Dynamics of Food Passing through the Digestive Tract in the Nocturnal Rodent Meriones crassus as a Response to the Rhythm of Feeding Activity

IF 0.5 4区生物学 Q4 BIOLOGY Biology Bulletin Pub Date : 2024-09-10 DOI:10.1134/s1062359024608206

E. I. Naumova, G. K. Zharova, T. Yu. Chistova

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Abstract

The dependence of the food passing through the digestive tract (DT) on feeding activity in the nocturnal rodent Meriones crassus was studied. Two groups of gerbils were housed in the laboratory under artificial lighting at a photoperiod of 12 : 12 L : D for 36 h. The groups were named “day” (L : D = 20 : 16) and “night” (L : D = 12 : 24) according to the predominance light or dark time during the experiment. The mean retention time of markers in the stomach in these groups was 20 and 30 h, respectively. The kinetics of the contents changed depending on the specific time of consumption of the markers and the saturation level of the rodents with food. During the daylight hours, sequential evacuation of markers entering the DT begins from the stomach after two hours, and at night, during a period of higher feeding activity, part of the food located in the fornix of the stomach and in the cecum stays here for a longer time. In the “day” group, by the end of the experiment, 84% of the markers were removed from the DT, and in the “night” group, about 55%.

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夜间啮齿类动物 Meriones crassus 消化道中食物通过的动态变化是对进食活动节律的反应

摘要研究了通过消化道（DT）的食物对夜间啮齿动物沙鼠摄食活动的依赖性。两组沙鼠被饲养在实验室中，在光周期为 12 : 12 L : D 的人工光照下生活了 36 小时。根据实验过程中主要的光照或黑暗时间，这两组沙鼠被命名为 "白天"（L : D = 20 : 16）和 "夜间"（L : D = 12 : 24）。这些组的标记物在胃中的平均滞留时间分别为 20 和 30 小时。胃内容物的动力学变化取决于啮齿动物摄入标记物的具体时间和食物饱和度。在白天，进入 DT 的标记物在两小时后开始从胃中依次排出，而在夜间，在进食活动较多的时期，位于胃穹窿和盲肠中的部分食物会在此停留较长时间。实验结束时，"白天 "组有 84% 的标记物从 DT 中清除，而 "夜间 "组则有 55% 左右。

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来源期刊

Biology Bulletin 生物-生物学

CiteScore

0.70

自引率

20.00%

发文量

审稿时长

4-8 weeks

期刊介绍： Biology Bulletin (Izvestiya Rossiiskoi Akademii Nauk – Seriya Biologicheskaya) is an interdisciplinary journal of general biology. It focuses on fundamental studies in the fields of cell biology, biochemistry, zoology, botany, physiology, and ecology. This journal publishes current materials of experimental studies and surveys on current problems in general biology. It also publishes information on scientific conferences and new books in the fields of general biology.