昼夜活动的沙漠刺毛鼠之间的时间划分：能量和水分周转成本。

Temporal partitioning among diurnally and nocturnally active desert spiny mice: energy and water turnover costs.

作者信息

Kronfeld-Schor N, Shargal E, Haim A, Dayan T, Zisapel N, Heldmaier G

机构信息

Department of Zoology, Tel Aviv University, 69978, Tel Aviv, Israel

出版信息

J Therm Biol. 2001 Apr;26(2):139-142. doi: 10.1016/s0306-4565(00)00034-6.

DOI:10.1016/s0306-4565(00)00034-6

PMID:11163930

Abstract

Nocturnal Acomys cahirinus and diurnally active A. russatus coexist in hot rocky deserts. Diurnal and nocturnal activity exposes them to different climatic challenges. A doubly-labelled water field study revealed no significant differences in water turnover between the species at all seasons, reflecting the adaptations of A. russatus to water conservation. In summers the energy expenditure of A. russatus tended to be higher than that of A. cahirinus. Energy requirements of A. cahirinus in winter are double than that of A. russatus, and may reflect the cost of thermoregulating during cold nights.

摘要

夜行性的埃及刺鼠和昼行性的罗氏刺鼠共同生活在炎热的岩石沙漠中。昼夜活动使它们面临不同的气候挑战。一项双标水野外研究表明，这两个物种在所有季节的水分周转率均无显著差异，这反映了罗氏刺鼠对节水的适应能力。在夏季，罗氏刺鼠的能量消耗往往高于埃及刺鼠。埃及刺鼠在冬季的能量需求是罗氏刺鼠的两倍，这可能反映了在寒冷夜晚进行体温调节的成本。