Theses and Dissertations

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A Countryside carnivore: aspect of leopard ecology at Jawai, Rajasthan
(Wildlife Institute of India, Dehradun, 2017) Sharma, Ravi Kumar; Qureshi, Qamar; Das, Abhijit
1.Increasing human population and habitat fragmentation has impacted the large carnivore population across India. Leopard among pantherine is more tolerant to human disturbance and co-occur with humans in the wide variety of habitats. 2. Study was undertaken to understand status of leopard and factors responsible for its survival in human-dominated landscape. 3. Study was conducted in Jawai Dam Community Conservation Reserve from December 2016 to April 2017 in a semi-arid region of Pali, Rajasthan, India We examined villager's perception towards leopard by taking out the percentage of each response of respondents. Tolerance and religious view toward leopards was found significantly similar with each other, villagers has higher economic losses (livestock loss by leopards) than benefits (tourism activities) generated by hotel lobby. Villagers were examined to have minimal loss of human life and injuries by leopards, so it's easy to say about existence than co-existence or co-occurrence of both leopard and human in Proposed lawai Leopard Community Conservation Reserve.
A Forked Relationship : Understanding the Acoustic Communication Strategies in Sympatric Drongos
(Wildlife Institute of India, Dehradun, 2019) Lahiri, Sutirtha; Qureshi, Qamar; Kolipakam, V.
The competitive exclusion principle states that ecologically similar species cannot co-exist and will either go extinct or develop diverging traits, the concept of environment filtering regards the environment. Patterns of trait divergence vary depending on whether the species occur in sympatry or in allopatry. Sympatry is defined as the co-occurrence of more than one species in the same geographical area with overlapping ranges. If closely related species occur in sympatry, competition is likely to shape divergence in their ecological as well as in the sensory domain, example acoustic signals. Diverse animal taxa employ acoustic signals for a variety of functions including mate choice, species identification, resource defence and other ecological and social functions. The primary aim of an acoustic signal is to efficiently communicate information over relatively long distances. This information, however, is subjected to changes and distortions imposed by the physical structure of the habitat, as well as masking interference from co-occurring signals of other acoustically communicating species. Masking interference by background noise or the simultaneously vocalization of other species- especially ones closely related- incur several disadvantages to the vocalizing individual. Signals with similar features have a high potential of interference for the species vocalizing, as well as for the receiver interpreting it. These disadvantages- or costs- could be the failure to respond to appropriate signals and the unnecessary response to territorial or mating signals not meant for them. However, a number of animals communicate successfully even in noisy and crowded environments, and can locate mates with relatively high success rates. This suggests the presence of powerful strategies to deal with the transmission, detection and recognition of relevant signals. To avoid acoustic competition due to the effect of masking interference, animals partition the acoustic resource in the temporal, spatial and spectral domains. Closely related species tend to be physically and behaviourally more similar than distantly related species, and are likely to possess similar songs and singing behaviour. The relationship between phylogenetic relatedness and trait similarity is investigated by quantifying what is called the ‘phylogenetic signal’- the tendency of related species to resemble each other more than is expected by chance. As a result, acoustic interference is likely to occur more often among closely related species, and they may evolve divergent signals to compensate. Drongos (Dicruridae) are a group of highly vocal passerines known for their vocal plasticity. There is a great extent to which their vocal repertoire can range in terms of diversity and function. Apart from having a wide range of species-specific repertoire, drongos are also mimetic species known to mimic the calls of conspecifics as well as other animals present in their environment. This study, conducted in Dehing Patkai Wildlife Sanctuary, Assam, focused on the four species of sympatric drongos- the Hair-crested Drongo, Lesser Racket-tailed Drongo, Greater Racket-tailed Drongo and Bronzed Drongo- and how they partition their acoustic niche. The study also looks into the ecological adaptations to counteract the impact of masking interference by habitat and closely related congeners. Active acoustic recording was done to record the four species of drongos in the study area. Line transects were walked along trails to calculate the density of each drongo species. Passive acoustic recorders were used to study the vocal activity patterns in the drongos. The study found evidence of overlapping acoustic niche between the drongos. However, they were significantly different from each other in the individual acoustic parameters. The drongos also occupied separate height classes, barring the lesser racket-tailed and the greater racket-tailed drongo. However, the drongos did not separate in their vocal activity pattern, suggesting overlap in the diel pattern. The study thus gives insight into the acoustic space of a group of highly versatile bird as well as the strategies they adapt to avoid interfering each other and thus co-exist.
A Forked Relationship : Understanding the Acoustic Communication Strategies in Sympatric Drongos
(Wildlife Institute of India, Dehradun, 2019) Lahiri, Sutirtha; Qureshi, Qamar; Kolipakam, Vishnupriya
The competitive exclusion principle states that ecologically similar species cannot co-exist and will either go extinct or develop diverging traits, the concept of environment filtering regards the environment. Patterns of trait divergence vary depending on whether the species occur in sympatry or in allopatry. Sympatry is defined as the co-occurrence of more than one species in the same geographical area with overlapping ranges. If closely related species occur in sympatry, competition is likely to shape divergence in their ecological as well as in the sensory domain, example acoustic signals. Diverse animal taxa employ acoustic signals for a variety of functions including mate choice, species identification, resource defence and other ecological and social functions. The primary aim of an acoustic signal is to efficiently communicate information over relatively long distances. This information, however, is subjected to changes and distortions imposed by the physical structure of the habitat, as well as masking interference from co-occurring signals of other acoustically communicating species. Masking interference by background noise or the simultaneously vocalization of other species- especially ones closely related- incur several disadvantages to the vocalizing individual. Signals with similar features have a high potential of interference for the species vocalizing, as well as for the receiver interpreting it. These disadvantages- or costs- could be the failure to respond to appropriate signals and the unnecessary response to territorial or mating signals not meant for them. However, a number of animals communicate successfully even in noisy and crowded environments, and can locate mates with relatively high success rates. This suggests the presence of powerful strategies to deal with the transmission, detection and recognition of relevant signals. To avoid acoustic competition due to the effect of masking interference, animals partition the acoustic resource in the temporal, spatial and spectral domains. Closely related species tend to be physically and behaviourally more similar than distantly related species, and are likely to possess similar songs and singing behaviour. The relationship between phylogenetic relatedness and trait similarity is investigated by quantifying what is called the ‘phylogenetic signal’- the tendency of related species to resemble each other more than is expected by chance. As a result, acoustic interference is likely to occur more often among closely related species, and they may evolve divergent signals to compensate. Drongos (Dicruridae) are a group of highly vocal passerines known for their vocal plasticity. There is a great extent to which their vocal repertoire can range in terms of diversity and function. Apart from having a wide range of species-specific repertoire, drongos are also mimetic species known to mimic the calls of conspecifics as well as other animals present in their environment. This study, conducted in Dehing Patkai Wildlife Sanctuary, Assam, focused on the four species of sympatric drongos- the Hair-crested Drongo, Lesser Racket-tailed Drongo, Greater Racket-tailed Drongo and Bronzed Drongo- and how they partition their acoustic niche. The study also looks into the ecological adaptations to counteract the impact of masking interference by habitat and closely related congeners. Active acoustic recording was done to record the four species of drongos in the study area. Line transects were walked along trails to calculate the density of each drongo species. Passive acoustic recorders were used to study the vocal activity patterns in the drongos. The study found evidence of overlapping acoustic niche between the drongos. However, they were significantly different from each other in the individual acoustic parameters. The drongos also occupied separate height classes, barring the lesser racket-tailed and the greater racket-tailed drongo. However, the drongos did not separate in their vocal activity pattern, suggesting overlap in the diel pattern. The study thus gives insight into the acoustic space of a group of highly versatile bird as well as the strategies they adapt to avoid interfering each other and thus co-exist
A geospatial framework to assess ecological connectivity & their persistence for Central India Landscape.
(Wildlife Institute of India, Dehradun, 2019) Saini, Swati; Qureshi, Qamar
The study explored the occupancy probability for carnivores in 100 sq km grids and at 25 sq.km for herbivore to surrogate, their habitat suitability. These models were further used to model corridors between protected areas using Circuit theory least cost pathway analysis and estimated the changes in land use land cover in and around the identified corridors using the time series and change detection technique. The region of central India comprising five states viz. Madhya Pradesh, Maharashtra, Chhattisgarh, Odisha and Jharkhand has been taken up as study area. . The research work was carried out with three objectives: 1. Mapping Ecological connectivity between source populations of representative species of central Indian Landscape. 2. Assessment of spatio-temporal land use /land cover changes using time series & predictive change modelling in and around corridor habitats of the central Indian Landscape. 3. To evaluate the macro drivers of change across major linkages and attempt to model their persistence.
A Seroepizootiological Study of some Important Infectious Viral Diseases in Asiatic Lions (Panthera leo persica) and Sympatric Carnivores in Gujarat
(Wildlife Institute of India, Dehradun, 1999) Anand, R.; Mukherjee, S.K.
In an effort to understand the seroprevalence of viral infections and their impact on the Asiatic lions. a seroepizootiological study of canine distemper virus (CDV), feline parvo virus (FPV), feline immunodeficiency virus (FlY) and feline leukaemia virus (FeLV) was done in Asiatic lions, hybrid lions and sympatric leopards and domestic carnivores in five zoological parks in Ahmedabad, Baroda, Devaliya, Junagadh and Rajkot and the Gir National Park and Sanctuary. Fifty lions, including 13 hybrid lions, 24 leopards, 30 domestic cats and 196 domestic dogs were tested by agar gel immunodiffusion tests and dot-immunobinding assays for the serological evidence of above viruses. Antibodies to CDV were detected in 94.59 %. (35/37) of Asiatic lions, 76.92 % (10113) of the hybrid lions, 91.66 % (22/24) of the leopards, 70 % (211/ 30) of the domestic cats and 66.83 % (1311 196) of the domestic dogs. High seropositivity to CDV without overt symptoms of clinical disease suggested the possibility of a strain of low pathogenicity circulating or infecting these felids. It also indicated the probability of felid to felid transmission. 100 % seroprevalence to FPV antibodies was observed in both the domestic and exotic felids. Absence of clinical feline panleukopenia-like symptoms, suggested that FPV appeared to manifest itself as an inapparent infection in these domestic and non-domestic felids. 80% of lions, 62.5% of leopards and 80% of domestic cats sampled had high FPV antibody titres more than 1: 160, suggesting repeated infection with an endemic parvo-like virus. There were no detectable levels of antibodies to FIV or FeLV antigens in the lions, leopards and domestic cats. The study found in captive non-domestic felids, a high prevalence to CDV and FPV, two viruses, known to have caused Iarge-scale mortalities in captive and free-living non-domestic felids world-wide. It is suggested that movement, translocation or re-introduction of these seropositive felids may be associated with disease risks and hence movement and translocation of these felids must be done after subjecting them to standard quarantine and disease screening protocols. Vaccination may be considered using killed or other suitable viral vaccines
A Study of Heterospecific Flocking and Nonbreeding Bird Community Structure of Rajaji National Park
(Wildlife Institute of India, Dehradun, 1991) Rai, Nitin D.; Johnsingh, A.J.T.
Many workers have found a direct relationship between bird community structure and vegetation structure. To investigate this and describe the heterospecific flocking behaviour of nonbreeding birds I sampled five habitat types in the Dholkhand range of Rajaji National Park, U.P., India. Inter-habitat differences in flocking and bird community structure were considered. I used the line transect technique to sample bird communities. Mixed species flocks were observed to investigate why birds flock. The guild structure based on diet and foraging strategy showed a marked difference between habitats. Species richness was estimated using rarefaction analysis, a procedure that standardizes the unequal area of the different sites. I used a correlational approach to answer the question – what determines bird species richness ? Foliage height diversity, canopy cover, canopy height, canopy height difference, tree density, tree species numbers and cross sectional area, were used as the vegetation variables. Results indicate that none of the variables have strong predictive value though tree species number which is the only floristic measure of the habitats has a consistent influence independent of sample size. The guild structures suggest that the bird communities vary with floristic aspects, of the habitats. To test my hypothesis that flocking is a response to food availability I related bird densities, which is an indicator of food availability, to flocking tendencies and found a inverse relationship. I also found behavioural evidence to suggest that flocking is also an anti-predatory strategy.
A Study of Resource Seletion by Black Kites (Milvus migrans) in the Urban Landscape of National Capital Region India
(Wildlife Institute of India, Dehradun, 2013) Kumar, Nishant; Mohan, D.; Jhala, Y.V.
Black Kites are the scavenger and predator raptors of the old world. In India they are synanthropic and perform the ecological role of city scavengers. Abundance and distribution of these birds suffers change due to rapid infrastructural changes in the developing cities which likely limit or change spatial layout of the available habitat and food. Many cities in the old world (London, Cape Verde, Istanbul) have experienced decline in the population of Milvus kites owing to rapid urbanization. Indian sub-continent almost lost its main scavenger, white backed vultures, in the last century. After this loss; existence of black kites, the most abundant raptor of the old world proves very vital. On these lines I carried carry out this dissertation from December 2012 to April 2013. This study focused on a) estimating the abundance of Black Kites on the Ghazipur dump site and the abundance of nesting pairs in National Capital Region (NCR), b) evaluating factors influencing nesting habitat selection combined with a broad understanding of its foraging habits and c) estimating nest survivorship in the urban landscape. I studied these parameters at selective study sites in NCR by intensive counts of birds at Ghazipur and breeding pairs at nest sites across eight study sites. Nests were searched intensively at each site while I tried to develop and test a new method to count the kites on the Ghazipur dump. Data from 116 nests and nest sites covariates were used to model nest survivorship under Known Fate scheme in Programme MARK. For my first objective, I estimated the current abundance of nesting pairs of Black Kites at 7 study sites. It ranged from 4 pairs / km2 in Sagarpur to 67 pairs / km2 in North Campus area. Nesting kites were selective while choosing a nest site, as evident by significant partial correlation between nest density, food index and green cover. The sites at the best trade-off between green cover and food availability had the highest nest densities. While developing a new methodology, I estimated around 2400 kites on the Ghazipur dump. Through behavioural observations and broad examination of regurgitated pellets, I could confirm scavenging as well as predacious nature of Black Kites. The overall probability of a nest to produce a viable fledgling was 0.45. The nest survivorship was stage specific and varied with pre-laying, incubation or nestling stage. The lower survival probability (0.60) at pre-laying stage is likely because of surplus nest formation at sites with good foraging opportunities. Understanding the importance of kites in urban ecology, studies using individually marked birds will reveal vital details of their behavioural and physiological adaptations. If future long term studies are conclusive enough, may establish Black Kites as an umbrella species of urban ecology.
A STUDY OF THE ECOLOGY OF SELECT SPECIES OF WEEDS IN DIFFERENT VEGETATION TYPES OF NILGIRI BIOSPHERE RESERVE
(SACON, 2000) Mahajan, Maya V
Invasion by weedy species of plants has serious impact on natural and managed ecosystems. Weedy species invade agricultural lands, fallow lands, roadsides, disturbed forests and plantations. Invasion by such species modifies the ecosystem structure and function. Invading species may dominate and displace the native vegetation and cause extinction of certain native species, leading to alteration in the original biodiversity of an area. In recent years, biological invasion is being recognized as a serious threat to biodiversity conservation
A study of the ecology of select species of weeds in different vegetation types of Nilgiri Biosphere Reserve
(SACON, 2000) Mahajan, Maya V; Azeez, P A
Invasion by weedy species of plants has serious impact on natural and managed ecosystems. Weedy species invade agricultural lands, fallow lands, roadsides, disturbed forests and plantations. Invasion by such species modifies the ecosystem structure and function. Invading species may dominate and displace the native vegetation and cause extinction of certain native species, leading to alteration in the original biodiversity of an area. In recent years, biological invasion is being recognised as a serious threat to biodiversity conservation (Pimm and Gulpin 1989, Vitousek et al. 1996). In contrast to studies in agricultural fields, not much attention is given to plant invasion in natural ecosystems. Nevertheless, the colonisation of natural forest ecosystem by weedy species is growing as a threat. In recognition of the threats posed by plant invasions in natural vegetation and realising the scarcity of ecological information on various colonising plant species
A Study of Vigilance Behaviour of Chital (Axis axis) in Pench Tiger Reserve, Madhya Pradesh
(Wildlife Institute of India, Dehradun, 2009) Ghuman, Sartaj S.; Sankar, K.
Predation is an important agent of natural selection in animal communities and so vigilance behaviour has very high selection pressure acting upon it. During feeding bouts, unless plant density and biomass are high and food intake is limited only by the processing rates, herbivores tend to experience a trade-off between vigilance and feeding. Thus, vigilance as a behaviour pattern ought to be tightly regulated by the cost-benefit ratios. A study on vigilance behaviour of chital (Axis axis) was conducted at Pench Tiger Reserve, Madhya Pradesh from December 2008 to April 2009. The objectives of the study were to examine the determinants of individual and group vigilance in chital; and also to examine the t effect of conspecific behaviour on individual vigilance. I used scan sampling with fixed interval recording to estimate group vigilance and focal animal sampling with continuous recording to estimate individual vigilance levels. Three main factors that are known to affect :, vigilance from studies on other herbivores were examined: group size, density of animals in the group and visibility. Scanning behaviour was used as an estimate of vigilance. 'Scanning' refers to the state when the animal has its head above shoulder level and the senses of sight, smell and hearing are actively 'scanning' the environment. Individual vigilance was found to decrease with increasing group size, decreasing density and increasing visibility. In large groups adult males, fawns and adult females with fawns were found to be significantly more vigilant than females without fawns and yearling males. Group vigilance level was found to increase significantly with increasing group size, even as the group scan level decreased. Individuals seemed to reduce vigilance with relation to group size rather than the group vigilance level. The results suggest that individual chital do not adopt levels of scanning that maximize cooperative predator detection. The benefits of the group size effect vary with age-sex classes and other probable internal and external predation risk Factors and so vigilance is more likely governed by a combination of dilution and detection hypotheses mechanisms, the focus changing from one to the other with individual risk.
A Study on Bird Communities-Habitat Structure Relationships in Pench National Park, M.P.
(Wildlife Institute of India, Dehradun, 1997) Jayapal, R.; Qureshi, Qamar
There has been a number of studies on bird communities and their relationships with habitat features of floristics and physiognomy. In particular, the spatial distribution of bird communities along the axis of structural variables of a habitat has received a wider attention in the light of recent findings on landscape behaviour. Most of these works relate to either temperate or neotropical forests and our knowledge of community dynamics of tropical deciduous forests is very limited, for there has been hardly any comprehensive study in the tropics. The present study was done in the deciduous forests of the Pench National Park, Central India (M.P) between "November, 1996 and April, 1997 covering winter (November,1996-1anuary,1997) and summer (March, 1997-April, 1997). Seven distinct habitat types were identified for the study based on floristic and structural diversity. Seasonal data on 27 habitat structural variables were collected from bird-centered sampling plots. Point count census technique was employed to study the bird population. Principal Components Analysis (PCA) was used to determine the patterns of inter-relationships among the habitat structural variables. Canonical Correspondence Analysis (CCA) was done to understand the relationships of habitat components to the distribution of bird communities. For guild analysis, two different sets criteria were used to identify the guilds among the bird populations viz., food type and foraging behaviour. Twelve guilds were recognized based on the food type and, six among the insectivores with respect to foraging behaviour. The results of the PCA showed that habitat structural variables of tropical deciduous forests have a marked pattern of inter-relationships on two axes of landscape behaviour, viz., heterogeneity and complexity. But they failed to reveal any such segregation vis-a-vis bird community structure, as the scale of measurement did not address all the members of the community. The spatial distribution pattern of bird communities in relation to habitat architecture was shown by CCA to be not very tenacious; the interactions of other extraneous factors like floristics, habitat dynamics, phenophases of vegetation, disturbance, or interactions within the community may influence the habitat selection process. There was no linear correlation observed between Foliage Height Diversity and Bird Species Diversity; possible explanations and alternative views have been discussed briefly. The response of bird communities to floristics was found to be inconsistent across habitat types as positive linear relationship was detected only for Teak-dominant forests in winter, and for Anogeiss Boswellia forests and Cleistanthus collinus woodland in summer. Guild compositions of various habitat types were not found to be significanty different from each other though the seasonal change was consistent across all the habitats.
A Study on Breeding Behaviour of Oriental White-backed Vulture (Gyps bengalensis) in Anjarle and Deobag, Mahashtra
(Wildlife Institute of India, Dehradun, 2011) Kambale, Asish Atmaram; Sivakumar, S.; Mohan, D.
This study was aimed to understand the current status, distribution pattern, habitat characteristics, nesting success and nesting behaviour of Oriental Whitebacked vulture in the Konkan coast during a breeding season between December 2010 and May 2011. A total of 24 sites either nesting or feeding were located all along the Konkan coasts of Maharashtra during the survey using area search method as well as interview based techniques. Study shows that there was no significant difference in the habitats of both active and inactive nesting sites in the Konkan coast which indicates that the decline of nesting population of vulatures in the region may not be exclusively due to habitat destruction
A study on ethno-flora with special reference to Traditional Health Care System (THCS) in western Ladakh, Jammu & Kashmir.
(Wildlife Institute of India, Dehradun, 2013) Angmo, Kunzes; Adhikari, B.S.
A study on ethno-flora with special reference to traditional health care systems (THCS) was conducted in Western Ladakh, Jammu & Kashmir (Indian Trans-Himalaya) during 2009-2013. The major objectives of the study were: i) to study and compare the traditional health-care system across major ethnic groups (Boto, Balti and Dards) in Suru, Wakha-chu and Lower Indus valleys, ii) to document the Traditional Knowledge System (TKS) across various ethnic groups, and iii) to assess the conservation status of ethno-medicinal plants in the study area. To meet the objectives of the study a detailed field investigation was undertaken in all the valleys. The field work involved questionnaire survey and group discussions in the three valleys to document traditional healthcare system (THCS), perception of people and allopathic doctors regarding THCS (objective 1); Interviews of local healers and different sections of the society to assess the status of traditional knowledge (objective 2); and Rapid survey of wild medicinal plants across various land forms, habitat and vegetation types so as to ascertain the distribution of ethno-flora across various landforms, and ethnoecology and conservation prioritization of Ethno-flora (objective 3). The study area is located above 2700m altitude and is characterized by unique geographical and socio-cultural attributes. Traditional medicine is one of the tangible heritage of the local people in Ladakh, which has been an indispensable source of both preventive and curative medicine.
A study on floristic diversity and plant functional types across various landforms in upper Dhauli valley, Nanda Devi Biosphere Reserve, Western Himalaya.
(Wildlife Institute of India, Dehradun, 2016) Kumar, Amit; Adhikari, B.S.; Rawat, G.S.
In ecological systems, vegetation communities are shaped by various physiographic and edaphic factors which determine their structural and functional attributes. In Trans- Himalayan region of the state of Uttarakhand, limited studies on linkages of floristics, patterns of diversity in various vegetation communities and landforms are available. The region faces disturbances due to various natural and anthropogenic causes. The present research work attempts to assess the diversity of vascular plants, plant community structure and plant functional types (PFTs) in various landforms and physiognomic units in Upper Dhauli Valley, a cold-arid region and buffer of Nanda Devi Biosphere Reserve. This research work has not only generated information on the baseline ecological characteristics of various plant species and communities but also provides valuable management implications. The study is summarized in the following paragraphs. The Upper Dhauli Valley (UDV; ca. 727.7 km2; 30°46-54’N and 79°45-51’E) in Nanda Devi Biosphere Reserve was selected for intensive study. The UDV was added as a part of buffer zone of NDBR in 2002 and among the least studied valleys of the region with respect to floristics, floral assemblages and vegetation structure. It has three major watersheds namely, Amrit Ganga, Satyagad and Ganesh Ganga. The present study is based on the extensive surveys of various landscape features, landforms and physiognomic units. Reconnaissance survey in the entire valley was conducted in the year 2011. The field work comprised of floristic survey, systematic collection and record of plant specimens, vegetation quantification and collection of soil samples followed by laboratory analysis
A study on habitat use and food habits of swamp deer (Cervus duvauceli duvauceli) in Jhilmil Tal, Haridwar Forest Division, Uttaranchal
(Wildlife Institute of India, Dehradun, 2009) Tiwari, Rachna; Rawat, G.S.
Habitat use and food habits of the swamp deer (Cervus duvauceli duvauceli) were studied in and around Jhilmil Jheel Conservation Reserve (JJCR), Uttarakhand, during June 2006 and June 2008. This population of swamp deer was recently rediscovered in the state and warranted an ecological study and conservation initiative because the habitat around this study area is heavily fragmented due to expansion of agriculture, habitation and various other land use practices. Therefore, this study was initiated. The major objectives were: i. ii. iii. To study seasonal variation in habitat use pattern and food habits, Activity pattern, Population structure and habitat condition, and iv. Identify threats and suggest conservation measures. Habitat evaluation of various potential (but fragmented) habitat blocks in Jhilmil Jheel Conservation Reserve area and surrounding Banganga wetland revealed that they bear a close resemblance with the prime swamp deer habitat both in terms of structure and composition of key habitat variables.
A study on predation ecology of large carnivores with special reference to human-carnivore conflicts in Pench Tiger Reserve, Madhya Pradesh, Central India
(Wildlife Institute of India, Dehradun, 2022) Chatterjee, Anindita B.; Sankar, K.; Qureshi, Qamar; Jhala, Y.V.
Seven years of data (2008 – 2015) resulted in phot-capture of 96 unique individual tigers in the study area. The estimated survival rate of individual tigers was high. Survival of female tigers were higher than that of the male tigers but the range was overlapping. Apparent survival and transitional probabilities were best explained by gender specific models. Survival constant was selected as the best model for estimating growth rate of tigers. Calculated annual growth rate was 13% with no observed sex bias.
A STUDY ON REPRODUCTIVE BEHAVIOUR OF NICOBAR LONG-TAILED MACAQUE (MACACA FASCICULARIS UMBROSUS) IN NICOBAR ISLANDS, INDIA
(SACON, 2018) Pal, Arijit; Kumara, H N
Nicobar long-tailed macaques (Macaca fascicularis umbrosus) live in three small isolated catastrophic prone Nicobar Islands. This study was conducted to understand the strategies adapted by these macaques to survive on such stressful condition, and compare it with other sub-species distributed in varying environmental conditions. The study suggested a high degree of similarities in demographic traits and social organization between the sub-species, which reflected the high adaptability of these macaques to manage the life-history traits by coping with the stressful condition. Contrasting to other sub-species, the distinct behavioral traits like the variation in age-sex ratio and non-seasonal breeding pattern in these macaques are the adaptive strategies to achieve the conservative life-history traits to maximize the reproductive output. Competition for mate resources was very evident in M. f. umbrosus, where individuals of both the sexes were involved in intra and inter-sexual competition to increase their reproductive success. Social hierarchy has a direct impact on the heterogeneous distribution of mate and food resources between individuals with different social status, which ultimately shapes the social organization in M. f. umbrosus. Consequently, to balance the disadvantages of living in such hierarchical group, individuals make a trade-off by adopting different behavioral strategies through policing specific inter-individual relationships. These macaques were involved in between-group contest to compete for food and mate resources rather than the territory defense. This study provided first-ever information about demography, social organization, reproductive behaviors, birth seasonality, and intra and inter-group competition in Nicobar long-tailed macaques. It also revealed that in due course of interactions with its environment, a species could become flexible with life history traits and adopt different strategies to increase survivability as well as inclusive fitness.
A study on the breeding biology of the Nicobar Megapode Megapodius nicobariensis
(SACON, 2000) Sivakumar, K; Sankaran, Ravi
The family Megapodiidae consists of 22 species in seven genera, most of which are island forms occurring in Australia, New Guinea and surrounding islands, eastern Indonesia, the Philippines, Niuafo’ou island, the Palau and Mariana islands and the Nicobar islands. Thirteen of these 22 species are currently threatened by habitat destruction, introduction of predators and over-exploitation of eggs. The megapodes are an unique group of birds as they utilise external sources of heat to incubate their eggs. Megapodes exploit external heat sources in two ways. Some species lay eggs in burrows in geothermally heated soil, or on exposed beach, and are called burrow nesters (e.g. Macrocephalon maleo). Other species construct mounds of sand, soil and decomposing vegetation within which they lay eggs and are called mound nesters (e.g. Megapodius freycinet). The chicks are supra-precocial; they are able to fly soon after emerging from the mound or burrow, and receive no parental care.
A study on the resource dependence, human-wildlife conflict and community participation in forest management in Alaknand basin, Uttarakhand.
(wildlife Institute of India, Dehradun, 2018) Manral, Upma; Hussain, S.A.; Badola, Ruchi
Himalayan mountains are highly dynamic systems with both natural and anthropogenic disturbances acting as integral drivers of natural system dynamics in the region. The consequent changes brought into the system determine ecosystem productivity and the flow of ecosystem services to the humans. Any degradation of ecosystem functions and services will increase both the environmental and socioeconomic vulnerability of mountain communities which are highly reliant on natural systems, particularly forests of the area. The objectives of the study were to: a) quantify the extent of extraction of plant resources in different villages located at different elevations; b) assess the availability of major phyto-resources in and around the villages and surrounding forests along elevational gradient in the Alaknanda river basin; c) assess the extent of human-wildlife conflicts affecting the livelihood in the study area; and d) measure the contribution of community forest management practices in livelihoods of local communities. Four hypothesis were framed as: a) patterns of both availability and the extraction of forest resources in the study area xi change along the elevational gradient; b) human–wildlife conflicts negatively impact livelihood generation of affected communities; c) community forest management practices play a role in augmenting livelihood of local communities in the area; and d) better managed forests in an area are the result of community participation in forest management
A study on the structure and composition of forests along an altitudinal gradient in upper Bhagirathi catchment, Garhwal Himalaya.
(Wildlife Institute of India, Dehradun, 2001) Uniyal, Sanjay; Rawat, G.S.; Biswas, Sas
The present study highlighted the role of anthropogenic factors in distribution of plant communities in addition to altitude, aspect and slope. Market oriented economy has influenced the ethnobotanical knowledge of the local people. Though human-induced pressures are increasing in the area, still the status of forests in Bhagirathi valley is satisfactory compared to neighbouring areas. Hence, proper conservation and scientific management of such rich and diverse forest in small watersheds should be taken up on a priority basis. Data were collected from primary and secondary sources. Field work (primary source) was carried out during July 1996 to July 1999. Stratified random sampling was done for quantification of various vegetation and site parameters. The study area lies between 780 18' to 780 57' E long and 300 30' to 31 0 08' N lat. It covers an area of ca 2050 sq.km. and has an altitudinal gradient of 279 to 6600 m. For the intensive work two representative watersheds viz., north facing Duggada watershed (DWS) and south facing Bhatwari watershed (BWS) were selected. Objectives of the study include: preparation of baseline vegetation maps of the area, assessment of forest structure and composition, quantification of available woody biomass, documentation of ethnobotanical knowledge of local people and assessing the conservation status of rare plants in the area.