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Author |
Blomqvist, L. |
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Title |
The global snow leopard population in captivity 2001 |
Type |
Miscellaneous |
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Year |
2003 |
Publication |
International Pedigree Book of Snow Leopards |
Abbreviated Journal |
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8 |
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Pages |
21-24 |
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Keywords ![sorted by Keywords field, descending order (down)](img/sort_desc.gif) |
captivity; global; population; snow leopard |
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no |
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Call Number |
SLN @ rana @ 919 |
Serial |
171 |
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Author |
Blomqvist, L. |
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Title |
The 1981 annual report of the captive snow leopards (Panthera uncia) population |
Type |
Report |
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Year |
1982 |
Publication |
International Pedigree Book of Snow Leopards |
Abbreviated Journal |
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Pages |
41-47 |
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Keywords ![sorted by Keywords field, descending order (down)](img/sort_desc.gif) |
captive; Panthera-uncia; panthera uncia; pedigree; population; snow leopard |
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Series Title |
International Pedigree Book of Snow Leopards |
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3 |
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no |
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Call Number |
SLN @ rana @ 956 |
Serial |
155 |
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Author |
Blomqvist, L. |
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Title |
The 1978 register for the captive population of snow leopards, Panthera uncia |
Type |
Journal Article |
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Year |
1979 |
Publication |
International Zoo News |
Abbreviated Journal |
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Volume |
26 |
Issue |
7-8 |
Pages |
17-23 |
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Keywords ![sorted by Keywords field, descending order (down)](img/sort_desc.gif) |
captive; captive-population; Panthera-uncia; panthera uncia; population; snow leopard |
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no |
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Call Number |
SLN @ rana @ 955 |
Serial |
147 |
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Author |
Blomqvist, L. |
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Title |
The 1979 world register for the captive population of snow leopards, Panthera uncia |
Type |
Book Chapter |
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Year |
1980 |
Publication |
International Pedigree Book of Snow Leopards |
Abbreviated Journal |
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Pages |
62-75 |
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Keywords ![sorted by Keywords field, descending order (down)](img/sort_desc.gif) |
captive; captive-population; panthera uncia; snow leopard |
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Helsinki Zoo |
Place of Publication |
Helsinki |
Editor |
Blomqvist, L. |
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no |
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Call Number |
SLN @ rana @ 997 |
Serial |
150 |
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Author |
Freeman, H. |
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Title |
The snow leopard, today and yesterday |
Type |
Book Chapter |
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Year |
1980 |
Publication |
International Pedigree Book of Snow Leopards, Vol. 2 |
Abbreviated Journal |
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Volume |
2 |
Issue |
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Pages |
37-43 |
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Keywords ![sorted by Keywords field, descending order (down)](img/sort_desc.gif) |
captive; captive populations; captivity; International; pedigree; snow-leopard; snow-leopards; snow leopard; snow leopards; zoo |
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Helsinki Zoo |
Place of Publication |
Helsinki |
Editor |
Blomqvist, L. |
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no |
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Call Number |
SLN @ rana @ 1049 |
Serial |
316 |
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Author |
Durbach, I., Borchers, D., Sutherland, C., Sharma, K. |
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Title |
Fast, flexible alternatives to regular grid designs for spatial
capture–recapture. |
Type |
Research Article |
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Year |
2020 |
Publication |
Methods in Ecology and Evolution |
Abbreviated Journal |
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Pages |
1-13 |
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Keywords ![sorted by Keywords field, descending order (down)](img/sort_desc.gif) |
camera trap, population ecology,sampling, spatial capture-recapture, surveys |
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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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no |
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Call Number |
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Serial |
1618 |
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Author |
Suryawanshi, K. R., Khanyari, M., Sharma, K., Lkhagvajav, P., Mishra, C. |
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Title |
Sampling bias in snow leopard population estimation studies |
Type |
Journal Article |
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Year |
2019 |
Publication |
Population Eccology |
Abbreviated Journal |
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Volume |
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Pages |
1-9 |
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Keywords ![sorted by Keywords field, descending order (down)](img/sort_desc.gif) |
camera trap, Central Asia, Himalaya, meta-analysis, monitoring, Panthera uncia, population ecology |
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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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Call Number |
SLN @ rakhee @ |
Serial |
1477 |
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Permanent link to this record |
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Author |
Suryawanshi, K.R.; Bhatnagar, Y.; Mishra, C. |
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Title |
Why should a grazer browse? Livestock impact on winter resource use by bharal Pseudois nayaur
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Journal Article |
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2009 |
Publication |
Oecologia |
Abbreviated Journal |
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Pages |
1-10 |
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Keywords ![sorted by Keywords field, descending order (down)](img/sort_desc.gif) |
browse; livestock; impact; winter; resource; use; bharal; Pseudois; pseudois nayaur; Pseudois-nayaur; nayaur; diet; variation; diets; conservation; Media; study; decline; areas; area; grazing; Pressure; plants; plant; sign; feeding; location; population; structure; populations; using; young; Female; times; High; Competition; species; predators; predator; endangered; snow; snow leopard; snow-leopard; leopard; trans-himalaya; transhimalaya |
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Many mammalian herbivores show a temporal diet variation between graminoid-dominated and browse dominated diets. We determined the causes of such a diet shift and its implications for conservation of a medium sized ungulate-the bharal Pseudois nayaur. Past studies show that the bharal diet is dominated by graminoids (>80%) during summer, but the contribution of graminoids declines to about 50% in winter. We tested the predictions generated by two alternative hypotheses explaining the decline: low graminoid availability during winter causes bharal to include browse in their diet; bharal include browse, with relatively higher nutritional quality, in their diet to compensate for the poor quality of graminoids during winter. We measured winter graminoid availability in areas with no livestock grazing, areas with relatively moderate livestock grazing, and those with intense livestock grazing pressures. The chemical composition of plants contributing to the bharal diet was analysed. The bharal diet was quantiWed through signs of feeding on vegetation at feeding locations. Population structures of bharal populations were recorded using a total count method. Graminoid availability was highest in areas without livestock grazing, followed by areas with moderate and intense livestock grazing. The bharal diet was dominated by graminoids (73%) in areas with highest graminoid availability. Graminoid contribution to the bharal diet declined monotonically (50, 36%) with a decline in graminoid availability. Bharal young to female ratio was 3 times higher in areas with high graminoid availability than areas with low graminoid availability. The composition of the bharal winter diet was governed predominantly by the availability of graminoids in the rangelands. Our results suggest that bharal include more browse in their diet during winter due to competition from livestock for graminoids. Since livestock grazing reduces graminoid availability, creation of livestock-free areas is necessary for the conservation of grazing species such as the bharal and its predators including the endangered snow leopard in the Trans-Himalaya. |
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Springer-Verlag |
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Online |
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This study was made possible by a grant from the Snow Leopard Network. Additional support was given by the Wildlife Conservation Society-India Program and Nature Conservation Foundation, the Whitley Fund for Nature, the Ford Foundation, and the Nadathur Conservation Trust. |
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Call Number |
SLN @ rana @ 1062 |
Serial |
951 |
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Author |
Fox, J.L.; Jackson, R.M. |
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Title |
Blue Sheep and Snow Leopards in Bhutan and Trans-Himalayan Nepal: Recent Status Evaluations and Their Application to Research and Conservation |
Type |
Conference Article |
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2002 |
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blue; sheep; Nepal; snow; leopard; status; Himalaya; Himalayan; Bhutan; population; indices; conservation; monitoring; 4930 |
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Islt |
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abstract onlyTitle, Monographic: Proceedings of the Snow Leopard Survival SummitPlace of Meeting: Seattle,WA |
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SLN @ rana @ 479 |
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311 |
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Author |
Ming, M. |
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Title |
Camera trapping on snow leopards in the Muzat Valley, Reserve, Xinjiang, P.R. China (October-December 2005) |
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Report |
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2006 |
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Abbreviated Journal |
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1-5 |
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Keywords ![sorted by Keywords field, descending order (down)](img/sort_desc.gif) |
behavior; camera trapping; China; feces; ibex; infrared trapping cameras; livestock; population size; snow leopard; Tomur; transect; Xinjiang |
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Abstract |
The main purpose of this work was to study the use of infrared trapping cameras to estimate Snow Leopard population size in a specific study area. This is the first time a study of this nature has taken place in China. During 71 days of field work, a total of 36 cameras were set up in Muzat Valley adjacent to the Tomur Nature Reserve in Xinjiang Province. We expended approximately 2094 trap days total. At least 32 pictures of Snow Leopards, 22 pictures of other wild species and 72 pictures of livestock were taken in the Muzat Valley. Meanwhile, 20 transects were run and 31 feces sample were collected. We also observed the behavior of ibex for 77.3 hours and found a total of approximately 264 ibexes in the research area. |
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Call Number |
SLN @ rana @ 970 |
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682 |
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