散热能力对黑线仓鼠能量代谢的影响  

The impact of heat dissipation capacity on the energy metabolism of stripedhamsters

作　　者：张开元 周健 曹静[1] 赵志军[1] ZHANG Kaiyuan;ZHOU Jian;CAO Jing;ZHAO Zhijun(School of Life and Environmental Sciences,Wenzhou University,Wenzhou 325035,China)

机构地区：[1]温州大学生命与环境科学学院,温州325035

出　　处：《生态学报》2025年第4期1763-1774,共12页Acta Ecologica Sinica

基　　金：国家自然基金(31870388)。

摘　　要：能量代谢的适应性调节是小型哺乳动物应对环境变化的主要策略之一。为探讨动物的散热能力对能量代谢和脂肪累积的影响,通过高温(32.5℃)驯化和剃毛处理改变黑线仓鼠(Cricetulus barabensis)的散热能力。8周后,测定体重、摄入能、体温、代谢率,以及皮毛热传导率、脂肪重量、内脏各器官重量和下丘脑摄食相关神经肽的基因表达。结果显示,背部剃毛使黑线仓鼠散热能力提高,能量摄入和代谢率显著增加、体温显著下降,而脂肪累积未发生显著变化;高温驯化使散热能力降低,能量摄入和代谢率显著减少,体温升高,但脂肪累积显著增加。结果表明,机体的散热能力通过调节代谢产热的能量支出参与体脂含量的适应性调节,对其应对自然环境的季节变化具有重要的生理生态学意义。Adaptive regulation of energy metabolism is a key strategy of small mammals to cope with environmental changes.To investigate the impact of altered heat dissipation capacity on energy metabolism and fat accumulation in animals,this study manipulated the heat dissipation capacity in adult male striped hamsters(Cricetulus barabensis)by exposing them to high temperatures(32.5℃)or shaving for 8 weeks.Body mass,energy intake,body temperature,metabolic rate,fur thermal conductance,fat mass and visceral organ weight were measured.Additionally,the gene expression of neuropeptides associated with food intake regulation in the hypothalamus was determined.The results showed that dorsally shaved hamsters increased heat dissipation capacity,energy intake,and metabolic rate but decreased body temperature,without significantly altering body fat accumulation.In contrast,the exposure to high ambient temperature decreased heat dissipation capacity,energy intake,and metabolic rate,increased body temperature,but considerably increased fat accumulation.The results show that the heat dissipation capacity of small mammals changes metabolic thermogenesis and consequently regulates body fat content,which is of physiological and ecological significance for small mammals to cope with the seasonal changes of natural environment.

关 键 词：剃毛 热传导率 散热能力 体温调节 能量代谢 脂肪累积 黑线仓鼠 

分 类 号：Q493.8[生物学—生理学]