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Genetic homogeneity and circum-Antarctic distribution of two benthic shrimp species in the Southern Ocean, Chorismus antarcticus and Nematocarcinus lanceopes

By Michael J. Raupach, Sven Thatje, Johannes Dambach, Peter Rehm, Bernhard Misof and Florian Leese

Abstract

During the last years, molecular studies revealed significant population differentiation and cryptic species within various benthic and pelagic marine Antarctic taxa. This is unexpected due to the lack of obvious barriers to gene flow and strong current systems. Using mitochondrial (COI, 16S rDNA) and nuclear (28S rDNA: D2) gene fragments, we tested whether two circum-Antarctic benthic shrimps with planktotrophic larvae, Chorismus antarcticus and Nematocarcinus lanceopes, show patterns of regional differentiation. For both species, the 16S and the 28S fragment were invariant. However, for COI we found 24 different haplotypes for Chorismus antarcticus and 54 for Nematocarcinus lanceopes. No significant differentiation was observed among populations or regions. Furthermore, we found signatures of a population expansion in the late Pleistocene hinting at an impact of large-scale glaciations in particular on the shallow-water shrimp Chorismus antarcticus, supporting a (re)colonization and demographic expansion of this shrimp species in response to climate oscillation.<br/>Electronic supplementary material: The online version of this article (doi:10.1007/s00227-010-1451-3) contains supplementary material, which is available to authorized users

Topics: QH301, GC
Year: 2010
DOI identifier: 10.1007/s00227-010-1451-3)
OAI identifier: oai:eprints.soton.ac.uk:72254
Provided by: e-Prints Soton

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Citations

  1. (1998). New dates and new rates for divergence across the Isthmus of Panama. Proc R Soc Lond B 265:2257– 2263. doi:10.1098/rspb.1998.0568 doi
  2. (2002). PAUP*: phylogenetic analysis using parsimony (*and other methods), version 4.0b10. Sinauer Associates, Sunderland Tajima F
  3. (2008). Population subdivision in the Antarctic toothWsh (Dissostichus mawsoni) revealed by mitochondrial and nuclear single nucleotide polymorphisms (SNPs). Antarct Sci 20:327–338. doi:10.1017/S095410200800965
  4. (1997). Restricted gene Xow and evolutionary divergence between geographically separated populations of the Antarctic octopus Pareledone turqueti. Mar Biol 129:97–102. doi:10.1007/s002270050150 Altschul doi
  5. (1995). Stone crabs close to the Antarctic continent: Lithodes murrayi Henderson, 1888 (Crustacea; Decapoda; Anomura) oV Peter I Island (68°51’S, doi
  6. (2000). TCS: a computer program to estimate gene genealogies. Mol Ecol 9:1657–1660. doi:10.1046/ j.1365-294x.2000.01020
  7. (1999). Why hunter-gatherer populations do not show sign of Pleistocene demographic expansions. doi

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