The Malay Peninsula as a barrier to gene flow in an Asian horseshoe crab species,Carcinoscorpius rotundicauda Latreille |
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| Institution: | 1. Departamento de Ecologia, Instituto de Ciências Biológicas, Universidade de Brasília (UnB), Campus Darcy Ribeiro, 70910-900, Brasília, DF, Brazil;2. UMR EDB, IRD 253, CNRS 5174, UPS, ENFA – Université Paul Sabatier, 118 route de Narbonne, F-31062 Toulouse, France;3. Netherlands Institute for Sea Research (NIOZ), P.O. Box 140, 4400 AC Yerseke, The Netherlands;1. Institute of Marine Sciences Portsmouth University, UK;2. Department of Life & Environmental Sciences, Bournemouth University, UK;1. Diyarbakir Plant Protection Research Station, Diyarbakir, Turkey;2. Department of Plant Protection, Faculty of Agriculture, Insect Molecular Biology Laboratory, Ankara University, 06110, Diskapi, Ankara, Turkey;3. Department of Plant Protection, Faculty of Agriculture, Mustafa Kemal University, 31030, Hatay, Turkey;1. Agricultural Genetics Institute, VAAS, National Key Laboratory for Plant Cell Biotechnology, LMI RICE-2, Hanoi, Viet Nam;2. University of Science and Technology of Hanoi, Hanoi, Viet Nam;3. PHIM Plant Health Institute, Univ Montpellier, INRAE, CIRAD, Institut Agro, IRD, Montpellier, France;4. CIRAD, UMR PHIM, 34090 Montpellier, France;5. Vietnam National University of Agriculture, Faculty of Biotechnology, Faculty of Agronomy, Hanoi, Viet Nam |
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| Abstract: | Horseshoe crabs are marine arthropods that are amongst the oldest living creatures that still exist today. Among the four extant species of horseshoe crabs, Carcinoscorpius rotundicauda differs from the other species by having poisonous eggs and lays its eggs in sandy-mud areas near river mouths. With the rapid development of coastal areas worldwide, C. rotundicauda habitats are decreasing. Until now, however, there has not been any study on the species' genetic variation. Simple sequence repeat (SSR) and inter-simple sequence repeat (ISSR) markers were employed to study the genetic variation in five C. rotundicauda populations from the east and west coasts of the Malay Peninsula. Both markers showed differing levels of genetic variation, but concurred on the pattern of genetic structuring among populations of the species. This includes showing that little, although significant, genetic differentiation is present among populations, suggesting a low rate of gene flow among populations. The results also suggested that C. rotundicauda may be subjected to the land barrier effect of the Malay Peninsula, whereby gene flow is limited between populations occurring on both sides of the peninsula, increasing their genetic differentiation through time. |
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| Keywords: | Population structure Dispersal Peninsular Malaysia Land barrier Sympatric species |
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