膳食蛋白质缺乏对非洲林地睡鼠(Graphiurus murinus)食物消耗和Torpor的影响

IF 0.8 4区 生物学 Q3 ZOOLOGY
Mammal Study Pub Date : 2021-10-11 DOI:10.3106/ms2020-0102
Takeshi Eto, Sayako Hidaka, Hiroki Shichijo, Goro A. Nagura-Kato, Tetsuo Morita
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引用次数: 0

摘要

摘要许多异养动物使用鱼雷来保存能量以应对食物短缺。粮食短缺不仅影响能源预算,还影响营养状况的其他方面。除了作为能量底物外,膳食蛋白质还提供重要的营养素,包括必需氨基酸,其中一些不能从头合成。我们评估了一种假设,即饮食蛋白质缺乏会导致非洲林地睡鼠(Graphiurus murinus)的迟钝,以此作为调节蛋白质代谢的一种手段。睡鼠是一种饮食蛋白质丰富、缺乏盲肠的啮齿动物,这限制了后肠发酵和食粪的潜力。在温度中性条件下,每两周给睡鼠喂食一次能量含量相等的对照日粮和非蛋白质日粮。虽然睡鼠在对照条件下不表达迟钝,但有些在蛋白质缺乏的条件下表达迟钝。在表达迟钝的睡鼠中,一只保持了与对照饮食期间相当的能量摄入,而另一只则由于自发减少了食物消耗而减少了能量摄入。这些结果表明,即使在没有能量限制和热应激的情况下,饮食蛋白质缺乏也可以直接或间接诱导迟钝。在任何一种情况下,对某些营养素缺乏的反应迟钝都会减少对营养素的需求。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dietary Protein Deficiency Affects Food Consumption and Torpor in the African Woodland Dormouse (Graphiurus murinus)
Abstract. Many heterotherms employ torpor to conserve energy to cope with food shortage. Food shortage affects not only energy budgets but also other aspects of nutritional status. In addition to serving as an energy substrate, dietary proteins also provide vital nutrients including essential amino acids, some of which cannot be synthesized de novo. We evaluated the hypothesis that dietary protein deficiency induces torpor as a means of adjusting protein metabolism in the African woodland dormouse (Graphiurus murinus), a rodent with a protein-rich diet and lacking a cecum, which limits the potential for hindgut fermentation and coprophagy. Dormice were fed control and non-protein diets with equivalent energy content every two weeks under thermoneutral conditions. While the dormice did not express torpor under control conditions, some did under protein-deficient conditions. Among dormice expressing torpor, one maintained energy intake comparable to that during the control diet period, whereas the other reduced energy intake due to spontaneously reduced food consumption. These results suggest that torpor can be induced directly or indirectly by dietary protein deficiency even in the absence of energy constraints and thermal stress. In either case, torpor in response to deficiency in certain nutrients can reduce demands of the nutrient.
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来源期刊
Mammal Study
Mammal Study ZOOLOGY-
CiteScore
1.70
自引率
20.00%
发文量
23
审稿时长
>12 weeks
期刊介绍: Mammal Study is the official journal of the Mammal Society of Japan. It publishes original articles, short communications, and reviews on all aspects of mammalogy quarterly, written in English.
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