Emerging patterns of genetic diversity in the Critically Endangered Malayan tiger (Panthera tigris jacksoni)

Kate Allberry, Jeffrine Japning Rovie-Ryan, Nur Alizati Nabila Binti Giarat Ali, Nurul-Ain Elias, Mark Rayan Darmaraj, Christopher Chai Thiam Wong, Lau Ching Fong, Olutolani Smith, Khairul Amirin Bin Mohamed, Mohamad Izereen Bin Amat Mukri, Muhammad Hafiz Bin Mohd Yazid, Matthew J. Struebig, Rob Ogden, Jim Groombridge*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Southeast Asia experiences some of the highest deforestation in the world. Loss of tropical forest typically leads to widespread habitat fragmentation, with detrimental effects on dispersal ability and gene flow—particularly for large carnivores. We conducted mtDNA and microsatellite analysis to assess—for the first time—contemporary patterns of genetic diversity in the Malayan tiger. We collected 295 suspected carnivore samples in Peninsular Malaysia, from which we identified 26 as originating from tiger using 16 polymorphic microsatellite loci, comprising 22 individual tigers. Despite limitations of the study, our findings suggest tiger subpopulations in the north of the peninsula maintain some genetic connectivity and migration between two putative geographic subpopulations in the Main Range and Greater Taman Negara, with negligible population segregation due to dispersal barriers such as road infrastructure. We identified consistently lower levels of genetic diversity in tigers in the Greater Taman Negara region compared to tigers in the Main Range and small but emerging differences in nuclear and mitochondrial genetic diversity. Our mtDNA haplotype and nuclear DNA analyses suggest the levels of genetic diversity in Malayan tigers may be amongst some of the lowest of the surviving tiger subspecies, though the study is limited both in scale and genomic loci. Our findings are consistent with an expected lag between the rapid decline of tigers in Peninsular Malaysia by over 95% in the last 70 years and observed differences in their levels of genetic diversity.

Original languageEnglish
Pages (from-to)1325-1349
Number of pages25
JournalBiodiversity and Conservation
Volume33
Issue number4
Early online date11 Mar 2024
DOIs
Publication statusE-pub ahead of print - 11 Mar 2024

Keywords / Materials (for Non-textual outputs)

  • conservation genetics
  • habitat fragmentation
  • endangered species
  • Southeast Asia
  • genetic diversity
  • tiger
  • Malaysia

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