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African wild ass drinking behaviour on the Messir Plateau, Danakil Desert, Eritrea
Journal of Arid Environments ( IF 2.7 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.jaridenv.2020.104327
Redae T. Tesfai , Francesca Parrini , Norman Owen-Smith , Patricia D. Moehlman

Abstract The critically endangered African wild ass (Equus africanus) occurs in the Danakil Desert of Eritrea and Ethiopia. Drinking behaviour and the costs of accessing water are critical to understanding how this threatened equid survives in an arid environment. Drinking data and distance travelled to water of 24 females and five males were recorded for 83 days during four study years. Drinking frequency per individual per water source was obtained by calculating the number of water visits of an individual per successive days of observation. The travel distance to water was estimated by measuring the distance between the morning foraging location and the water point. During the dry months, female African wild ass with young foals visited permanent water once a day, travelled on average 9 km and drank only at night. Non-reproductive adult females and males travelled to water every 5–10 days. In rainfall months, females with young foals drank twice a day and on average travelled 3 km to water, but dispersed up to 7 km from temporary water sources when livestock arrived annually. This spatial exclusion from water sources due to livestock presence may reduce female African wild ass ability to provide sufficient milk to their foals.

中文翻译:

厄立特里亚达纳基尔沙漠梅西尔高原的非洲野驴饮酒行为

摘要 极度濒危的非洲野驴(Equus Africanus)生活在厄立特里亚和埃塞俄比亚的达纳基尔沙漠。饮水行为和取水成本对于了解这种受威胁的马如何在干旱环境中生存至关重要。在四年的研究中,记录了 83 天 24 名女性和 5 名男性的饮水数据和到水的距离。每个水源每个人的饮水频率是通过计算一个人每连续观察天的水访问次数来获得的。通过测量早晨觅食地点和取水点之间的距离来估计到水的旅行距离。在干旱的月份,带幼驹的雌性非洲野驴每天去恒水一次,平均行驶 9 公里,只在晚上喝水。非繁殖的成年雌性和雄性每隔 5-10 天就会到水里去。在降雨月份,带小马驹的雌性每天喝两次水,平均行驶 3 公里到水边,但是当牲畜每年到达时,它们会从临时水源分散到 7 公里。由于牲畜的存在,水源的空间排斥可能会降低雌性非洲野驴为其小马驹提供足够牛奶的能力。
更新日期:2021-02-01
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