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Author |
Singh, N.J. |
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Title |
Animal – Habitat relationships in high altitude rangelands |
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2008 |
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PhD Thesis |
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150 |
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high altitude, homogeneous, argali, habitat selection, resource selection function, ENFA, stratified random sampling, sexual segregation, SSAS, livestock, predation, resources |
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This study conducted in the high altitude rangelands of Indian Transhimalaya, deals with basic questions regarding the ecology of an endangered species, the wildsheep Tibetan argali (Ovis ammon hodgsoni) and applied issues related to its conservation and potential conflict with the local nomadic pastoralists. The basic questions on ecology are aimed at delineating the habitat and resource selection processes, identifying factors causing sexual segregation and efficient surveying and sampling. The applied aspect focuses on the changing face of pastoralism and the potential impacts of modernising livestock husbandry on argali.
Overall, the study provides a general framework towards the understanding of argali-habitat relationships at different spatio-temporal scales. The spatial determinant associated with altitude in the area, predicts argali habitat and resource selection in this relatively homogenous landscape. These determine the range of other topographic variables and forage characteristics selected by argali. The selection of feeding patches in the selected range of altitude and topography is mainly characterised by their greenness and the quality of plant groups. Adjusting to changing forage quality, argali display an opportunistic feeding strategy, selecting grasses in early spring and switching to forbs later in summer. Nevertheless, the habitat selection process did not appear to differ among the sexes to drive sexual segregation. There was, however, strong segregation among the sexes as well as between lactating and non lactating females. The reasons for segregation appeared to be predominantly social, but driven ultimately by predation and concomitantly by resources. The habitat selection information was used to design a stratified random sampling strategy that led to i) a significant reduction in survey effort in sampling these sparsely distributed species and ii) reduction in sampling bias.
The applied aspect of the study outlines and evaluates the dramatic changes in the nomadic pastoralism that have occurred in the past five decades in the study area. These have led to a loss of pastures (-25 to -33%) of the nomads, consequent readjustment in traditional patterns of pasture use, intensified grazing pressures (25 to 70%) and rangeland degradation in the area. Such changes may have serious consequences on the survival of local wildlife, as tested with a study of the effects on argali of livestock presence and resource exploitation. Hence, a successful conservation and recovery strategy should focus on: minimising the impacts of livestock on argali, identifying the factors affecting the persistence of the current populations, increasing local sub populations of this species to prevent extinction due to stochastic events, prevent loss of genetic diversity and excessive fragmentation and thus ensuring gene flow.
Ecological Niche Factor Analyses (ENFA), bias-reduced logistic regression and Fuzzy correspondence analyses (FCA) were used to answer habitat and resource selection questions. A sexual segregation and aggregation statistic (SSAS) was used to estimate the components of sexual segregation and test segregation. SSAS combined with canonical correspondence analyses (CCA) allowed the estimation of segregation based on habitat variables. Logistic regression models were formulated to estimate models on which the stratified random sampling strategy was based. The 9 Animal – Habitat relationships in high altitude rangelands overall study also included surveys, interviews and literature reviews to understand the nomads’ movement and pasture use patterns of their livestock. Kernel density estimations (KDE) were used to estimate extent of range overlaps between livestock and argali. |
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University of Tromsø |
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Norway |
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English |
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SLN @ rana @ |
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1306 |
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Shrestha, R.; Wegge, P.; Koirala, R.A. |
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Title |
Summer diets of wild and domestic ungulates in Nepal Himalaya |
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Journal Article |
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2005 |
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Journal of Zoology |
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266 |
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111-119 |
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argali; blue sheep; Capra hircus; diet; faecal analysis; fecal analysis; mountain ungulates; Ovis ammon hodgsoni; pseudois nayaur |
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The selection of summer forage by three sympatric ungulates in the Damodar Kunda region of upper Mustang in
north Nepal was studied to assess the extent of food overlap between them. To compare their diets, a microhistological technique of faecal analysis was used, adjusted for inherent biases by comparing it with bite-count data obtained in domestic goats. Tibetan argali Ovis ammon hodgsoni, naur (blue sheep or bharal) Pseudois nayaur and domestic goat Capra hircus consumed mostly forbs, graminoids and browse, respectively. The proportions of food items in their diets were significantly different both at the plant species (P<0.02) and at the forage category level (P<0.001). Except for sharing three common plants (Agrostis sp., Stipa sp. and Potentilla fruticosa), dietary overlap at the species level was quite low. At the forage category level, naur and domestic goat overlapped more than the other ungulate pairs. Although all three species were opportunistic, mixed feeders, argali was a more selective forb specialist grazer than the other two ungulates. Owing to some spatial separation and little dietary overlap, interspecific competition for summer forage was low. If animal densities increase, however, goats are expected to compete more with naur than with argali because of their more similar diets. Owing to differences in forage selection by argali and naur throughout their large geographical ranges, reflecting adaptations to local ecological conditions, inferences regarding forage competition between domestic livestock and these two wild caprins need to be made from local, site-specific studies, rather than from general diet comparisons. |
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The Zoological Society of London |
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London |
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SLN @ rana @ 934 |
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888 |
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Schaller, G.B.; Tserendeleg, J.; Amarsana, G. |
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Title |
Observations on snow leopards in Mongolia |
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Conference Article |
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Year |
1994 |
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33-42 |
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Mongolia; gobi; Altay; Altai; survey; surveys; habitat; scrapes; markings; feces; spray; distribution; status; park; parks; reserve; reserves; refuge; activity; conservation; home-range; protected-areas; movements; predator; prey; diet; livestock; herders; ibex; argali; hunting; poaching; trapping; killing; browse; home range; protected areas; protected; 2710 |
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Islt |
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Usa |
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J.Fox; D.Jizeng |
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Full Text at URLTitle, Monographic: Proceedings of the Seventh International Snow Leopard Symposium. International Snow Leopard TrustPlace of Meeting: ChinaDate of Copyright: 1994 |
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SLN @ rana @ 258 |
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870 |
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Author |
Schaller, G. |
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Title |
Wildlife Survey in Tibet, Report #8 |
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Miscellaneous |
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1988 |
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Tibet; survey; Kashi; Xinjiang; antelope; wild-ass; gazzele; argali; blue-sheep; yak; wolf; brown-bear; livestock; hunting; trapping; poaching; browse; 4300 |
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Full Text at URL |
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SLN @ rana @ 418 |
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856 |
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Schaller, G. |
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Survey of Mountain Wildlife in Xinjiang, Report # 7 |
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Miscellaneous |
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1988 |
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Xinjiang; Arjin; shan; Kunlun; Taxkorgan; reserve; park; protected-area; China; antelope; wild-ass; argali; blue-sheep; gazzele; wolf; browse; 4290 |
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SLN @ rana @ 392 |
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855 |
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Author |
Sapozhnikov G.N. |
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Title |
Wild sheep in Tajikistan |
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1976 |
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199 p. |
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Tajikistan; urial; argali; taxonomy; morphology; variability; life history characteristics; distribution; number; diet; behavior; parasites; predators; snow leopard.; 8060; Russian |
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The monograph provides data concerning taxonomy, morphology, and age variability of wild sheep. There described distribution, number, population composition, behavioral patterns, reproduction, predators and parasites. Besides, a matter of conservation and sustainable use of the species is discussed. Together with wolf, snow leopard is called an enemy of O. o. vignei and argali (O. o. polii). |
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Full text available in Russian |
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SLN @ rana @ 784 |
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845 |
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Reading, R.P.; Mix, H.; Lhagvasuren, B.; Blumer, E.S. |
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Status of wild Bactrian camels and other large ungulates in south-western Mongolia |
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1999 |
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Oryx |
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33 |
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3 |
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247-255 |
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argali; Asian wild ass; Bactrian camels; Camelus bactrianus; goitred gazelle; Mongolia.; 5230 |
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Abstract Wild Bactrian camels Camelus bactrianus ferus are endangered. Surveys over the past several decades suggest a marked decline in camel numbers and reproductive success. However, most surveys were made using methods that precluded rigorous population estimation. The need for more accurate surveys resulted in an aerial survey of known and suspected camel habitat in Mongolia during March 1997. We estimated density, group density and population size of large mammals in south-western Mongolia using the interactive computer program DISTANCE. We recorded sufficient data for population modelling of wild Bactrian camels, goitred gazelles Gazella subgutturosa, Asian wild asses Equus hemionus and argali sheep Ovis ammon. We observed 277 camels in 27 groups (mean group size = 10.269 +- 2.38 SE camels: group). Modelling yielded a population estimate of 198 +- 802 SE camels in the survey area. Population modelling for other ungulates yielded estimates of 6046 +- 1398 SE goitred gazelles, 1674 +- 506 SE Asian wild asses and 909 +- 303 SE argalis. Discrepancies between population estimates of ungulates in our survey and previous surveys are discussed with regard to methods used and robustness of results obtained. We also discuss conservation implications for wild Bactrian camels and other Mongolian ungulates. |
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SLN @ rana @ 508 |
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812 |
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Reading, R.P.; Amgalanbaatar, S.; Mix, H.; Lhagvasuren, B. |
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Argali Ovis ammon surveys in Mongolia's South Gobi |
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1997 |
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31 |
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4 |
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285-294 |
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Mongolia; argali; gobi; livestock; population; status; 5220 |
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Claims poaching and competition with domestic livestock are threatening the argali's survival in Mongolia. The author's conducted aerial and ground surveys in the South Gobi and estimated a populaton size of approximately 3,900 argali. |
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Full text available at URL. |
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SLN @ rana @ 507 |
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811 |
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OGara, B.W. |
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Snow Leopards and Sport Hunting in The Mongolian Peoples Republic |
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1988 |
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215-225 |
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Mongolia; gobi; Altai; ibex; argali; hunting; conservation; predator; prey; livestock; herder; herders; browse; 1790 |
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Logging, overgrazing, cultivating steep slopes and overhunting are endangering wildlife, especially big game, in many areas I am familiar with in China Nepal and Pakistan. Attempted solutions have included the formation of parks and closing hunting seasons. But, without hunting seasons in poor countries, little money is available to enforce gamelaws except in the parks. |
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International Snow Leopared Trust |
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India |
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H.Freeman |
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Full Text at URLTitle, Monographic: Fifth International Snow Leopard SymposiumPlace of Meeting: Srinagar, IndiaDate of Copyright: 1988 |
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SLN @ rana @ 123 |
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736 |
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Namgail, T.; Fox, J.; Bhatnagar, Y.V. |
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Habitat segregation between sympatric Tibetan argali Ovis ammon hodgsoni and blue sheep Pseudois nayaur in the Indian Trans-Himalaya |
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2004 |
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Journal of Zoology |
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262 |
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57-63 |
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argali; Ovis ammon hodgsoni; blue sheep; pseudois nayaur; Habitat selection; resource partitioning; niche relationship; 5200 |
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Tibetan argali Ovis ammon hodgsoni and blue sheep Pseudois nayaur have almost completely overlapping distributions encompassing most of the Tibetan plateau and its margins. Such a sympatric distribution of related species with similar ecological requirements implies that there is some degree of resource partitioning. This may be accomplished on the basis of habitat and/or diet separation. This study evaluated such ecological separation on the basis of physical habitat partitioning by these two sympatric ungulates in Hemis High Altitude National Park, Ladakh, India, in an area where the argali established a small new population in 1978. Such separation was tested for
on the basis of expected difference between the species in their proximity to cliffs, associated with species-specific anti-predator behaviour. Tibetan argali selected habitats away from cliffs while blue sheep selected habitats close to cliffs. Blue sheep also selected steep slopes whereas argali selected gentle slopes. The two species did not differ
in their use of habitats in terms of elevation. They did, however, differ in their use of plant communities; blue sheep selected sub-shrub and grass-dominated communities whilst argali selected forb-dominated communities. We suggest that the two species coexist in this site as a result of the differential use of habitat associated with their
species-specific anti-predator strategies. |
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Full text available at URL |
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SLN @ rana @ 505 |
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710 |
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