|
Records |
Links |
|
Author |
Ale, S.; Brown, J. |
|
|
Title |
The contingencies of group size and vigilance |
Type |
Miscellaneous |
|
Year |
2007 |
Publication |
Evolutionary Ecology Research, |
Abbreviated Journal |
|
|
|
Volume |
9 |
Issue |
|
Pages |
1263-1276 |
|
|
Keywords ![sorted by Keywords field, ascending order (up)](img/sort_asc.gif) |
attraction effect,contingency,dilution effect,fitness,group-size effect,many-eyes effect,predation risk,vigilance behaviour; predation; decline; potential; predators; predator; feeding; Animals; Animal; use; food; effects; Relationship; behaviour; methods; game; Interactions; interaction; factor; value; Energy |
|
|
Abstract |
Background: Predation risk declines non-linearly with one's own vigilance and the vigilance of others in the group (the 'many-eyes' effect). Furthermore, as group size increases, the individual's risk of predation may decline through dilution with more potential victims, but may increase if larger groups attract more predators. These are known, respectively, as the dilution effect and the attraction effect.
Assumptions: Feeding animals use vigilance to trade-off food and safety. Net feeding rate declines linearly with vigilance.
Question: How do the many-eyes, dilution, and attraction effects interact to influence the relationship between group size and vigilance behaviour?
Mathematical methods: We use game theory and the fitness-generating function to determine the ESS level of vigilance of an individual within a group.
Predictions: Vigilance decreases with group size as a consequence of the many-eyes and dilution effects but increases with group size as a consequence of the attraction effect, when they act independent of each other. Their synergetic effects on vigilance depend upon the relative strengths of each and their interactions. Regardless, the influence of other factors on vigilance – such as encounter rate with predators, predator lethality, marginal value of energy, and value of vigilance – decline with group size. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
English |
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
SLN @ rana @ 886 |
Serial |
53 |
|
Permanent link to this record |
|
|
|
|
Author |
Johansson, Torbjorn, A. Johansson, Orjan. McCarthy, Tom |
|
|
Title |
An Automatic VHF Transmitter Monitoring System for Wildlife Research |
Type |
Journal Article |
|
Year |
2011 |
Publication |
Wildlife Society Bulletin |
Abbreviated Journal |
|
|
|
Volume |
9999 |
Issue |
|
Pages |
1-5 |
|
|
Keywords ![sorted by Keywords field, ascending order (up)](img/sort_asc.gif) |
automatic system, monitoring, pulse detection, trap-site transmitter, VHF transmitter monitoring |
|
|
Abstract |
We describe an automated system for monitoring multiple very high frequency (VHF) transmitters, which are commonly employed in wildlife studies. The system consists of a microprocessor-controlled radio-frequency monitor equipped with advanced signal-processing capabilities that communicates with, and relays information to, a user interface unit at a different location. the system was designed for a capture-and-release snow leopard (Panthera uncia) study in Mongolia, where checking trap-site transmitters manually entailed climbing a hill with telemetry equipment several times each day and night. Here, it monitors the trap-site transmitters and actively produces an alarm when any of the traps have been triggered, or if the system has lost contact with any trap-transmitter. The automated system allowed us to constantly monitor transmitters from a research camp, and alerted us each time a trap was triggered. The system has been field-tested for 83 days from mid-September 2010 to mid-december 2010 in the Tost mountain range on the edge of Mongolia's Gobi desert. During this time, the system performed reliably, responding correctly to 45 manually generated alarms and 9 animal captures. The system considerably shortens the time the captured animals spend in traps, and also mitigates the need for manual trap-site transmitter monitoring, greatly reducing risk to the animal and the human effort involved. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
SLN @ rakhee @ |
Serial |
1379 |
|
Permanent link to this record |
|
|
|
|
Author |
Wahlberg, C. |
|
|
Title |
Autopsy findings and causes of death in captive snow leopards (Panthera uncia): a preliminary report |
Type |
Book Chapter |
|
Year |
1980 |
Publication |
International Pedigree Book of Snow Leopards |
Abbreviated Journal |
|
|
|
Volume |
2 |
Issue |
|
Pages |
205-217 |
|
|
Keywords ![sorted by Keywords field, ascending order (up)](img/sort_asc.gif) |
Autopsy; Death; captive; snow; snow leopards; snow leopard; snow-leopards; snow-leopard; leopards; leopard; panthera; panthera uncia; Panthera-uncia; uncia; Report; International; pedigree |
|
|
Abstract |
|
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
Helsinki Zoo |
Place of Publication |
Helsinki |
Editor |
Blomqvist, L. |
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
SLN @ rana @ 1095 |
Serial |
998 |
|
Permanent link to this record |
|
|
|
|
Author |
Franchini, M., Atzeni, L., Lovari, S., Nasanbat, B., Ravchig, S., Herrador, F. C., Bombieri, G., Augugliaro, C. |
|
|
Title |
Spatio-temporal behaviour of predators and prey in an arid environment of Central Asia |
Type |
Journal Article |
|
Year |
2022 |
Publication |
Current Zoology |
Abbreviated Journal |
|
|
|
Volume |
|
Issue |
zoac093 |
Pages |
|
|
|
Keywords ![sorted by Keywords field, ascending order (up)](img/sort_asc.gif) |
avoidance, facilitation, Mongolia, Panthera uncia, ungulates, Vulpes vulpes. |
|
|
Abstract |
The mechanisms of interactions between apex and smaller carnivores may range from competition to facilitation. Conversely, interactions between predators and prey are mainly driven by the prey reducing the likelihood of encounters with predators. In this study, we investigated (i) the spatio-temporal interactions between an apex (the snow leopard) and a meso-predator (the red fox), and (ii) the temporal interactions between the snow leopard and its potential prey (Siberian ibex, argali, Asian wild ass, Tolai hare) through camera-trapping in the Mongolian Great Gobi-A. The probability of occurrence for the red fox was higher in presence of the snow leopard than in its absence. Moreover, the red fox activity pattern matched that of the snow leopard, with both species mostly active at sunset. This positive spatio-temporal interaction suggests that the presence of the snow leopard may be beneficial for the red fox in terms of scavenging opportunities. However, other explanations may also be possible. Amongst prey, the Siberian ibex and the argali were mainly active during the day, whereas the Asian wild ass and the Tolai hare were more nocturnal. These findings suggest that potential prey (especially the Siberian ibex and the argali) may shape their behaviour to decrease the opportunity of encounters with the snow leopard. Our results have revealed complex interactions between apex and smaller predators and between apex predator and its potential prey. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
SLN @ rakhee @ |
Serial |
1706 |
|
Permanent link to this record |
|
|
|
|
Author |
Anonymous |
|
|
Title |
A snow leopard conservation plan for Mongolia |
Type |
Report |
|
Year |
2000 |
Publication |
|
Abbreviated Journal |
|
|
|
Volume |
|
Issue |
|
Pages |
1-8 |
|
|
Keywords ![sorted by Keywords field, ascending order (up)](img/sort_asc.gif) |
awareness; behaviour; biodiversity; conservation plan; decline; density; ecology; fund-raising; funding; habitat degradation; Himalayan; management; Mongolia; montane; pastoralists; pelt; predator; snow-leopard-conservation-plan; snow leopard; trade; Wwf |
|
|
Abstract |
The snow leopard faces multiple threats in the Himalayan region, from habitat degradation, loss of prey, the trade in pelts, parts and live animals, and conflict with humans, primarily pastoralists. Consequently, the populations are considered to be in decline and the species is listed as Endangered in the IUCN's Red List. As a 'flagship' and 'umbrella' species the snow leopard can be a unifying biological feature to raise awareness of its plight and the need for conservation, which will benefit other facets of Himalayan biodiversity as well. Some studies of snow leopards have been conducted in the Himalayan region. But, because of its elusive nature and preference for remote and inaccessible habitat, knowledge of the ecology and behaviour of this mystical montane predator is scant. The available information, however, suggests that snow leopards occur at low densities and large areas of habitat are required to conserve a viable population. Thus, many researchers and conservationists have advocated landscape-scale approaches to conservation within a regional context, rather than focusing on individual protected areas.This regional strategy for WWF's snow leopard conservation program is built on such an approach. The following were identified as important regional issues: 1) international trade in snow leopards and parts; 2) the human-snow leopard conflict; 3) the need for a landscape approach to conservation to provide large spatial areas that can support demographically and ecologically viable snow leopard metapopulations; 4) research on snow leopard ecology to develop long-term, science-based conservation management plans; and 5) regional coordination and dialog. While the issues are regional, the WWF's in the region have developed 5-year strategic actions and activities, using the regional strategies as a touchstone, which will be implemented at national levels. The WWF's will develop proposals based on these strategic actions, with estimated budgets, for use by the network for funding and fund-raising. WWF also recognizes the need to collaborate and coordinate within the network and with other organizations in the region to achieve conservation goals in an efficient manner, and will form a working group to coordinate activities and monitor progress. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
Publication date unknown but must be at least from 2000. |
Approved |
no |
|
|
Call Number |
SLN @ rana @ 995 |
Serial |
92 |
|
Permanent link to this record |
|
|
|
|
Author |
Bohnett, E., Holmberg, J., Faryabi, S. P., An, L., Ahmad, B., Rashid, W., Ostrowski, S. |
|
|
Title |
Comparison of two individual identification algorithms for snow leopards (Panthera uncia) after automated detection |
Type |
Journal Article |
|
Year |
2023 |
Publication |
Ecological Informatics |
Abbreviated Journal |
|
|
|
Volume |
77 |
Issue |
102214 |
Pages |
1-14 |
|
|
Keywords ![sorted by Keywords field, ascending order (up)](img/sort_asc.gif) |
Background subtraction, Deep learning, Hotspotter, Individual identification, PIE v2, Snow leopards |
|
|
Abstract |
Photo-identification of individual snow leopards (Panthera uncia) is the primary data source for density estimation via capture-recapture statistical methods. To identify individual snow leopards in camera trap imagery, it is necessary to match individuals from a large number of images from multiple cameras and historical catalogues, which is both time-consuming and costly. The camouflaged snow leopards also make it difficult for machine learning to classify photos, as they blend in so well with the surrounding mountain environment, rendering applicable software solutions unavailable for the species. To potentially make snow leopard individual identification available via an artificial intelligence (AI) software interface, we first trained and evaluated image classification techniques for a convolutional neural network, pose invariant embeddings (PIE) (a triplet loss network), and compared the accuracy of PIE to that of the HotSpotter algorithm (a SIFT-based algorithm). Data were acquired from a curated library of free-ranging snow leopards taken in Afghanistan between 2012 and 2019 and from captive animals in zoos in Finland, Sweden, Germany, and the United States. We discovered several flaws in the initial PIE model, such as a small amount of background matching, that was addressed, albeit likely not fixed, using background subtraction (BGS) and left-right mirroring (LR) techniques which demonstrated reasonable accuracy (Rank 1: 74% Rank-5: 92%) comparable to the Hotspotter results (Rank 1: 74% Rank 2: 84%)The PIE BGS LR model, in conjunction with Hotspotter, yielded the following results: Rank-1: 85%, Rank-5: 95%, Rank-20: 99%. In general, our findings indicate that PIE BGS LR, in conjunction with HotSpotter, can classify snow leopards more accurately than using either algorithm alone. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
SLN @ rakhee @ |
Serial |
1723 |
|
Permanent link to this record |
|
|
|
|
Author |
Gripenberg, U. |
|
|
Title |
Comparison of chromosome banding patterns in the snow leopard (Panthera uncial) and in other felids |
Type |
Unsupported: Serial (Book, Monograph) |
|
Year |
1982 |
Publication |
|
Abbreviated Journal |
|
|
|
Volume |
|
Issue |
|
Pages |
135-138 |
|
|
Keywords ![sorted by Keywords field, ascending order (up)](img/sort_asc.gif) |
Banding; Chromosome; felids; International; patterns; pedigree; snow leopard |
|
|
Abstract |
|
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
International Pedigree Book of Snow Leopards |
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
3 |
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
SLN @ rana @ 966 |
Serial |
353 |
|
Permanent link to this record |
|
|
|
|
Author |
Wang, X.; Peng, J.; Zhou, H. |
|
|
Title |
Preliminary observations on the distribution and status of dwarf blue sheep Pseudois schaeferi |
Type |
Journal Article |
|
Year |
2000 |
Publication |
Oryx |
Abbreviated Journal |
|
|
|
Volume |
34 |
Issue |
1 |
Pages |
21-26 |
|
|
Keywords ![sorted by Keywords field, ascending order (up)](img/sort_asc.gif) |
Batang County of China; conservation; status; distribution; dwarf blue sheep; Pseudois schaeferi.; 5190 |
|
|
Abstract |
Describes the drastic decline of the dwarf blue sheep since the 1950's primarily due to over-hunting. There are an estimated 200 individuals remaining in a 295 square km range in Batang county, China. The authors recommend urgent protection for this species. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
Full text available at URL |
Approved |
no |
|
|
Call Number |
SLN @ rana @ 504 |
Serial |
1004 |
|
Permanent link to this record |
|
|
|
|
Author |
Kachel, S., Anderson, K., Shokirov, Q. |
|
|
Title |
Predicting carnivore habitat use and livestock depredation risk with false-positive multi-state occupancy models |
Type |
Journal Article |
|
Year |
2022 |
Publication |
Biological Conservation |
Abbreviated Journal |
|
|
|
Volume |
271 |
Issue |
109588 |
Pages |
1-10 |
|
|
Keywords ![sorted by Keywords field, ascending order (up)](img/sort_asc.gif) |
Bayesian hierarchical model,False-positive,Multi-state occupancy,Human-carnivore conflict,Livestock depredation,Snow leopard,Lynx,Wolf,Bear |
|
|
Abstract |
The cycle of livestock depredation and retaliatory killing constitutes a major threat to large carnivores worldwide and imposes considerable hardships on human communities. Mitigation efforts are often undertaken with little knowledge of ecological underpinnings and patterns of depredation, limiting conservationists' ability to develop, prioritize, and evaluate solutions. Carnivore detection and depredation data from interviews in affected communities may help address this gap, but such data are often prone to false-positive uncertainty. To address these challenges in the Pamir Mountains of Tajikistan we collected snow leopard, lynx, wolf, and bear detection and depredation reports from local communities via semi-structured interviews. We used a novel hierarchical multi-species multi-state occupancy model that accounted for potential false-positives to investigate carnivore site use and depredation concurrently with respondents' apparent vulnerability to that risk. Estimated false-positive probabilities were small, but failure to account for them overstated site use probabilities and depredation risk for all species. Although individual vulnerability was low, depredation was nonetheless commonplace. Carnivore site use was driven by clear habitat associations, but we did not identify any clearly important large-scale spatial correlates of depredation risk despite considerable spatial variation in that risk. Respondents who sheltered livestock in household corrals reinforced with wire mesh were less likely to report snow leopard depredations. Reducing depredation and retaliation at adequately large scales in the Pamirs will likely require a portfolio of species-specific strategies, including widespread proactive corral improvements. Our approach expanded inference on the often-cryptic processes surrounding human-carnivore conflict even though structured wildlife data were scarce. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
SLN @ rakhee @ |
Serial |
1681 |
|
Permanent link to this record |
|
|
|
|
Author |
Sangay, T.; Vernes, K. |
|
|
Title |
Human-wildlife conflict in the Kingdom of Bhutan: Patterns of livestock predation by large mammalian carnivores |
Type |
Miscellaneous |
|
Year |
2008 |
Publication |
Biological Conservation |
Abbreviated Journal |
|
|
|
Volume |
141 |
Issue |
|
Pages |
1272-1282 |
|
|
Keywords ![sorted by Keywords field, ascending order (up)](img/sort_asc.gif) |
bear; Bhutan; compensation; conflict; Himalayas; leopard; livestock; predation; snow leopard; tiger |
|
|
Abstract |
We examined predation activity throughout Bhutan by tiger (Panthera tigris), common leopard (Panthera pardus), snow leopard (Uncia uncia) and Himalayan black bear (Ursus thibetanus) on a variety of livestock types using data gathered over the first two years (2003-2005) of a compensation scheme for livestock losses. One thousand three hundred and seventy five kills were documented, with leopards killing significantly more livestock (70% of all kills),
than tigers (19%), bears (8%) and snow leopards (2%). About 50% of livestock killing were of cattle, and about 33% were of horses, with tigers, leopards and snow leopards killing a significantly greater proportion of horses than predicted from availability. Examination of cattle kills showed that leopards killed a significantly greater proportion of smaller prey (e.g., calves), whereas tigers killed a significantly greater proportion of larger prey (e.g., bulls). Overall, livestock predation was greatest in summer and autumn which corresponded with a peak in cropping agriculture; livestock are turned out to pasture and forest during the cropping season, and subsequently, are less well guarded than at other times. Across Bhutan, high horse density and low cattle and yak density were associated with high rates of livestock attack, but no relationship was found with forest cover or human population density. Several northern districts were identified as 'predation hotspots', where proportions of livestock lost to predation were considerable, and the ratio of reported kills to relative abundance of livestock was high. Implications of our findings for mitigating livestock losses and for conserving large carnivores in Bhutan are discussed. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
SLN @ rana @ 903 |
Serial |
842 |
|
Permanent link to this record |