- Journal Article2013Role of Tibetan Buddhist Monasteries in Snow Leopard ConservationConservation Biology. DOI: 10.1111/cobi.12135
- Popular Article2013All in a nameThe Hindu in School, 16 October
- Popular Article2013Not so deserted, after all!The Hindu in School, 6 November
- Popular Article2013Living in an extreme worldThe Hindu, Editorial Page, 13 July 2013, page 10.
There is compelling evidence to show that man weather-related disasters are not chance occurrences but are a result of human activities that have altered our atmosphere.
- Popular Article2013An apology to the Iyerpadi gentlemanThe Hindu Magazine, 14 April 2013, page 4.
- Popular Article2013A morning with ‘Bloated Stomach’The Hindu in School, 8 May
- Journal Article2013Antelope mating strategies facilitate invasion of grasslands by a woody weed.Oikos. 122(10): 1441-1452.Download
PDF, 357 KB
Intra and interspecific variation in frugivore behaviour can have important consequences for seed dispersal outcomes. However, most information comes from among-species comparisons, and within-species variation is relatively poorly understood. We examined how large intraspecific differences in the behaviour of a native disperser, blackbuck antelope Antilope cervicapra, influence dispersal of a woody invasive, Prosopis juliflora, in a grassland ecosystem. Blackbuck disperse P. juliflora seeds through their dung. In lekking blackbuck populations, males defend clustered or dispersed mating territories. Territorial male movement is restricted, and within their territories males defecate on dung-piles. In contrast, mixed-sex herds range over large areas and do not create dung-piles. We expected territorial males to shape seed dispersal patterns, and seed deposition and seedling recruitment to be spatially localized. Territorial males had a disproportionately large influence on seed dispersal. Adult males removed twice as much fruit as females, and seed arrival was disproportionately high on territories. Also, because lek-territories are clustered, seed arrival was spatially highly concentrated. Seedling recruitment was also substantially higher on territories compared with random sites, indicating that the local concentration of seeds created by territorial males continued into high local recruitment of seedlings. Territorial male behaviour may, thus, result in a distinct spatial pattern of invasion of grasslands by the woody P. juliflora. An ex situ experiment showed no beneficial effect of dung and a negative effect of light on seed germination. We conclude that large intraspecific behavioural differences within frugivore populations can result in significant variation in their effectiveness as seed dispersers. Mating strategies in a disperser could shape seed dispersal, seedling recruitment and potentially plant distribution patterns. These mating strategies may aid in the spread of invasives, such as P. juliflora, which could, in turn, negatively influence the behaviour and ecology of native dispersers.
- Popular Article2013THE resurrectionThe Hindu in School, 23 October
- Popular Article2013Rasgullas worth their tinThe Hindu in School, 13 March
- Journal Article2013First record of Tristram's Bunting Emberiza tristrami from IndiaIndian Birds 8:134-135
- Journal Article2013Joint Indian initiative creates tiger corridorNature, 500, 29Download
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Short excerpt on the creation of 6,500 sq km of contiguous network of protected areas — the largest in the country.
- Popular Article2013Becoming one of themThe Hindu in School, 9 January
- Popular Article2013Waiting for the orioleThe Hindu in School, 24 April
- Popular Article2013Securing Habitat of NemoFriday, April 12, Andaman Chronicles.
- Journal Article2013Spatial and temporal variation in hornbill densities in Namdapha Tiger Reserve, Arunachal Pradesh, north-east IndiaTropical Conservation Science 6:734-748Download
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Asian hornbill populations are declining across their ranges because of hunting and deforestation. Five of the 32 Asian hornbill species occur in north-east India. However, vital information on their abundance from the region remains scanty. Understanding spatiotemporal variation in densities provides crucial information for formulating effective conservation strategies based on species-specific abundance patterns and population trends. We examined spatiotemporal variation in densities of four hornbill species in the Namdapha Tiger Reserve, a site identified as an important site for hornbill conservation in Asia. We collected data through variable-width line transect sampling (effort=842.1 km) in the non-breeding season from 2009-12 to estimate hornbill densities. We had 458 detections of four hornbill species. We have estimated White-throated Brown Hornbill densities (7.9 birds/km2) for the first time throughout its entire range. The mean Rufous-necked Hornbill densities (6.9 birds/km2) were higher than those reported elsewhere. Great (3.9 birds/km2) and Wreathed Hornbill (16.1 birds/km2) densities were comparable with other sites. The peak densities of all hornbill species in November-December are among the highest reported from Asia. Wreathed Hornbill densities showed temporal variation peaking in November-December (68 birds/km2) and drastically declining by March-April (1.3 birds/km2), indicating seasonal altitudinal movement to low elevation areas outside the reserve during the breeding season. Our results underscored the spatial variation in hornbill distribution, with low densities of Great and the White-throated Brown hornbills in higher elevations. Our study demonstrates the global importance of Namdapha for hornbills, given its large area and high densities of four hornbill species.
- Popular Article2013ஊசிவால் குளவிகள். (On Ichneumon wasps)தி ஹிந்து தீபாவளி மலர் The Hindu Tamil, Deepavali Malar (Deepavali Special Issue)
- Poster2013Poster designed to carry out awareness programs regarding human-leopard conflictMarch 2013Download
JPG, 1.17 MB
Leopard outreach activities are carried out based on the locations identified through conflict monitoring activity. This poster specifically designed to address conflict issues is distributed to communities to minimize anxiety and help in conflict reduction.
- Popular Article2013Jalebis at the forest fenceThe Hindu in School, 6 March
- Journal Article2013People, predators and perceptions: patterns of livestock depredation by snow leopards and wolves.Journal of Applied Ecology 50 (3), 550-560
- Book Chapter2013Goral Nemorhaedus goralMammals of South Asia (eds A. J. T. Johnsingh & N.Manjrekar).Universities Press, Hyderabad.