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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
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Your Position :Home->Past Journals Catalog->2018 Vol.37 No.1

Non-invasive Study on Physiological Responses of Equus przewalskii in High Temperature Period of Summer
Author of the article:JI Shengnan1, XIAO Nengwen1, DENG Huaiqing2*, HU Defu3
Author's Workplace:1. Biodiversity Research Center, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
2. School of Life Sciences, Guizhou Normal University, Guiyang 550001, China;
3. School of Nature Conservation, Beijing Forestry University, Beijing 100083, China
Key Words:Equus przewalskii; high temperature stimulation; non-invasive sampling method; glucocorticoid; triiodothyronine
Abstract:Physiological responses of captive Przewalski's horses (Equus przewalskii) in high temperature period of summer were investigated at Xinjiang Wild Horse Breeding and Research Center using radioimmunoassay by the non-invasive sampling method. We randomly selected 5 adult male horses, 5 adult female horses and 5 lactating female horses from 5 family groups, to measure the levels of fecal metabolites of glucocorticoid and thyroid triiodothyronine (T3). The results showed that (1) E. przewalskii maintained high level of hormones in summer; (2) glucocorticoid metabolites level in 3 groups were significant different (F2, 60=22.885, P<0.001), and the order was male > female > lactating female; (3) Similarly, T3 level in different groups were also significantly different (F2, 60=37.780, P<0.001), and the order was female > male > lactating female; (4) However, the hormones performed no significant difference in various levels of heat stress (THI>28.9 vs. THI ≤ 28.9). Meanwhile, there was no significant interaction between group and stress level. Overall, the captive E. przewalskii performed different physiological responses to high temperature stimulation in summer. In light of these findings, we propose that these horses should be fed separately to prevent accidental injury caused by high temperature in summer of Xinjiang. Moreover, the non-invasive measurement of fecal glucocorticoid and T3 can be introduced as a monitoring method for captive E. przewalskii during high temperature period of summer, and provide a scientific basis for artificial management.
2018,37(1): 8-14 收稿日期:2017-07-01
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