PhD Theses (WII)

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Author: search.filters.author.Sankar, K.Subject: search.filters.subject.Rajasthan

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    Ecology of striped hyena (Hyaena hyaena) in Sariska Tiger Reserve, Rajasthan
    (Wildlife Institute of India, Dehradun, 2019) Mandal, Dibyendu K.; Sankar, K.; Qureshi, Qamar
    This study was conceivedto fill gaps in our understanding of striped hyena population parameters, resource utilization and their sociality. Finally, the findings were synthesized to understand the processes shaping diverse sociality of striped hyenas across varying resources in a comparative context under the framework of RDH. The present study was undertaken in Sariska Tiger Reserve (STR), a protected area situated in the semi-arid region of North-Western India. STR is an isolated system which has a sharp boundary with human habitations.
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    Ecology of medium and small sized carnivores in Sariska Tiger Reserve, Rajasthan
    (Wildlife Institute of India, Dehradun, 2011) Gupta, Shilpi; Sankar, K.; Qureshi, Qamar
    To assess wildlife population trends, scientifically based monitoring programs must be carried out. A new generation of camera traps and the use of well developed capture-recapture models have led to an increase in the use of remote surveying and monitoring methodologies for nocturnal species. Population estimates can be done for individually identifiable cryptic nocturnal species through camera trap. The study was carried out in Sariska Tiger Reserve (STR), western Rajasthan, India, (79° 17’ to 76°34’N, 27° 5’ to 27° 33’ E) from November 2007 to June 2009. The objectives of study are (1) To estimate the abundance of medium and small sized carnivores such as striped hyena, jackal, jungle cat, civets and mongoose. (2) To study the prey availability and food habits of medium and small sized carnivores and To assess the habitat suitability for these carnivores. In this study, both capture - recapture method and Royle -Nichols (2003) approach was applied to photographic capture trap data to estimate density and abundance of nocturnal cryptic species. The results of this study presented both numerically and also in the form of habitat suitability maps for all the study species in the study area. These finding have potential to develop basis for managing areas for these medium and small sized carnivores in Sariska and other similar habitat in semi arid zone.
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    Ecology and management of savanna vegetation in Sariska Tiger Reserve, Rajasthan.
    (Wildlife Institute of India, Dehradun, 2015) Bhatt, Priyanka; Rawat, G.S.; Sankar, K.
    This study is aimed to document the role of various abiotic and biotic factors playing a vital role in the coexistence of trees and grasses. Attempts have been made to bridge the research gaps related to the structure and composition of forest vegetation, phenology diversity and regeneration patterns along the landscape. Hence, present study was initiated with a view to collect baseline data that would be helpful in monitoring the forest changes in future. It provides information about the savanna vegetation and the dynamics and also deals with the vegetation composition, species diversity, richness and other phyto- sociological parameters, Vegeation structure, composition and factors affecting the savanna vegetation in Sariska Tiger Reserve. Objectives are : 1. To study the phenology of savanna species 2. To study the aut-ecology of dominant savanna grasses and tree species of Sariska with reference to biotic and abiotic factors 3. To study the impact of invasive species and management implications: case study of Adhatoda vasica
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    Prey selection, ranging pattern and habitat utilization of the reintroduced tigers in Sariska Tiger Reserve, Rajasthan, western India.
    (Wildlife Institute of India, Dehradun, 2015) Bhattacharjee, Subhadeep; Sankar, K.; Qureshi, Qamar
    In a forest ecosystem, large felids are generally the top predators in almost every food chain influencing the structure and dynamics of the subsequent descending trophic levels. Evaluation of last fifty years’ presence and absence status of large felids in Protected Areas (PAs) of Indian subcontinent revealed that local extinction was highest in the dry deciduous habitat. Tiger, among all large felids had already become locally extinct from 70% of semi-arid dry thorn and 35% of dry deciduous forest areas. Tigers in dry semi-arid forests with its global western most limit, survive in small isolated populations. The present study assessed the movements and ranging patterns, prey availability, prey utilization and resource selection of reintroduced tigers in Sariska Tiger Reserve from July 2008 to June 2012. After the local extermination of the tiger population in Sariska Tiger Reserve (STR), during December, 2005 with the consent of the National Tiger Conservation Authority (NTCA) and the Rajasthan Forest Department a recovery plan for tigers in Sariska was prepared by the Wildlife Institute of India along with a detailed protocol for tiger reintroduction. The present study was conducted in 400 km2 area which is the notified National Park area of Sariska Tiger Reserve from July 2008 to June 2012 covering all the three seasons monsoon (July to October), winter (November to February) and summer (March to June) with the following objectives: a) to evaluate the prey availability for the reintroduced tigers, b) to assess the prey selection patterns of the reintroduced tigers, c) to study the movement and ranging patterns of the reintroduced tigers and d) to assess the habitat utilization patterns, resource selection and response of tiger to various anthropogenic pressure in the study area. In Sariska, peafowl was observed to be the most abundant prey species throughout the study period.