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| Author | Durbach, I., Borchers, D., Sutherland, C., Sharma, K. | ||||
| Title | Fast, flexible alternatives to regular grid designs for spatial capture–recapture. | Type | Research Article | ||
| Year | 2020 | Publication | Methods in Ecology and Evolution | Abbreviated Journal | |
| Volume | Issue | Pages | 1-13 | ||
| Keywords | camera trap, population ecology,sampling, spatial capture-recapture, surveys | ||||
| Abstract | Spatial capture–recapture (SCR) methods use the location of detectors (camera traps, hair snares and live-capture traps) and the locations at which animals were detected (their spatial capture histories) to estimate animal density. Despite the often large expense and effort involved in placing detectors in a landscape, there has been relatively little work on how detectors should be located. A natural criterion is to place traps so as to maximize the precision of density estimators, but the lack of a closed-form expression for precision has made optimizing this criterion computationally demanding. 2. Recent results by Efford and Boulanger (2019) show that precision can be well approximated by a function of the expected number of detected individuals and expected number of recapture events, both of which can be evaluated at low computational cost. We use these results to develop a method for obtaining survey designs that optimize this approximate precision for SCR studies using count or binary proximity detectors, or multi-catch traps. 3. We show how the basic design protocol can be extended to incorporate spatially varying distributions of activity centres and animal detectability. We illustrate our approach by simulating from a camera trap study of snow leopards in Mongolia and comparing estimates from our designs to those generated by regular or optimized grid designs. Optimizing detector placement increased the number of detected individuals and recaptures, but this did not always lead to more precise density estimators due to less precise estimation of the effective sampling area. In most cases, the precision of density estimators was comparable to that obtained with grid designs, with improvement in some scenarios where approximate CV(¬D) < 20% and density varied spatially. 4. Designs generated using our approach are transparent and statistically grounded. They can be produced for survey regions of any shape, adapt to known information about animal density and detectability, and are potentially easier and less costly to implement. We recommend their use as good, flexible candidate designs for SCR surveys when reasonable knowledge of model parameters exists. We provide software for researchers to construct their own designs, in the form of updates to design functions in the r package oSCR. |
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Call Number  |
Serial | 1618 | |||
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| Author | Changxi, X., Bai, D., Lambert, J. P., Li, Y., Cering, L., Gong, Z., Riordan, P., Shi, K. | ||||
| Title | How Snow Leopards Share the Same Landscape with Tibetan Agro-pastoral Communities in the Chinese Himalayas | Type | Journal Article | ||
| Year | 2022 | Publication | Journal of Resources and Ecology | Abbreviated Journal | |
| Volume | 13 | Issue | 3 | Pages | 483-500 |
| Keywords | habitat use; landscape ecology; occupancy model; Qomolangma; Panthera uncia | ||||
| Abstract | The snow leopard (Panthera uncia) inhabits a human-altered alpine landscape and is often tolerated by residents in regions where the dominant religion is Tibetan Buddhism, including in Qomolangma NNR on the northern side of the Chinese Himalayas. Despite these positive attitudes, many decades of rapid economic development and population growth can cause increasing disturbance to the snow leopards, altering their habitat use patterns and ultimately impacting their conservation. We adopted a dynamic landscape ecology perspective and used multi-scale technique and occupancy model to better understand snow leopard habitat use and coexistence with humans in an 825 km2 communal landscape. We ranked eight hypothetical models containing potential natural and anthropogenic drivers of habitat use and compared them between summer and winter seasons within a year. HABITAT was the optimal model in winter, whereas ANTHROPOGENIC INFLUENCE was the top ranking in summer (AICcw≤2). Overall, model performance was better in the winter than in the summer, suggesting that perhaps some latent summer covariates were not measured. Among the individual variables, terrain ruggedness strongly affected snow leopard habitat use in the winter, but not in the summer. Univariate modeling suggested snow leopards prefer to use rugged land in winter with a broad scale (4000 m focal radius) but with a lesser scale in summer (30 m); Snow leopards preferred habitat with a slope of 22° at a scale of 1000 m throughout both seasons, which is possibly correlated with prey occurrence. Furthermore, all covariates mentioned above showed inextricable ties with human activities (presence of settlements and grazing intensity). Our findings show that multiple sources of anthropogenic activity have complex connections with snow leopard habitat use, even under low human density when anthropogenic activities are sparsely distributed across a vast landscape. This study is also valuable for habitat use research in the future, especially regarding covariate selection for finite sample sizes in inaccessible terrain. | ||||
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| Notes | Approved | no | |||
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SLN @ rakhee @ | Serial | 1698 | ||
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| Author | Xiao, C., Bai, D., Lambert, J. P., Li, Y., Cering, L., Gong, Z., Riordan, P., Shi, K. | ||||
| Title | How Snow Leopards Share the Same Landscape with Tibetan Agro-pastoral Communities in the Chinese Himalayas | Type | Journal Article | ||
| Year | 2022 | Publication | Journal of Resources and Ecology | Abbreviated Journal | |
| Volume | 13 | Issue | 3 | Pages | 483-500 |
| Keywords | habitat use; landscape ecology; occupancy model; Qomolangma; Panthera uncia | ||||
| Abstract | The snow leopard (Panthera uncia) inhabits a human-altered alpine landscape and is often tolerated by residents in regions where the dominant religion is Tibetan Buddhism, including in Qomolangma NNR on the northern side of the Chinese Himalayas. Despite these positive attitudes, many decades of rapid economic development and population growth can cause increasing disturbance to the snow leopards, altering their habitat use patterns and ultimately impacting their conservation. We adopted a dynamic landscape ecology perspective and used multi-scale technique and occupancy model to better understand snow leopard habitat use and coexistence with humans in an 825 km2 communal landscape. We ranked eight hypothetical models containing potential natural and anthropogenic drivers of habitat use and compared them between summer and winter seasons within a year. HABITAT was the optimal model in winter, whereas ANTHROPOGENIC INFLUENCE was the top ranking in summer (AICcw≤2). Overall, model performance was better in the winter than in the summer, suggesting that perhaps some latent summer covariates were not measured. Among the individual variables, terrain ruggedness strongly affected snow leopard habitat use in the winter, but not in the summer. Univariate modeling suggested snow leopards prefer to use rugged land in winter with a broad scale (4000 m focal radius) but with a lesser scale in summer (30 m); Snow leopards preferred habitat with a slope of 22° at a scale of 1000 m throughout both seasons, which is possibly correlated with prey occurrence. Furthermore, all covariates mentioned above showed inextricable ties with human activities (presence of settlements and grazing intensity). Our findings show that multiple sources of anthropogenic activity have complex connections with snow leopard habitat use, even under low human density when anthropogenic activities are sparsely distributed across a vast landscape. This study is also valuable for habitat use research in the future, especially regarding covariate selection for finite sample sizes in inaccessible terrain. | ||||
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| Notes | Approved | no | |||
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SLN @ rakhee @ | Serial | 1688 | ||
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| Author | Suryawanshi, K. R., Khanyari, M., Sharma, K., Lkhagvajav, P., Mishra, C. | ||||
| Title | Sampling bias in snow leopard population estimation studies | Type | Journal Article | ||
| Year | 2019 | Publication | Population Eccology | Abbreviated Journal | |
| Volume | Issue | Pages | 1-9 | ||
| Keywords | camera trap, Central Asia, Himalaya, meta-analysis, monitoring, Panthera uncia, population ecology | ||||
| Abstract | Accurate assessments of the status of threatened species and their conservation planning require reliable estimation of their global populations and robust monitoring of local population trends. We assessed the adequacy and suitability of studies in reliably estimating the global snow leopard (Panthera uncia) population. We compiled a dataset of all the peer-reviewed published literature on snow leopard population estimation. Metadata analysis showed estimates of snow leopard density to be a negative exponential function of area, suggesting that study areas have generally been too small for accurate density estimation, and sampling has often been biased towards the best habitats. Published studies are restricted to six of the 12 range countries, covering only 0.3�0.9% of the presumed global range of the species. Re-sampling of camera trap data from a relatively large study site (c.1684 km2) showed that small-sized study areas together with a bias towards good quality habitats in existing studies may have overestimated densities by up to five times. We conclude that current information is biased and inadequate for generating a reliable global population estimate of snow leopards. To develop a rigorous and useful baseline and to avoid pitfalls, there is an urgent need for (a) refinement of sampling and analytical protocols for population estimation of snow leopards (b) agreement and coordinated use of standardized sampling protocols amongst researchers and governments across the range, and (c) sampling larger and under-represented areas of the snow leopard's global range. |
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| Notes | Approved | no | |||
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SLN @ rakhee @ | Serial | 1477 | ||
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| Author | Sharma, K. | ||||
| Title | The mysterious irbis | Type | Magazine Article | ||
| Year | 2008 | Publication | Sanctuary Asia | Abbreviated Journal | |
| Volume | 28 | Issue | 6 | Pages | 52-57 |
| Keywords | Mongolia, Snow Leopard Conservation Fund, Panthera, Snow Leopard Trust, long-term, ecology, Tost, snow leopard | ||||
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| Language | English | Summary Language | Original Title | ||
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| Notes | Approved | no | |||
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SLN @ rana @ | Serial | 1300 | ||
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| Author | McCarthy, T.; Murray, K.; Sharma, K.; Johansson, O. | ||||
| Title | Preliminary results of a long-term study of snow leopards in South Gobi, Mongolia | Type | Journal Article | ||
| Year | 2010 | Publication | Cat News | Abbreviated Journal | |
| Volume | Autumn | Issue | 53 | Pages | 15-19 |
| Keywords | snow leopard, Mongolia, monitor, population, Panthera, Snow Leopard Trust, Snow Leopard Conservation Fund, South Gobi, ecology, radio collar, GPS-satellite collar, home range, camera trapping, fecal genetics, occupancy modeling | ||||
| Abstract | Snow leopards Panthera uncia are under threat across their range and require urgent conservation actions based on sound science. However, their remote habitat and cryptic nature make them inherently difficult to study and past attempts have provided insufficient information upon which to base effective conservation. Further, there has been no statistically-reliable and cost-effective method available to monitor snow leopard populations, focus conservation effort on key populations, or assess conservation impacts. To address these multiple information needs, Panthera, Snow Leopard Trust, and Snow Leopard Conservation Fund, launched an ambitious long-term study in Mongolia’s South Gobi province in 2008. To date, 10 snow leo-pards have been fitted with GPS-satellite collars to provide information on basic snow leopard ecology. Using 2,443 locations we calculated MCP home ranges of 150 – 938 km2, with substantial overlap between individuals. Exploratory movements outside typical snow leopard habitat have been observed. Trials of camera trapping, fecal genetics, and occupancy modeling, have been completed. Each method ex-hibits promise, and limitations, as potential monitoring tools for this elusive species. | ||||
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| Notes | Approved | no | |||
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SLN @ rana @ | Serial | 1151 | ||
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| Author | Sharma, S., Thapa, K., Chalise, M., Dutta, T., Bhatnagar, Y.V., McCarthy, T. | ||||
| Title | The snow leopard in Himalaya: A step towards their conservation by studying their distribution, marking habitat selection, coexistence with other predators, and wild prey-livestock-predator interaction | Type | Journal Article | ||
| Year | 2006 | Publication | Conservation Biology in Asia | Abbreviated Journal | |
| Volume | Issue | Pages | 184-196 | ||
| Keywords | Himalaya, Nepal, ecology, snow leopard, Uncia uncia, prey, livestock, predator | ||||
| Abstract | Snow leopard (Uncia uncial) is a flagship species of the Himalaya. Very few studies have been done on the ecology of this species in the Himalaya. This paper presents an overview of four studies conducted on snow leopards in Nepal and India, dealing with various aspects of snow leopard ecology including their status assessment, making behaviour, habitat selection, food habits, and impact on livestock. The information generated by these studies is useful in planning effective conservation and management strategies for this endangered top predator of high mountains. | ||||
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| Notes | Paper 12; From: Pages 184-196 of Conservation Biology in Asia (2006) McNeely, J.A., T. M. McCarthy, A. Smith, L.Olsvig-Whittaker, and E.D. Wikramanayake (editors). Published by the Society for Conservation Biology Asia Section and Resources Himalaya, Kathmandu, Nepal, 455 pp. | Approved | no | ||
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SLN @ rana @ | Serial | 1130 | ||
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| Author | McCarthy, T.; Khan, J.; Ud-Din, J.; McCarthy, K. | ||||
| Title | First study of snow leopards using GPS-satellite collars underway in Pakistan | Type | Journal Article | ||
| Year | 2007 | Publication | Cat News | Abbreviated Journal | |
| Volume | 46 | Issue | Spring | Pages | 22-23 |
| Keywords | study; snow; snow leopards; snow leopard; snow-leopards; snow-leopard; leopards; leopard; using; collars; collar; Pakistan; uncia; Uncia uncia; Uncia-uncia; habitat; Cats; cat; sound; knowledge; ecology; behavior; conserve; information; radio; radio collars; radio collar; radio-collars; radio-collar; Nepal; 1980; Mongolia; 1990; Gps; Report; Data; Satellite | ||||
| Abstract | Snow leopards (Uncia uncia) are highly cryptic and occupy remote inaccessible habitat, making studying the cats difficult in the extreme. Yet sound knowledge of the cat's ecology, behavior and habitat needs is required to intelligently conserve them. This information is lacking for snow leopards, and until recently so was the means to fill that knowledge gap. Two long-term studies of snow leopards using VHF radio collars have been undertaken in Nepal (1980s) and Mongolia (1990s) but logistical and technological constraints made the findings of both studies equivocal. Technological advances in the interim, such as GPS collars which report data via satellite, make studies of snow leopards more promising, at least in theory. | ||||
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| Notes | Approved | no | |||
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SLN @ rana @ 1009 | Serial | 666 | ||
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| Author | Vashetko, E.; Esipov A.; Bykova, E.; Kreuzberg, E. | ||||
| Title | Snow Leopard Bibliography. Central Asia (Abstracts) | Type | Manuscript | ||
| Year | 2005 | Publication | Abbreviated Journal | ||
| Volume | Issue | Pages | |||
| Keywords | analysis; asia; bibliography; central; Central Asia; conservation; ecology; International; International-Snow-Leopard-Trust; international snow leopard trust; Islt; leopard; project; region; Russian; snow; snow-leopard; snow leopard; species; trust; work | ||||
| Abstract | Bibliography of the Snow Leopard included publications on the studying various questions of ecology and conservation of the Snow Leopard in Central Asia (305) for the period 1873 to 2004. The most important works on this species in the region, as well as results of the analysis of timing of publications was described. | ||||
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| Notes | English version. Also available in Russian in the SLN bibliography. Project supported by International Snow Leopard Trust (ISLT), was carried out in 2004-2005. | Approved | no | ||
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SLN @ rana @ 1061 | Serial | 983 | ||
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| Author | Dyikanova, C. | ||||
| Title | A public awareness outreach programme on Snow Leopards for the Kyrgyz Republic, Final Report | Type | Report | ||
| Year | 2004 | Publication | Abbreviated Journal | ||
| Volume | Issue | Pages | 1-4 | ||
| Keywords | project; awareness; local; local people; people; staff; Base; snow; snow leopard; snow-leopard; leopard; conservation; ecology; threats; threat; Kyrgyzstan; regional; areas; area; public; snow leopards; snow-leopards; leopards; Kyrgyz; Kyrgyz-Republic; republic; Report; International; international snow leopard trust; International-Snow-Leopard-Trust; trust; program; community | ||||
| Abstract | The principle goal of the project was to raise awareness of local people, staff of frontier posts, customs and foreign military base on snow leopard, and its conservation. In the framework of the project the following steps were to be executed: A) To disseminate printing materials: a booklet, poster, card and calendar. b) To publish articles on snow leopard ecology and conservation issues and threats in Kyrgyzstan regional newspapers (Issyk-Kul, Osh, and Chui areas) C) To hold follow-up meeting with target groups D) To evaluate project results |
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| Notes | Project funded by International Snow Leopard Trust Small Grants Program. Community and Business Forum, Bishkek, Kyrgyzstan. | Approved | no | ||
| Call Number |
SLN @ rana @ 1066 | Serial | 248 | ||
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