- Journal Article2014Tracing the geographic origin of traded leopardbody parts in the Indian subcontinent withDNA-based assignment testsConservation Biology, 2014, DOI: 10.1111/cobi.12393Download
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Illicit trade in wildlife products is rapidly decimating many species across the globe. Such trade is often underestimated for wide-ranging species until it is too late for the survival of their remaining populations. Policing this trade could be vastly improved if one could reliably determine geographic origins of illegal wildlife products and identify areas where greater enforcement is needed. Using DNA-based assignment tests (i.e., samples are assigned to geographic locations), we addressed these factors for leopards (Panthera pardus) on the Indian subcontinent. We created geography-specific allele frequencies from a genetic reference database of 173 leopards across India to infer geographic origins of DNA samples from 40 seized leopard skins. Sensitivity analyses of samples of known geographic origins and assignments of seized skins demonstrated robust assignments for Indian leopards. We found that confiscated pelts seized in small numbers were not necessarily from local leopards. The geographic footprint of large seizures appeared to be bigger than the cumulative footprint of several smaller seizures, indicating widespread leopard poaching across the subcontinent. Our seized samples had male-biased sex ratios, especially the large seizures. From multiple seized sample assignments, we identified central India as a poaching hotspot for leopards. The techniques we applied can be used to identify origins of seized illegal wildlife products and trade routes at the subcontinent scale and beyond.
- Journal Article2014Tiger poaching and trafficking in India: estimating rates of occurrence and detection over four decadesBiological Conservation, doi: 10.1016/j.biocon.2014.08.016
Poaching, prey depletion and habitat destruction have decimated the world’s wild tiger population to fewer than 3200–4000. Despite focused efforts, poaching continues to be the key threat to tiger populations in India, home to more than half of the world’s tigers. A rise in the number of incidences of tiger poaching and trafficking may not essentially represent an increase in the actual occurrence of tiger poaching and trafficking, but can instead be an indication of better enforcement. With ad hoc detection rates, it becomes difficult to estimate the true quantum of poaching and the efficiency of enforcement. We empirically estimate the probability of occurrence of tiger crime and that of detecting it during periods of 3–7 years in the past 40 years in the 605 districts of India. We test the hypotheses that tiger crime is influenced by the presence of tiger trade hubs, proximity to a number of tiger habitats, and that tiger poachers prefer to use rail routes over road highways. The annual probability of detecting tiger crime was estimated to be highest (0.46, 95% CI = 0.38–0.54) in the period between 1993 and 1995. Our results identify 73 districts as current tiger crime hotspots with high (>0.5) probability of occurrence of tiger crime. We propose that the probability of occurrence of tiger crime can be a more reliable estimator of changing poaching pressures and that probability of detecting tiger crime provides a robust estimate of the efficiency in tackling tiger poaching and trafficking.
- Popular Article2014Fancy sea fanThe Hindu in School, 24 December
- Poster2014Malabar TrogonDownload
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Dense Understorey, Omnivorous, Tamil
- Popular Article2014பச்சைநிறமே,மரகதப்பச்சைநிறமே! (On Stream Glory Damselfly and streams of Western Ghats).தி இந்து நாளிதழ். The Hindu Tamil News Daily. 15th July 2014.
Jeganathan, P. (2014).பச்சைநிறமே, மரகதப்பச்சைநிறமே! - திஇந்துநாளிதழ்உயிர்மூச்சுஇணைப்பில், ‘இயற்கையின்வாசலில்’தொடர்எண் – 2. 15th July 2014. Pachai Nirame, Maragatha Pachai Nirame! – Iyarkayin Vaasalil ArticleSeries No.2 (On Stream Glory Damselfly and streams of Western Ghats). The Hindu Tamil News Daily. 15th July 2014. (The Hindu link here and personal blog link here).
- Popular Article2014வானில்200நாட்கள்பறந்தஅம்புகள்! (On Alpine Swift migration and Geolocators)தி இந்து நாளிதழ். The Hindu Tamil News Daily. 8th July 2014
Jeganathan, P. (2014). வானில் 200 நாட்கள்பறந்தஅம்புகள்! - திஇந்துநாளிதழ்உயிர்மூச்சுஇணைப்பில், ‘இயற்கையின்வாசலில்’தொடர்எண் – 1. 18th July 2014. Vaanil 200 Naatkal Parantha Ambugal! – Iyarkayin Vaasalil ArticleSeries No.1 (On Alpine Swift migration and Geolocators). The Hindu Tamil News Daily. 8th July 2014.
- Popular Article2014How corals lose their colourThe Hindu in School, 5 November
- Poster2014Malabar Whistling ThrushDownload
PDF, 1.69 MB
The Whistling Schoolboy, Moist Forests, Plantations, Dark Plumage, Tamil
- Popular Article2014விசிறிவாலியின் நடன தரிசனம். (On Yellow-bellied Fantail and other fantails of India)தி இந்து நாளிதழ். The Hindu Tamil News Daily. 19th August 2014.
Jeganathan, P. (2014). விசிறி வாலியின் நடன தரிசனம் - தி இந்து நாளிதழ் உயிர்மூச்சு இணைப்பில், ‘இயற்கையின்வாசலில்’தொடர்எண் – 7. 19th August 2014. Visirivaliyin Nadana Darisanam– Iyarkayin Vaasalil ArticleSeries No.7 (On Yellow-bellied Fantail and other fantails of India). The Hindu Tamil News Daily. 19th August 2014.
- Popular Article2014The khirava's caveThe Hindu in School, 30 July
- Popular Article2014From hunters to protectorsThe Hindu in School, 23 July
- Popular Article2014Meat momos for everyone!The Hindu in School, 13 August
- Popular Article2014பஷீரின் குடுமிக் கழுகு. (On watching Legge’s Hawk Eagle Nest)தி இந்து நாளிதழ். The Hindu Tamil News Daily. 5th August 2014.
Jeganathan, P. (2014).பஷீரின் குடுமிக் கழுகு - தி இந்து நாளிதழ் உயிர்மூச்சு இணைப்பில், ‘இயற்கையின் வாசலில்’ தொடர்எண் – 5. 5th August 2014. Basheerin Kudumik Kazugu– Iyarkayin Vaasalil ArticleSeries No.5 (On watching Legge’s Hawk Eagle Nest). The Hindu Tamil News Daily. 5th August 2014.
- Popular Article2014Nitya in the rainforestThe Hindu in School, 16 July
- Poster2014Shola GrasslandsDownload
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Shola, Mosses, Epiphytes, Wild Balsams, Kurinji, Rhodendron, Orchids, Nilgiri Tahr, Nilgiri Pipit, White-bellied Shortwing, Tamil
- Report2014Hornbill Nest Adoption Programme- 2014 breeding season
- Poster2014சிறுத்தையும் நாமும்Poster produced in collaboration with Anamalai Tiger Conservation Foundation, Wildlife Conservation Society and Mumbaikars for SGNPDownload
PDF, 9.95 MB
சிறுத்தை-மனிதன் எதிர்கொள்ளலைப் பற்றிய விளக்கச் சுவரிதழ்
- Report2014Density of Rufous-necked hornbills and their food plants in Eaglenest Wildlife SanctuaryReport to Arunachal Pradesh Forest Departmemt
- Book Chapter2014Fostering human-elephant coexistence in the Valparai landscape,Anamalai Tiger Reserve, Tamil NaduPages 14 - 26, in Human-Wildlife Conflict in the Mountains of SAARC Region - Compilation of Successful Management Strategies and Practices. SAARC Forestry Centre, Thimpu, Bhutan.
- Popular Article2014Ants in my plants!The Hindu in School, 24 June