al (2004) who proposed a westward founder event based on mtDNA and limited microsatellite data. An alternative, more plausible hypothesis presented here is a secondary contact between two historically isolated units, evidenced mainly from the spatial Bayesian clustering analyses and coalescent-based long-term migration rates.…”

Section: Demographic Historymentioning

confidence: 99%

“…Although the larval phase is relatively short, larvae may travel hundreds of kilometres before settlement. As expected, little to no genetic structuring has been reported for many abalone species: H. asinina (Tang et al 2004), H. corrugata (Díaz-Viloria et al 2009), H. cracherodii (Gruenthal and Burton 2008), H. kamtschatkana (Withler et al 2003), H. midae (Evans et al 2004), H. rubra (Temby et al 2007) and H. rufescens (Gruenthal et al 2007). For H. midae specifically, the main oceanographic feature that could influence larval dispersal and subsequent population structuring is the occurrence of major currents along the South African coastline (Turpie et al 2000): the cold northward Benguela current on the West coast and the warm southward Agulhas current on the East coast (Fig.…”

Section: Introductionmentioning

confidence: 99%

Historical isolation and hydrodynamically constrained gene flow in declining populations of the South-African abalone, Haliotis midae

et al. 2010

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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.

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“…In South Africa only six Haliotid species occur, and of these, Haliotis midae Linnaeus is the only one that is commercially exploited (Cook 1998, Sales and Britz 2001, Evans et al 2004. Although the South African abalone fishery has existed since 1949, the first attempt to cultivate H. midae was in 1981 (Genade et al 1988, Sales and Britz 2001, Steinberg 2005.…”

Section: Introductionmentioning

confidence: 99%

Determining the most appropriate feeding regime for the South African abalone Haliotis midae Linnaeus grown on kelp

Francis

Maneveldt

Venter³

Nineteenth International Seaweed Symposium

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Beach-cast kelp (the most widely used feed for commercially grown South African abalone) is plentiful during winter months when periodic storms cause kelp to wash ashore. During summer, however, this resource is not always readily available and farmed abalones are often starved for short periods. The aim of this research was to assess how periodic kelp starvation influences growth of the commercially grown abalone, Haliotis midae Linnaeus. Growth of grow-out abalone was monitored on a commercial abalone farm over a period of six months and consisted of 3 treatments with 2 replicates (n = ±250 abalone per replicate). The treatments were: Control (abalone always given more kelp than what they typically needed); Treatment 1 (abalone fed their weekly ration only once a week); Treatment 2 (abalone fed half their weekly ration every 3 and then 4 days respectively). While the data at first suggest that the control animals outperform the treatment animals, after undergoing an initial adjustment period to the new feeding regime, the treatment animals perform better. Weight gain and feed conversion efficiencies show that the treatment animals perform better overall. The control animals generally required much more feed to produce comparable increases in both length and weight compared to the treatment animals. This study has shown that periodic bouts of starvation is beneficial to Haliotis midae, allowing variable growth spurts when returned to full feed rations.

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Population genetic structure of the perlemoen Haliotis midae in South Africa: evidence of range expansion and founder events

Cited by 52 publications

References 36 publications

Impacts of marine biogeographic boundaries on phylogeographic patterns of three South African estuarine crustaceans

Impacts of marine biogeographic boundaries on phylogeographic patterns of three South African estuarine crustaceans

Historical isolation and hydrodynamically constrained gene flow in declining populations of the South-African abalone, Haliotis midae

Determining the most appropriate feeding regime for the South African abalone Haliotis midae Linnaeus grown on kelp

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