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Author |
Atzeni, L., Cushman, S. A., Bai, D., Wang, J., Chen, P., Shi,
K., Riordan, P. |
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Title |
Meta-replication, sampling bias, and multi-scale model selection:
A case study on snow leopard (Panthera uncia) in western China. |
Type |
Journal Article |
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Year |
2020 |
Publication |
Ecology and Evolution |
Abbreviated Journal |
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1-27 |
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Keywords |
MaxEnt, meta-replication, multi-scale, Panthera uncia, sampling bias, scale selection, snow leopard, species distribution model |
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Abstract |
Replicated multiple scale species distribution models (SDMs)
have become increasingly important to identify the correct variables
determining species distribution and their influences on ecological
responses. This study explores multi-scale habitat relationships of the
snow leopard (Panthera uncia) in two study areas on the Qinghai–Tibetan
Plateau of western China. Our primary objectives were to evaluate the
degree to which snow leopard habitat relationships, expressed by
predictors, scales of response, and magnitude of effects, were
consistent across study areas or locally landcape-specific. We coupled
univariate scale optimization and the maximum entropy algorithm to
produce multivariate SDMs, inferring the relative suitability for the
species by ensembling top performing models. We optimized the SDMs based
on average omission rate across the top models and ensembles’ overlap
with a simulated reference model. Comparison of SDMs in the two study
areas highlighted landscape-specific responses to limiting factors.
These were dependent on the effects of the hydrological network,
anthropogenic features, topographic complexity, and the heterogeneity of
the landcover patch mosaic. Overall, even accounting for specific local
differences, we found general landscape attributes associated with snow
leopard ecological requirements, consisting of a positive association
with uplands and ridges, aggregated low-contrast landscapes, and large
extents of grassy and herbaceous vegetation. As a means to evaluate the
performance of two bias correction methods, we explored their effects on
three datasets showing a range of bias intensities. The performance of
corrections depends on the bias intensity; however, density kernels
offered a reliable correction strategy under all circumstances. This
study reveals the multi-scale response of snow leopards to environmental
attributes and confirms the role of meta-replicated study designs for
the identification of spatially varying limiting factors. Furthermore,
this study makes important contributions to the ongoing discussion about
the best approaches for sampling bias correction. |
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1616 |
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Author |
Kazensky, C.A.; Munson, L.; Seal, U.S. |
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Title |
The effects of melengestrol acetate on the ovaries of captive wild felids |
Type |
Journal Article |
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Year |
1998 |
Publication |
Journal-of-Zoo-and-Wildlife-Medicine |
Abbreviated Journal |
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29 |
Issue |
1 |
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1-5 |
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Keywords |
Mga; zoo; felids; contraception; Melengestrol-acetate; ovaries; snow-leopard; Panthera-uncia; snow leopard; browse; uncia; panthera; melengestrol; acetate; 1260; effects; study; ovarian; Ovary; captive; wild; wild felid; Wild-Felid; species; Follicle; Cats; cat; recent; Ovulation; doses; Dose; action; Progestin; Disease; veterinary |
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Abstract |
Melengestrol acetate (MGA) is the most widely used contraceptive in zoo felids, but the mechanism of contraception and the pathologic effects have not been investigated. For this study, the effects of MGA on folliculogenesis were assessed, and the association of MGA with ovarian lesions was evaluated. Comparisons were made among the histopathologic findings in the ovaries from 88 captive wild felids (representing 15 species) divided into three groups: 37 currently contracepted with MGA, eight previously exposed to MGA, and 43 never contracepted. Ninety-one percent of the felids evaluated had tertiary follicles, and no differences were noted between contracepted and uncontracepted cats. Some MGA-contracepted cats also had corpora lutea indicating recent ovulation. These results indicate that folliculogenesis is not suppressed by current doses of MGA and ovulation occurred in some cats. Therefore, the contraceptive actions of MGA do not occur by suppressing folliculogenesis, and MGA-contracepted felids likely have endogenous estrogens that may confound progestin effects on the uterus. Cystic rete ovarii was the most common pathologic finding, but they were not more prevalent in MGA-contracepted cats. These findings indicate that MGA is not associated with ovarian disease, including ovarian cancer, in contrast to the uterine lesions noted in MGA-treated cats. |
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Document Type: English. Affiliation: Taylor Veterinary Hospital, Turlock , California 95382, USA |
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Call Number |
SLN @ rana @ 348 |
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527 |
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Author |
Janecka, J. E., Jackson, R., Munkhtsog, B., Murphy, W. J. |
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Title |
Characterization of 9 microsatellites and primers in snow leopards and a species-specific PCR assay for identifying noninvasive samples |
Type |
Journal Article |
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Year |
2014 |
Publication |
Conservation Genetic Resource |
Abbreviated Journal |
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6 |
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2 |
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369:373 |
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Microsatellites,Cytochrome b, Snow Leopard, Noninvasive genetics, Individual identification |
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Abstract |
Molecular markers that can effectively identify noninvasively collected samples and provide genetic
information are critical for understanding the distribution, status, and ecology of snow leopards (Panthera uncia). However, the low DNA quantity and quality in many
noninvasive samples such as scats makes PCR amplification and genotyping challenging. We therefore designed primers for 9 microsatellites loci previously isolated in the
domestic cat (Felis catus) specifically for snow leopard studies using noninvasive samples. The loci showed moderate levels of variation in two Mongolian snow leopard
populations. Combined with seven other loci that we previously described, they have sufficient variation (He = 0.504, An = 3.6) for individual identification and
population structure analysis. We designed a species species specific PCR assay using cytochrome b for identification of unknown snow leopard samples. These molecular markers
facilitate in depth studies to assess distribution, abundance, population structure, and landscape connectivity of this endangered species.
endangered species |
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Call Number |
SLN @ rakhee @ |
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1427 |
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Author |
Janecka, J. E., Jackson, R., Munkhtsog, B., Murphy, W. J. |
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Title |
Characterization of 9 microsatellites and primers in snow leopards and a species-specific PCR assay for identifying noninvasive samples |
Type |
Journal Article |
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2014 |
Publication |
Conservation Genetic Resource |
Abbreviated Journal |
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6 |
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2 |
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369:373 |
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Keywords |
Microsatellites,Cytochrome b, Snow Leopard, Noninvasive genetics, Individual identification |
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Abstract |
Molecular markers that can effectively identify noninvasively collected samples and provide genetic
information are critical for understanding the distribution, status, and ecology of snow leopards (Panthera uncia). However, the low DNA quantity and quality in many
noninvasive samples such as scats makes PCR amplification and genotyping challenging. We therefore designed primers for 9 microsatellites loci previously isolated in the
domestic cat (Felis catus) specifically for snow leopard studies using noninvasive samples. The loci showed moderate levels of variation in two Mongolian snow leopard
populations. Combined with seven other loci that we previously described, they have sufficient variation (He = 0.504, An = 3.6) for individual identification and
population structure analysis. We designed a species species specific PCR assay using cytochrome b for identification of unknown snow leopard samples. These molecular markers
facilitate in depth studies to assess distribution, abundance, population structure, and landscape connectivity of this endangered species. |
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SLN @ rakhee @ |
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1428 |
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Author |
Bannikov A.G. |
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Title |
Mountains of Middle Asia and Kazakhstan |
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Miscellaneous |
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1966 |
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222-223 |
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Middle Asia; Kazakhstan; nature reserves; plants; Animals; snow leopard; preys.; 6130 |
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The data on geographical location, plants and animals of mountain nature reserves of Middle Asia and Kazakhstan are given. Snow leopard and its preys (wild ibexes and sheep) were recorded in both Almaty and Aksu Jabagly nature reserves. |
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Full text available in RussianJournal Title: Visiting of Soviet Union nature reserves. |
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SLN @ rana @ 591 |
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112 |
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Author |
Bobrinskiy N.A. |
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Mountains of Central Asia |
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Miscellaneous |
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1967 |
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296-321 |
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Middle Asia; mountain; tien shan; Pamir; Hissar ridge; Turkestan ridge; Kopet-Dag ridge; Animals; plants; Issyk-Kul lake; Sary-Chelek; spiders; birds; lizards; marmots; wild sheep; ibex; snow leopard.; 6330; Russian |
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It provides a zoogeographical description of Central Asia mountains: Tien Shan (west and east), Pamir, the Turkestan and Hissar ridges, and ruinous mountains in Kyzylkum. Distribution of various animal species over the area under study is described. Data concerning Central Asia sheep, ibex, and snow leopard in the alpine meadow zone, and data concerning the otter (in the Tupalang river basin) and grey partridge is presented. The author noted that generally fauna of Tien Shan, Hissar, and Pamir is similar to that of Inner Asia. The other type of fauna more similar to that of Transcaucasia is typical for Kopet-Dag. |
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Full text available in RussianJournal Title: Fauna and nature of the USSR. |
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SLN @ rana @ 611 |
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180 |
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Formozov A.N. |
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Seasonal migrations of mammals due to snow cover. Distribution of the Felidae family species |
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Miscellaneous |
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1990 |
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83-84 |
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Migration; ungulates; carnivores; snow leopard.; 6740; Russian |
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It describes vertical migrations of ungulates (ibex, wild sheep) in the Semerechie, Altai, Sayans, Tuva, seasonal migrations of steppe ungulates (kulan and saiga), and migrations of predators (lynx, leopard, irbis, tiger, dhole, wolf, glutton) following ungulates during winters with thick snow cover. Shorter local migrations related to uneven snow cover are typical for corsac, fox, and wolf. An analysis of the Felidae family species distribution showed that northern border of the cat family species habitat is connected with borders of 20 30 cm thick snow cover rather than with landscape contours or typical habitats. With the exception of lynx, this can be referred to the large cat family species such as irbis, leopard, and tiger. |
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Full text available in RussianJournal Title: Snow cover in life of mammals and birds. |
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SLN @ rana @ 652 |
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283 |
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Author |
Yondon, O. |
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Title |
Long-Term Conservation of Argali and Snow Leopard in the Trans-Boundary Areas of the Altai-Sayan Ecoregion between Mongolia and Russia (Second Phase) |
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Report |
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2010 |
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1-6 |
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Mongolia, Russia, argali, snow leopard, Altai-Sayan |
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Objective 1: To ensure long-term conservation of Argali and Snow leopard in the selected areas through proactive involvement of local communities and local organisations.
Objective 2. Facilitate establishing new PA in priority areas (critical habitat and migration corridors) of Argali and Snow leopard, which includes also trans-boundary PA’s |
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WWF Mongolia |
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WWF Mongolia |
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Mongolia |
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English |
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Half-year (6 month) report |
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SLN @ rana @ |
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1106 |
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Author |
Sharma, K. |
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Title |
The mysterious irbis |
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Magazine Article |
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2008 |
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Sanctuary Asia |
Abbreviated Journal |
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28 |
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6 |
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52-57 |
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Keywords |
Mongolia, Snow Leopard Conservation Fund, Panthera, Snow Leopard Trust, long-term, ecology, Tost, snow leopard |
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1300 |
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Author |
Richardson, N. |
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Title |
The snow leopard: ghost of the mountains |
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2010 |
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The telegraph |
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16 Dec 2010 |
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Mongolia, Snow Leopard Trust, Panthera, snow leopard, research |
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Snow leopards face the threats of poaching, habitat loss and diminishing prey. In remotest Mongolia, a research team is keeping tabs on this iconic and elusive species. |
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http://www.telegraph.co.uk/earth/wildlife/8207266/The-snow-leopard-ghost-of-the-mountains.html |
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1292 |
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