Early pregnancy diagnosis of captive Amur tigers (Panthera tigris altaica) |
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| Institution: | 1. Mudanjiang Normal University, Wenhua Street, Aimin County, Mudanjiang City, Heilongjiang Province, China;2. Northeast Forestry University, Harbin City, Heilongjiang Province, China;3. Mudanjiang Second Senior High School, Mudanjiang City, Heilongjiang Province, China;4. Mudanjiang No. 14 Junior Senior High School, Mudanjiang City, Heilongjiang Province, China;5. Mudanjiang Normal University, Mudanjiang City, Heilongjiang Province, China;6. The China Hengdaohezi Feline Breeding Center, Mudanjiang City, Heilongjiang Province, China;1. Department of Botany, Govt. Post Graduate College, Mansehra, Khyber Pakhtunkhwa 21300, Pakistan;2. Department of Botany, Hazara University Mansehra-21300, Khyber Pakhtunkhwa, Pakistan;3. William L. Brown Center, Missouri Botanical Garden, P.O. Box 299, St. Louis, MO 63166-0299, USA;4. Department of Plant Production, College of Food & Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia;5. Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia;6. Department of Biology, University of Sao Paolo, Brazil;7. Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan;1. Dept. of Forestry, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar (W.B), India;2. Department of Agronomy, RRS, Terai Zone, UBKV, (W.B), India;3. Department of Forestry, College of Agriculture, Fisheries and Forestry, Koronivia Campus, PO. Box No. 1544, Nausori, Fiji National University, Republic of Fiji Islands;1. State Key Laboratory of Earth Surface Processes and Resource Ecology, School of Natural Resources, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China;2. Department of Geography, The University of Hong Kong, Hong Kong, China |
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| Abstract: | From January 2015 to February 2017, urine samples was collected from twelve captive female Amur tigers during both their mating (or receptive) periods and the first four weeks after mating at the Hengdaohezi Feline Breeding Center (FBC) in China. A radioimmunoassay was applied to determine the progesterone levels in the urine samples. The relationship between progesterone levels and pregnancy in Amur tigers was assessed according to whether the tigers gave birth in the end. Results showed that average progesterone levels increased significantly (P < .05) after mating for all female tigers having parturition. And the minimum value of progesterone levels of them during the fourth week after mating was consistently higher than 0.21 ng/mL, the maximum value in mating period of all female tigers. However, there were no significant differences in progesterone levels between mating period and the first four weeks after mating of the female tigers having no parturition. Therefore, early pregnancy in captive Amur tigers can be diagnosed when urine progesterone concentrations attain a level higher than 0.21 ng/mL for seven days in a row after mating. |
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