Rapid camera-trap assessment of mammals in Tripura, India: new records and implications for conservation

Authors

  • Omkar Patil Vivek PARC Foundation 208, 2nd Floor, Shilpin Centre, 40, GD Ambekar Marg, Dadar East, Wadala, Mumbai, Maharashtra 400031, India. https://orcid.org/0009-0002-4534-4440
  • Ashutosh Joshi Vivek PARC Foundation 208, 2nd Floor, Shilpin Centre, 40, GD Ambekar Marg, Dadar East, Wadala, Mumbai, Maharashtra 400031, India.
  • Rutuja Digaskar Vivek PARC Foundation 208, 2nd Floor, Shilpin Centre, 40, GD Ambekar Marg, Dadar East, Wadala, Mumbai, Maharashtra 400031, India. https://orcid.org/0000-0003-1045-704X
  • Amey Parkar Vivek PARC Foundation 208, 2nd Floor, Shilpin Centre, 40, GD Ambekar Marg, Dadar East, Wadala, Mumbai, Maharashtra 400031, India. https://orcid.org/0009-0009-7955-7488

DOI:

https://doi.org/10.11609/jott.10251.18.5.28750-28769

Keywords:

Indo-Burma biodiversity hotspot, camera-trapping, species diversity, faunal inventory, small carnivores, primate assemblage, wetland ecosystem, habitat connectivity, photographic evidance, biodiversity monitoring, landscape fragmentation

Abstract

This study presents first ever rapid camera-trapping assessment of mammals across protected areas of Tripura, northeastern India, located within the Indo-Burma biodiversity hotspot. Surveys were conducted between January and April 2024 in Sepahijala Wildlife Sanctuary, Clouded Leopard National Park, Trishna Wildlife Sanctuary, Bison National Park, and Gumti Wildlife Sanctuary, resulting in 469 trap nights. A total of 19 mammalian species belonging to 16 genera, 10 families, and four orders were documented. Trishna Wildlife Sanctuary recorded the highest species diversity, followed by Sepahijala and Gumti. This study features the first photographic evidence of the Ferret Badger, range extensions for the Malayan Porcupine and the Fishing Cat. These findings fill important distribution gaps and highlight the conservation significance of Tripura’s fragmented forests and wetland mosaics. Despite their small size and increasing anthropogenic pressures, the protected areas of Tripura support a diverse mammalian assemblage. The study demonstrates the value of rapid, pragmatic field approaches for generating essential ecological information under resource constraints and underscores the need for continued monitoring and regional connectivity planning.

References

Bhatt, U., B.S. Adhikari & S. Lyngdoh (2022). Monitoring diversity and abundance of mammals with camera-traps: a case study of Manas National Park, Assam, India. Check List 18(5): 1023–1043. https://doi.org/10.15560/18.5.1023

Burton, A.C., E. Neilson, D. Moreira, A. Ladle, R. Steenweg, J.T. Fisher, E. Bayne & S. Boutin (2015). Wildlife camera trapping: a review and recommendations for linking surveys to ecological processes. Journal of Applied Ecology 52(3): 675–685. https://doi.org/10.1111/1365-2664.12432

Champion, H.G. & S.K. Seth (1968). A Revised Survey of the Forest Types of India. Government of India Press, New Delhi, 404 pp.

Chao, A. & L. Jost (2012). Coverage-based rarefaction and extrapolation: standardizing samples by completeness rather than size. Ecology 93(12): 2533–2547. https://doi.org/10.1890/11-1952.1

Chatterjee, S. (2008). Biodiversity conservation issues of Northeast India. International Forestry Review 10(2): 315–324. https://doi.org/10.1505/ifor.10.2.315

Chao, A., C.H. Chiu & L. Jost (2014). Unifying species diversity, phylogenetic diversity, functional diversity, and related similarity and differentiation measures through Hill numbers. Annual Review of Ecology, Evolution, and Systematics 45: 297–324. https://doi.org/10.1146/annurev-ecolsys-120213-091540

Datta, A., R. Naniwadekar & M.O. Anand (2008). Occurrence and conservation status of small carnivores in the eastern Himalaya and northeast India. Small Carnivore Conservation 39: 1–10.

Dasgupta, S., K. Sankar & A.K. Gupta (2008). Density, group size and sex ratios of Gaur Bos gaurus H. Smith in a sub-tropical semi-evergreen forest of northeast India. Indian Forester 134(10): 1281–1288.

Deb, D.B. (1981). The Flora of Tripura State, Vol. I & II. Today and Tomorrow’s Printers and Publishers, New Delhi, 509 pp.

Debnath, S., M. Dey & A. Das (2021). Climatic variability and its impact on forest ecosystems in Tripura, Northeast India. Indian Journal of Environmental Protection 41(3): 215–222.

Duckworth, J.W., K. Sankar, A.C. Williams, N.S. Kumar & R.J. Timmins (2016). Bos gaurus. The IUCN Red List of Threatened Species 2016: e.T2891A46363646. https://doi.org/10.2305/IUCN.UK.2016-2.RLTS.T2891A46363646.en. Accessed on 08.xi.2025.

Efford, M.G. & R.M. Fewster (2012). Estimating population size by spatially explicit capture-recapture. Oikos 122(6): 918–928. https://doi.org/10.1111/j.1600-0706.2012.20440.x

Gotelli, N.J. & R.K. Colwell (2001). Quantifying biodiversity: procedures and pitfalls in the measurement and comparison of species richness. Ecology Letters 4(4): 379–391. https://doi.org/10.1046/j.1461-0248.2001.00230.x

Gupta, A.K. (1998). Status and management of wildlife in Tripura. Indian Forester 124(10): 787–793.

Gupta, A.K., N. Sharma, S. Dasgupta, D. Chakraborty & R. Hazarika (2005). Conservation of Hoolock Gibbon Bunopithecus hoolock in Northeast India. Wildlife Institute of India and United States Fish and Wildlife Service, Dehradun, India, 52 pp.

Hill, M.O. (1973). Diversity and evenness: a unifying notation and its consequences. Ecology 54(2): 427–432. https://doi.org/10.2307/1934352

He, F. & X.S. Hu (2005). Hubbell’s fundamental biodiversity parameter and the Simpson’s index. Ecology Letters 8: 386–390. https://doi.org/10.1111/j.1461-0248.2005.00729.x

Jhala, Y.V., Q. Qureshi, N. Gopal, R. Yadav & P. Nigam (eds.) (2020). Status of Leopards, Co-predators and Megaherbivores in India 2018. National Tiger Conservation Authority & Wildlife Institute of India, Dehradun, 70 pp.

Johnson, A., C. Vongkhamheng & T. Saithongdam (2009). The diversity, status and conservation of small carnivores in a montane tropical forest in northern Laos. Oryx 43(4): 626–633. https://doi.org/10.1017/S0030605309990238

Jost, L. (2006). Entropy and diversity. Oikos 113(2): 363–375. https://doi.org/10.1111/j.2006.0030-1299.14714.x

Kays, R., B.S. Arbogast, M. Baker-Whatton, C. Beirne, H.M. Boone, M. Bowler, S.F. Burneo, M.V. Cove, P. Ding, S. Espinosa, A.L.S. Gonçalves, C.P. Hansen, P.A. Jansen, J.M. Kolowski, T.W. Knowles, M.G.M.L.G.M. Lima, J. Millspaugh, W.J. McShea, K. Pacifici, A.W. Parsons, B.S. Pease, F. Rovero, F. Santos, S.G. Schuttler, D. Sheil, X. Si, M. Snider & W.R. Spironello (2020). An empirical evaluation of camera trap study design: how many, how long and when? Methods in Ecology and Evolution 11(6): 700–713. https://doi.org/10.1111/2041-210X.13370

Lyngdoh A.W., H.N. Kumara, S. Babu & P.V. Karunakaran (2023). Community Reserves: their significance for the conservation of mammals in a mosaic of community-managed lands in Meghalaya, northeast India. PLoS ONE 18(1): e0280994. https://doi.org/10.1371/journal.pone.0280994

Magurran, A.E. (2004). Measuring Biological Diversity. Blackwell Publishing, Oxford, 256 pp.

Majumder, J., K. Majumdar, P.P. Bhattacharjee & B.K. Agarwala (2015). Inventory of mammals in protected reserves and natural habitats of Tripura, northeast India with notes on existing threats and new records of Large Footed Mouse-eared Bat and Greater False Vampire Bat. Check List 11(2): 1–11. https://doi.org/10.15560/11.2.1611

Majumdar, K. & B.K. Datta (2018). Forest type classification of Tripura, northeast India: an overview on historical aspects and present ecological approaches, pp. 273–289. In: Arrawatia, M.L. & S. Tamang (eds.). Plant Diversity in the Himalaya Hotspot Region, Vol. II. Bishen Singh Mahendra Pal Singh, Dehradun.

Mishra, C., J.C. Young, M. Fiechter, B. Rutherford & S.M. Redpath (2017). Building partnerships with communities for biodiversity conservation: lessons from Asian mountains. Journal of Applied Ecology 54(6): 1583–1591. https://doi.org/10.1111/1365-2664.12918

Myers, N., R.A. Mittermeier, C.G. Mittermeier, G.A.B. da Fonseca & J. Kent (2000). Biodiversity hotspots for conservation priorities. Nature 403: 853–858. https://doi.org/10.1038/35002501

O’Brien, T.G. (2011). Abundance, density and relative abundance: a conceptual framework, pp. 71–96. In: O’Connell, A.F., J.D. Nichols & K.U. Karanth (eds.). Camera Traps in Animal Ecology: Methods and Analyses. Springer, Tokyo, 271 pp. https://doi.org/10.1007/978-4-431-99495-4_6

Oksanen, J., F.G. Blanchet, M. Friendly, R. Kindt, P. Legendre, D. McGlinn & M.H.H. Stevens (2022). Vegan: Community Ecology Package. R package version 2: 6–4. https://CRAN.R-project.org/package=vegan

Palencia, P., J. Vicente, C. Soriguer & P. Acevedo (2022). Towards a best-practices guide for camera trapping: assessing differences among camera trap models and settings under field conditions. Journal of Zoology 316(3): 197–2018. https://doi.org/10.1111/jzo.12945

Patil, O., A. Joshi & A. Parkar (2025a). First photographic record of Ferret Badger sp. Saint-Hilaire, 1831 (Mammalia: Carnivora: Mustelidae) from the state of Tripura, India. Journal of Threatened Taxa 17(4): 26857–26863. https://doi.org/10.11609/jott.9456.17.4.26857-26863

Patil, O., S. Pavagada, A. Joshi, & A. Parkar (2025b). First camera trap record of a fishing cat in Tripura, India. CATnews 84: 12–15.

Rajaratnam, R., M. Sunquist, L. Rajaratnam & L. Ambu (2007). Diet and habitat selection of the Leopard Cat Prionailurus bengalensis borneoensis in an agricultural landscape in Sabah, Malaysian Borneo. Journal of Tropical Ecology 23(2): 209–217. https://doi.org/10.1017/S0266467406003841

Rovero, F. & A.R. Marshall (2009). Camera trapping photographic rate as an index of density in forest ungulates. Journal of Applied Ecology 46(5): 1011–1017. https://doi.org/10.1111/j.1365-2664.2009.01705.x

Rovero, F. & F. Zimmermann (2016). Camera Trapping for Wildlife Research. Pelagic Publishing, Exeter, UK, 320 pp.

Sethy, J., S.N. Chauhan & K.M. Murthy (2021). Estimating mammalian abundance and occupancy in tropical forest Indian Himalaya, Dampa Tiger Reserve, Mizoram, India. Environmental Analysis and Ecological Studies. 8(5): 945–957. https://doi.org/10.31031/eaes.2021.08.000696

Spellerberg, I.F. & P.J. Fedor (2003). A tribute to Claude Shannon (1916–2001) and a plea for more rigorous use of species richness, species diversity and the ‘Shannon-Weiner’ Index. Global Ecology and Biogeography 12: 177–179. https://doi.org/10.1046/j.1466-822X.2003.00015.x

Sutherland, W.J., A.S. Pullin, P.M. Dolman & T.M. Knight (2004). The need for evidence-based conservation. Trends in Ecology & Evolution 19(6): 305–308. https://doi.org/10.1016/j.tree.2004.03.018

Talukdar, N.R., P. Choudhary, R.A. Barbhuiya, F. Ahmed, D. Daolagupu & J.B. Baishya (2021). Mammals of northeastern India: an updated checklist. Journal of Threatened Taxa (13)4: 18059-18098. https://doi.org/10.11609/jott.6010.13.4.18059-18098

Wearn, O.R. & P. Glover-Kapfer (2017). Camera-trapping for conservation: a guide to best practices. WWF Conservation Technology Series 1(1), WWF-UK, Woking, United Kingdom.

Woodruff, D.S. (2010). Biogeography and conservation in southeast Asia: how 2.7 million years of repeated environmental fluctuations affect today’s patterns and the future of the remaining refugial-phase biodiversity. Biodiversity Conservation 19: 919–941. https://doi.org/10.1007/s10531-010-9783-3

Downloads

Published

26-05-2026

Issue

Section

Articles