- Popular Article2012சின்னஞ்சிறுகுருவே…(On Ants)புதிய தலைமுறை. 26ஜூலை 2012. Puthiya Thalaimurai. 26th July 2012.
- Popular Article2012தட்டான் பார்க்கலாம் வாங்க (Lets watch Odonates)துளிர். ஜனவரி 2012. பக்கம் 16-18 / Thulir. Science monthly magazine for Kids. January Pp 7-10
தட்டான்பார்க்கலாம்வாங்க.துளிர். ஜனவரி 2012. பக்கம் 16-18. [Jeganathan, P. (2012).Thattan Pakkalam Vanga.Thulir. Science monthly magazine for Kids. January Pp 7-10(Lets watch Odonates)]
- Journal Article2012Impact of vehicular traffic on large mammal use of highway-edges in southern IndiaCurrent Science 102(7): 1047-1051Download
PDF, 166 KB
India’s phenomenal economic growth over the last decade has been accompanied by a much-needed expansion and improvement in transport and other infrastructure networks. While there are legally mandated assessments of the potential ecological impacts of such infrastructure projects prior to implementation, rarely are there post-implementation assessments of their real ecological impacts. In this communication, we present results of a preliminary study examining the impact of vehicular traffic on the usage of road edges by large mammals along a highway passing through Nagarahole Tiger Reserve, southern India. We estimated large mammal encounter rates at remotely triggered camera traps on two consecutive sections of the same highway – one closed to vehicular traffic and the other open to vehicles only during daytime. We observed lower encounter rates of chital, gaur and elephants at camera traps in the highway segment with higher vehicular traffic density, suggesting that these species avoided busy highways. Based on our findings, we emphasize the importance of continued ecological impact assessments of development projects to identify and mitigate unforeseen impacts. Further, an approach to development planning that integrates conservation concerns, especially where development projects coincide with ecologically critical areas, is urgently needed in India.
- Journal Article2012Optimizing individual identification and survey effort for photographic capture–recapture sampling of species with temporally variable morphological traitsAnimal Conservation 15(2): 174-183
Endangered, wide-ranging megafauna have many threats to contend with during their struggle for survival in an ever-increasing human dominance of the environment. Reliable monitoring of endangered large mammal populations is therefore a critical conservation requirement. Photographic capture–recapture (CR) techniques have opened up avenues for population monitoring of individually recognizable large mammal species. The efficient application of these techniques, however, can be constrained by challenges in reliably identifying individuals arising from the use of multiple, and potentially variable traits, as well as issues of temporal sampling of populations in the field. We address these key problems by describing an automated process of rapidly identifying individual Asian elephants (Elephas maximus) from photographs, and comparing resultant CR-based population parameter estimates with those obtained using supervised visual identification of individuals. In addition, we assess the temporal effort necessary for robust estimation of demographic parameters in our study population. Morphological traits that maintain constancy over time, including variations in tusk characteristics, and ear fold and lobe shape, proved the most reliable for individual identification and subsequent estimation of population parameters. The use of temporally variable traits contributed to high probabilities of misidentification and biased estimates of population size. We found a minimum of seven sampling occasions necessary for reliable population estimation. Our study contributes to design issues for CR studies by providing insights into optimality of sampling effort such that precision of parameter estimates are not compromised while minimizing survey costs. We demonstrate the importance of accurate individual identification in the context of such studies and recommend the use of fixed morphological traits as the optimal individual identification strategy for species where animals are distinguished on the basis of multiple attributes, including some that may be variable over time.
- Popular Article2011Elusive Malabar civetDeccan Herald Spectrum, 25 January 2011, page 4.Download
PDF, 190 KB
Have we really lost another mammal species from India? If not, what has become of the Malabar civet? Intrigued, Divya Mudappa sets out to look for the species in the Western Ghats along with NIAS researcher Nandini, only to find the Indian civet. The Malabar civet, she says, is rare in museum collections too, and even a bad photograph of a wild Malabar civet would be better than none at all.
Available here: http://www.deccanherald.com/content/131706/elusive-malabar-civet.html
- Popular Article2011Habitat is the key.Down To Earth. October 1-15. Page 31.Download
PDF, 1.16 MB
Jeganathan, P. (2011). Habitat is the key. Down To Earth. October 1-15. Page 31.
- Popular Article2011Roads, revetments and restorationBlog post at Reviving Rainforest
- Popular Article2011Bridging the canopy gapsBlog post at Reviving Rainforest
- Popular Article2011Wild blames wildCare4NatureDownload
PDF, 2.66 MB
Impact of dog on red fox
- Journal Article2011Farmland foods: Black-necked Stork Ephippiorhynchus asiaticus prey items in an agricultural landscapeForktail 27: 98-100
- Poster2011Some Birds Of The Nilgirissupported by Whitley Fund For NatureDownload
PDF, 22.7 MB
Nilgiri Biosphere Reserve, Emerald Dove, Hill Myna, Indian Pitta, Jerdon's Nightjar, The Great Hornbill, Grey Wagtail, Black Eagle, Stork-billed Kingfisher, Blue-bearded Bee-eater, Spot-bellied Eagle Owl, Malabar Trogon
- Poster2011Vultures in Perilsupported by Whitley Fund For NatureDownload
PDF, 17.9 MB
Long-billed Vultures, Red-headed Vulture, Egyptian Vulture, Diclofenac, Visceral Gout
- Popular Article2011இளைய தலைமுறைக்கு மழைக்காட்டைப்பற்றிய தகவல்கள்http://hindi.mongabay.com/tamil/kids/
Rhett Butler (2006). Rain forest information for school kids. http://kids.mongabay.com/ In Tamil: by P. Jeganathan (2011). Ilaya thalaimuraiku Mazaikattai patriya Thagavalgal.
- Report2011Linking rural energy and nature conservation in a tribal village in Arunachal PradeshFinal Report submitted to DST, New Delhi, May 2011, 22 pp.
- Popular Article2011Conserving the tiger needs putting people firstTimes of India, 4 March 2011
- Popular Article2011Through democracy or by diktat? Creating inviolate areas for wildlife conservationThe Hindu Survey of the Environment 2011
- Journal Article2011Less than wild? Commensal primates and wildlife conservationJournal of Biosciences 36: 749-753
- Popular Article2011A real race on an imaginary course?Down To Earth, 15 October 2011
- Popular Article2011Staying legal, staying reasonableDown To Earth, 15 November 2011
Full article accessible here
- Popular Article2011One Earth,One Chance: Conserving a Connected WorldThe Hindu Magazine 5 June 2011, page 1 and 4.
World Environment Day on Sunday is an occasion to assess where we stand in making this planet a more liveable place for us and future generations. Wildlife scientists and conservation experts on the choices we can make today before it becomes too late... A consumer picking a product off a shelf has an immediate impact on distant species and natural ecosystems. And that link brings with it both an environmental peril and opportunity.