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Jackson, R. (1991). A wildlife survey of the Qomolangma Nature Preserve, Tibetian Autonomous Region, Peoples Republic of China. Franklin, West Virginia: Woodlands Mountain Institute.
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Jackson, R. (1991). Snow Leopards and Other Wildlife in the Qomolang,a Nature Preserve of Tibet (Vol. ix). Seattle: International Snow Leopard Trust.
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Schaller, G., Li, H., Lipu, T., Ren, J. Qiu, M. (1991). Snow Leopards in Xin Jiang, China. Arid Zone Research, , 74–78.
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Allabergenov E. (1991). The cat family. 1991.
Abstract: It provides field signs and brief comparative characteristic of cat species in Uzbekistan, five of which are included in the Red Data Book of Uzbekistan and the USSR: lynx, caracal, manul, snow leopard and cheetah. Snow leopard is protected in the Zaamin, Chatkal, and Gissar nature reserves. A snow leopard female bears up to five cubs (normally two three) once in two years. Gestation period is 90 days. Female suckles her cubs until they reach the age of three four months.
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Grachev, U. A., & Fedosenko, A. K. (1991). Distribution and Numbers of Snow Leopard in Kazakhstan (Vol. ix). Seattle: Islt.
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Grachev Yu.A. (1991). Snow leopard Uncia uncia Sch. 1775 (Vol. Vol. 1. Animals.).
Abstract: Snow leopard is a rare species with shrinking habitat and decreasing population (category III). It is distributed in Tien Shan (the ridges of Karjantau, Ugam, Talas, Kyrgyz, Zailiyskiy, Kunghey, Terskey, Ketmen), Djungar Alatau, Tarbagatai, Saur, and South Altai. This species has disappeared in the Syrdarya Karatau and the mountains of North Tien Shan. Its total number in Kazakhstan is estimated to be 180-200 animals. The threats are reduction of mountain ungulates and poaching. Snow leopard is protected in the Aksu-Djabagly, Alma-Ata, and Markakol nature reserves and the Alma-Ata, Lepsin, and Tokhta sanctuaries. The Djungar nature reserve needs to be established.
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Fox, J. L. (1991). Wildlife Ecology Workshop Held in Indias Himalaya Region (Vol. ix). Seattle: Islt.
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Allabergenov E. (1991). Predator that will never attack a man (Vol. 1 207 (7. 896)).
Abstract: Irbis is a very endangered species in Uzbekistan. The article provides a brief description of the snow leopard appearance and distribution. Reasons for reduction of snow leopard population is reduction of ungulate populations it preys on ibex and wild sheep and anthropogenic disturbance. Hunting for snow leopard is prohibited everywhere.
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Mallon, D. P. (1991). Status and Conservation of Large Mammals in Ladakh. Biological Conservation, 56(1), 101–119.
Abstract: The distribution and status of large mammals was surveyed in a 15 000 km2 study area in Ladakh, India. Snow leopard Panthera uncia, wolf Canis lupus, ibex Capra ibex and bharal Pseudois nayaur have an almost continuous distribution throughout; Ladakh urial Ovis vignei, Tibetan argali Ovis ammon, wild ass Equus kiang and brown bear Ursus arctos have a limited distribution. Snow leopard prefer lower altitudes and rocky, undisturbed areas. Ibex and bharal occupy similar rocky habitats but their ranges are mostly separate, with a small area of overlap. The Ladakh urial shows signs of recovery from an earlier decline. Natural resources are widely used for fuel, fodder and grazing, but favourable factors include a low human population, low level of hunting and the existence of some uninhabited and undisturbed areas. A comprehensive Protected Area Network has been proposed.
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Munson, L., & Worley, M. B. (1991). Veno-occlusive disease in snow leopards (Panthera uncia) from zoological parks. Vet Pathol, 28(1), 37–45.
Abstract: Livers from 54 snow leopards, 4 days to 23 years old, that had died in 23 US zoos, were evaluated histopathologically to determine if the hepatic fibrosis, which has been noted to be prevalent in this species, was due to chronic active hepatitis from hepadnaviral infection, Ito cell proliferation, or hemosiderosis. Forty-two of 54 snow leopards had subintimal vascular fibrosis with partial or total occlusion of central and sublobular veins (veno-occlusive disease) of unknown origin. All 21 leopards older than 5 years were affected. Four leopards had chronic active hepatitis, and 12 leopards had cholangiohepatitis; but these lesions were not connected anatomically to central and sublobular venous fibrosis. Hepatocellular and Kupffer cell siderosis and Ito cell proliferation were prevalent and often coexisted with perisinusoidal, central, and sublobular venous fibrosis; but fibrosis was present in leopards without siderosis or Ito cell proliferation. The pattern and prevalence of veno-occlusive disease in these leopards was similar to that reported in captive cheetah (Acinonyx jubatus), suggesting that a common extrinsic factor may cause the majority of hepatic disease in these large felid animals in captivity.
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