Abstract
Demand for pangolin scales in East Asia has increased dramatically in the past two decades, raising concern to the pangolin survival and bringing them to the brink of local extinction. Enumerating the number of individuals from the seized pangolin scales primarily goes undocumented, mostly due to the unavailability of the appropriate methods. In this study, we developed a Pangolin Indexing System, a multi-locus STR panel of eight dinucleotide microsatellites that showed promising results in individualization and assignment of scales into Chinese and Indian pangolins. The combined power of exclusion was 0.83 and 0.99 for Chinese and Indian pangolin. The select panel of eight polymorphic STRs exhibited the cumulative probability of identity 3.7 × 10−9 for Indian pangolin and 3.6 × 10−7 for Chinese pangolin and identified 51 unique genotypes from the 74 scales selected from the four pangolin seizures. The study demonstrated the first report of cross-species validation of STRs developed from Malayan pangolin to Indian pangolin and showed the potential application of Pangolin Indexing System in screening of large seizures through DNA profiling from the scales of Indian and Chinese pangolin.
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Acknowledgments
The authors thank the law enforcement agencies for providing scales for forensic examination and identification.
Funding
The study was conducted with the funding support from the National Mission for Himalayan Studies, Ministry of Environment, Forest and Climate Change (MoEF&CC) (Grant No. NMHS/2017-18/LG09/02/476).
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Conceptualization, MT; data curation, AS, PP, GJ, SKS, and BDJ; formal analysis, AS, GJ, and MT; funding acquisition, LKS, MT and KC; investigation, MT and LKS; methodology, AS, PP, GJ, SKS, and BDJ; project administration, MT and LKS; resources, MT, CV, KC, and LKS; software, AS, PP, GJ, SKS, BDJ, and MT; supervision, validation, and visualization, MT; roles/writing (original draft), AS, PP, and MT; and writing (review and editing), SKS and MT.
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Singh, A., Priyambada, P., Jabin, G. et al. Pangolin Indexing System: implications in forensic surveillance of large seizures. Int J Legal Med 134, 1613–1618 (2020). https://doi.org/10.1007/s00414-020-02362-5
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DOI: https://doi.org/10.1007/s00414-020-02362-5