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Kumara, Honnavalli Nagaraj
- Estimate of Primate Density Using Distance Sampling in the Evergreen forests of the Central Western Ghats, India
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PDF Views:88
Authors
Affiliations
1 PG and Research Department of Zoology and Wildlife Biology, A.V.C. College (Autonomous), Mannampandal, Mayiladuthurai 609 305, IN
2 Salim Ali Centre for Ornithology and Natural History, Anaikatty (PO), Coimbatore 641 108, IN
1 PG and Research Department of Zoology and Wildlife Biology, A.V.C. College (Autonomous), Mannampandal, Mayiladuthurai 609 305, IN
2 Salim Ali Centre for Ornithology and Natural History, Anaikatty (PO), Coimbatore 641 108, IN
Source
Current Science, Vol 108, No 1 (2015), Pagination: 118-123Abstract
Although the evergreen forests of the Western Ghats harbour seven species of primates, estimate of their density is not available for most of the area. The Aghanashini Lion-tailed Macaque Conservation Reserve in central Western Ghats, a newly notified protected area in Karnataka, harbours lion-tailed macaque Macaca silenus, bonnet macaque Macaca radiata and Southern plains gray langur Semnopithecus dussumieri. We estimated their densities using line transect method. The estimate of cluster density for lion-tailed macaque, bonnet macaque and southern plains gray langur was 1.62, 4.28 and 10.67 groups/sq. km respectively, with the individual's density of 14.95, 12.40 and 25.06 individuals/ sq. km respectively. The conservation importance of the present findings is also discussed.Keywords
Density Estimate, Distance Sampling, Evergreen Forests, Line Transects, Primates.Full Text
- Linking Critical Patches of Sloth Bear Melursus ursinus for their Conservation in Meghamalai Hills, Western Ghats, India
Abstract Views :213 |
PDF Views:81
Authors
Santhanakrishnan Babu
1,
Tamilarasu Karthik
2,
Gopalakrishnan Srinivas
1,
Honnavalli Nagaraj Kumara
1
Affiliations
1 Salim Ali Centre for Ornithology and Natural History, Anaikatty, Coimbatore 641 108, IN
2 Wildlife Information Liaison Development Society, 96, Kumudham Nagar, Vilankurichi Road, Coimbatore 641 035, IN
1 Salim Ali Centre for Ornithology and Natural History, Anaikatty, Coimbatore 641 108, IN
2 Wildlife Information Liaison Development Society, 96, Kumudham Nagar, Vilankurichi Road, Coimbatore 641 035, IN
Source
Current Science, Vol 109, No 8 (2015), Pagination: 1492-1498Abstract
The study examines the distribution and factors regulating the sloth bear in a fragmented hills of Meghamalai in Western Ghats through occupancy framework. Indirect evidences were sought over 133 grids of 4 sq. km size between December 2011 and December 2012. Indirect evidences were recorded in 58 of 133 sampled grids that estimated naїve occupancy of 0.43 (p = 0.3180). Understorey cover negatively affected the detection of indirect evidences. The parsimonious model contained three covariates, viz. tree height, grass cover and anthropogenic disturbance. Overall occupancy of bear was 0.54, which is 25% higher than the naїve occupancy estimate. The study predicted higher proportion of evergreen forests with intermediate grass cover and less extent of disturbance determines the occupancy of bear in these hills. The 'critical link' connecting Periyar-Agastiyamalai hills and Anamalai hills is still active and supports high suitable sites for bears. It is suggested that Ammagajam-Upper Manalar Contiguity and Critical Link needs to be protected by appending with Meghamalai Wildlife Sanctuary.Keywords
Conservation, Critical Patches, Sloth Bear, Surrogate Species.Full Text
- Determinants of Occupancy and Burrow Site Selection by Indian Crested Porcupine in Keoladeo National Park, Bharatpur, Rajasthan, India
Abstract Views :235 |
PDF Views:97
Authors
Affiliations
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
Abstract Views :277 |
PDF Views:75
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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