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International Journal of Zoology
Volume 2017, Article ID 5431041, 6 pages
Research Article

Relationships among Tomistoma schlegelii in Malaysia Based on Cyt b-Control Region Gene Analysis

Department of Aquatic Science, Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia

Correspondence should be addressed to Muhammad Amirul Arib Md Adzhar; moc.liamg@29biralurima

Received 16 February 2017; Revised 4 May 2017; Accepted 19 October 2017; Published 15 November 2017

Academic Editor: Hynek Burda

Copyright © 2017 Muhammad Amirul Arib Md Adzhar and Ruhana Hassan. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Tomistoma schlegelii is a slender snout crocodile, secretive in nature which is currently under Appendix I of Convention on International Trade in Endangered Species of Wild Flora and Fauna (CITES). Limited information is currently available on its wild population, especially in Malaysia. Thus this study aims to describe genetic relationship of T. schlegelii populations from Malaysia which was done using partial sequencing of Cytochrome b-control region mtDNA gene. The study reveals that the genetic diversity among T. schlegelii is high, ranging from 0.16% to 3.34%, suggesting healthy populations. Analysis showed that there is gene flow among populations (Da = 1.71% to 2.21%) within Western Sarawak, Peninsular Malaysia, and other geographical regions coherent with Sundaland theory, suggesting that there is ancient river system connecting the two regions of Peninsular Malaysia and West Borneo when the Sunda Shelf was exposed. Unique haplotypes had been observed in Northern Sarawak (SAM01 and SAM02) as well as in Sumatera; thus each T. schlegelii deserved its own management strategies to ensure the survival of the species.