PhD Theses (WII)

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Author: search.filters.author.Pandav, BivashSubject: search.filters.subject.Species abundance

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Now showing 1 - 3 of 3
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    Determinants of occurrence of snow leopard and its prey species in the Indian Greater and Trans Himalaya.
    (Wildlife Institute of India, Dehradun, 2017) Ghoshal, Abhishek; Pandav, Bivash; Bhatanagar, Yash veer
    Understanding patterns of species occurrences and how their distribution and abundance are affected by abiotic and biotic factors have been a major theme of ecological research. The range and changes in the distribution of a species are important parameters to assess conservation status. Robust assessment of factors affecting species distribution and abundance contribute to the identification of conservation issues, appropriate scale(s) for species conservation and key stakeholders. This study is attempted to understand how distribution and abundance of a large-ranging and difficult-to-sample carnivore and its primary wild-prey species are affected by topographic, vegetation and land-use variables, at wide and fine spatial scales. Study is focused on the snow leopard (Panthera uncia), the elusive, rare and endangered apex predator of the Central and South Asian mountain systems, and its main prey, blue sheep or bharal (Pseudois nayaur) and Asiatic ibex (Capra sibirica) for the work. I have utilized tools from quantitative ecology and social sciences through the thesis.
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    Occupancy and abundance of tigers and their prey in Terai Arc Landscape, Nepal.
    (Wildlife Institute of India, Dehradun, 2012) Karki, Jhamak Badur; Jhala, Y.V.; Pandav, Bivash
    The occupancy, distribution and tiger density are important information for management and conservation policy formulation. Realizing this need, this study was undertaken. The major wild prey species of tiger are spotted deer (Axis axis), wild pig (Sus scrofa), sambar (Rucervus unicolor), swamp deer (Rucervus duvaucelli duvaucelli), barking deer (Muntiacus muntjak), hog deer (Heylaphus porcinus) and gaur (Bos gaurus) in Nepal. To evaluate the occupancy of tiger in Nepal's Terai Arc landscape (TAL), sign survey was conducted in 96 grids (area 225 Km2 ) in 14 districts, including PAs. To assess correlation of the tiger occupancy with the availability of wild prey, and the human disturbance with the habitat use by the tiger, the sign of human disturbances (fire, timber cut, fuel wood collection, sign of poaching) and prey presence were recorded during the winter season. To estimate the density of tigers wild prey in PAs of Nepal's TAL, distance sampling was conducted along the predefined line transects during the summer season
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    Understanding aspects of demography and resource partitioning mechanisms of large felids among with abundance and spatial distribution of prey in Similipal Tiger Reserve, Odisha
    (Wildlife Institute of India, Dehradun, 2024) Rathore, Harshvardhan Singh; Pandav, Bivash; Jhala, Y.V.
    This study investigates the crucial aspect of coexistence for large predators like tigers and leopards sharing the same landscape and delves into the population dynamics of these animals by identifying the mechanisms of resource partitioning. By acting as a window into the inner workings of the ecosystem, the study reveals how tiger and leopard populations function alongside each other. Identifying the factors that influence their ability to share the resources successfully is vital for developing more effective conservation strategies. This knowledge ultimately contributes to ensuring the long-term survival of both tigers and leopards in this landscape. A precise assessment of several demographic parameters is necessary to make informed management decisions for their conservation within this unique habitat. These parameters include population density, sex structure, recruitment, and survival rates. With this background, the study comes with the following objectives. (1) To assess the abundance and spatial distribution of prey in STR.(2) To assess the various demographic parameters of large felids (tiger and leopard) in STR. (3) To determine the mechanisms of resource partitioning of the tiger and the leopard in STR. Similipal Tiger Reserve is located in the Mayurbhanj district of Odisha, between86˚06' and 86˚36' East longitude and 21˚31' and 22˚02' North latitude. The study was carried out over three years (2019–2021) across eight ranges in the core area of STR: Chahala, Nawana North, Nawana South, and Pithabata South Wildlife in the northern core, and UBK, Jenabil, Bhanjabasa, and National Park in the southern core.