- Popular Article2014உண்டி கொடுத்தோம், உயிர் கொடுத்தோமா? (On ill effects of feeding monkeys).தி இந்து நாளிதழ். The Hindu Tamil News Daily. 16th September 2014.
Jeganathan, P. (2014).உண்டி கொடுத்தோம், உயிர் கொடுத்தோமா? - தி இந்து நாளிதழ் உயிர்மூச்சு இணைப்பில், ‘இயற்கையின் வாசலில்’ தொடர்எண் – 11. 16th September 2014. Undi Koduthom Uyir Koduthoma?– Iyarkayin Vaasalil ArticleSeries No.11 (On ill effects of feeding monkeys). The Hindu Tamil News Daily. 16th September 2014.
- Popular Article2014ஓர் இன்பச் சுற்றுலாவும், அதற்குப் பிறகும். (On impact of mass tourism in hill stations and irresponsible tourists)தி இந்து நாளிதழ். The Hindu Tamil News Daily. 23rd September 2014.
Jeganathan, P. (2014). ஓர் இன்பச் சுற்றுலாவும், அதற்குப் பிறகும் - தி இந்து நாளிதழ் உயிர்மூச்சு இணைப்பில், ‘இயற்கையின் வாசலில்’ தொடர்எண் – 12. 23rd September 2014. Or Inba Sutrulavum Atharku Piragum– Iyarkayin Vaasalil ArticleSeries No.12 (On impact of mass tourism in hill stations and irresponsible tourists). The Hindu Tamil News Daily. 23rd September 2014.
- Journal Article2014The PREDICTS database: a global database of how local terrestrial biodiversity responds to human impactsEcology and Evolution, Volume 4, Issue 24 Pages: 4701–4735
Biodiversity continues to decline in the face of increasing anthropogenic pressures such as habitat destruction, exploitation, pollution and introduction of alien species. Existing global databases of species’ threat status or population time series are dominated by charismatic species. The collation of datasets with broad taxonomic and biogeographic extents, and that support computation of a range of biodiversity indicators, is necessary to enable better understanding of historical declines and to project – and avert – future declines. We describe and assess a new database of more than 1.6 million samples from 78 countries representing over 28,000 species, collated from existing spatial comparisons of local-scale biodiversity exposed to different intensities and types of anthropogenic pressures, from terrestrial sites around the world.
- Popular Article2013Shooting down bharalENVIRONDownload
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Talks about exploring a remote valley in Kinnaur and a fascinating sighting of bharal or blue sheep
- Journal Article2013Complex ecological pathways underlie perceptions of conflict between green turtles and fishers in the Lakshadweep Islands.Biological Conservation 167: 25-34
Managing human–wildlife conflict is often complicated by apparent mismatches between community perceptions and measures of directly incurred losses. Fishers in Agatti Island (Lakshadweep, India) associate recent increases in green turtle (Chelonia mydas) populations with declining fish catches, resulting in targeted killing of turtles. We compared fisher perceptions in Agatti with a very similar atoll, Kadmat, with much lower turtle densities. Nearly 90% of Agatti fishers interviewed blamed turtles for declining catch compared with 20% in Kadmat and proposed two mechanisms for this decline: direct interference (e.g., turtles damaged gear) which we define as first order conflict, and indirect mechanisms (second order conflict): turtles overgrazed seagrasses, thereby reducing fish catch. We evaluated the magnitude of gear loss with interviews and tested proposed indirect mechanisms with a turtle density gradient, before–after comparisons (taking advantage of an increase in turtles in Kadmat and concurrent decrease in Agatti) and a natural herbivore exclosure. These complementary approaches supported fisher-pro- posed second-order mechanisms: at high densities, turtles heavily grazed seagrasses, significantly reduced canopy heights, lowered fish recruit abundance, food fish biomass and catch. Estimates of losses incurred in Agatti show that first-order conflict cost fishers USD 0.6 fisher-1 year1, while second-order pathways accounted for USD 887 fisher-1 year-1. Our results show that local perceptions are fueled by often-complex mechanisms that, though not always straightforward to measure, are very important in generating conflict. Reconciling the human–wildlife interface requires an adequate accounting of direct and indirect mechanisms to more completely reflect true losses communities bear for living with wildlife.
- Journal Article2013Understanding the patchy distribution of four-horned antelope Tetracerus quadricornis in a tropical dry deciduous forest in Central IndiaJournal of Tropical Ecology, 1-10. doi:10.1017/S0266467413000722
At the landscape level, the four-horned antelope is confined to tropical dry deciduous forests and within these, their distribution is patchy. Various factors have been proposed as determinants for their patchy distribution within landscapes, but none provided an adequate explanation. We hypothesized that availability of a constant supply of forage influenced the species distribution.We found that the four-horned antelope mainly fed on fruits and flowers, and that a total of 60% of the tree species in Panna Tiger Reserve bore fruits at different times of the year. High tree species richness in habitat patches was considered a surrogate for constant supply of forage for the four-horned antelope. Data from 547 sighting locations between 2002 and 2006 and six spatial layers were analysed using maximum entropy to produce a probability distribution model for the four-horned antelope in Panna Tiger Reserve. Our model predicted that habitat patches summing up to only 9.5% of the 543 km2 of Panna Tiger Reserve had high probability of distribution (>0.5) of four-horned antelope. Although all variables contributed to the distribution model of the four-horned antelope, explanatory power was highest for tree species richness within habitat patches. The distribution of four-horned antelope within tropical dry deciduous forests can be treated as an indicator of high tree diversity and hence habitat quality.
- Book Chapter2013Arunachal macaque Macaca munzala (Sinha, Datta, Madhusudan and Mishra 2005)Pages 198-210 in A. J. T. Johnsingh & N. Manjrekar (editors) Mammals of South Asia – Volume 1. Universities Press, Hyderabad, India
- Popular Article2013Fungi forayThe Hindu, Young World, 29th January 2013.
Jeganathan, P. (2013). Fungi foray. The Hindu, Young World, 29th January 2013. http://www.thehindu.com/life-and-style/kids/fungi-foray/article4353151.ece
- Book Chapter2013Goral Nemorhaedus goralMammals of South Asia (eds A. J. T. Johnsingh & N.Manjrekar).Universities Press, Hyderabad.
- Journal Article2013Design and Evaluation of a Robust Optical Beam-Interruption-Based Vehicle Classiﬁer SystemIEEE Transactions on Intelligent Transportation Systems 14(3): 1043-1052Download
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This paper presents the design and development of a novel optical vehicle classifier system, which is based on interruption of laser beams, that is suitable for use in places with poor transportation infrastructure. The system can estimate the speed, axle count, wheelbase, tire diameter, and the lane of motion of a vehicle. The design of the system eliminates the need for careful optical alignment, whereas the proposed estimation strategies render the estimates insensitive to angular mounting errors and to unevenness of the road. Strategies to estimate vehicular parameters are described along with the optimization of the geometry of the system to minimize estimation errors due to quantization. The system is subsequently fabricated, and the proposed features of the system are experimentally demonstrated. The relative errors in the estimation of velocity and tire diameter are shown to be within 0.5% and to change by less than 17% for angular mounting errors up to 30°. In the field, the classifier demonstrates accuracy better than 97.5% and 94%, respectively, in the estimation of the wheelbase and lane of motion and can classify vehicles with an average accuracy of over 89.5%.
- Popular Article2013Development minus green shootsThe Hindu, 13 February 2013
By exempting some projects on forest land from gram sabha consent, the government has undermined the rights of local communities and their crucial role in protecting the environment.
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- Journal Article2013Reversible immobilization of free-ranging snow leopards (Panthera uncia) using a combination of Medetomidine and Tiletamine-ZolazepamJournal of Wildlife Diseases DOI: 10.7589/2012-02-049
- Newsletter2013Where have all the dugongs gone? A study on long-term occupancy trends in the Andaman and Nicobar archipelago, India,Sirenews, Newsletter of the IUCN Sirenia Specialist Group, Vol. 60.
- Journal Article2013Large carnivores and low diversity of optimal prey: a comparison of the diets of snow leopards Panthera uncia and wolves Canis lupus in Sarychat-Ertash Reserve in KyrgyzstanOryx DOI:10.1017/S0030605313000306
- Journal Article2013Globalization of the Cashmere Market and the Decline of Large Mammals in Central AsiaConservation Biology 27: 679-689
- Journal Article2013Role of Tibetan Buddhist Monasteries in Snow Leopard ConservationConservation Biology. DOI: 10.1111/cobi.12135
- Popular Article2013Not so deserted, after all!The Hindu in School, 6 November
- Popular Article2013A morning with ‘Bloated Stomach’The Hindu in School, 8 May
- Report2013Hornbills, rats, seeds and rainforest trees: plant-animal interactions and plant demographyFinal Report submitted to National Geographic Society, June 2013
- Popular Article2013Glories of the StreamsThe Hindu in School, 6 February
Jeganathan, P. (2013). Glories of the Streams. The Hindu in School, 6 February