Parag Nigam

ORCID: 0000-0001-9472-6897
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Research Areas
  • Wildlife Ecology and Conservation
  • Genetic diversity and population structure
  • Genetic and phenotypic traits in livestock
  • Rangeland Management and Livestock Ecology
  • Identification and Quantification in Food
  • Bat Biology and Ecology Studies
  • Species Distribution and Climate Change
  • Wildlife-Road Interactions and Conservation
  • Animal Behavior and Welfare Studies
  • Animal Ecology and Behavior Studies
  • Animal Diversity and Health Studies
  • Genomics and Phylogenetic Studies
  • Amphibian and Reptile Biology
  • Geographies of human-animal interactions
  • Environmental DNA in Biodiversity Studies
  • Ecology and Vegetation Dynamics Studies
  • Human-Animal Interaction Studies
  • Ecology and biodiversity studies
  • Animal Disease Management and Epidemiology
  • Primate Behavior and Ecology
  • Microbial Inactivation Methods
  • Evolution and Genetic Dynamics
  • Listeria monocytogenes in Food Safety
  • Zoonotic diseases and public health
  • Brucella: diagnosis, epidemiology, treatment

Wildlife Institute of India
2016-2025

Academy of Scientific and Innovative Research
2024

New Orleans Public Library
2020

Universidade Federal de Pernambuco
2003

Kerala Veterinary and Animal Sciences University
1999

Increasing habitat fragmentation leads to wild populations becoming small, isolated, and threatened by inbreeding depression. However, small may be able purge recessive deleterious alleles as they become expressed in homozygotes, thus reducing depression increasing population viability. We used whole-genome sequences from 57 tigers estimate individual mutation load a small-isolated two large-connected India. As expected, the had substantially higher average genomic (

10.1073/pnas.2023018118 article EN cc-by-nc-nd Proceedings of the National Academy of Sciences 2021-11-30

Tigers have lost 93% of their historical range worldwide. India plays a vital role in the conservation tigers since nearly 60% all wild are currently found here. However, as protected areas small (<300 km2 on average), with only few individuals each, many them may not be independently viable. It is thus important to identify and conserve genetically connected populations, well maintain connectivity within them. We collected samples from (Panthera tigris tigris) across used genome-wide SNPs...

10.1038/s41598-017-09748-3 article EN cc-by Scientific Reports 2017-08-22

Abstract In the human‐dominated epoch of Anthropocene, nations worldwide are trying to adopt a variety strategies for biodiversity conservation, including flagship‐based approaches. The Asian elephant ( Elephas maximus ) plays pivotal role as flagship species in India's conservation efforts, particularly within its tropical forest ecosystems. As country harboring largest population among 13 range countries, offer valuable insights other countries. This study elucidates paradigm by outlining...

10.1002/inc3.38 article EN cc-by Integrative Conservation 2024-02-25

Home range and food habits of tigers ( Panthera tigris tigris) were studied in Sariska Tiger Reserve from July 2008 to June 2009. Three (one male two females) radio-collared reintroduced Ranthambhore Reserve, Western India during 2008-2009. The monitored periodically through ground tracking using “triangulation homing techniques.” estimated annual home ranges 168.6 km 2 181.4 for tiger tigress-1 respectively. summer tigress-2 was 223.4 . In total, 115 kills 103 scats collected study the...

10.1177/194008291000300305 article EN Tropical Conservation Science 2010-09-01

Abstract Chhattisgarh, India, harbours a metapopulation of 250–300 Asian elephants Elephas maximus that has expanded its range from neighbouring states since 2000. Elephants in the state occur across mosaic forests interspersed with agricultural settlements, leading to frequent interactions people, some which culminate conflict. We assessed patterns crop losses as result elephant incursions, at two spatial scales. found widespread losses, 1,426 settlements and around 10 forest divisions four...

10.1017/s0030605324000930 article EN cc-by-nc-nd Oryx 2025-01-17

The Sundarbans tiger inhabits a unique mangrove habitat and are morphologically distinct from the recognized subspecies in terms of skull morphometrics body size. Thus, there is an urgent need to assess their ecological genetic distinctiveness determine if tigers should be defined managed as separate conservation unit. We utilized nine microsatellites 3 kb four mitochondrial DNA (mtDNA) genes estimate variability, population structure, demographic parameters visualize historic contemporary...

10.1371/journal.pone.0118846 article EN cc-by PLoS ONE 2015-04-28

Faecal samples have become an important noninvasive source of information in wildlife biology and ecological research.Despite regular use faeces, there is no universal protocol available for faeces collection storage to answer various questions biology.In this study we collected 1408 from ten different species using a dry sampling approach, achieved 77.49% 75.25% success rate mitochondrial nuclear marker amplifications respectively.We suggest framework the same questions.This provides easy,...

10.18520/cs/v116/i11/1878-1885 article EN Current Science 2019-06-10

Abstract Large carnivores play an important role in the functioning of ecosystems, yet their conservation remains a massive challenge across world. Owing to wide‐ranging habits, they encounter various anthropogenic pressures, affecting movement different landscape. Therefore, studying how large adapt dynamic landscape conditions is vital for management and policy. A total 26 individuals 4 species sex age classes ( 14 Panthera tigris, 3 pardus, 5 Cuon alpinus, Canis lupus pallipes ) were GPS...

10.1002/ece3.7156 article EN Ecology and Evolution 2021-01-22

Gaur, which became locally extinct before 1995 in Bandhavgarh Tiger Reserve (BTR), Central India, is an endangered animal per Schedule - I of the Indian Wildlife Protection Act (1972). A re-introduction program was therefore created to rebuild gaur population BTR, both enhance long-term survival species and restore natural biodiversity. After re-introduction, home range, habitat use food habits (Bos gaurus gaurus) were studied from January 2011 2012. Nineteen gaurs (five males three...

10.1177/194008291300600108 article EN cc-by-nc Tropical Conservation Science 2013-03-01

Asian elephants are endangered while they have faced ~70% population decline in India the last 60 years. Climate change projections indicate exacerbation of ongoing habitat loss (>40%) by 2070, potentially impacting genetic structure wild across India. Therefore, we provide consolidated baseline data on diversity and four eco-regions India, i.e., north-western (NW), north-eastern (NE), east-central (ECI), southern (SI), to identify populations at greater risk further divergence. We genotyped...

10.1016/j.gecco.2021.e01888 article EN cc-by-nc-nd Global Ecology and Conservation 2021-10-26

Abstract Eld's deer ( Rucervus eldii ) with three recognised subspecies R. e. eldii, thamin, and siamensis represents one of the most threatened cervids found in Southeast Asia. The species has experienced considerable range contractions local extinctions owing to habitat loss fragmentation, hunting, illegal trade across its distribution over last century. Understanding patterns genetic variation is crucial for planning effective conservation strategies. This study investigated...

10.1038/s41598-021-82183-7 article EN cc-by Scientific Reports 2021-01-28

Despite appreciable advances in carnivore ecology, studies on small cats remain limited with research India being skewed towards large cats. Small are more specialized than their larger cousins terms of resource selection. Studies cat population and habitat preference critical to evaluate status ensure better management conservation. We estimated abundance two widespread cats, the jungle cat, rusty-spotted investigated associations based camera trap captures from a central Indian tiger...

10.1371/journal.pone.0233569 article EN cc-by PLoS ONE 2020-06-04

Summary Elephant ranges in Asia overlap with human-use areas, leading to frequent and often negative two-way interactions, a fraction of which result human fatalities. Minimizing such interactions rests on gaining mechanistic understanding their patterns underlying processes. In Chhattisgarh (India), rewilding population 250–300 elephants that have recently expanded range from neighbouring states through dispersal has been causing annual losses &gt;60 lives. Using logistic regression models,...

10.1017/s0376892923000115 article EN Environmental Conservation 2023-03-31

The last surviving wild population of the Kashmir red deer (Cervus elaphus hanglu) or Hangul inhabits Dachigam National Park located near Srinagar city Kashmir, India. This paper presents data from February 2001 to December 2009 on habitat use patterns and food habits deer. Investigations based surveys along trails indicate that showed significant differences in different types (F = 6.49; P 0.001) between seasons. Males utilization both within a season 3.63; ≤ 0.013) seasons 1.50; 0.087)....

10.1080/03949370.2015.1018955 article EN Ethology Ecology & Evolution 2015-05-26

Recent declines in large herbivores have led to significant conservation efforts globally. However, the niche-specific megaherbivores residing outside protected areas face more imminent extinction threats. Swamp deer, obligate grassland-dwelling endemic cervid is most extinction-prone megaherbivore Indian subcontinent. Limited information on distribution and habitat status pose management challenges for remaining fragmented populations north, north-east central India. To this end, we...

10.1016/j.gecco.2020.e01263 article EN cc-by-nc-nd Global Ecology and Conservation 2020-09-16

The home range size is an important parameter required for effective conservation and management of a species. Home ranges three radio collared Bengal tigers (Panthera tigris tigirs) (one adult female or AF, one male AM sub-adult SAM) were studied between March 2008 December 2011 in Pench Tiger Reserve (PTR), Madhya Pradesh, Central India. Using 95% Minimum Convex Polygon (MCP), the estimated AF (n= 750 locations) was 43 km², 118 55.1 km2 SAM 734 52.2 km2. Fixed Kernel (FK), 32.1 64.1 19.1...

10.2461/wbp.2012.8.4 article EN Wildlife Biology in Practice 2012-09-22

Summary Grassland habitats currently face severe anthropogenic exploitation, thereby affecting the survival of grassland-dependent biodiversity globally. The biodiversity-rich grasslands India lack quantitative spatiotemporal information on their status. We evaluated status upper Gangetic Plains in 2015 and compared it with those from 1985, 1995 2005. On-ground mapping visual classifications revealed a 57% decline these between 1985 (418 km 2 ) (178 ), mostly driven by habitat conversion...

10.1017/s0376892923000140 article EN Environmental Conservation 2023-06-22

Abstract The swamp deer Rucervus duvaucelii is the largest grassland-dwelling endemic cervid of India and Nepal. With a declining population trend across its range, this species found in fragmented habitats northern, north-eastern central south-western northern subspecies occurs small wetland patches states Uttarakhand Uttar Pradesh has lost most habitat last century. Information about distribution upper Gangetic plains limited, except Jhilmil Jheel Conservation Reserve around Bijnor barrage...

10.1017/s0030605318000078 article EN Oryx 2018-07-30

Abstract In multipredator systems, group sizes of social carnivores are shaped by the asymmetric intraguild interactions. Subordinate experience low recruitment rates as an outcome predation pressure. South and Southeast Asia, Tiger ( Panthera tigris ), Dhole Cuon alpinus Leopard pardus ) form a widely distributed sympatric guild large carnivores, wherein tigers apex predators followed dhole leopard. this study, we attempted to understand variation in pack size carnivore, dhole, at two...

10.1002/ece3.7380 article EN cc-by Ecology and Evolution 2021-03-23

Endemic to the Indian subcontinent, sloth bear (Melursus ursinus) is a threatened species, present in fragmented habitats across India. Field techniques such as direct observation and camera trapping alone are not sufficient may be explicit enough understand monomorphic species like at larger spatial scales. In this study, we looked into genetic structure, variability population demographics amongst extant populations highly Vidarbha landscape, using panel of 13 microsatellite markers with...

10.3390/d16020074 article EN cc-by Diversity 2024-01-24
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