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Mukherjee, Aditi
- Determinants of Occupancy and Burrow Site Selection by Indian Crested Porcupine in Keoladeo National Park, Bharatpur, Rajasthan, India
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Authors
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1 Salim Ali Centre for Ornithology and Natural History, Anaikatty (Post), Coimbatore 641 108, IN
1 Salim Ali Centre for Ornithology and Natural History, Anaikatty (Post), Coimbatore 641 108, IN
Source
Current Science, Vol 112, No 12 (2017), Pagination: 2440-2448Abstract
We examined factors responsible for spatial occupancy and burrow site selection for permanent occupancy by Indian crested porcupine in Keoladeo National Park, Bharatpur, Rajasthan, India. We employed occupancy framework to examine a priori hypotheses and to obtain detection histories of faecal droppings and burrow occurrence. The detection probability (0.19 ± 0.05SE) and occupancy (0.28 ± 0.05SE) of burrow sites were lower than those of faecal deposits (0.33 ± 0.029SE and 0.71 ± 0.06SE) respectively. The rodents avoided areas with water cover and selected those closer to the boundary of nearby agricultural fields at higher elevation as burrow sites. None of the considered covariates influenced their spatial occupancy. This study infers the strategic placement of burrows by these apex ecosystem engineers, also providing crucial ecological niche for various other co-occupants.Keywords
Burrows, Hystrix indica, Occupancy Modelling, Site Selection, Spatial Occupancy.Full Text
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- An Updated Account of Mammal Species and Population Status of Ungulates in Keoladeo National Park, Bharatpur, Rajasthan
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Authors
Affiliations
1 Salim Ali Centre for Ornithology and Natural History, Anaikatty, Coimbatore 641 108, IN
2 Guru Gobind Singh Indraprastha University, University School of Environment Management, Sector 16C, Dwarka, New Delhi 110 078, IN
1 Salim Ali Centre for Ornithology and Natural History, Anaikatty, Coimbatore 641 108, IN
2 Guru Gobind Singh Indraprastha University, University School of Environment Management, Sector 16C, Dwarka, New Delhi 110 078, IN
Source
Current Science, Vol 113, No 01 (2017), Pagination: 103-111Abstract
This study documents the present status of mammals in Keoladeo National Park (KNP) and assesses the population structure of ungulates. It provides a comprehensive account of the mammal diversity of the park and aims to compare the change in mammalian species account ever since the park became a protected area. We employed line transect surveys for density estimation of ungulates. We report local extinction of eight species since 1966, and extant diversity of 34 mammalian species in KNP. The estimated densities of chital, feral cattle, nilgai, wild boar and sambar were 52.37, 33.66, 13.68, 3.21 and 0.32 individuals/km2 respectively. Although blackbuck has become locally extinct and sambar density has significantly reduced, chital and nilgai as habitat generalists have increased in density in the last 25 years, which has contributed to an overall increase in ungulate population density in KNP. The mammalian diversity has changed substantially with local extinction of some carnivores and constant change in the habitat condition.Keywords
Distance Sampling, Density, Local Extinction, Mammal Account, Population Dynamics, Ungulates.Full Text
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