M Sc Dissertation(WII)
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Item Conserving Natural Heritage Through Genetic Assessment : The Case of Snow Leopards in Ladakh(Wildlife Institute of India, Dehradun, 2021) Vishnuvardhan; Jhala, Y.V.; Srinivas, YellapuNatural world heritage sites are landscapes that sustain rare ecological processes, provide crucial habitats for the survival of many iconic species of significance and provide a wealth of ecosystem services. A part of India’s natural heritage lies m its youngest landscape, the Himalayas. This natural heritage is an asset in itself due to its immense intrinsic values. Snow leopard, an elusive inhabitant of the cold desert represents an important cultural and ecological symbol of the Central and south Asian mountain systems and acts as a flagship as well as an umbrella species. This study has been designed to assess the genetic status of this vulnerable species distributed across the union territory of Ladakh using non-invasive genetic methods. The study site comprised of four distinct regions, Hemis-Leh, Kargil, Changthang and Nubra. Putative snow leopard scat samples (N=391) were collected from the study area. DNA was extracted from all the samples and a 148 bp Mt-DNA region was amplified with a carnivore specific primer. Successfully amplified samples were sequenced for species identification. From the 95 snow leopard positive samples 56 individuals were identified using a panel of 10 microsatellites. Sex identification was also done by using AMELY gene and results showed male biased sex ratio in Ladakh. PIDsib value was 3.8x1 O’4 was indicative of sufficient power of the microsatellite panel to discriminate between siblings in a population of 10,000 snow leopards. This study provides a baseline for future comparisons since increased anthropogenic development projects may fragment this contiguous population. Genetic integrity and large gene pools are essential for long term viability of species especially in the advent of climate change and anthropogenic modifications. This study using genetic markers on the snow leopard exemplifies the use of this important tool for natural heritage management and conservationItem Spatial Dynamics and Drivers of Nearshore Aggregations in Olive ridley Sea Turtles along the Gahirmatha Coast by(Wildlife Institute of India, Dehradun, 2024) Sarkar, Arnab Dey; Prabakaran, Nehru; Kumar, R.S.; Pandav, BivashOlive ridley sea turtles (Lepidochelys olivacea) exhibit a well-documented phenomenon known as nearshore aggregation during their breeding season. These aggregations, comprising large numbers of turtles in shallow coastal waters, are a common feature observed along most of the mass nesting beaches. The ecological benefits of such aggregations are multifaceted, potentially including enhanced predator avoidance and increased opportunities for mate encounter. The importance of studying these nearshore aggregations stems from their vulnerability during this period. Olive ridley turtles within these aggregations are susceptible to various threats, including bycatch mortality from fishing gear. Understanding the spatial and temporal dynamics of these aggregations is crucial for developing effective conservation strategies. The Gahirmatha nesting site presents a unique case due to the influence of the Brahmani-Baitarani River system. The substantial freshwater inflow and sediment discharge from this river system have resulted in a vast area of shallow seabed compared to other nesting grounds. This distinct ecological setting necessitates a dedicated investigation into the dynamics and influencing factors of nearshore aggregations specific to Gahirmatha. The study examined the distribution and density of olive ridley sea turtles near Gahirmatha, India, a critical nesting site, with a particular focus on how environmental factors influence the location of these nearshore aggregations. Surveys were conducted throughout the breeding season, recording turtle sightings and environmental data. The findings reveal that olive ridley turtles are not distributed randomly in the nearshore waters. Instead, they form concentrated aggregations in shallow depths (less than 5 km offshore and 5-15 meters deep) before nesting. The location and density of these aggregations were not static but shifted throughout the breeding season. During the pre-nesting season, turtles were more dispersed across a wider area. As the season progressed and nesting approached, the aggregation grew denser and shifted closer to the nesting beach. The study also identified distance from the coastline and the nesting beach as the key factors influencing the distribution of these nearshore aggregations. Additionally, the unique shallow seabed near Gahirmatha, created by the discharge from the Brahmani-Baitarani River, might influence the preferred depth range of turtles compared to other nesting sites. Understanding these dynamic aggregation patterns is crucial for effective conservation efforts. Protecting these areas is essential for the well-being of this globally significant olive ridley population. However, it's important to acknowledge that the exact locations of these aggregations can vary between years. This year's lower nesting numbers suggest fewer turtles arrived in the nearshore waters, potentially impacting the size and distribution of the observed aggregations. This study emphasizes the need for long-term studies to gain a more comprehensive understanding of these variations and the factors influencing them. The study suggests a targeted approach of focusing on areas with high turtle usage. By implementing stricter patrolling measures within these zones, the forest department can significantly reduce threats like bycatch mortality from fishing activities. This targeted approach would be more effective in safeguarding the turtles compared to focusing on reducing illegal fishing in the entire sanctuary, considering the limited resources available.Item Visitation Pattern of Mammalian Communities at Waterholes in Tadoba-Andhari Tiger Reserve(Wildlife Institute of India, Dehradun, 2021) Yathumon, M.A.; Nigam, Parag; Habib, Bilal; Gopi, G.V.Waterholes are an important component of management practices in wildlife conservation, especially in arid and semi-arid regions. It is of high conservation and management significance as it is a spatially restricted resource for wildlife. I studied visitation pattern of mammals at 54 waterholes in the core zone of Tadoba - Andhari Tiger Reserve, a dry deciduous forest in the central India. Visitations of mammal species were monitored continuously for four months using camera traps. Visitation frequencies of mammals at the waterholes were checked and compared between winter and summer seasons. Influences of (i) physical attributes of waterholes, (ii) distance between the waterholes and adjacent permanent water sources, (iii) distance to nearest road and (iv) the presence of tourism in the nearest road, on the visitations of mammals at waterholes were studied. It was found that there are differences in the number of visitations, total time spent and the average time spent in a visitation between mammal species and between same species in different seasons. Size of waterholes and artificial water supplementation influenced the visitations of some mammals at waterholes. Overlaps in the temporal visitation patterns of the prey species with that of the predator species were different for ambush predators and pursuit predators.Item Responses of Wild Ungulates to Anthropogenic Pressure and Perception of Local Communities Towards Conservation of Wild Ungulates in Dampa Tiger Reserve, Mizoram India(Wildlife Institute of India, Dehradun, 2021) Chakama, Joonu; Sathyakumar, S.; Kawlni, Lallaianpuii; Kolipakam, VishnupriyaWith the increasing anthropogenic pressures, conservation of ungulates is ever more crucial as they help in maintaining the forest structure. The impact of anthropogenic pressures such as hunting of wild ungulates by local communities in Mizoram, India, is limited and lacks reliable information. This study was conducted in Dampa Tiger Reserve (DTR), Mamit district, Mizoram from January-Mid May, 2021 to quantify the responses of wild ungulates to the anthropogenic pressures, as a measure of conservation efforts. This study focussed on the population and distribution of ungulates in Dampa Tiger Reserve (DTR), Mizoram and assessed how the ungulates responded to human use areas. Stratified systematic sampling was done in an intensive study area (40 km2) to assess the ungulate density, distribution and activity pattern. In addition to that, the perception and attitude of local communities towards wild ungulates were also assessed. Estimates of the distribution, population and activity pattern of ungulates were obtained using single season occupancy model and cameratrap based distance sampling method whereas the local people perception and attitude were analysed based on answers from the semi-structured interview. The study was carried out on the Teirei and Phuldungsei range of the DTR. A total of 40 grids (1 km2 each) were sampled following the above framework. The grids were sampled using Camera-based distance sampling for population estimation in which the cameras were placed at the centroid of the grid. The density of the ungulates in two areas (high and low human use) could not be compared as the anthropogenic disturbance was homogenous throughout the study area. However, the pooled density of wild pig (0.55±0.23) was the highest among the other species, followed by barking deer (0.28±0.06) and sambar (0.20±0.09). The activities of the ungulates were at the peak from the crepuscular period to early morning and late evening. Occupancy pattern showed that barking deer distribution was influenced by the food availability/ground cover including areas near human habitations whereas sambar occurrence was negatively influenced by non-forest and presence of anthropogenic disturbance. Perception survey revealed that villagers showed positive perception towards ungulate conservation, however, in contrast to these responses, conservation practices in DTR by the local communities still lacks as intensive hunting still prevails. This study highlights the impact of anthropogenic pressure towards ungulates and how strengthen management interventions is necessary to ensure the conservation of ungulates in DTR.Item Has conservation gone to the dogs? : ecological aspects of free ranging dogs of the Thar(Wildlife Institute of India, Dehradun, 2017) Mohandas, Monisha S.; Jhala, Y.V.; Qureshi, Qamar; Dutta, SutirthaOne of the few mammals to have a near-global distribution, dogs (Canis familiaris) are an introduced mammalian predator. Dogs have contributed to 11 vertebrate extinctions and are a potential threat to 188 threatened species globally. This study investigates population sizes, ranging patterns, behavioural activity, and resource utilisation of free-ranging dogs in Thar landscape, Rajasthan. 2. Using double sampling framework, I calibrated effort-standardized counts (C) with mark-recapture based abundances (𝑁̂) that was used to estimate dog abundances within human habitation. Landscape-scale dog abundance was estimated using vehicle transect based distance sampling. Home ranges of nine free-ranging dogs was determined using locations from radio-telemetry. Resource use was quantified as feeding durations on various food items based on continuous monitoring. Resource availability was quantified as wild prey and livestock carcass density using line transect based distance sampling. This study provides information on important aspects of free-ranging dog ecology and their impacts in Thar landscape. It provides the basis required for implementing dog control programs in the landscape focusing on the flagship and critically endangered great Indian Bustard Ardeotis nigriceps.Item Resource Selection and Conservation of Smooth coated otter Lutrogale perspicillata in and Around the Coringa Wildlife Sanctuary, Andhra Pradesh(Wildlife Institute of India, Dehradun, 2015) Prasad, Nadendla Leela; Sivakumar, K.; Johnson, J.A.; Hussain, S.A.Resource selection of Smooth-coated Otter Lutrogale perspicillata was studied in the Coringa Wildlife Sanctuary, where a two dimensional interface of fishermen-otter present: fishermen fishing in the habitat of otter and otters feeding in the aquaculture farms of fishermen. This is resulting in conflict between Otters and Humans in the region. In this context, this study was carried out to understand the extent of this conflict by studying the food habit of otters and ecological factors that could affect the otter distribution in this mangrove ecosystem. 2. The study was carried out from December 2014 to April 2015 in and around the Coringa Wildlife Sanctuary, which is located at the mouth of the Godavari River, in Andhra Pradesh. 3. Food habit of otters was studied by analysing their spraints that were collected from different parts of the Sanctuary. Habitat and distribution of otters were studied using belt transacts along creeks as otters mostly used banks of the creeks. Further, people perspectives towards otter and intensity of human-otter interface was studied using interview based questionnaire surveys. 4. It was found that the fishes cultured in the aquaculture farms were not present in the creeks of Coringa WLS. 6. The diet analysis of 81 spraints collected from December 2014 to March 2015 revealed that fish comprise of 99% of Smooth coated Otter diet. Of this major portion comprised of Mystus gulio, Oreochromis mossambicus and Liza tade. These species were also found in high abundance during the fish sampling from which relative abundance was calculated. This indicates that Otters in the sanctuary are opportunistic feeder rather than selective. 7. Mystus gulio (long whiskers catfish) found to be the major prey of otter in the Coringa . WLS, constituting 17.8% of weight of all food items found in the spraints and this fish was also eaten by many otters (found in 13.4% of spraints). M gulio was also the most common fishes of the Sanctuary. M gulio followed by Oreochromis mossambicus (Tilapia) constituting 14.6% of weight of all food items found in the spraints. 9. Although, all five major aquaculture species offish were found in the spraints of Otter but overall, the aqua farm fishes constituted only the 14.4% of weight of total foods items found in the spraints of otter. Of the total spraints collected, only 17.8% of spraints contained the aqua farm fishes and remaining 82.2 % otter spraints did not have. aqua farms fishes and these otters were seems to be eaten only the wild fishes. 10. The high abundance of invasive tilapia was found in the Ramannapalem creek, which is a less saline creeks adjoining with aqua farms and villages. This fish was the second most preferred diet of otters in the area. This fish breeds in the grasses that are at the banks of creeks. Breeding tilapia was a easier target for otters and therefore, otters were seen close to aqua farms. 11. The factors essential for Otter survival in were found to be more towards land and decrease with increasing distance from land. An ordinal regression model with sign intensity in three ranks revealed that the factors that are playa significant role in Otter distribution are distance from sea had a positive effect on Otter distribution (estimate = 0.403, Standard error =0.225 and P value= 0.073), Width of channel also had a positive effect to an extent (estimate =0.509, Standard error =0.273 and P value = 0.062). Depth of the creek had a negative effect (estimate= -0.624, Standard error = 0.322 and P value=O.053). 12. As the factors that are positively influencing Otter distribution are near villages Otters signs were also found highest in creeks near villages. Thus it was concluded that the presence of Otters mostly towards villages is probably due to presence of suitable habitat near villages rather than fish from aquaculture farms. 13. Fishermen's Traditional Ecological Knowledge of Otters in and around the Coringa Wildlife Sanctuary had also confirmed that otters largely feed in the wild but visit aqua farms occasionally for food or to play. Further, about 79% of people in the region felt that Otters visit their farms at night that confirms the nocturnal behaviour of Otters around human habitation, which is supported by previous studies 14. Further, most of fishermen (75%) believed that otters are high threat to aquaculture when compared to fishing cat and jackals. This is due to group hunting behaviours of otters, whereas fishing cats and jackals visit aquaculture ponds solitarily 15. Interestingly, nearly 11 % of fishermen felt that Otters have caused an income loss of 1-5% followed by 9% of respondents who claimed a loss of 10-30%. But, few farmers (2%) felt that Otters cause nearly 30-50% of loss, who were in the low income group and who can not offer even small loss in income. 16. Generalized Linear Model (GLM) with Poisson distribution revealed that both income and education of fishermen positively influenced their perspectives towards conservation importance of otters in the region. 17. Majority of fishermen (65%) believed that there was a decline in the sightings of otters and they have also believed that the population had been declined in the region. However, in contrast, about 13% of them felt that there was an increase in Otter population over years and most of these respondents who have also believed that high loss of income due to otters visits to their aqua farms. 18. Most of the aqua-farm owners admitted that they always scare and chase away otters when they visits their farms. Though only 11 % of them opted for killing does not mean that people have a positive attitude towards Otter. Boxplot analysis to understand the relationship between people's action towards visiting otters to their farms and their income and education, has revealed that the farm owners who had less income have tried to kill the visiting otters due to their poverty. 19. This study found that fishermen with poverty could not bear even the meagre loss caused by otters to them. Further, the study found that less educated people against the otters in the region. Therefore, additional livelihoods and awareness education to those poor fishermen need to be provided for the long term conservation of otters in the region. EGREE Foundation of Andhra Pradesh, a foundation established with support of GoI-UNDP-GEF Project to sustainably manage the Godavari estuarine has already initiated some programme in this regard but their programme should focus more on fishermen who are with low income 20. It is also proposed to have otter proof fencing for aquafarms especially those farms located along the Ramanapallam creeks. Developing eco- tourism in the sanctuary with the involvement of fishermen and small scale farm owners can also change their attitude towards otters.Item Interaction of Kiang (Equus kiang) with Livestok in Hanley Valley of Chanthang Wildlife Sanctuary, Ladakh(Wildlife Institute of India, Dehradun, 2009) Hussain, Asif; Qureshi, Qamar; Rawat, G.S.Hanley Valley «320 41' 27" N 790 04' 3.5") in Eastern Ladakh forms the western most extension of Tibetan plateau and has been recognized as an important biogeographic province in India (Indian Trans-Himalaya). This region harbors a rich array of wild and domestic ungulates. The area is also home to nomadic Changpa and Tibetan refugee herders. The political, social and ecological transformations have altered previous, well-established links between the pastoral population and their rangeland environment. Over the years, with growing integration of the local economy of Ladakh and with better development of cash markets, the pastoral community is fast losing its tolerance towards the kiang and it is increasingly seen as a competitor to livestock. The purpose of this study was to document this intensifying conflict between pastoralism and Kiang conservation, using resource selection functions. Data on habitat variables were collected on 4 fixed trails of varying length (3- 7 km) for kiang (with and without livestock presence) and livestock for use availability analysis. For food habits, micro-histological method in case of kiang and bite count method in case of livestock was used. Data on activity pattern of kiang was collected to examine change in response to livestock presence. Density and encounter rates were estimated using vehicle transects (n=5) of varying lengths (5-56 km). Livestock were followed (focal animal sampling) from dawn to dusk to estimate amount of forage removed. Availability of different habitat variables was estimated using ArcGIS 9.2. Total of 104 kiang groups before arrival of livestock and 187 kiang groups after livestock arrival to the area were recorded. Habitat use by kiang and livestock was significantly different (8 = 0.00016, P < 0.05). Habitat use by kiang before and after livestock arrival was found to be significantly different (8 = 0.013, P <0.05). Groups of kiang were observed (n=14) for time budget evaluation, 7 prior (640 min) and 7 (820 min) after livestock had come to the area. Activity pattern of kiang before and after livestock arrival was found to be significantly different (8 = 0.04, P <0.05). Food preference for kiang before and after livestock arrival was not found to be significantly different. Food preference for kiang and livestock was significantly different (6= 0.0000007, P < 0.05). Use-availability analysis suggested differential selection for food plants. Schoener's niche overlap for food items found moderate overlap between kiang, sheep and goat «60%) and high overlap between kiang and horse (>80%). Forage removed (kg) by sheep, goat and horse were 2.33 kg, 2.25 and 8.19 kg respectively. Total density and encounter rate for Hanley valley was 0.07 kiang/km2 and 0.45 kiang per km respectively. The difference in habitat use translated into Kiang using higher elevations while livestock used middle elevations more than available. Kiang used steep slopes whereas livestock used steep as well as gentle slopes more than available. Kiang used North-West aspect more than available. Kiang used vegetation communities dominated by graminoides while sheep-goat used communities dominated by shrub and forbs. Density and encounter estimates did not show considerable increase in kiang population compared to previous studies. Hence, the perception of people of kiang overstocking in the study area appears to be misplaced. Detailed perception studies should be carried out in the whole of Changthang and herder-centered participatory programmes need to be carried out on a large scale to ensure long term conservation of kiang in eastern Ladakh.Item Evaluating the importance of scale in estimating tiger populations(Wildlife Institute of India, Dehradun, 2007) Contractor, Deep; Jhala, Y.V.; Qureshi, QamarPopulation estimation is one of the most important aspects of ecological studies as it plays a pivotal role in establishing priorities for species specific conservation and for delineating management practices. The tiger serves as a flagship and umbrella species for conservation efforts in the Indian subcontinent but, unfortunately wild tiger populations are on a drastic decline owing to factors like poaching, habitat fragmentation and degradation. In such a scenario reliable population estimates prove to be of vital importance. Camera trapping technique has been widely used for population estimation of cryptic carnivores including tigers. An attempt was made, through this study, to arrive at population and density estimates for Corbett NP through camera trapping technique following the mark recapture framework and answering some key questions regarding the importance of sampling effort required for arriving at such reliable estimates. A total of 7865 trap nights yielded 358 captures of 103 individual tigers within an intensively sampled area of (MCP) 420.86 km2. The estimated density of tiger was 16.01 (±1.6) per 100 km2 for RPSV, a new approach to calculate effectively sampled area. These estimates coincided with the estimates using full MMDM method. Also, the conventional method of using half MMDM seems to overestimate the density. The estimated sampling effort required for arriving at accurate and precise estimates of the true population in terms of sampling occasions amounted to 35 - 40 days. Evaluation of the influence of trap density revealed that high trap density (25 traps/km2 ca.) is required to get reliable estimates of population irrespective of the underlying population/density gradient.Item Evaluation of Pugmark Census Technique(Wildlife Institute of India, Dehradun, 2001) Sharma, Sandeep; Jhala, Y.V.Effective conservation strategies hinge on reliable population estimation technique. The potential of pugmark as a tool for population estimation of tigers was statistically examined. Eleven variables were selected and they were found effective in discrimination between individual tigers. These variables also discriminated between male & female in a population of 10 known tigers with 100% accuracy. This sex discrimination modal was found 97.4% accurate during validation over three new known tigers. The above said variables were also robust for pooling left and right pugmark. The soil depth of range 0.5 cm to 2 cm was found to be ideal for PI P preparation, since the 11 predictor variables were examined to be insensitive towards shape and size change of pugmark due to substrate condition. Classification of 17 individual tigers was achieved with 97% accuracy using stepwise discriminant function analysis. The statistical protocol developed in this study was found to be 100% accurate in predicting the correct number of tigers and correct classification of pugmarks, during validation in a blind set simulated 'census-exercise' from a known number of tigers (some of the track sets used for this analysis were not used for developing the DFA model). Variability in pugmark tracings due to tracer's effect was found to be significant. ANOVA (p-value 0.002 with df-1, df-53) results suggest a significant difference between variables measured from tracings and those from photos. However, DFA was unable to discriminate between tracings and photographs suggesting that either could be used in the model. Seventy five percent of the "experts" (n=8) were 100% correct in deciphering individual tigers in a blind test involving 15 tiger pugmarks from 7 individual tigers. The remaining 2 experts overestimated the tiger numbers by 1. The experts had an accuracy of 92% (sd = 7.8) in correct classification of tiger pugmarks. The other groups of respondents, ecologists (n=11) and lay persons (n=15) overestimated the tiger numbers and had an accuracy rate of 670/0 (sd = 24), and 640/0 (sd = 6) respectively in classifying pugmarks correctly. This study suggests that pugmarks can be used as a tool for population estimation of tigers, if subjected to analytical protocol developed here in within the constraints outlined.